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ftrace: Create ftrace_hash_empty() helper routine
[linux/fpc-iii.git] / tools / perf / builtin-sched.c
blob714fc359eb7a9990d5dcaf7a97d0fc898c0fd2cf
1 #include "builtin.h"
2 #include "perf.h"
3
4 #include "util/util.h"
5 #include "util/cache.h"
6 #include "util/symbol.h"
7 #include "util/thread.h"
8 #include "util/header.h"
9 #include "util/session.h"
10
11 #include "util/parse-options.h"
12 #include "util/trace-event.h"
13
14 #include "util/debug.h"
15
16 #include <sys/prctl.h>
17 #include <sys/resource.h>
18
19 #include <semaphore.h>
20 #include <pthread.h>
21 #include <math.h>
22
23 static char const *input_name = "perf.data";
24
25 static char default_sort_order[] = "avg, max, switch, runtime";
26 static const char *sort_order = default_sort_order;
27
28 static int profile_cpu = -1;
29
30 #define PR_SET_NAME 15 /* Set process name */
31 #define MAX_CPUS 4096
32
33 static u64 run_measurement_overhead;
34 static u64 sleep_measurement_overhead;
35
36 #define COMM_LEN 20
37 #define SYM_LEN 129
38
39 #define MAX_PID 65536
40
41 static unsigned long nr_tasks;
42
43 struct sched_atom;
44
45 struct task_desc {
46 unsigned long nr;
47 unsigned long pid;
48 char comm[COMM_LEN];
49
50 unsigned long nr_events;
51 unsigned long curr_event;
52 struct sched_atom **atoms;
53
54 pthread_t thread;
55 sem_t sleep_sem;
56
57 sem_t ready_for_work;
58 sem_t work_done_sem;
59
60 u64 cpu_usage;
61 };
62
63 enum sched_event_type {
64 SCHED_EVENT_RUN,
65 SCHED_EVENT_SLEEP,
66 SCHED_EVENT_WAKEUP,
67 SCHED_EVENT_MIGRATION,
68 };
69
70 struct sched_atom {
71 enum sched_event_type type;
72 int specific_wait;
73 u64 timestamp;
74 u64 duration;
75 unsigned long nr;
76 sem_t *wait_sem;
77 struct task_desc *wakee;
78 };
79
80 static struct task_desc *pid_to_task[MAX_PID];
81
82 static struct task_desc **tasks;
83
84 static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
85 static u64 start_time;
86
87 static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
88
89 static unsigned long nr_run_events;
90 static unsigned long nr_sleep_events;
91 static unsigned long nr_wakeup_events;
92
93 static unsigned long nr_sleep_corrections;
94 static unsigned long nr_run_events_optimized;
95
96 static unsigned long targetless_wakeups;
97 static unsigned long multitarget_wakeups;
98
99 static u64 cpu_usage;
100 static u64 runavg_cpu_usage;
101 static u64 parent_cpu_usage;
102 static u64 runavg_parent_cpu_usage;
103
104 static unsigned long nr_runs;
105 static u64 sum_runtime;
106 static u64 sum_fluct;
107 static u64 run_avg;
108
109 static unsigned int replay_repeat = 10;
110 static unsigned long nr_timestamps;
111 static unsigned long nr_unordered_timestamps;
112 static unsigned long nr_state_machine_bugs;
113 static unsigned long nr_context_switch_bugs;
114 static unsigned long nr_events;
115 static unsigned long nr_lost_chunks;
116 static unsigned long nr_lost_events;
117
118 #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
119
120 enum thread_state {
121 THREAD_SLEEPING = 0,
122 THREAD_WAIT_CPU,
123 THREAD_SCHED_IN,
124 THREAD_IGNORE
125 };
126
127 struct work_atom {
128 struct list_head list;
129 enum thread_state state;
130 u64 sched_out_time;
131 u64 wake_up_time;
132 u64 sched_in_time;
133 u64 runtime;
134 };
135
136 struct work_atoms {
137 struct list_head work_list;
138 struct thread *thread;
139 struct rb_node node;
140 u64 max_lat;
141 u64 max_lat_at;
142 u64 total_lat;
143 u64 nb_atoms;
144 u64 total_runtime;
145 };
146
147 typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
148
149 static struct rb_root atom_root, sorted_atom_root;
150
151 static u64 all_runtime;
152 static u64 all_count;
153
154
155 static u64 get_nsecs(void)
156 {
157 struct timespec ts;
158
159 clock_gettime(CLOCK_MONOTONIC, &ts);
160
161 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
162 }
163
164 static void burn_nsecs(u64 nsecs)
165 {
166 u64 T0 = get_nsecs(), T1;
167
168 do {
169 T1 = get_nsecs();
170 } while (T1 + run_measurement_overhead < T0 + nsecs);
171 }
172
173 static void sleep_nsecs(u64 nsecs)
174 {
175 struct timespec ts;
176
177 ts.tv_nsec = nsecs % 999999999;
178 ts.tv_sec = nsecs / 999999999;
179
180 nanosleep(&ts, NULL);
181 }
182
183 static void calibrate_run_measurement_overhead(void)
184 {
185 u64 T0, T1, delta, min_delta = 1000000000ULL;
186 int i;
187
188 for (i = 0; i < 10; i++) {
189 T0 = get_nsecs();
190 burn_nsecs(0);
191 T1 = get_nsecs();
192 delta = T1-T0;
193 min_delta = min(min_delta, delta);
194 }
195 run_measurement_overhead = min_delta;
196
197 printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
198 }
199
200 static void calibrate_sleep_measurement_overhead(void)
201 {
202 u64 T0, T1, delta, min_delta = 1000000000ULL;
203 int i;
204
205 for (i = 0; i < 10; i++) {
206 T0 = get_nsecs();
207 sleep_nsecs(10000);
208 T1 = get_nsecs();
209 delta = T1-T0;
210 min_delta = min(min_delta, delta);
211 }
212 min_delta -= 10000;
213 sleep_measurement_overhead = min_delta;
214
215 printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
216 }
217
218 static struct sched_atom *
219 get_new_event(struct task_desc *task, u64 timestamp)
220 {
221 struct sched_atom *event = zalloc(sizeof(*event));
222 unsigned long idx = task->nr_events;
223 size_t size;
224
225 event->timestamp = timestamp;
226 event->nr = idx;
227
228 task->nr_events++;
229 size = sizeof(struct sched_atom *) * task->nr_events;
230 task->atoms = realloc(task->atoms, size);
231 BUG_ON(!task->atoms);
232
233 task->atoms[idx] = event;
234
235 return event;
236 }
237
238 static struct sched_atom *last_event(struct task_desc *task)
239 {
240 if (!task->nr_events)
241 return NULL;
242
243 return task->atoms[task->nr_events - 1];
244 }
245
246 static void
247 add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
248 {
249 struct sched_atom *event, *curr_event = last_event(task);
250
251 /*
252 * optimize an existing RUN event by merging this one
253 * to it:
254 */
255 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
256 nr_run_events_optimized++;
257 curr_event->duration += duration;
258 return;
259 }
260
261 event = get_new_event(task, timestamp);
262
263 event->type = SCHED_EVENT_RUN;
264 event->duration = duration;
265
266 nr_run_events++;
267 }
268
269 static void
270 add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
271 struct task_desc *wakee)
272 {
273 struct sched_atom *event, *wakee_event;
274
275 event = get_new_event(task, timestamp);
276 event->type = SCHED_EVENT_WAKEUP;
277 event->wakee = wakee;
278
279 wakee_event = last_event(wakee);
280 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
281 targetless_wakeups++;
282 return;
283 }
284 if (wakee_event->wait_sem) {
285 multitarget_wakeups++;
286 return;
287 }
288
289 wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
290 sem_init(wakee_event->wait_sem, 0, 0);
291 wakee_event->specific_wait = 1;
292 event->wait_sem = wakee_event->wait_sem;
293
294 nr_wakeup_events++;
295 }
296
297 static void
298 add_sched_event_sleep(struct task_desc *task, u64 timestamp,
299 u64 task_state __used)
300 {
301 struct sched_atom *event = get_new_event(task, timestamp);
302
303 event->type = SCHED_EVENT_SLEEP;
304
305 nr_sleep_events++;
306 }
307
308 static struct task_desc *register_pid(unsigned long pid, const char *comm)
309 {
310 struct task_desc *task;
311
312 BUG_ON(pid >= MAX_PID);
313
314 task = pid_to_task[pid];
315
316 if (task)
317 return task;
318
319 task = zalloc(sizeof(*task));
320 task->pid = pid;
321 task->nr = nr_tasks;
322 strcpy(task->comm, comm);
323 /*
324 * every task starts in sleeping state - this gets ignored
325 * if there's no wakeup pointing to this sleep state:
326 */
327 add_sched_event_sleep(task, 0, 0);
328
329 pid_to_task[pid] = task;
330 nr_tasks++;
331 tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
332 BUG_ON(!tasks);
333 tasks[task->nr] = task;
334
335 if (verbose)
336 printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
337
338 return task;
339 }
340
341
342 static void print_task_traces(void)
343 {
344 struct task_desc *task;
345 unsigned long i;
346
347 for (i = 0; i < nr_tasks; i++) {
348 task = tasks[i];
349 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
350 task->nr, task->comm, task->pid, task->nr_events);
351 }
352 }
353
354 static void add_cross_task_wakeups(void)
355 {
356 struct task_desc *task1, *task2;
357 unsigned long i, j;
358
359 for (i = 0; i < nr_tasks; i++) {
360 task1 = tasks[i];
361 j = i + 1;
362 if (j == nr_tasks)
363 j = 0;
364 task2 = tasks[j];
365 add_sched_event_wakeup(task1, 0, task2);
366 }
367 }
368
369 static void
370 process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
371 {
372 int ret = 0;
373
374 switch (atom->type) {
375 case SCHED_EVENT_RUN:
376 burn_nsecs(atom->duration);
377 break;
378 case SCHED_EVENT_SLEEP:
379 if (atom->wait_sem)
380 ret = sem_wait(atom->wait_sem);
381 BUG_ON(ret);
382 break;
383 case SCHED_EVENT_WAKEUP:
384 if (atom->wait_sem)
385 ret = sem_post(atom->wait_sem);
386 BUG_ON(ret);
387 break;
388 case SCHED_EVENT_MIGRATION:
389 break;
390 default:
391 BUG_ON(1);
392 }
393 }
394
395 static u64 get_cpu_usage_nsec_parent(void)
396 {
397 struct rusage ru;
398 u64 sum;
399 int err;
400
401 err = getrusage(RUSAGE_SELF, &ru);
402 BUG_ON(err);
403
404 sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3;
405 sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3;
406
407 return sum;
408 }
409
410 static int self_open_counters(void)
411 {
412 struct perf_event_attr attr;
413 int fd;
414
415 memset(&attr, 0, sizeof(attr));
416
417 attr.type = PERF_TYPE_SOFTWARE;
418 attr.config = PERF_COUNT_SW_TASK_CLOCK;
419
420 fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
421
422 if (fd < 0)
423 die("Error: sys_perf_event_open() syscall returned"
424 "with %d (%s)\n", fd, strerror(errno));
425 return fd;
426 }
427
428 static u64 get_cpu_usage_nsec_self(int fd)
429 {
430 u64 runtime;
431 int ret;
432
433 ret = read(fd, &runtime, sizeof(runtime));
434 BUG_ON(ret != sizeof(runtime));
435
436 return runtime;
437 }
438
439 static void *thread_func(void *ctx)
440 {
441 struct task_desc *this_task = ctx;
442 u64 cpu_usage_0, cpu_usage_1;
443 unsigned long i, ret;
444 char comm2[22];
445 int fd;
446
447 sprintf(comm2, ":%s", this_task->comm);
448 prctl(PR_SET_NAME, comm2);
449 fd = self_open_counters();
450
451 again:
452 ret = sem_post(&this_task->ready_for_work);
453 BUG_ON(ret);
454 ret = pthread_mutex_lock(&start_work_mutex);
455 BUG_ON(ret);
456 ret = pthread_mutex_unlock(&start_work_mutex);
457 BUG_ON(ret);
458
459 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
460
461 for (i = 0; i < this_task->nr_events; i++) {
462 this_task->curr_event = i;
463 process_sched_event(this_task, this_task->atoms[i]);
464 }
465
466 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
467 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
468 ret = sem_post(&this_task->work_done_sem);
469 BUG_ON(ret);
470
471 ret = pthread_mutex_lock(&work_done_wait_mutex);
472 BUG_ON(ret);
473 ret = pthread_mutex_unlock(&work_done_wait_mutex);
474 BUG_ON(ret);
475
476 goto again;
477 }
478
479 static void create_tasks(void)
480 {
481 struct task_desc *task;
482 pthread_attr_t attr;
483 unsigned long i;
484 int err;
485
486 err = pthread_attr_init(&attr);
487 BUG_ON(err);
488 err = pthread_attr_setstacksize(&attr,
489 (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
490 BUG_ON(err);
491 err = pthread_mutex_lock(&start_work_mutex);
492 BUG_ON(err);
493 err = pthread_mutex_lock(&work_done_wait_mutex);
494 BUG_ON(err);
495 for (i = 0; i < nr_tasks; i++) {
496 task = tasks[i];
497 sem_init(&task->sleep_sem, 0, 0);
498 sem_init(&task->ready_for_work, 0, 0);
499 sem_init(&task->work_done_sem, 0, 0);
500 task->curr_event = 0;
501 err = pthread_create(&task->thread, &attr, thread_func, task);
502 BUG_ON(err);
503 }
504 }
505
506 static void wait_for_tasks(void)
507 {
508 u64 cpu_usage_0, cpu_usage_1;
509 struct task_desc *task;
510 unsigned long i, ret;
511
512 start_time = get_nsecs();
513 cpu_usage = 0;
514 pthread_mutex_unlock(&work_done_wait_mutex);
515
516 for (i = 0; i < nr_tasks; i++) {
517 task = tasks[i];
518 ret = sem_wait(&task->ready_for_work);
519 BUG_ON(ret);
520 sem_init(&task->ready_for_work, 0, 0);
521 }
522 ret = pthread_mutex_lock(&work_done_wait_mutex);
523 BUG_ON(ret);
524
525 cpu_usage_0 = get_cpu_usage_nsec_parent();
526
527 pthread_mutex_unlock(&start_work_mutex);
528
529 for (i = 0; i < nr_tasks; i++) {
530 task = tasks[i];
531 ret = sem_wait(&task->work_done_sem);
532 BUG_ON(ret);
533 sem_init(&task->work_done_sem, 0, 0);
534 cpu_usage += task->cpu_usage;
535 task->cpu_usage = 0;
536 }
537
538 cpu_usage_1 = get_cpu_usage_nsec_parent();
539 if (!runavg_cpu_usage)
540 runavg_cpu_usage = cpu_usage;
541 runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10;
542
543 parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
544 if (!runavg_parent_cpu_usage)
545 runavg_parent_cpu_usage = parent_cpu_usage;
546 runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 +
547 parent_cpu_usage)/10;
548
549 ret = pthread_mutex_lock(&start_work_mutex);
550 BUG_ON(ret);
551
552 for (i = 0; i < nr_tasks; i++) {
553 task = tasks[i];
554 sem_init(&task->sleep_sem, 0, 0);
555 task->curr_event = 0;
556 }
557 }
558
559 static void run_one_test(void)
560 {
561 u64 T0, T1, delta, avg_delta, fluct;
562
563 T0 = get_nsecs();
564 wait_for_tasks();
565 T1 = get_nsecs();
566
567 delta = T1 - T0;
568 sum_runtime += delta;
569 nr_runs++;
570
571 avg_delta = sum_runtime / nr_runs;
572 if (delta < avg_delta)
573 fluct = avg_delta - delta;
574 else
575 fluct = delta - avg_delta;
576 sum_fluct += fluct;
577 if (!run_avg)
578 run_avg = delta;
579 run_avg = (run_avg*9 + delta)/10;
580
581 printf("#%-3ld: %0.3f, ",
582 nr_runs, (double)delta/1000000.0);
583
584 printf("ravg: %0.2f, ",
585 (double)run_avg/1e6);
586
587 printf("cpu: %0.2f / %0.2f",
588 (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
589
590 #if 0
591 /*
592 * rusage statistics done by the parent, these are less
593 * accurate than the sum_exec_runtime based statistics:
594 */
595 printf(" [%0.2f / %0.2f]",
596 (double)parent_cpu_usage/1e6,
597 (double)runavg_parent_cpu_usage/1e6);
598 #endif
599
600 printf("\n");
601
602 if (nr_sleep_corrections)
603 printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
604 nr_sleep_corrections = 0;
605 }
606
607 static void test_calibrations(void)
608 {
609 u64 T0, T1;
610
611 T0 = get_nsecs();
612 burn_nsecs(1e6);
613 T1 = get_nsecs();
614
615 printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
616
617 T0 = get_nsecs();
618 sleep_nsecs(1e6);
619 T1 = get_nsecs();
620
621 printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
622 }
623
624 #define FILL_FIELD(ptr, field, event, data) \
625 ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
626
627 #define FILL_ARRAY(ptr, array, event, data) \
628 do { \
629 void *__array = raw_field_ptr(event, #array, data); \
630 memcpy(ptr.array, __array, sizeof(ptr.array)); \
631 } while(0)
632
633 #define FILL_COMMON_FIELDS(ptr, event, data) \
634 do { \
635 FILL_FIELD(ptr, common_type, event, data); \
636 FILL_FIELD(ptr, common_flags, event, data); \
637 FILL_FIELD(ptr, common_preempt_count, event, data); \
638 FILL_FIELD(ptr, common_pid, event, data); \
639 FILL_FIELD(ptr, common_tgid, event, data); \
640 } while (0)
641
642
643
644 struct trace_switch_event {
645 u32 size;
646
647 u16 common_type;
648 u8 common_flags;
649 u8 common_preempt_count;
650 u32 common_pid;
651 u32 common_tgid;
652
653 char prev_comm[16];
654 u32 prev_pid;
655 u32 prev_prio;
656 u64 prev_state;
657 char next_comm[16];
658 u32 next_pid;
659 u32 next_prio;
660 };
661
662 struct trace_runtime_event {
663 u32 size;
664
665 u16 common_type;
666 u8 common_flags;
667 u8 common_preempt_count;
668 u32 common_pid;
669 u32 common_tgid;
670
671 char comm[16];
672 u32 pid;
673 u64 runtime;
674 u64 vruntime;
675 };
676
677 struct trace_wakeup_event {
678 u32 size;
679
680 u16 common_type;
681 u8 common_flags;
682 u8 common_preempt_count;
683 u32 common_pid;
684 u32 common_tgid;
685
686 char comm[16];
687 u32 pid;
688
689 u32 prio;
690 u32 success;
691 u32 cpu;
692 };
693
694 struct trace_fork_event {
695 u32 size;
696
697 u16 common_type;
698 u8 common_flags;
699 u8 common_preempt_count;
700 u32 common_pid;
701 u32 common_tgid;
702
703 char parent_comm[16];
704 u32 parent_pid;
705 char child_comm[16];
706 u32 child_pid;
707 };
708
709 struct trace_migrate_task_event {
710 u32 size;
711
712 u16 common_type;
713 u8 common_flags;
714 u8 common_preempt_count;
715 u32 common_pid;
716 u32 common_tgid;
717
718 char comm[16];
719 u32 pid;
720
721 u32 prio;
722 u32 cpu;
723 };
724
725 struct trace_sched_handler {
726 void (*switch_event)(struct trace_switch_event *,
727 struct perf_session *,
728 struct event *,
729 int cpu,
730 u64 timestamp,
731 struct thread *thread);
732
733 void (*runtime_event)(struct trace_runtime_event *,
734 struct perf_session *,
735 struct event *,
736 int cpu,
737 u64 timestamp,
738 struct thread *thread);
739
740 void (*wakeup_event)(struct trace_wakeup_event *,
741 struct perf_session *,
742 struct event *,
743 int cpu,
744 u64 timestamp,
745 struct thread *thread);
746
747 void (*fork_event)(struct trace_fork_event *,
748 struct event *,
749 int cpu,
750 u64 timestamp,
751 struct thread *thread);
752
753 void (*migrate_task_event)(struct trace_migrate_task_event *,
754 struct perf_session *session,
755 struct event *,
756 int cpu,
757 u64 timestamp,
758 struct thread *thread);
759 };
760
761
762 static void
763 replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
764 struct perf_session *session __used,
765 struct event *event,
766 int cpu __used,
767 u64 timestamp __used,
768 struct thread *thread __used)
769 {
770 struct task_desc *waker, *wakee;
771
772 if (verbose) {
773 printf("sched_wakeup event %p\n", event);
774
775 printf(" ... pid %d woke up %s/%d\n",
776 wakeup_event->common_pid,
777 wakeup_event->comm,
778 wakeup_event->pid);
779 }
780
781 waker = register_pid(wakeup_event->common_pid, "<unknown>");
782 wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
783
784 add_sched_event_wakeup(waker, timestamp, wakee);
785 }
786
787 static u64 cpu_last_switched[MAX_CPUS];
788
789 static void
790 replay_switch_event(struct trace_switch_event *switch_event,
791 struct perf_session *session __used,
792 struct event *event,
793 int cpu,
794 u64 timestamp,
795 struct thread *thread __used)
796 {
797 struct task_desc *prev, __used *next;
798 u64 timestamp0;
799 s64 delta;
800
801 if (verbose)
802 printf("sched_switch event %p\n", event);
803
804 if (cpu >= MAX_CPUS || cpu < 0)
805 return;
806
807 timestamp0 = cpu_last_switched[cpu];
808 if (timestamp0)
809 delta = timestamp - timestamp0;
810 else
811 delta = 0;
812
813 if (delta < 0)
814 die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
815
816 if (verbose) {
817 printf(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
818 switch_event->prev_comm, switch_event->prev_pid,
819 switch_event->next_comm, switch_event->next_pid,
820 delta);
821 }
822
823 prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
824 next = register_pid(switch_event->next_pid, switch_event->next_comm);
825
826 cpu_last_switched[cpu] = timestamp;
827
828 add_sched_event_run(prev, timestamp, delta);
829 add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
830 }
831
832
833 static void
834 replay_fork_event(struct trace_fork_event *fork_event,
835 struct event *event,
836 int cpu __used,
837 u64 timestamp __used,
838 struct thread *thread __used)
839 {
840 if (verbose) {
841 printf("sched_fork event %p\n", event);
842 printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
843 printf("... child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
844 }
845 register_pid(fork_event->parent_pid, fork_event->parent_comm);
846 register_pid(fork_event->child_pid, fork_event->child_comm);
847 }
848
849 static struct trace_sched_handler replay_ops = {
850 .wakeup_event = replay_wakeup_event,
851 .switch_event = replay_switch_event,
852 .fork_event = replay_fork_event,
853 };
854
855 struct sort_dimension {
856 const char *name;
857 sort_fn_t cmp;
858 struct list_head list;
859 };
860
861 static LIST_HEAD(cmp_pid);
862
863 static int
864 thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
865 {
866 struct sort_dimension *sort;
867 int ret = 0;
868
869 BUG_ON(list_empty(list));
870
871 list_for_each_entry(sort, list, list) {
872 ret = sort->cmp(l, r);
873 if (ret)
874 return ret;
875 }
876
877 return ret;
878 }
879
880 static struct work_atoms *
881 thread_atoms_search(struct rb_root *root, struct thread *thread,
882 struct list_head *sort_list)
883 {
884 struct rb_node *node = root->rb_node;
885 struct work_atoms key = { .thread = thread };
886
887 while (node) {
888 struct work_atoms *atoms;
889 int cmp;
890
891 atoms = container_of(node, struct work_atoms, node);
892
893 cmp = thread_lat_cmp(sort_list, &key, atoms);
894 if (cmp > 0)
895 node = node->rb_left;
896 else if (cmp < 0)
897 node = node->rb_right;
898 else {
899 BUG_ON(thread != atoms->thread);
900 return atoms;
901 }
902 }
903 return NULL;
904 }
905
906 static void
907 __thread_latency_insert(struct rb_root *root, struct work_atoms *data,
908 struct list_head *sort_list)
909 {
910 struct rb_node **new = &(root->rb_node), *parent = NULL;
911
912 while (*new) {
913 struct work_atoms *this;
914 int cmp;
915
916 this = container_of(*new, struct work_atoms, node);
917 parent = *new;
918
919 cmp = thread_lat_cmp(sort_list, data, this);
920
921 if (cmp > 0)
922 new = &((*new)->rb_left);
923 else
924 new = &((*new)->rb_right);
925 }
926
927 rb_link_node(&data->node, parent, new);
928 rb_insert_color(&data->node, root);
929 }
930
931 static void thread_atoms_insert(struct thread *thread)
932 {
933 struct work_atoms *atoms = zalloc(sizeof(*atoms));
934 if (!atoms)
935 die("No memory");
936
937 atoms->thread = thread;
938 INIT_LIST_HEAD(&atoms->work_list);
939 __thread_latency_insert(&atom_root, atoms, &cmp_pid);
940 }
941
942 static void
943 latency_fork_event(struct trace_fork_event *fork_event __used,
944 struct event *event __used,
945 int cpu __used,
946 u64 timestamp __used,
947 struct thread *thread __used)
948 {
949 /* should insert the newcomer */
950 }
951
952 __used
953 static char sched_out_state(struct trace_switch_event *switch_event)
954 {
955 const char *str = TASK_STATE_TO_CHAR_STR;
956
957 return str[switch_event->prev_state];
958 }
959
960 static void
961 add_sched_out_event(struct work_atoms *atoms,
962 char run_state,
963 u64 timestamp)
964 {
965 struct work_atom *atom = zalloc(sizeof(*atom));
966 if (!atom)
967 die("Non memory");
968
969 atom->sched_out_time = timestamp;
970
971 if (run_state == 'R') {
972 atom->state = THREAD_WAIT_CPU;
973 atom->wake_up_time = atom->sched_out_time;
974 }
975
976 list_add_tail(&atom->list, &atoms->work_list);
977 }
978
979 static void
980 add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used)
981 {
982 struct work_atom *atom;
983
984 BUG_ON(list_empty(&atoms->work_list));
985
986 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
987
988 atom->runtime += delta;
989 atoms->total_runtime += delta;
990 }
991
992 static void
993 add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
994 {
995 struct work_atom *atom;
996 u64 delta;
997
998 if (list_empty(&atoms->work_list))
999 return;
1000
1001 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1002
1003 if (atom->state != THREAD_WAIT_CPU)
1004 return;
1005
1006 if (timestamp < atom->wake_up_time) {
1007 atom->state = THREAD_IGNORE;
1008 return;
1009 }
1010
1011 atom->state = THREAD_SCHED_IN;
1012 atom->sched_in_time = timestamp;
1013
1014 delta = atom->sched_in_time - atom->wake_up_time;
1015 atoms->total_lat += delta;
1016 if (delta > atoms->max_lat) {
1017 atoms->max_lat = delta;
1018 atoms->max_lat_at = timestamp;
1019 }
1020 atoms->nb_atoms++;
1021 }
1022
1023 static void
1024 latency_switch_event(struct trace_switch_event *switch_event,
1025 struct perf_session *session,
1026 struct event *event __used,
1027 int cpu,
1028 u64 timestamp,
1029 struct thread *thread __used)
1030 {
1031 struct work_atoms *out_events, *in_events;
1032 struct thread *sched_out, *sched_in;
1033 u64 timestamp0;
1034 s64 delta;
1035
1036 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1037
1038 timestamp0 = cpu_last_switched[cpu];
1039 cpu_last_switched[cpu] = timestamp;
1040 if (timestamp0)
1041 delta = timestamp - timestamp0;
1042 else
1043 delta = 0;
1044
1045 if (delta < 0)
1046 die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1047
1048
1049 sched_out = perf_session__findnew(session, switch_event->prev_pid);
1050 sched_in = perf_session__findnew(session, switch_event->next_pid);
1051
1052 out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1053 if (!out_events) {
1054 thread_atoms_insert(sched_out);
1055 out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1056 if (!out_events)
1057 die("out-event: Internal tree error");
1058 }
1059 add_sched_out_event(out_events, sched_out_state(switch_event), timestamp);
1060
1061 in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1062 if (!in_events) {
1063 thread_atoms_insert(sched_in);
1064 in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1065 if (!in_events)
1066 die("in-event: Internal tree error");
1067 /*
1068 * Take came in we have not heard about yet,
1069 * add in an initial atom in runnable state:
1070 */
1071 add_sched_out_event(in_events, 'R', timestamp);
1072 }
1073 add_sched_in_event(in_events, timestamp);
1074 }
1075
1076 static void
1077 latency_runtime_event(struct trace_runtime_event *runtime_event,
1078 struct perf_session *session,
1079 struct event *event __used,
1080 int cpu,
1081 u64 timestamp,
1082 struct thread *this_thread __used)
1083 {
1084 struct thread *thread = perf_session__findnew(session, runtime_event->pid);
1085 struct work_atoms *atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1086
1087 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1088 if (!atoms) {
1089 thread_atoms_insert(thread);
1090 atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1091 if (!atoms)
1092 die("in-event: Internal tree error");
1093 add_sched_out_event(atoms, 'R', timestamp);
1094 }
1095
1096 add_runtime_event(atoms, runtime_event->runtime, timestamp);
1097 }
1098
1099 static void
1100 latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
1101 struct perf_session *session,
1102 struct event *__event __used,
1103 int cpu __used,
1104 u64 timestamp,
1105 struct thread *thread __used)
1106 {
1107 struct work_atoms *atoms;
1108 struct work_atom *atom;
1109 struct thread *wakee;
1110
1111 /* Note for later, it may be interesting to observe the failing cases */
1112 if (!wakeup_event->success)
1113 return;
1114
1115 wakee = perf_session__findnew(session, wakeup_event->pid);
1116 atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1117 if (!atoms) {
1118 thread_atoms_insert(wakee);
1119 atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1120 if (!atoms)
1121 die("wakeup-event: Internal tree error");
1122 add_sched_out_event(atoms, 'S', timestamp);
1123 }
1124
1125 BUG_ON(list_empty(&atoms->work_list));
1126
1127 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1128
1129 /*
1130 * You WILL be missing events if you've recorded only
1131 * one CPU, or are only looking at only one, so don't
1132 * make useless noise.
1133 */
1134 if (profile_cpu == -1 && atom->state != THREAD_SLEEPING)
1135 nr_state_machine_bugs++;
1136
1137 nr_timestamps++;
1138 if (atom->sched_out_time > timestamp) {
1139 nr_unordered_timestamps++;
1140 return;
1141 }
1142
1143 atom->state = THREAD_WAIT_CPU;
1144 atom->wake_up_time = timestamp;
1145 }
1146
1147 static void
1148 latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
1149 struct perf_session *session,
1150 struct event *__event __used,
1151 int cpu __used,
1152 u64 timestamp,
1153 struct thread *thread __used)
1154 {
1155 struct work_atoms *atoms;
1156 struct work_atom *atom;
1157 struct thread *migrant;
1158
1159 /*
1160 * Only need to worry about migration when profiling one CPU.
1161 */
1162 if (profile_cpu == -1)
1163 return;
1164
1165 migrant = perf_session__findnew(session, migrate_task_event->pid);
1166 atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1167 if (!atoms) {
1168 thread_atoms_insert(migrant);
1169 register_pid(migrant->pid, migrant->comm);
1170 atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1171 if (!atoms)
1172 die("migration-event: Internal tree error");
1173 add_sched_out_event(atoms, 'R', timestamp);
1174 }
1175
1176 BUG_ON(list_empty(&atoms->work_list));
1177
1178 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1179 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1180
1181 nr_timestamps++;
1182
1183 if (atom->sched_out_time > timestamp)
1184 nr_unordered_timestamps++;
1185 }
1186
1187 static struct trace_sched_handler lat_ops = {
1188 .wakeup_event = latency_wakeup_event,
1189 .switch_event = latency_switch_event,
1190 .runtime_event = latency_runtime_event,
1191 .fork_event = latency_fork_event,
1192 .migrate_task_event = latency_migrate_task_event,
1193 };
1194
1195 static void output_lat_thread(struct work_atoms *work_list)
1196 {
1197 int i;
1198 int ret;
1199 u64 avg;
1200
1201 if (!work_list->nb_atoms)
1202 return;
1203 /*
1204 * Ignore idle threads:
1205 */
1206 if (!strcmp(work_list->thread->comm, "swapper"))
1207 return;
1208
1209 all_runtime += work_list->total_runtime;
1210 all_count += work_list->nb_atoms;
1211
1212 ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->pid);
1213
1214 for (i = 0; i < 24 - ret; i++)
1215 printf(" ");
1216
1217 avg = work_list->total_lat / work_list->nb_atoms;
1218
1219 printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %9.6f s\n",
1220 (double)work_list->total_runtime / 1e6,
1221 work_list->nb_atoms, (double)avg / 1e6,
1222 (double)work_list->max_lat / 1e6,
1223 (double)work_list->max_lat_at / 1e9);
1224 }
1225
1226 static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
1227 {
1228 if (l->thread->pid < r->thread->pid)
1229 return -1;
1230 if (l->thread->pid > r->thread->pid)
1231 return 1;
1232
1233 return 0;
1234 }
1235
1236 static struct sort_dimension pid_sort_dimension = {
1237 .name = "pid",
1238 .cmp = pid_cmp,
1239 };
1240
1241 static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
1242 {
1243 u64 avgl, avgr;
1244
1245 if (!l->nb_atoms)
1246 return -1;
1247
1248 if (!r->nb_atoms)
1249 return 1;
1250
1251 avgl = l->total_lat / l->nb_atoms;
1252 avgr = r->total_lat / r->nb_atoms;
1253
1254 if (avgl < avgr)
1255 return -1;
1256 if (avgl > avgr)
1257 return 1;
1258
1259 return 0;
1260 }
1261
1262 static struct sort_dimension avg_sort_dimension = {
1263 .name = "avg",
1264 .cmp = avg_cmp,
1265 };
1266
1267 static int max_cmp(struct work_atoms *l, struct work_atoms *r)
1268 {
1269 if (l->max_lat < r->max_lat)
1270 return -1;
1271 if (l->max_lat > r->max_lat)
1272 return 1;
1273
1274 return 0;
1275 }
1276
1277 static struct sort_dimension max_sort_dimension = {
1278 .name = "max",
1279 .cmp = max_cmp,
1280 };
1281
1282 static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
1283 {
1284 if (l->nb_atoms < r->nb_atoms)
1285 return -1;
1286 if (l->nb_atoms > r->nb_atoms)
1287 return 1;
1288
1289 return 0;
1290 }
1291
1292 static struct sort_dimension switch_sort_dimension = {
1293 .name = "switch",
1294 .cmp = switch_cmp,
1295 };
1296
1297 static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
1298 {
1299 if (l->total_runtime < r->total_runtime)
1300 return -1;
1301 if (l->total_runtime > r->total_runtime)
1302 return 1;
1303
1304 return 0;
1305 }
1306
1307 static struct sort_dimension runtime_sort_dimension = {
1308 .name = "runtime",
1309 .cmp = runtime_cmp,
1310 };
1311
1312 static struct sort_dimension *available_sorts[] = {
1313 &pid_sort_dimension,
1314 &avg_sort_dimension,
1315 &max_sort_dimension,
1316 &switch_sort_dimension,
1317 &runtime_sort_dimension,
1318 };
1319
1320 #define NB_AVAILABLE_SORTS (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
1321
1322 static LIST_HEAD(sort_list);
1323
1324 static int sort_dimension__add(const char *tok, struct list_head *list)
1325 {
1326 int i;
1327
1328 for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
1329 if (!strcmp(available_sorts[i]->name, tok)) {
1330 list_add_tail(&available_sorts[i]->list, list);
1331
1332 return 0;
1333 }
1334 }
1335
1336 return -1;
1337 }
1338
1339 static void setup_sorting(void);
1340
1341 static void sort_lat(void)
1342 {
1343 struct rb_node *node;
1344
1345 for (;;) {
1346 struct work_atoms *data;
1347 node = rb_first(&atom_root);
1348 if (!node)
1349 break;
1350
1351 rb_erase(node, &atom_root);
1352 data = rb_entry(node, struct work_atoms, node);
1353 __thread_latency_insert(&sorted_atom_root, data, &sort_list);
1354 }
1355 }
1356
1357 static struct trace_sched_handler *trace_handler;
1358
1359 static void
1360 process_sched_wakeup_event(void *data, struct perf_session *session,
1361 struct event *event,
1362 int cpu __used,
1363 u64 timestamp __used,
1364 struct thread *thread __used)
1365 {
1366 struct trace_wakeup_event wakeup_event;
1367
1368 FILL_COMMON_FIELDS(wakeup_event, event, data);
1369
1370 FILL_ARRAY(wakeup_event, comm, event, data);
1371 FILL_FIELD(wakeup_event, pid, event, data);
1372 FILL_FIELD(wakeup_event, prio, event, data);
1373 FILL_FIELD(wakeup_event, success, event, data);
1374 FILL_FIELD(wakeup_event, cpu, event, data);
1375
1376 if (trace_handler->wakeup_event)
1377 trace_handler->wakeup_event(&wakeup_event, session, event,
1378 cpu, timestamp, thread);
1379 }
1380
1381 /*
1382 * Track the current task - that way we can know whether there's any
1383 * weird events, such as a task being switched away that is not current.
1384 */
1385 static int max_cpu;
1386
1387 static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
1388
1389 static struct thread *curr_thread[MAX_CPUS];
1390
1391 static char next_shortname1 = 'A';
1392 static char next_shortname2 = '0';
1393
1394 static void
1395 map_switch_event(struct trace_switch_event *switch_event,
1396 struct perf_session *session,
1397 struct event *event __used,
1398 int this_cpu,
1399 u64 timestamp,
1400 struct thread *thread __used)
1401 {
1402 struct thread *sched_out __used, *sched_in;
1403 int new_shortname;
1404 u64 timestamp0;
1405 s64 delta;
1406 int cpu;
1407
1408 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1409
1410 if (this_cpu > max_cpu)
1411 max_cpu = this_cpu;
1412
1413 timestamp0 = cpu_last_switched[this_cpu];
1414 cpu_last_switched[this_cpu] = timestamp;
1415 if (timestamp0)
1416 delta = timestamp - timestamp0;
1417 else
1418 delta = 0;
1419
1420 if (delta < 0)
1421 die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1422
1423
1424 sched_out = perf_session__findnew(session, switch_event->prev_pid);
1425 sched_in = perf_session__findnew(session, switch_event->next_pid);
1426
1427 curr_thread[this_cpu] = sched_in;
1428
1429 printf(" ");
1430
1431 new_shortname = 0;
1432 if (!sched_in->shortname[0]) {
1433 sched_in->shortname[0] = next_shortname1;
1434 sched_in->shortname[1] = next_shortname2;
1435
1436 if (next_shortname1 < 'Z') {
1437 next_shortname1++;
1438 } else {
1439 next_shortname1='A';
1440 if (next_shortname2 < '9') {
1441 next_shortname2++;
1442 } else {
1443 next_shortname2='0';
1444 }
1445 }
1446 new_shortname = 1;
1447 }
1448
1449 for (cpu = 0; cpu <= max_cpu; cpu++) {
1450 if (cpu != this_cpu)
1451 printf(" ");
1452 else
1453 printf("*");
1454
1455 if (curr_thread[cpu]) {
1456 if (curr_thread[cpu]->pid)
1457 printf("%2s ", curr_thread[cpu]->shortname);
1458 else
1459 printf(". ");
1460 } else
1461 printf(" ");
1462 }
1463
1464 printf(" %12.6f secs ", (double)timestamp/1e9);
1465 if (new_shortname) {
1466 printf("%s => %s:%d\n",
1467 sched_in->shortname, sched_in->comm, sched_in->pid);
1468 } else {
1469 printf("\n");
1470 }
1471 }
1472
1473
1474 static void
1475 process_sched_switch_event(void *data, struct perf_session *session,
1476 struct event *event,
1477 int this_cpu,
1478 u64 timestamp __used,
1479 struct thread *thread __used)
1480 {
1481 struct trace_switch_event switch_event;
1482
1483 FILL_COMMON_FIELDS(switch_event, event, data);
1484
1485 FILL_ARRAY(switch_event, prev_comm, event, data);
1486 FILL_FIELD(switch_event, prev_pid, event, data);
1487 FILL_FIELD(switch_event, prev_prio, event, data);
1488 FILL_FIELD(switch_event, prev_state, event, data);
1489 FILL_ARRAY(switch_event, next_comm, event, data);
1490 FILL_FIELD(switch_event, next_pid, event, data);
1491 FILL_FIELD(switch_event, next_prio, event, data);
1492
1493 if (curr_pid[this_cpu] != (u32)-1) {
1494 /*
1495 * Are we trying to switch away a PID that is
1496 * not current?
1497 */
1498 if (curr_pid[this_cpu] != switch_event.prev_pid)
1499 nr_context_switch_bugs++;
1500 }
1501 if (trace_handler->switch_event)
1502 trace_handler->switch_event(&switch_event, session, event,
1503 this_cpu, timestamp, thread);
1504
1505 curr_pid[this_cpu] = switch_event.next_pid;
1506 }
1507
1508 static void
1509 process_sched_runtime_event(void *data, struct perf_session *session,
1510 struct event *event,
1511 int cpu __used,
1512 u64 timestamp __used,
1513 struct thread *thread __used)
1514 {
1515 struct trace_runtime_event runtime_event;
1516
1517 FILL_ARRAY(runtime_event, comm, event, data);
1518 FILL_FIELD(runtime_event, pid, event, data);
1519 FILL_FIELD(runtime_event, runtime, event, data);
1520 FILL_FIELD(runtime_event, vruntime, event, data);
1521
1522 if (trace_handler->runtime_event)
1523 trace_handler->runtime_event(&runtime_event, session, event, cpu, timestamp, thread);
1524 }
1525
1526 static void
1527 process_sched_fork_event(void *data,
1528 struct event *event,
1529 int cpu __used,
1530 u64 timestamp __used,
1531 struct thread *thread __used)
1532 {
1533 struct trace_fork_event fork_event;
1534
1535 FILL_COMMON_FIELDS(fork_event, event, data);
1536
1537 FILL_ARRAY(fork_event, parent_comm, event, data);
1538 FILL_FIELD(fork_event, parent_pid, event, data);
1539 FILL_ARRAY(fork_event, child_comm, event, data);
1540 FILL_FIELD(fork_event, child_pid, event, data);
1541
1542 if (trace_handler->fork_event)
1543 trace_handler->fork_event(&fork_event, event,
1544 cpu, timestamp, thread);
1545 }
1546
1547 static void
1548 process_sched_exit_event(struct event *event,
1549 int cpu __used,
1550 u64 timestamp __used,
1551 struct thread *thread __used)
1552 {
1553 if (verbose)
1554 printf("sched_exit event %p\n", event);
1555 }
1556
1557 static void
1558 process_sched_migrate_task_event(void *data, struct perf_session *session,
1559 struct event *event,
1560 int cpu __used,
1561 u64 timestamp __used,
1562 struct thread *thread __used)
1563 {
1564 struct trace_migrate_task_event migrate_task_event;
1565
1566 FILL_COMMON_FIELDS(migrate_task_event, event, data);
1567
1568 FILL_ARRAY(migrate_task_event, comm, event, data);
1569 FILL_FIELD(migrate_task_event, pid, event, data);
1570 FILL_FIELD(migrate_task_event, prio, event, data);
1571 FILL_FIELD(migrate_task_event, cpu, event, data);
1572
1573 if (trace_handler->migrate_task_event)
1574 trace_handler->migrate_task_event(&migrate_task_event, session,
1575 event, cpu, timestamp, thread);
1576 }
1577
1578 static void process_raw_event(union perf_event *raw_event __used,
1579 struct perf_session *session, void *data, int cpu,
1580 u64 timestamp, struct thread *thread)
1581 {
1582 struct event *event;
1583 int type;
1584
1585
1586 type = trace_parse_common_type(data);
1587 event = trace_find_event(type);
1588
1589 if (!strcmp(event->name, "sched_switch"))
1590 process_sched_switch_event(data, session, event, cpu, timestamp, thread);
1591 if (!strcmp(event->name, "sched_stat_runtime"))
1592 process_sched_runtime_event(data, session, event, cpu, timestamp, thread);
1593 if (!strcmp(event->name, "sched_wakeup"))
1594 process_sched_wakeup_event(data, session, event, cpu, timestamp, thread);
1595 if (!strcmp(event->name, "sched_wakeup_new"))
1596 process_sched_wakeup_event(data, session, event, cpu, timestamp, thread);
1597 if (!strcmp(event->name, "sched_process_fork"))
1598 process_sched_fork_event(data, event, cpu, timestamp, thread);
1599 if (!strcmp(event->name, "sched_process_exit"))
1600 process_sched_exit_event(event, cpu, timestamp, thread);
1601 if (!strcmp(event->name, "sched_migrate_task"))
1602 process_sched_migrate_task_event(data, session, event, cpu, timestamp, thread);
1603 }
1604
1605 static int process_sample_event(union perf_event *event,
1606 struct perf_sample *sample,
1607 struct perf_evsel *evsel __used,
1608 struct perf_session *session)
1609 {
1610 struct thread *thread;
1611
1612 if (!(session->sample_type & PERF_SAMPLE_RAW))
1613 return 0;
1614
1615 thread = perf_session__findnew(session, sample->pid);
1616 if (thread == NULL) {
1617 pr_debug("problem processing %d event, skipping it.\n",
1618 event->header.type);
1619 return -1;
1620 }
1621
1622 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
1623
1624 if (profile_cpu != -1 && profile_cpu != (int)sample->cpu)
1625 return 0;
1626
1627 process_raw_event(event, session, sample->raw_data, sample->cpu,
1628 sample->time, thread);
1629
1630 return 0;
1631 }
1632
1633 static struct perf_event_ops event_ops = {
1634 .sample = process_sample_event,
1635 .comm = perf_event__process_comm,
1636 .lost = perf_event__process_lost,
1637 .fork = perf_event__process_task,
1638 .ordered_samples = true,
1639 };
1640
1641 static void read_events(bool destroy, struct perf_session **psession)
1642 {
1643 int err = -EINVAL;
1644 struct perf_session *session = perf_session__new(input_name, O_RDONLY,
1645 0, false, &event_ops);
1646 if (session == NULL)
1647 die("No Memory");
1648
1649 if (perf_session__has_traces(session, "record -R")) {
1650 err = perf_session__process_events(session, &event_ops);
1651 if (err)
1652 die("Failed to process events, error %d", err);
1653
1654 nr_events = session->hists.stats.nr_events[0];
1655 nr_lost_events = session->hists.stats.total_lost;
1656 nr_lost_chunks = session->hists.stats.nr_events[PERF_RECORD_LOST];
1657 }
1658
1659 if (destroy)
1660 perf_session__delete(session);
1661
1662 if (psession)
1663 *psession = session;
1664 }
1665
1666 static void print_bad_events(void)
1667 {
1668 if (nr_unordered_timestamps && nr_timestamps) {
1669 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
1670 (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
1671 nr_unordered_timestamps, nr_timestamps);
1672 }
1673 if (nr_lost_events && nr_events) {
1674 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
1675 (double)nr_lost_events/(double)nr_events*100.0,
1676 nr_lost_events, nr_events, nr_lost_chunks);
1677 }
1678 if (nr_state_machine_bugs && nr_timestamps) {
1679 printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
1680 (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
1681 nr_state_machine_bugs, nr_timestamps);
1682 if (nr_lost_events)
1683 printf(" (due to lost events?)");
1684 printf("\n");
1685 }
1686 if (nr_context_switch_bugs && nr_timestamps) {
1687 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
1688 (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
1689 nr_context_switch_bugs, nr_timestamps);
1690 if (nr_lost_events)
1691 printf(" (due to lost events?)");
1692 printf("\n");
1693 }
1694 }
1695
1696 static void __cmd_lat(void)
1697 {
1698 struct rb_node *next;
1699 struct perf_session *session;
1700
1701 setup_pager();
1702 read_events(false, &session);
1703 sort_lat();
1704
1705 printf("\n ---------------------------------------------------------------------------------------------------------------\n");
1706 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
1707 printf(" ---------------------------------------------------------------------------------------------------------------\n");
1708
1709 next = rb_first(&sorted_atom_root);
1710
1711 while (next) {
1712 struct work_atoms *work_list;
1713
1714 work_list = rb_entry(next, struct work_atoms, node);
1715 output_lat_thread(work_list);
1716 next = rb_next(next);
1717 }
1718
1719 printf(" -----------------------------------------------------------------------------------------\n");
1720 printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n",
1721 (double)all_runtime/1e6, all_count);
1722
1723 printf(" ---------------------------------------------------\n");
1724
1725 print_bad_events();
1726 printf("\n");
1727
1728 perf_session__delete(session);
1729 }
1730
1731 static struct trace_sched_handler map_ops = {
1732 .wakeup_event = NULL,
1733 .switch_event = map_switch_event,
1734 .runtime_event = NULL,
1735 .fork_event = NULL,
1736 };
1737
1738 static void __cmd_map(void)
1739 {
1740 max_cpu = sysconf(_SC_NPROCESSORS_CONF);
1741
1742 setup_pager();
1743 read_events(true, NULL);
1744 print_bad_events();
1745 }
1746
1747 static void __cmd_replay(void)
1748 {
1749 unsigned long i;
1750
1751 calibrate_run_measurement_overhead();
1752 calibrate_sleep_measurement_overhead();
1753
1754 test_calibrations();
1755
1756 read_events(true, NULL);
1757
1758 printf("nr_run_events: %ld\n", nr_run_events);
1759 printf("nr_sleep_events: %ld\n", nr_sleep_events);
1760 printf("nr_wakeup_events: %ld\n", nr_wakeup_events);
1761
1762 if (targetless_wakeups)
1763 printf("target-less wakeups: %ld\n", targetless_wakeups);
1764 if (multitarget_wakeups)
1765 printf("multi-target wakeups: %ld\n", multitarget_wakeups);
1766 if (nr_run_events_optimized)
1767 printf("run atoms optimized: %ld\n",
1768 nr_run_events_optimized);
1769
1770 print_task_traces();
1771 add_cross_task_wakeups();
1772
1773 create_tasks();
1774 printf("------------------------------------------------------------\n");
1775 for (i = 0; i < replay_repeat; i++)
1776 run_one_test();
1777 }
1778
1779
1780 static const char * const sched_usage[] = {
1781 "perf sched [<options>] {record|latency|map|replay|script}",
1782 NULL
1783 };
1784
1785 static const struct option sched_options[] = {
1786 OPT_STRING('i', "input", &input_name, "file",
1787 "input file name"),
1788 OPT_INCR('v', "verbose", &verbose,
1789 "be more verbose (show symbol address, etc)"),
1790 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1791 "dump raw trace in ASCII"),
1792 OPT_END()
1793 };
1794
1795 static const char * const latency_usage[] = {
1796 "perf sched latency [<options>]",
1797 NULL
1798 };
1799
1800 static const struct option latency_options[] = {
1801 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1802 "sort by key(s): runtime, switch, avg, max"),
1803 OPT_INCR('v', "verbose", &verbose,
1804 "be more verbose (show symbol address, etc)"),
1805 OPT_INTEGER('C', "CPU", &profile_cpu,
1806 "CPU to profile on"),
1807 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1808 "dump raw trace in ASCII"),
1809 OPT_END()
1810 };
1811
1812 static const char * const replay_usage[] = {
1813 "perf sched replay [<options>]",
1814 NULL
1815 };
1816
1817 static const struct option replay_options[] = {
1818 OPT_UINTEGER('r', "repeat", &replay_repeat,
1819 "repeat the workload replay N times (-1: infinite)"),
1820 OPT_INCR('v', "verbose", &verbose,
1821 "be more verbose (show symbol address, etc)"),
1822 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1823 "dump raw trace in ASCII"),
1824 OPT_END()
1825 };
1826
1827 static void setup_sorting(void)
1828 {
1829 char *tmp, *tok, *str = strdup(sort_order);
1830
1831 for (tok = strtok_r(str, ", ", &tmp);
1832 tok; tok = strtok_r(NULL, ", ", &tmp)) {
1833 if (sort_dimension__add(tok, &sort_list) < 0) {
1834 error("Unknown --sort key: `%s'", tok);
1835 usage_with_options(latency_usage, latency_options);
1836 }
1837 }
1838
1839 free(str);
1840
1841 sort_dimension__add("pid", &cmp_pid);
1842 }
1843
1844 static const char *record_args[] = {
1845 "record",
1846 "-a",
1847 "-R",
1848 "-f",
1849 "-m", "1024",
1850 "-c", "1",
1851 "-e", "sched:sched_switch",
1852 "-e", "sched:sched_stat_wait",
1853 "-e", "sched:sched_stat_sleep",
1854 "-e", "sched:sched_stat_iowait",
1855 "-e", "sched:sched_stat_runtime",
1856 "-e", "sched:sched_process_exit",
1857 "-e", "sched:sched_process_fork",
1858 "-e", "sched:sched_wakeup",
1859 "-e", "sched:sched_migrate_task",
1860 };
1861
1862 static int __cmd_record(int argc, const char **argv)
1863 {
1864 unsigned int rec_argc, i, j;
1865 const char **rec_argv;
1866
1867 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1868 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1869
1870 if (rec_argv == NULL)
1871 return -ENOMEM;
1872
1873 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1874 rec_argv[i] = strdup(record_args[i]);
1875
1876 for (j = 1; j < (unsigned int)argc; j++, i++)
1877 rec_argv[i] = argv[j];
1878
1879 BUG_ON(i != rec_argc);
1880
1881 return cmd_record(i, rec_argv, NULL);
1882 }
1883
1884 int cmd_sched(int argc, const char **argv, const char *prefix __used)
1885 {
1886 argc = parse_options(argc, argv, sched_options, sched_usage,
1887 PARSE_OPT_STOP_AT_NON_OPTION);
1888 if (!argc)
1889 usage_with_options(sched_usage, sched_options);
1890
1891 /*
1892 * Aliased to 'perf script' for now:
1893 */
1894 if (!strcmp(argv[0], "script"))
1895 return cmd_script(argc, argv, prefix);
1896
1897 symbol__init();
1898 if (!strncmp(argv[0], "rec", 3)) {
1899 return __cmd_record(argc, argv);
1900 } else if (!strncmp(argv[0], "lat", 3)) {
1901 trace_handler = &lat_ops;
1902 if (argc > 1) {
1903 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
1904 if (argc)
1905 usage_with_options(latency_usage, latency_options);
1906 }
1907 setup_sorting();
1908 __cmd_lat();
1909 } else if (!strcmp(argv[0], "map")) {
1910 trace_handler = &map_ops;
1911 setup_sorting();
1912 __cmd_map();
1913 } else if (!strncmp(argv[0], "rep", 3)) {
1914 trace_handler = &replay_ops;
1915 if (argc) {
1916 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
1917 if (argc)
1918 usage_with_options(replay_usage, replay_options);
1919 }
1920 __cmd_replay();
1921 } else {
1922 usage_with_options(sched_usage, sched_options);
1923 }
1924
1925 return 0;
1926 }
Linux with added FPC-III support