1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc. 4 */ 5 6 #ifndef __CPUIDLE_INFO_HW__ 7 #define __CPUIDLE_INFO_HW__ 8 9 #include <stdarg.h> 10 #include <time.h> 11 12 #include "idle_monitor/idle_monitors.h" 13 14 #define MONITORS_MAX 20 15 #define MONITOR_NAME_LEN 20 16 17 /* CSTATE_NAME_LEN is limited by header field width defined 18 * in cpupower-monitor.c. Header field width is defined to be 19 * sum of percent width and two spaces for padding. 20 */ 21 #ifdef __powerpc__ 22 #define CSTATE_NAME_LEN 7 23 #else 24 #define CSTATE_NAME_LEN 5 25 #endif 26 #define CSTATE_DESC_LEN 60 27 28 int cpu_count; 29 30 /* Hard to define the right names ...: */ 31 enum power_range_e { 32 RANGE_THREAD, /* Lowest in topology hierarcy, AMD: core, Intel: thread 33 kernel sysfs: cpu */ 34 RANGE_CORE, /* AMD: unit, Intel: core, kernel_sysfs: core_id */ 35 RANGE_PACKAGE, /* Package, processor socket */ 36 RANGE_MACHINE, /* Machine, platform wide */ 37 RANGE_MAX }; 38 39 typedef struct cstate { 40 int id; 41 enum power_range_e range; 42 char name[CSTATE_NAME_LEN]; 43 char desc[CSTATE_DESC_LEN]; 44 45 /* either provide a percentage or a general count */ 46 int (*get_count_percent)(unsigned int self_id, double *percent, 47 unsigned int cpu); 48 int (*get_count)(unsigned int self_id, unsigned long long *count, 49 unsigned int cpu); 50 } cstate_t; 51 52 struct cpuidle_monitor { 53 /* Name must not contain whitespaces */ 54 char name[MONITOR_NAME_LEN]; 55 int name_len; 56 int hw_states_num; 57 cstate_t *hw_states; 58 int (*start) (void); 59 int (*stop) (void); 60 struct cpuidle_monitor* (*do_register) (void); 61 void (*unregister)(void); 62 unsigned int overflow_s; 63 struct { 64 unsigned int needs_root:1; 65 unsigned int per_cpu_schedule:1; 66 } flags; 67 }; 68 69 extern long long timespec_diff_us(struct timespec start, struct timespec end); 70 71 #define print_overflow_err(mes, ov) \ 72 { \ 73 fprintf(stderr, gettext("Measure took %u seconds, but registers could " \ 74 "overflow at %u seconds, results " \ 75 "could be inaccurate\n"), mes, ov); \ 76 } 77 78 79 /* Taken over from x86info project sources -> return 0 on success */ 80 #include <sched.h> 81 #include <sys/types.h> 82 #include <unistd.h> 83 static inline int bind_cpu(int cpu) 84 { 85 cpu_set_t set; 86 87 if (sched_getaffinity(getpid(), sizeof(set), &set) == 0) { 88 CPU_ZERO(&set); 89 CPU_SET(cpu, &set); 90 return sched_setaffinity(getpid(), sizeof(set), &set); 91 } 92 return 1; 93 } 94 95 #endif /* __CPUIDLE_INFO_HW__ */ 96