pwm-backlight: take over maintenance
[linux-3.10.git] / tools / perf / builtin-sched.c
1 #include "builtin.h"
2 #include "perf.h"
3
4 #include "util/util.h"
5 #include "util/evlist.h"
6 #include "util/cache.h"
7 #include "util/evsel.h"
8 #include "util/symbol.h"
9 #include "util/thread.h"
10 #include "util/header.h"
11 #include "util/session.h"
12 #include "util/tool.h"
13
14 #include "util/parse-options.h"
15 #include "util/trace-event.h"
16
17 #include "util/debug.h"
18
19 #include <sys/prctl.h>
20 #include <sys/resource.h>
21
22 #include <semaphore.h>
23 #include <pthread.h>
24 #include <math.h>
25
26 static const char               *input_name;
27
28 static char                     default_sort_order[] = "avg, max, switch, runtime";
29 static const char               *sort_order = default_sort_order;
30
31 static int                      profile_cpu = -1;
32
33 #define PR_SET_NAME             15               /* Set process name */
34 #define MAX_CPUS                4096
35
36 static u64                      run_measurement_overhead;
37 static u64                      sleep_measurement_overhead;
38
39 #define COMM_LEN                20
40 #define SYM_LEN                 129
41
42 #define MAX_PID                 65536
43
44 static unsigned long            nr_tasks;
45
46 struct perf_sched {
47         struct perf_tool    tool;
48         struct perf_session *session;
49 };
50
51 struct sched_atom;
52
53 struct task_desc {
54         unsigned long           nr;
55         unsigned long           pid;
56         char                    comm[COMM_LEN];
57
58         unsigned long           nr_events;
59         unsigned long           curr_event;
60         struct sched_atom       **atoms;
61
62         pthread_t               thread;
63         sem_t                   sleep_sem;
64
65         sem_t                   ready_for_work;
66         sem_t                   work_done_sem;
67
68         u64                     cpu_usage;
69 };
70
71 enum sched_event_type {
72         SCHED_EVENT_RUN,
73         SCHED_EVENT_SLEEP,
74         SCHED_EVENT_WAKEUP,
75         SCHED_EVENT_MIGRATION,
76 };
77
78 struct sched_atom {
79         enum sched_event_type   type;
80         int                     specific_wait;
81         u64                     timestamp;
82         u64                     duration;
83         unsigned long           nr;
84         sem_t                   *wait_sem;
85         struct task_desc        *wakee;
86 };
87
88 static struct task_desc         *pid_to_task[MAX_PID];
89
90 static struct task_desc         **tasks;
91
92 static pthread_mutex_t          start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
93 static u64                      start_time;
94
95 static pthread_mutex_t          work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
96
97 static unsigned long            nr_run_events;
98 static unsigned long            nr_sleep_events;
99 static unsigned long            nr_wakeup_events;
100
101 static unsigned long            nr_sleep_corrections;
102 static unsigned long            nr_run_events_optimized;
103
104 static unsigned long            targetless_wakeups;
105 static unsigned long            multitarget_wakeups;
106
107 static u64                      cpu_usage;
108 static u64                      runavg_cpu_usage;
109 static u64                      parent_cpu_usage;
110 static u64                      runavg_parent_cpu_usage;
111
112 static unsigned long            nr_runs;
113 static u64                      sum_runtime;
114 static u64                      sum_fluct;
115 static u64                      run_avg;
116
117 static unsigned int             replay_repeat = 10;
118 static unsigned long            nr_timestamps;
119 static unsigned long            nr_unordered_timestamps;
120 static unsigned long            nr_state_machine_bugs;
121 static unsigned long            nr_context_switch_bugs;
122 static unsigned long            nr_events;
123 static unsigned long            nr_lost_chunks;
124 static unsigned long            nr_lost_events;
125
126 #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
127
128 enum thread_state {
129         THREAD_SLEEPING = 0,
130         THREAD_WAIT_CPU,
131         THREAD_SCHED_IN,
132         THREAD_IGNORE
133 };
134
135 struct work_atom {
136         struct list_head        list;
137         enum thread_state       state;
138         u64                     sched_out_time;
139         u64                     wake_up_time;
140         u64                     sched_in_time;
141         u64                     runtime;
142 };
143
144 struct work_atoms {
145         struct list_head        work_list;
146         struct thread           *thread;
147         struct rb_node          node;
148         u64                     max_lat;
149         u64                     max_lat_at;
150         u64                     total_lat;
151         u64                     nb_atoms;
152         u64                     total_runtime;
153 };
154
155 typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
156
157 static struct rb_root           atom_root, sorted_atom_root;
158
159 static u64                      all_runtime;
160 static u64                      all_count;
161
162
163 static u64 get_nsecs(void)
164 {
165         struct timespec ts;
166
167         clock_gettime(CLOCK_MONOTONIC, &ts);
168
169         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
170 }
171
172 static void burn_nsecs(u64 nsecs)
173 {
174         u64 T0 = get_nsecs(), T1;
175
176         do {
177                 T1 = get_nsecs();
178         } while (T1 + run_measurement_overhead < T0 + nsecs);
179 }
180
181 static void sleep_nsecs(u64 nsecs)
182 {
183         struct timespec ts;
184
185         ts.tv_nsec = nsecs % 999999999;
186         ts.tv_sec = nsecs / 999999999;
187
188         nanosleep(&ts, NULL);
189 }
190
191 static void calibrate_run_measurement_overhead(void)
192 {
193         u64 T0, T1, delta, min_delta = 1000000000ULL;
194         int i;
195
196         for (i = 0; i < 10; i++) {
197                 T0 = get_nsecs();
198                 burn_nsecs(0);
199                 T1 = get_nsecs();
200                 delta = T1-T0;
201                 min_delta = min(min_delta, delta);
202         }
203         run_measurement_overhead = min_delta;
204
205         printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
206 }
207
208 static void calibrate_sleep_measurement_overhead(void)
209 {
210         u64 T0, T1, delta, min_delta = 1000000000ULL;
211         int i;
212
213         for (i = 0; i < 10; i++) {
214                 T0 = get_nsecs();
215                 sleep_nsecs(10000);
216                 T1 = get_nsecs();
217                 delta = T1-T0;
218                 min_delta = min(min_delta, delta);
219         }
220         min_delta -= 10000;
221         sleep_measurement_overhead = min_delta;
222
223         printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
224 }
225
226 static struct sched_atom *
227 get_new_event(struct task_desc *task, u64 timestamp)
228 {
229         struct sched_atom *event = zalloc(sizeof(*event));
230         unsigned long idx = task->nr_events;
231         size_t size;
232
233         event->timestamp = timestamp;
234         event->nr = idx;
235
236         task->nr_events++;
237         size = sizeof(struct sched_atom *) * task->nr_events;
238         task->atoms = realloc(task->atoms, size);
239         BUG_ON(!task->atoms);
240
241         task->atoms[idx] = event;
242
243         return event;
244 }
245
246 static struct sched_atom *last_event(struct task_desc *task)
247 {
248         if (!task->nr_events)
249                 return NULL;
250
251         return task->atoms[task->nr_events - 1];
252 }
253
254 static void
255 add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
256 {
257         struct sched_atom *event, *curr_event = last_event(task);
258
259         /*
260          * optimize an existing RUN event by merging this one
261          * to it:
262          */
263         if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
264                 nr_run_events_optimized++;
265                 curr_event->duration += duration;
266                 return;
267         }
268
269         event = get_new_event(task, timestamp);
270
271         event->type = SCHED_EVENT_RUN;
272         event->duration = duration;
273
274         nr_run_events++;
275 }
276
277 static void
278 add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
279                        struct task_desc *wakee)
280 {
281         struct sched_atom *event, *wakee_event;
282
283         event = get_new_event(task, timestamp);
284         event->type = SCHED_EVENT_WAKEUP;
285         event->wakee = wakee;
286
287         wakee_event = last_event(wakee);
288         if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
289                 targetless_wakeups++;
290                 return;
291         }
292         if (wakee_event->wait_sem) {
293                 multitarget_wakeups++;
294                 return;
295         }
296
297         wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
298         sem_init(wakee_event->wait_sem, 0, 0);
299         wakee_event->specific_wait = 1;
300         event->wait_sem = wakee_event->wait_sem;
301
302         nr_wakeup_events++;
303 }
304
305 static void
306 add_sched_event_sleep(struct task_desc *task, u64 timestamp,
307                       u64 task_state __used)
308 {
309         struct sched_atom *event = get_new_event(task, timestamp);
310
311         event->type = SCHED_EVENT_SLEEP;
312
313         nr_sleep_events++;
314 }
315
316 static struct task_desc *register_pid(unsigned long pid, const char *comm)
317 {
318         struct task_desc *task;
319
320         BUG_ON(pid >= MAX_PID);
321
322         task = pid_to_task[pid];
323
324         if (task)
325                 return task;
326
327         task = zalloc(sizeof(*task));
328         task->pid = pid;
329         task->nr = nr_tasks;
330         strcpy(task->comm, comm);
331         /*
332          * every task starts in sleeping state - this gets ignored
333          * if there's no wakeup pointing to this sleep state:
334          */
335         add_sched_event_sleep(task, 0, 0);
336
337         pid_to_task[pid] = task;
338         nr_tasks++;
339         tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
340         BUG_ON(!tasks);
341         tasks[task->nr] = task;
342
343         if (verbose)
344                 printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
345
346         return task;
347 }
348
349
350 static void print_task_traces(void)
351 {
352         struct task_desc *task;
353         unsigned long i;
354
355         for (i = 0; i < nr_tasks; i++) {
356                 task = tasks[i];
357                 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
358                         task->nr, task->comm, task->pid, task->nr_events);
359         }
360 }
361
362 static void add_cross_task_wakeups(void)
363 {
364         struct task_desc *task1, *task2;
365         unsigned long i, j;
366
367         for (i = 0; i < nr_tasks; i++) {
368                 task1 = tasks[i];
369                 j = i + 1;
370                 if (j == nr_tasks)
371                         j = 0;
372                 task2 = tasks[j];
373                 add_sched_event_wakeup(task1, 0, task2);
374         }
375 }
376
377 static void
378 process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
379 {
380         int ret = 0;
381
382         switch (atom->type) {
383                 case SCHED_EVENT_RUN:
384                         burn_nsecs(atom->duration);
385                         break;
386                 case SCHED_EVENT_SLEEP:
387                         if (atom->wait_sem)
388                                 ret = sem_wait(atom->wait_sem);
389                         BUG_ON(ret);
390                         break;
391                 case SCHED_EVENT_WAKEUP:
392                         if (atom->wait_sem)
393                                 ret = sem_post(atom->wait_sem);
394                         BUG_ON(ret);
395                         break;
396                 case SCHED_EVENT_MIGRATION:
397                         break;
398                 default:
399                         BUG_ON(1);
400         }
401 }
402
403 static u64 get_cpu_usage_nsec_parent(void)
404 {
405         struct rusage ru;
406         u64 sum;
407         int err;
408
409         err = getrusage(RUSAGE_SELF, &ru);
410         BUG_ON(err);
411
412         sum =  ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3;
413         sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3;
414
415         return sum;
416 }
417
418 static int self_open_counters(void)
419 {
420         struct perf_event_attr attr;
421         int fd;
422
423         memset(&attr, 0, sizeof(attr));
424
425         attr.type = PERF_TYPE_SOFTWARE;
426         attr.config = PERF_COUNT_SW_TASK_CLOCK;
427
428         fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
429
430         if (fd < 0)
431                 die("Error: sys_perf_event_open() syscall returned"
432                     "with %d (%s)\n", fd, strerror(errno));
433         return fd;
434 }
435
436 static u64 get_cpu_usage_nsec_self(int fd)
437 {
438         u64 runtime;
439         int ret;
440
441         ret = read(fd, &runtime, sizeof(runtime));
442         BUG_ON(ret != sizeof(runtime));
443
444         return runtime;
445 }
446
447 static void *thread_func(void *ctx)
448 {
449         struct task_desc *this_task = ctx;
450         u64 cpu_usage_0, cpu_usage_1;
451         unsigned long i, ret;
452         char comm2[22];
453         int fd;
454
455         sprintf(comm2, ":%s", this_task->comm);
456         prctl(PR_SET_NAME, comm2);
457         fd = self_open_counters();
458
459 again:
460         ret = sem_post(&this_task->ready_for_work);
461         BUG_ON(ret);
462         ret = pthread_mutex_lock(&start_work_mutex);
463         BUG_ON(ret);
464         ret = pthread_mutex_unlock(&start_work_mutex);
465         BUG_ON(ret);
466
467         cpu_usage_0 = get_cpu_usage_nsec_self(fd);
468
469         for (i = 0; i < this_task->nr_events; i++) {
470                 this_task->curr_event = i;
471                 process_sched_event(this_task, this_task->atoms[i]);
472         }
473
474         cpu_usage_1 = get_cpu_usage_nsec_self(fd);
475         this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
476         ret = sem_post(&this_task->work_done_sem);
477         BUG_ON(ret);
478
479         ret = pthread_mutex_lock(&work_done_wait_mutex);
480         BUG_ON(ret);
481         ret = pthread_mutex_unlock(&work_done_wait_mutex);
482         BUG_ON(ret);
483
484         goto again;
485 }
486
487 static void create_tasks(void)
488 {
489         struct task_desc *task;
490         pthread_attr_t attr;
491         unsigned long i;
492         int err;
493
494         err = pthread_attr_init(&attr);
495         BUG_ON(err);
496         err = pthread_attr_setstacksize(&attr,
497                         (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
498         BUG_ON(err);
499         err = pthread_mutex_lock(&start_work_mutex);
500         BUG_ON(err);
501         err = pthread_mutex_lock(&work_done_wait_mutex);
502         BUG_ON(err);
503         for (i = 0; i < nr_tasks; i++) {
504                 task = tasks[i];
505                 sem_init(&task->sleep_sem, 0, 0);
506                 sem_init(&task->ready_for_work, 0, 0);
507                 sem_init(&task->work_done_sem, 0, 0);
508                 task->curr_event = 0;
509                 err = pthread_create(&task->thread, &attr, thread_func, task);
510                 BUG_ON(err);
511         }
512 }
513
514 static void wait_for_tasks(void)
515 {
516         u64 cpu_usage_0, cpu_usage_1;
517         struct task_desc *task;
518         unsigned long i, ret;
519
520         start_time = get_nsecs();
521         cpu_usage = 0;
522         pthread_mutex_unlock(&work_done_wait_mutex);
523
524         for (i = 0; i < nr_tasks; i++) {
525                 task = tasks[i];
526                 ret = sem_wait(&task->ready_for_work);
527                 BUG_ON(ret);
528                 sem_init(&task->ready_for_work, 0, 0);
529         }
530         ret = pthread_mutex_lock(&work_done_wait_mutex);
531         BUG_ON(ret);
532
533         cpu_usage_0 = get_cpu_usage_nsec_parent();
534
535         pthread_mutex_unlock(&start_work_mutex);
536
537         for (i = 0; i < nr_tasks; i++) {
538                 task = tasks[i];
539                 ret = sem_wait(&task->work_done_sem);
540                 BUG_ON(ret);
541                 sem_init(&task->work_done_sem, 0, 0);
542                 cpu_usage += task->cpu_usage;
543                 task->cpu_usage = 0;
544         }
545
546         cpu_usage_1 = get_cpu_usage_nsec_parent();
547         if (!runavg_cpu_usage)
548                 runavg_cpu_usage = cpu_usage;
549         runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10;
550
551         parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
552         if (!runavg_parent_cpu_usage)
553                 runavg_parent_cpu_usage = parent_cpu_usage;
554         runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 +
555                                    parent_cpu_usage)/10;
556
557         ret = pthread_mutex_lock(&start_work_mutex);
558         BUG_ON(ret);
559
560         for (i = 0; i < nr_tasks; i++) {
561                 task = tasks[i];
562                 sem_init(&task->sleep_sem, 0, 0);
563                 task->curr_event = 0;
564         }
565 }
566
567 static void run_one_test(void)
568 {
569         u64 T0, T1, delta, avg_delta, fluct;
570
571         T0 = get_nsecs();
572         wait_for_tasks();
573         T1 = get_nsecs();
574
575         delta = T1 - T0;
576         sum_runtime += delta;
577         nr_runs++;
578
579         avg_delta = sum_runtime / nr_runs;
580         if (delta < avg_delta)
581                 fluct = avg_delta - delta;
582         else
583                 fluct = delta - avg_delta;
584         sum_fluct += fluct;
585         if (!run_avg)
586                 run_avg = delta;
587         run_avg = (run_avg*9 + delta)/10;
588
589         printf("#%-3ld: %0.3f, ",
590                 nr_runs, (double)delta/1000000.0);
591
592         printf("ravg: %0.2f, ",
593                 (double)run_avg/1e6);
594
595         printf("cpu: %0.2f / %0.2f",
596                 (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
597
598 #if 0
599         /*
600          * rusage statistics done by the parent, these are less
601          * accurate than the sum_exec_runtime based statistics:
602          */
603         printf(" [%0.2f / %0.2f]",
604                 (double)parent_cpu_usage/1e6,
605                 (double)runavg_parent_cpu_usage/1e6);
606 #endif
607
608         printf("\n");
609
610         if (nr_sleep_corrections)
611                 printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
612         nr_sleep_corrections = 0;
613 }
614
615 static void test_calibrations(void)
616 {
617         u64 T0, T1;
618
619         T0 = get_nsecs();
620         burn_nsecs(1e6);
621         T1 = get_nsecs();
622
623         printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
624
625         T0 = get_nsecs();
626         sleep_nsecs(1e6);
627         T1 = get_nsecs();
628
629         printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
630 }
631
632 #define FILL_FIELD(ptr, field, event, data)     \
633         ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
634
635 #define FILL_ARRAY(ptr, array, event, data)                     \
636 do {                                                            \
637         void *__array = raw_field_ptr(event, #array, data);     \
638         memcpy(ptr.array, __array, sizeof(ptr.array));  \
639 } while(0)
640
641 #define FILL_COMMON_FIELDS(ptr, event, data)                    \
642 do {                                                            \
643         FILL_FIELD(ptr, common_type, event, data);              \
644         FILL_FIELD(ptr, common_flags, event, data);             \
645         FILL_FIELD(ptr, common_preempt_count, event, data);     \
646         FILL_FIELD(ptr, common_pid, event, data);               \
647         FILL_FIELD(ptr, common_tgid, event, data);              \
648 } while (0)
649
650
651
652 struct trace_switch_event {
653         u32 size;
654
655         u16 common_type;
656         u8 common_flags;
657         u8 common_preempt_count;
658         u32 common_pid;
659         u32 common_tgid;
660
661         char prev_comm[16];
662         u32 prev_pid;
663         u32 prev_prio;
664         u64 prev_state;
665         char next_comm[16];
666         u32 next_pid;
667         u32 next_prio;
668 };
669
670 struct trace_runtime_event {
671         u32 size;
672
673         u16 common_type;
674         u8 common_flags;
675         u8 common_preempt_count;
676         u32 common_pid;
677         u32 common_tgid;
678
679         char comm[16];
680         u32 pid;
681         u64 runtime;
682         u64 vruntime;
683 };
684
685 struct trace_wakeup_event {
686         u32 size;
687
688         u16 common_type;
689         u8 common_flags;
690         u8 common_preempt_count;
691         u32 common_pid;
692         u32 common_tgid;
693
694         char comm[16];
695         u32 pid;
696
697         u32 prio;
698         u32 success;
699         u32 cpu;
700 };
701
702 struct trace_fork_event {
703         u32 size;
704
705         u16 common_type;
706         u8 common_flags;
707         u8 common_preempt_count;
708         u32 common_pid;
709         u32 common_tgid;
710
711         char parent_comm[16];
712         u32 parent_pid;
713         char child_comm[16];
714         u32 child_pid;
715 };
716
717 struct trace_migrate_task_event {
718         u32 size;
719
720         u16 common_type;
721         u8 common_flags;
722         u8 common_preempt_count;
723         u32 common_pid;
724         u32 common_tgid;
725
726         char comm[16];
727         u32 pid;
728
729         u32 prio;
730         u32 cpu;
731 };
732
733 struct trace_sched_handler {
734         void (*switch_event)(struct trace_switch_event *,
735                              struct machine *,
736                              struct event_format *,
737                              int cpu,
738                              u64 timestamp,
739                              struct thread *thread);
740
741         void (*runtime_event)(struct trace_runtime_event *,
742                               struct machine *,
743                               struct event_format *,
744                               int cpu,
745                               u64 timestamp,
746                               struct thread *thread);
747
748         void (*wakeup_event)(struct trace_wakeup_event *,
749                              struct machine *,
750                              struct event_format *,
751                              int cpu,
752                              u64 timestamp,
753                              struct thread *thread);
754
755         void (*fork_event)(struct trace_fork_event *,
756                            struct event_format *,
757                            int cpu,
758                            u64 timestamp,
759                            struct thread *thread);
760
761         void (*migrate_task_event)(struct trace_migrate_task_event *,
762                            struct machine *machine,
763                            struct event_format *,
764                            int cpu,
765                            u64 timestamp,
766                            struct thread *thread);
767 };
768
769
770 static void
771 replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
772                     struct machine *machine __used,
773                     struct event_format *event,
774                     int cpu __used,
775                     u64 timestamp __used,
776                     struct thread *thread __used)
777 {
778         struct task_desc *waker, *wakee;
779
780         if (verbose) {
781                 printf("sched_wakeup event %p\n", event);
782
783                 printf(" ... pid %d woke up %s/%d\n",
784                         wakeup_event->common_pid,
785                         wakeup_event->comm,
786                         wakeup_event->pid);
787         }
788
789         waker = register_pid(wakeup_event->common_pid, "<unknown>");
790         wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
791
792         add_sched_event_wakeup(waker, timestamp, wakee);
793 }
794
795 static u64 cpu_last_switched[MAX_CPUS];
796
797 static void
798 replay_switch_event(struct trace_switch_event *switch_event,
799                     struct machine *machine __used,
800                     struct event_format *event,
801                     int cpu,
802                     u64 timestamp,
803                     struct thread *thread __used)
804 {
805         struct task_desc *prev, __used *next;
806         u64 timestamp0;
807         s64 delta;
808
809         if (verbose)
810                 printf("sched_switch event %p\n", event);
811
812         if (cpu >= MAX_CPUS || cpu < 0)
813                 return;
814
815         timestamp0 = cpu_last_switched[cpu];
816         if (timestamp0)
817                 delta = timestamp - timestamp0;
818         else
819                 delta = 0;
820
821         if (delta < 0)
822                 die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
823
824         if (verbose) {
825                 printf(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
826                         switch_event->prev_comm, switch_event->prev_pid,
827                         switch_event->next_comm, switch_event->next_pid,
828                         delta);
829         }
830
831         prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
832         next = register_pid(switch_event->next_pid, switch_event->next_comm);
833
834         cpu_last_switched[cpu] = timestamp;
835
836         add_sched_event_run(prev, timestamp, delta);
837         add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
838 }
839
840
841 static void
842 replay_fork_event(struct trace_fork_event *fork_event,
843                   struct event_format *event,
844                   int cpu __used,
845                   u64 timestamp __used,
846                   struct thread *thread __used)
847 {
848         if (verbose) {
849                 printf("sched_fork event %p\n", event);
850                 printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
851                 printf("...  child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
852         }
853         register_pid(fork_event->parent_pid, fork_event->parent_comm);
854         register_pid(fork_event->child_pid, fork_event->child_comm);
855 }
856
857 static struct trace_sched_handler replay_ops  = {
858         .wakeup_event           = replay_wakeup_event,
859         .switch_event           = replay_switch_event,
860         .fork_event             = replay_fork_event,
861 };
862
863 struct sort_dimension {
864         const char              *name;
865         sort_fn_t               cmp;
866         struct list_head        list;
867 };
868
869 static LIST_HEAD(cmp_pid);
870
871 static int
872 thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
873 {
874         struct sort_dimension *sort;
875         int ret = 0;
876
877         BUG_ON(list_empty(list));
878
879         list_for_each_entry(sort, list, list) {
880                 ret = sort->cmp(l, r);
881                 if (ret)
882                         return ret;
883         }
884
885         return ret;
886 }
887
888 static struct work_atoms *
889 thread_atoms_search(struct rb_root *root, struct thread *thread,
890                          struct list_head *sort_list)
891 {
892         struct rb_node *node = root->rb_node;
893         struct work_atoms key = { .thread = thread };
894
895         while (node) {
896                 struct work_atoms *atoms;
897                 int cmp;
898
899                 atoms = container_of(node, struct work_atoms, node);
900
901                 cmp = thread_lat_cmp(sort_list, &key, atoms);
902                 if (cmp > 0)
903                         node = node->rb_left;
904                 else if (cmp < 0)
905                         node = node->rb_right;
906                 else {
907                         BUG_ON(thread != atoms->thread);
908                         return atoms;
909                 }
910         }
911         return NULL;
912 }
913
914 static void
915 __thread_latency_insert(struct rb_root *root, struct work_atoms *data,
916                          struct list_head *sort_list)
917 {
918         struct rb_node **new = &(root->rb_node), *parent = NULL;
919
920         while (*new) {
921                 struct work_atoms *this;
922                 int cmp;
923
924                 this = container_of(*new, struct work_atoms, node);
925                 parent = *new;
926
927                 cmp = thread_lat_cmp(sort_list, data, this);
928
929                 if (cmp > 0)
930                         new = &((*new)->rb_left);
931                 else
932                         new = &((*new)->rb_right);
933         }
934
935         rb_link_node(&data->node, parent, new);
936         rb_insert_color(&data->node, root);
937 }
938
939 static void thread_atoms_insert(struct thread *thread)
940 {
941         struct work_atoms *atoms = zalloc(sizeof(*atoms));
942         if (!atoms)
943                 die("No memory");
944
945         atoms->thread = thread;
946         INIT_LIST_HEAD(&atoms->work_list);
947         __thread_latency_insert(&atom_root, atoms, &cmp_pid);
948 }
949
950 static void
951 latency_fork_event(struct trace_fork_event *fork_event __used,
952                    struct event_format *event __used,
953                    int cpu __used,
954                    u64 timestamp __used,
955                    struct thread *thread __used)
956 {
957         /* should insert the newcomer */
958 }
959
960 __used
961 static char sched_out_state(struct trace_switch_event *switch_event)
962 {
963         const char *str = TASK_STATE_TO_CHAR_STR;
964
965         return str[switch_event->prev_state];
966 }
967
968 static void
969 add_sched_out_event(struct work_atoms *atoms,
970                     char run_state,
971                     u64 timestamp)
972 {
973         struct work_atom *atom = zalloc(sizeof(*atom));
974         if (!atom)
975                 die("Non memory");
976
977         atom->sched_out_time = timestamp;
978
979         if (run_state == 'R') {
980                 atom->state = THREAD_WAIT_CPU;
981                 atom->wake_up_time = atom->sched_out_time;
982         }
983
984         list_add_tail(&atom->list, &atoms->work_list);
985 }
986
987 static void
988 add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used)
989 {
990         struct work_atom *atom;
991
992         BUG_ON(list_empty(&atoms->work_list));
993
994         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
995
996         atom->runtime += delta;
997         atoms->total_runtime += delta;
998 }
999
1000 static void
1001 add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
1002 {
1003         struct work_atom *atom;
1004         u64 delta;
1005
1006         if (list_empty(&atoms->work_list))
1007                 return;
1008
1009         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1010
1011         if (atom->state != THREAD_WAIT_CPU)
1012                 return;
1013
1014         if (timestamp < atom->wake_up_time) {
1015                 atom->state = THREAD_IGNORE;
1016                 return;
1017         }
1018
1019         atom->state = THREAD_SCHED_IN;
1020         atom->sched_in_time = timestamp;
1021
1022         delta = atom->sched_in_time - atom->wake_up_time;
1023         atoms->total_lat += delta;
1024         if (delta > atoms->max_lat) {
1025                 atoms->max_lat = delta;
1026                 atoms->max_lat_at = timestamp;
1027         }
1028         atoms->nb_atoms++;
1029 }
1030
1031 static void
1032 latency_switch_event(struct trace_switch_event *switch_event,
1033                      struct machine *machine,
1034                      struct event_format *event __used,
1035                      int cpu,
1036                      u64 timestamp,
1037                      struct thread *thread __used)
1038 {
1039         struct work_atoms *out_events, *in_events;
1040         struct thread *sched_out, *sched_in;
1041         u64 timestamp0;
1042         s64 delta;
1043
1044         BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1045
1046         timestamp0 = cpu_last_switched[cpu];
1047         cpu_last_switched[cpu] = timestamp;
1048         if (timestamp0)
1049                 delta = timestamp - timestamp0;
1050         else
1051                 delta = 0;
1052
1053         if (delta < 0)
1054                 die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1055
1056
1057         sched_out = machine__findnew_thread(machine, switch_event->prev_pid);
1058         sched_in = machine__findnew_thread(machine, switch_event->next_pid);
1059
1060         out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1061         if (!out_events) {
1062                 thread_atoms_insert(sched_out);
1063                 out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1064                 if (!out_events)
1065                         die("out-event: Internal tree error");
1066         }
1067         add_sched_out_event(out_events, sched_out_state(switch_event), timestamp);
1068
1069         in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1070         if (!in_events) {
1071                 thread_atoms_insert(sched_in);
1072                 in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1073                 if (!in_events)
1074                         die("in-event: Internal tree error");
1075                 /*
1076                  * Take came in we have not heard about yet,
1077                  * add in an initial atom in runnable state:
1078                  */
1079                 add_sched_out_event(in_events, 'R', timestamp);
1080         }
1081         add_sched_in_event(in_events, timestamp);
1082 }
1083
1084 static void
1085 latency_runtime_event(struct trace_runtime_event *runtime_event,
1086                      struct machine *machine,
1087                      struct event_format *event __used,
1088                      int cpu,
1089                      u64 timestamp,
1090                      struct thread *this_thread __used)
1091 {
1092         struct thread *thread = machine__findnew_thread(machine, runtime_event->pid);
1093         struct work_atoms *atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1094
1095         BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1096         if (!atoms) {
1097                 thread_atoms_insert(thread);
1098                 atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1099                 if (!atoms)
1100                         die("in-event: Internal tree error");
1101                 add_sched_out_event(atoms, 'R', timestamp);
1102         }
1103
1104         add_runtime_event(atoms, runtime_event->runtime, timestamp);
1105 }
1106
1107 static void
1108 latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
1109                      struct machine *machine,
1110                      struct event_format *__event __used,
1111                      int cpu __used,
1112                      u64 timestamp,
1113                      struct thread *thread __used)
1114 {
1115         struct work_atoms *atoms;
1116         struct work_atom *atom;
1117         struct thread *wakee;
1118
1119         /* Note for later, it may be interesting to observe the failing cases */
1120         if (!wakeup_event->success)
1121                 return;
1122
1123         wakee = machine__findnew_thread(machine, wakeup_event->pid);
1124         atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1125         if (!atoms) {
1126                 thread_atoms_insert(wakee);
1127                 atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1128                 if (!atoms)
1129                         die("wakeup-event: Internal tree error");
1130                 add_sched_out_event(atoms, 'S', timestamp);
1131         }
1132
1133         BUG_ON(list_empty(&atoms->work_list));
1134
1135         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1136
1137         /*
1138          * You WILL be missing events if you've recorded only
1139          * one CPU, or are only looking at only one, so don't
1140          * make useless noise.
1141          */
1142         if (profile_cpu == -1 && atom->state != THREAD_SLEEPING)
1143                 nr_state_machine_bugs++;
1144
1145         nr_timestamps++;
1146         if (atom->sched_out_time > timestamp) {
1147                 nr_unordered_timestamps++;
1148                 return;
1149         }
1150
1151         atom->state = THREAD_WAIT_CPU;
1152         atom->wake_up_time = timestamp;
1153 }
1154
1155 static void
1156 latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
1157                      struct machine *machine,
1158                      struct event_format *__event __used,
1159                      int cpu __used,
1160                      u64 timestamp,
1161                      struct thread *thread __used)
1162 {
1163         struct work_atoms *atoms;
1164         struct work_atom *atom;
1165         struct thread *migrant;
1166
1167         /*
1168          * Only need to worry about migration when profiling one CPU.
1169          */
1170         if (profile_cpu == -1)
1171                 return;
1172
1173         migrant = machine__findnew_thread(machine, migrate_task_event->pid);
1174         atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1175         if (!atoms) {
1176                 thread_atoms_insert(migrant);
1177                 register_pid(migrant->pid, migrant->comm);
1178                 atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1179                 if (!atoms)
1180                         die("migration-event: Internal tree error");
1181                 add_sched_out_event(atoms, 'R', timestamp);
1182         }
1183
1184         BUG_ON(list_empty(&atoms->work_list));
1185
1186         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1187         atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1188
1189         nr_timestamps++;
1190
1191         if (atom->sched_out_time > timestamp)
1192                 nr_unordered_timestamps++;
1193 }
1194
1195 static struct trace_sched_handler lat_ops  = {
1196         .wakeup_event           = latency_wakeup_event,
1197         .switch_event           = latency_switch_event,
1198         .runtime_event          = latency_runtime_event,
1199         .fork_event             = latency_fork_event,
1200         .migrate_task_event     = latency_migrate_task_event,
1201 };
1202
1203 static void output_lat_thread(struct work_atoms *work_list)
1204 {
1205         int i;
1206         int ret;
1207         u64 avg;
1208
1209         if (!work_list->nb_atoms)
1210                 return;
1211         /*
1212          * Ignore idle threads:
1213          */
1214         if (!strcmp(work_list->thread->comm, "swapper"))
1215                 return;
1216
1217         all_runtime += work_list->total_runtime;
1218         all_count += work_list->nb_atoms;
1219
1220         ret = printf("  %s:%d ", work_list->thread->comm, work_list->thread->pid);
1221
1222         for (i = 0; i < 24 - ret; i++)
1223                 printf(" ");
1224
1225         avg = work_list->total_lat / work_list->nb_atoms;
1226
1227         printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %9.6f s\n",
1228               (double)work_list->total_runtime / 1e6,
1229                  work_list->nb_atoms, (double)avg / 1e6,
1230                  (double)work_list->max_lat / 1e6,
1231                  (double)work_list->max_lat_at / 1e9);
1232 }
1233
1234 static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
1235 {
1236         if (l->thread->pid < r->thread->pid)
1237                 return -1;
1238         if (l->thread->pid > r->thread->pid)
1239                 return 1;
1240
1241         return 0;
1242 }
1243
1244 static struct sort_dimension pid_sort_dimension = {
1245         .name                   = "pid",
1246         .cmp                    = pid_cmp,
1247 };
1248
1249 static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
1250 {
1251         u64 avgl, avgr;
1252
1253         if (!l->nb_atoms)
1254                 return -1;
1255
1256         if (!r->nb_atoms)
1257                 return 1;
1258
1259         avgl = l->total_lat / l->nb_atoms;
1260         avgr = r->total_lat / r->nb_atoms;
1261
1262         if (avgl < avgr)
1263                 return -1;
1264         if (avgl > avgr)
1265                 return 1;
1266
1267         return 0;
1268 }
1269
1270 static struct sort_dimension avg_sort_dimension = {
1271         .name                   = "avg",
1272         .cmp                    = avg_cmp,
1273 };
1274
1275 static int max_cmp(struct work_atoms *l, struct work_atoms *r)
1276 {
1277         if (l->max_lat < r->max_lat)
1278                 return -1;
1279         if (l->max_lat > r->max_lat)
1280                 return 1;
1281
1282         return 0;
1283 }
1284
1285 static struct sort_dimension max_sort_dimension = {
1286         .name                   = "max",
1287         .cmp                    = max_cmp,
1288 };
1289
1290 static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
1291 {
1292         if (l->nb_atoms < r->nb_atoms)
1293                 return -1;
1294         if (l->nb_atoms > r->nb_atoms)
1295                 return 1;
1296
1297         return 0;
1298 }
1299
1300 static struct sort_dimension switch_sort_dimension = {
1301         .name                   = "switch",
1302         .cmp                    = switch_cmp,
1303 };
1304
1305 static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
1306 {
1307         if (l->total_runtime < r->total_runtime)
1308                 return -1;
1309         if (l->total_runtime > r->total_runtime)
1310                 return 1;
1311
1312         return 0;
1313 }
1314
1315 static struct sort_dimension runtime_sort_dimension = {
1316         .name                   = "runtime",
1317         .cmp                    = runtime_cmp,
1318 };
1319
1320 static struct sort_dimension *available_sorts[] = {
1321         &pid_sort_dimension,
1322         &avg_sort_dimension,
1323         &max_sort_dimension,
1324         &switch_sort_dimension,
1325         &runtime_sort_dimension,
1326 };
1327
1328 #define NB_AVAILABLE_SORTS      (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
1329
1330 static LIST_HEAD(sort_list);
1331
1332 static int sort_dimension__add(const char *tok, struct list_head *list)
1333 {
1334         int i;
1335
1336         for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
1337                 if (!strcmp(available_sorts[i]->name, tok)) {
1338                         list_add_tail(&available_sorts[i]->list, list);
1339
1340                         return 0;
1341                 }
1342         }
1343
1344         return -1;
1345 }
1346
1347 static void setup_sorting(void);
1348
1349 static void sort_lat(void)
1350 {
1351         struct rb_node *node;
1352
1353         for (;;) {
1354                 struct work_atoms *data;
1355                 node = rb_first(&atom_root);
1356                 if (!node)
1357                         break;
1358
1359                 rb_erase(node, &atom_root);
1360                 data = rb_entry(node, struct work_atoms, node);
1361                 __thread_latency_insert(&sorted_atom_root, data, &sort_list);
1362         }
1363 }
1364
1365 static struct trace_sched_handler *trace_handler;
1366
1367 static void
1368 process_sched_wakeup_event(struct perf_tool *tool __used,
1369                            struct event_format *event,
1370                            struct perf_sample *sample,
1371                            struct machine *machine,
1372                            struct thread *thread)
1373 {
1374         void *data = sample->raw_data;
1375         struct trace_wakeup_event wakeup_event;
1376
1377         FILL_COMMON_FIELDS(wakeup_event, event, data);
1378
1379         FILL_ARRAY(wakeup_event, comm, event, data);
1380         FILL_FIELD(wakeup_event, pid, event, data);
1381         FILL_FIELD(wakeup_event, prio, event, data);
1382         FILL_FIELD(wakeup_event, success, event, data);
1383         FILL_FIELD(wakeup_event, cpu, event, data);
1384
1385         if (trace_handler->wakeup_event)
1386                 trace_handler->wakeup_event(&wakeup_event, machine, event,
1387                                             sample->cpu, sample->time, thread);
1388 }
1389
1390 /*
1391  * Track the current task - that way we can know whether there's any
1392  * weird events, such as a task being switched away that is not current.
1393  */
1394 static int max_cpu;
1395
1396 static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
1397
1398 static struct thread *curr_thread[MAX_CPUS];
1399
1400 static char next_shortname1 = 'A';
1401 static char next_shortname2 = '0';
1402
1403 static void
1404 map_switch_event(struct trace_switch_event *switch_event,
1405                  struct machine *machine,
1406                  struct event_format *event __used,
1407                  int this_cpu,
1408                  u64 timestamp,
1409                  struct thread *thread __used)
1410 {
1411         struct thread *sched_out __used, *sched_in;
1412         int new_shortname;
1413         u64 timestamp0;
1414         s64 delta;
1415         int cpu;
1416
1417         BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1418
1419         if (this_cpu > max_cpu)
1420                 max_cpu = this_cpu;
1421
1422         timestamp0 = cpu_last_switched[this_cpu];
1423         cpu_last_switched[this_cpu] = timestamp;
1424         if (timestamp0)
1425                 delta = timestamp - timestamp0;
1426         else
1427                 delta = 0;
1428
1429         if (delta < 0)
1430                 die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1431
1432
1433         sched_out = machine__findnew_thread(machine, switch_event->prev_pid);
1434         sched_in = machine__findnew_thread(machine, switch_event->next_pid);
1435
1436         curr_thread[this_cpu] = sched_in;
1437
1438         printf("  ");
1439
1440         new_shortname = 0;
1441         if (!sched_in->shortname[0]) {
1442                 sched_in->shortname[0] = next_shortname1;
1443                 sched_in->shortname[1] = next_shortname2;
1444
1445                 if (next_shortname1 < 'Z') {
1446                         next_shortname1++;
1447                 } else {
1448                         next_shortname1='A';
1449                         if (next_shortname2 < '9') {
1450                                 next_shortname2++;
1451                         } else {
1452                                 next_shortname2='0';
1453                         }
1454                 }
1455                 new_shortname = 1;
1456         }
1457
1458         for (cpu = 0; cpu <= max_cpu; cpu++) {
1459                 if (cpu != this_cpu)
1460                         printf(" ");
1461                 else
1462                         printf("*");
1463
1464                 if (curr_thread[cpu]) {
1465                         if (curr_thread[cpu]->pid)
1466                                 printf("%2s ", curr_thread[cpu]->shortname);
1467                         else
1468                                 printf(".  ");
1469                 } else
1470                         printf("   ");
1471         }
1472
1473         printf("  %12.6f secs ", (double)timestamp/1e9);
1474         if (new_shortname) {
1475                 printf("%s => %s:%d\n",
1476                         sched_in->shortname, sched_in->comm, sched_in->pid);
1477         } else {
1478                 printf("\n");
1479         }
1480 }
1481
1482 static void
1483 process_sched_switch_event(struct perf_tool *tool __used,
1484                            struct event_format *event,
1485                            struct perf_sample *sample,
1486                            struct machine *machine,
1487                            struct thread *thread)
1488 {
1489         int this_cpu = sample->cpu;
1490         void *data = sample->raw_data;
1491         struct trace_switch_event switch_event;
1492
1493         FILL_COMMON_FIELDS(switch_event, event, data);
1494
1495         FILL_ARRAY(switch_event, prev_comm, event, data);
1496         FILL_FIELD(switch_event, prev_pid, event, data);
1497         FILL_FIELD(switch_event, prev_prio, event, data);
1498         FILL_FIELD(switch_event, prev_state, event, data);
1499         FILL_ARRAY(switch_event, next_comm, event, data);
1500         FILL_FIELD(switch_event, next_pid, event, data);
1501         FILL_FIELD(switch_event, next_prio, event, data);
1502
1503         if (curr_pid[this_cpu] != (u32)-1) {
1504                 /*
1505                  * Are we trying to switch away a PID that is
1506                  * not current?
1507                  */
1508                 if (curr_pid[this_cpu] != switch_event.prev_pid)
1509                         nr_context_switch_bugs++;
1510         }
1511         if (trace_handler->switch_event)
1512                 trace_handler->switch_event(&switch_event, machine, event,
1513                                             this_cpu, sample->time, thread);
1514
1515         curr_pid[this_cpu] = switch_event.next_pid;
1516 }
1517
1518 static void
1519 process_sched_runtime_event(struct perf_tool *tool __used,
1520                             struct event_format *event,
1521                             struct perf_sample *sample,
1522                             struct machine *machine,
1523                             struct thread *thread)
1524 {
1525         void *data = sample->raw_data;
1526         struct trace_runtime_event runtime_event;
1527
1528         FILL_ARRAY(runtime_event, comm, event, data);
1529         FILL_FIELD(runtime_event, pid, event, data);
1530         FILL_FIELD(runtime_event, runtime, event, data);
1531         FILL_FIELD(runtime_event, vruntime, event, data);
1532
1533         if (trace_handler->runtime_event)
1534                 trace_handler->runtime_event(&runtime_event, machine, event,
1535                                              sample->cpu, sample->time, thread);
1536 }
1537
1538 static void
1539 process_sched_fork_event(struct perf_tool *tool __used,
1540                          struct event_format *event,
1541                          struct perf_sample *sample,
1542                          struct machine *machine __used,
1543                          struct thread *thread)
1544 {
1545         void *data = sample->raw_data;
1546         struct trace_fork_event fork_event;
1547
1548         FILL_COMMON_FIELDS(fork_event, event, data);
1549
1550         FILL_ARRAY(fork_event, parent_comm, event, data);
1551         FILL_FIELD(fork_event, parent_pid, event, data);
1552         FILL_ARRAY(fork_event, child_comm, event, data);
1553         FILL_FIELD(fork_event, child_pid, event, data);
1554
1555         if (trace_handler->fork_event)
1556                 trace_handler->fork_event(&fork_event, event,
1557                                           sample->cpu, sample->time, thread);
1558 }
1559
1560 static void
1561 process_sched_exit_event(struct perf_tool *tool __used,
1562                          struct event_format *event,
1563                          struct perf_sample *sample __used,
1564                          struct machine *machine __used,
1565                          struct thread *thread __used)
1566 {
1567         if (verbose)
1568                 printf("sched_exit event %p\n", event);
1569 }
1570
1571 static void
1572 process_sched_migrate_task_event(struct perf_tool *tool __used,
1573                                  struct event_format *event,
1574                                  struct perf_sample *sample,
1575                                  struct machine *machine,
1576                                  struct thread *thread)
1577 {
1578         void *data = sample->raw_data;
1579         struct trace_migrate_task_event migrate_task_event;
1580
1581         FILL_COMMON_FIELDS(migrate_task_event, event, data);
1582
1583         FILL_ARRAY(migrate_task_event, comm, event, data);
1584         FILL_FIELD(migrate_task_event, pid, event, data);
1585         FILL_FIELD(migrate_task_event, prio, event, data);
1586         FILL_FIELD(migrate_task_event, cpu, event, data);
1587
1588         if (trace_handler->migrate_task_event)
1589                 trace_handler->migrate_task_event(&migrate_task_event, machine,
1590                                                   event, sample->cpu,
1591                                                   sample->time, thread);
1592 }
1593
1594 typedef void (*tracepoint_handler)(struct perf_tool *tool, struct event_format *event,
1595                                    struct perf_sample *sample,
1596                                    struct machine *machine,
1597                                    struct thread *thread);
1598
1599 static int perf_sched__process_tracepoint_sample(struct perf_tool *tool,
1600                                                  union perf_event *event __used,
1601                                                  struct perf_sample *sample,
1602                                                  struct perf_evsel *evsel,
1603                                                  struct machine *machine)
1604 {
1605         struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1606         struct pevent *pevent = sched->session->pevent;
1607         struct thread *thread = machine__findnew_thread(machine, sample->pid);
1608
1609         if (thread == NULL) {
1610                 pr_debug("problem processing %s event, skipping it.\n",
1611                          perf_evsel__name(evsel));
1612                 return -1;
1613         }
1614
1615         evsel->hists.stats.total_period += sample->period;
1616         hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
1617
1618         if (evsel->handler.func != NULL) {
1619                 tracepoint_handler f = evsel->handler.func;
1620
1621                 if (evsel->handler.data == NULL)
1622                         evsel->handler.data = pevent_find_event(pevent,
1623                                                           evsel->attr.config);
1624
1625                 f(tool, evsel->handler.data, sample, machine, thread);
1626         }
1627
1628         return 0;
1629 }
1630
1631 static struct perf_sched perf_sched = {
1632         .tool = {
1633                 .sample          = perf_sched__process_tracepoint_sample,
1634                 .comm            = perf_event__process_comm,
1635                 .lost            = perf_event__process_lost,
1636                 .fork            = perf_event__process_task,
1637                 .ordered_samples = true,
1638         },
1639 };
1640
1641 static void read_events(bool destroy, struct perf_session **psession)
1642 {
1643         int err = -EINVAL;
1644         const struct perf_evsel_str_handler handlers[] = {
1645                 { "sched:sched_switch",       process_sched_switch_event, },
1646                 { "sched:sched_stat_runtime", process_sched_runtime_event, },
1647                 { "sched:sched_wakeup",       process_sched_wakeup_event, },
1648                 { "sched:sched_wakeup_new",   process_sched_wakeup_event, },
1649                 { "sched:sched_process_fork", process_sched_fork_event, },
1650                 { "sched:sched_process_exit", process_sched_exit_event, },
1651                 { "sched:sched_migrate_task", process_sched_migrate_task_event, },
1652         };
1653         struct perf_session *session;
1654
1655         session = perf_session__new(input_name, O_RDONLY, 0, false,
1656                                     &perf_sched.tool);
1657         if (session == NULL)
1658                 die("No Memory");
1659
1660         perf_sched.session = session;
1661
1662         err = perf_session__set_tracepoints_handlers(session, handlers);
1663         assert(err == 0);
1664
1665         if (perf_session__has_traces(session, "record -R")) {
1666                 err = perf_session__process_events(session, &perf_sched.tool);
1667                 if (err)
1668                         die("Failed to process events, error %d", err);
1669
1670                 nr_events      = session->hists.stats.nr_events[0];
1671                 nr_lost_events = session->hists.stats.total_lost;
1672                 nr_lost_chunks = session->hists.stats.nr_events[PERF_RECORD_LOST];
1673         }
1674
1675         if (destroy)
1676                 perf_session__delete(session);
1677
1678         if (psession)
1679                 *psession = session;
1680 }
1681
1682 static void print_bad_events(void)
1683 {
1684         if (nr_unordered_timestamps && nr_timestamps) {
1685                 printf("  INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
1686                         (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
1687                         nr_unordered_timestamps, nr_timestamps);
1688         }
1689         if (nr_lost_events && nr_events) {
1690                 printf("  INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
1691                         (double)nr_lost_events/(double)nr_events*100.0,
1692                         nr_lost_events, nr_events, nr_lost_chunks);
1693         }
1694         if (nr_state_machine_bugs && nr_timestamps) {
1695                 printf("  INFO: %.3f%% state machine bugs (%ld out of %ld)",
1696                         (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
1697                         nr_state_machine_bugs, nr_timestamps);
1698                 if (nr_lost_events)
1699                         printf(" (due to lost events?)");
1700                 printf("\n");
1701         }
1702         if (nr_context_switch_bugs && nr_timestamps) {
1703                 printf("  INFO: %.3f%% context switch bugs (%ld out of %ld)",
1704                         (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
1705                         nr_context_switch_bugs, nr_timestamps);
1706                 if (nr_lost_events)
1707                         printf(" (due to lost events?)");
1708                 printf("\n");
1709         }
1710 }
1711
1712 static void __cmd_lat(void)
1713 {
1714         struct rb_node *next;
1715         struct perf_session *session;
1716
1717         setup_pager();
1718         read_events(false, &session);
1719         sort_lat();
1720
1721         printf("\n ---------------------------------------------------------------------------------------------------------------\n");
1722         printf("  Task                  |   Runtime ms  | Switches | Average delay ms | Maximum delay ms | Maximum delay at     |\n");
1723         printf(" ---------------------------------------------------------------------------------------------------------------\n");
1724
1725         next = rb_first(&sorted_atom_root);
1726
1727         while (next) {
1728                 struct work_atoms *work_list;
1729
1730                 work_list = rb_entry(next, struct work_atoms, node);
1731                 output_lat_thread(work_list);
1732                 next = rb_next(next);
1733         }
1734
1735         printf(" -----------------------------------------------------------------------------------------\n");
1736         printf("  TOTAL:                |%11.3f ms |%9" PRIu64 " |\n",
1737                 (double)all_runtime/1e6, all_count);
1738
1739         printf(" ---------------------------------------------------\n");
1740
1741         print_bad_events();
1742         printf("\n");
1743
1744         perf_session__delete(session);
1745 }
1746
1747 static struct trace_sched_handler map_ops  = {
1748         .wakeup_event           = NULL,
1749         .switch_event           = map_switch_event,
1750         .runtime_event          = NULL,
1751         .fork_event             = NULL,
1752 };
1753
1754 static void __cmd_map(void)
1755 {
1756         max_cpu = sysconf(_SC_NPROCESSORS_CONF);
1757
1758         setup_pager();
1759         read_events(true, NULL);
1760         print_bad_events();
1761 }
1762
1763 static void __cmd_replay(void)
1764 {
1765         unsigned long i;
1766
1767         calibrate_run_measurement_overhead();
1768         calibrate_sleep_measurement_overhead();
1769
1770         test_calibrations();
1771
1772         read_events(true, NULL);
1773
1774         printf("nr_run_events:        %ld\n", nr_run_events);
1775         printf("nr_sleep_events:      %ld\n", nr_sleep_events);
1776         printf("nr_wakeup_events:     %ld\n", nr_wakeup_events);
1777
1778         if (targetless_wakeups)
1779                 printf("target-less wakeups:  %ld\n", targetless_wakeups);
1780         if (multitarget_wakeups)
1781                 printf("multi-target wakeups: %ld\n", multitarget_wakeups);
1782         if (nr_run_events_optimized)
1783                 printf("run atoms optimized: %ld\n",
1784                         nr_run_events_optimized);
1785
1786         print_task_traces();
1787         add_cross_task_wakeups();
1788
1789         create_tasks();
1790         printf("------------------------------------------------------------\n");
1791         for (i = 0; i < replay_repeat; i++)
1792                 run_one_test();
1793 }
1794
1795
1796 static const char * const sched_usage[] = {
1797         "perf sched [<options>] {record|latency|map|replay|script}",
1798         NULL
1799 };
1800
1801 static const struct option sched_options[] = {
1802         OPT_STRING('i', "input", &input_name, "file",
1803                     "input file name"),
1804         OPT_INCR('v', "verbose", &verbose,
1805                     "be more verbose (show symbol address, etc)"),
1806         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1807                     "dump raw trace in ASCII"),
1808         OPT_END()
1809 };
1810
1811 static const char * const latency_usage[] = {
1812         "perf sched latency [<options>]",
1813         NULL
1814 };
1815
1816 static const struct option latency_options[] = {
1817         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1818                    "sort by key(s): runtime, switch, avg, max"),
1819         OPT_INCR('v', "verbose", &verbose,
1820                     "be more verbose (show symbol address, etc)"),
1821         OPT_INTEGER('C', "CPU", &profile_cpu,
1822                     "CPU to profile on"),
1823         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1824                     "dump raw trace in ASCII"),
1825         OPT_END()
1826 };
1827
1828 static const char * const replay_usage[] = {
1829         "perf sched replay [<options>]",
1830         NULL
1831 };
1832
1833 static const struct option replay_options[] = {
1834         OPT_UINTEGER('r', "repeat", &replay_repeat,
1835                      "repeat the workload replay N times (-1: infinite)"),
1836         OPT_INCR('v', "verbose", &verbose,
1837                     "be more verbose (show symbol address, etc)"),
1838         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1839                     "dump raw trace in ASCII"),
1840         OPT_END()
1841 };
1842
1843 static void setup_sorting(void)
1844 {
1845         char *tmp, *tok, *str = strdup(sort_order);
1846
1847         for (tok = strtok_r(str, ", ", &tmp);
1848                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
1849                 if (sort_dimension__add(tok, &sort_list) < 0) {
1850                         error("Unknown --sort key: `%s'", tok);
1851                         usage_with_options(latency_usage, latency_options);
1852                 }
1853         }
1854
1855         free(str);
1856
1857         sort_dimension__add("pid", &cmp_pid);
1858 }
1859
1860 static const char *record_args[] = {
1861         "record",
1862         "-a",
1863         "-R",
1864         "-f",
1865         "-m", "1024",
1866         "-c", "1",
1867         "-e", "sched:sched_switch",
1868         "-e", "sched:sched_stat_wait",
1869         "-e", "sched:sched_stat_sleep",
1870         "-e", "sched:sched_stat_iowait",
1871         "-e", "sched:sched_stat_runtime",
1872         "-e", "sched:sched_process_exit",
1873         "-e", "sched:sched_process_fork",
1874         "-e", "sched:sched_wakeup",
1875         "-e", "sched:sched_migrate_task",
1876 };
1877
1878 static int __cmd_record(int argc, const char **argv)
1879 {
1880         unsigned int rec_argc, i, j;
1881         const char **rec_argv;
1882
1883         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1884         rec_argv = calloc(rec_argc + 1, sizeof(char *));
1885
1886         if (rec_argv == NULL)
1887                 return -ENOMEM;
1888
1889         for (i = 0; i < ARRAY_SIZE(record_args); i++)
1890                 rec_argv[i] = strdup(record_args[i]);
1891
1892         for (j = 1; j < (unsigned int)argc; j++, i++)
1893                 rec_argv[i] = argv[j];
1894
1895         BUG_ON(i != rec_argc);
1896
1897         return cmd_record(i, rec_argv, NULL);
1898 }
1899
1900 int cmd_sched(int argc, const char **argv, const char *prefix __used)
1901 {
1902         argc = parse_options(argc, argv, sched_options, sched_usage,
1903                              PARSE_OPT_STOP_AT_NON_OPTION);
1904         if (!argc)
1905                 usage_with_options(sched_usage, sched_options);
1906
1907         /*
1908          * Aliased to 'perf script' for now:
1909          */
1910         if (!strcmp(argv[0], "script"))
1911                 return cmd_script(argc, argv, prefix);
1912
1913         symbol__init();
1914         if (!strncmp(argv[0], "rec", 3)) {
1915                 return __cmd_record(argc, argv);
1916         } else if (!strncmp(argv[0], "lat", 3)) {
1917                 trace_handler = &lat_ops;
1918                 if (argc > 1) {
1919                         argc = parse_options(argc, argv, latency_options, latency_usage, 0);
1920                         if (argc)
1921                                 usage_with_options(latency_usage, latency_options);
1922                 }
1923                 setup_sorting();
1924                 __cmd_lat();
1925         } else if (!strcmp(argv[0], "map")) {
1926                 trace_handler = &map_ops;
1927                 setup_sorting();
1928                 __cmd_map();
1929         } else if (!strncmp(argv[0], "rep", 3)) {
1930                 trace_handler = &replay_ops;
1931                 if (argc) {
1932                         argc = parse_options(argc, argv, replay_options, replay_usage, 0);
1933                         if (argc)
1934                                 usage_with_options(replay_usage, replay_options);
1935                 }
1936                 __cmd_replay();
1937         } else {
1938                 usage_with_options(sched_usage, sched_options);
1939         }
1940
1941         return 0;
1942 }