1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #undef TRACE_SYSTEM 3 #define TRACE_SYSTEM timer 4 5 #if !defined(_TRACE_TIMER_H) || defined(TRACE_HEADER_MULTI_READ) 6 #define _TRACE_TIMER_H 7 8 #include <linux/tracepoint.h> 9 #include <linux/hrtimer.h> 10 #include <linux/timer.h> 11 12 DECLARE_EVENT_CLASS(timer_class, 13 14 TP_PROTO(struct timer_list *timer), 15 16 TP_ARGS(timer), 17 18 TP_STRUCT__entry( 19 __field( void *, timer ) 20 ), 21 22 TP_fast_assign( 23 __entry->timer = timer; 24 ), 25 26 TP_printk("timer=%p", __entry->timer) 27 ); 28 29 /** 30 * timer_init - called when the timer is initialized 31 * @timer: pointer to struct timer_list 32 */ 33 DEFINE_EVENT(timer_class, timer_init, 34 35 TP_PROTO(struct timer_list *timer), 36 37 TP_ARGS(timer) 38 ); 39 40 #define decode_timer_flags(flags) \ 41 __print_flags(flags, "|", \ 42 { TIMER_MIGRATING, "M" }, \ 43 { TIMER_DEFERRABLE, "D" }, \ 44 { TIMER_PINNED, "P" }, \ 45 { TIMER_IRQSAFE, "I" }) 46 47 /** 48 * timer_start - called when the timer is started 49 * @timer: pointer to struct timer_list 50 * @expires: the timers expiry time 51 */ 52 TRACE_EVENT(timer_start, 53 54 TP_PROTO(struct timer_list *timer, 55 unsigned long expires, 56 unsigned int flags), 57 58 TP_ARGS(timer, expires, flags), 59 60 TP_STRUCT__entry( 61 __field( void *, timer ) 62 __field( void *, function ) 63 __field( unsigned long, expires ) 64 __field( unsigned long, now ) 65 __field( unsigned int, flags ) 66 ), 67 68 TP_fast_assign( 69 __entry->timer = timer; 70 __entry->function = timer->function; 71 __entry->expires = expires; 72 __entry->now = jiffies; 73 __entry->flags = flags; 74 ), 75 76 TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld] cpu=%u idx=%u flags=%s", 77 __entry->timer, __entry->function, __entry->expires, 78 (long)__entry->expires - __entry->now, 79 __entry->flags & TIMER_CPUMASK, 80 __entry->flags >> TIMER_ARRAYSHIFT, 81 decode_timer_flags(__entry->flags & TIMER_TRACE_FLAGMASK)) 82 ); 83 84 /** 85 * timer_expire_entry - called immediately before the timer callback 86 * @timer: pointer to struct timer_list 87 * 88 * Allows to determine the timer latency. 89 */ 90 TRACE_EVENT(timer_expire_entry, 91 92 TP_PROTO(struct timer_list *timer), 93 94 TP_ARGS(timer), 95 96 TP_STRUCT__entry( 97 __field( void *, timer ) 98 __field( unsigned long, now ) 99 __field( void *, function) 100 ), 101 102 TP_fast_assign( 103 __entry->timer = timer; 104 __entry->now = jiffies; 105 __entry->function = timer->function; 106 ), 107 108 TP_printk("timer=%p function=%pf now=%lu", __entry->timer, __entry->function,__entry->now) 109 ); 110 111 /** 112 * timer_expire_exit - called immediately after the timer callback returns 113 * @timer: pointer to struct timer_list 114 * 115 * When used in combination with the timer_expire_entry tracepoint we can 116 * determine the runtime of the timer callback function. 117 * 118 * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might 119 * be invalid. We solely track the pointer. 120 */ 121 DEFINE_EVENT(timer_class, timer_expire_exit, 122 123 TP_PROTO(struct timer_list *timer), 124 125 TP_ARGS(timer) 126 ); 127 128 /** 129 * timer_cancel - called when the timer is canceled 130 * @timer: pointer to struct timer_list 131 */ 132 DEFINE_EVENT(timer_class, timer_cancel, 133 134 TP_PROTO(struct timer_list *timer), 135 136 TP_ARGS(timer) 137 ); 138 139 /** 140 * hrtimer_init - called when the hrtimer is initialized 141 * @hrtimer: pointer to struct hrtimer 142 * @clockid: the hrtimers clock 143 * @mode: the hrtimers mode 144 */ 145 TRACE_EVENT(hrtimer_init, 146 147 TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid, 148 enum hrtimer_mode mode), 149 150 TP_ARGS(hrtimer, clockid, mode), 151 152 TP_STRUCT__entry( 153 __field( void *, hrtimer ) 154 __field( clockid_t, clockid ) 155 __field( enum hrtimer_mode, mode ) 156 ), 157 158 TP_fast_assign( 159 __entry->hrtimer = hrtimer; 160 __entry->clockid = clockid; 161 __entry->mode = mode; 162 ), 163 164 TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer, 165 __entry->clockid == CLOCK_REALTIME ? 166 "CLOCK_REALTIME" : "CLOCK_MONOTONIC", 167 __entry->mode == HRTIMER_MODE_ABS ? 168 "HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL") 169 ); 170 171 /** 172 * hrtimer_start - called when the hrtimer is started 173 * @hrtimer: pointer to struct hrtimer 174 */ 175 TRACE_EVENT(hrtimer_start, 176 177 TP_PROTO(struct hrtimer *hrtimer), 178 179 TP_ARGS(hrtimer), 180 181 TP_STRUCT__entry( 182 __field( void *, hrtimer ) 183 __field( void *, function ) 184 __field( s64, expires ) 185 __field( s64, softexpires ) 186 ), 187 188 TP_fast_assign( 189 __entry->hrtimer = hrtimer; 190 __entry->function = hrtimer->function; 191 __entry->expires = hrtimer_get_expires(hrtimer); 192 __entry->softexpires = hrtimer_get_softexpires(hrtimer); 193 ), 194 195 TP_printk("hrtimer=%p function=%pf expires=%llu softexpires=%llu", 196 __entry->hrtimer, __entry->function, 197 (unsigned long long) __entry->expires, 198 (unsigned long long) __entry->softexpires) 199 ); 200 201 /** 202 * hrtimer_expire_entry - called immediately before the hrtimer callback 203 * @hrtimer: pointer to struct hrtimer 204 * @now: pointer to variable which contains current time of the 205 * timers base. 206 * 207 * Allows to determine the timer latency. 208 */ 209 TRACE_EVENT(hrtimer_expire_entry, 210 211 TP_PROTO(struct hrtimer *hrtimer, ktime_t *now), 212 213 TP_ARGS(hrtimer, now), 214 215 TP_STRUCT__entry( 216 __field( void *, hrtimer ) 217 __field( s64, now ) 218 __field( void *, function) 219 ), 220 221 TP_fast_assign( 222 __entry->hrtimer = hrtimer; 223 __entry->now = *now; 224 __entry->function = hrtimer->function; 225 ), 226 227 TP_printk("hrtimer=%p function=%pf now=%llu", __entry->hrtimer, __entry->function, 228 (unsigned long long) __entry->now) 229 ); 230 231 DECLARE_EVENT_CLASS(hrtimer_class, 232 233 TP_PROTO(struct hrtimer *hrtimer), 234 235 TP_ARGS(hrtimer), 236 237 TP_STRUCT__entry( 238 __field( void *, hrtimer ) 239 ), 240 241 TP_fast_assign( 242 __entry->hrtimer = hrtimer; 243 ), 244 245 TP_printk("hrtimer=%p", __entry->hrtimer) 246 ); 247 248 /** 249 * hrtimer_expire_exit - called immediately after the hrtimer callback returns 250 * @hrtimer: pointer to struct hrtimer 251 * 252 * When used in combination with the hrtimer_expire_entry tracepoint we can 253 * determine the runtime of the callback function. 254 */ 255 DEFINE_EVENT(hrtimer_class, hrtimer_expire_exit, 256 257 TP_PROTO(struct hrtimer *hrtimer), 258 259 TP_ARGS(hrtimer) 260 ); 261 262 /** 263 * hrtimer_cancel - called when the hrtimer is canceled 264 * @hrtimer: pointer to struct hrtimer 265 */ 266 DEFINE_EVENT(hrtimer_class, hrtimer_cancel, 267 268 TP_PROTO(struct hrtimer *hrtimer), 269 270 TP_ARGS(hrtimer) 271 ); 272 273 /** 274 * itimer_state - called when itimer is started or canceled 275 * @which: name of the interval timer 276 * @value: the itimers value, itimer is canceled if value->it_value is 277 * zero, otherwise it is started 278 * @expires: the itimers expiry time 279 */ 280 TRACE_EVENT(itimer_state, 281 282 TP_PROTO(int which, const struct itimerval *const value, 283 unsigned long long expires), 284 285 TP_ARGS(which, value, expires), 286 287 TP_STRUCT__entry( 288 __field( int, which ) 289 __field( unsigned long long, expires ) 290 __field( long, value_sec ) 291 __field( long, value_usec ) 292 __field( long, interval_sec ) 293 __field( long, interval_usec ) 294 ), 295 296 TP_fast_assign( 297 __entry->which = which; 298 __entry->expires = expires; 299 __entry->value_sec = value->it_value.tv_sec; 300 __entry->value_usec = value->it_value.tv_usec; 301 __entry->interval_sec = value->it_interval.tv_sec; 302 __entry->interval_usec = value->it_interval.tv_usec; 303 ), 304 305 TP_printk("which=%d expires=%llu it_value=%ld.%ld it_interval=%ld.%ld", 306 __entry->which, __entry->expires, 307 __entry->value_sec, __entry->value_usec, 308 __entry->interval_sec, __entry->interval_usec) 309 ); 310 311 /** 312 * itimer_expire - called when itimer expires 313 * @which: type of the interval timer 314 * @pid: pid of the process which owns the timer 315 * @now: current time, used to calculate the latency of itimer 316 */ 317 TRACE_EVENT(itimer_expire, 318 319 TP_PROTO(int which, struct pid *pid, unsigned long long now), 320 321 TP_ARGS(which, pid, now), 322 323 TP_STRUCT__entry( 324 __field( int , which ) 325 __field( pid_t, pid ) 326 __field( unsigned long long, now ) 327 ), 328 329 TP_fast_assign( 330 __entry->which = which; 331 __entry->now = now; 332 __entry->pid = pid_nr(pid); 333 ), 334 335 TP_printk("which=%d pid=%d now=%llu", __entry->which, 336 (int) __entry->pid, __entry->now) 337 ); 338 339 #ifdef CONFIG_NO_HZ_COMMON 340 341 #define TICK_DEP_NAMES \ 342 tick_dep_mask_name(NONE) \ 343 tick_dep_name(POSIX_TIMER) \ 344 tick_dep_name(PERF_EVENTS) \ 345 tick_dep_name(SCHED) \ 346 tick_dep_name_end(CLOCK_UNSTABLE) 347 348 #undef tick_dep_name 349 #undef tick_dep_mask_name 350 #undef tick_dep_name_end 351 352 /* The MASK will convert to their bits and they need to be processed too */ 353 #define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \ 354 TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); 355 #define tick_dep_name_end(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \ 356 TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); 357 /* NONE only has a mask defined for it */ 358 #define tick_dep_mask_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); 359 360 TICK_DEP_NAMES 361 362 #undef tick_dep_name 363 #undef tick_dep_mask_name 364 #undef tick_dep_name_end 365 366 #define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep }, 367 #define tick_dep_mask_name(sdep) { TICK_DEP_MASK_##sdep, #sdep }, 368 #define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep } 369 370 #define show_tick_dep_name(val) \ 371 __print_symbolic(val, TICK_DEP_NAMES) 372 373 TRACE_EVENT(tick_stop, 374 375 TP_PROTO(int success, int dependency), 376 377 TP_ARGS(success, dependency), 378 379 TP_STRUCT__entry( 380 __field( int , success ) 381 __field( int , dependency ) 382 ), 383 384 TP_fast_assign( 385 __entry->success = success; 386 __entry->dependency = dependency; 387 ), 388 389 TP_printk("success=%d dependency=%s", __entry->success, \ 390 show_tick_dep_name(__entry->dependency)) 391 ); 392 #endif 393 394 #endif /* _TRACE_TIMER_H */ 395 396 /* This part must be outside protection */ 397 #include <trace/define_trace.h> 398