1 /* SPDX-License-Identifier: GPL-2.0 */
3 #define TRACE_SYSTEM sched
5 #if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
8 #include <linux/sched/numa_balancing.h>
9 #include <linux/tracepoint.h>
10 #include <linux/binfmts.h>
13 * Tracepoint for calling kthread_stop, performed to end a kthread:
15 TRACE_EVENT(sched_kthread_stop
,
17 TP_PROTO(struct task_struct
*t
),
22 __array( char, comm
, TASK_COMM_LEN
)
27 memcpy(__entry
->comm
, t
->comm
, TASK_COMM_LEN
);
28 __entry
->pid
= t
->pid
;
31 TP_printk("comm=%s pid=%d", __entry
->comm
, __entry
->pid
)
35 * Tracepoint for the return value of the kthread stopping:
37 TRACE_EVENT(sched_kthread_stop_ret
,
51 TP_printk("ret=%d", __entry
->ret
)
55 * Tracepoint for waking up a task:
57 DECLARE_EVENT_CLASS(sched_wakeup_template
,
59 TP_PROTO(struct task_struct
*p
),
61 TP_ARGS(__perf_task(p
)),
64 __array( char, comm
, TASK_COMM_LEN
)
67 __field( int, success
)
68 __field( int, target_cpu
)
72 memcpy(__entry
->comm
, p
->comm
, TASK_COMM_LEN
);
73 __entry
->pid
= p
->pid
;
74 __entry
->prio
= p
->prio
; /* XXX SCHED_DEADLINE */
75 __entry
->success
= 1; /* rudiment, kill when possible */
76 __entry
->target_cpu
= task_cpu(p
);
79 TP_printk("comm=%s pid=%d prio=%d target_cpu=%03d",
80 __entry
->comm
, __entry
->pid
, __entry
->prio
,
85 * Tracepoint called when waking a task; this tracepoint is guaranteed to be
86 * called from the waking context.
88 DEFINE_EVENT(sched_wakeup_template
, sched_waking
,
89 TP_PROTO(struct task_struct
*p
),
93 * Tracepoint called when the task is actually woken; p->state == TASK_RUNNNG.
94 * It it not always called from the waking context.
96 DEFINE_EVENT(sched_wakeup_template
, sched_wakeup
,
97 TP_PROTO(struct task_struct
*p
),
101 * Tracepoint for waking up a new task:
103 DEFINE_EVENT(sched_wakeup_template
, sched_wakeup_new
,
104 TP_PROTO(struct task_struct
*p
),
107 #ifdef CREATE_TRACE_POINTS
108 static inline long __trace_sched_switch_state(bool preempt
, struct task_struct
*p
)
112 #ifdef CONFIG_SCHED_DEBUG
113 BUG_ON(p
!= current
);
114 #endif /* CONFIG_SCHED_DEBUG */
117 * Preemption ignores task state, therefore preempted tasks are always
118 * RUNNING (we will not have dequeued if state != RUNNING).
121 return TASK_REPORT_MAX
;
124 * task_state_index() uses fls() and returns a value from 0-8 range.
125 * Decrement it by 1 (except TASK_RUNNING state i.e 0) before using
126 * it for left shift operation to get the correct task->state
129 state
= task_state_index(p
);
131 return state
? (1 << (state
- 1)) : state
;
133 #endif /* CREATE_TRACE_POINTS */
136 * Tracepoint for task switches, performed by the scheduler:
138 TRACE_EVENT(sched_switch
,
140 TP_PROTO(bool preempt
,
141 struct task_struct
*prev
,
142 struct task_struct
*next
),
144 TP_ARGS(preempt
, prev
, next
),
147 __array( char, prev_comm
, TASK_COMM_LEN
)
148 __field( pid_t
, prev_pid
)
149 __field( int, prev_prio
)
150 __field( long, prev_state
)
151 __array( char, next_comm
, TASK_COMM_LEN
)
152 __field( pid_t
, next_pid
)
153 __field( int, next_prio
)
157 memcpy(__entry
->next_comm
, next
->comm
, TASK_COMM_LEN
);
158 __entry
->prev_pid
= prev
->pid
;
159 __entry
->prev_prio
= prev
->prio
;
160 __entry
->prev_state
= __trace_sched_switch_state(preempt
, prev
);
161 memcpy(__entry
->prev_comm
, prev
->comm
, TASK_COMM_LEN
);
162 __entry
->next_pid
= next
->pid
;
163 __entry
->next_prio
= next
->prio
;
164 /* XXX SCHED_DEADLINE */
167 TP_printk("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%s%s ==> next_comm=%s next_pid=%d next_prio=%d",
168 __entry
->prev_comm
, __entry
->prev_pid
, __entry
->prev_prio
,
170 (__entry
->prev_state
& (TASK_REPORT_MAX
- 1)) ?
171 __print_flags(__entry
->prev_state
& (TASK_REPORT_MAX
- 1), "|",
172 { TASK_INTERRUPTIBLE
, "S" },
173 { TASK_UNINTERRUPTIBLE
, "D" },
174 { __TASK_STOPPED
, "T" },
175 { __TASK_TRACED
, "t" },
177 { EXIT_ZOMBIE
, "Z" },
178 { TASK_PARKED
, "P" },
179 { TASK_DEAD
, "I" }) :
182 __entry
->prev_state
& TASK_REPORT_MAX
? "+" : "",
183 __entry
->next_comm
, __entry
->next_pid
, __entry
->next_prio
)
187 * Tracepoint for a task being migrated:
189 TRACE_EVENT(sched_migrate_task
,
191 TP_PROTO(struct task_struct
*p
, int dest_cpu
),
193 TP_ARGS(p
, dest_cpu
),
196 __array( char, comm
, TASK_COMM_LEN
)
197 __field( pid_t
, pid
)
199 __field( int, orig_cpu
)
200 __field( int, dest_cpu
)
204 memcpy(__entry
->comm
, p
->comm
, TASK_COMM_LEN
);
205 __entry
->pid
= p
->pid
;
206 __entry
->prio
= p
->prio
; /* XXX SCHED_DEADLINE */
207 __entry
->orig_cpu
= task_cpu(p
);
208 __entry
->dest_cpu
= dest_cpu
;
211 TP_printk("comm=%s pid=%d prio=%d orig_cpu=%d dest_cpu=%d",
212 __entry
->comm
, __entry
->pid
, __entry
->prio
,
213 __entry
->orig_cpu
, __entry
->dest_cpu
)
216 DECLARE_EVENT_CLASS(sched_process_template
,
218 TP_PROTO(struct task_struct
*p
),
223 __array( char, comm
, TASK_COMM_LEN
)
224 __field( pid_t
, pid
)
229 memcpy(__entry
->comm
, p
->comm
, TASK_COMM_LEN
);
230 __entry
->pid
= p
->pid
;
231 __entry
->prio
= p
->prio
; /* XXX SCHED_DEADLINE */
234 TP_printk("comm=%s pid=%d prio=%d",
235 __entry
->comm
, __entry
->pid
, __entry
->prio
)
239 * Tracepoint for freeing a task:
241 DEFINE_EVENT(sched_process_template
, sched_process_free
,
242 TP_PROTO(struct task_struct
*p
),
246 * Tracepoint for a task exiting:
248 DEFINE_EVENT(sched_process_template
, sched_process_exit
,
249 TP_PROTO(struct task_struct
*p
),
253 * Tracepoint for waiting on task to unschedule:
255 DEFINE_EVENT(sched_process_template
, sched_wait_task
,
256 TP_PROTO(struct task_struct
*p
),
260 * Tracepoint for a waiting task:
262 TRACE_EVENT(sched_process_wait
,
264 TP_PROTO(struct pid
*pid
),
269 __array( char, comm
, TASK_COMM_LEN
)
270 __field( pid_t
, pid
)
275 memcpy(__entry
->comm
, current
->comm
, TASK_COMM_LEN
);
276 __entry
->pid
= pid_nr(pid
);
277 __entry
->prio
= current
->prio
; /* XXX SCHED_DEADLINE */
280 TP_printk("comm=%s pid=%d prio=%d",
281 __entry
->comm
, __entry
->pid
, __entry
->prio
)
285 * Tracepoint for do_fork:
287 TRACE_EVENT(sched_process_fork
,
289 TP_PROTO(struct task_struct
*parent
, struct task_struct
*child
),
291 TP_ARGS(parent
, child
),
294 __array( char, parent_comm
, TASK_COMM_LEN
)
295 __field( pid_t
, parent_pid
)
296 __array( char, child_comm
, TASK_COMM_LEN
)
297 __field( pid_t
, child_pid
)
301 memcpy(__entry
->parent_comm
, parent
->comm
, TASK_COMM_LEN
);
302 __entry
->parent_pid
= parent
->pid
;
303 memcpy(__entry
->child_comm
, child
->comm
, TASK_COMM_LEN
);
304 __entry
->child_pid
= child
->pid
;
307 TP_printk("comm=%s pid=%d child_comm=%s child_pid=%d",
308 __entry
->parent_comm
, __entry
->parent_pid
,
309 __entry
->child_comm
, __entry
->child_pid
)
313 * Tracepoint for exec:
315 TRACE_EVENT(sched_process_exec
,
317 TP_PROTO(struct task_struct
*p
, pid_t old_pid
,
318 struct linux_binprm
*bprm
),
320 TP_ARGS(p
, old_pid
, bprm
),
323 __string( filename
, bprm
->filename
)
324 __field( pid_t
, pid
)
325 __field( pid_t
, old_pid
)
329 __assign_str(filename
, bprm
->filename
);
330 __entry
->pid
= p
->pid
;
331 __entry
->old_pid
= old_pid
;
334 TP_printk("filename=%s pid=%d old_pid=%d", __get_str(filename
),
335 __entry
->pid
, __entry
->old_pid
)
339 #ifdef CONFIG_SCHEDSTATS
340 #define DEFINE_EVENT_SCHEDSTAT DEFINE_EVENT
341 #define DECLARE_EVENT_CLASS_SCHEDSTAT DECLARE_EVENT_CLASS
343 #define DEFINE_EVENT_SCHEDSTAT DEFINE_EVENT_NOP
344 #define DECLARE_EVENT_CLASS_SCHEDSTAT DECLARE_EVENT_CLASS_NOP
348 * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
349 * adding sched_stat support to SCHED_FIFO/RR would be welcome.
351 DECLARE_EVENT_CLASS_SCHEDSTAT(sched_stat_template
,
353 TP_PROTO(struct task_struct
*tsk
, u64 delay
),
355 TP_ARGS(__perf_task(tsk
), __perf_count(delay
)),
358 __array( char, comm
, TASK_COMM_LEN
)
359 __field( pid_t
, pid
)
360 __field( u64
, delay
)
364 memcpy(__entry
->comm
, tsk
->comm
, TASK_COMM_LEN
);
365 __entry
->pid
= tsk
->pid
;
366 __entry
->delay
= delay
;
369 TP_printk("comm=%s pid=%d delay=%Lu [ns]",
370 __entry
->comm
, __entry
->pid
,
371 (unsigned long long)__entry
->delay
)
375 * Tracepoint for accounting wait time (time the task is runnable
376 * but not actually running due to scheduler contention).
378 DEFINE_EVENT_SCHEDSTAT(sched_stat_template
, sched_stat_wait
,
379 TP_PROTO(struct task_struct
*tsk
, u64 delay
),
380 TP_ARGS(tsk
, delay
));
383 * Tracepoint for accounting sleep time (time the task is not runnable,
384 * including iowait, see below).
386 DEFINE_EVENT_SCHEDSTAT(sched_stat_template
, sched_stat_sleep
,
387 TP_PROTO(struct task_struct
*tsk
, u64 delay
),
388 TP_ARGS(tsk
, delay
));
391 * Tracepoint for accounting iowait time (time the task is not runnable
392 * due to waiting on IO to complete).
394 DEFINE_EVENT_SCHEDSTAT(sched_stat_template
, sched_stat_iowait
,
395 TP_PROTO(struct task_struct
*tsk
, u64 delay
),
396 TP_ARGS(tsk
, delay
));
399 * Tracepoint for accounting blocked time (time the task is in uninterruptible).
401 DEFINE_EVENT_SCHEDSTAT(sched_stat_template
, sched_stat_blocked
,
402 TP_PROTO(struct task_struct
*tsk
, u64 delay
),
403 TP_ARGS(tsk
, delay
));
406 * Tracepoint for accounting runtime (time the task is executing
409 DECLARE_EVENT_CLASS(sched_stat_runtime
,
411 TP_PROTO(struct task_struct
*tsk
, u64 runtime
, u64 vruntime
),
413 TP_ARGS(tsk
, __perf_count(runtime
), vruntime
),
416 __array( char, comm
, TASK_COMM_LEN
)
417 __field( pid_t
, pid
)
418 __field( u64
, runtime
)
419 __field( u64
, vruntime
)
423 memcpy(__entry
->comm
, tsk
->comm
, TASK_COMM_LEN
);
424 __entry
->pid
= tsk
->pid
;
425 __entry
->runtime
= runtime
;
426 __entry
->vruntime
= vruntime
;
429 TP_printk("comm=%s pid=%d runtime=%Lu [ns] vruntime=%Lu [ns]",
430 __entry
->comm
, __entry
->pid
,
431 (unsigned long long)__entry
->runtime
,
432 (unsigned long long)__entry
->vruntime
)
435 DEFINE_EVENT(sched_stat_runtime
, sched_stat_runtime
,
436 TP_PROTO(struct task_struct
*tsk
, u64 runtime
, u64 vruntime
),
437 TP_ARGS(tsk
, runtime
, vruntime
));
440 * Tracepoint for showing priority inheritance modifying a tasks
443 TRACE_EVENT(sched_pi_setprio
,
445 TP_PROTO(struct task_struct
*tsk
, struct task_struct
*pi_task
),
447 TP_ARGS(tsk
, pi_task
),
450 __array( char, comm
, TASK_COMM_LEN
)
451 __field( pid_t
, pid
)
452 __field( int, oldprio
)
453 __field( int, newprio
)
457 memcpy(__entry
->comm
, tsk
->comm
, TASK_COMM_LEN
);
458 __entry
->pid
= tsk
->pid
;
459 __entry
->oldprio
= tsk
->prio
;
460 __entry
->newprio
= pi_task
?
461 min(tsk
->normal_prio
, pi_task
->prio
) :
463 /* XXX SCHED_DEADLINE bits missing */
466 TP_printk("comm=%s pid=%d oldprio=%d newprio=%d",
467 __entry
->comm
, __entry
->pid
,
468 __entry
->oldprio
, __entry
->newprio
)
471 #ifdef CONFIG_DETECT_HUNG_TASK
472 TRACE_EVENT(sched_process_hang
,
473 TP_PROTO(struct task_struct
*tsk
),
477 __array( char, comm
, TASK_COMM_LEN
)
478 __field( pid_t
, pid
)
482 memcpy(__entry
->comm
, tsk
->comm
, TASK_COMM_LEN
);
483 __entry
->pid
= tsk
->pid
;
486 TP_printk("comm=%s pid=%d", __entry
->comm
, __entry
->pid
)
488 #endif /* CONFIG_DETECT_HUNG_TASK */
490 DECLARE_EVENT_CLASS(sched_move_task_template
,
492 TP_PROTO(struct task_struct
*tsk
, int src_cpu
, int dst_cpu
),
494 TP_ARGS(tsk
, src_cpu
, dst_cpu
),
497 __field( pid_t
, pid
)
498 __field( pid_t
, tgid
)
499 __field( pid_t
, ngid
)
500 __field( int, src_cpu
)
501 __field( int, src_nid
)
502 __field( int, dst_cpu
)
503 __field( int, dst_nid
)
507 __entry
->pid
= task_pid_nr(tsk
);
508 __entry
->tgid
= task_tgid_nr(tsk
);
509 __entry
->ngid
= task_numa_group_id(tsk
);
510 __entry
->src_cpu
= src_cpu
;
511 __entry
->src_nid
= cpu_to_node(src_cpu
);
512 __entry
->dst_cpu
= dst_cpu
;
513 __entry
->dst_nid
= cpu_to_node(dst_cpu
);
516 TP_printk("pid=%d tgid=%d ngid=%d src_cpu=%d src_nid=%d dst_cpu=%d dst_nid=%d",
517 __entry
->pid
, __entry
->tgid
, __entry
->ngid
,
518 __entry
->src_cpu
, __entry
->src_nid
,
519 __entry
->dst_cpu
, __entry
->dst_nid
)
523 * Tracks migration of tasks from one runqueue to another. Can be used to
524 * detect if automatic NUMA balancing is bouncing between nodes
526 DEFINE_EVENT(sched_move_task_template
, sched_move_numa
,
527 TP_PROTO(struct task_struct
*tsk
, int src_cpu
, int dst_cpu
),
529 TP_ARGS(tsk
, src_cpu
, dst_cpu
)
532 DEFINE_EVENT(sched_move_task_template
, sched_stick_numa
,
533 TP_PROTO(struct task_struct
*tsk
, int src_cpu
, int dst_cpu
),
535 TP_ARGS(tsk
, src_cpu
, dst_cpu
)
538 TRACE_EVENT(sched_swap_numa
,
540 TP_PROTO(struct task_struct
*src_tsk
, int src_cpu
,
541 struct task_struct
*dst_tsk
, int dst_cpu
),
543 TP_ARGS(src_tsk
, src_cpu
, dst_tsk
, dst_cpu
),
546 __field( pid_t
, src_pid
)
547 __field( pid_t
, src_tgid
)
548 __field( pid_t
, src_ngid
)
549 __field( int, src_cpu
)
550 __field( int, src_nid
)
551 __field( pid_t
, dst_pid
)
552 __field( pid_t
, dst_tgid
)
553 __field( pid_t
, dst_ngid
)
554 __field( int, dst_cpu
)
555 __field( int, dst_nid
)
559 __entry
->src_pid
= task_pid_nr(src_tsk
);
560 __entry
->src_tgid
= task_tgid_nr(src_tsk
);
561 __entry
->src_ngid
= task_numa_group_id(src_tsk
);
562 __entry
->src_cpu
= src_cpu
;
563 __entry
->src_nid
= cpu_to_node(src_cpu
);
564 __entry
->dst_pid
= task_pid_nr(dst_tsk
);
565 __entry
->dst_tgid
= task_tgid_nr(dst_tsk
);
566 __entry
->dst_ngid
= task_numa_group_id(dst_tsk
);
567 __entry
->dst_cpu
= dst_cpu
;
568 __entry
->dst_nid
= cpu_to_node(dst_cpu
);
571 TP_printk("src_pid=%d src_tgid=%d src_ngid=%d src_cpu=%d src_nid=%d dst_pid=%d dst_tgid=%d dst_ngid=%d dst_cpu=%d dst_nid=%d",
572 __entry
->src_pid
, __entry
->src_tgid
, __entry
->src_ngid
,
573 __entry
->src_cpu
, __entry
->src_nid
,
574 __entry
->dst_pid
, __entry
->dst_tgid
, __entry
->dst_ngid
,
575 __entry
->dst_cpu
, __entry
->dst_nid
)
579 * Tracepoint for waking a polling cpu without an IPI.
581 TRACE_EVENT(sched_wake_idle_without_ipi
,
595 TP_printk("cpu=%d", __entry
->cpu
)
599 * Following tracepoints are not exported in tracefs and provide hooking
600 * mechanisms only for testing and debugging purposes.
602 * Postfixed with _tp to make them easily identifiable in the code.
604 DECLARE_TRACE(pelt_cfs_tp
,
605 TP_PROTO(struct cfs_rq
*cfs_rq
),
608 DECLARE_TRACE(pelt_rt_tp
,
609 TP_PROTO(struct rq
*rq
),
612 DECLARE_TRACE(pelt_dl_tp
,
613 TP_PROTO(struct rq
*rq
),
616 DECLARE_TRACE(pelt_irq_tp
,
617 TP_PROTO(struct rq
*rq
),
620 DECLARE_TRACE(pelt_se_tp
,
621 TP_PROTO(struct sched_entity
*se
),
624 DECLARE_TRACE(sched_overutilized_tp
,
625 TP_PROTO(struct root_domain
*rd
, bool overutilized
),
626 TP_ARGS(rd
, overutilized
));
628 #endif /* _TRACE_SCHED_H */
630 /* This part must be outside protection */
631 #include <trace/define_trace.h>