1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 297fb7a0aSIngo Molnar /* 397fb7a0aSIngo Molnar * Scheduler internal types and methods: 497fb7a0aSIngo Molnar */ 595458477SIngo Molnar #ifndef _KERNEL_SCHED_SCHED_H 695458477SIngo Molnar #define _KERNEL_SCHED_SCHED_H 7325ea10cSIngo Molnar 8801c1419SIngo Molnar #include <linux/sched/affinity.h> 9dfc3401aSIngo Molnar #include <linux/sched/autogroup.h> 1055687da1SIngo Molnar #include <linux/sched/cpufreq.h> 11325ea10cSIngo Molnar #include <linux/sched/deadline.h> 124ff8f2caSIngo Molnar #include <linux/sched.h> 13325ea10cSIngo Molnar #include <linux/sched/loadavg.h> 14325ea10cSIngo Molnar #include <linux/sched/mm.h> 15801c1419SIngo Molnar #include <linux/sched/rseq_api.h> 16325ea10cSIngo Molnar #include <linux/sched/signal.h> 17321a874aSThomas Gleixner #include <linux/sched/smt.h> 18325ea10cSIngo Molnar #include <linux/sched/stat.h> 19325ea10cSIngo Molnar #include <linux/sched/sysctl.h> 204ff8f2caSIngo Molnar #include <linux/sched/task_flags.h> 2129930025SIngo Molnar #include <linux/sched/task.h> 22325ea10cSIngo Molnar #include <linux/sched/topology.h> 23ef8bd77fSIngo Molnar 244ff8f2caSIngo Molnar #include <linux/atomic.h> 254ff8f2caSIngo Molnar #include <linux/bitmap.h> 264ff8f2caSIngo Molnar #include <linux/bug.h> 274ff8f2caSIngo Molnar #include <linux/capability.h> 284ff8f2caSIngo Molnar #include <linux/cgroup_api.h> 294ff8f2caSIngo Molnar #include <linux/cgroup.h> 30325ea10cSIngo Molnar #include <linux/cpufreq.h> 314ff8f2caSIngo Molnar #include <linux/cpumask_api.h> 32325ea10cSIngo Molnar #include <linux/ctype.h> 334ff8f2caSIngo Molnar #include <linux/file.h> 344ff8f2caSIngo Molnar #include <linux/fs_api.h> 354ff8f2caSIngo Molnar #include <linux/hrtimer_api.h> 364ff8f2caSIngo Molnar #include <linux/interrupt.h> 374ff8f2caSIngo Molnar #include <linux/irq_work.h> 384ff8f2caSIngo Molnar #include <linux/jiffies.h> 394ff8f2caSIngo Molnar #include <linux/kref_api.h> 40325ea10cSIngo Molnar #include <linux/kthread.h> 414ff8f2caSIngo Molnar #include <linux/ktime_api.h> 424ff8f2caSIngo Molnar #include <linux/lockdep_api.h> 434ff8f2caSIngo Molnar #include <linux/lockdep.h> 444ff8f2caSIngo Molnar #include <linux/minmax.h> 454ff8f2caSIngo Molnar #include <linux/mm.h> 464ff8f2caSIngo Molnar #include <linux/module.h> 474ff8f2caSIngo Molnar #include <linux/mutex_api.h> 484ff8f2caSIngo Molnar #include <linux/plist.h> 494ff8f2caSIngo Molnar #include <linux/poll.h> 50325ea10cSIngo Molnar #include <linux/proc_fs.h> 51325ea10cSIngo Molnar #include <linux/profile.h> 52eb414681SJohannes Weiner #include <linux/psi.h> 534ff8f2caSIngo Molnar #include <linux/rcupdate.h> 544ff8f2caSIngo Molnar #include <linux/seq_file.h> 554ff8f2caSIngo Molnar #include <linux/seqlock.h> 564ff8f2caSIngo Molnar #include <linux/softirq.h> 574ff8f2caSIngo Molnar #include <linux/spinlock_api.h> 584ff8f2caSIngo Molnar #include <linux/static_key.h> 59391e43daSPeter Zijlstra #include <linux/stop_machine.h> 604ff8f2caSIngo Molnar #include <linux/syscalls_api.h> 61325ea10cSIngo Molnar #include <linux/syscalls.h> 624ff8f2caSIngo Molnar #include <linux/tick.h> 634ff8f2caSIngo Molnar #include <linux/topology.h> 644ff8f2caSIngo Molnar #include <linux/types.h> 654ff8f2caSIngo Molnar #include <linux/u64_stats_sync_api.h> 664ff8f2caSIngo Molnar #include <linux/uaccess.h> 674ff8f2caSIngo Molnar #include <linux/wait_api.h> 684ff8f2caSIngo Molnar #include <linux/wait_bit.h> 694ff8f2caSIngo Molnar #include <linux/workqueue_api.h> 70325ea10cSIngo Molnar 714ff8f2caSIngo Molnar #include <trace/events/power.h> 72b9e9c6caSIngo Molnar #include <trace/events/sched.h> 73b9e9c6caSIngo Molnar 744ff8f2caSIngo Molnar #include "../workqueue_internal.h" 754ff8f2caSIngo Molnar 76b9e9c6caSIngo Molnar #ifdef CONFIG_CGROUP_SCHED 77b9e9c6caSIngo Molnar #include <linux/cgroup.h> 78b9e9c6caSIngo Molnar #include <linux/psi.h> 79b9e9c6caSIngo Molnar #endif 80b9e9c6caSIngo Molnar 81b9e9c6caSIngo Molnar #ifdef CONFIG_SCHED_DEBUG 82b9e9c6caSIngo Molnar # include <linux/static_key.h> 83b9e9c6caSIngo Molnar #endif 84391e43daSPeter Zijlstra 857fce777cSIngo Molnar #ifdef CONFIG_PARAVIRT 867fce777cSIngo Molnar # include <asm/paravirt.h> 874ff8f2caSIngo Molnar # include <asm/paravirt_api_clock.h> 887fce777cSIngo Molnar #endif 897fce777cSIngo Molnar 90391e43daSPeter Zijlstra #include "cpupri.h" 916bfd6d72SJuri Lelli #include "cpudeadline.h" 92391e43daSPeter Zijlstra 939148a3a1SPeter Zijlstra #ifdef CONFIG_SCHED_DEBUG 949148a3a1SPeter Zijlstra # define SCHED_WARN_ON(x) WARN_ONCE(x, #x) 959148a3a1SPeter Zijlstra #else 966d3aed3dSIngo Molnar # define SCHED_WARN_ON(x) ({ (void)(x), 0; }) 979148a3a1SPeter Zijlstra #endif 989148a3a1SPeter Zijlstra 9945ceebf7SPaul Gortmaker struct rq; 100442bf3aaSDaniel Lezcano struct cpuidle_state; 10145ceebf7SPaul Gortmaker 102da0c1e65SKirill Tkhai /* task_struct::on_rq states: */ 103da0c1e65SKirill Tkhai #define TASK_ON_RQ_QUEUED 1 104cca26e80SKirill Tkhai #define TASK_ON_RQ_MIGRATING 2 105da0c1e65SKirill Tkhai 106391e43daSPeter Zijlstra extern __read_mostly int scheduler_running; 107391e43daSPeter Zijlstra 10845ceebf7SPaul Gortmaker extern unsigned long calc_load_update; 10945ceebf7SPaul Gortmaker extern atomic_long_t calc_load_tasks; 11045ceebf7SPaul Gortmaker 111a60707d7SZhen Ni extern unsigned int sysctl_sched_child_runs_first; 112a60707d7SZhen Ni 1133289bdb4SPeter Zijlstra extern void calc_global_load_tick(struct rq *this_rq); 114d60585c5SThomas Gleixner extern long calc_load_fold_active(struct rq *this_rq, long adjust); 1153289bdb4SPeter Zijlstra 1169d246053SPhil Auld extern void call_trace_sched_update_nr_running(struct rq *rq, int count); 117d9ab0e63SZhen Ni 118d9ab0e63SZhen Ni extern unsigned int sysctl_sched_rt_period; 119d9ab0e63SZhen Ni extern int sysctl_sched_rt_runtime; 120dafd7a9dSZhen Ni extern int sched_rr_timeslice; 121d9ab0e63SZhen Ni 122391e43daSPeter Zijlstra /* 123391e43daSPeter Zijlstra * Helpers for converting nanosecond timing to jiffy resolution 124391e43daSPeter Zijlstra */ 125391e43daSPeter Zijlstra #define NS_TO_JIFFIES(TIME) ((unsigned long)(TIME) / (NSEC_PER_SEC / HZ)) 126391e43daSPeter Zijlstra 127cc1f4b1fSLi Zefan /* 128cc1f4b1fSLi Zefan * Increase resolution of nice-level calculations for 64-bit architectures. 129cc1f4b1fSLi Zefan * The extra resolution improves shares distribution and load balancing of 130cc1f4b1fSLi Zefan * low-weight task groups (eg. nice +19 on an autogroup), deeper taskgroup 131cc1f4b1fSLi Zefan * hierarchies, especially on larger systems. This is not a user-visible change 132cc1f4b1fSLi Zefan * and does not change the user-interface for setting shares/weights. 133cc1f4b1fSLi Zefan * 134cc1f4b1fSLi Zefan * We increase resolution only if we have enough bits to allow this increased 13597fb7a0aSIngo Molnar * resolution (i.e. 64-bit). The costs for increasing resolution when 32-bit 13697fb7a0aSIngo Molnar * are pretty high and the returns do not justify the increased costs. 1372159197dSPeter Zijlstra * 13897fb7a0aSIngo Molnar * Really only required when CONFIG_FAIR_GROUP_SCHED=y is also set, but to 13997fb7a0aSIngo Molnar * increase coverage and consistency always enable it on 64-bit platforms. 140cc1f4b1fSLi Zefan */ 1412159197dSPeter Zijlstra #ifdef CONFIG_64BIT 142172895e6SYuyang Du # define NICE_0_LOAD_SHIFT (SCHED_FIXEDPOINT_SHIFT + SCHED_FIXEDPOINT_SHIFT) 1436ecdd749SYuyang Du # define scale_load(w) ((w) << SCHED_FIXEDPOINT_SHIFT) 14426cf5222SMichael Wang # define scale_load_down(w) \ 14526cf5222SMichael Wang ({ \ 14626cf5222SMichael Wang unsigned long __w = (w); \ 14726cf5222SMichael Wang if (__w) \ 14826cf5222SMichael Wang __w = max(2UL, __w >> SCHED_FIXEDPOINT_SHIFT); \ 14926cf5222SMichael Wang __w; \ 15026cf5222SMichael Wang }) 151cc1f4b1fSLi Zefan #else 152172895e6SYuyang Du # define NICE_0_LOAD_SHIFT (SCHED_FIXEDPOINT_SHIFT) 153cc1f4b1fSLi Zefan # define scale_load(w) (w) 154cc1f4b1fSLi Zefan # define scale_load_down(w) (w) 155cc1f4b1fSLi Zefan #endif 156cc1f4b1fSLi Zefan 1576ecdd749SYuyang Du /* 158172895e6SYuyang Du * Task weight (visible to users) and its load (invisible to users) have 159172895e6SYuyang Du * independent resolution, but they should be well calibrated. We use 160172895e6SYuyang Du * scale_load() and scale_load_down(w) to convert between them. The 161172895e6SYuyang Du * following must be true: 162172895e6SYuyang Du * 1639d061ba6SDietmar Eggemann * scale_load(sched_prio_to_weight[NICE_TO_PRIO(0)-MAX_RT_PRIO]) == NICE_0_LOAD 164172895e6SYuyang Du * 1656ecdd749SYuyang Du */ 166172895e6SYuyang Du #define NICE_0_LOAD (1L << NICE_0_LOAD_SHIFT) 167391e43daSPeter Zijlstra 168391e43daSPeter Zijlstra /* 169332ac17eSDario Faggioli * Single value that decides SCHED_DEADLINE internal math precision. 170332ac17eSDario Faggioli * 10 -> just above 1us 171332ac17eSDario Faggioli * 9 -> just above 0.5us 172332ac17eSDario Faggioli */ 17397fb7a0aSIngo Molnar #define DL_SCALE 10 174332ac17eSDario Faggioli 175332ac17eSDario Faggioli /* 17697fb7a0aSIngo Molnar * Single value that denotes runtime == period, ie unlimited time. 177391e43daSPeter Zijlstra */ 178391e43daSPeter Zijlstra #define RUNTIME_INF ((u64)~0ULL) 179391e43daSPeter Zijlstra 18020f9cd2aSHenrik Austad static inline int idle_policy(int policy) 18120f9cd2aSHenrik Austad { 18220f9cd2aSHenrik Austad return policy == SCHED_IDLE; 18320f9cd2aSHenrik Austad } 184d50dde5aSDario Faggioli static inline int fair_policy(int policy) 185d50dde5aSDario Faggioli { 186d50dde5aSDario Faggioli return policy == SCHED_NORMAL || policy == SCHED_BATCH; 187d50dde5aSDario Faggioli } 188d50dde5aSDario Faggioli 189391e43daSPeter Zijlstra static inline int rt_policy(int policy) 190391e43daSPeter Zijlstra { 191d50dde5aSDario Faggioli return policy == SCHED_FIFO || policy == SCHED_RR; 192391e43daSPeter Zijlstra } 193391e43daSPeter Zijlstra 194aab03e05SDario Faggioli static inline int dl_policy(int policy) 195aab03e05SDario Faggioli { 196aab03e05SDario Faggioli return policy == SCHED_DEADLINE; 197aab03e05SDario Faggioli } 19820f9cd2aSHenrik Austad static inline bool valid_policy(int policy) 19920f9cd2aSHenrik Austad { 20020f9cd2aSHenrik Austad return idle_policy(policy) || fair_policy(policy) || 20120f9cd2aSHenrik Austad rt_policy(policy) || dl_policy(policy); 20220f9cd2aSHenrik Austad } 203aab03e05SDario Faggioli 2041da1843fSViresh Kumar static inline int task_has_idle_policy(struct task_struct *p) 2051da1843fSViresh Kumar { 2061da1843fSViresh Kumar return idle_policy(p->policy); 2071da1843fSViresh Kumar } 2081da1843fSViresh Kumar 209391e43daSPeter Zijlstra static inline int task_has_rt_policy(struct task_struct *p) 210391e43daSPeter Zijlstra { 211391e43daSPeter Zijlstra return rt_policy(p->policy); 212391e43daSPeter Zijlstra } 213391e43daSPeter Zijlstra 214aab03e05SDario Faggioli static inline int task_has_dl_policy(struct task_struct *p) 215aab03e05SDario Faggioli { 216aab03e05SDario Faggioli return dl_policy(p->policy); 217aab03e05SDario Faggioli } 218aab03e05SDario Faggioli 21907881166SJuri Lelli #define cap_scale(v, s) ((v)*(s) >> SCHED_CAPACITY_SHIFT) 22007881166SJuri Lelli 221d76343c6SValentin Schneider static inline void update_avg(u64 *avg, u64 sample) 222d76343c6SValentin Schneider { 223d76343c6SValentin Schneider s64 diff = sample - *avg; 224d76343c6SValentin Schneider *avg += diff / 8; 225d76343c6SValentin Schneider } 226d76343c6SValentin Schneider 2272d3d891dSDario Faggioli /* 22839a2a6ebSValentin Schneider * Shifting a value by an exponent greater *or equal* to the size of said value 22939a2a6ebSValentin Schneider * is UB; cap at size-1. 23039a2a6ebSValentin Schneider */ 23139a2a6ebSValentin Schneider #define shr_bound(val, shift) \ 23239a2a6ebSValentin Schneider (val >> min_t(typeof(shift), shift, BITS_PER_TYPE(typeof(val)) - 1)) 23339a2a6ebSValentin Schneider 23439a2a6ebSValentin Schneider /* 235794a56ebSJuri Lelli * !! For sched_setattr_nocheck() (kernel) only !! 236794a56ebSJuri Lelli * 237794a56ebSJuri Lelli * This is actually gross. :( 238794a56ebSJuri Lelli * 239794a56ebSJuri Lelli * It is used to make schedutil kworker(s) higher priority than SCHED_DEADLINE 240794a56ebSJuri Lelli * tasks, but still be able to sleep. We need this on platforms that cannot 241794a56ebSJuri Lelli * atomically change clock frequency. Remove once fast switching will be 242794a56ebSJuri Lelli * available on such platforms. 243794a56ebSJuri Lelli * 244794a56ebSJuri Lelli * SUGOV stands for SchedUtil GOVernor. 245794a56ebSJuri Lelli */ 246794a56ebSJuri Lelli #define SCHED_FLAG_SUGOV 0x10000000 247794a56ebSJuri Lelli 248f9509153SQuentin Perret #define SCHED_DL_FLAGS (SCHED_FLAG_RECLAIM | SCHED_FLAG_DL_OVERRUN | SCHED_FLAG_SUGOV) 249f9509153SQuentin Perret 250794a56ebSJuri Lelli static inline bool dl_entity_is_special(struct sched_dl_entity *dl_se) 251794a56ebSJuri Lelli { 252794a56ebSJuri Lelli #ifdef CONFIG_CPU_FREQ_GOV_SCHEDUTIL 253794a56ebSJuri Lelli return unlikely(dl_se->flags & SCHED_FLAG_SUGOV); 254794a56ebSJuri Lelli #else 255794a56ebSJuri Lelli return false; 256794a56ebSJuri Lelli #endif 257794a56ebSJuri Lelli } 258794a56ebSJuri Lelli 259794a56ebSJuri Lelli /* 2602d3d891dSDario Faggioli * Tells if entity @a should preempt entity @b. 2612d3d891dSDario Faggioli */ 262332ac17eSDario Faggioli static inline bool 263332ac17eSDario Faggioli dl_entity_preempt(struct sched_dl_entity *a, struct sched_dl_entity *b) 2642d3d891dSDario Faggioli { 265794a56ebSJuri Lelli return dl_entity_is_special(a) || 266794a56ebSJuri Lelli dl_time_before(a->deadline, b->deadline); 2672d3d891dSDario Faggioli } 2682d3d891dSDario Faggioli 269391e43daSPeter Zijlstra /* 270391e43daSPeter Zijlstra * This is the priority-queue data structure of the RT scheduling class: 271391e43daSPeter Zijlstra */ 272391e43daSPeter Zijlstra struct rt_prio_array { 273391e43daSPeter Zijlstra DECLARE_BITMAP(bitmap, MAX_RT_PRIO+1); /* include 1 bit for delimiter */ 274391e43daSPeter Zijlstra struct list_head queue[MAX_RT_PRIO]; 275391e43daSPeter Zijlstra }; 276391e43daSPeter Zijlstra 277391e43daSPeter Zijlstra struct rt_bandwidth { 278391e43daSPeter Zijlstra /* nests inside the rq lock: */ 279391e43daSPeter Zijlstra raw_spinlock_t rt_runtime_lock; 280391e43daSPeter Zijlstra ktime_t rt_period; 281391e43daSPeter Zijlstra u64 rt_runtime; 282391e43daSPeter Zijlstra struct hrtimer rt_period_timer; 2834cfafd30SPeter Zijlstra unsigned int rt_period_active; 284391e43daSPeter Zijlstra }; 285a5e7be3bSJuri Lelli 286a5e7be3bSJuri Lelli void __dl_clear_params(struct task_struct *p); 287a5e7be3bSJuri Lelli 288332ac17eSDario Faggioli struct dl_bandwidth { 289332ac17eSDario Faggioli raw_spinlock_t dl_runtime_lock; 290332ac17eSDario Faggioli u64 dl_runtime; 291332ac17eSDario Faggioli u64 dl_period; 292332ac17eSDario Faggioli }; 293332ac17eSDario Faggioli 294332ac17eSDario Faggioli static inline int dl_bandwidth_enabled(void) 295332ac17eSDario Faggioli { 2961724813dSPeter Zijlstra return sysctl_sched_rt_runtime >= 0; 297332ac17eSDario Faggioli } 298332ac17eSDario Faggioli 299a57415f5SPeng Liu /* 300a57415f5SPeng Liu * To keep the bandwidth of -deadline tasks under control 301a57415f5SPeng Liu * we need some place where: 302a57415f5SPeng Liu * - store the maximum -deadline bandwidth of each cpu; 303a57415f5SPeng Liu * - cache the fraction of bandwidth that is currently allocated in 304a57415f5SPeng Liu * each root domain; 305a57415f5SPeng Liu * 306a57415f5SPeng Liu * This is all done in the data structure below. It is similar to the 307a57415f5SPeng Liu * one used for RT-throttling (rt_bandwidth), with the main difference 308a57415f5SPeng Liu * that, since here we are only interested in admission control, we 309a57415f5SPeng Liu * do not decrease any runtime while the group "executes", neither we 310a57415f5SPeng Liu * need a timer to replenish it. 311a57415f5SPeng Liu * 312a57415f5SPeng Liu * With respect to SMP, bandwidth is given on a per root domain basis, 313a57415f5SPeng Liu * meaning that: 314a57415f5SPeng Liu * - bw (< 100%) is the deadline bandwidth of each CPU; 315a57415f5SPeng Liu * - total_bw is the currently allocated bandwidth in each root domain; 316a57415f5SPeng Liu */ 317332ac17eSDario Faggioli struct dl_bw { 318332ac17eSDario Faggioli raw_spinlock_t lock; 31997fb7a0aSIngo Molnar u64 bw; 32097fb7a0aSIngo Molnar u64 total_bw; 321332ac17eSDario Faggioli }; 322332ac17eSDario Faggioli 323b4118988SLuca Abeni /* 324b4118988SLuca Abeni * Verify the fitness of task @p to run on @cpu taking into account the 325b4118988SLuca Abeni * CPU original capacity and the runtime/deadline ratio of the task. 326b4118988SLuca Abeni * 327b4118988SLuca Abeni * The function will return true if the CPU original capacity of the 328b4118988SLuca Abeni * @cpu scaled by SCHED_CAPACITY_SCALE >= runtime/deadline ratio of the 329b4118988SLuca Abeni * task and false otherwise. 330b4118988SLuca Abeni */ 331b4118988SLuca Abeni static inline bool dl_task_fits_capacity(struct task_struct *p, int cpu) 332b4118988SLuca Abeni { 333b4118988SLuca Abeni unsigned long cap = arch_scale_cpu_capacity(cpu); 334b4118988SLuca Abeni 335b4118988SLuca Abeni return cap_scale(p->dl.dl_deadline, cap) >= p->dl.dl_runtime; 336b4118988SLuca Abeni } 337b4118988SLuca Abeni 338f2cb1360SIngo Molnar extern void init_dl_bw(struct dl_bw *dl_b); 33906a76fe0SNicolas Pitre extern int sched_dl_global_validate(void); 34006a76fe0SNicolas Pitre extern void sched_dl_do_global(void); 34197fb7a0aSIngo Molnar extern int sched_dl_overflow(struct task_struct *p, int policy, const struct sched_attr *attr); 34206a76fe0SNicolas Pitre extern void __setparam_dl(struct task_struct *p, const struct sched_attr *attr); 34306a76fe0SNicolas Pitre extern void __getparam_dl(struct task_struct *p, struct sched_attr *attr); 34406a76fe0SNicolas Pitre extern bool __checkparam_dl(const struct sched_attr *attr); 34506a76fe0SNicolas Pitre extern bool dl_param_changed(struct task_struct *p, const struct sched_attr *attr); 34697fb7a0aSIngo Molnar extern int dl_cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpumask *trial); 347772b6539SDietmar Eggemann extern int dl_cpu_busy(int cpu, struct task_struct *p); 348391e43daSPeter Zijlstra 349391e43daSPeter Zijlstra #ifdef CONFIG_CGROUP_SCHED 350391e43daSPeter Zijlstra 351391e43daSPeter Zijlstra struct cfs_rq; 352391e43daSPeter Zijlstra struct rt_rq; 353391e43daSPeter Zijlstra 35435cf4e50SMike Galbraith extern struct list_head task_groups; 355391e43daSPeter Zijlstra 356391e43daSPeter Zijlstra struct cfs_bandwidth { 357391e43daSPeter Zijlstra #ifdef CONFIG_CFS_BANDWIDTH 358391e43daSPeter Zijlstra raw_spinlock_t lock; 359391e43daSPeter Zijlstra ktime_t period; 36097fb7a0aSIngo Molnar u64 quota; 36197fb7a0aSIngo Molnar u64 runtime; 362f4183717SHuaixin Chang u64 burst; 363bcb1704aSHuaixin Chang u64 runtime_snap; 3649c58c79aSZhihui Zhang s64 hierarchical_quota; 365391e43daSPeter Zijlstra 36666567fcbSbsegall@google.com u8 idle; 36766567fcbSbsegall@google.com u8 period_active; 36866567fcbSbsegall@google.com u8 slack_started; 36997fb7a0aSIngo Molnar struct hrtimer period_timer; 37097fb7a0aSIngo Molnar struct hrtimer slack_timer; 371391e43daSPeter Zijlstra struct list_head throttled_cfs_rq; 372391e43daSPeter Zijlstra 37397fb7a0aSIngo Molnar /* Statistics: */ 37497fb7a0aSIngo Molnar int nr_periods; 37597fb7a0aSIngo Molnar int nr_throttled; 376bcb1704aSHuaixin Chang int nr_burst; 377391e43daSPeter Zijlstra u64 throttled_time; 378bcb1704aSHuaixin Chang u64 burst_time; 379391e43daSPeter Zijlstra #endif 380391e43daSPeter Zijlstra }; 381391e43daSPeter Zijlstra 38297fb7a0aSIngo Molnar /* Task group related information */ 383391e43daSPeter Zijlstra struct task_group { 384391e43daSPeter Zijlstra struct cgroup_subsys_state css; 385391e43daSPeter Zijlstra 386391e43daSPeter Zijlstra #ifdef CONFIG_FAIR_GROUP_SCHED 38797fb7a0aSIngo Molnar /* schedulable entities of this group on each CPU */ 388391e43daSPeter Zijlstra struct sched_entity **se; 38997fb7a0aSIngo Molnar /* runqueue "owned" by this group on each CPU */ 390391e43daSPeter Zijlstra struct cfs_rq **cfs_rq; 391391e43daSPeter Zijlstra unsigned long shares; 392391e43daSPeter Zijlstra 39330400039SJosh Don /* A positive value indicates that this is a SCHED_IDLE group. */ 39430400039SJosh Don int idle; 39530400039SJosh Don 396fa6bddebSAlex Shi #ifdef CONFIG_SMP 397b0367629SWaiman Long /* 398b0367629SWaiman Long * load_avg can be heavily contended at clock tick time, so put 399b0367629SWaiman Long * it in its own cacheline separated from the fields above which 400b0367629SWaiman Long * will also be accessed at each tick. 401b0367629SWaiman Long */ 402b0367629SWaiman Long atomic_long_t load_avg ____cacheline_aligned; 403391e43daSPeter Zijlstra #endif 404fa6bddebSAlex Shi #endif 405391e43daSPeter Zijlstra 406391e43daSPeter Zijlstra #ifdef CONFIG_RT_GROUP_SCHED 407391e43daSPeter Zijlstra struct sched_rt_entity **rt_se; 408391e43daSPeter Zijlstra struct rt_rq **rt_rq; 409391e43daSPeter Zijlstra 410391e43daSPeter Zijlstra struct rt_bandwidth rt_bandwidth; 411391e43daSPeter Zijlstra #endif 412391e43daSPeter Zijlstra 413391e43daSPeter Zijlstra struct rcu_head rcu; 414391e43daSPeter Zijlstra struct list_head list; 415391e43daSPeter Zijlstra 416391e43daSPeter Zijlstra struct task_group *parent; 417391e43daSPeter Zijlstra struct list_head siblings; 418391e43daSPeter Zijlstra struct list_head children; 419391e43daSPeter Zijlstra 420391e43daSPeter Zijlstra #ifdef CONFIG_SCHED_AUTOGROUP 421391e43daSPeter Zijlstra struct autogroup *autogroup; 422391e43daSPeter Zijlstra #endif 423391e43daSPeter Zijlstra 424391e43daSPeter Zijlstra struct cfs_bandwidth cfs_bandwidth; 4252480c093SPatrick Bellasi 4262480c093SPatrick Bellasi #ifdef CONFIG_UCLAMP_TASK_GROUP 4272480c093SPatrick Bellasi /* The two decimal precision [%] value requested from user-space */ 4282480c093SPatrick Bellasi unsigned int uclamp_pct[UCLAMP_CNT]; 4292480c093SPatrick Bellasi /* Clamp values requested for a task group */ 4302480c093SPatrick Bellasi struct uclamp_se uclamp_req[UCLAMP_CNT]; 4310b60ba2dSPatrick Bellasi /* Effective clamp values used for a task group */ 4320b60ba2dSPatrick Bellasi struct uclamp_se uclamp[UCLAMP_CNT]; 4332480c093SPatrick Bellasi #endif 4342480c093SPatrick Bellasi 435391e43daSPeter Zijlstra }; 436391e43daSPeter Zijlstra 437391e43daSPeter Zijlstra #ifdef CONFIG_FAIR_GROUP_SCHED 438391e43daSPeter Zijlstra #define ROOT_TASK_GROUP_LOAD NICE_0_LOAD 439391e43daSPeter Zijlstra 440391e43daSPeter Zijlstra /* 441391e43daSPeter Zijlstra * A weight of 0 or 1 can cause arithmetics problems. 442391e43daSPeter Zijlstra * A weight of a cfs_rq is the sum of weights of which entities 443391e43daSPeter Zijlstra * are queued on this cfs_rq, so a weight of a entity should not be 444391e43daSPeter Zijlstra * too large, so as the shares value of a task group. 445391e43daSPeter Zijlstra * (The default weight is 1024 - so there's no practical 446391e43daSPeter Zijlstra * limitation from this.) 447391e43daSPeter Zijlstra */ 448391e43daSPeter Zijlstra #define MIN_SHARES (1UL << 1) 449391e43daSPeter Zijlstra #define MAX_SHARES (1UL << 18) 450391e43daSPeter Zijlstra #endif 451391e43daSPeter Zijlstra 452391e43daSPeter Zijlstra typedef int (*tg_visitor)(struct task_group *, void *); 453391e43daSPeter Zijlstra 454391e43daSPeter Zijlstra extern int walk_tg_tree_from(struct task_group *from, 455391e43daSPeter Zijlstra tg_visitor down, tg_visitor up, void *data); 456391e43daSPeter Zijlstra 457391e43daSPeter Zijlstra /* 458391e43daSPeter Zijlstra * Iterate the full tree, calling @down when first entering a node and @up when 459391e43daSPeter Zijlstra * leaving it for the final time. 460391e43daSPeter Zijlstra * 461391e43daSPeter Zijlstra * Caller must hold rcu_lock or sufficient equivalent. 462391e43daSPeter Zijlstra */ 463391e43daSPeter Zijlstra static inline int walk_tg_tree(tg_visitor down, tg_visitor up, void *data) 464391e43daSPeter Zijlstra { 465391e43daSPeter Zijlstra return walk_tg_tree_from(&root_task_group, down, up, data); 466391e43daSPeter Zijlstra } 467391e43daSPeter Zijlstra 468391e43daSPeter Zijlstra extern int tg_nop(struct task_group *tg, void *data); 469391e43daSPeter Zijlstra 470391e43daSPeter Zijlstra extern void free_fair_sched_group(struct task_group *tg); 471391e43daSPeter Zijlstra extern int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent); 4728663e24dSPeter Zijlstra extern void online_fair_sched_group(struct task_group *tg); 4736fe1f348SPeter Zijlstra extern void unregister_fair_sched_group(struct task_group *tg); 474391e43daSPeter Zijlstra extern void init_tg_cfs_entry(struct task_group *tg, struct cfs_rq *cfs_rq, 475391e43daSPeter Zijlstra struct sched_entity *se, int cpu, 476391e43daSPeter Zijlstra struct sched_entity *parent); 477391e43daSPeter Zijlstra extern void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b); 478391e43daSPeter Zijlstra 479391e43daSPeter Zijlstra extern void __refill_cfs_bandwidth_runtime(struct cfs_bandwidth *cfs_b); 48077a4d1a1SPeter Zijlstra extern void start_cfs_bandwidth(struct cfs_bandwidth *cfs_b); 481391e43daSPeter Zijlstra extern void unthrottle_cfs_rq(struct cfs_rq *cfs_rq); 482391e43daSPeter Zijlstra 483b027789eSMathias Krause extern void unregister_rt_sched_group(struct task_group *tg); 484391e43daSPeter Zijlstra extern void free_rt_sched_group(struct task_group *tg); 485391e43daSPeter Zijlstra extern int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent); 486391e43daSPeter Zijlstra extern void init_tg_rt_entry(struct task_group *tg, struct rt_rq *rt_rq, 487391e43daSPeter Zijlstra struct sched_rt_entity *rt_se, int cpu, 488391e43daSPeter Zijlstra struct sched_rt_entity *parent); 4898887cd99SNicolas Pitre extern int sched_group_set_rt_runtime(struct task_group *tg, long rt_runtime_us); 4908887cd99SNicolas Pitre extern int sched_group_set_rt_period(struct task_group *tg, u64 rt_period_us); 4918887cd99SNicolas Pitre extern long sched_group_rt_runtime(struct task_group *tg); 4928887cd99SNicolas Pitre extern long sched_group_rt_period(struct task_group *tg); 4938887cd99SNicolas Pitre extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk); 494391e43daSPeter Zijlstra 49525cc7da7SLi Zefan extern struct task_group *sched_create_group(struct task_group *parent); 49625cc7da7SLi Zefan extern void sched_online_group(struct task_group *tg, 49725cc7da7SLi Zefan struct task_group *parent); 49825cc7da7SLi Zefan extern void sched_destroy_group(struct task_group *tg); 499b027789eSMathias Krause extern void sched_release_group(struct task_group *tg); 50025cc7da7SLi Zefan 50125cc7da7SLi Zefan extern void sched_move_task(struct task_struct *tsk); 50225cc7da7SLi Zefan 50325cc7da7SLi Zefan #ifdef CONFIG_FAIR_GROUP_SCHED 50425cc7da7SLi Zefan extern int sched_group_set_shares(struct task_group *tg, unsigned long shares); 505ad936d86SByungchul Park 50630400039SJosh Don extern int sched_group_set_idle(struct task_group *tg, long idle); 50730400039SJosh Don 508ad936d86SByungchul Park #ifdef CONFIG_SMP 509ad936d86SByungchul Park extern void set_task_rq_fair(struct sched_entity *se, 510ad936d86SByungchul Park struct cfs_rq *prev, struct cfs_rq *next); 511ad936d86SByungchul Park #else /* !CONFIG_SMP */ 512ad936d86SByungchul Park static inline void set_task_rq_fair(struct sched_entity *se, 513ad936d86SByungchul Park struct cfs_rq *prev, struct cfs_rq *next) { } 514ad936d86SByungchul Park #endif /* CONFIG_SMP */ 515ad936d86SByungchul Park #endif /* CONFIG_FAIR_GROUP_SCHED */ 51625cc7da7SLi Zefan 517391e43daSPeter Zijlstra #else /* CONFIG_CGROUP_SCHED */ 518391e43daSPeter Zijlstra 519391e43daSPeter Zijlstra struct cfs_bandwidth { }; 520391e43daSPeter Zijlstra 521391e43daSPeter Zijlstra #endif /* CONFIG_CGROUP_SCHED */ 522391e43daSPeter Zijlstra 523*d05b4305SVincent Donnefort /* 524*d05b4305SVincent Donnefort * u64_u32_load/u64_u32_store 525*d05b4305SVincent Donnefort * 526*d05b4305SVincent Donnefort * Use a copy of a u64 value to protect against data race. This is only 527*d05b4305SVincent Donnefort * applicable for 32-bits architectures. 528*d05b4305SVincent Donnefort */ 529*d05b4305SVincent Donnefort #ifdef CONFIG_64BIT 530*d05b4305SVincent Donnefort # define u64_u32_load_copy(var, copy) var 531*d05b4305SVincent Donnefort # define u64_u32_store_copy(var, copy, val) (var = val) 532*d05b4305SVincent Donnefort #else 533*d05b4305SVincent Donnefort # define u64_u32_load_copy(var, copy) \ 534*d05b4305SVincent Donnefort ({ \ 535*d05b4305SVincent Donnefort u64 __val, __val_copy; \ 536*d05b4305SVincent Donnefort do { \ 537*d05b4305SVincent Donnefort __val_copy = copy; \ 538*d05b4305SVincent Donnefort /* \ 539*d05b4305SVincent Donnefort * paired with u64_u32_store_copy(), ordering access \ 540*d05b4305SVincent Donnefort * to var and copy. \ 541*d05b4305SVincent Donnefort */ \ 542*d05b4305SVincent Donnefort smp_rmb(); \ 543*d05b4305SVincent Donnefort __val = var; \ 544*d05b4305SVincent Donnefort } while (__val != __val_copy); \ 545*d05b4305SVincent Donnefort __val; \ 546*d05b4305SVincent Donnefort }) 547*d05b4305SVincent Donnefort # define u64_u32_store_copy(var, copy, val) \ 548*d05b4305SVincent Donnefort do { \ 549*d05b4305SVincent Donnefort typeof(val) __val = (val); \ 550*d05b4305SVincent Donnefort var = __val; \ 551*d05b4305SVincent Donnefort /* \ 552*d05b4305SVincent Donnefort * paired with u64_u32_load_copy(), ordering access to var and \ 553*d05b4305SVincent Donnefort * copy. \ 554*d05b4305SVincent Donnefort */ \ 555*d05b4305SVincent Donnefort smp_wmb(); \ 556*d05b4305SVincent Donnefort copy = __val; \ 557*d05b4305SVincent Donnefort } while (0) 558*d05b4305SVincent Donnefort #endif 559*d05b4305SVincent Donnefort # define u64_u32_load(var) u64_u32_load_copy(var, var##_copy) 560*d05b4305SVincent Donnefort # define u64_u32_store(var, val) u64_u32_store_copy(var, var##_copy, val) 561*d05b4305SVincent Donnefort 562391e43daSPeter Zijlstra /* CFS-related fields in a runqueue */ 563391e43daSPeter Zijlstra struct cfs_rq { 564391e43daSPeter Zijlstra struct load_weight load; 56597fb7a0aSIngo Molnar unsigned int nr_running; 56643e9f7f2SViresh Kumar unsigned int h_nr_running; /* SCHED_{NORMAL,BATCH,IDLE} */ 567a480addeSJosh Don unsigned int idle_nr_running; /* SCHED_IDLE */ 56843e9f7f2SViresh Kumar unsigned int idle_h_nr_running; /* SCHED_IDLE */ 569391e43daSPeter Zijlstra 570391e43daSPeter Zijlstra u64 exec_clock; 571391e43daSPeter Zijlstra u64 min_vruntime; 572c6047c2eSJoel Fernandes (Google) #ifdef CONFIG_SCHED_CORE 573c6047c2eSJoel Fernandes (Google) unsigned int forceidle_seq; 574c6047c2eSJoel Fernandes (Google) u64 min_vruntime_fi; 575c6047c2eSJoel Fernandes (Google) #endif 576c6047c2eSJoel Fernandes (Google) 577391e43daSPeter Zijlstra #ifndef CONFIG_64BIT 578391e43daSPeter Zijlstra u64 min_vruntime_copy; 579391e43daSPeter Zijlstra #endif 580391e43daSPeter Zijlstra 581bfb06889SDavidlohr Bueso struct rb_root_cached tasks_timeline; 582391e43daSPeter Zijlstra 583391e43daSPeter Zijlstra /* 584391e43daSPeter Zijlstra * 'curr' points to currently running entity on this cfs_rq. 585391e43daSPeter Zijlstra * It is set to NULL otherwise (i.e when none are currently running). 586391e43daSPeter Zijlstra */ 58797fb7a0aSIngo Molnar struct sched_entity *curr; 58897fb7a0aSIngo Molnar struct sched_entity *next; 58997fb7a0aSIngo Molnar struct sched_entity *last; 59097fb7a0aSIngo Molnar struct sched_entity *skip; 591391e43daSPeter Zijlstra 592391e43daSPeter Zijlstra #ifdef CONFIG_SCHED_DEBUG 593391e43daSPeter Zijlstra unsigned int nr_spread_over; 594391e43daSPeter Zijlstra #endif 595391e43daSPeter Zijlstra 5962dac754eSPaul Turner #ifdef CONFIG_SMP 5972dac754eSPaul Turner /* 5989d89c257SYuyang Du * CFS load tracking 5992dac754eSPaul Turner */ 6009d89c257SYuyang Du struct sched_avg avg; 6012a2f5d4eSPeter Zijlstra #ifndef CONFIG_64BIT 602*d05b4305SVincent Donnefort u64 last_update_time_copy; 6032a2f5d4eSPeter Zijlstra #endif 6042a2f5d4eSPeter Zijlstra struct { 6052a2f5d4eSPeter Zijlstra raw_spinlock_t lock ____cacheline_aligned; 6062a2f5d4eSPeter Zijlstra int nr; 6072a2f5d4eSPeter Zijlstra unsigned long load_avg; 6082a2f5d4eSPeter Zijlstra unsigned long util_avg; 6099f683953SVincent Guittot unsigned long runnable_avg; 6102a2f5d4eSPeter Zijlstra } removed; 611141965c7SAlex Shi 612c566e8e9SPaul Turner #ifdef CONFIG_FAIR_GROUP_SCHED 6130e2d2aaaSPeter Zijlstra unsigned long tg_load_avg_contrib; 6140e2d2aaaSPeter Zijlstra long propagate; 6150e2d2aaaSPeter Zijlstra long prop_runnable_sum; 6160e2d2aaaSPeter Zijlstra 61782958366SPaul Turner /* 61882958366SPaul Turner * h_load = weight * f(tg) 61982958366SPaul Turner * 62082958366SPaul Turner * Where f(tg) is the recursive weight fraction assigned to 62182958366SPaul Turner * this group. 62282958366SPaul Turner */ 62382958366SPaul Turner unsigned long h_load; 62468520796SVladimir Davydov u64 last_h_load_update; 62568520796SVladimir Davydov struct sched_entity *h_load_next; 62668520796SVladimir Davydov #endif /* CONFIG_FAIR_GROUP_SCHED */ 62782958366SPaul Turner #endif /* CONFIG_SMP */ 62882958366SPaul Turner 629391e43daSPeter Zijlstra #ifdef CONFIG_FAIR_GROUP_SCHED 63097fb7a0aSIngo Molnar struct rq *rq; /* CPU runqueue to which this cfs_rq is attached */ 631391e43daSPeter Zijlstra 632391e43daSPeter Zijlstra /* 633391e43daSPeter Zijlstra * leaf cfs_rqs are those that hold tasks (lowest schedulable entity in 634391e43daSPeter Zijlstra * a hierarchy). Non-leaf lrqs hold other higher schedulable entities 635391e43daSPeter Zijlstra * (like users, containers etc.) 636391e43daSPeter Zijlstra * 63797fb7a0aSIngo Molnar * leaf_cfs_rq_list ties together list of leaf cfs_rq's in a CPU. 63897fb7a0aSIngo Molnar * This list is used during load balance. 639391e43daSPeter Zijlstra */ 640391e43daSPeter Zijlstra int on_list; 641391e43daSPeter Zijlstra struct list_head leaf_cfs_rq_list; 642391e43daSPeter Zijlstra struct task_group *tg; /* group that "owns" this runqueue */ 643391e43daSPeter Zijlstra 64430400039SJosh Don /* Locally cached copy of our task_group's idle value */ 64530400039SJosh Don int idle; 64630400039SJosh Don 647391e43daSPeter Zijlstra #ifdef CONFIG_CFS_BANDWIDTH 648391e43daSPeter Zijlstra int runtime_enabled; 649391e43daSPeter Zijlstra s64 runtime_remaining; 650391e43daSPeter Zijlstra 65197fb7a0aSIngo Molnar u64 throttled_clock; 65264eaf507SChengming Zhou u64 throttled_clock_pelt; 65364eaf507SChengming Zhou u64 throttled_clock_pelt_time; 65497fb7a0aSIngo Molnar int throttled; 65597fb7a0aSIngo Molnar int throttle_count; 656391e43daSPeter Zijlstra struct list_head throttled_list; 657391e43daSPeter Zijlstra #endif /* CONFIG_CFS_BANDWIDTH */ 658391e43daSPeter Zijlstra #endif /* CONFIG_FAIR_GROUP_SCHED */ 659391e43daSPeter Zijlstra }; 660391e43daSPeter Zijlstra 661391e43daSPeter Zijlstra static inline int rt_bandwidth_enabled(void) 662391e43daSPeter Zijlstra { 663391e43daSPeter Zijlstra return sysctl_sched_rt_runtime >= 0; 664391e43daSPeter Zijlstra } 665391e43daSPeter Zijlstra 666b6366f04SSteven Rostedt /* RT IPI pull logic requires IRQ_WORK */ 6674bdced5cSSteven Rostedt (Red Hat) #if defined(CONFIG_IRQ_WORK) && defined(CONFIG_SMP) 668b6366f04SSteven Rostedt # define HAVE_RT_PUSH_IPI 669b6366f04SSteven Rostedt #endif 670b6366f04SSteven Rostedt 671391e43daSPeter Zijlstra /* Real-Time classes' related field in a runqueue: */ 672391e43daSPeter Zijlstra struct rt_rq { 673391e43daSPeter Zijlstra struct rt_prio_array active; 674c82513e5SPeter Zijlstra unsigned int rt_nr_running; 67501d36d0aSFrederic Weisbecker unsigned int rr_nr_running; 676391e43daSPeter Zijlstra #if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED 677391e43daSPeter Zijlstra struct { 678391e43daSPeter Zijlstra int curr; /* highest queued rt task prio */ 679391e43daSPeter Zijlstra #ifdef CONFIG_SMP 680391e43daSPeter Zijlstra int next; /* next highest */ 681391e43daSPeter Zijlstra #endif 682391e43daSPeter Zijlstra } highest_prio; 683391e43daSPeter Zijlstra #endif 684391e43daSPeter Zijlstra #ifdef CONFIG_SMP 685e6fe3f42SAlexey Dobriyan unsigned int rt_nr_migratory; 686e6fe3f42SAlexey Dobriyan unsigned int rt_nr_total; 687391e43daSPeter Zijlstra int overloaded; 688391e43daSPeter Zijlstra struct plist_head pushable_tasks; 689371bf427SVincent Guittot 690b6366f04SSteven Rostedt #endif /* CONFIG_SMP */ 691f4ebcbc0SKirill Tkhai int rt_queued; 692f4ebcbc0SKirill Tkhai 693391e43daSPeter Zijlstra int rt_throttled; 694391e43daSPeter Zijlstra u64 rt_time; 695391e43daSPeter Zijlstra u64 rt_runtime; 696391e43daSPeter Zijlstra /* Nests inside the rq lock: */ 697391e43daSPeter Zijlstra raw_spinlock_t rt_runtime_lock; 698391e43daSPeter Zijlstra 699391e43daSPeter Zijlstra #ifdef CONFIG_RT_GROUP_SCHED 700e6fe3f42SAlexey Dobriyan unsigned int rt_nr_boosted; 701391e43daSPeter Zijlstra 702391e43daSPeter Zijlstra struct rq *rq; 703391e43daSPeter Zijlstra struct task_group *tg; 704391e43daSPeter Zijlstra #endif 705391e43daSPeter Zijlstra }; 706391e43daSPeter Zijlstra 707296b2ffeSVincent Guittot static inline bool rt_rq_is_runnable(struct rt_rq *rt_rq) 708296b2ffeSVincent Guittot { 709296b2ffeSVincent Guittot return rt_rq->rt_queued && rt_rq->rt_nr_running; 710296b2ffeSVincent Guittot } 711296b2ffeSVincent Guittot 712aab03e05SDario Faggioli /* Deadline class' related fields in a runqueue */ 713aab03e05SDario Faggioli struct dl_rq { 714aab03e05SDario Faggioli /* runqueue is an rbtree, ordered by deadline */ 7152161573eSDavidlohr Bueso struct rb_root_cached root; 716aab03e05SDario Faggioli 717e6fe3f42SAlexey Dobriyan unsigned int dl_nr_running; 7181baca4ceSJuri Lelli 7191baca4ceSJuri Lelli #ifdef CONFIG_SMP 7201baca4ceSJuri Lelli /* 7211baca4ceSJuri Lelli * Deadline values of the currently executing and the 7221baca4ceSJuri Lelli * earliest ready task on this rq. Caching these facilitates 723dfcb245eSIngo Molnar * the decision whether or not a ready but not running task 7241baca4ceSJuri Lelli * should migrate somewhere else. 7251baca4ceSJuri Lelli */ 7261baca4ceSJuri Lelli struct { 7271baca4ceSJuri Lelli u64 curr; 7281baca4ceSJuri Lelli u64 next; 7291baca4ceSJuri Lelli } earliest_dl; 7301baca4ceSJuri Lelli 731e6fe3f42SAlexey Dobriyan unsigned int dl_nr_migratory; 7321baca4ceSJuri Lelli int overloaded; 7331baca4ceSJuri Lelli 7341baca4ceSJuri Lelli /* 7351baca4ceSJuri Lelli * Tasks on this rq that can be pushed away. They are kept in 7361baca4ceSJuri Lelli * an rb-tree, ordered by tasks' deadlines, with caching 7371baca4ceSJuri Lelli * of the leftmost (earliest deadline) element. 7381baca4ceSJuri Lelli */ 7392161573eSDavidlohr Bueso struct rb_root_cached pushable_dl_tasks_root; 740332ac17eSDario Faggioli #else 741332ac17eSDario Faggioli struct dl_bw dl_bw; 7421baca4ceSJuri Lelli #endif 743e36d8677SLuca Abeni /* 744e36d8677SLuca Abeni * "Active utilization" for this runqueue: increased when a 745e36d8677SLuca Abeni * task wakes up (becomes TASK_RUNNING) and decreased when a 746e36d8677SLuca Abeni * task blocks 747e36d8677SLuca Abeni */ 748e36d8677SLuca Abeni u64 running_bw; 7494da3abceSLuca Abeni 7504da3abceSLuca Abeni /* 7518fd27231SLuca Abeni * Utilization of the tasks "assigned" to this runqueue (including 7528fd27231SLuca Abeni * the tasks that are in runqueue and the tasks that executed on this 7538fd27231SLuca Abeni * CPU and blocked). Increased when a task moves to this runqueue, and 7548fd27231SLuca Abeni * decreased when the task moves away (migrates, changes scheduling 7558fd27231SLuca Abeni * policy, or terminates). 7568fd27231SLuca Abeni * This is needed to compute the "inactive utilization" for the 7578fd27231SLuca Abeni * runqueue (inactive utilization = this_bw - running_bw). 7588fd27231SLuca Abeni */ 7598fd27231SLuca Abeni u64 this_bw; 760daec5798SLuca Abeni u64 extra_bw; 7618fd27231SLuca Abeni 7628fd27231SLuca Abeni /* 7634da3abceSLuca Abeni * Inverse of the fraction of CPU utilization that can be reclaimed 7644da3abceSLuca Abeni * by the GRUB algorithm. 7654da3abceSLuca Abeni */ 7664da3abceSLuca Abeni u64 bw_ratio; 767aab03e05SDario Faggioli }; 768aab03e05SDario Faggioli 769c0796298SVincent Guittot #ifdef CONFIG_FAIR_GROUP_SCHED 770c0796298SVincent Guittot /* An entity is a task if it doesn't "own" a runqueue */ 771c0796298SVincent Guittot #define entity_is_task(se) (!se->my_q) 7720dacee1bSVincent Guittot 7739f683953SVincent Guittot static inline void se_update_runnable(struct sched_entity *se) 7749f683953SVincent Guittot { 7759f683953SVincent Guittot if (!entity_is_task(se)) 7769f683953SVincent Guittot se->runnable_weight = se->my_q->h_nr_running; 7779f683953SVincent Guittot } 7789f683953SVincent Guittot 7799f683953SVincent Guittot static inline long se_runnable(struct sched_entity *se) 7809f683953SVincent Guittot { 7819f683953SVincent Guittot if (entity_is_task(se)) 7829f683953SVincent Guittot return !!se->on_rq; 7839f683953SVincent Guittot else 7849f683953SVincent Guittot return se->runnable_weight; 7859f683953SVincent Guittot } 7869f683953SVincent Guittot 787c0796298SVincent Guittot #else 788c0796298SVincent Guittot #define entity_is_task(se) 1 7890dacee1bSVincent Guittot 7909f683953SVincent Guittot static inline void se_update_runnable(struct sched_entity *se) {} 7919f683953SVincent Guittot 7929f683953SVincent Guittot static inline long se_runnable(struct sched_entity *se) 7939f683953SVincent Guittot { 7949f683953SVincent Guittot return !!se->on_rq; 7959f683953SVincent Guittot } 796c0796298SVincent Guittot #endif 797c0796298SVincent Guittot 798391e43daSPeter Zijlstra #ifdef CONFIG_SMP 799c0796298SVincent Guittot /* 800c0796298SVincent Guittot * XXX we want to get rid of these helpers and use the full load resolution. 801c0796298SVincent Guittot */ 802c0796298SVincent Guittot static inline long se_weight(struct sched_entity *se) 803c0796298SVincent Guittot { 804c0796298SVincent Guittot return scale_load_down(se->load.weight); 805c0796298SVincent Guittot } 806c0796298SVincent Guittot 807391e43daSPeter Zijlstra 808afe06efdSTim Chen static inline bool sched_asym_prefer(int a, int b) 809afe06efdSTim Chen { 810afe06efdSTim Chen return arch_asym_cpu_priority(a) > arch_asym_cpu_priority(b); 811afe06efdSTim Chen } 812afe06efdSTim Chen 8136aa140faSQuentin Perret struct perf_domain { 8146aa140faSQuentin Perret struct em_perf_domain *em_pd; 8156aa140faSQuentin Perret struct perf_domain *next; 8166aa140faSQuentin Perret struct rcu_head rcu; 8176aa140faSQuentin Perret }; 8186aa140faSQuentin Perret 819630246a0SQuentin Perret /* Scheduling group status flags */ 820630246a0SQuentin Perret #define SG_OVERLOAD 0x1 /* More than one runnable task on a CPU. */ 8212802bf3cSMorten Rasmussen #define SG_OVERUTILIZED 0x2 /* One or more CPUs are over-utilized. */ 822630246a0SQuentin Perret 823391e43daSPeter Zijlstra /* 824391e43daSPeter Zijlstra * We add the notion of a root-domain which will be used to define per-domain 825391e43daSPeter Zijlstra * variables. Each exclusive cpuset essentially defines an island domain by 82697fb7a0aSIngo Molnar * fully partitioning the member CPUs from any other cpuset. Whenever a new 827391e43daSPeter Zijlstra * exclusive cpuset is created, we also create and attach a new root-domain 828391e43daSPeter Zijlstra * object. 829391e43daSPeter Zijlstra * 830391e43daSPeter Zijlstra */ 831391e43daSPeter Zijlstra struct root_domain { 832391e43daSPeter Zijlstra atomic_t refcount; 833391e43daSPeter Zijlstra atomic_t rto_count; 834391e43daSPeter Zijlstra struct rcu_head rcu; 835391e43daSPeter Zijlstra cpumask_var_t span; 836391e43daSPeter Zijlstra cpumask_var_t online; 837391e43daSPeter Zijlstra 838757ffdd7SValentin Schneider /* 839757ffdd7SValentin Schneider * Indicate pullable load on at least one CPU, e.g: 840757ffdd7SValentin Schneider * - More than one runnable task 841757ffdd7SValentin Schneider * - Running task is misfit 842757ffdd7SValentin Schneider */ 843575638d1SValentin Schneider int overload; 8444486edd1STim Chen 8452802bf3cSMorten Rasmussen /* Indicate one or more cpus over-utilized (tipping point) */ 8462802bf3cSMorten Rasmussen int overutilized; 8472802bf3cSMorten Rasmussen 848391e43daSPeter Zijlstra /* 8491baca4ceSJuri Lelli * The bit corresponding to a CPU gets set here if such CPU has more 8501baca4ceSJuri Lelli * than one runnable -deadline task (as it is below for RT tasks). 8511baca4ceSJuri Lelli */ 8521baca4ceSJuri Lelli cpumask_var_t dlo_mask; 8531baca4ceSJuri Lelli atomic_t dlo_count; 854332ac17eSDario Faggioli struct dl_bw dl_bw; 8556bfd6d72SJuri Lelli struct cpudl cpudl; 8561baca4ceSJuri Lelli 85726762423SPeng Liu /* 85826762423SPeng Liu * Indicate whether a root_domain's dl_bw has been checked or 85926762423SPeng Liu * updated. It's monotonously increasing value. 86026762423SPeng Liu * 86126762423SPeng Liu * Also, some corner cases, like 'wrap around' is dangerous, but given 86226762423SPeng Liu * that u64 is 'big enough'. So that shouldn't be a concern. 86326762423SPeng Liu */ 86426762423SPeng Liu u64 visit_gen; 86526762423SPeng Liu 8664bdced5cSSteven Rostedt (Red Hat) #ifdef HAVE_RT_PUSH_IPI 8674bdced5cSSteven Rostedt (Red Hat) /* 8684bdced5cSSteven Rostedt (Red Hat) * For IPI pull requests, loop across the rto_mask. 8694bdced5cSSteven Rostedt (Red Hat) */ 8704bdced5cSSteven Rostedt (Red Hat) struct irq_work rto_push_work; 8714bdced5cSSteven Rostedt (Red Hat) raw_spinlock_t rto_lock; 8724bdced5cSSteven Rostedt (Red Hat) /* These are only updated and read within rto_lock */ 8734bdced5cSSteven Rostedt (Red Hat) int rto_loop; 8744bdced5cSSteven Rostedt (Red Hat) int rto_cpu; 8754bdced5cSSteven Rostedt (Red Hat) /* These atomics are updated outside of a lock */ 8764bdced5cSSteven Rostedt (Red Hat) atomic_t rto_loop_next; 8774bdced5cSSteven Rostedt (Red Hat) atomic_t rto_loop_start; 8784bdced5cSSteven Rostedt (Red Hat) #endif 8791baca4ceSJuri Lelli /* 880391e43daSPeter Zijlstra * The "RT overload" flag: it gets set if a CPU has more than 881391e43daSPeter Zijlstra * one runnable RT task. 882391e43daSPeter Zijlstra */ 883391e43daSPeter Zijlstra cpumask_var_t rto_mask; 884391e43daSPeter Zijlstra struct cpupri cpupri; 885cd92bfd3SDietmar Eggemann 886cd92bfd3SDietmar Eggemann unsigned long max_cpu_capacity; 8876aa140faSQuentin Perret 8886aa140faSQuentin Perret /* 8896aa140faSQuentin Perret * NULL-terminated list of performance domains intersecting with the 8906aa140faSQuentin Perret * CPUs of the rd. Protected by RCU. 8916aa140faSQuentin Perret */ 8927ba7319fSJoel Fernandes (Google) struct perf_domain __rcu *pd; 893391e43daSPeter Zijlstra }; 894391e43daSPeter Zijlstra 895f2cb1360SIngo Molnar extern void init_defrootdomain(void); 8968d5dc512SPeter Zijlstra extern int sched_init_domains(const struct cpumask *cpu_map); 897f2cb1360SIngo Molnar extern void rq_attach_root(struct rq *rq, struct root_domain *rd); 898364f5665SSteven Rostedt (VMware) extern void sched_get_rd(struct root_domain *rd); 899364f5665SSteven Rostedt (VMware) extern void sched_put_rd(struct root_domain *rd); 900391e43daSPeter Zijlstra 9014bdced5cSSteven Rostedt (Red Hat) #ifdef HAVE_RT_PUSH_IPI 9024bdced5cSSteven Rostedt (Red Hat) extern void rto_push_irq_work_func(struct irq_work *work); 9034bdced5cSSteven Rostedt (Red Hat) #endif 904391e43daSPeter Zijlstra #endif /* CONFIG_SMP */ 905391e43daSPeter Zijlstra 90669842cbaSPatrick Bellasi #ifdef CONFIG_UCLAMP_TASK 90769842cbaSPatrick Bellasi /* 90869842cbaSPatrick Bellasi * struct uclamp_bucket - Utilization clamp bucket 90969842cbaSPatrick Bellasi * @value: utilization clamp value for tasks on this clamp bucket 91069842cbaSPatrick Bellasi * @tasks: number of RUNNABLE tasks on this clamp bucket 91169842cbaSPatrick Bellasi * 91269842cbaSPatrick Bellasi * Keep track of how many tasks are RUNNABLE for a given utilization 91369842cbaSPatrick Bellasi * clamp value. 91469842cbaSPatrick Bellasi */ 91569842cbaSPatrick Bellasi struct uclamp_bucket { 91669842cbaSPatrick Bellasi unsigned long value : bits_per(SCHED_CAPACITY_SCALE); 91769842cbaSPatrick Bellasi unsigned long tasks : BITS_PER_LONG - bits_per(SCHED_CAPACITY_SCALE); 91869842cbaSPatrick Bellasi }; 91969842cbaSPatrick Bellasi 92069842cbaSPatrick Bellasi /* 92169842cbaSPatrick Bellasi * struct uclamp_rq - rq's utilization clamp 92269842cbaSPatrick Bellasi * @value: currently active clamp values for a rq 92369842cbaSPatrick Bellasi * @bucket: utilization clamp buckets affecting a rq 92469842cbaSPatrick Bellasi * 92569842cbaSPatrick Bellasi * Keep track of RUNNABLE tasks on a rq to aggregate their clamp values. 92669842cbaSPatrick Bellasi * A clamp value is affecting a rq when there is at least one task RUNNABLE 92769842cbaSPatrick Bellasi * (or actually running) with that value. 92869842cbaSPatrick Bellasi * 92969842cbaSPatrick Bellasi * There are up to UCLAMP_CNT possible different clamp values, currently there 93069842cbaSPatrick Bellasi * are only two: minimum utilization and maximum utilization. 93169842cbaSPatrick Bellasi * 93269842cbaSPatrick Bellasi * All utilization clamping values are MAX aggregated, since: 93369842cbaSPatrick Bellasi * - for util_min: we want to run the CPU at least at the max of the minimum 93469842cbaSPatrick Bellasi * utilization required by its currently RUNNABLE tasks. 93569842cbaSPatrick Bellasi * - for util_max: we want to allow the CPU to run up to the max of the 93669842cbaSPatrick Bellasi * maximum utilization allowed by its currently RUNNABLE tasks. 93769842cbaSPatrick Bellasi * 93869842cbaSPatrick Bellasi * Since on each system we expect only a limited number of different 93969842cbaSPatrick Bellasi * utilization clamp values (UCLAMP_BUCKETS), use a simple array to track 94069842cbaSPatrick Bellasi * the metrics required to compute all the per-rq utilization clamp values. 94169842cbaSPatrick Bellasi */ 94269842cbaSPatrick Bellasi struct uclamp_rq { 94369842cbaSPatrick Bellasi unsigned int value; 94469842cbaSPatrick Bellasi struct uclamp_bucket bucket[UCLAMP_BUCKETS]; 94569842cbaSPatrick Bellasi }; 94646609ce2SQais Yousef 94746609ce2SQais Yousef DECLARE_STATIC_KEY_FALSE(sched_uclamp_used); 94869842cbaSPatrick Bellasi #endif /* CONFIG_UCLAMP_TASK */ 94969842cbaSPatrick Bellasi 950391e43daSPeter Zijlstra /* 951391e43daSPeter Zijlstra * This is the main, per-CPU runqueue data structure. 952391e43daSPeter Zijlstra * 953391e43daSPeter Zijlstra * Locking rule: those places that want to lock multiple runqueues 954391e43daSPeter Zijlstra * (such as the load balancing or the thread migration code), lock 955391e43daSPeter Zijlstra * acquire operations must be ordered by ascending &runqueue. 956391e43daSPeter Zijlstra */ 957391e43daSPeter Zijlstra struct rq { 958391e43daSPeter Zijlstra /* runqueue lock: */ 9595cb9eaa3SPeter Zijlstra raw_spinlock_t __lock; 960391e43daSPeter Zijlstra 961391e43daSPeter Zijlstra /* 962391e43daSPeter Zijlstra * nr_running and cpu_load should be in the same cacheline because 963391e43daSPeter Zijlstra * remote CPUs use both these fields when doing load calculation. 964391e43daSPeter Zijlstra */ 965c82513e5SPeter Zijlstra unsigned int nr_running; 9660ec8aa00SPeter Zijlstra #ifdef CONFIG_NUMA_BALANCING 9670ec8aa00SPeter Zijlstra unsigned int nr_numa_running; 9680ec8aa00SPeter Zijlstra unsigned int nr_preferred_running; 969a4739ecaSSrikar Dronamraju unsigned int numa_migrate_on; 9700ec8aa00SPeter Zijlstra #endif 9713451d024SFrederic Weisbecker #ifdef CONFIG_NO_HZ_COMMON 9729fd81dd5SFrederic Weisbecker #ifdef CONFIG_SMP 973e022e0d3SPeter Zijlstra unsigned long last_blocked_load_update_tick; 974f643ea22SVincent Guittot unsigned int has_blocked_load; 97590b5363aSPeter Zijlstra (Intel) call_single_data_t nohz_csd; 9769fd81dd5SFrederic Weisbecker #endif /* CONFIG_SMP */ 97700357f5eSPeter Zijlstra unsigned int nohz_tick_stopped; 978a22e47a4SPeter Zijlstra atomic_t nohz_flags; 9799fd81dd5SFrederic Weisbecker #endif /* CONFIG_NO_HZ_COMMON */ 980dcdedb24SFrederic Weisbecker 981126c2092SPeter Zijlstra #ifdef CONFIG_SMP 982126c2092SPeter Zijlstra unsigned int ttwu_pending; 983126c2092SPeter Zijlstra #endif 984391e43daSPeter Zijlstra u64 nr_switches; 985391e43daSPeter Zijlstra 98669842cbaSPatrick Bellasi #ifdef CONFIG_UCLAMP_TASK 98769842cbaSPatrick Bellasi /* Utilization clamp values based on CPU's RUNNABLE tasks */ 98869842cbaSPatrick Bellasi struct uclamp_rq uclamp[UCLAMP_CNT] ____cacheline_aligned; 989e496187dSPatrick Bellasi unsigned int uclamp_flags; 990e496187dSPatrick Bellasi #define UCLAMP_FLAG_IDLE 0x01 99169842cbaSPatrick Bellasi #endif 99269842cbaSPatrick Bellasi 993391e43daSPeter Zijlstra struct cfs_rq cfs; 994391e43daSPeter Zijlstra struct rt_rq rt; 995aab03e05SDario Faggioli struct dl_rq dl; 996391e43daSPeter Zijlstra 997391e43daSPeter Zijlstra #ifdef CONFIG_FAIR_GROUP_SCHED 99897fb7a0aSIngo Molnar /* list of leaf cfs_rq on this CPU: */ 999391e43daSPeter Zijlstra struct list_head leaf_cfs_rq_list; 10009c2791f9SVincent Guittot struct list_head *tmp_alone_branch; 1001a35b6466SPeter Zijlstra #endif /* CONFIG_FAIR_GROUP_SCHED */ 1002a35b6466SPeter Zijlstra 1003391e43daSPeter Zijlstra /* 1004391e43daSPeter Zijlstra * This is part of a global counter where only the total sum 1005391e43daSPeter Zijlstra * over all CPUs matters. A task can increase this counter on 1006391e43daSPeter Zijlstra * one CPU and if it got migrated afterwards it may decrease 1007391e43daSPeter Zijlstra * it on another CPU. Always updated under the runqueue lock: 1008391e43daSPeter Zijlstra */ 1009e6fe3f42SAlexey Dobriyan unsigned int nr_uninterruptible; 1010391e43daSPeter Zijlstra 10114104a562SMadhuparna Bhowmik struct task_struct __rcu *curr; 101297fb7a0aSIngo Molnar struct task_struct *idle; 101397fb7a0aSIngo Molnar struct task_struct *stop; 1014391e43daSPeter Zijlstra unsigned long next_balance; 1015391e43daSPeter Zijlstra struct mm_struct *prev_mm; 1016391e43daSPeter Zijlstra 1017cb42c9a3SMatt Fleming unsigned int clock_update_flags; 1018391e43daSPeter Zijlstra u64 clock; 101923127296SVincent Guittot /* Ensure that all clocks are in the same cache line */ 102023127296SVincent Guittot u64 clock_task ____cacheline_aligned; 102123127296SVincent Guittot u64 clock_pelt; 102223127296SVincent Guittot unsigned long lost_idle_time; 1023391e43daSPeter Zijlstra 1024391e43daSPeter Zijlstra atomic_t nr_iowait; 1025391e43daSPeter Zijlstra 1026c006fac5SPaul Turner #ifdef CONFIG_SCHED_DEBUG 1027c006fac5SPaul Turner u64 last_seen_need_resched_ns; 1028c006fac5SPaul Turner int ticks_without_resched; 1029c006fac5SPaul Turner #endif 1030c006fac5SPaul Turner 1031227a4aadSMathieu Desnoyers #ifdef CONFIG_MEMBARRIER 1032227a4aadSMathieu Desnoyers int membarrier_state; 1033227a4aadSMathieu Desnoyers #endif 1034227a4aadSMathieu Desnoyers 1035391e43daSPeter Zijlstra #ifdef CONFIG_SMP 1036391e43daSPeter Zijlstra struct root_domain *rd; 1037994aeb7aSJoel Fernandes (Google) struct sched_domain __rcu *sd; 1038391e43daSPeter Zijlstra 1039ced549faSNicolas Pitre unsigned long cpu_capacity; 1040ca6d75e6SVincent Guittot unsigned long cpu_capacity_orig; 1041391e43daSPeter Zijlstra 1042e3fca9e7SPeter Zijlstra struct callback_head *balance_callback; 1043e3fca9e7SPeter Zijlstra 104419a1f5ecSPeter Zijlstra unsigned char nohz_idle_balance; 1045391e43daSPeter Zijlstra unsigned char idle_balance; 104697fb7a0aSIngo Molnar 10473b1baa64SMorten Rasmussen unsigned long misfit_task_load; 10483b1baa64SMorten Rasmussen 1049391e43daSPeter Zijlstra /* For active balancing */ 1050391e43daSPeter Zijlstra int active_balance; 1051391e43daSPeter Zijlstra int push_cpu; 1052391e43daSPeter Zijlstra struct cpu_stop_work active_balance_work; 105397fb7a0aSIngo Molnar 105497fb7a0aSIngo Molnar /* CPU of this runqueue: */ 1055391e43daSPeter Zijlstra int cpu; 1056391e43daSPeter Zijlstra int online; 1057391e43daSPeter Zijlstra 1058367456c7SPeter Zijlstra struct list_head cfs_tasks; 1059367456c7SPeter Zijlstra 1060371bf427SVincent Guittot struct sched_avg avg_rt; 10613727e0e1SVincent Guittot struct sched_avg avg_dl; 106211d4afd4SVincent Guittot #ifdef CONFIG_HAVE_SCHED_AVG_IRQ 106391c27493SVincent Guittot struct sched_avg avg_irq; 106491c27493SVincent Guittot #endif 106576504793SThara Gopinath #ifdef CONFIG_SCHED_THERMAL_PRESSURE 106676504793SThara Gopinath struct sched_avg avg_thermal; 106776504793SThara Gopinath #endif 1068391e43daSPeter Zijlstra u64 idle_stamp; 1069391e43daSPeter Zijlstra u64 avg_idle; 10709bd721c5SJason Low 107194aafc3eSPeter Zijlstra unsigned long wake_stamp; 107294aafc3eSPeter Zijlstra u64 wake_avg_idle; 107394aafc3eSPeter Zijlstra 10749bd721c5SJason Low /* This is used to determine avg_idle's max value */ 10759bd721c5SJason Low u64 max_idle_balance_cost; 1076f2469a1fSThomas Gleixner 1077f2469a1fSThomas Gleixner #ifdef CONFIG_HOTPLUG_CPU 1078f2469a1fSThomas Gleixner struct rcuwait hotplug_wait; 1079f2469a1fSThomas Gleixner #endif 108090b5363aSPeter Zijlstra (Intel) #endif /* CONFIG_SMP */ 1081391e43daSPeter Zijlstra 1082391e43daSPeter Zijlstra #ifdef CONFIG_IRQ_TIME_ACCOUNTING 1083391e43daSPeter Zijlstra u64 prev_irq_time; 1084391e43daSPeter Zijlstra #endif 1085391e43daSPeter Zijlstra #ifdef CONFIG_PARAVIRT 1086391e43daSPeter Zijlstra u64 prev_steal_time; 1087391e43daSPeter Zijlstra #endif 1088391e43daSPeter Zijlstra #ifdef CONFIG_PARAVIRT_TIME_ACCOUNTING 1089391e43daSPeter Zijlstra u64 prev_steal_time_rq; 1090391e43daSPeter Zijlstra #endif 1091391e43daSPeter Zijlstra 1092391e43daSPeter Zijlstra /* calc_load related fields */ 1093391e43daSPeter Zijlstra unsigned long calc_load_update; 1094391e43daSPeter Zijlstra long calc_load_active; 1095391e43daSPeter Zijlstra 1096391e43daSPeter Zijlstra #ifdef CONFIG_SCHED_HRTICK 1097391e43daSPeter Zijlstra #ifdef CONFIG_SMP 1098966a9671SYing Huang call_single_data_t hrtick_csd; 1099391e43daSPeter Zijlstra #endif 1100391e43daSPeter Zijlstra struct hrtimer hrtick_timer; 1101156ec6f4SJuri Lelli ktime_t hrtick_time; 1102391e43daSPeter Zijlstra #endif 1103391e43daSPeter Zijlstra 1104391e43daSPeter Zijlstra #ifdef CONFIG_SCHEDSTATS 1105391e43daSPeter Zijlstra /* latency stats */ 1106391e43daSPeter Zijlstra struct sched_info rq_sched_info; 1107391e43daSPeter Zijlstra unsigned long long rq_cpu_time; 1108391e43daSPeter Zijlstra /* could above be rq->cfs_rq.exec_clock + rq->rt_rq.rt_runtime ? */ 1109391e43daSPeter Zijlstra 1110391e43daSPeter Zijlstra /* sys_sched_yield() stats */ 1111391e43daSPeter Zijlstra unsigned int yld_count; 1112391e43daSPeter Zijlstra 1113391e43daSPeter Zijlstra /* schedule() stats */ 1114391e43daSPeter Zijlstra unsigned int sched_count; 1115391e43daSPeter Zijlstra unsigned int sched_goidle; 1116391e43daSPeter Zijlstra 1117391e43daSPeter Zijlstra /* try_to_wake_up() stats */ 1118391e43daSPeter Zijlstra unsigned int ttwu_count; 1119391e43daSPeter Zijlstra unsigned int ttwu_local; 1120391e43daSPeter Zijlstra #endif 1121391e43daSPeter Zijlstra 1122442bf3aaSDaniel Lezcano #ifdef CONFIG_CPU_IDLE 1123442bf3aaSDaniel Lezcano /* Must be inspected within a rcu lock section */ 1124442bf3aaSDaniel Lezcano struct cpuidle_state *idle_state; 1125442bf3aaSDaniel Lezcano #endif 11263015ef4bSThomas Gleixner 112774d862b6SThomas Gleixner #ifdef CONFIG_SMP 11283015ef4bSThomas Gleixner unsigned int nr_pinned; 11293015ef4bSThomas Gleixner #endif 1130a7c81556SPeter Zijlstra unsigned int push_busy; 1131a7c81556SPeter Zijlstra struct cpu_stop_work push_work; 11329edeaea1SPeter Zijlstra 11339edeaea1SPeter Zijlstra #ifdef CONFIG_SCHED_CORE 11349edeaea1SPeter Zijlstra /* per rq */ 11359edeaea1SPeter Zijlstra struct rq *core; 1136539f6512SPeter Zijlstra struct task_struct *core_pick; 11379edeaea1SPeter Zijlstra unsigned int core_enabled; 1138539f6512SPeter Zijlstra unsigned int core_sched_seq; 11398a311c74SPeter Zijlstra struct rb_root core_tree; 11408a311c74SPeter Zijlstra 11413c474b32SPeter Zijlstra /* shared state -- careful with sched_core_cpu_deactivate() */ 11428a311c74SPeter Zijlstra unsigned int core_task_seq; 1143539f6512SPeter Zijlstra unsigned int core_pick_seq; 1144539f6512SPeter Zijlstra unsigned long core_cookie; 11454feee7d1SJosh Don unsigned int core_forceidle_count; 1146c6047c2eSJoel Fernandes (Google) unsigned int core_forceidle_seq; 11474feee7d1SJosh Don unsigned int core_forceidle_occupation; 11484feee7d1SJosh Don u64 core_forceidle_start; 11499edeaea1SPeter Zijlstra #endif 1150391e43daSPeter Zijlstra }; 1151391e43daSPeter Zijlstra 115262478d99SVincent Guittot #ifdef CONFIG_FAIR_GROUP_SCHED 115362478d99SVincent Guittot 115462478d99SVincent Guittot /* CPU runqueue to which this cfs_rq is attached */ 115562478d99SVincent Guittot static inline struct rq *rq_of(struct cfs_rq *cfs_rq) 115662478d99SVincent Guittot { 115762478d99SVincent Guittot return cfs_rq->rq; 115862478d99SVincent Guittot } 115962478d99SVincent Guittot 116062478d99SVincent Guittot #else 116162478d99SVincent Guittot 116262478d99SVincent Guittot static inline struct rq *rq_of(struct cfs_rq *cfs_rq) 116362478d99SVincent Guittot { 116462478d99SVincent Guittot return container_of(cfs_rq, struct rq, cfs); 116562478d99SVincent Guittot } 116662478d99SVincent Guittot #endif 116762478d99SVincent Guittot 1168391e43daSPeter Zijlstra static inline int cpu_of(struct rq *rq) 1169391e43daSPeter Zijlstra { 1170391e43daSPeter Zijlstra #ifdef CONFIG_SMP 1171391e43daSPeter Zijlstra return rq->cpu; 1172391e43daSPeter Zijlstra #else 1173391e43daSPeter Zijlstra return 0; 1174391e43daSPeter Zijlstra #endif 1175391e43daSPeter Zijlstra } 1176391e43daSPeter Zijlstra 1177a7c81556SPeter Zijlstra #define MDF_PUSH 0x01 1178a7c81556SPeter Zijlstra 1179a7c81556SPeter Zijlstra static inline bool is_migration_disabled(struct task_struct *p) 1180a7c81556SPeter Zijlstra { 118174d862b6SThomas Gleixner #ifdef CONFIG_SMP 1182a7c81556SPeter Zijlstra return p->migration_disabled; 1183a7c81556SPeter Zijlstra #else 1184a7c81556SPeter Zijlstra return false; 1185a7c81556SPeter Zijlstra #endif 1186a7c81556SPeter Zijlstra } 11871b568f0aSPeter Zijlstra 118897886d9dSAubrey Li struct sched_group; 11899edeaea1SPeter Zijlstra #ifdef CONFIG_SCHED_CORE 119097886d9dSAubrey Li static inline struct cpumask *sched_group_span(struct sched_group *sg); 11919edeaea1SPeter Zijlstra 11929edeaea1SPeter Zijlstra DECLARE_STATIC_KEY_FALSE(__sched_core_enabled); 11939edeaea1SPeter Zijlstra 11949edeaea1SPeter Zijlstra static inline bool sched_core_enabled(struct rq *rq) 11959edeaea1SPeter Zijlstra { 11969edeaea1SPeter Zijlstra return static_branch_unlikely(&__sched_core_enabled) && rq->core_enabled; 11979edeaea1SPeter Zijlstra } 11989edeaea1SPeter Zijlstra 11999edeaea1SPeter Zijlstra static inline bool sched_core_disabled(void) 12009edeaea1SPeter Zijlstra { 12019edeaea1SPeter Zijlstra return !static_branch_unlikely(&__sched_core_enabled); 12029edeaea1SPeter Zijlstra } 12039edeaea1SPeter Zijlstra 12049ef7e7e3SPeter Zijlstra /* 12059ef7e7e3SPeter Zijlstra * Be careful with this function; not for general use. The return value isn't 12069ef7e7e3SPeter Zijlstra * stable unless you actually hold a relevant rq->__lock. 12079ef7e7e3SPeter Zijlstra */ 12089edeaea1SPeter Zijlstra static inline raw_spinlock_t *rq_lockp(struct rq *rq) 12099edeaea1SPeter Zijlstra { 12109edeaea1SPeter Zijlstra if (sched_core_enabled(rq)) 12119edeaea1SPeter Zijlstra return &rq->core->__lock; 12129edeaea1SPeter Zijlstra 12139edeaea1SPeter Zijlstra return &rq->__lock; 12149edeaea1SPeter Zijlstra } 12159edeaea1SPeter Zijlstra 12169ef7e7e3SPeter Zijlstra static inline raw_spinlock_t *__rq_lockp(struct rq *rq) 12179ef7e7e3SPeter Zijlstra { 12189ef7e7e3SPeter Zijlstra if (rq->core_enabled) 12199ef7e7e3SPeter Zijlstra return &rq->core->__lock; 12209ef7e7e3SPeter Zijlstra 12219ef7e7e3SPeter Zijlstra return &rq->__lock; 12229ef7e7e3SPeter Zijlstra } 12239ef7e7e3SPeter Zijlstra 1224c6047c2eSJoel Fernandes (Google) bool cfs_prio_less(struct task_struct *a, struct task_struct *b, bool fi); 1225c6047c2eSJoel Fernandes (Google) 122697886d9dSAubrey Li /* 122797886d9dSAubrey Li * Helpers to check if the CPU's core cookie matches with the task's cookie 122897886d9dSAubrey Li * when core scheduling is enabled. 122997886d9dSAubrey Li * A special case is that the task's cookie always matches with CPU's core 123097886d9dSAubrey Li * cookie if the CPU is in an idle core. 123197886d9dSAubrey Li */ 123297886d9dSAubrey Li static inline bool sched_cpu_cookie_match(struct rq *rq, struct task_struct *p) 123397886d9dSAubrey Li { 123497886d9dSAubrey Li /* Ignore cookie match if core scheduler is not enabled on the CPU. */ 123597886d9dSAubrey Li if (!sched_core_enabled(rq)) 123697886d9dSAubrey Li return true; 123797886d9dSAubrey Li 123897886d9dSAubrey Li return rq->core->core_cookie == p->core_cookie; 123997886d9dSAubrey Li } 124097886d9dSAubrey Li 124197886d9dSAubrey Li static inline bool sched_core_cookie_match(struct rq *rq, struct task_struct *p) 124297886d9dSAubrey Li { 124397886d9dSAubrey Li bool idle_core = true; 124497886d9dSAubrey Li int cpu; 124597886d9dSAubrey Li 124697886d9dSAubrey Li /* Ignore cookie match if core scheduler is not enabled on the CPU. */ 124797886d9dSAubrey Li if (!sched_core_enabled(rq)) 124897886d9dSAubrey Li return true; 124997886d9dSAubrey Li 125097886d9dSAubrey Li for_each_cpu(cpu, cpu_smt_mask(cpu_of(rq))) { 125197886d9dSAubrey Li if (!available_idle_cpu(cpu)) { 125297886d9dSAubrey Li idle_core = false; 125397886d9dSAubrey Li break; 125497886d9dSAubrey Li } 125597886d9dSAubrey Li } 125697886d9dSAubrey Li 125797886d9dSAubrey Li /* 125897886d9dSAubrey Li * A CPU in an idle core is always the best choice for tasks with 125997886d9dSAubrey Li * cookies. 126097886d9dSAubrey Li */ 126197886d9dSAubrey Li return idle_core || rq->core->core_cookie == p->core_cookie; 126297886d9dSAubrey Li } 126397886d9dSAubrey Li 126497886d9dSAubrey Li static inline bool sched_group_cookie_match(struct rq *rq, 126597886d9dSAubrey Li struct task_struct *p, 126697886d9dSAubrey Li struct sched_group *group) 126797886d9dSAubrey Li { 126897886d9dSAubrey Li int cpu; 126997886d9dSAubrey Li 127097886d9dSAubrey Li /* Ignore cookie match if core scheduler is not enabled on the CPU. */ 127197886d9dSAubrey Li if (!sched_core_enabled(rq)) 127297886d9dSAubrey Li return true; 127397886d9dSAubrey Li 127497886d9dSAubrey Li for_each_cpu_and(cpu, sched_group_span(group), p->cpus_ptr) { 127597886d9dSAubrey Li if (sched_core_cookie_match(rq, p)) 127697886d9dSAubrey Li return true; 127797886d9dSAubrey Li } 127897886d9dSAubrey Li return false; 127997886d9dSAubrey Li } 128097886d9dSAubrey Li 12816e33cad0SPeter Zijlstra static inline bool sched_core_enqueued(struct task_struct *p) 12826e33cad0SPeter Zijlstra { 12836e33cad0SPeter Zijlstra return !RB_EMPTY_NODE(&p->core_node); 12846e33cad0SPeter Zijlstra } 12856e33cad0SPeter Zijlstra 12866e33cad0SPeter Zijlstra extern void sched_core_enqueue(struct rq *rq, struct task_struct *p); 12874feee7d1SJosh Don extern void sched_core_dequeue(struct rq *rq, struct task_struct *p, int flags); 12886e33cad0SPeter Zijlstra 12896e33cad0SPeter Zijlstra extern void sched_core_get(void); 12906e33cad0SPeter Zijlstra extern void sched_core_put(void); 12916e33cad0SPeter Zijlstra 12929edeaea1SPeter Zijlstra #else /* !CONFIG_SCHED_CORE */ 12939edeaea1SPeter Zijlstra 12949edeaea1SPeter Zijlstra static inline bool sched_core_enabled(struct rq *rq) 12959edeaea1SPeter Zijlstra { 12969edeaea1SPeter Zijlstra return false; 12979edeaea1SPeter Zijlstra } 12989edeaea1SPeter Zijlstra 1299d66f1b06SPeter Zijlstra static inline bool sched_core_disabled(void) 1300d66f1b06SPeter Zijlstra { 1301d66f1b06SPeter Zijlstra return true; 1302d66f1b06SPeter Zijlstra } 1303d66f1b06SPeter Zijlstra 130439d371b7SPeter Zijlstra static inline raw_spinlock_t *rq_lockp(struct rq *rq) 130539d371b7SPeter Zijlstra { 13065cb9eaa3SPeter Zijlstra return &rq->__lock; 130739d371b7SPeter Zijlstra } 130839d371b7SPeter Zijlstra 13099ef7e7e3SPeter Zijlstra static inline raw_spinlock_t *__rq_lockp(struct rq *rq) 13109ef7e7e3SPeter Zijlstra { 13119ef7e7e3SPeter Zijlstra return &rq->__lock; 13129ef7e7e3SPeter Zijlstra } 13139ef7e7e3SPeter Zijlstra 131497886d9dSAubrey Li static inline bool sched_cpu_cookie_match(struct rq *rq, struct task_struct *p) 131597886d9dSAubrey Li { 131697886d9dSAubrey Li return true; 131797886d9dSAubrey Li } 131897886d9dSAubrey Li 131997886d9dSAubrey Li static inline bool sched_core_cookie_match(struct rq *rq, struct task_struct *p) 132097886d9dSAubrey Li { 132197886d9dSAubrey Li return true; 132297886d9dSAubrey Li } 132397886d9dSAubrey Li 132497886d9dSAubrey Li static inline bool sched_group_cookie_match(struct rq *rq, 132597886d9dSAubrey Li struct task_struct *p, 132697886d9dSAubrey Li struct sched_group *group) 132797886d9dSAubrey Li { 132897886d9dSAubrey Li return true; 132997886d9dSAubrey Li } 13309edeaea1SPeter Zijlstra #endif /* CONFIG_SCHED_CORE */ 13319edeaea1SPeter Zijlstra 133239d371b7SPeter Zijlstra static inline void lockdep_assert_rq_held(struct rq *rq) 133339d371b7SPeter Zijlstra { 13349ef7e7e3SPeter Zijlstra lockdep_assert_held(__rq_lockp(rq)); 133539d371b7SPeter Zijlstra } 133639d371b7SPeter Zijlstra 133739d371b7SPeter Zijlstra extern void raw_spin_rq_lock_nested(struct rq *rq, int subclass); 133839d371b7SPeter Zijlstra extern bool raw_spin_rq_trylock(struct rq *rq); 133939d371b7SPeter Zijlstra extern void raw_spin_rq_unlock(struct rq *rq); 134039d371b7SPeter Zijlstra 134139d371b7SPeter Zijlstra static inline void raw_spin_rq_lock(struct rq *rq) 134239d371b7SPeter Zijlstra { 134339d371b7SPeter Zijlstra raw_spin_rq_lock_nested(rq, 0); 134439d371b7SPeter Zijlstra } 134539d371b7SPeter Zijlstra 134639d371b7SPeter Zijlstra static inline void raw_spin_rq_lock_irq(struct rq *rq) 134739d371b7SPeter Zijlstra { 134839d371b7SPeter Zijlstra local_irq_disable(); 134939d371b7SPeter Zijlstra raw_spin_rq_lock(rq); 135039d371b7SPeter Zijlstra } 135139d371b7SPeter Zijlstra 135239d371b7SPeter Zijlstra static inline void raw_spin_rq_unlock_irq(struct rq *rq) 135339d371b7SPeter Zijlstra { 135439d371b7SPeter Zijlstra raw_spin_rq_unlock(rq); 135539d371b7SPeter Zijlstra local_irq_enable(); 135639d371b7SPeter Zijlstra } 135739d371b7SPeter Zijlstra 135839d371b7SPeter Zijlstra static inline unsigned long _raw_spin_rq_lock_irqsave(struct rq *rq) 135939d371b7SPeter Zijlstra { 136039d371b7SPeter Zijlstra unsigned long flags; 136139d371b7SPeter Zijlstra local_irq_save(flags); 136239d371b7SPeter Zijlstra raw_spin_rq_lock(rq); 136339d371b7SPeter Zijlstra return flags; 136439d371b7SPeter Zijlstra } 136539d371b7SPeter Zijlstra 136639d371b7SPeter Zijlstra static inline void raw_spin_rq_unlock_irqrestore(struct rq *rq, unsigned long flags) 136739d371b7SPeter Zijlstra { 136839d371b7SPeter Zijlstra raw_spin_rq_unlock(rq); 136939d371b7SPeter Zijlstra local_irq_restore(flags); 137039d371b7SPeter Zijlstra } 137139d371b7SPeter Zijlstra 137239d371b7SPeter Zijlstra #define raw_spin_rq_lock_irqsave(rq, flags) \ 137339d371b7SPeter Zijlstra do { \ 137439d371b7SPeter Zijlstra flags = _raw_spin_rq_lock_irqsave(rq); \ 137539d371b7SPeter Zijlstra } while (0) 137639d371b7SPeter Zijlstra 13771b568f0aSPeter Zijlstra #ifdef CONFIG_SCHED_SMT 13781b568f0aSPeter Zijlstra extern void __update_idle_core(struct rq *rq); 13791b568f0aSPeter Zijlstra 13801b568f0aSPeter Zijlstra static inline void update_idle_core(struct rq *rq) 13811b568f0aSPeter Zijlstra { 13821b568f0aSPeter Zijlstra if (static_branch_unlikely(&sched_smt_present)) 13831b568f0aSPeter Zijlstra __update_idle_core(rq); 13841b568f0aSPeter Zijlstra } 13851b568f0aSPeter Zijlstra 13861b568f0aSPeter Zijlstra #else 13871b568f0aSPeter Zijlstra static inline void update_idle_core(struct rq *rq) { } 13881b568f0aSPeter Zijlstra #endif 13891b568f0aSPeter Zijlstra 13908b06c55bSPranith Kumar DECLARE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); 1391391e43daSPeter Zijlstra 1392518cd623SPeter Zijlstra #define cpu_rq(cpu) (&per_cpu(runqueues, (cpu))) 13934a32fea9SChristoph Lameter #define this_rq() this_cpu_ptr(&runqueues) 1394518cd623SPeter Zijlstra #define task_rq(p) cpu_rq(task_cpu(p)) 1395518cd623SPeter Zijlstra #define cpu_curr(cpu) (cpu_rq(cpu)->curr) 13964a32fea9SChristoph Lameter #define raw_rq() raw_cpu_ptr(&runqueues) 1397518cd623SPeter Zijlstra 13988a311c74SPeter Zijlstra #ifdef CONFIG_FAIR_GROUP_SCHED 13998a311c74SPeter Zijlstra static inline struct task_struct *task_of(struct sched_entity *se) 14008a311c74SPeter Zijlstra { 14018a311c74SPeter Zijlstra SCHED_WARN_ON(!entity_is_task(se)); 14028a311c74SPeter Zijlstra return container_of(se, struct task_struct, se); 14038a311c74SPeter Zijlstra } 14048a311c74SPeter Zijlstra 14058a311c74SPeter Zijlstra static inline struct cfs_rq *task_cfs_rq(struct task_struct *p) 14068a311c74SPeter Zijlstra { 14078a311c74SPeter Zijlstra return p->se.cfs_rq; 14088a311c74SPeter Zijlstra } 14098a311c74SPeter Zijlstra 14108a311c74SPeter Zijlstra /* runqueue on which this entity is (to be) queued */ 14118a311c74SPeter Zijlstra static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se) 14128a311c74SPeter Zijlstra { 14138a311c74SPeter Zijlstra return se->cfs_rq; 14148a311c74SPeter Zijlstra } 14158a311c74SPeter Zijlstra 14168a311c74SPeter Zijlstra /* runqueue "owned" by this group */ 14178a311c74SPeter Zijlstra static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp) 14188a311c74SPeter Zijlstra { 14198a311c74SPeter Zijlstra return grp->my_q; 14208a311c74SPeter Zijlstra } 14218a311c74SPeter Zijlstra 14228a311c74SPeter Zijlstra #else 14238a311c74SPeter Zijlstra 14248a311c74SPeter Zijlstra static inline struct task_struct *task_of(struct sched_entity *se) 14258a311c74SPeter Zijlstra { 14268a311c74SPeter Zijlstra return container_of(se, struct task_struct, se); 14278a311c74SPeter Zijlstra } 14288a311c74SPeter Zijlstra 14298a311c74SPeter Zijlstra static inline struct cfs_rq *task_cfs_rq(struct task_struct *p) 14308a311c74SPeter Zijlstra { 14318a311c74SPeter Zijlstra return &task_rq(p)->cfs; 14328a311c74SPeter Zijlstra } 14338a311c74SPeter Zijlstra 14348a311c74SPeter Zijlstra static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se) 14358a311c74SPeter Zijlstra { 14368a311c74SPeter Zijlstra struct task_struct *p = task_of(se); 14378a311c74SPeter Zijlstra struct rq *rq = task_rq(p); 14388a311c74SPeter Zijlstra 14398a311c74SPeter Zijlstra return &rq->cfs; 14408a311c74SPeter Zijlstra } 14418a311c74SPeter Zijlstra 14428a311c74SPeter Zijlstra /* runqueue "owned" by this group */ 14438a311c74SPeter Zijlstra static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp) 14448a311c74SPeter Zijlstra { 14458a311c74SPeter Zijlstra return NULL; 14468a311c74SPeter Zijlstra } 14478a311c74SPeter Zijlstra #endif 14488a311c74SPeter Zijlstra 14491f351d7fSJohannes Weiner extern void update_rq_clock(struct rq *rq); 14501f351d7fSJohannes Weiner 1451cb42c9a3SMatt Fleming /* 1452cb42c9a3SMatt Fleming * rq::clock_update_flags bits 1453cb42c9a3SMatt Fleming * 1454cb42c9a3SMatt Fleming * %RQCF_REQ_SKIP - will request skipping of clock update on the next 1455cb42c9a3SMatt Fleming * call to __schedule(). This is an optimisation to avoid 1456cb42c9a3SMatt Fleming * neighbouring rq clock updates. 1457cb42c9a3SMatt Fleming * 1458cb42c9a3SMatt Fleming * %RQCF_ACT_SKIP - is set from inside of __schedule() when skipping is 1459cb42c9a3SMatt Fleming * in effect and calls to update_rq_clock() are being ignored. 1460cb42c9a3SMatt Fleming * 1461cb42c9a3SMatt Fleming * %RQCF_UPDATED - is a debug flag that indicates whether a call has been 1462cb42c9a3SMatt Fleming * made to update_rq_clock() since the last time rq::lock was pinned. 1463cb42c9a3SMatt Fleming * 1464cb42c9a3SMatt Fleming * If inside of __schedule(), clock_update_flags will have been 1465cb42c9a3SMatt Fleming * shifted left (a left shift is a cheap operation for the fast path 1466cb42c9a3SMatt Fleming * to promote %RQCF_REQ_SKIP to %RQCF_ACT_SKIP), so you must use, 1467cb42c9a3SMatt Fleming * 1468cb42c9a3SMatt Fleming * if (rq-clock_update_flags >= RQCF_UPDATED) 1469cb42c9a3SMatt Fleming * 14703b03706fSIngo Molnar * to check if %RQCF_UPDATED is set. It'll never be shifted more than 1471cb42c9a3SMatt Fleming * one position though, because the next rq_unpin_lock() will shift it 1472cb42c9a3SMatt Fleming * back. 1473cb42c9a3SMatt Fleming */ 1474cb42c9a3SMatt Fleming #define RQCF_REQ_SKIP 0x01 1475cb42c9a3SMatt Fleming #define RQCF_ACT_SKIP 0x02 1476cb42c9a3SMatt Fleming #define RQCF_UPDATED 0x04 1477cb42c9a3SMatt Fleming 1478cb42c9a3SMatt Fleming static inline void assert_clock_updated(struct rq *rq) 1479cb42c9a3SMatt Fleming { 1480cb42c9a3SMatt Fleming /* 1481cb42c9a3SMatt Fleming * The only reason for not seeing a clock update since the 1482cb42c9a3SMatt Fleming * last rq_pin_lock() is if we're currently skipping updates. 1483cb42c9a3SMatt Fleming */ 1484cb42c9a3SMatt Fleming SCHED_WARN_ON(rq->clock_update_flags < RQCF_ACT_SKIP); 1485cb42c9a3SMatt Fleming } 1486cb42c9a3SMatt Fleming 148778becc27SFrederic Weisbecker static inline u64 rq_clock(struct rq *rq) 148878becc27SFrederic Weisbecker { 14895cb9eaa3SPeter Zijlstra lockdep_assert_rq_held(rq); 1490cb42c9a3SMatt Fleming assert_clock_updated(rq); 1491cb42c9a3SMatt Fleming 149278becc27SFrederic Weisbecker return rq->clock; 149378becc27SFrederic Weisbecker } 149478becc27SFrederic Weisbecker 149578becc27SFrederic Weisbecker static inline u64 rq_clock_task(struct rq *rq) 149678becc27SFrederic Weisbecker { 14975cb9eaa3SPeter Zijlstra lockdep_assert_rq_held(rq); 1498cb42c9a3SMatt Fleming assert_clock_updated(rq); 1499cb42c9a3SMatt Fleming 150078becc27SFrederic Weisbecker return rq->clock_task; 150178becc27SFrederic Weisbecker } 150278becc27SFrederic Weisbecker 150305289b90SThara Gopinath /** 150405289b90SThara Gopinath * By default the decay is the default pelt decay period. 150505289b90SThara Gopinath * The decay shift can change the decay period in 150605289b90SThara Gopinath * multiples of 32. 150705289b90SThara Gopinath * Decay shift Decay period(ms) 150805289b90SThara Gopinath * 0 32 150905289b90SThara Gopinath * 1 64 151005289b90SThara Gopinath * 2 128 151105289b90SThara Gopinath * 3 256 151205289b90SThara Gopinath * 4 512 151305289b90SThara Gopinath */ 151405289b90SThara Gopinath extern int sched_thermal_decay_shift; 151505289b90SThara Gopinath 151605289b90SThara Gopinath static inline u64 rq_clock_thermal(struct rq *rq) 151705289b90SThara Gopinath { 151805289b90SThara Gopinath return rq_clock_task(rq) >> sched_thermal_decay_shift; 151905289b90SThara Gopinath } 152005289b90SThara Gopinath 1521adcc8da8SDavidlohr Bueso static inline void rq_clock_skip_update(struct rq *rq) 15229edfbfedSPeter Zijlstra { 15235cb9eaa3SPeter Zijlstra lockdep_assert_rq_held(rq); 1524cb42c9a3SMatt Fleming rq->clock_update_flags |= RQCF_REQ_SKIP; 1525adcc8da8SDavidlohr Bueso } 1526adcc8da8SDavidlohr Bueso 1527adcc8da8SDavidlohr Bueso /* 1528595058b6SDavidlohr Bueso * See rt task throttling, which is the only time a skip 15293b03706fSIngo Molnar * request is canceled. 1530adcc8da8SDavidlohr Bueso */ 1531adcc8da8SDavidlohr Bueso static inline void rq_clock_cancel_skipupdate(struct rq *rq) 1532adcc8da8SDavidlohr Bueso { 15335cb9eaa3SPeter Zijlstra lockdep_assert_rq_held(rq); 1534cb42c9a3SMatt Fleming rq->clock_update_flags &= ~RQCF_REQ_SKIP; 15359edfbfedSPeter Zijlstra } 15369edfbfedSPeter Zijlstra 1537d8ac8971SMatt Fleming struct rq_flags { 1538d8ac8971SMatt Fleming unsigned long flags; 1539d8ac8971SMatt Fleming struct pin_cookie cookie; 1540cb42c9a3SMatt Fleming #ifdef CONFIG_SCHED_DEBUG 1541cb42c9a3SMatt Fleming /* 1542cb42c9a3SMatt Fleming * A copy of (rq::clock_update_flags & RQCF_UPDATED) for the 1543cb42c9a3SMatt Fleming * current pin context is stashed here in case it needs to be 1544cb42c9a3SMatt Fleming * restored in rq_repin_lock(). 1545cb42c9a3SMatt Fleming */ 1546cb42c9a3SMatt Fleming unsigned int clock_update_flags; 1547cb42c9a3SMatt Fleming #endif 1548d8ac8971SMatt Fleming }; 1549d8ac8971SMatt Fleming 1550ae792702SPeter Zijlstra extern struct callback_head balance_push_callback; 1551ae792702SPeter Zijlstra 155258877d34SPeter Zijlstra /* 155358877d34SPeter Zijlstra * Lockdep annotation that avoids accidental unlocks; it's like a 155458877d34SPeter Zijlstra * sticky/continuous lockdep_assert_held(). 155558877d34SPeter Zijlstra * 155658877d34SPeter Zijlstra * This avoids code that has access to 'struct rq *rq' (basically everything in 155758877d34SPeter Zijlstra * the scheduler) from accidentally unlocking the rq if they do not also have a 155858877d34SPeter Zijlstra * copy of the (on-stack) 'struct rq_flags rf'. 155958877d34SPeter Zijlstra * 156058877d34SPeter Zijlstra * Also see Documentation/locking/lockdep-design.rst. 156158877d34SPeter Zijlstra */ 1562d8ac8971SMatt Fleming static inline void rq_pin_lock(struct rq *rq, struct rq_flags *rf) 1563d8ac8971SMatt Fleming { 15649ef7e7e3SPeter Zijlstra rf->cookie = lockdep_pin_lock(__rq_lockp(rq)); 1565cb42c9a3SMatt Fleming 1566cb42c9a3SMatt Fleming #ifdef CONFIG_SCHED_DEBUG 1567cb42c9a3SMatt Fleming rq->clock_update_flags &= (RQCF_REQ_SKIP|RQCF_ACT_SKIP); 1568cb42c9a3SMatt Fleming rf->clock_update_flags = 0; 1569565790d2SPeter Zijlstra #ifdef CONFIG_SMP 1570ae792702SPeter Zijlstra SCHED_WARN_ON(rq->balance_callback && rq->balance_callback != &balance_push_callback); 1571ae792702SPeter Zijlstra #endif 1572565790d2SPeter Zijlstra #endif 1573d8ac8971SMatt Fleming } 1574d8ac8971SMatt Fleming 1575d8ac8971SMatt Fleming static inline void rq_unpin_lock(struct rq *rq, struct rq_flags *rf) 1576d8ac8971SMatt Fleming { 1577cb42c9a3SMatt Fleming #ifdef CONFIG_SCHED_DEBUG 1578cb42c9a3SMatt Fleming if (rq->clock_update_flags > RQCF_ACT_SKIP) 1579cb42c9a3SMatt Fleming rf->clock_update_flags = RQCF_UPDATED; 1580cb42c9a3SMatt Fleming #endif 1581cb42c9a3SMatt Fleming 15829ef7e7e3SPeter Zijlstra lockdep_unpin_lock(__rq_lockp(rq), rf->cookie); 1583d8ac8971SMatt Fleming } 1584d8ac8971SMatt Fleming 1585d8ac8971SMatt Fleming static inline void rq_repin_lock(struct rq *rq, struct rq_flags *rf) 1586d8ac8971SMatt Fleming { 15879ef7e7e3SPeter Zijlstra lockdep_repin_lock(__rq_lockp(rq), rf->cookie); 1588cb42c9a3SMatt Fleming 1589cb42c9a3SMatt Fleming #ifdef CONFIG_SCHED_DEBUG 1590cb42c9a3SMatt Fleming /* 1591cb42c9a3SMatt Fleming * Restore the value we stashed in @rf for this pin context. 1592cb42c9a3SMatt Fleming */ 1593cb42c9a3SMatt Fleming rq->clock_update_flags |= rf->clock_update_flags; 1594cb42c9a3SMatt Fleming #endif 1595d8ac8971SMatt Fleming } 1596d8ac8971SMatt Fleming 15971f351d7fSJohannes Weiner struct rq *__task_rq_lock(struct task_struct *p, struct rq_flags *rf) 15981f351d7fSJohannes Weiner __acquires(rq->lock); 15991f351d7fSJohannes Weiner 16001f351d7fSJohannes Weiner struct rq *task_rq_lock(struct task_struct *p, struct rq_flags *rf) 16011f351d7fSJohannes Weiner __acquires(p->pi_lock) 16021f351d7fSJohannes Weiner __acquires(rq->lock); 16031f351d7fSJohannes Weiner 16041f351d7fSJohannes Weiner static inline void __task_rq_unlock(struct rq *rq, struct rq_flags *rf) 16051f351d7fSJohannes Weiner __releases(rq->lock) 16061f351d7fSJohannes Weiner { 16071f351d7fSJohannes Weiner rq_unpin_lock(rq, rf); 16085cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(rq); 16091f351d7fSJohannes Weiner } 16101f351d7fSJohannes Weiner 16111f351d7fSJohannes Weiner static inline void 16121f351d7fSJohannes Weiner task_rq_unlock(struct rq *rq, struct task_struct *p, struct rq_flags *rf) 16131f351d7fSJohannes Weiner __releases(rq->lock) 16141f351d7fSJohannes Weiner __releases(p->pi_lock) 16151f351d7fSJohannes Weiner { 16161f351d7fSJohannes Weiner rq_unpin_lock(rq, rf); 16175cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(rq); 16181f351d7fSJohannes Weiner raw_spin_unlock_irqrestore(&p->pi_lock, rf->flags); 16191f351d7fSJohannes Weiner } 16201f351d7fSJohannes Weiner 16211f351d7fSJohannes Weiner static inline void 16221f351d7fSJohannes Weiner rq_lock_irqsave(struct rq *rq, struct rq_flags *rf) 16231f351d7fSJohannes Weiner __acquires(rq->lock) 16241f351d7fSJohannes Weiner { 16255cb9eaa3SPeter Zijlstra raw_spin_rq_lock_irqsave(rq, rf->flags); 16261f351d7fSJohannes Weiner rq_pin_lock(rq, rf); 16271f351d7fSJohannes Weiner } 16281f351d7fSJohannes Weiner 16291f351d7fSJohannes Weiner static inline void 16301f351d7fSJohannes Weiner rq_lock_irq(struct rq *rq, struct rq_flags *rf) 16311f351d7fSJohannes Weiner __acquires(rq->lock) 16321f351d7fSJohannes Weiner { 16335cb9eaa3SPeter Zijlstra raw_spin_rq_lock_irq(rq); 16341f351d7fSJohannes Weiner rq_pin_lock(rq, rf); 16351f351d7fSJohannes Weiner } 16361f351d7fSJohannes Weiner 16371f351d7fSJohannes Weiner static inline void 16381f351d7fSJohannes Weiner rq_lock(struct rq *rq, struct rq_flags *rf) 16391f351d7fSJohannes Weiner __acquires(rq->lock) 16401f351d7fSJohannes Weiner { 16415cb9eaa3SPeter Zijlstra raw_spin_rq_lock(rq); 16421f351d7fSJohannes Weiner rq_pin_lock(rq, rf); 16431f351d7fSJohannes Weiner } 16441f351d7fSJohannes Weiner 16451f351d7fSJohannes Weiner static inline void 16461f351d7fSJohannes Weiner rq_unlock_irqrestore(struct rq *rq, struct rq_flags *rf) 16471f351d7fSJohannes Weiner __releases(rq->lock) 16481f351d7fSJohannes Weiner { 16491f351d7fSJohannes Weiner rq_unpin_lock(rq, rf); 16505cb9eaa3SPeter Zijlstra raw_spin_rq_unlock_irqrestore(rq, rf->flags); 16511f351d7fSJohannes Weiner } 16521f351d7fSJohannes Weiner 16531f351d7fSJohannes Weiner static inline void 16541f351d7fSJohannes Weiner rq_unlock_irq(struct rq *rq, struct rq_flags *rf) 16551f351d7fSJohannes Weiner __releases(rq->lock) 16561f351d7fSJohannes Weiner { 16571f351d7fSJohannes Weiner rq_unpin_lock(rq, rf); 16585cb9eaa3SPeter Zijlstra raw_spin_rq_unlock_irq(rq); 16591f351d7fSJohannes Weiner } 16601f351d7fSJohannes Weiner 16611f351d7fSJohannes Weiner static inline void 16621f351d7fSJohannes Weiner rq_unlock(struct rq *rq, struct rq_flags *rf) 16631f351d7fSJohannes Weiner __releases(rq->lock) 16641f351d7fSJohannes Weiner { 16651f351d7fSJohannes Weiner rq_unpin_lock(rq, rf); 16665cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(rq); 16671f351d7fSJohannes Weiner } 16681f351d7fSJohannes Weiner 1669246b3b33SJohannes Weiner static inline struct rq * 1670246b3b33SJohannes Weiner this_rq_lock_irq(struct rq_flags *rf) 1671246b3b33SJohannes Weiner __acquires(rq->lock) 1672246b3b33SJohannes Weiner { 1673246b3b33SJohannes Weiner struct rq *rq; 1674246b3b33SJohannes Weiner 1675246b3b33SJohannes Weiner local_irq_disable(); 1676246b3b33SJohannes Weiner rq = this_rq(); 1677246b3b33SJohannes Weiner rq_lock(rq, rf); 1678246b3b33SJohannes Weiner return rq; 1679246b3b33SJohannes Weiner } 1680246b3b33SJohannes Weiner 16819942f79bSRik van Riel #ifdef CONFIG_NUMA 1682e3fe70b1SRik van Riel enum numa_topology_type { 1683e3fe70b1SRik van Riel NUMA_DIRECT, 1684e3fe70b1SRik van Riel NUMA_GLUELESS_MESH, 1685e3fe70b1SRik van Riel NUMA_BACKPLANE, 1686e3fe70b1SRik van Riel }; 1687e3fe70b1SRik van Riel extern enum numa_topology_type sched_numa_topology_type; 16889942f79bSRik van Riel extern int sched_max_numa_distance; 16899942f79bSRik van Riel extern bool find_numa_distance(int distance); 16900fb3978bSHuang Ying extern void sched_init_numa(int offline_node); 16910fb3978bSHuang Ying extern void sched_update_numa(int cpu, bool online); 1692f2cb1360SIngo Molnar extern void sched_domains_numa_masks_set(unsigned int cpu); 1693f2cb1360SIngo Molnar extern void sched_domains_numa_masks_clear(unsigned int cpu); 1694e0e8d491SWanpeng Li extern int sched_numa_find_closest(const struct cpumask *cpus, int cpu); 1695f2cb1360SIngo Molnar #else 16960fb3978bSHuang Ying static inline void sched_init_numa(int offline_node) { } 16970fb3978bSHuang Ying static inline void sched_update_numa(int cpu, bool online) { } 1698f2cb1360SIngo Molnar static inline void sched_domains_numa_masks_set(unsigned int cpu) { } 1699f2cb1360SIngo Molnar static inline void sched_domains_numa_masks_clear(unsigned int cpu) { } 1700e0e8d491SWanpeng Li static inline int sched_numa_find_closest(const struct cpumask *cpus, int cpu) 1701e0e8d491SWanpeng Li { 1702e0e8d491SWanpeng Li return nr_cpu_ids; 1703e0e8d491SWanpeng Li } 1704f2cb1360SIngo Molnar #endif 1705f2cb1360SIngo Molnar 1706f809ca9aSMel Gorman #ifdef CONFIG_NUMA_BALANCING 170744dba3d5SIulia Manda /* The regions in numa_faults array from task_struct */ 170844dba3d5SIulia Manda enum numa_faults_stats { 170944dba3d5SIulia Manda NUMA_MEM = 0, 171044dba3d5SIulia Manda NUMA_CPU, 171144dba3d5SIulia Manda NUMA_MEMBUF, 171244dba3d5SIulia Manda NUMA_CPUBUF 171344dba3d5SIulia Manda }; 17140ec8aa00SPeter Zijlstra extern void sched_setnuma(struct task_struct *p, int node); 1715e6628d5bSMel Gorman extern int migrate_task_to(struct task_struct *p, int cpu); 17160ad4e3dfSSrikar Dronamraju extern int migrate_swap(struct task_struct *p, struct task_struct *t, 17170ad4e3dfSSrikar Dronamraju int cpu, int scpu); 171813784475SMel Gorman extern void init_numa_balancing(unsigned long clone_flags, struct task_struct *p); 171913784475SMel Gorman #else 172013784475SMel Gorman static inline void 172113784475SMel Gorman init_numa_balancing(unsigned long clone_flags, struct task_struct *p) 172213784475SMel Gorman { 172313784475SMel Gorman } 1724f809ca9aSMel Gorman #endif /* CONFIG_NUMA_BALANCING */ 1725f809ca9aSMel Gorman 1726518cd623SPeter Zijlstra #ifdef CONFIG_SMP 1727518cd623SPeter Zijlstra 1728e3fca9e7SPeter Zijlstra static inline void 1729e3fca9e7SPeter Zijlstra queue_balance_callback(struct rq *rq, 1730e3fca9e7SPeter Zijlstra struct callback_head *head, 1731e3fca9e7SPeter Zijlstra void (*func)(struct rq *rq)) 1732e3fca9e7SPeter Zijlstra { 17335cb9eaa3SPeter Zijlstra lockdep_assert_rq_held(rq); 1734e3fca9e7SPeter Zijlstra 1735ae792702SPeter Zijlstra if (unlikely(head->next || rq->balance_callback == &balance_push_callback)) 1736e3fca9e7SPeter Zijlstra return; 1737e3fca9e7SPeter Zijlstra 1738e3fca9e7SPeter Zijlstra head->func = (void (*)(struct callback_head *))func; 1739e3fca9e7SPeter Zijlstra head->next = rq->balance_callback; 1740e3fca9e7SPeter Zijlstra rq->balance_callback = head; 1741e3fca9e7SPeter Zijlstra } 1742e3fca9e7SPeter Zijlstra 1743391e43daSPeter Zijlstra #define rcu_dereference_check_sched_domain(p) \ 1744391e43daSPeter Zijlstra rcu_dereference_check((p), \ 1745391e43daSPeter Zijlstra lockdep_is_held(&sched_domains_mutex)) 1746391e43daSPeter Zijlstra 1747391e43daSPeter Zijlstra /* 1748391e43daSPeter Zijlstra * The domain tree (rq->sd) is protected by RCU's quiescent state transition. 1749337e9b07SPaul E. McKenney * See destroy_sched_domains: call_rcu for details. 1750391e43daSPeter Zijlstra * 1751391e43daSPeter Zijlstra * The domain tree of any CPU may only be accessed from within 1752391e43daSPeter Zijlstra * preempt-disabled sections. 1753391e43daSPeter Zijlstra */ 1754391e43daSPeter Zijlstra #define for_each_domain(cpu, __sd) \ 1755518cd623SPeter Zijlstra for (__sd = rcu_dereference_check_sched_domain(cpu_rq(cpu)->sd); \ 1756518cd623SPeter Zijlstra __sd; __sd = __sd->parent) 1757391e43daSPeter Zijlstra 1758518cd623SPeter Zijlstra /** 1759518cd623SPeter Zijlstra * highest_flag_domain - Return highest sched_domain containing flag. 176097fb7a0aSIngo Molnar * @cpu: The CPU whose highest level of sched domain is to 1761518cd623SPeter Zijlstra * be returned. 1762518cd623SPeter Zijlstra * @flag: The flag to check for the highest sched_domain 176397fb7a0aSIngo Molnar * for the given CPU. 1764518cd623SPeter Zijlstra * 176597fb7a0aSIngo Molnar * Returns the highest sched_domain of a CPU which contains the given flag. 1766518cd623SPeter Zijlstra */ 1767518cd623SPeter Zijlstra static inline struct sched_domain *highest_flag_domain(int cpu, int flag) 1768518cd623SPeter Zijlstra { 1769518cd623SPeter Zijlstra struct sched_domain *sd, *hsd = NULL; 1770518cd623SPeter Zijlstra 1771518cd623SPeter Zijlstra for_each_domain(cpu, sd) { 1772518cd623SPeter Zijlstra if (!(sd->flags & flag)) 1773518cd623SPeter Zijlstra break; 1774518cd623SPeter Zijlstra hsd = sd; 1775518cd623SPeter Zijlstra } 1776518cd623SPeter Zijlstra 1777518cd623SPeter Zijlstra return hsd; 1778518cd623SPeter Zijlstra } 1779518cd623SPeter Zijlstra 1780fb13c7eeSMel Gorman static inline struct sched_domain *lowest_flag_domain(int cpu, int flag) 1781fb13c7eeSMel Gorman { 1782fb13c7eeSMel Gorman struct sched_domain *sd; 1783fb13c7eeSMel Gorman 1784fb13c7eeSMel Gorman for_each_domain(cpu, sd) { 1785fb13c7eeSMel Gorman if (sd->flags & flag) 1786fb13c7eeSMel Gorman break; 1787fb13c7eeSMel Gorman } 1788fb13c7eeSMel Gorman 1789fb13c7eeSMel Gorman return sd; 1790fb13c7eeSMel Gorman } 1791fb13c7eeSMel Gorman 1792994aeb7aSJoel Fernandes (Google) DECLARE_PER_CPU(struct sched_domain __rcu *, sd_llc); 17937d9ffa89SPeter Zijlstra DECLARE_PER_CPU(int, sd_llc_size); 1794518cd623SPeter Zijlstra DECLARE_PER_CPU(int, sd_llc_id); 1795994aeb7aSJoel Fernandes (Google) DECLARE_PER_CPU(struct sched_domain_shared __rcu *, sd_llc_shared); 1796994aeb7aSJoel Fernandes (Google) DECLARE_PER_CPU(struct sched_domain __rcu *, sd_numa); 1797994aeb7aSJoel Fernandes (Google) DECLARE_PER_CPU(struct sched_domain __rcu *, sd_asym_packing); 1798994aeb7aSJoel Fernandes (Google) DECLARE_PER_CPU(struct sched_domain __rcu *, sd_asym_cpucapacity); 1799df054e84SMorten Rasmussen extern struct static_key_false sched_asym_cpucapacity; 1800518cd623SPeter Zijlstra 180163b2ca30SNicolas Pitre struct sched_group_capacity { 18025e6521eaSLi Zefan atomic_t ref; 18035e6521eaSLi Zefan /* 1804172895e6SYuyang Du * CPU capacity of this group, SCHED_CAPACITY_SCALE being max capacity 180563b2ca30SNicolas Pitre * for a single CPU. 18065e6521eaSLi Zefan */ 1807bf475ce0SMorten Rasmussen unsigned long capacity; 1808bf475ce0SMorten Rasmussen unsigned long min_capacity; /* Min per-CPU capacity in group */ 1809e3d6d0cbSMorten Rasmussen unsigned long max_capacity; /* Max per-CPU capacity in group */ 18105e6521eaSLi Zefan unsigned long next_update; 181163b2ca30SNicolas Pitre int imbalance; /* XXX unrelated to capacity but shared group state */ 18125e6521eaSLi Zefan 1813005f874dSPeter Zijlstra #ifdef CONFIG_SCHED_DEBUG 1814005f874dSPeter Zijlstra int id; 1815005f874dSPeter Zijlstra #endif 1816005f874dSPeter Zijlstra 1817eba9f082Szhuguangqing unsigned long cpumask[]; /* Balance mask */ 18185e6521eaSLi Zefan }; 18195e6521eaSLi Zefan 18205e6521eaSLi Zefan struct sched_group { 18215e6521eaSLi Zefan struct sched_group *next; /* Must be a circular list */ 18225e6521eaSLi Zefan atomic_t ref; 18235e6521eaSLi Zefan 18245e6521eaSLi Zefan unsigned int group_weight; 182563b2ca30SNicolas Pitre struct sched_group_capacity *sgc; 182697fb7a0aSIngo Molnar int asym_prefer_cpu; /* CPU of highest priority in group */ 182716d364baSRicardo Neri int flags; 18285e6521eaSLi Zefan 18295e6521eaSLi Zefan /* 18305e6521eaSLi Zefan * The CPUs this group covers. 18315e6521eaSLi Zefan * 18325e6521eaSLi Zefan * NOTE: this field is variable length. (Allocated dynamically 18335e6521eaSLi Zefan * by attaching extra space to the end of the structure, 18345e6521eaSLi Zefan * depending on how many CPUs the kernel has booted up with) 18355e6521eaSLi Zefan */ 183604f5c362SGustavo A. R. Silva unsigned long cpumask[]; 18375e6521eaSLi Zefan }; 18385e6521eaSLi Zefan 1839ae4df9d6SPeter Zijlstra static inline struct cpumask *sched_group_span(struct sched_group *sg) 18405e6521eaSLi Zefan { 18415e6521eaSLi Zefan return to_cpumask(sg->cpumask); 18425e6521eaSLi Zefan } 18435e6521eaSLi Zefan 18445e6521eaSLi Zefan /* 1845e5c14b1fSPeter Zijlstra * See build_balance_mask(). 18465e6521eaSLi Zefan */ 1847e5c14b1fSPeter Zijlstra static inline struct cpumask *group_balance_mask(struct sched_group *sg) 18485e6521eaSLi Zefan { 184963b2ca30SNicolas Pitre return to_cpumask(sg->sgc->cpumask); 18505e6521eaSLi Zefan } 18515e6521eaSLi Zefan 1852c1174876SPeter Zijlstra extern int group_balance_cpu(struct sched_group *sg); 1853c1174876SPeter Zijlstra 18543b87f136SPeter Zijlstra #ifdef CONFIG_SCHED_DEBUG 18553b87f136SPeter Zijlstra void update_sched_domain_debugfs(void); 1856bbdacdfeSPeter Zijlstra void dirty_sched_domain_sysctl(int cpu); 18573866e845SSteven Rostedt (Red Hat) #else 18583b87f136SPeter Zijlstra static inline void update_sched_domain_debugfs(void) 18593866e845SSteven Rostedt (Red Hat) { 18603866e845SSteven Rostedt (Red Hat) } 1861bbdacdfeSPeter Zijlstra static inline void dirty_sched_domain_sysctl(int cpu) 1862bbdacdfeSPeter Zijlstra { 1863bbdacdfeSPeter Zijlstra } 18643866e845SSteven Rostedt (Red Hat) #endif 18653866e845SSteven Rostedt (Red Hat) 18668a99b683SPeter Zijlstra extern int sched_update_scaling(void); 1867d664e399SThomas Gleixner #endif /* CONFIG_SMP */ 1868391e43daSPeter Zijlstra 1869391e43daSPeter Zijlstra #include "stats.h" 1870391e43daSPeter Zijlstra 18714feee7d1SJosh Don #if defined(CONFIG_SCHED_CORE) && defined(CONFIG_SCHEDSTATS) 18724feee7d1SJosh Don 18734feee7d1SJosh Don extern void __sched_core_account_forceidle(struct rq *rq); 18744feee7d1SJosh Don 18754feee7d1SJosh Don static inline void sched_core_account_forceidle(struct rq *rq) 18764feee7d1SJosh Don { 18774feee7d1SJosh Don if (schedstat_enabled()) 18784feee7d1SJosh Don __sched_core_account_forceidle(rq); 18794feee7d1SJosh Don } 18804feee7d1SJosh Don 18814feee7d1SJosh Don extern void __sched_core_tick(struct rq *rq); 18824feee7d1SJosh Don 18834feee7d1SJosh Don static inline void sched_core_tick(struct rq *rq) 18844feee7d1SJosh Don { 18854feee7d1SJosh Don if (sched_core_enabled(rq) && schedstat_enabled()) 18864feee7d1SJosh Don __sched_core_tick(rq); 18874feee7d1SJosh Don } 18884feee7d1SJosh Don 18894feee7d1SJosh Don #else 18904feee7d1SJosh Don 18914feee7d1SJosh Don static inline void sched_core_account_forceidle(struct rq *rq) {} 18924feee7d1SJosh Don 18934feee7d1SJosh Don static inline void sched_core_tick(struct rq *rq) {} 18944feee7d1SJosh Don 18954feee7d1SJosh Don #endif /* CONFIG_SCHED_CORE && CONFIG_SCHEDSTATS */ 18964feee7d1SJosh Don 1897391e43daSPeter Zijlstra #ifdef CONFIG_CGROUP_SCHED 1898391e43daSPeter Zijlstra 1899391e43daSPeter Zijlstra /* 1900391e43daSPeter Zijlstra * Return the group to which this tasks belongs. 1901391e43daSPeter Zijlstra * 19028af01f56STejun Heo * We cannot use task_css() and friends because the cgroup subsystem 19038af01f56STejun Heo * changes that value before the cgroup_subsys::attach() method is called, 19048af01f56STejun Heo * therefore we cannot pin it and might observe the wrong value. 19058323f26cSPeter Zijlstra * 19068323f26cSPeter Zijlstra * The same is true for autogroup's p->signal->autogroup->tg, the autogroup 19078323f26cSPeter Zijlstra * core changes this before calling sched_move_task(). 19088323f26cSPeter Zijlstra * 19098323f26cSPeter Zijlstra * Instead we use a 'copy' which is updated from sched_move_task() while 19108323f26cSPeter Zijlstra * holding both task_struct::pi_lock and rq::lock. 1911391e43daSPeter Zijlstra */ 1912391e43daSPeter Zijlstra static inline struct task_group *task_group(struct task_struct *p) 1913391e43daSPeter Zijlstra { 19148323f26cSPeter Zijlstra return p->sched_task_group; 1915391e43daSPeter Zijlstra } 1916391e43daSPeter Zijlstra 1917391e43daSPeter Zijlstra /* Change a task's cfs_rq and parent entity if it moves across CPUs/groups */ 1918391e43daSPeter Zijlstra static inline void set_task_rq(struct task_struct *p, unsigned int cpu) 1919391e43daSPeter Zijlstra { 1920391e43daSPeter Zijlstra #if defined(CONFIG_FAIR_GROUP_SCHED) || defined(CONFIG_RT_GROUP_SCHED) 1921391e43daSPeter Zijlstra struct task_group *tg = task_group(p); 1922391e43daSPeter Zijlstra #endif 1923391e43daSPeter Zijlstra 1924391e43daSPeter Zijlstra #ifdef CONFIG_FAIR_GROUP_SCHED 1925ad936d86SByungchul Park set_task_rq_fair(&p->se, p->se.cfs_rq, tg->cfs_rq[cpu]); 1926391e43daSPeter Zijlstra p->se.cfs_rq = tg->cfs_rq[cpu]; 1927391e43daSPeter Zijlstra p->se.parent = tg->se[cpu]; 1928391e43daSPeter Zijlstra #endif 1929391e43daSPeter Zijlstra 1930391e43daSPeter Zijlstra #ifdef CONFIG_RT_GROUP_SCHED 1931391e43daSPeter Zijlstra p->rt.rt_rq = tg->rt_rq[cpu]; 1932391e43daSPeter Zijlstra p->rt.parent = tg->rt_se[cpu]; 1933391e43daSPeter Zijlstra #endif 1934391e43daSPeter Zijlstra } 1935391e43daSPeter Zijlstra 1936391e43daSPeter Zijlstra #else /* CONFIG_CGROUP_SCHED */ 1937391e43daSPeter Zijlstra 1938391e43daSPeter Zijlstra static inline void set_task_rq(struct task_struct *p, unsigned int cpu) { } 1939391e43daSPeter Zijlstra static inline struct task_group *task_group(struct task_struct *p) 1940391e43daSPeter Zijlstra { 1941391e43daSPeter Zijlstra return NULL; 1942391e43daSPeter Zijlstra } 1943391e43daSPeter Zijlstra 1944391e43daSPeter Zijlstra #endif /* CONFIG_CGROUP_SCHED */ 1945391e43daSPeter Zijlstra 1946391e43daSPeter Zijlstra static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu) 1947391e43daSPeter Zijlstra { 1948391e43daSPeter Zijlstra set_task_rq(p, cpu); 1949391e43daSPeter Zijlstra #ifdef CONFIG_SMP 1950391e43daSPeter Zijlstra /* 1951391e43daSPeter Zijlstra * After ->cpu is set up to a new value, task_rq_lock(p, ...) can be 1952dfcb245eSIngo Molnar * successfully executed on another CPU. We must ensure that updates of 1953391e43daSPeter Zijlstra * per-task data have been completed by this moment. 1954391e43daSPeter Zijlstra */ 1955391e43daSPeter Zijlstra smp_wmb(); 1956c546951dSAndrea Parri WRITE_ONCE(task_thread_info(p)->cpu, cpu); 1957ac66f547SPeter Zijlstra p->wake_cpu = cpu; 1958391e43daSPeter Zijlstra #endif 1959391e43daSPeter Zijlstra } 1960391e43daSPeter Zijlstra 1961391e43daSPeter Zijlstra /* 1962391e43daSPeter Zijlstra * Tunables that become constants when CONFIG_SCHED_DEBUG is off: 1963391e43daSPeter Zijlstra */ 1964391e43daSPeter Zijlstra #ifdef CONFIG_SCHED_DEBUG 1965391e43daSPeter Zijlstra # define const_debug __read_mostly 1966391e43daSPeter Zijlstra #else 1967391e43daSPeter Zijlstra # define const_debug const 1968391e43daSPeter Zijlstra #endif 1969391e43daSPeter Zijlstra 1970391e43daSPeter Zijlstra #define SCHED_FEAT(name, enabled) \ 1971391e43daSPeter Zijlstra __SCHED_FEAT_##name , 1972391e43daSPeter Zijlstra 1973391e43daSPeter Zijlstra enum { 1974391e43daSPeter Zijlstra #include "features.h" 1975f8b6d1ccSPeter Zijlstra __SCHED_FEAT_NR, 1976391e43daSPeter Zijlstra }; 1977391e43daSPeter Zijlstra 1978391e43daSPeter Zijlstra #undef SCHED_FEAT 1979391e43daSPeter Zijlstra 1980a73f863aSJuri Lelli #ifdef CONFIG_SCHED_DEBUG 1981765cc3a4SPatrick Bellasi 1982765cc3a4SPatrick Bellasi /* 1983765cc3a4SPatrick Bellasi * To support run-time toggling of sched features, all the translation units 1984765cc3a4SPatrick Bellasi * (but core.c) reference the sysctl_sched_features defined in core.c. 1985765cc3a4SPatrick Bellasi */ 1986765cc3a4SPatrick Bellasi extern const_debug unsigned int sysctl_sched_features; 1987765cc3a4SPatrick Bellasi 1988a73f863aSJuri Lelli #ifdef CONFIG_JUMP_LABEL 1989f8b6d1ccSPeter Zijlstra #define SCHED_FEAT(name, enabled) \ 1990c5905afbSIngo Molnar static __always_inline bool static_branch_##name(struct static_key *key) \ 1991f8b6d1ccSPeter Zijlstra { \ 19926e76ea8aSJason Baron return static_key_##enabled(key); \ 1993f8b6d1ccSPeter Zijlstra } 1994f8b6d1ccSPeter Zijlstra 1995f8b6d1ccSPeter Zijlstra #include "features.h" 1996f8b6d1ccSPeter Zijlstra #undef SCHED_FEAT 1997f8b6d1ccSPeter Zijlstra 1998c5905afbSIngo Molnar extern struct static_key sched_feat_keys[__SCHED_FEAT_NR]; 1999f8b6d1ccSPeter Zijlstra #define sched_feat(x) (static_branch_##x(&sched_feat_keys[__SCHED_FEAT_##x])) 2000765cc3a4SPatrick Bellasi 2001a73f863aSJuri Lelli #else /* !CONFIG_JUMP_LABEL */ 2002a73f863aSJuri Lelli 2003a73f863aSJuri Lelli #define sched_feat(x) (sysctl_sched_features & (1UL << __SCHED_FEAT_##x)) 2004a73f863aSJuri Lelli 2005a73f863aSJuri Lelli #endif /* CONFIG_JUMP_LABEL */ 2006a73f863aSJuri Lelli 2007a73f863aSJuri Lelli #else /* !SCHED_DEBUG */ 2008765cc3a4SPatrick Bellasi 2009765cc3a4SPatrick Bellasi /* 2010765cc3a4SPatrick Bellasi * Each translation unit has its own copy of sysctl_sched_features to allow 2011765cc3a4SPatrick Bellasi * constants propagation at compile time and compiler optimization based on 2012765cc3a4SPatrick Bellasi * features default. 2013765cc3a4SPatrick Bellasi */ 2014765cc3a4SPatrick Bellasi #define SCHED_FEAT(name, enabled) \ 2015765cc3a4SPatrick Bellasi (1UL << __SCHED_FEAT_##name) * enabled | 2016765cc3a4SPatrick Bellasi static const_debug __maybe_unused unsigned int sysctl_sched_features = 2017765cc3a4SPatrick Bellasi #include "features.h" 2018765cc3a4SPatrick Bellasi 0; 2019765cc3a4SPatrick Bellasi #undef SCHED_FEAT 2020765cc3a4SPatrick Bellasi 20217e6f4c5dSPeter Zijlstra #define sched_feat(x) !!(sysctl_sched_features & (1UL << __SCHED_FEAT_##x)) 2022765cc3a4SPatrick Bellasi 2023a73f863aSJuri Lelli #endif /* SCHED_DEBUG */ 2024391e43daSPeter Zijlstra 20252a595721SSrikar Dronamraju extern struct static_key_false sched_numa_balancing; 2026cb251765SMel Gorman extern struct static_key_false sched_schedstats; 2027cbee9f88SPeter Zijlstra 2028391e43daSPeter Zijlstra static inline u64 global_rt_period(void) 2029391e43daSPeter Zijlstra { 2030391e43daSPeter Zijlstra return (u64)sysctl_sched_rt_period * NSEC_PER_USEC; 2031391e43daSPeter Zijlstra } 2032391e43daSPeter Zijlstra 2033391e43daSPeter Zijlstra static inline u64 global_rt_runtime(void) 2034391e43daSPeter Zijlstra { 2035391e43daSPeter Zijlstra if (sysctl_sched_rt_runtime < 0) 2036391e43daSPeter Zijlstra return RUNTIME_INF; 2037391e43daSPeter Zijlstra 2038391e43daSPeter Zijlstra return (u64)sysctl_sched_rt_runtime * NSEC_PER_USEC; 2039391e43daSPeter Zijlstra } 2040391e43daSPeter Zijlstra 2041391e43daSPeter Zijlstra static inline int task_current(struct rq *rq, struct task_struct *p) 2042391e43daSPeter Zijlstra { 2043391e43daSPeter Zijlstra return rq->curr == p; 2044391e43daSPeter Zijlstra } 2045391e43daSPeter Zijlstra 2046391e43daSPeter Zijlstra static inline int task_running(struct rq *rq, struct task_struct *p) 2047391e43daSPeter Zijlstra { 2048391e43daSPeter Zijlstra #ifdef CONFIG_SMP 2049391e43daSPeter Zijlstra return p->on_cpu; 2050391e43daSPeter Zijlstra #else 2051391e43daSPeter Zijlstra return task_current(rq, p); 2052391e43daSPeter Zijlstra #endif 2053391e43daSPeter Zijlstra } 2054391e43daSPeter Zijlstra 2055da0c1e65SKirill Tkhai static inline int task_on_rq_queued(struct task_struct *p) 2056da0c1e65SKirill Tkhai { 2057da0c1e65SKirill Tkhai return p->on_rq == TASK_ON_RQ_QUEUED; 2058da0c1e65SKirill Tkhai } 2059391e43daSPeter Zijlstra 2060cca26e80SKirill Tkhai static inline int task_on_rq_migrating(struct task_struct *p) 2061cca26e80SKirill Tkhai { 2062c546951dSAndrea Parri return READ_ONCE(p->on_rq) == TASK_ON_RQ_MIGRATING; 2063cca26e80SKirill Tkhai } 2064cca26e80SKirill Tkhai 206517770579SValentin Schneider /* Wake flags. The first three directly map to some SD flag value */ 206617770579SValentin Schneider #define WF_EXEC 0x02 /* Wakeup after exec; maps to SD_BALANCE_EXEC */ 206717770579SValentin Schneider #define WF_FORK 0x04 /* Wakeup after fork; maps to SD_BALANCE_FORK */ 206817770579SValentin Schneider #define WF_TTWU 0x08 /* Wakeup; maps to SD_BALANCE_WAKE */ 206917770579SValentin Schneider 207017770579SValentin Schneider #define WF_SYNC 0x10 /* Waker goes to sleep after wakeup */ 207117770579SValentin Schneider #define WF_MIGRATED 0x20 /* Internal use, task got migrated */ 207217770579SValentin Schneider 207317770579SValentin Schneider #ifdef CONFIG_SMP 207417770579SValentin Schneider static_assert(WF_EXEC == SD_BALANCE_EXEC); 207517770579SValentin Schneider static_assert(WF_FORK == SD_BALANCE_FORK); 207617770579SValentin Schneider static_assert(WF_TTWU == SD_BALANCE_WAKE); 207717770579SValentin Schneider #endif 2078b13095f0SLi Zefan 2079391e43daSPeter Zijlstra /* 2080391e43daSPeter Zijlstra * To aid in avoiding the subversion of "niceness" due to uneven distribution 2081391e43daSPeter Zijlstra * of tasks with abnormal "nice" values across CPUs the contribution that 2082391e43daSPeter Zijlstra * each task makes to its run queue's load is weighted according to its 2083391e43daSPeter Zijlstra * scheduling class and "nice" value. For SCHED_NORMAL tasks this is just a 2084391e43daSPeter Zijlstra * scaled version of the new time slice allocation that they receive on time 2085391e43daSPeter Zijlstra * slice expiry etc. 2086391e43daSPeter Zijlstra */ 2087391e43daSPeter Zijlstra 2088391e43daSPeter Zijlstra #define WEIGHT_IDLEPRIO 3 2089391e43daSPeter Zijlstra #define WMULT_IDLEPRIO 1431655765 2090391e43daSPeter Zijlstra 2091ed82b8a1SAndi Kleen extern const int sched_prio_to_weight[40]; 2092ed82b8a1SAndi Kleen extern const u32 sched_prio_to_wmult[40]; 2093391e43daSPeter Zijlstra 2094ff77e468SPeter Zijlstra /* 2095ff77e468SPeter Zijlstra * {de,en}queue flags: 2096ff77e468SPeter Zijlstra * 2097ff77e468SPeter Zijlstra * DEQUEUE_SLEEP - task is no longer runnable 2098ff77e468SPeter Zijlstra * ENQUEUE_WAKEUP - task just became runnable 2099ff77e468SPeter Zijlstra * 2100ff77e468SPeter Zijlstra * SAVE/RESTORE - an otherwise spurious dequeue/enqueue, done to ensure tasks 2101ff77e468SPeter Zijlstra * are in a known state which allows modification. Such pairs 2102ff77e468SPeter Zijlstra * should preserve as much state as possible. 2103ff77e468SPeter Zijlstra * 2104ff77e468SPeter Zijlstra * MOVE - paired with SAVE/RESTORE, explicitly does not preserve the location 2105ff77e468SPeter Zijlstra * in the runqueue. 2106ff77e468SPeter Zijlstra * 2107ff77e468SPeter Zijlstra * ENQUEUE_HEAD - place at front of runqueue (tail if not specified) 2108ff77e468SPeter Zijlstra * ENQUEUE_REPLENISH - CBS (replenish runtime and postpone deadline) 210959efa0baSPeter Zijlstra * ENQUEUE_MIGRATED - the task was migrated during wakeup 2110ff77e468SPeter Zijlstra * 2111ff77e468SPeter Zijlstra */ 2112ff77e468SPeter Zijlstra 2113ff77e468SPeter Zijlstra #define DEQUEUE_SLEEP 0x01 211497fb7a0aSIngo Molnar #define DEQUEUE_SAVE 0x02 /* Matches ENQUEUE_RESTORE */ 211597fb7a0aSIngo Molnar #define DEQUEUE_MOVE 0x04 /* Matches ENQUEUE_MOVE */ 211697fb7a0aSIngo Molnar #define DEQUEUE_NOCLOCK 0x08 /* Matches ENQUEUE_NOCLOCK */ 2117ff77e468SPeter Zijlstra 21181de64443SPeter Zijlstra #define ENQUEUE_WAKEUP 0x01 2119ff77e468SPeter Zijlstra #define ENQUEUE_RESTORE 0x02 2120ff77e468SPeter Zijlstra #define ENQUEUE_MOVE 0x04 21210a67d1eeSPeter Zijlstra #define ENQUEUE_NOCLOCK 0x08 2122ff77e468SPeter Zijlstra 21230a67d1eeSPeter Zijlstra #define ENQUEUE_HEAD 0x10 21240a67d1eeSPeter Zijlstra #define ENQUEUE_REPLENISH 0x20 2125c82ba9faSLi Zefan #ifdef CONFIG_SMP 21260a67d1eeSPeter Zijlstra #define ENQUEUE_MIGRATED 0x40 2127c82ba9faSLi Zefan #else 212859efa0baSPeter Zijlstra #define ENQUEUE_MIGRATED 0x00 2129c82ba9faSLi Zefan #endif 2130c82ba9faSLi Zefan 213137e117c0SPeter Zijlstra #define RETRY_TASK ((void *)-1UL) 213237e117c0SPeter Zijlstra 2133c82ba9faSLi Zefan struct sched_class { 2134c82ba9faSLi Zefan 213569842cbaSPatrick Bellasi #ifdef CONFIG_UCLAMP_TASK 213669842cbaSPatrick Bellasi int uclamp_enabled; 213769842cbaSPatrick Bellasi #endif 213869842cbaSPatrick Bellasi 2139c82ba9faSLi Zefan void (*enqueue_task) (struct rq *rq, struct task_struct *p, int flags); 2140c82ba9faSLi Zefan void (*dequeue_task) (struct rq *rq, struct task_struct *p, int flags); 2141c82ba9faSLi Zefan void (*yield_task) (struct rq *rq); 21420900acf2SDietmar Eggemann bool (*yield_to_task)(struct rq *rq, struct task_struct *p); 2143c82ba9faSLi Zefan 2144c82ba9faSLi Zefan void (*check_preempt_curr)(struct rq *rq, struct task_struct *p, int flags); 2145c82ba9faSLi Zefan 214698c2f700SPeter Zijlstra struct task_struct *(*pick_next_task)(struct rq *rq); 214798c2f700SPeter Zijlstra 21486e2df058SPeter Zijlstra void (*put_prev_task)(struct rq *rq, struct task_struct *p); 2149a0e813f2SPeter Zijlstra void (*set_next_task)(struct rq *rq, struct task_struct *p, bool first); 2150c82ba9faSLi Zefan 2151c82ba9faSLi Zefan #ifdef CONFIG_SMP 21526e2df058SPeter Zijlstra int (*balance)(struct rq *rq, struct task_struct *prev, struct rq_flags *rf); 21533aef1551SValentin Schneider int (*select_task_rq)(struct task_struct *p, int task_cpu, int flags); 215421f56ffeSPeter Zijlstra 215521f56ffeSPeter Zijlstra struct task_struct * (*pick_task)(struct rq *rq); 215621f56ffeSPeter Zijlstra 21571327237aSSrikar Dronamraju void (*migrate_task_rq)(struct task_struct *p, int new_cpu); 2158c82ba9faSLi Zefan 2159c82ba9faSLi Zefan void (*task_woken)(struct rq *this_rq, struct task_struct *task); 2160c82ba9faSLi Zefan 2161c82ba9faSLi Zefan void (*set_cpus_allowed)(struct task_struct *p, 21629cfc3e18SPeter Zijlstra const struct cpumask *newmask, 21639cfc3e18SPeter Zijlstra u32 flags); 2164c82ba9faSLi Zefan 2165c82ba9faSLi Zefan void (*rq_online)(struct rq *rq); 2166c82ba9faSLi Zefan void (*rq_offline)(struct rq *rq); 2167a7c81556SPeter Zijlstra 2168a7c81556SPeter Zijlstra struct rq *(*find_lock_rq)(struct task_struct *p, struct rq *rq); 2169c82ba9faSLi Zefan #endif 2170c82ba9faSLi Zefan 2171c82ba9faSLi Zefan void (*task_tick)(struct rq *rq, struct task_struct *p, int queued); 2172c82ba9faSLi Zefan void (*task_fork)(struct task_struct *p); 2173e6c390f2SDario Faggioli void (*task_dead)(struct task_struct *p); 2174c82ba9faSLi Zefan 217567dfa1b7SKirill Tkhai /* 217667dfa1b7SKirill Tkhai * The switched_from() call is allowed to drop rq->lock, therefore we 21773b03706fSIngo Molnar * cannot assume the switched_from/switched_to pair is serialized by 217867dfa1b7SKirill Tkhai * rq->lock. They are however serialized by p->pi_lock. 217967dfa1b7SKirill Tkhai */ 2180c82ba9faSLi Zefan void (*switched_from)(struct rq *this_rq, struct task_struct *task); 2181c82ba9faSLi Zefan void (*switched_to) (struct rq *this_rq, struct task_struct *task); 2182c82ba9faSLi Zefan void (*prio_changed) (struct rq *this_rq, struct task_struct *task, 2183c82ba9faSLi Zefan int oldprio); 2184c82ba9faSLi Zefan 2185c82ba9faSLi Zefan unsigned int (*get_rr_interval)(struct rq *rq, 2186c82ba9faSLi Zefan struct task_struct *task); 2187c82ba9faSLi Zefan 21886e998916SStanislaw Gruszka void (*update_curr)(struct rq *rq); 21896e998916SStanislaw Gruszka 2190ea86cb4bSVincent Guittot #define TASK_SET_GROUP 0 2191ea86cb4bSVincent Guittot #define TASK_MOVE_GROUP 1 2192ea86cb4bSVincent Guittot 2193c82ba9faSLi Zefan #ifdef CONFIG_FAIR_GROUP_SCHED 2194ea86cb4bSVincent Guittot void (*task_change_group)(struct task_struct *p, int type); 2195c82ba9faSLi Zefan #endif 219643c31ac0SPeter Zijlstra }; 2197391e43daSPeter Zijlstra 21983f1d2a31SPeter Zijlstra static inline void put_prev_task(struct rq *rq, struct task_struct *prev) 21993f1d2a31SPeter Zijlstra { 220010e7071bSPeter Zijlstra WARN_ON_ONCE(rq->curr != prev); 22016e2df058SPeter Zijlstra prev->sched_class->put_prev_task(rq, prev); 22023f1d2a31SPeter Zijlstra } 22033f1d2a31SPeter Zijlstra 220403b7fad1SPeter Zijlstra static inline void set_next_task(struct rq *rq, struct task_struct *next) 2205b2bf6c31SPeter Zijlstra { 2206a0e813f2SPeter Zijlstra next->sched_class->set_next_task(rq, next, false); 2207b2bf6c31SPeter Zijlstra } 2208b2bf6c31SPeter Zijlstra 220943c31ac0SPeter Zijlstra 221043c31ac0SPeter Zijlstra /* 221143c31ac0SPeter Zijlstra * Helper to define a sched_class instance; each one is placed in a separate 221243c31ac0SPeter Zijlstra * section which is ordered by the linker script: 221343c31ac0SPeter Zijlstra * 221443c31ac0SPeter Zijlstra * include/asm-generic/vmlinux.lds.h 221543c31ac0SPeter Zijlstra * 2216546a3feeSPeter Zijlstra * *CAREFUL* they are laid out in *REVERSE* order!!! 2217546a3feeSPeter Zijlstra * 221843c31ac0SPeter Zijlstra * Also enforce alignment on the instance, not the type, to guarantee layout. 221943c31ac0SPeter Zijlstra */ 222043c31ac0SPeter Zijlstra #define DEFINE_SCHED_CLASS(name) \ 222143c31ac0SPeter Zijlstra const struct sched_class name##_sched_class \ 222243c31ac0SPeter Zijlstra __aligned(__alignof__(struct sched_class)) \ 222343c31ac0SPeter Zijlstra __section("__" #name "_sched_class") 222443c31ac0SPeter Zijlstra 2225c3a340f7SSteven Rostedt (VMware) /* Defined in include/asm-generic/vmlinux.lds.h */ 2226546a3feeSPeter Zijlstra extern struct sched_class __sched_class_highest[]; 2227546a3feeSPeter Zijlstra extern struct sched_class __sched_class_lowest[]; 22286e2df058SPeter Zijlstra 22296e2df058SPeter Zijlstra #define for_class_range(class, _from, _to) \ 2230546a3feeSPeter Zijlstra for (class = (_from); class < (_to); class++) 22316e2df058SPeter Zijlstra 2232391e43daSPeter Zijlstra #define for_each_class(class) \ 2233546a3feeSPeter Zijlstra for_class_range(class, __sched_class_highest, __sched_class_lowest) 2234546a3feeSPeter Zijlstra 2235546a3feeSPeter Zijlstra #define sched_class_above(_a, _b) ((_a) < (_b)) 2236391e43daSPeter Zijlstra 2237391e43daSPeter Zijlstra extern const struct sched_class stop_sched_class; 2238aab03e05SDario Faggioli extern const struct sched_class dl_sched_class; 2239391e43daSPeter Zijlstra extern const struct sched_class rt_sched_class; 2240391e43daSPeter Zijlstra extern const struct sched_class fair_sched_class; 2241391e43daSPeter Zijlstra extern const struct sched_class idle_sched_class; 2242391e43daSPeter Zijlstra 22436e2df058SPeter Zijlstra static inline bool sched_stop_runnable(struct rq *rq) 22446e2df058SPeter Zijlstra { 22456e2df058SPeter Zijlstra return rq->stop && task_on_rq_queued(rq->stop); 22466e2df058SPeter Zijlstra } 22476e2df058SPeter Zijlstra 22486e2df058SPeter Zijlstra static inline bool sched_dl_runnable(struct rq *rq) 22496e2df058SPeter Zijlstra { 22506e2df058SPeter Zijlstra return rq->dl.dl_nr_running > 0; 22516e2df058SPeter Zijlstra } 22526e2df058SPeter Zijlstra 22536e2df058SPeter Zijlstra static inline bool sched_rt_runnable(struct rq *rq) 22546e2df058SPeter Zijlstra { 22556e2df058SPeter Zijlstra return rq->rt.rt_queued > 0; 22566e2df058SPeter Zijlstra } 22576e2df058SPeter Zijlstra 22586e2df058SPeter Zijlstra static inline bool sched_fair_runnable(struct rq *rq) 22596e2df058SPeter Zijlstra { 22606e2df058SPeter Zijlstra return rq->cfs.nr_running > 0; 22616e2df058SPeter Zijlstra } 2262391e43daSPeter Zijlstra 22635d7d6056SPeter Zijlstra extern struct task_struct *pick_next_task_fair(struct rq *rq, struct task_struct *prev, struct rq_flags *rf); 226498c2f700SPeter Zijlstra extern struct task_struct *pick_next_task_idle(struct rq *rq); 22655d7d6056SPeter Zijlstra 2266af449901SPeter Zijlstra #define SCA_CHECK 0x01 2267af449901SPeter Zijlstra #define SCA_MIGRATE_DISABLE 0x02 2268af449901SPeter Zijlstra #define SCA_MIGRATE_ENABLE 0x04 226907ec77a1SWill Deacon #define SCA_USER 0x08 2270af449901SPeter Zijlstra 2271391e43daSPeter Zijlstra #ifdef CONFIG_SMP 2272391e43daSPeter Zijlstra 227363b2ca30SNicolas Pitre extern void update_group_capacity(struct sched_domain *sd, int cpu); 2274b719203bSLi Zefan 22757caff66fSDaniel Lezcano extern void trigger_load_balance(struct rq *rq); 2276391e43daSPeter Zijlstra 22779cfc3e18SPeter Zijlstra extern void set_cpus_allowed_common(struct task_struct *p, const struct cpumask *new_mask, u32 flags); 2278c5b28038SPeter Zijlstra 2279a7c81556SPeter Zijlstra static inline struct task_struct *get_push_task(struct rq *rq) 2280a7c81556SPeter Zijlstra { 2281a7c81556SPeter Zijlstra struct task_struct *p = rq->curr; 2282a7c81556SPeter Zijlstra 22835cb9eaa3SPeter Zijlstra lockdep_assert_rq_held(rq); 2284a7c81556SPeter Zijlstra 2285a7c81556SPeter Zijlstra if (rq->push_busy) 2286a7c81556SPeter Zijlstra return NULL; 2287a7c81556SPeter Zijlstra 2288a7c81556SPeter Zijlstra if (p->nr_cpus_allowed == 1) 2289a7c81556SPeter Zijlstra return NULL; 2290a7c81556SPeter Zijlstra 2291e681dcbaSSebastian Andrzej Siewior if (p->migration_disabled) 2292e681dcbaSSebastian Andrzej Siewior return NULL; 2293e681dcbaSSebastian Andrzej Siewior 2294a7c81556SPeter Zijlstra rq->push_busy = true; 2295a7c81556SPeter Zijlstra return get_task_struct(p); 2296a7c81556SPeter Zijlstra } 2297a7c81556SPeter Zijlstra 2298a7c81556SPeter Zijlstra extern int push_cpu_stop(void *arg); 2299dc877341SPeter Zijlstra 2300391e43daSPeter Zijlstra #endif 2301391e43daSPeter Zijlstra 2302442bf3aaSDaniel Lezcano #ifdef CONFIG_CPU_IDLE 2303442bf3aaSDaniel Lezcano static inline void idle_set_state(struct rq *rq, 2304442bf3aaSDaniel Lezcano struct cpuidle_state *idle_state) 2305442bf3aaSDaniel Lezcano { 2306442bf3aaSDaniel Lezcano rq->idle_state = idle_state; 2307442bf3aaSDaniel Lezcano } 2308442bf3aaSDaniel Lezcano 2309442bf3aaSDaniel Lezcano static inline struct cpuidle_state *idle_get_state(struct rq *rq) 2310442bf3aaSDaniel Lezcano { 23119148a3a1SPeter Zijlstra SCHED_WARN_ON(!rcu_read_lock_held()); 231297fb7a0aSIngo Molnar 2313442bf3aaSDaniel Lezcano return rq->idle_state; 2314442bf3aaSDaniel Lezcano } 2315442bf3aaSDaniel Lezcano #else 2316442bf3aaSDaniel Lezcano static inline void idle_set_state(struct rq *rq, 2317442bf3aaSDaniel Lezcano struct cpuidle_state *idle_state) 2318442bf3aaSDaniel Lezcano { 2319442bf3aaSDaniel Lezcano } 2320442bf3aaSDaniel Lezcano 2321442bf3aaSDaniel Lezcano static inline struct cpuidle_state *idle_get_state(struct rq *rq) 2322442bf3aaSDaniel Lezcano { 2323442bf3aaSDaniel Lezcano return NULL; 2324442bf3aaSDaniel Lezcano } 2325442bf3aaSDaniel Lezcano #endif 2326442bf3aaSDaniel Lezcano 23278663effbSSteven Rostedt (VMware) extern void schedule_idle(void); 23288663effbSSteven Rostedt (VMware) 2329391e43daSPeter Zijlstra extern void sysrq_sched_debug_show(void); 2330391e43daSPeter Zijlstra extern void sched_init_granularity(void); 2331391e43daSPeter Zijlstra extern void update_max_interval(void); 23321baca4ceSJuri Lelli 23331baca4ceSJuri Lelli extern void init_sched_dl_class(void); 2334391e43daSPeter Zijlstra extern void init_sched_rt_class(void); 2335391e43daSPeter Zijlstra extern void init_sched_fair_class(void); 2336391e43daSPeter Zijlstra 23379059393eSVincent Guittot extern void reweight_task(struct task_struct *p, int prio); 23389059393eSVincent Guittot 23398875125eSKirill Tkhai extern void resched_curr(struct rq *rq); 2340391e43daSPeter Zijlstra extern void resched_cpu(int cpu); 2341391e43daSPeter Zijlstra 2342391e43daSPeter Zijlstra extern struct rt_bandwidth def_rt_bandwidth; 2343391e43daSPeter Zijlstra extern void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime); 2344d664e399SThomas Gleixner extern bool sched_rt_bandwidth_account(struct rt_rq *rt_rq); 2345391e43daSPeter Zijlstra 2346332ac17eSDario Faggioli extern void init_dl_bandwidth(struct dl_bandwidth *dl_b, u64 period, u64 runtime); 2347aab03e05SDario Faggioli extern void init_dl_task_timer(struct sched_dl_entity *dl_se); 2348209a0cbdSLuca Abeni extern void init_dl_inactive_task_timer(struct sched_dl_entity *dl_se); 2349aab03e05SDario Faggioli 2350c52f14d3SLuca Abeni #define BW_SHIFT 20 2351c52f14d3SLuca Abeni #define BW_UNIT (1 << BW_SHIFT) 23524da3abceSLuca Abeni #define RATIO_SHIFT 8 2353d505b8afSHuaixin Chang #define MAX_BW_BITS (64 - BW_SHIFT) 2354d505b8afSHuaixin Chang #define MAX_BW ((1ULL << MAX_BW_BITS) - 1) 2355332ac17eSDario Faggioli unsigned long to_ratio(u64 period, u64 runtime); 2356332ac17eSDario Faggioli 2357540247fbSYuyang Du extern void init_entity_runnable_average(struct sched_entity *se); 2358d0fe0b9cSDietmar Eggemann extern void post_init_entity_util_avg(struct task_struct *p); 2359a75cdaa9SAlex Shi 236076d92ac3SFrederic Weisbecker #ifdef CONFIG_NO_HZ_FULL 236176d92ac3SFrederic Weisbecker extern bool sched_can_stop_tick(struct rq *rq); 2362d84b3131SFrederic Weisbecker extern int __init sched_tick_offload_init(void); 236376d92ac3SFrederic Weisbecker 236476d92ac3SFrederic Weisbecker /* 236576d92ac3SFrederic Weisbecker * Tick may be needed by tasks in the runqueue depending on their policy and 236676d92ac3SFrederic Weisbecker * requirements. If tick is needed, lets send the target an IPI to kick it out of 236776d92ac3SFrederic Weisbecker * nohz mode if necessary. 236876d92ac3SFrederic Weisbecker */ 236976d92ac3SFrederic Weisbecker static inline void sched_update_tick_dependency(struct rq *rq) 237076d92ac3SFrederic Weisbecker { 237121a6ee14SMiaohe Lin int cpu = cpu_of(rq); 237276d92ac3SFrederic Weisbecker 237376d92ac3SFrederic Weisbecker if (!tick_nohz_full_cpu(cpu)) 237476d92ac3SFrederic Weisbecker return; 237576d92ac3SFrederic Weisbecker 237676d92ac3SFrederic Weisbecker if (sched_can_stop_tick(rq)) 237776d92ac3SFrederic Weisbecker tick_nohz_dep_clear_cpu(cpu, TICK_DEP_BIT_SCHED); 237876d92ac3SFrederic Weisbecker else 237976d92ac3SFrederic Weisbecker tick_nohz_dep_set_cpu(cpu, TICK_DEP_BIT_SCHED); 238076d92ac3SFrederic Weisbecker } 238176d92ac3SFrederic Weisbecker #else 2382d84b3131SFrederic Weisbecker static inline int sched_tick_offload_init(void) { return 0; } 238376d92ac3SFrederic Weisbecker static inline void sched_update_tick_dependency(struct rq *rq) { } 238476d92ac3SFrederic Weisbecker #endif 238576d92ac3SFrederic Weisbecker 238672465447SKirill Tkhai static inline void add_nr_running(struct rq *rq, unsigned count) 2387391e43daSPeter Zijlstra { 238872465447SKirill Tkhai unsigned prev_nr = rq->nr_running; 238972465447SKirill Tkhai 239072465447SKirill Tkhai rq->nr_running = prev_nr + count; 23919d246053SPhil Auld if (trace_sched_update_nr_running_tp_enabled()) { 23929d246053SPhil Auld call_trace_sched_update_nr_running(rq, count); 23939d246053SPhil Auld } 23949f3660c2SFrederic Weisbecker 23954486edd1STim Chen #ifdef CONFIG_SMP 23963e184501SViresh Kumar if (prev_nr < 2 && rq->nr_running >= 2) { 2397e90c8fe1SValentin Schneider if (!READ_ONCE(rq->rd->overload)) 2398e90c8fe1SValentin Schneider WRITE_ONCE(rq->rd->overload, 1); 239976d92ac3SFrederic Weisbecker } 24003e184501SViresh Kumar #endif 24014486edd1STim Chen 240276d92ac3SFrederic Weisbecker sched_update_tick_dependency(rq); 24034486edd1STim Chen } 2404391e43daSPeter Zijlstra 240572465447SKirill Tkhai static inline void sub_nr_running(struct rq *rq, unsigned count) 2406391e43daSPeter Zijlstra { 240772465447SKirill Tkhai rq->nr_running -= count; 24089d246053SPhil Auld if (trace_sched_update_nr_running_tp_enabled()) { 2409a1bd0685SPhil Auld call_trace_sched_update_nr_running(rq, -count); 24109d246053SPhil Auld } 24119d246053SPhil Auld 241276d92ac3SFrederic Weisbecker /* Check if we still need preemption */ 241376d92ac3SFrederic Weisbecker sched_update_tick_dependency(rq); 2414391e43daSPeter Zijlstra } 2415391e43daSPeter Zijlstra 2416391e43daSPeter Zijlstra extern void activate_task(struct rq *rq, struct task_struct *p, int flags); 2417391e43daSPeter Zijlstra extern void deactivate_task(struct rq *rq, struct task_struct *p, int flags); 2418391e43daSPeter Zijlstra 2419391e43daSPeter Zijlstra extern void check_preempt_curr(struct rq *rq, struct task_struct *p, int flags); 2420391e43daSPeter Zijlstra 2421391e43daSPeter Zijlstra extern const_debug unsigned int sysctl_sched_nr_migrate; 2422391e43daSPeter Zijlstra extern const_debug unsigned int sysctl_sched_migration_cost; 2423391e43daSPeter Zijlstra 242418765447SHailong Liu #ifdef CONFIG_SCHED_DEBUG 242518765447SHailong Liu extern unsigned int sysctl_sched_latency; 242618765447SHailong Liu extern unsigned int sysctl_sched_min_granularity; 242751ce83edSJosh Don extern unsigned int sysctl_sched_idle_min_granularity; 242818765447SHailong Liu extern unsigned int sysctl_sched_wakeup_granularity; 242918765447SHailong Liu extern int sysctl_resched_latency_warn_ms; 243018765447SHailong Liu extern int sysctl_resched_latency_warn_once; 243118765447SHailong Liu 243218765447SHailong Liu extern unsigned int sysctl_sched_tunable_scaling; 243318765447SHailong Liu 243418765447SHailong Liu extern unsigned int sysctl_numa_balancing_scan_delay; 243518765447SHailong Liu extern unsigned int sysctl_numa_balancing_scan_period_min; 243618765447SHailong Liu extern unsigned int sysctl_numa_balancing_scan_period_max; 243718765447SHailong Liu extern unsigned int sysctl_numa_balancing_scan_size; 243818765447SHailong Liu #endif 243918765447SHailong Liu 2440391e43daSPeter Zijlstra #ifdef CONFIG_SCHED_HRTICK 2441391e43daSPeter Zijlstra 2442391e43daSPeter Zijlstra /* 2443391e43daSPeter Zijlstra * Use hrtick when: 2444391e43daSPeter Zijlstra * - enabled by features 2445391e43daSPeter Zijlstra * - hrtimer is actually high res 2446391e43daSPeter Zijlstra */ 2447391e43daSPeter Zijlstra static inline int hrtick_enabled(struct rq *rq) 2448391e43daSPeter Zijlstra { 2449391e43daSPeter Zijlstra if (!cpu_active(cpu_of(rq))) 2450391e43daSPeter Zijlstra return 0; 2451391e43daSPeter Zijlstra return hrtimer_is_hres_active(&rq->hrtick_timer); 2452391e43daSPeter Zijlstra } 2453391e43daSPeter Zijlstra 2454e0ee463cSJuri Lelli static inline int hrtick_enabled_fair(struct rq *rq) 2455e0ee463cSJuri Lelli { 2456e0ee463cSJuri Lelli if (!sched_feat(HRTICK)) 2457e0ee463cSJuri Lelli return 0; 2458e0ee463cSJuri Lelli return hrtick_enabled(rq); 2459e0ee463cSJuri Lelli } 2460e0ee463cSJuri Lelli 2461e0ee463cSJuri Lelli static inline int hrtick_enabled_dl(struct rq *rq) 2462e0ee463cSJuri Lelli { 2463e0ee463cSJuri Lelli if (!sched_feat(HRTICK_DL)) 2464e0ee463cSJuri Lelli return 0; 2465e0ee463cSJuri Lelli return hrtick_enabled(rq); 2466e0ee463cSJuri Lelli } 2467e0ee463cSJuri Lelli 2468391e43daSPeter Zijlstra void hrtick_start(struct rq *rq, u64 delay); 2469391e43daSPeter Zijlstra 2470b39e66eaSMike Galbraith #else 2471b39e66eaSMike Galbraith 2472e0ee463cSJuri Lelli static inline int hrtick_enabled_fair(struct rq *rq) 2473e0ee463cSJuri Lelli { 2474e0ee463cSJuri Lelli return 0; 2475e0ee463cSJuri Lelli } 2476e0ee463cSJuri Lelli 2477e0ee463cSJuri Lelli static inline int hrtick_enabled_dl(struct rq *rq) 2478e0ee463cSJuri Lelli { 2479e0ee463cSJuri Lelli return 0; 2480e0ee463cSJuri Lelli } 2481e0ee463cSJuri Lelli 2482b39e66eaSMike Galbraith static inline int hrtick_enabled(struct rq *rq) 2483b39e66eaSMike Galbraith { 2484b39e66eaSMike Galbraith return 0; 2485b39e66eaSMike Galbraith } 2486b39e66eaSMike Galbraith 2487391e43daSPeter Zijlstra #endif /* CONFIG_SCHED_HRTICK */ 2488391e43daSPeter Zijlstra 24891567c3e3SGiovanni Gherdovich #ifndef arch_scale_freq_tick 24901567c3e3SGiovanni Gherdovich static __always_inline 24911567c3e3SGiovanni Gherdovich void arch_scale_freq_tick(void) 24921567c3e3SGiovanni Gherdovich { 24931567c3e3SGiovanni Gherdovich } 24941567c3e3SGiovanni Gherdovich #endif 24951567c3e3SGiovanni Gherdovich 2496dfbca41fSPeter Zijlstra #ifndef arch_scale_freq_capacity 2497f4470cdfSValentin Schneider /** 2498f4470cdfSValentin Schneider * arch_scale_freq_capacity - get the frequency scale factor of a given CPU. 2499f4470cdfSValentin Schneider * @cpu: the CPU in question. 2500f4470cdfSValentin Schneider * 2501f4470cdfSValentin Schneider * Return: the frequency scale factor normalized against SCHED_CAPACITY_SCALE, i.e. 2502f4470cdfSValentin Schneider * 2503f4470cdfSValentin Schneider * f_curr 2504f4470cdfSValentin Schneider * ------ * SCHED_CAPACITY_SCALE 2505f4470cdfSValentin Schneider * f_max 2506f4470cdfSValentin Schneider */ 2507dfbca41fSPeter Zijlstra static __always_inline 25087673c8a4SJuri Lelli unsigned long arch_scale_freq_capacity(int cpu) 2509dfbca41fSPeter Zijlstra { 2510dfbca41fSPeter Zijlstra return SCHED_CAPACITY_SCALE; 2511dfbca41fSPeter Zijlstra } 2512dfbca41fSPeter Zijlstra #endif 2513b5b4860dSVincent Guittot 25142679a837SHao Jia #ifdef CONFIG_SCHED_DEBUG 25152679a837SHao Jia /* 25162679a837SHao Jia * In double_lock_balance()/double_rq_lock(), we use raw_spin_rq_lock() to 25172679a837SHao Jia * acquire rq lock instead of rq_lock(). So at the end of these two functions 25182679a837SHao Jia * we need to call double_rq_clock_clear_update() to clear RQCF_UPDATED of 25192679a837SHao Jia * rq->clock_update_flags to avoid the WARN_DOUBLE_CLOCK warning. 25202679a837SHao Jia */ 25212679a837SHao Jia static inline void double_rq_clock_clear_update(struct rq *rq1, struct rq *rq2) 25222679a837SHao Jia { 25232679a837SHao Jia rq1->clock_update_flags &= (RQCF_REQ_SKIP|RQCF_ACT_SKIP); 25242679a837SHao Jia /* rq1 == rq2 for !CONFIG_SMP, so just clear RQCF_UPDATED once. */ 25252679a837SHao Jia #ifdef CONFIG_SMP 25262679a837SHao Jia rq2->clock_update_flags &= (RQCF_REQ_SKIP|RQCF_ACT_SKIP); 25272679a837SHao Jia #endif 25282679a837SHao Jia } 25292679a837SHao Jia #else 25302679a837SHao Jia static inline void double_rq_clock_clear_update(struct rq *rq1, struct rq *rq2) {} 25312679a837SHao Jia #endif 2532391e43daSPeter Zijlstra 2533d66f1b06SPeter Zijlstra #ifdef CONFIG_SMP 2534d66f1b06SPeter Zijlstra 2535d66f1b06SPeter Zijlstra static inline bool rq_order_less(struct rq *rq1, struct rq *rq2) 2536d66f1b06SPeter Zijlstra { 25379edeaea1SPeter Zijlstra #ifdef CONFIG_SCHED_CORE 25389edeaea1SPeter Zijlstra /* 25399edeaea1SPeter Zijlstra * In order to not have {0,2},{1,3} turn into into an AB-BA, 25409edeaea1SPeter Zijlstra * order by core-id first and cpu-id second. 25419edeaea1SPeter Zijlstra * 25429edeaea1SPeter Zijlstra * Notably: 25439edeaea1SPeter Zijlstra * 25449edeaea1SPeter Zijlstra * double_rq_lock(0,3); will take core-0, core-1 lock 25459edeaea1SPeter Zijlstra * double_rq_lock(1,2); will take core-1, core-0 lock 25469edeaea1SPeter Zijlstra * 25479edeaea1SPeter Zijlstra * when only cpu-id is considered. 25489edeaea1SPeter Zijlstra */ 25499edeaea1SPeter Zijlstra if (rq1->core->cpu < rq2->core->cpu) 25509edeaea1SPeter Zijlstra return true; 25519edeaea1SPeter Zijlstra if (rq1->core->cpu > rq2->core->cpu) 25529edeaea1SPeter Zijlstra return false; 25539edeaea1SPeter Zijlstra 25549edeaea1SPeter Zijlstra /* 25559edeaea1SPeter Zijlstra * __sched_core_flip() relies on SMT having cpu-id lock order. 25569edeaea1SPeter Zijlstra */ 25579edeaea1SPeter Zijlstra #endif 2558d66f1b06SPeter Zijlstra return rq1->cpu < rq2->cpu; 2559d66f1b06SPeter Zijlstra } 2560d66f1b06SPeter Zijlstra 2561d66f1b06SPeter Zijlstra extern void double_rq_lock(struct rq *rq1, struct rq *rq2); 2562d66f1b06SPeter Zijlstra 2563d66f1b06SPeter Zijlstra #ifdef CONFIG_PREEMPTION 2564391e43daSPeter Zijlstra 2565391e43daSPeter Zijlstra /* 2566391e43daSPeter Zijlstra * fair double_lock_balance: Safely acquires both rq->locks in a fair 2567391e43daSPeter Zijlstra * way at the expense of forcing extra atomic operations in all 2568391e43daSPeter Zijlstra * invocations. This assures that the double_lock is acquired using the 2569391e43daSPeter Zijlstra * same underlying policy as the spinlock_t on this architecture, which 2570391e43daSPeter Zijlstra * reduces latency compared to the unfair variant below. However, it 2571391e43daSPeter Zijlstra * also adds more overhead and therefore may reduce throughput. 2572391e43daSPeter Zijlstra */ 2573391e43daSPeter Zijlstra static inline int _double_lock_balance(struct rq *this_rq, struct rq *busiest) 2574391e43daSPeter Zijlstra __releases(this_rq->lock) 2575391e43daSPeter Zijlstra __acquires(busiest->lock) 2576391e43daSPeter Zijlstra __acquires(this_rq->lock) 2577391e43daSPeter Zijlstra { 25785cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(this_rq); 2579391e43daSPeter Zijlstra double_rq_lock(this_rq, busiest); 2580391e43daSPeter Zijlstra 2581391e43daSPeter Zijlstra return 1; 2582391e43daSPeter Zijlstra } 2583391e43daSPeter Zijlstra 2584391e43daSPeter Zijlstra #else 2585391e43daSPeter Zijlstra /* 2586391e43daSPeter Zijlstra * Unfair double_lock_balance: Optimizes throughput at the expense of 2587391e43daSPeter Zijlstra * latency by eliminating extra atomic operations when the locks are 258897fb7a0aSIngo Molnar * already in proper order on entry. This favors lower CPU-ids and will 258997fb7a0aSIngo Molnar * grant the double lock to lower CPUs over higher ids under contention, 2590391e43daSPeter Zijlstra * regardless of entry order into the function. 2591391e43daSPeter Zijlstra */ 2592391e43daSPeter Zijlstra static inline int _double_lock_balance(struct rq *this_rq, struct rq *busiest) 2593391e43daSPeter Zijlstra __releases(this_rq->lock) 2594391e43daSPeter Zijlstra __acquires(busiest->lock) 2595391e43daSPeter Zijlstra __acquires(this_rq->lock) 2596391e43daSPeter Zijlstra { 25972679a837SHao Jia if (__rq_lockp(this_rq) == __rq_lockp(busiest) || 25982679a837SHao Jia likely(raw_spin_rq_trylock(busiest))) { 25992679a837SHao Jia double_rq_clock_clear_update(this_rq, busiest); 26005cb9eaa3SPeter Zijlstra return 0; 26012679a837SHao Jia } 26025cb9eaa3SPeter Zijlstra 2603d66f1b06SPeter Zijlstra if (rq_order_less(this_rq, busiest)) { 26045cb9eaa3SPeter Zijlstra raw_spin_rq_lock_nested(busiest, SINGLE_DEPTH_NESTING); 26052679a837SHao Jia double_rq_clock_clear_update(this_rq, busiest); 26065cb9eaa3SPeter Zijlstra return 0; 2607391e43daSPeter Zijlstra } 26085cb9eaa3SPeter Zijlstra 26095cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(this_rq); 2610d66f1b06SPeter Zijlstra double_rq_lock(this_rq, busiest); 26115cb9eaa3SPeter Zijlstra 26125cb9eaa3SPeter Zijlstra return 1; 2613391e43daSPeter Zijlstra } 2614391e43daSPeter Zijlstra 2615c1a280b6SThomas Gleixner #endif /* CONFIG_PREEMPTION */ 2616391e43daSPeter Zijlstra 2617391e43daSPeter Zijlstra /* 2618391e43daSPeter Zijlstra * double_lock_balance - lock the busiest runqueue, this_rq is locked already. 2619391e43daSPeter Zijlstra */ 2620391e43daSPeter Zijlstra static inline int double_lock_balance(struct rq *this_rq, struct rq *busiest) 2621391e43daSPeter Zijlstra { 26225cb9eaa3SPeter Zijlstra lockdep_assert_irqs_disabled(); 2623391e43daSPeter Zijlstra 2624391e43daSPeter Zijlstra return _double_lock_balance(this_rq, busiest); 2625391e43daSPeter Zijlstra } 2626391e43daSPeter Zijlstra 2627391e43daSPeter Zijlstra static inline void double_unlock_balance(struct rq *this_rq, struct rq *busiest) 2628391e43daSPeter Zijlstra __releases(busiest->lock) 2629391e43daSPeter Zijlstra { 26309ef7e7e3SPeter Zijlstra if (__rq_lockp(this_rq) != __rq_lockp(busiest)) 26315cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(busiest); 26329ef7e7e3SPeter Zijlstra lock_set_subclass(&__rq_lockp(this_rq)->dep_map, 0, _RET_IP_); 2633391e43daSPeter Zijlstra } 2634391e43daSPeter Zijlstra 263574602315SPeter Zijlstra static inline void double_lock(spinlock_t *l1, spinlock_t *l2) 263674602315SPeter Zijlstra { 263774602315SPeter Zijlstra if (l1 > l2) 263874602315SPeter Zijlstra swap(l1, l2); 263974602315SPeter Zijlstra 264074602315SPeter Zijlstra spin_lock(l1); 264174602315SPeter Zijlstra spin_lock_nested(l2, SINGLE_DEPTH_NESTING); 264274602315SPeter Zijlstra } 264374602315SPeter Zijlstra 264460e69eedSMike Galbraith static inline void double_lock_irq(spinlock_t *l1, spinlock_t *l2) 264560e69eedSMike Galbraith { 264660e69eedSMike Galbraith if (l1 > l2) 264760e69eedSMike Galbraith swap(l1, l2); 264860e69eedSMike Galbraith 264960e69eedSMike Galbraith spin_lock_irq(l1); 265060e69eedSMike Galbraith spin_lock_nested(l2, SINGLE_DEPTH_NESTING); 265160e69eedSMike Galbraith } 265260e69eedSMike Galbraith 265374602315SPeter Zijlstra static inline void double_raw_lock(raw_spinlock_t *l1, raw_spinlock_t *l2) 265474602315SPeter Zijlstra { 265574602315SPeter Zijlstra if (l1 > l2) 265674602315SPeter Zijlstra swap(l1, l2); 265774602315SPeter Zijlstra 265874602315SPeter Zijlstra raw_spin_lock(l1); 265974602315SPeter Zijlstra raw_spin_lock_nested(l2, SINGLE_DEPTH_NESTING); 266074602315SPeter Zijlstra } 266174602315SPeter Zijlstra 2662391e43daSPeter Zijlstra /* 2663391e43daSPeter Zijlstra * double_rq_unlock - safely unlock two runqueues 2664391e43daSPeter Zijlstra * 2665391e43daSPeter Zijlstra * Note this does not restore interrupts like task_rq_unlock, 2666391e43daSPeter Zijlstra * you need to do so manually after calling. 2667391e43daSPeter Zijlstra */ 2668391e43daSPeter Zijlstra static inline void double_rq_unlock(struct rq *rq1, struct rq *rq2) 2669391e43daSPeter Zijlstra __releases(rq1->lock) 2670391e43daSPeter Zijlstra __releases(rq2->lock) 2671391e43daSPeter Zijlstra { 26729ef7e7e3SPeter Zijlstra if (__rq_lockp(rq1) != __rq_lockp(rq2)) 26735cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(rq2); 2674391e43daSPeter Zijlstra else 2675391e43daSPeter Zijlstra __release(rq2->lock); 2676d66f1b06SPeter Zijlstra raw_spin_rq_unlock(rq1); 2677391e43daSPeter Zijlstra } 2678391e43daSPeter Zijlstra 2679f2cb1360SIngo Molnar extern void set_rq_online (struct rq *rq); 2680f2cb1360SIngo Molnar extern void set_rq_offline(struct rq *rq); 2681f2cb1360SIngo Molnar extern bool sched_smp_initialized; 2682f2cb1360SIngo Molnar 2683391e43daSPeter Zijlstra #else /* CONFIG_SMP */ 2684391e43daSPeter Zijlstra 2685391e43daSPeter Zijlstra /* 2686391e43daSPeter Zijlstra * double_rq_lock - safely lock two runqueues 2687391e43daSPeter Zijlstra * 2688391e43daSPeter Zijlstra * Note this does not disable interrupts like task_rq_lock, 2689391e43daSPeter Zijlstra * you need to do so manually before calling. 2690391e43daSPeter Zijlstra */ 2691391e43daSPeter Zijlstra static inline void double_rq_lock(struct rq *rq1, struct rq *rq2) 2692391e43daSPeter Zijlstra __acquires(rq1->lock) 2693391e43daSPeter Zijlstra __acquires(rq2->lock) 2694391e43daSPeter Zijlstra { 2695391e43daSPeter Zijlstra BUG_ON(!irqs_disabled()); 2696391e43daSPeter Zijlstra BUG_ON(rq1 != rq2); 26975cb9eaa3SPeter Zijlstra raw_spin_rq_lock(rq1); 2698391e43daSPeter Zijlstra __acquire(rq2->lock); /* Fake it out ;) */ 26992679a837SHao Jia double_rq_clock_clear_update(rq1, rq2); 2700391e43daSPeter Zijlstra } 2701391e43daSPeter Zijlstra 2702391e43daSPeter Zijlstra /* 2703391e43daSPeter Zijlstra * double_rq_unlock - safely unlock two runqueues 2704391e43daSPeter Zijlstra * 2705391e43daSPeter Zijlstra * Note this does not restore interrupts like task_rq_unlock, 2706391e43daSPeter Zijlstra * you need to do so manually after calling. 2707391e43daSPeter Zijlstra */ 2708391e43daSPeter Zijlstra static inline void double_rq_unlock(struct rq *rq1, struct rq *rq2) 2709391e43daSPeter Zijlstra __releases(rq1->lock) 2710391e43daSPeter Zijlstra __releases(rq2->lock) 2711391e43daSPeter Zijlstra { 2712391e43daSPeter Zijlstra BUG_ON(rq1 != rq2); 27135cb9eaa3SPeter Zijlstra raw_spin_rq_unlock(rq1); 2714391e43daSPeter Zijlstra __release(rq2->lock); 2715391e43daSPeter Zijlstra } 2716391e43daSPeter Zijlstra 2717391e43daSPeter Zijlstra #endif 2718391e43daSPeter Zijlstra 2719391e43daSPeter Zijlstra extern struct sched_entity *__pick_first_entity(struct cfs_rq *cfs_rq); 2720391e43daSPeter Zijlstra extern struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq); 27216b55c965SSrikar Dronamraju 27226b55c965SSrikar Dronamraju #ifdef CONFIG_SCHED_DEBUG 27239406415fSPeter Zijlstra extern bool sched_debug_verbose; 27249469eb01SPeter Zijlstra 2725391e43daSPeter Zijlstra extern void print_cfs_stats(struct seq_file *m, int cpu); 2726391e43daSPeter Zijlstra extern void print_rt_stats(struct seq_file *m, int cpu); 2727acb32132SWanpeng Li extern void print_dl_stats(struct seq_file *m, int cpu); 2728f6a34630SMathieu Malaterre extern void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq); 2729f6a34630SMathieu Malaterre extern void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq); 2730f6a34630SMathieu Malaterre extern void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq); 2731c006fac5SPaul Turner 2732c006fac5SPaul Turner extern void resched_latency_warn(int cpu, u64 latency); 2733397f2378SSrikar Dronamraju #ifdef CONFIG_NUMA_BALANCING 2734397f2378SSrikar Dronamraju extern void 2735397f2378SSrikar Dronamraju show_numa_stats(struct task_struct *p, struct seq_file *m); 2736397f2378SSrikar Dronamraju extern void 2737397f2378SSrikar Dronamraju print_numa_stats(struct seq_file *m, int node, unsigned long tsf, 2738397f2378SSrikar Dronamraju unsigned long tpf, unsigned long gsf, unsigned long gpf); 2739397f2378SSrikar Dronamraju #endif /* CONFIG_NUMA_BALANCING */ 2740c006fac5SPaul Turner #else 2741c006fac5SPaul Turner static inline void resched_latency_warn(int cpu, u64 latency) {} 2742397f2378SSrikar Dronamraju #endif /* CONFIG_SCHED_DEBUG */ 2743391e43daSPeter Zijlstra 2744391e43daSPeter Zijlstra extern void init_cfs_rq(struct cfs_rq *cfs_rq); 274507c54f7aSAbel Vesa extern void init_rt_rq(struct rt_rq *rt_rq); 274607c54f7aSAbel Vesa extern void init_dl_rq(struct dl_rq *dl_rq); 2747391e43daSPeter Zijlstra 27481ee14e6cSBen Segall extern void cfs_bandwidth_usage_inc(void); 27491ee14e6cSBen Segall extern void cfs_bandwidth_usage_dec(void); 27501c792db7SSuresh Siddha 27513451d024SFrederic Weisbecker #ifdef CONFIG_NO_HZ_COMMON 275200357f5eSPeter Zijlstra #define NOHZ_BALANCE_KICK_BIT 0 275300357f5eSPeter Zijlstra #define NOHZ_STATS_KICK_BIT 1 2754c6f88654SVincent Guittot #define NOHZ_NEWILB_KICK_BIT 2 2755efd984c4SValentin Schneider #define NOHZ_NEXT_KICK_BIT 3 2756a22e47a4SPeter Zijlstra 2757efd984c4SValentin Schneider /* Run rebalance_domains() */ 2758a22e47a4SPeter Zijlstra #define NOHZ_BALANCE_KICK BIT(NOHZ_BALANCE_KICK_BIT) 2759efd984c4SValentin Schneider /* Update blocked load */ 2760b7031a02SPeter Zijlstra #define NOHZ_STATS_KICK BIT(NOHZ_STATS_KICK_BIT) 2761efd984c4SValentin Schneider /* Update blocked load when entering idle */ 2762c6f88654SVincent Guittot #define NOHZ_NEWILB_KICK BIT(NOHZ_NEWILB_KICK_BIT) 2763efd984c4SValentin Schneider /* Update nohz.next_balance */ 2764efd984c4SValentin Schneider #define NOHZ_NEXT_KICK BIT(NOHZ_NEXT_KICK_BIT) 2765b7031a02SPeter Zijlstra 2766efd984c4SValentin Schneider #define NOHZ_KICK_MASK (NOHZ_BALANCE_KICK | NOHZ_STATS_KICK | NOHZ_NEXT_KICK) 27671c792db7SSuresh Siddha 27681c792db7SSuresh Siddha #define nohz_flags(cpu) (&cpu_rq(cpu)->nohz_flags) 276920a5c8ccSThomas Gleixner 277000357f5eSPeter Zijlstra extern void nohz_balance_exit_idle(struct rq *rq); 277120a5c8ccSThomas Gleixner #else 277200357f5eSPeter Zijlstra static inline void nohz_balance_exit_idle(struct rq *rq) { } 27731c792db7SSuresh Siddha #endif 277473fbec60SFrederic Weisbecker 2775c6f88654SVincent Guittot #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) 2776c6f88654SVincent Guittot extern void nohz_run_idle_balance(int cpu); 2777c6f88654SVincent Guittot #else 2778c6f88654SVincent Guittot static inline void nohz_run_idle_balance(int cpu) { } 2779c6f88654SVincent Guittot #endif 2780daec5798SLuca Abeni 278173fbec60SFrederic Weisbecker #ifdef CONFIG_IRQ_TIME_ACCOUNTING 278219d23dbfSFrederic Weisbecker struct irqtime { 278325e2d8c1SFrederic Weisbecker u64 total; 2784a499a5a1SFrederic Weisbecker u64 tick_delta; 278519d23dbfSFrederic Weisbecker u64 irq_start_time; 278619d23dbfSFrederic Weisbecker struct u64_stats_sync sync; 278719d23dbfSFrederic Weisbecker }; 278873fbec60SFrederic Weisbecker 278919d23dbfSFrederic Weisbecker DECLARE_PER_CPU(struct irqtime, cpu_irqtime); 279073fbec60SFrederic Weisbecker 279125e2d8c1SFrederic Weisbecker /* 279225e2d8c1SFrederic Weisbecker * Returns the irqtime minus the softirq time computed by ksoftirqd. 27933b03706fSIngo Molnar * Otherwise ksoftirqd's sum_exec_runtime is subtracted its own runtime 279425e2d8c1SFrederic Weisbecker * and never move forward. 279525e2d8c1SFrederic Weisbecker */ 279673fbec60SFrederic Weisbecker static inline u64 irq_time_read(int cpu) 279773fbec60SFrederic Weisbecker { 279819d23dbfSFrederic Weisbecker struct irqtime *irqtime = &per_cpu(cpu_irqtime, cpu); 279919d23dbfSFrederic Weisbecker unsigned int seq; 280019d23dbfSFrederic Weisbecker u64 total; 280173fbec60SFrederic Weisbecker 280273fbec60SFrederic Weisbecker do { 280319d23dbfSFrederic Weisbecker seq = __u64_stats_fetch_begin(&irqtime->sync); 280425e2d8c1SFrederic Weisbecker total = irqtime->total; 280519d23dbfSFrederic Weisbecker } while (__u64_stats_fetch_retry(&irqtime->sync, seq)); 280673fbec60SFrederic Weisbecker 280719d23dbfSFrederic Weisbecker return total; 280873fbec60SFrederic Weisbecker } 280973fbec60SFrederic Weisbecker #endif /* CONFIG_IRQ_TIME_ACCOUNTING */ 2810adaf9fcdSRafael J. Wysocki 2811adaf9fcdSRafael J. Wysocki #ifdef CONFIG_CPU_FREQ 2812b10abd0aSJoel Fernandes (Google) DECLARE_PER_CPU(struct update_util_data __rcu *, cpufreq_update_util_data); 2813adaf9fcdSRafael J. Wysocki 2814adaf9fcdSRafael J. Wysocki /** 2815adaf9fcdSRafael J. Wysocki * cpufreq_update_util - Take a note about CPU utilization changes. 281612bde33dSRafael J. Wysocki * @rq: Runqueue to carry out the update for. 281758919e83SRafael J. Wysocki * @flags: Update reason flags. 2818adaf9fcdSRafael J. Wysocki * 281958919e83SRafael J. Wysocki * This function is called by the scheduler on the CPU whose utilization is 282058919e83SRafael J. Wysocki * being updated. 2821adaf9fcdSRafael J. Wysocki * 2822adaf9fcdSRafael J. Wysocki * It can only be called from RCU-sched read-side critical sections. 2823adaf9fcdSRafael J. Wysocki * 2824adaf9fcdSRafael J. Wysocki * The way cpufreq is currently arranged requires it to evaluate the CPU 2825adaf9fcdSRafael J. Wysocki * performance state (frequency/voltage) on a regular basis to prevent it from 2826adaf9fcdSRafael J. Wysocki * being stuck in a completely inadequate performance level for too long. 2827e0367b12SJuri Lelli * That is not guaranteed to happen if the updates are only triggered from CFS 2828e0367b12SJuri Lelli * and DL, though, because they may not be coming in if only RT tasks are 2829e0367b12SJuri Lelli * active all the time (or there are RT tasks only). 2830adaf9fcdSRafael J. Wysocki * 2831e0367b12SJuri Lelli * As a workaround for that issue, this function is called periodically by the 2832e0367b12SJuri Lelli * RT sched class to trigger extra cpufreq updates to prevent it from stalling, 2833adaf9fcdSRafael J. Wysocki * but that really is a band-aid. Going forward it should be replaced with 2834e0367b12SJuri Lelli * solutions targeted more specifically at RT tasks. 2835adaf9fcdSRafael J. Wysocki */ 283612bde33dSRafael J. Wysocki static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) 2837adaf9fcdSRafael J. Wysocki { 283858919e83SRafael J. Wysocki struct update_util_data *data; 283958919e83SRafael J. Wysocki 2840674e7541SViresh Kumar data = rcu_dereference_sched(*per_cpu_ptr(&cpufreq_update_util_data, 2841674e7541SViresh Kumar cpu_of(rq))); 284258919e83SRafael J. Wysocki if (data) 284312bde33dSRafael J. Wysocki data->func(data, rq_clock(rq), flags); 284412bde33dSRafael J. Wysocki } 2845adaf9fcdSRafael J. Wysocki #else 284612bde33dSRafael J. Wysocki static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {} 2847adaf9fcdSRafael J. Wysocki #endif /* CONFIG_CPU_FREQ */ 2848be53f58fSLinus Torvalds 28499bdcb44eSRafael J. Wysocki #ifdef arch_scale_freq_capacity 28509bdcb44eSRafael J. Wysocki # ifndef arch_scale_freq_invariant 285197fb7a0aSIngo Molnar # define arch_scale_freq_invariant() true 28529bdcb44eSRafael J. Wysocki # endif 285397fb7a0aSIngo Molnar #else 285497fb7a0aSIngo Molnar # define arch_scale_freq_invariant() false 28559bdcb44eSRafael J. Wysocki #endif 2856d4edd662SJuri Lelli 285710a35e68SVincent Guittot #ifdef CONFIG_SMP 285810a35e68SVincent Guittot static inline unsigned long capacity_orig_of(int cpu) 285910a35e68SVincent Guittot { 286010a35e68SVincent Guittot return cpu_rq(cpu)->cpu_capacity_orig; 286110a35e68SVincent Guittot } 286210a35e68SVincent Guittot 2863938e5e4bSQuentin Perret /** 2864a5418be9SViresh Kumar * enum cpu_util_type - CPU utilization type 2865938e5e4bSQuentin Perret * @FREQUENCY_UTIL: Utilization used to select frequency 2866938e5e4bSQuentin Perret * @ENERGY_UTIL: Utilization used during energy calculation 2867938e5e4bSQuentin Perret * 2868938e5e4bSQuentin Perret * The utilization signals of all scheduling classes (CFS/RT/DL) and IRQ time 2869938e5e4bSQuentin Perret * need to be aggregated differently depending on the usage made of them. This 2870a5418be9SViresh Kumar * enum is used within effective_cpu_util() to differentiate the types of 2871938e5e4bSQuentin Perret * utilization expected by the callers, and adjust the aggregation accordingly. 2872938e5e4bSQuentin Perret */ 2873a5418be9SViresh Kumar enum cpu_util_type { 2874938e5e4bSQuentin Perret FREQUENCY_UTIL, 2875938e5e4bSQuentin Perret ENERGY_UTIL, 2876938e5e4bSQuentin Perret }; 2877938e5e4bSQuentin Perret 2878a5418be9SViresh Kumar unsigned long effective_cpu_util(int cpu, unsigned long util_cfs, 2879a5418be9SViresh Kumar unsigned long max, enum cpu_util_type type, 2880af24bde8SPatrick Bellasi struct task_struct *p); 2881938e5e4bSQuentin Perret 28828cc90515SVincent Guittot static inline unsigned long cpu_bw_dl(struct rq *rq) 2883d4edd662SJuri Lelli { 2884d4edd662SJuri Lelli return (rq->dl.running_bw * SCHED_CAPACITY_SCALE) >> BW_SHIFT; 2885d4edd662SJuri Lelli } 2886d4edd662SJuri Lelli 28878cc90515SVincent Guittot static inline unsigned long cpu_util_dl(struct rq *rq) 28888cc90515SVincent Guittot { 28898cc90515SVincent Guittot return READ_ONCE(rq->avg_dl.util_avg); 28908cc90515SVincent Guittot } 28918cc90515SVincent Guittot 289282762d2aSDietmar Eggemann /** 289382762d2aSDietmar Eggemann * cpu_util_cfs() - Estimates the amount of CPU capacity used by CFS tasks. 289482762d2aSDietmar Eggemann * @cpu: the CPU to get the utilization for. 289582762d2aSDietmar Eggemann * 289682762d2aSDietmar Eggemann * The unit of the return value must be the same as the one of CPU capacity 289782762d2aSDietmar Eggemann * so that CPU utilization can be compared with CPU capacity. 289882762d2aSDietmar Eggemann * 289982762d2aSDietmar Eggemann * CPU utilization is the sum of running time of runnable tasks plus the 290082762d2aSDietmar Eggemann * recent utilization of currently non-runnable tasks on that CPU. 290182762d2aSDietmar Eggemann * It represents the amount of CPU capacity currently used by CFS tasks in 290282762d2aSDietmar Eggemann * the range [0..max CPU capacity] with max CPU capacity being the CPU 290382762d2aSDietmar Eggemann * capacity at f_max. 290482762d2aSDietmar Eggemann * 290582762d2aSDietmar Eggemann * The estimated CPU utilization is defined as the maximum between CPU 290682762d2aSDietmar Eggemann * utilization and sum of the estimated utilization of the currently 290782762d2aSDietmar Eggemann * runnable tasks on that CPU. It preserves a utilization "snapshot" of 290882762d2aSDietmar Eggemann * previously-executed tasks, which helps better deduce how busy a CPU will 290982762d2aSDietmar Eggemann * be when a long-sleeping task wakes up. The contribution to CPU utilization 291082762d2aSDietmar Eggemann * of such a task would be significantly decayed at this point of time. 291182762d2aSDietmar Eggemann * 291282762d2aSDietmar Eggemann * CPU utilization can be higher than the current CPU capacity 291382762d2aSDietmar Eggemann * (f_curr/f_max * max CPU capacity) or even the max CPU capacity because 291482762d2aSDietmar Eggemann * of rounding errors as well as task migrations or wakeups of new tasks. 291582762d2aSDietmar Eggemann * CPU utilization has to be capped to fit into the [0..max CPU capacity] 291682762d2aSDietmar Eggemann * range. Otherwise a group of CPUs (CPU0 util = 121% + CPU1 util = 80%) 291782762d2aSDietmar Eggemann * could be seen as over-utilized even though CPU1 has 20% of spare CPU 291882762d2aSDietmar Eggemann * capacity. CPU utilization is allowed to overshoot current CPU capacity 291982762d2aSDietmar Eggemann * though since this is useful for predicting the CPU capacity required 292082762d2aSDietmar Eggemann * after task migrations (scheduler-driven DVFS). 292182762d2aSDietmar Eggemann * 292282762d2aSDietmar Eggemann * Return: (Estimated) utilization for the specified CPU. 292382762d2aSDietmar Eggemann */ 292482762d2aSDietmar Eggemann static inline unsigned long cpu_util_cfs(int cpu) 2925d4edd662SJuri Lelli { 292682762d2aSDietmar Eggemann struct cfs_rq *cfs_rq; 292782762d2aSDietmar Eggemann unsigned long util; 292882762d2aSDietmar Eggemann 292982762d2aSDietmar Eggemann cfs_rq = &cpu_rq(cpu)->cfs; 293082762d2aSDietmar Eggemann util = READ_ONCE(cfs_rq->avg.util_avg); 2931a07630b8SPatrick Bellasi 2932a07630b8SPatrick Bellasi if (sched_feat(UTIL_EST)) { 2933a07630b8SPatrick Bellasi util = max_t(unsigned long, util, 293482762d2aSDietmar Eggemann READ_ONCE(cfs_rq->avg.util_est.enqueued)); 2935a07630b8SPatrick Bellasi } 2936a07630b8SPatrick Bellasi 293782762d2aSDietmar Eggemann return min(util, capacity_orig_of(cpu)); 2938d4edd662SJuri Lelli } 2939371bf427SVincent Guittot 2940371bf427SVincent Guittot static inline unsigned long cpu_util_rt(struct rq *rq) 2941371bf427SVincent Guittot { 2942dfa444dcSVincent Guittot return READ_ONCE(rq->avg_rt.util_avg); 2943371bf427SVincent Guittot } 29447d6a905fSViresh Kumar #endif 29459033ea11SVincent Guittot 29467a17e1dbSQais Yousef #ifdef CONFIG_UCLAMP_TASK 29477a17e1dbSQais Yousef unsigned long uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id); 29487a17e1dbSQais Yousef 29497a17e1dbSQais Yousef /** 29507a17e1dbSQais Yousef * uclamp_rq_util_with - clamp @util with @rq and @p effective uclamp values. 29517a17e1dbSQais Yousef * @rq: The rq to clamp against. Must not be NULL. 29527a17e1dbSQais Yousef * @util: The util value to clamp. 29537a17e1dbSQais Yousef * @p: The task to clamp against. Can be NULL if you want to clamp 29547a17e1dbSQais Yousef * against @rq only. 29557a17e1dbSQais Yousef * 29567a17e1dbSQais Yousef * Clamps the passed @util to the max(@rq, @p) effective uclamp values. 29577a17e1dbSQais Yousef * 29587a17e1dbSQais Yousef * If sched_uclamp_used static key is disabled, then just return the util 29597a17e1dbSQais Yousef * without any clamping since uclamp aggregation at the rq level in the fast 29607a17e1dbSQais Yousef * path is disabled, rendering this operation a NOP. 29617a17e1dbSQais Yousef * 29627a17e1dbSQais Yousef * Use uclamp_eff_value() if you don't care about uclamp values at rq level. It 29637a17e1dbSQais Yousef * will return the correct effective uclamp value of the task even if the 29647a17e1dbSQais Yousef * static key is disabled. 29657a17e1dbSQais Yousef */ 29667a17e1dbSQais Yousef static __always_inline 29677a17e1dbSQais Yousef unsigned long uclamp_rq_util_with(struct rq *rq, unsigned long util, 29687a17e1dbSQais Yousef struct task_struct *p) 29697a17e1dbSQais Yousef { 29707a17e1dbSQais Yousef unsigned long min_util = 0; 29717a17e1dbSQais Yousef unsigned long max_util = 0; 29727a17e1dbSQais Yousef 29737a17e1dbSQais Yousef if (!static_branch_likely(&sched_uclamp_used)) 29747a17e1dbSQais Yousef return util; 29757a17e1dbSQais Yousef 29767a17e1dbSQais Yousef if (p) { 29777a17e1dbSQais Yousef min_util = uclamp_eff_value(p, UCLAMP_MIN); 29787a17e1dbSQais Yousef max_util = uclamp_eff_value(p, UCLAMP_MAX); 29797a17e1dbSQais Yousef 29807a17e1dbSQais Yousef /* 29817a17e1dbSQais Yousef * Ignore last runnable task's max clamp, as this task will 29827a17e1dbSQais Yousef * reset it. Similarly, no need to read the rq's min clamp. 29837a17e1dbSQais Yousef */ 29847a17e1dbSQais Yousef if (rq->uclamp_flags & UCLAMP_FLAG_IDLE) 29857a17e1dbSQais Yousef goto out; 29867a17e1dbSQais Yousef } 29877a17e1dbSQais Yousef 29887a17e1dbSQais Yousef min_util = max_t(unsigned long, min_util, READ_ONCE(rq->uclamp[UCLAMP_MIN].value)); 29897a17e1dbSQais Yousef max_util = max_t(unsigned long, max_util, READ_ONCE(rq->uclamp[UCLAMP_MAX].value)); 29907a17e1dbSQais Yousef out: 29917a17e1dbSQais Yousef /* 29927a17e1dbSQais Yousef * Since CPU's {min,max}_util clamps are MAX aggregated considering 29937a17e1dbSQais Yousef * RUNNABLE tasks with _different_ clamps, we can end up with an 29947a17e1dbSQais Yousef * inversion. Fix it now when the clamps are applied. 29957a17e1dbSQais Yousef */ 29967a17e1dbSQais Yousef if (unlikely(min_util >= max_util)) 29977a17e1dbSQais Yousef return min_util; 29987a17e1dbSQais Yousef 29997a17e1dbSQais Yousef return clamp(util, min_util, max_util); 30007a17e1dbSQais Yousef } 30017a17e1dbSQais Yousef 30027a17e1dbSQais Yousef /* Is the rq being capped/throttled by uclamp_max? */ 30037a17e1dbSQais Yousef static inline bool uclamp_rq_is_capped(struct rq *rq) 30047a17e1dbSQais Yousef { 30057a17e1dbSQais Yousef unsigned long rq_util; 30067a17e1dbSQais Yousef unsigned long max_util; 30077a17e1dbSQais Yousef 30087a17e1dbSQais Yousef if (!static_branch_likely(&sched_uclamp_used)) 30097a17e1dbSQais Yousef return false; 30107a17e1dbSQais Yousef 30117a17e1dbSQais Yousef rq_util = cpu_util_cfs(cpu_of(rq)) + cpu_util_rt(rq); 30127a17e1dbSQais Yousef max_util = READ_ONCE(rq->uclamp[UCLAMP_MAX].value); 30137a17e1dbSQais Yousef 30147a17e1dbSQais Yousef return max_util != SCHED_CAPACITY_SCALE && rq_util >= max_util; 30157a17e1dbSQais Yousef } 30167a17e1dbSQais Yousef 30177a17e1dbSQais Yousef /* 30187a17e1dbSQais Yousef * When uclamp is compiled in, the aggregation at rq level is 'turned off' 30197a17e1dbSQais Yousef * by default in the fast path and only gets turned on once userspace performs 30207a17e1dbSQais Yousef * an operation that requires it. 30217a17e1dbSQais Yousef * 30227a17e1dbSQais Yousef * Returns true if userspace opted-in to use uclamp and aggregation at rq level 30237a17e1dbSQais Yousef * hence is active. 30247a17e1dbSQais Yousef */ 30257a17e1dbSQais Yousef static inline bool uclamp_is_used(void) 30267a17e1dbSQais Yousef { 30277a17e1dbSQais Yousef return static_branch_likely(&sched_uclamp_used); 30287a17e1dbSQais Yousef } 30297a17e1dbSQais Yousef #else /* CONFIG_UCLAMP_TASK */ 30307a17e1dbSQais Yousef static inline 30317a17e1dbSQais Yousef unsigned long uclamp_rq_util_with(struct rq *rq, unsigned long util, 30327a17e1dbSQais Yousef struct task_struct *p) 30337a17e1dbSQais Yousef { 30347a17e1dbSQais Yousef return util; 30357a17e1dbSQais Yousef } 30367a17e1dbSQais Yousef 30377a17e1dbSQais Yousef static inline bool uclamp_rq_is_capped(struct rq *rq) { return false; } 30387a17e1dbSQais Yousef 30397a17e1dbSQais Yousef static inline bool uclamp_is_used(void) 30407a17e1dbSQais Yousef { 30417a17e1dbSQais Yousef return false; 30427a17e1dbSQais Yousef } 30437a17e1dbSQais Yousef #endif /* CONFIG_UCLAMP_TASK */ 30447a17e1dbSQais Yousef 304511d4afd4SVincent Guittot #ifdef CONFIG_HAVE_SCHED_AVG_IRQ 30469033ea11SVincent Guittot static inline unsigned long cpu_util_irq(struct rq *rq) 30479033ea11SVincent Guittot { 30489033ea11SVincent Guittot return rq->avg_irq.util_avg; 30499033ea11SVincent Guittot } 30502e62c474SVincent Guittot 30512e62c474SVincent Guittot static inline 30522e62c474SVincent Guittot unsigned long scale_irq_capacity(unsigned long util, unsigned long irq, unsigned long max) 30532e62c474SVincent Guittot { 30542e62c474SVincent Guittot util *= (max - irq); 30552e62c474SVincent Guittot util /= max; 30562e62c474SVincent Guittot 30572e62c474SVincent Guittot return util; 30582e62c474SVincent Guittot 30592e62c474SVincent Guittot } 30609033ea11SVincent Guittot #else 30619033ea11SVincent Guittot static inline unsigned long cpu_util_irq(struct rq *rq) 30629033ea11SVincent Guittot { 30639033ea11SVincent Guittot return 0; 30649033ea11SVincent Guittot } 30659033ea11SVincent Guittot 30662e62c474SVincent Guittot static inline 30672e62c474SVincent Guittot unsigned long scale_irq_capacity(unsigned long util, unsigned long irq, unsigned long max) 30682e62c474SVincent Guittot { 30692e62c474SVincent Guittot return util; 30702e62c474SVincent Guittot } 3071794a56ebSJuri Lelli #endif 30726aa140faSQuentin Perret 3073531b5c9fSQuentin Perret #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) 30741f74de87SQuentin Perret 3075f8a696f2SPeter Zijlstra #define perf_domain_span(pd) (to_cpumask(((pd)->em_pd->cpus))) 3076f8a696f2SPeter Zijlstra 3077f8a696f2SPeter Zijlstra DECLARE_STATIC_KEY_FALSE(sched_energy_present); 3078f8a696f2SPeter Zijlstra 3079f8a696f2SPeter Zijlstra static inline bool sched_energy_enabled(void) 3080f8a696f2SPeter Zijlstra { 3081f8a696f2SPeter Zijlstra return static_branch_unlikely(&sched_energy_present); 3082f8a696f2SPeter Zijlstra } 3083f8a696f2SPeter Zijlstra 3084f8a696f2SPeter Zijlstra #else /* ! (CONFIG_ENERGY_MODEL && CONFIG_CPU_FREQ_GOV_SCHEDUTIL) */ 3085f8a696f2SPeter Zijlstra 3086f8a696f2SPeter Zijlstra #define perf_domain_span(pd) NULL 3087f8a696f2SPeter Zijlstra static inline bool sched_energy_enabled(void) { return false; } 3088f8a696f2SPeter Zijlstra 3089f8a696f2SPeter Zijlstra #endif /* CONFIG_ENERGY_MODEL && CONFIG_CPU_FREQ_GOV_SCHEDUTIL */ 3090227a4aadSMathieu Desnoyers 3091227a4aadSMathieu Desnoyers #ifdef CONFIG_MEMBARRIER 3092227a4aadSMathieu Desnoyers /* 3093227a4aadSMathieu Desnoyers * The scheduler provides memory barriers required by membarrier between: 3094227a4aadSMathieu Desnoyers * - prior user-space memory accesses and store to rq->membarrier_state, 3095227a4aadSMathieu Desnoyers * - store to rq->membarrier_state and following user-space memory accesses. 3096227a4aadSMathieu Desnoyers * In the same way it provides those guarantees around store to rq->curr. 3097227a4aadSMathieu Desnoyers */ 3098227a4aadSMathieu Desnoyers static inline void membarrier_switch_mm(struct rq *rq, 3099227a4aadSMathieu Desnoyers struct mm_struct *prev_mm, 3100227a4aadSMathieu Desnoyers struct mm_struct *next_mm) 3101227a4aadSMathieu Desnoyers { 3102227a4aadSMathieu Desnoyers int membarrier_state; 3103227a4aadSMathieu Desnoyers 3104227a4aadSMathieu Desnoyers if (prev_mm == next_mm) 3105227a4aadSMathieu Desnoyers return; 3106227a4aadSMathieu Desnoyers 3107227a4aadSMathieu Desnoyers membarrier_state = atomic_read(&next_mm->membarrier_state); 3108227a4aadSMathieu Desnoyers if (READ_ONCE(rq->membarrier_state) == membarrier_state) 3109227a4aadSMathieu Desnoyers return; 3110227a4aadSMathieu Desnoyers 3111227a4aadSMathieu Desnoyers WRITE_ONCE(rq->membarrier_state, membarrier_state); 3112227a4aadSMathieu Desnoyers } 3113227a4aadSMathieu Desnoyers #else 3114227a4aadSMathieu Desnoyers static inline void membarrier_switch_mm(struct rq *rq, 3115227a4aadSMathieu Desnoyers struct mm_struct *prev_mm, 3116227a4aadSMathieu Desnoyers struct mm_struct *next_mm) 3117227a4aadSMathieu Desnoyers { 3118227a4aadSMathieu Desnoyers } 3119227a4aadSMathieu Desnoyers #endif 312052262ee5SMel Gorman 312152262ee5SMel Gorman #ifdef CONFIG_SMP 312252262ee5SMel Gorman static inline bool is_per_cpu_kthread(struct task_struct *p) 312352262ee5SMel Gorman { 312452262ee5SMel Gorman if (!(p->flags & PF_KTHREAD)) 312552262ee5SMel Gorman return false; 312652262ee5SMel Gorman 312752262ee5SMel Gorman if (p->nr_cpus_allowed != 1) 312852262ee5SMel Gorman return false; 312952262ee5SMel Gorman 313052262ee5SMel Gorman return true; 313152262ee5SMel Gorman } 313252262ee5SMel Gorman #endif 3133b3212fe2SThomas Gleixner 31341011dcceSPeter Zijlstra extern void swake_up_all_locked(struct swait_queue_head *q); 31351011dcceSPeter Zijlstra extern void __prepare_to_swait(struct swait_queue_head *q, struct swait_queue *wait); 31361011dcceSPeter Zijlstra 31371011dcceSPeter Zijlstra #ifdef CONFIG_PREEMPT_DYNAMIC 31381011dcceSPeter Zijlstra extern int preempt_dynamic_mode; 31391011dcceSPeter Zijlstra extern int sched_dynamic_mode(const char *str); 31401011dcceSPeter Zijlstra extern void sched_dynamic_update(int mode); 31411011dcceSPeter Zijlstra #endif 31421011dcceSPeter Zijlstra 314395458477SIngo Molnar #endif /* _KERNEL_SCHED_SCHED_H */ 3144