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 * @flags: the timers flags 52 */ 53 TRACE_EVENT(timer_start, 54 55 TP_PROTO(struct timer_list *timer, 56 unsigned long expires, 57 unsigned int flags), 58 59 TP_ARGS(timer, expires, flags), 60 61 TP_STRUCT__entry( 62 __field( void *, timer ) 63 __field( void *, function ) 64 __field( unsigned long, expires ) 65 __field( unsigned long, now ) 66 __field( unsigned int, flags ) 67 ), 68 69 TP_fast_assign( 70 __entry->timer = timer; 71 __entry->function = timer->function; 72 __entry->expires = expires; 73 __entry->now = jiffies; 74 __entry->flags = flags; 75 ), 76 77 TP_printk("timer=%p function=%ps expires=%lu [timeout=%ld] cpu=%u idx=%u flags=%s", 78 __entry->timer, __entry->function, __entry->expires, 79 (long)__entry->expires - __entry->now, 80 __entry->flags & TIMER_CPUMASK, 81 __entry->flags >> TIMER_ARRAYSHIFT, 82 decode_timer_flags(__entry->flags & TIMER_TRACE_FLAGMASK)) 83 ); 84 85 /** 86 * timer_expire_entry - called immediately before the timer callback 87 * @timer: pointer to struct timer_list 88 * @baseclk: value of timer_base::clk when timer expires 89 * 90 * Allows to determine the timer latency. 91 */ 92 TRACE_EVENT(timer_expire_entry, 93 94 TP_PROTO(struct timer_list *timer, unsigned long baseclk), 95 96 TP_ARGS(timer, baseclk), 97 98 TP_STRUCT__entry( 99 __field( void *, timer ) 100 __field( unsigned long, now ) 101 __field( void *, function) 102 __field( unsigned long, baseclk ) 103 ), 104 105 TP_fast_assign( 106 __entry->timer = timer; 107 __entry->now = jiffies; 108 __entry->function = timer->function; 109 __entry->baseclk = baseclk; 110 ), 111 112 TP_printk("timer=%p function=%ps now=%lu baseclk=%lu", 113 __entry->timer, __entry->function, __entry->now, 114 __entry->baseclk) 115 ); 116 117 /** 118 * timer_expire_exit - called immediately after the timer callback returns 119 * @timer: pointer to struct timer_list 120 * 121 * When used in combination with the timer_expire_entry tracepoint we can 122 * determine the runtime of the timer callback function. 123 * 124 * NOTE: Do NOT dereference timer in TP_fast_assign. The pointer might 125 * be invalid. We solely track the pointer. 126 */ 127 DEFINE_EVENT(timer_class, timer_expire_exit, 128 129 TP_PROTO(struct timer_list *timer), 130 131 TP_ARGS(timer) 132 ); 133 134 /** 135 * timer_cancel - called when the timer is canceled 136 * @timer: pointer to struct timer_list 137 */ 138 DEFINE_EVENT(timer_class, timer_cancel, 139 140 TP_PROTO(struct timer_list *timer), 141 142 TP_ARGS(timer) 143 ); 144 145 #define decode_clockid(type) \ 146 __print_symbolic(type, \ 147 { CLOCK_REALTIME, "CLOCK_REALTIME" }, \ 148 { CLOCK_MONOTONIC, "CLOCK_MONOTONIC" }, \ 149 { CLOCK_BOOTTIME, "CLOCK_BOOTTIME" }, \ 150 { CLOCK_TAI, "CLOCK_TAI" }) 151 152 #define decode_hrtimer_mode(mode) \ 153 __print_symbolic(mode, \ 154 { HRTIMER_MODE_ABS, "ABS" }, \ 155 { HRTIMER_MODE_REL, "REL" }, \ 156 { HRTIMER_MODE_ABS_PINNED, "ABS|PINNED" }, \ 157 { HRTIMER_MODE_REL_PINNED, "REL|PINNED" }, \ 158 { HRTIMER_MODE_ABS_SOFT, "ABS|SOFT" }, \ 159 { HRTIMER_MODE_REL_SOFT, "REL|SOFT" }, \ 160 { HRTIMER_MODE_ABS_PINNED_SOFT, "ABS|PINNED|SOFT" }, \ 161 { HRTIMER_MODE_REL_PINNED_SOFT, "REL|PINNED|SOFT" }) 162 163 /** 164 * hrtimer_init - called when the hrtimer is initialized 165 * @hrtimer: pointer to struct hrtimer 166 * @clockid: the hrtimers clock 167 * @mode: the hrtimers mode 168 */ 169 TRACE_EVENT(hrtimer_init, 170 171 TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid, 172 enum hrtimer_mode mode), 173 174 TP_ARGS(hrtimer, clockid, mode), 175 176 TP_STRUCT__entry( 177 __field( void *, hrtimer ) 178 __field( clockid_t, clockid ) 179 __field( enum hrtimer_mode, mode ) 180 ), 181 182 TP_fast_assign( 183 __entry->hrtimer = hrtimer; 184 __entry->clockid = clockid; 185 __entry->mode = mode; 186 ), 187 188 TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer, 189 decode_clockid(__entry->clockid), 190 decode_hrtimer_mode(__entry->mode)) 191 ); 192 193 /** 194 * hrtimer_start - called when the hrtimer is started 195 * @hrtimer: pointer to struct hrtimer 196 * @mode: the hrtimers mode 197 */ 198 TRACE_EVENT(hrtimer_start, 199 200 TP_PROTO(struct hrtimer *hrtimer, enum hrtimer_mode mode), 201 202 TP_ARGS(hrtimer, mode), 203 204 TP_STRUCT__entry( 205 __field( void *, hrtimer ) 206 __field( void *, function ) 207 __field( s64, expires ) 208 __field( s64, softexpires ) 209 __field( enum hrtimer_mode, mode ) 210 ), 211 212 TP_fast_assign( 213 __entry->hrtimer = hrtimer; 214 __entry->function = hrtimer->function; 215 __entry->expires = hrtimer_get_expires(hrtimer); 216 __entry->softexpires = hrtimer_get_softexpires(hrtimer); 217 __entry->mode = mode; 218 ), 219 220 TP_printk("hrtimer=%p function=%ps expires=%llu softexpires=%llu " 221 "mode=%s", __entry->hrtimer, __entry->function, 222 (unsigned long long) __entry->expires, 223 (unsigned long long) __entry->softexpires, 224 decode_hrtimer_mode(__entry->mode)) 225 ); 226 227 /** 228 * hrtimer_expire_entry - called immediately before the hrtimer callback 229 * @hrtimer: pointer to struct hrtimer 230 * @now: pointer to variable which contains current time of the 231 * timers base. 232 * 233 * Allows to determine the timer latency. 234 */ 235 TRACE_EVENT(hrtimer_expire_entry, 236 237 TP_PROTO(struct hrtimer *hrtimer, ktime_t *now), 238 239 TP_ARGS(hrtimer, now), 240 241 TP_STRUCT__entry( 242 __field( void *, hrtimer ) 243 __field( s64, now ) 244 __field( void *, function) 245 ), 246 247 TP_fast_assign( 248 __entry->hrtimer = hrtimer; 249 __entry->now = *now; 250 __entry->function = hrtimer->function; 251 ), 252 253 TP_printk("hrtimer=%p function=%ps now=%llu", 254 __entry->hrtimer, __entry->function, 255 (unsigned long long) __entry->now) 256 ); 257 258 DECLARE_EVENT_CLASS(hrtimer_class, 259 260 TP_PROTO(struct hrtimer *hrtimer), 261 262 TP_ARGS(hrtimer), 263 264 TP_STRUCT__entry( 265 __field( void *, hrtimer ) 266 ), 267 268 TP_fast_assign( 269 __entry->hrtimer = hrtimer; 270 ), 271 272 TP_printk("hrtimer=%p", __entry->hrtimer) 273 ); 274 275 /** 276 * hrtimer_expire_exit - called immediately after the hrtimer callback returns 277 * @hrtimer: pointer to struct hrtimer 278 * 279 * When used in combination with the hrtimer_expire_entry tracepoint we can 280 * determine the runtime of the callback function. 281 */ 282 DEFINE_EVENT(hrtimer_class, hrtimer_expire_exit, 283 284 TP_PROTO(struct hrtimer *hrtimer), 285 286 TP_ARGS(hrtimer) 287 ); 288 289 /** 290 * hrtimer_cancel - called when the hrtimer is canceled 291 * @hrtimer: pointer to struct hrtimer 292 */ 293 DEFINE_EVENT(hrtimer_class, hrtimer_cancel, 294 295 TP_PROTO(struct hrtimer *hrtimer), 296 297 TP_ARGS(hrtimer) 298 ); 299 300 /** 301 * itimer_state - called when itimer is started or canceled 302 * @which: name of the interval timer 303 * @value: the itimers value, itimer is canceled if value->it_value is 304 * zero, otherwise it is started 305 * @expires: the itimers expiry time 306 */ 307 TRACE_EVENT(itimer_state, 308 309 TP_PROTO(int which, const struct itimerspec64 *const value, 310 unsigned long long expires), 311 312 TP_ARGS(which, value, expires), 313 314 TP_STRUCT__entry( 315 __field( int, which ) 316 __field( unsigned long long, expires ) 317 __field( long, value_sec ) 318 __field( long, value_nsec ) 319 __field( long, interval_sec ) 320 __field( long, interval_nsec ) 321 ), 322 323 TP_fast_assign( 324 __entry->which = which; 325 __entry->expires = expires; 326 __entry->value_sec = value->it_value.tv_sec; 327 __entry->value_nsec = value->it_value.tv_nsec; 328 __entry->interval_sec = value->it_interval.tv_sec; 329 __entry->interval_nsec = value->it_interval.tv_nsec; 330 ), 331 332 TP_printk("which=%d expires=%llu it_value=%ld.%06ld it_interval=%ld.%06ld", 333 __entry->which, __entry->expires, 334 __entry->value_sec, __entry->value_nsec / NSEC_PER_USEC, 335 __entry->interval_sec, __entry->interval_nsec / NSEC_PER_USEC) 336 ); 337 338 /** 339 * itimer_expire - called when itimer expires 340 * @which: type of the interval timer 341 * @pid: pid of the process which owns the timer 342 * @now: current time, used to calculate the latency of itimer 343 */ 344 TRACE_EVENT(itimer_expire, 345 346 TP_PROTO(int which, struct pid *pid, unsigned long long now), 347 348 TP_ARGS(which, pid, now), 349 350 TP_STRUCT__entry( 351 __field( int , which ) 352 __field( pid_t, pid ) 353 __field( unsigned long long, now ) 354 ), 355 356 TP_fast_assign( 357 __entry->which = which; 358 __entry->now = now; 359 __entry->pid = pid_nr(pid); 360 ), 361 362 TP_printk("which=%d pid=%d now=%llu", __entry->which, 363 (int) __entry->pid, __entry->now) 364 ); 365 366 #ifdef CONFIG_NO_HZ_COMMON 367 368 #define TICK_DEP_NAMES \ 369 tick_dep_mask_name(NONE) \ 370 tick_dep_name(POSIX_TIMER) \ 371 tick_dep_name(PERF_EVENTS) \ 372 tick_dep_name(SCHED) \ 373 tick_dep_name(CLOCK_UNSTABLE) \ 374 tick_dep_name(RCU) \ 375 tick_dep_name_end(RCU_EXP) 376 377 #undef tick_dep_name 378 #undef tick_dep_mask_name 379 #undef tick_dep_name_end 380 381 /* The MASK will convert to their bits and they need to be processed too */ 382 #define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \ 383 TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); 384 #define tick_dep_name_end(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \ 385 TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); 386 /* NONE only has a mask defined for it */ 387 #define tick_dep_mask_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); 388 389 TICK_DEP_NAMES 390 391 #undef tick_dep_name 392 #undef tick_dep_mask_name 393 #undef tick_dep_name_end 394 395 #define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep }, 396 #define tick_dep_mask_name(sdep) { TICK_DEP_MASK_##sdep, #sdep }, 397 #define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep } 398 399 #define show_tick_dep_name(val) \ 400 __print_symbolic(val, TICK_DEP_NAMES) 401 402 TRACE_EVENT(tick_stop, 403 404 TP_PROTO(int success, int dependency), 405 406 TP_ARGS(success, dependency), 407 408 TP_STRUCT__entry( 409 __field( int , success ) 410 __field( int , dependency ) 411 ), 412 413 TP_fast_assign( 414 __entry->success = success; 415 __entry->dependency = dependency; 416 ), 417 418 TP_printk("success=%d dependency=%s", __entry->success, \ 419 show_tick_dep_name(__entry->dependency)) 420 ); 421 #endif 422 423 #endif /* _TRACE_TIMER_H */ 424 425 /* This part must be outside protection */ 426 #include <trace/define_trace.h> 427