?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
perf session: Ditch register_perf_file_handler
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / tools / perf / builtin-sched.c
blobb5b44723626185c966c77a1bda54193ba0a170bf
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
18 #include <semaphore.h>
19 #include <pthread.h>
20 #include <math.h>
21
22 static char const *input_name = "perf.data";
23
24 static u64 sample_type;
25
26 static char default_sort_order[] = "avg, max, switch, runtime";
27 static char *sort_order = default_sort_order;
28
29 static int profile_cpu = -1;
30
31 #define PR_SET_NAME 15 /* Set process name */
32 #define MAX_CPUS 4096
33
34 static u64 run_measurement_overhead;
35 static u64 sleep_measurement_overhead;
36
37 #define COMM_LEN 20
38 #define SYM_LEN 129
39
40 #define MAX_PID 65536
41
42 static unsigned long nr_tasks;
43
44 struct sched_atom;
45
46 struct task_desc {
47 unsigned long nr;
48 unsigned long pid;
49 char comm[COMM_LEN];
50
51 unsigned long nr_events;
52 unsigned long curr_event;
53 struct sched_atom **atoms;
54
55 pthread_t thread;
56 sem_t sleep_sem;
57
58 sem_t ready_for_work;
59 sem_t work_done_sem;
60
61 u64 cpu_usage;
62 };
63
64 enum sched_event_type {
65 SCHED_EVENT_RUN,
66 SCHED_EVENT_SLEEP,
67 SCHED_EVENT_WAKEUP,
68 SCHED_EVENT_MIGRATION,
69 };
70
71 struct sched_atom {
72 enum sched_event_type type;
73 u64 timestamp;
74 u64 duration;
75 unsigned long nr;
76 int specific_wait;
77 sem_t *wait_sem;
78 struct task_desc *wakee;
79 };
80
81 static struct task_desc *pid_to_task[MAX_PID];
82
83 static struct task_desc **tasks;
84
85 static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
86 static u64 start_time;
87
88 static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
89
90 static unsigned long nr_run_events;
91 static unsigned long nr_sleep_events;
92 static unsigned long nr_wakeup_events;
93
94 static unsigned long nr_sleep_corrections;
95 static unsigned long nr_run_events_optimized;
96
97 static unsigned long targetless_wakeups;
98 static unsigned long multitarget_wakeups;
99
100 static u64 cpu_usage;
101 static u64 runavg_cpu_usage;
102 static u64 parent_cpu_usage;
103 static u64 runavg_parent_cpu_usage;
104
105 static unsigned long nr_runs;
106 static u64 sum_runtime;
107 static u64 sum_fluct;
108 static u64 run_avg;
109
110 static unsigned long replay_repeat = 10;
111 static unsigned long nr_timestamps;
112 static unsigned long nr_unordered_timestamps;
113 static unsigned long nr_state_machine_bugs;
114 static unsigned long nr_context_switch_bugs;
115 static unsigned long nr_events;
116 static unsigned long nr_lost_chunks;
117 static unsigned long nr_lost_events;
118
119 #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
120
121 enum thread_state {
122 THREAD_SLEEPING = 0,
123 THREAD_WAIT_CPU,
124 THREAD_SCHED_IN,
125 THREAD_IGNORE
126 };
127
128 struct work_atom {
129 struct list_head list;
130 enum thread_state state;
131 u64 sched_out_time;
132 u64 wake_up_time;
133 u64 sched_in_time;
134 u64 runtime;
135 };
136
137 struct work_atoms {
138 struct list_head work_list;
139 struct thread *thread;
140 struct rb_node node;
141 u64 max_lat;
142 u64 max_lat_at;
143 u64 total_lat;
144 u64 nb_atoms;
145 u64 total_runtime;
146 };
147
148 typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
149
150 static struct rb_root atom_root, sorted_atom_root;
151
152 static u64 all_runtime;
153 static u64 all_count;
154
155
156 static u64 get_nsecs(void)
157 {
158 struct timespec ts;
159
160 clock_gettime(CLOCK_MONOTONIC, &ts);
161
162 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
163 }
164
165 static void burn_nsecs(u64 nsecs)
166 {
167 u64 T0 = get_nsecs(), T1;
168
169 do {
170 T1 = get_nsecs();
171 } while (T1 + run_measurement_overhead < T0 + nsecs);
172 }
173
174 static void sleep_nsecs(u64 nsecs)
175 {
176 struct timespec ts;
177
178 ts.tv_nsec = nsecs % 999999999;
179 ts.tv_sec = nsecs / 999999999;
180
181 nanosleep(&ts, NULL);
182 }
183
184 static void calibrate_run_measurement_overhead(void)
185 {
186 u64 T0, T1, delta, min_delta = 1000000000ULL;
187 int i;
188
189 for (i = 0; i < 10; i++) {
190 T0 = get_nsecs();
191 burn_nsecs(0);
192 T1 = get_nsecs();
193 delta = T1-T0;
194 min_delta = min(min_delta, delta);
195 }
196 run_measurement_overhead = min_delta;
197
198 printf("run measurement overhead: %Ld nsecs\n", min_delta);
199 }
200
201 static void calibrate_sleep_measurement_overhead(void)
202 {
203 u64 T0, T1, delta, min_delta = 1000000000ULL;
204 int i;
205
206 for (i = 0; i < 10; i++) {
207 T0 = get_nsecs();
208 sleep_nsecs(10000);
209 T1 = get_nsecs();
210 delta = T1-T0;
211 min_delta = min(min_delta, delta);
212 }
213 min_delta -= 10000;
214 sleep_measurement_overhead = min_delta;
215
216 printf("sleep measurement overhead: %Ld nsecs\n", min_delta);
217 }
218
219 static struct sched_atom *
220 get_new_event(struct task_desc *task, u64 timestamp)
221 {
222 struct sched_atom *event = zalloc(sizeof(*event));
223 unsigned long idx = task->nr_events;
224 size_t size;
225
226 event->timestamp = timestamp;
227 event->nr = idx;
228
229 task->nr_events++;
230 size = sizeof(struct sched_atom *) * task->nr_events;
231 task->atoms = realloc(task->atoms, size);
232 BUG_ON(!task->atoms);
233
234 task->atoms[idx] = event;
235
236 return event;
237 }
238
239 static struct sched_atom *last_event(struct task_desc *task)
240 {
241 if (!task->nr_events)
242 return NULL;
243
244 return task->atoms[task->nr_events - 1];
245 }
246
247 static void
248 add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
249 {
250 struct sched_atom *event, *curr_event = last_event(task);
251
252 /*
253 * optimize an existing RUN event by merging this one
254 * to it:
255 */
256 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
257 nr_run_events_optimized++;
258 curr_event->duration += duration;
259 return;
260 }
261
262 event = get_new_event(task, timestamp);
263
264 event->type = SCHED_EVENT_RUN;
265 event->duration = duration;
266
267 nr_run_events++;
268 }
269
270 static void
271 add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
272 struct task_desc *wakee)
273 {
274 struct sched_atom *event, *wakee_event;
275
276 event = get_new_event(task, timestamp);
277 event->type = SCHED_EVENT_WAKEUP;
278 event->wakee = wakee;
279
280 wakee_event = last_event(wakee);
281 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
282 targetless_wakeups++;
283 return;
284 }
285 if (wakee_event->wait_sem) {
286 multitarget_wakeups++;
287 return;
288 }
289
290 wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
291 sem_init(wakee_event->wait_sem, 0, 0);
292 wakee_event->specific_wait = 1;
293 event->wait_sem = wakee_event->wait_sem;
294
295 nr_wakeup_events++;
296 }
297
298 static void
299 add_sched_event_sleep(struct task_desc *task, u64 timestamp,
300 u64 task_state __used)
301 {
302 struct sched_atom *event = get_new_event(task, timestamp);
303
304 event->type = SCHED_EVENT_SLEEP;
305
306 nr_sleep_events++;
307 }
308
309 static struct task_desc *register_pid(unsigned long pid, const char *comm)
310 {
311 struct task_desc *task;
312
313 BUG_ON(pid >= MAX_PID);
314
315 task = pid_to_task[pid];
316
317 if (task)
318 return task;
319
320 task = zalloc(sizeof(*task));
321 task->pid = pid;
322 task->nr = nr_tasks;
323 strcpy(task->comm, comm);
324 /*
325 * every task starts in sleeping state - this gets ignored
326 * if there's no wakeup pointing to this sleep state:
327 */
328 add_sched_event_sleep(task, 0, 0);
329
330 pid_to_task[pid] = task;
331 nr_tasks++;
332 tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
333 BUG_ON(!tasks);
334 tasks[task->nr] = task;
335
336 if (verbose)
337 printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
338
339 return task;
340 }
341
342
343 static void print_task_traces(void)
344 {
345 struct task_desc *task;
346 unsigned long i;
347
348 for (i = 0; i < nr_tasks; i++) {
349 task = tasks[i];
350 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
351 task->nr, task->comm, task->pid, task->nr_events);
352 }
353 }
354
355 static void add_cross_task_wakeups(void)
356 {
357 struct task_desc *task1, *task2;
358 unsigned long i, j;
359
360 for (i = 0; i < nr_tasks; i++) {
361 task1 = tasks[i];
362 j = i + 1;
363 if (j == nr_tasks)
364 j = 0;
365 task2 = tasks[j];
366 add_sched_event_wakeup(task1, 0, task2);
367 }
368 }
369
370 static void
371 process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
372 {
373 int ret = 0;
374 u64 now;
375 long long delta;
376
377 now = get_nsecs();
378 delta = start_time + atom->timestamp - now;
379
380 switch (atom->type) {
381 case SCHED_EVENT_RUN:
382 burn_nsecs(atom->duration);
383 break;
384 case SCHED_EVENT_SLEEP:
385 if (atom->wait_sem)
386 ret = sem_wait(atom->wait_sem);
387 BUG_ON(ret);
388 break;
389 case SCHED_EVENT_WAKEUP:
390 if (atom->wait_sem)
391 ret = sem_post(atom->wait_sem);
392 BUG_ON(ret);
393 break;
394 case SCHED_EVENT_MIGRATION:
395 break;
396 default:
397 BUG_ON(1);
398 }
399 }
400
401 static u64 get_cpu_usage_nsec_parent(void)
402 {
403 struct rusage ru;
404 u64 sum;
405 int err;
406
407 err = getrusage(RUSAGE_SELF, &ru);
408 BUG_ON(err);
409
410 sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3;
411 sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3;
412
413 return sum;
414 }
415
416 static int self_open_counters(void)
417 {
418 struct perf_event_attr attr;
419 int fd;
420
421 memset(&attr, 0, sizeof(attr));
422
423 attr.type = PERF_TYPE_SOFTWARE;
424 attr.config = PERF_COUNT_SW_TASK_CLOCK;
425
426 fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
427
428 if (fd < 0)
429 die("Error: sys_perf_event_open() syscall returned"
430 "with %d (%s)\n", fd, strerror(errno));
431 return fd;
432 }
433
434 static u64 get_cpu_usage_nsec_self(int fd)
435 {
436 u64 runtime;
437 int ret;
438
439 ret = read(fd, &runtime, sizeof(runtime));
440 BUG_ON(ret != sizeof(runtime));
441
442 return runtime;
443 }
444
445 static void *thread_func(void *ctx)
446 {
447 struct task_desc *this_task = ctx;
448 u64 cpu_usage_0, cpu_usage_1;
449 unsigned long i, ret;
450 char comm2[22];
451 int fd;
452
453 sprintf(comm2, ":%s", this_task->comm);
454 prctl(PR_SET_NAME, comm2);
455 fd = self_open_counters();
456
457 again:
458 ret = sem_post(&this_task->ready_for_work);
459 BUG_ON(ret);
460 ret = pthread_mutex_lock(&start_work_mutex);
461 BUG_ON(ret);
462 ret = pthread_mutex_unlock(&start_work_mutex);
463 BUG_ON(ret);
464
465 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
466
467 for (i = 0; i < this_task->nr_events; i++) {
468 this_task->curr_event = i;
469 process_sched_event(this_task, this_task->atoms[i]);
470 }
471
472 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
473 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
474 ret = sem_post(&this_task->work_done_sem);
475 BUG_ON(ret);
476
477 ret = pthread_mutex_lock(&work_done_wait_mutex);
478 BUG_ON(ret);
479 ret = pthread_mutex_unlock(&work_done_wait_mutex);
480 BUG_ON(ret);
481
482 goto again;
483 }
484
485 static void create_tasks(void)
486 {
487 struct task_desc *task;
488 pthread_attr_t attr;
489 unsigned long i;
490 int err;
491
492 err = pthread_attr_init(&attr);
493 BUG_ON(err);
494 err = pthread_attr_setstacksize(&attr, (size_t)(16*1024));
495 BUG_ON(err);
496 err = pthread_mutex_lock(&start_work_mutex);
497 BUG_ON(err);
498 err = pthread_mutex_lock(&work_done_wait_mutex);
499 BUG_ON(err);
500 for (i = 0; i < nr_tasks; i++) {
501 task = tasks[i];
502 sem_init(&task->sleep_sem, 0, 0);
503 sem_init(&task->ready_for_work, 0, 0);
504 sem_init(&task->work_done_sem, 0, 0);
505 task->curr_event = 0;
506 err = pthread_create(&task->thread, &attr, thread_func, task);
507 BUG_ON(err);
508 }
509 }
510
511 static void wait_for_tasks(void)
512 {
513 u64 cpu_usage_0, cpu_usage_1;
514 struct task_desc *task;
515 unsigned long i, ret;
516
517 start_time = get_nsecs();
518 cpu_usage = 0;
519 pthread_mutex_unlock(&work_done_wait_mutex);
520
521 for (i = 0; i < nr_tasks; i++) {
522 task = tasks[i];
523 ret = sem_wait(&task->ready_for_work);
524 BUG_ON(ret);
525 sem_init(&task->ready_for_work, 0, 0);
526 }
527 ret = pthread_mutex_lock(&work_done_wait_mutex);
528 BUG_ON(ret);
529
530 cpu_usage_0 = get_cpu_usage_nsec_parent();
531
532 pthread_mutex_unlock(&start_work_mutex);
533
534 for (i = 0; i < nr_tasks; i++) {
535 task = tasks[i];
536 ret = sem_wait(&task->work_done_sem);
537 BUG_ON(ret);
538 sem_init(&task->work_done_sem, 0, 0);
539 cpu_usage += task->cpu_usage;
540 task->cpu_usage = 0;
541 }
542
543 cpu_usage_1 = get_cpu_usage_nsec_parent();
544 if (!runavg_cpu_usage)
545 runavg_cpu_usage = cpu_usage;
546 runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10;
547
548 parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
549 if (!runavg_parent_cpu_usage)
550 runavg_parent_cpu_usage = parent_cpu_usage;
551 runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 +
552 parent_cpu_usage)/10;
553
554 ret = pthread_mutex_lock(&start_work_mutex);
555 BUG_ON(ret);
556
557 for (i = 0; i < nr_tasks; i++) {
558 task = tasks[i];
559 sem_init(&task->sleep_sem, 0, 0);
560 task->curr_event = 0;
561 }
562 }
563
564 static void run_one_test(void)
565 {
566 u64 T0, T1, delta, avg_delta, fluct, std_dev;
567
568 T0 = get_nsecs();
569 wait_for_tasks();
570 T1 = get_nsecs();
571
572 delta = T1 - T0;
573 sum_runtime += delta;
574 nr_runs++;
575
576 avg_delta = sum_runtime / nr_runs;
577 if (delta < avg_delta)
578 fluct = avg_delta - delta;
579 else
580 fluct = delta - avg_delta;
581 sum_fluct += fluct;
582 std_dev = sum_fluct / nr_runs / sqrt(nr_runs);
583 if (!run_avg)
584 run_avg = delta;
585 run_avg = (run_avg*9 + delta)/10;
586
587 printf("#%-3ld: %0.3f, ",
588 nr_runs, (double)delta/1000000.0);
589
590 printf("ravg: %0.2f, ",
591 (double)run_avg/1e6);
592
593 printf("cpu: %0.2f / %0.2f",
594 (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
595
596 #if 0
597 /*
598 * rusage statistics done by the parent, these are less
599 * accurate than the sum_exec_runtime based statistics:
600 */
601 printf(" [%0.2f / %0.2f]",
602 (double)parent_cpu_usage/1e6,
603 (double)runavg_parent_cpu_usage/1e6);
604 #endif
605
606 printf("\n");
607
608 if (nr_sleep_corrections)
609 printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
610 nr_sleep_corrections = 0;
611 }
612
613 static void test_calibrations(void)
614 {
615 u64 T0, T1;
616
617 T0 = get_nsecs();
618 burn_nsecs(1e6);
619 T1 = get_nsecs();
620
621 printf("the run test took %Ld nsecs\n", T1-T0);
622
623 T0 = get_nsecs();
624 sleep_nsecs(1e6);
625 T1 = get_nsecs();
626
627 printf("the sleep test took %Ld nsecs\n", T1-T0);
628 }
629
630 #define FILL_FIELD(ptr, field, event, data) \
631 ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
632
633 #define FILL_ARRAY(ptr, array, event, data) \
634 do { \
635 void *__array = raw_field_ptr(event, #array, data); \
636 memcpy(ptr.array, __array, sizeof(ptr.array)); \
637 } while(0)
638
639 #define FILL_COMMON_FIELDS(ptr, event, data) \
640 do { \
641 FILL_FIELD(ptr, common_type, event, data); \
642 FILL_FIELD(ptr, common_flags, event, data); \
643 FILL_FIELD(ptr, common_preempt_count, event, data); \
644 FILL_FIELD(ptr, common_pid, event, data); \
645 FILL_FIELD(ptr, common_tgid, event, data); \
646 } while (0)
647
648
649
650 struct trace_switch_event {
651 u32 size;
652
653 u16 common_type;
654 u8 common_flags;
655 u8 common_preempt_count;
656 u32 common_pid;
657 u32 common_tgid;
658
659 char prev_comm[16];
660 u32 prev_pid;
661 u32 prev_prio;
662 u64 prev_state;
663 char next_comm[16];
664 u32 next_pid;
665 u32 next_prio;
666 };
667
668 struct trace_runtime_event {
669 u32 size;
670
671 u16 common_type;
672 u8 common_flags;
673 u8 common_preempt_count;
674 u32 common_pid;
675 u32 common_tgid;
676
677 char comm[16];
678 u32 pid;
679 u64 runtime;
680 u64 vruntime;
681 };
682
683 struct trace_wakeup_event {
684 u32 size;
685
686 u16 common_type;
687 u8 common_flags;
688 u8 common_preempt_count;
689 u32 common_pid;
690 u32 common_tgid;
691
692 char comm[16];
693 u32 pid;
694
695 u32 prio;
696 u32 success;
697 u32 cpu;
698 };
699
700 struct trace_fork_event {
701 u32 size;
702
703 u16 common_type;
704 u8 common_flags;
705 u8 common_preempt_count;
706 u32 common_pid;
707 u32 common_tgid;
708
709 char parent_comm[16];
710 u32 parent_pid;
711 char child_comm[16];
712 u32 child_pid;
713 };
714
715 struct trace_migrate_task_event {
716 u32 size;
717
718 u16 common_type;
719 u8 common_flags;
720 u8 common_preempt_count;
721 u32 common_pid;
722 u32 common_tgid;
723
724 char comm[16];
725 u32 pid;
726
727 u32 prio;
728 u32 cpu;
729 };
730
731 struct trace_sched_handler {
732 void (*switch_event)(struct trace_switch_event *,
733 struct event *,
734 int cpu,
735 u64 timestamp,
736 struct thread *thread);
737
738 void (*runtime_event)(struct trace_runtime_event *,
739 struct event *,
740 int cpu,
741 u64 timestamp,
742 struct thread *thread);
743
744 void (*wakeup_event)(struct trace_wakeup_event *,
745 struct event *,
746 int cpu,
747 u64 timestamp,
748 struct thread *thread);
749
750 void (*fork_event)(struct trace_fork_event *,
751 struct event *,
752 int cpu,
753 u64 timestamp,
754 struct thread *thread);
755
756 void (*migrate_task_event)(struct trace_migrate_task_event *,
757 struct event *,
758 int cpu,
759 u64 timestamp,
760 struct thread *thread);
761 };
762
763
764 static void
765 replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
766 struct event *event,
767 int cpu __used,
768 u64 timestamp __used,
769 struct thread *thread __used)
770 {
771 struct task_desc *waker, *wakee;
772
773 if (verbose) {
774 printf("sched_wakeup event %p\n", event);
775
776 printf(" ... pid %d woke up %s/%d\n",
777 wakeup_event->common_pid,
778 wakeup_event->comm,
779 wakeup_event->pid);
780 }
781
782 waker = register_pid(wakeup_event->common_pid, "<unknown>");
783 wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
784
785 add_sched_event_wakeup(waker, timestamp, wakee);
786 }
787
788 static u64 cpu_last_switched[MAX_CPUS];
789
790 static void
791 replay_switch_event(struct trace_switch_event *switch_event,
792 struct event *event,
793 int cpu,
794 u64 timestamp,
795 struct thread *thread __used)
796 {
797 struct task_desc *prev, *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: %Ld < 0 ?\n", delta);
815
816 if (verbose) {
817 printf(" ... switch from %s/%d to %s/%d [ran %Ld 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 event *event __used,
1026 int cpu,
1027 u64 timestamp,
1028 struct thread *thread __used)
1029 {
1030 struct work_atoms *out_events, *in_events;
1031 struct thread *sched_out, *sched_in;
1032 u64 timestamp0;
1033 s64 delta;
1034
1035 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1036
1037 timestamp0 = cpu_last_switched[cpu];
1038 cpu_last_switched[cpu] = timestamp;
1039 if (timestamp0)
1040 delta = timestamp - timestamp0;
1041 else
1042 delta = 0;
1043
1044 if (delta < 0)
1045 die("hm, delta: %Ld < 0 ?\n", delta);
1046
1047
1048 sched_out = threads__findnew(switch_event->prev_pid);
1049 sched_in = threads__findnew(switch_event->next_pid);
1050
1051 out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1052 if (!out_events) {
1053 thread_atoms_insert(sched_out);
1054 out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1055 if (!out_events)
1056 die("out-event: Internal tree error");
1057 }
1058 add_sched_out_event(out_events, sched_out_state(switch_event), timestamp);
1059
1060 in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1061 if (!in_events) {
1062 thread_atoms_insert(sched_in);
1063 in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1064 if (!in_events)
1065 die("in-event: Internal tree error");
1066 /*
1067 * Take came in we have not heard about yet,
1068 * add in an initial atom in runnable state:
1069 */
1070 add_sched_out_event(in_events, 'R', timestamp);
1071 }
1072 add_sched_in_event(in_events, timestamp);
1073 }
1074
1075 static void
1076 latency_runtime_event(struct trace_runtime_event *runtime_event,
1077 struct event *event __used,
1078 int cpu,
1079 u64 timestamp,
1080 struct thread *this_thread __used)
1081 {
1082 struct thread *thread = threads__findnew(runtime_event->pid);
1083 struct work_atoms *atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1084
1085 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1086 if (!atoms) {
1087 thread_atoms_insert(thread);
1088 atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1089 if (!atoms)
1090 die("in-event: Internal tree error");
1091 add_sched_out_event(atoms, 'R', timestamp);
1092 }
1093
1094 add_runtime_event(atoms, runtime_event->runtime, timestamp);
1095 }
1096
1097 static void
1098 latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
1099 struct event *__event __used,
1100 int cpu __used,
1101 u64 timestamp,
1102 struct thread *thread __used)
1103 {
1104 struct work_atoms *atoms;
1105 struct work_atom *atom;
1106 struct thread *wakee;
1107
1108 /* Note for later, it may be interesting to observe the failing cases */
1109 if (!wakeup_event->success)
1110 return;
1111
1112 wakee = threads__findnew(wakeup_event->pid);
1113 atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1114 if (!atoms) {
1115 thread_atoms_insert(wakee);
1116 atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1117 if (!atoms)
1118 die("wakeup-event: Internal tree error");
1119 add_sched_out_event(atoms, 'S', timestamp);
1120 }
1121
1122 BUG_ON(list_empty(&atoms->work_list));
1123
1124 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1125
1126 /*
1127 * You WILL be missing events if you've recorded only
1128 * one CPU, or are only looking at only one, so don't
1129 * make useless noise.
1130 */
1131 if (profile_cpu == -1 && atom->state != THREAD_SLEEPING)
1132 nr_state_machine_bugs++;
1133
1134 nr_timestamps++;
1135 if (atom->sched_out_time > timestamp) {
1136 nr_unordered_timestamps++;
1137 return;
1138 }
1139
1140 atom->state = THREAD_WAIT_CPU;
1141 atom->wake_up_time = timestamp;
1142 }
1143
1144 static void
1145 latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
1146 struct event *__event __used,
1147 int cpu __used,
1148 u64 timestamp,
1149 struct thread *thread __used)
1150 {
1151 struct work_atoms *atoms;
1152 struct work_atom *atom;
1153 struct thread *migrant;
1154
1155 /*
1156 * Only need to worry about migration when profiling one CPU.
1157 */
1158 if (profile_cpu == -1)
1159 return;
1160
1161 migrant = threads__findnew(migrate_task_event->pid);
1162 atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1163 if (!atoms) {
1164 thread_atoms_insert(migrant);
1165 register_pid(migrant->pid, migrant->comm);
1166 atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1167 if (!atoms)
1168 die("migration-event: Internal tree error");
1169 add_sched_out_event(atoms, 'R', timestamp);
1170 }
1171
1172 BUG_ON(list_empty(&atoms->work_list));
1173
1174 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1175 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1176
1177 nr_timestamps++;
1178
1179 if (atom->sched_out_time > timestamp)
1180 nr_unordered_timestamps++;
1181 }
1182
1183 static struct trace_sched_handler lat_ops = {
1184 .wakeup_event = latency_wakeup_event,
1185 .switch_event = latency_switch_event,
1186 .runtime_event = latency_runtime_event,
1187 .fork_event = latency_fork_event,
1188 .migrate_task_event = latency_migrate_task_event,
1189 };
1190
1191 static void output_lat_thread(struct work_atoms *work_list)
1192 {
1193 int i;
1194 int ret;
1195 u64 avg;
1196
1197 if (!work_list->nb_atoms)
1198 return;
1199 /*
1200 * Ignore idle threads:
1201 */
1202 if (!strcmp(work_list->thread->comm, "swapper"))
1203 return;
1204
1205 all_runtime += work_list->total_runtime;
1206 all_count += work_list->nb_atoms;
1207
1208 ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->pid);
1209
1210 for (i = 0; i < 24 - ret; i++)
1211 printf(" ");
1212
1213 avg = work_list->total_lat / work_list->nb_atoms;
1214
1215 printf("|%11.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms | max at: %9.6f s\n",
1216 (double)work_list->total_runtime / 1e6,
1217 work_list->nb_atoms, (double)avg / 1e6,
1218 (double)work_list->max_lat / 1e6,
1219 (double)work_list->max_lat_at / 1e9);
1220 }
1221
1222 static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
1223 {
1224 if (l->thread->pid < r->thread->pid)
1225 return -1;
1226 if (l->thread->pid > r->thread->pid)
1227 return 1;
1228
1229 return 0;
1230 }
1231
1232 static struct sort_dimension pid_sort_dimension = {
1233 .name = "pid",
1234 .cmp = pid_cmp,
1235 };
1236
1237 static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
1238 {
1239 u64 avgl, avgr;
1240
1241 if (!l->nb_atoms)
1242 return -1;
1243
1244 if (!r->nb_atoms)
1245 return 1;
1246
1247 avgl = l->total_lat / l->nb_atoms;
1248 avgr = r->total_lat / r->nb_atoms;
1249
1250 if (avgl < avgr)
1251 return -1;
1252 if (avgl > avgr)
1253 return 1;
1254
1255 return 0;
1256 }
1257
1258 static struct sort_dimension avg_sort_dimension = {
1259 .name = "avg",
1260 .cmp = avg_cmp,
1261 };
1262
1263 static int max_cmp(struct work_atoms *l, struct work_atoms *r)
1264 {
1265 if (l->max_lat < r->max_lat)
1266 return -1;
1267 if (l->max_lat > r->max_lat)
1268 return 1;
1269
1270 return 0;
1271 }
1272
1273 static struct sort_dimension max_sort_dimension = {
1274 .name = "max",
1275 .cmp = max_cmp,
1276 };
1277
1278 static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
1279 {
1280 if (l->nb_atoms < r->nb_atoms)
1281 return -1;
1282 if (l->nb_atoms > r->nb_atoms)
1283 return 1;
1284
1285 return 0;
1286 }
1287
1288 static struct sort_dimension switch_sort_dimension = {
1289 .name = "switch",
1290 .cmp = switch_cmp,
1291 };
1292
1293 static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
1294 {
1295 if (l->total_runtime < r->total_runtime)
1296 return -1;
1297 if (l->total_runtime > r->total_runtime)
1298 return 1;
1299
1300 return 0;
1301 }
1302
1303 static struct sort_dimension runtime_sort_dimension = {
1304 .name = "runtime",
1305 .cmp = runtime_cmp,
1306 };
1307
1308 static struct sort_dimension *available_sorts[] = {
1309 &pid_sort_dimension,
1310 &avg_sort_dimension,
1311 &max_sort_dimension,
1312 &switch_sort_dimension,
1313 &runtime_sort_dimension,
1314 };
1315
1316 #define NB_AVAILABLE_SORTS (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
1317
1318 static LIST_HEAD(sort_list);
1319
1320 static int sort_dimension__add(const char *tok, struct list_head *list)
1321 {
1322 int i;
1323
1324 for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
1325 if (!strcmp(available_sorts[i]->name, tok)) {
1326 list_add_tail(&available_sorts[i]->list, list);
1327
1328 return 0;
1329 }
1330 }
1331
1332 return -1;
1333 }
1334
1335 static void setup_sorting(void);
1336
1337 static void sort_lat(void)
1338 {
1339 struct rb_node *node;
1340
1341 for (;;) {
1342 struct work_atoms *data;
1343 node = rb_first(&atom_root);
1344 if (!node)
1345 break;
1346
1347 rb_erase(node, &atom_root);
1348 data = rb_entry(node, struct work_atoms, node);
1349 __thread_latency_insert(&sorted_atom_root, data, &sort_list);
1350 }
1351 }
1352
1353 static struct trace_sched_handler *trace_handler;
1354
1355 static void
1356 process_sched_wakeup_event(void *data,
1357 struct event *event,
1358 int cpu __used,
1359 u64 timestamp __used,
1360 struct thread *thread __used)
1361 {
1362 struct trace_wakeup_event wakeup_event;
1363
1364 FILL_COMMON_FIELDS(wakeup_event, event, data);
1365
1366 FILL_ARRAY(wakeup_event, comm, event, data);
1367 FILL_FIELD(wakeup_event, pid, event, data);
1368 FILL_FIELD(wakeup_event, prio, event, data);
1369 FILL_FIELD(wakeup_event, success, event, data);
1370 FILL_FIELD(wakeup_event, cpu, event, data);
1371
1372 if (trace_handler->wakeup_event)
1373 trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
1374 }
1375
1376 /*
1377 * Track the current task - that way we can know whether there's any
1378 * weird events, such as a task being switched away that is not current.
1379 */
1380 static int max_cpu;
1381
1382 static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
1383
1384 static struct thread *curr_thread[MAX_CPUS];
1385
1386 static char next_shortname1 = 'A';
1387 static char next_shortname2 = '0';
1388
1389 static void
1390 map_switch_event(struct trace_switch_event *switch_event,
1391 struct event *event __used,
1392 int this_cpu,
1393 u64 timestamp,
1394 struct thread *thread __used)
1395 {
1396 struct thread *sched_out, *sched_in;
1397 int new_shortname;
1398 u64 timestamp0;
1399 s64 delta;
1400 int cpu;
1401
1402 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1403
1404 if (this_cpu > max_cpu)
1405 max_cpu = this_cpu;
1406
1407 timestamp0 = cpu_last_switched[this_cpu];
1408 cpu_last_switched[this_cpu] = timestamp;
1409 if (timestamp0)
1410 delta = timestamp - timestamp0;
1411 else
1412 delta = 0;
1413
1414 if (delta < 0)
1415 die("hm, delta: %Ld < 0 ?\n", delta);
1416
1417
1418 sched_out = threads__findnew(switch_event->prev_pid);
1419 sched_in = threads__findnew(switch_event->next_pid);
1420
1421 curr_thread[this_cpu] = sched_in;
1422
1423 printf(" ");
1424
1425 new_shortname = 0;
1426 if (!sched_in->shortname[0]) {
1427 sched_in->shortname[0] = next_shortname1;
1428 sched_in->shortname[1] = next_shortname2;
1429
1430 if (next_shortname1 < 'Z') {
1431 next_shortname1++;
1432 } else {
1433 next_shortname1='A';
1434 if (next_shortname2 < '9') {
1435 next_shortname2++;
1436 } else {
1437 next_shortname2='0';
1438 }
1439 }
1440 new_shortname = 1;
1441 }
1442
1443 for (cpu = 0; cpu <= max_cpu; cpu++) {
1444 if (cpu != this_cpu)
1445 printf(" ");
1446 else
1447 printf("*");
1448
1449 if (curr_thread[cpu]) {
1450 if (curr_thread[cpu]->pid)
1451 printf("%2s ", curr_thread[cpu]->shortname);
1452 else
1453 printf(". ");
1454 } else
1455 printf(" ");
1456 }
1457
1458 printf(" %12.6f secs ", (double)timestamp/1e9);
1459 if (new_shortname) {
1460 printf("%s => %s:%d\n",
1461 sched_in->shortname, sched_in->comm, sched_in->pid);
1462 } else {
1463 printf("\n");
1464 }
1465 }
1466
1467
1468 static void
1469 process_sched_switch_event(void *data,
1470 struct event *event,
1471 int this_cpu,
1472 u64 timestamp __used,
1473 struct thread *thread __used)
1474 {
1475 struct trace_switch_event switch_event;
1476
1477 FILL_COMMON_FIELDS(switch_event, event, data);
1478
1479 FILL_ARRAY(switch_event, prev_comm, event, data);
1480 FILL_FIELD(switch_event, prev_pid, event, data);
1481 FILL_FIELD(switch_event, prev_prio, event, data);
1482 FILL_FIELD(switch_event, prev_state, event, data);
1483 FILL_ARRAY(switch_event, next_comm, event, data);
1484 FILL_FIELD(switch_event, next_pid, event, data);
1485 FILL_FIELD(switch_event, next_prio, event, data);
1486
1487 if (curr_pid[this_cpu] != (u32)-1) {
1488 /*
1489 * Are we trying to switch away a PID that is
1490 * not current?
1491 */
1492 if (curr_pid[this_cpu] != switch_event.prev_pid)
1493 nr_context_switch_bugs++;
1494 }
1495 if (trace_handler->switch_event)
1496 trace_handler->switch_event(&switch_event, event, this_cpu, timestamp, thread);
1497
1498 curr_pid[this_cpu] = switch_event.next_pid;
1499 }
1500
1501 static void
1502 process_sched_runtime_event(void *data,
1503 struct event *event,
1504 int cpu __used,
1505 u64 timestamp __used,
1506 struct thread *thread __used)
1507 {
1508 struct trace_runtime_event runtime_event;
1509
1510 FILL_ARRAY(runtime_event, comm, event, data);
1511 FILL_FIELD(runtime_event, pid, event, data);
1512 FILL_FIELD(runtime_event, runtime, event, data);
1513 FILL_FIELD(runtime_event, vruntime, event, data);
1514
1515 if (trace_handler->runtime_event)
1516 trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
1517 }
1518
1519 static void
1520 process_sched_fork_event(void *data,
1521 struct event *event,
1522 int cpu __used,
1523 u64 timestamp __used,
1524 struct thread *thread __used)
1525 {
1526 struct trace_fork_event fork_event;
1527
1528 FILL_COMMON_FIELDS(fork_event, event, data);
1529
1530 FILL_ARRAY(fork_event, parent_comm, event, data);
1531 FILL_FIELD(fork_event, parent_pid, event, data);
1532 FILL_ARRAY(fork_event, child_comm, event, data);
1533 FILL_FIELD(fork_event, child_pid, event, data);
1534
1535 if (trace_handler->fork_event)
1536 trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
1537 }
1538
1539 static void
1540 process_sched_exit_event(struct event *event,
1541 int cpu __used,
1542 u64 timestamp __used,
1543 struct thread *thread __used)
1544 {
1545 if (verbose)
1546 printf("sched_exit event %p\n", event);
1547 }
1548
1549 static void
1550 process_sched_migrate_task_event(void *data,
1551 struct event *event,
1552 int cpu __used,
1553 u64 timestamp __used,
1554 struct thread *thread __used)
1555 {
1556 struct trace_migrate_task_event migrate_task_event;
1557
1558 FILL_COMMON_FIELDS(migrate_task_event, event, data);
1559
1560 FILL_ARRAY(migrate_task_event, comm, event, data);
1561 FILL_FIELD(migrate_task_event, pid, event, data);
1562 FILL_FIELD(migrate_task_event, prio, event, data);
1563 FILL_FIELD(migrate_task_event, cpu, event, data);
1564
1565 if (trace_handler->migrate_task_event)
1566 trace_handler->migrate_task_event(&migrate_task_event, event, cpu, timestamp, thread);
1567 }
1568
1569 static void
1570 process_raw_event(event_t *raw_event __used, void *data,
1571 int cpu, u64 timestamp, struct thread *thread)
1572 {
1573 struct event *event;
1574 int type;
1575
1576
1577 type = trace_parse_common_type(data);
1578 event = trace_find_event(type);
1579
1580 if (!strcmp(event->name, "sched_switch"))
1581 process_sched_switch_event(data, event, cpu, timestamp, thread);
1582 if (!strcmp(event->name, "sched_stat_runtime"))
1583 process_sched_runtime_event(data, event, cpu, timestamp, thread);
1584 if (!strcmp(event->name, "sched_wakeup"))
1585 process_sched_wakeup_event(data, event, cpu, timestamp, thread);
1586 if (!strcmp(event->name, "sched_wakeup_new"))
1587 process_sched_wakeup_event(data, event, cpu, timestamp, thread);
1588 if (!strcmp(event->name, "sched_process_fork"))
1589 process_sched_fork_event(data, event, cpu, timestamp, thread);
1590 if (!strcmp(event->name, "sched_process_exit"))
1591 process_sched_exit_event(event, cpu, timestamp, thread);
1592 if (!strcmp(event->name, "sched_migrate_task"))
1593 process_sched_migrate_task_event(data, event, cpu, timestamp, thread);
1594 }
1595
1596 static int process_sample_event(event_t *event,
1597 struct perf_session *session __used)
1598 {
1599 struct sample_data data;
1600 struct thread *thread;
1601
1602 if (!(sample_type & PERF_SAMPLE_RAW))
1603 return 0;
1604
1605 memset(&data, 0, sizeof(data));
1606 data.time = -1;
1607 data.cpu = -1;
1608 data.period = -1;
1609
1610 event__parse_sample(event, sample_type, &data);
1611
1612 dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
1613 event->header.misc,
1614 data.pid, data.tid,
1615 (void *)(long)data.ip,
1616 (long long)data.period);
1617
1618 thread = threads__findnew(data.pid);
1619 if (thread == NULL) {
1620 pr_debug("problem processing %d event, skipping it.\n",
1621 event->header.type);
1622 return -1;
1623 }
1624
1625 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
1626
1627 if (profile_cpu != -1 && profile_cpu != (int)data.cpu)
1628 return 0;
1629
1630 process_raw_event(event, data.raw_data, data.cpu, data.time, thread);
1631
1632 return 0;
1633 }
1634
1635 static int process_lost_event(event_t *event __used,
1636 struct perf_session *session __used)
1637 {
1638 nr_lost_chunks++;
1639 nr_lost_events += event->lost.lost;
1640
1641 return 0;
1642 }
1643
1644 static int sample_type_check(u64 type)
1645 {
1646 sample_type = type;
1647
1648 if (!(sample_type & PERF_SAMPLE_RAW)) {
1649 fprintf(stderr,
1650 "No trace sample to read. Did you call perf record "
1651 "without -R?");
1652 return -1;
1653 }
1654
1655 return 0;
1656 }
1657
1658 static struct perf_event_ops event_ops = {
1659 .process_sample_event = process_sample_event,
1660 .process_comm_event = event__process_comm,
1661 .process_lost_event = process_lost_event,
1662 .sample_type_check = sample_type_check,
1663 };
1664
1665 static int read_events(void)
1666 {
1667 int err;
1668 struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0);
1669
1670 if (session == NULL)
1671 return -ENOMEM;
1672
1673 register_idle_thread();
1674
1675 err = perf_session__process_events(session, &event_ops, 0,
1676 &event__cwdlen, &event__cwd);
1677 perf_session__delete(session);
1678 return err;
1679 }
1680
1681 static void print_bad_events(void)
1682 {
1683 if (nr_unordered_timestamps && nr_timestamps) {
1684 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
1685 (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
1686 nr_unordered_timestamps, nr_timestamps);
1687 }
1688 if (nr_lost_events && nr_events) {
1689 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
1690 (double)nr_lost_events/(double)nr_events*100.0,
1691 nr_lost_events, nr_events, nr_lost_chunks);
1692 }
1693 if (nr_state_machine_bugs && nr_timestamps) {
1694 printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
1695 (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
1696 nr_state_machine_bugs, nr_timestamps);
1697 if (nr_lost_events)
1698 printf(" (due to lost events?)");
1699 printf("\n");
1700 }
1701 if (nr_context_switch_bugs && nr_timestamps) {
1702 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
1703 (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
1704 nr_context_switch_bugs, nr_timestamps);
1705 if (nr_lost_events)
1706 printf(" (due to lost events?)");
1707 printf("\n");
1708 }
1709 }
1710
1711 static void __cmd_lat(void)
1712 {
1713 struct rb_node *next;
1714
1715 setup_pager();
1716 read_events();
1717 sort_lat();
1718
1719 printf("\n ---------------------------------------------------------------------------------------------------------------\n");
1720 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
1721 printf(" ---------------------------------------------------------------------------------------------------------------\n");
1722
1723 next = rb_first(&sorted_atom_root);
1724
1725 while (next) {
1726 struct work_atoms *work_list;
1727
1728 work_list = rb_entry(next, struct work_atoms, node);
1729 output_lat_thread(work_list);
1730 next = rb_next(next);
1731 }
1732
1733 printf(" -----------------------------------------------------------------------------------------\n");
1734 printf(" TOTAL: |%11.3f ms |%9Ld |\n",
1735 (double)all_runtime/1e6, all_count);
1736
1737 printf(" ---------------------------------------------------\n");
1738
1739 print_bad_events();
1740 printf("\n");
1741
1742 }
1743
1744 static struct trace_sched_handler map_ops = {
1745 .wakeup_event = NULL,
1746 .switch_event = map_switch_event,
1747 .runtime_event = NULL,
1748 .fork_event = NULL,
1749 };
1750
1751 static void __cmd_map(void)
1752 {
1753 max_cpu = sysconf(_SC_NPROCESSORS_CONF);
1754
1755 setup_pager();
1756 read_events();
1757 print_bad_events();
1758 }
1759
1760 static void __cmd_replay(void)
1761 {
1762 unsigned long i;
1763
1764 calibrate_run_measurement_overhead();
1765 calibrate_sleep_measurement_overhead();
1766
1767 test_calibrations();
1768
1769 read_events();
1770
1771 printf("nr_run_events: %ld\n", nr_run_events);
1772 printf("nr_sleep_events: %ld\n", nr_sleep_events);
1773 printf("nr_wakeup_events: %ld\n", nr_wakeup_events);
1774
1775 if (targetless_wakeups)
1776 printf("target-less wakeups: %ld\n", targetless_wakeups);
1777 if (multitarget_wakeups)
1778 printf("multi-target wakeups: %ld\n", multitarget_wakeups);
1779 if (nr_run_events_optimized)
1780 printf("run atoms optimized: %ld\n",
1781 nr_run_events_optimized);
1782
1783 print_task_traces();
1784 add_cross_task_wakeups();
1785
1786 create_tasks();
1787 printf("------------------------------------------------------------\n");
1788 for (i = 0; i < replay_repeat; i++)
1789 run_one_test();
1790 }
1791
1792
1793 static const char * const sched_usage[] = {
1794 "perf sched [<options>] {record|latency|map|replay|trace}",
1795 NULL
1796 };
1797
1798 static const struct option sched_options[] = {
1799 OPT_STRING('i', "input", &input_name, "file",
1800 "input file name"),
1801 OPT_BOOLEAN('v', "verbose", &verbose,
1802 "be more verbose (show symbol address, etc)"),
1803 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1804 "dump raw trace in ASCII"),
1805 OPT_END()
1806 };
1807
1808 static const char * const latency_usage[] = {
1809 "perf sched latency [<options>]",
1810 NULL
1811 };
1812
1813 static const struct option latency_options[] = {
1814 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1815 "sort by key(s): runtime, switch, avg, max"),
1816 OPT_BOOLEAN('v', "verbose", &verbose,
1817 "be more verbose (show symbol address, etc)"),
1818 OPT_INTEGER('C', "CPU", &profile_cpu,
1819 "CPU to profile on"),
1820 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1821 "dump raw trace in ASCII"),
1822 OPT_END()
1823 };
1824
1825 static const char * const replay_usage[] = {
1826 "perf sched replay [<options>]",
1827 NULL
1828 };
1829
1830 static const struct option replay_options[] = {
1831 OPT_INTEGER('r', "repeat", &replay_repeat,
1832 "repeat the workload replay N times (-1: infinite)"),
1833 OPT_BOOLEAN('v', "verbose", &verbose,
1834 "be more verbose (show symbol address, etc)"),
1835 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1836 "dump raw trace in ASCII"),
1837 OPT_END()
1838 };
1839
1840 static void setup_sorting(void)
1841 {
1842 char *tmp, *tok, *str = strdup(sort_order);
1843
1844 for (tok = strtok_r(str, ", ", &tmp);
1845 tok; tok = strtok_r(NULL, ", ", &tmp)) {
1846 if (sort_dimension__add(tok, &sort_list) < 0) {
1847 error("Unknown --sort key: `%s'", tok);
1848 usage_with_options(latency_usage, latency_options);
1849 }
1850 }
1851
1852 free(str);
1853
1854 sort_dimension__add("pid", &cmp_pid);
1855 }
1856
1857 static const char *record_args[] = {
1858 "record",
1859 "-a",
1860 "-R",
1861 "-M",
1862 "-f",
1863 "-m", "1024",
1864 "-c", "1",
1865 "-e", "sched:sched_switch:r",
1866 "-e", "sched:sched_stat_wait:r",
1867 "-e", "sched:sched_stat_sleep:r",
1868 "-e", "sched:sched_stat_iowait:r",
1869 "-e", "sched:sched_stat_runtime:r",
1870 "-e", "sched:sched_process_exit:r",
1871 "-e", "sched:sched_process_fork:r",
1872 "-e", "sched:sched_wakeup:r",
1873 "-e", "sched:sched_migrate_task:r",
1874 };
1875
1876 static int __cmd_record(int argc, const char **argv)
1877 {
1878 unsigned int rec_argc, i, j;
1879 const char **rec_argv;
1880
1881 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1882 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1883
1884 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1885 rec_argv[i] = strdup(record_args[i]);
1886
1887 for (j = 1; j < (unsigned int)argc; j++, i++)
1888 rec_argv[i] = argv[j];
1889
1890 BUG_ON(i != rec_argc);
1891
1892 return cmd_record(i, rec_argv, NULL);
1893 }
1894
1895 int cmd_sched(int argc, const char **argv, const char *prefix __used)
1896 {
1897 argc = parse_options(argc, argv, sched_options, sched_usage,
1898 PARSE_OPT_STOP_AT_NON_OPTION);
1899 if (!argc)
1900 usage_with_options(sched_usage, sched_options);
1901
1902 /*
1903 * Aliased to 'perf trace' for now:
1904 */
1905 if (!strcmp(argv[0], "trace"))
1906 return cmd_trace(argc, argv, prefix);
1907
1908 symbol__init(0);
1909 if (!strncmp(argv[0], "rec", 3)) {
1910 return __cmd_record(argc, argv);
1911 } else if (!strncmp(argv[0], "lat", 3)) {
1912 trace_handler = &lat_ops;
1913 if (argc > 1) {
1914 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
1915 if (argc)
1916 usage_with_options(latency_usage, latency_options);
1917 }
1918 setup_sorting();
1919 __cmd_lat();
1920 } else if (!strcmp(argv[0], "map")) {
1921 trace_handler = &map_ops;
1922 setup_sorting();
1923 __cmd_map();
1924 } else if (!strncmp(argv[0], "rep", 3)) {
1925 trace_handler = &replay_ops;
1926 if (argc) {
1927 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
1928 if (argc)
1929 usage_with_options(replay_usage, replay_options);
1930 }
1931 __cmd_replay();
1932 } else {
1933 usage_with_options(sched_usage, sched_options);
1934 }
1935
1936 return 0;
1937 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree