5 #include "util/cache.h"
6 #include "util/symbol.h"
7 #include "util/thread.h"
8 #include "util/header.h"
10 #include "util/parse-options.h"
11 #include "util/trace-event.h"
13 #include "util/debug.h"
15 #include <sys/types.h>
16 #include <sys/prctl.h>
18 #include <semaphore.h>
22 static char const *input_name = "perf.data";
24 static unsigned long page_size;
25 static unsigned long mmap_window = 32;
27 static unsigned long total_comm = 0;
29 static struct rb_root threads;
30 static struct thread *last_match;
32 static struct perf_header *header;
33 static u64 sample_type;
35 static char default_sort_order[] = "avg, max, switch, runtime";
36 static char *sort_order = default_sort_order;
38 #define PR_SET_NAME 15 /* Set process name */
41 #define BUG_ON(x) assert(!(x))
43 static u64 run_measurement_overhead;
44 static u64 sleep_measurement_overhead;
51 static unsigned long nr_tasks;
60 unsigned long nr_events;
61 unsigned long curr_event;
62 struct sched_event **events;
73 enum sched_event_type {
80 enum sched_event_type type;
86 struct task_desc *wakee;
89 static struct task_desc *pid_to_task[MAX_PID];
91 static struct task_desc **tasks;
93 static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
94 static u64 start_time;
96 static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
98 static unsigned long nr_run_events;
99 static unsigned long nr_sleep_events;
100 static unsigned long nr_wakeup_events;
102 static unsigned long nr_sleep_corrections;
103 static unsigned long nr_run_events_optimized;
105 static unsigned long targetless_wakeups;
106 static unsigned long multitarget_wakeups;
108 static u64 cpu_usage;
109 static u64 runavg_cpu_usage;
110 static u64 parent_cpu_usage;
111 static u64 runavg_parent_cpu_usage;
113 static unsigned long nr_runs;
114 static u64 sum_runtime;
115 static u64 sum_fluct;
118 static unsigned long replay_repeat = 10;
120 #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
130 struct list_head list;
131 enum thread_state state;
139 struct list_head atom_list;
140 struct thread *thread;
148 typedef int (*sort_fn_t)(struct task_atoms *, struct task_atoms *);
150 static struct rb_root atom_root, sorted_atom_root;
152 static u64 all_runtime;
153 static u64 all_count;
155 static int read_events(void);
158 static u64 get_nsecs(void)
162 clock_gettime(CLOCK_MONOTONIC, &ts);
164 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
167 static void burn_nsecs(u64 nsecs)
169 u64 T0 = get_nsecs(), T1;
173 } while (T1 + run_measurement_overhead < T0 + nsecs);
176 static void sleep_nsecs(u64 nsecs)
180 ts.tv_nsec = nsecs % 999999999;
181 ts.tv_sec = nsecs / 999999999;
183 nanosleep(&ts, NULL);
186 static void calibrate_run_measurement_overhead(void)
188 u64 T0, T1, delta, min_delta = 1000000000ULL;
191 for (i = 0; i < 10; i++) {
196 min_delta = min(min_delta, delta);
198 run_measurement_overhead = min_delta;
200 printf("run measurement overhead: %Ld nsecs\n", min_delta);
203 static void calibrate_sleep_measurement_overhead(void)
205 u64 T0, T1, delta, min_delta = 1000000000ULL;
208 for (i = 0; i < 10; i++) {
213 min_delta = min(min_delta, delta);
216 sleep_measurement_overhead = min_delta;
218 printf("sleep measurement overhead: %Ld nsecs\n", min_delta);
221 static struct sched_event *
222 get_new_event(struct task_desc *task, u64 timestamp)
224 struct sched_event *event = calloc(1, sizeof(*event));
225 unsigned long idx = task->nr_events;
228 event->timestamp = timestamp;
232 size = sizeof(struct sched_event *) * task->nr_events;
233 task->events = realloc(task->events, size);
234 BUG_ON(!task->events);
236 task->events[idx] = event;
241 static struct sched_event *last_event(struct task_desc *task)
243 if (!task->nr_events)
246 return task->events[task->nr_events - 1];
250 add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
252 struct sched_event *event, *curr_event = last_event(task);
255 * optimize an existing RUN event by merging this one
258 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
259 nr_run_events_optimized++;
260 curr_event->duration += duration;
264 event = get_new_event(task, timestamp);
266 event->type = SCHED_EVENT_RUN;
267 event->duration = duration;
273 add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
274 struct task_desc *wakee)
276 struct sched_event *event, *wakee_event;
278 event = get_new_event(task, timestamp);
279 event->type = SCHED_EVENT_WAKEUP;
280 event->wakee = wakee;
282 wakee_event = last_event(wakee);
283 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
284 targetless_wakeups++;
287 if (wakee_event->wait_sem) {
288 multitarget_wakeups++;
292 wakee_event->wait_sem = calloc(1, sizeof(*wakee_event->wait_sem));
293 sem_init(wakee_event->wait_sem, 0, 0);
294 wakee_event->specific_wait = 1;
295 event->wait_sem = wakee_event->wait_sem;
301 add_sched_event_sleep(struct task_desc *task, u64 timestamp,
302 u64 task_state __used)
304 struct sched_event *event = get_new_event(task, timestamp);
306 event->type = SCHED_EVENT_SLEEP;
311 static struct task_desc *register_pid(unsigned long pid, const char *comm)
313 struct task_desc *task;
315 BUG_ON(pid >= MAX_PID);
317 task = pid_to_task[pid];
322 task = calloc(1, sizeof(*task));
325 strcpy(task->comm, comm);
327 * every task starts in sleeping state - this gets ignored
328 * if there's no wakeup pointing to this sleep state:
330 add_sched_event_sleep(task, 0, 0);
332 pid_to_task[pid] = task;
334 tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
336 tasks[task->nr] = task;
339 printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
345 static void print_task_traces(void)
347 struct task_desc *task;
350 for (i = 0; i < nr_tasks; i++) {
352 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
353 task->nr, task->comm, task->pid, task->nr_events);
357 static void add_cross_task_wakeups(void)
359 struct task_desc *task1, *task2;
362 for (i = 0; i < nr_tasks; i++) {
368 add_sched_event_wakeup(task1, 0, task2);
373 process_sched_event(struct task_desc *this_task __used, struct sched_event *event)
380 delta = start_time + event->timestamp - now;
382 switch (event->type) {
383 case SCHED_EVENT_RUN:
384 burn_nsecs(event->duration);
386 case SCHED_EVENT_SLEEP:
388 ret = sem_wait(event->wait_sem);
391 case SCHED_EVENT_WAKEUP:
393 ret = sem_post(event->wait_sem);
401 static u64 get_cpu_usage_nsec_parent(void)
407 err = getrusage(RUSAGE_SELF, &ru);
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;
416 static u64 get_cpu_usage_nsec_self(void)
418 char filename [] = "/proc/1234567890/sched";
419 unsigned long msecs, nsecs;
427 sprintf(filename, "/proc/%d/sched", getpid());
428 file = fopen(filename, "r");
431 while ((chars = getline(&line, &len, file)) != -1) {
432 ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n",
435 total = msecs*1e6 + nsecs;
446 static void *thread_func(void *ctx)
448 struct task_desc *this_task = ctx;
449 u64 cpu_usage_0, cpu_usage_1;
450 unsigned long i, ret;
453 sprintf(comm2, ":%s", this_task->comm);
454 prctl(PR_SET_NAME, comm2);
457 ret = sem_post(&this_task->ready_for_work);
459 ret = pthread_mutex_lock(&start_work_mutex);
461 ret = pthread_mutex_unlock(&start_work_mutex);
464 cpu_usage_0 = get_cpu_usage_nsec_self();
466 for (i = 0; i < this_task->nr_events; i++) {
467 this_task->curr_event = i;
468 process_sched_event(this_task, this_task->events[i]);
471 cpu_usage_1 = get_cpu_usage_nsec_self();
472 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
474 ret = sem_post(&this_task->work_done_sem);
477 ret = pthread_mutex_lock(&work_done_wait_mutex);
479 ret = pthread_mutex_unlock(&work_done_wait_mutex);
485 static void create_tasks(void)
487 struct task_desc *task;
492 err = pthread_attr_init(&attr);
494 err = pthread_attr_setstacksize(&attr, (size_t)(16*1024));
496 err = pthread_mutex_lock(&start_work_mutex);
498 err = pthread_mutex_lock(&work_done_wait_mutex);
500 for (i = 0; i < nr_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);
511 static void wait_for_tasks(void)
513 u64 cpu_usage_0, cpu_usage_1;
514 struct task_desc *task;
515 unsigned long i, ret;
517 start_time = get_nsecs();
519 pthread_mutex_unlock(&work_done_wait_mutex);
521 for (i = 0; i < nr_tasks; i++) {
523 ret = sem_wait(&task->ready_for_work);
525 sem_init(&task->ready_for_work, 0, 0);
527 ret = pthread_mutex_lock(&work_done_wait_mutex);
530 cpu_usage_0 = get_cpu_usage_nsec_parent();
532 pthread_mutex_unlock(&start_work_mutex);
534 for (i = 0; i < nr_tasks; i++) {
536 ret = sem_wait(&task->work_done_sem);
538 sem_init(&task->work_done_sem, 0, 0);
539 cpu_usage += task->cpu_usage;
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;
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;
554 ret = pthread_mutex_lock(&start_work_mutex);
557 for (i = 0; i < nr_tasks; i++) {
559 sem_init(&task->sleep_sem, 0, 0);
560 task->curr_event = 0;
564 static void run_one_test(void)
566 u64 T0, T1, delta, avg_delta, fluct, std_dev;
573 sum_runtime += delta;
576 avg_delta = sum_runtime / nr_runs;
577 if (delta < avg_delta)
578 fluct = avg_delta - delta;
580 fluct = delta - avg_delta;
582 std_dev = sum_fluct / nr_runs / sqrt(nr_runs);
585 run_avg = (run_avg*9 + delta)/10;
587 printf("#%-3ld: %0.3f, ",
588 nr_runs, (double)delta/1000000.0);
590 printf("ravg: %0.2f, ",
591 (double)run_avg/1e6);
593 printf("cpu: %0.2f / %0.2f",
594 (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
598 * rusage statistics done by the parent, these are less
599 * accurate than the sum_exec_runtime based statistics:
601 printf(" [%0.2f / %0.2f]",
602 (double)parent_cpu_usage/1e6,
603 (double)runavg_parent_cpu_usage/1e6);
608 if (nr_sleep_corrections)
609 printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
610 nr_sleep_corrections = 0;
613 static void test_calibrations(void)
621 printf("the run test took %Ld nsecs\n", T1-T0);
627 printf("the sleep test took %Ld nsecs\n", T1-T0);
630 static void __cmd_replay(void)
634 calibrate_run_measurement_overhead();
635 calibrate_sleep_measurement_overhead();
641 printf("nr_run_events: %ld\n", nr_run_events);
642 printf("nr_sleep_events: %ld\n", nr_sleep_events);
643 printf("nr_wakeup_events: %ld\n", nr_wakeup_events);
645 if (targetless_wakeups)
646 printf("target-less wakeups: %ld\n", targetless_wakeups);
647 if (multitarget_wakeups)
648 printf("multi-target wakeups: %ld\n", multitarget_wakeups);
649 if (nr_run_events_optimized)
650 printf("run events optimized: %ld\n",
651 nr_run_events_optimized);
654 add_cross_task_wakeups();
657 printf("------------------------------------------------------------\n");
658 for (i = 0; i < replay_repeat; i++)
663 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
665 struct thread *thread;
667 thread = threads__findnew(event->comm.pid, &threads, &last_match);
669 dump_printf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
670 (void *)(offset + head),
671 (void *)(long)(event->header.size),
672 event->comm.comm, event->comm.pid);
674 if (thread == NULL ||
675 thread__set_comm(thread, event->comm.comm)) {
676 dump_printf("problem processing PERF_EVENT_COMM, skipping event.\n");
685 struct raw_event_sample {
690 #define FILL_FIELD(ptr, field, event, data) \
691 ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
693 #define FILL_ARRAY(ptr, array, event, data) \
695 void *__array = raw_field_ptr(event, #array, data); \
696 memcpy(ptr.array, __array, sizeof(ptr.array)); \
699 #define FILL_COMMON_FIELDS(ptr, event, data) \
701 FILL_FIELD(ptr, common_type, event, data); \
702 FILL_FIELD(ptr, common_flags, event, data); \
703 FILL_FIELD(ptr, common_preempt_count, event, data); \
704 FILL_FIELD(ptr, common_pid, event, data); \
705 FILL_FIELD(ptr, common_tgid, event, data); \
710 struct trace_switch_event {
715 u8 common_preempt_count;
729 struct trace_wakeup_event {
734 u8 common_preempt_count;
746 struct trace_fork_event {
751 u8 common_preempt_count;
755 char parent_comm[16];
761 struct trace_sched_handler {
762 void (*switch_event)(struct trace_switch_event *,
766 struct thread *thread);
768 void (*wakeup_event)(struct trace_wakeup_event *,
772 struct thread *thread);
774 void (*fork_event)(struct trace_fork_event *,
778 struct thread *thread);
783 replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
786 u64 timestamp __used,
787 struct thread *thread __used)
789 struct task_desc *waker, *wakee;
792 printf("sched_wakeup event %p\n", event);
794 printf(" ... pid %d woke up %s/%d\n",
795 wakeup_event->common_pid,
800 waker = register_pid(wakeup_event->common_pid, "<unknown>");
801 wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
803 add_sched_event_wakeup(waker, timestamp, wakee);
806 static unsigned long cpu_last_switched[MAX_CPUS];
809 replay_switch_event(struct trace_switch_event *switch_event,
813 struct thread *thread __used)
815 struct task_desc *prev, *next;
820 printf("sched_switch event %p\n", event);
822 if (cpu >= MAX_CPUS || cpu < 0)
825 timestamp0 = cpu_last_switched[cpu];
827 delta = timestamp - timestamp0;
832 die("hm, delta: %Ld < 0 ?\n", delta);
835 printf(" ... switch from %s/%d to %s/%d [ran %Ld nsecs]\n",
836 switch_event->prev_comm, switch_event->prev_pid,
837 switch_event->next_comm, switch_event->next_pid,
841 prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
842 next = register_pid(switch_event->next_pid, switch_event->next_comm);
844 cpu_last_switched[cpu] = timestamp;
846 add_sched_event_run(prev, timestamp, delta);
847 add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
852 replay_fork_event(struct trace_fork_event *fork_event,
855 u64 timestamp __used,
856 struct thread *thread __used)
859 printf("sched_fork event %p\n", event);
860 printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
861 printf("... child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
863 register_pid(fork_event->parent_pid, fork_event->parent_comm);
864 register_pid(fork_event->child_pid, fork_event->child_comm);
867 static struct trace_sched_handler replay_ops = {
868 .wakeup_event = replay_wakeup_event,
869 .switch_event = replay_switch_event,
870 .fork_event = replay_fork_event,
873 struct sort_dimension {
876 struct list_head list;
879 static LIST_HEAD(cmp_pid);
882 thread_lat_cmp(struct list_head *list, struct task_atoms *l, struct task_atoms *r)
884 struct sort_dimension *sort;
887 BUG_ON(list_empty(list));
889 list_for_each_entry(sort, list, list) {
890 ret = sort->cmp(l, r);
898 static struct task_atoms *
899 thread_atoms_search(struct rb_root *root, struct thread *thread,
900 struct list_head *sort_list)
902 struct rb_node *node = root->rb_node;
903 struct task_atoms key = { .thread = thread };
906 struct task_atoms *atoms;
909 atoms = container_of(node, struct task_atoms, node);
911 cmp = thread_lat_cmp(sort_list, &key, atoms);
913 node = node->rb_left;
915 node = node->rb_right;
917 BUG_ON(thread != atoms->thread);
925 __thread_latency_insert(struct rb_root *root, struct task_atoms *data,
926 struct list_head *sort_list)
928 struct rb_node **new = &(root->rb_node), *parent = NULL;
931 struct task_atoms *this;
934 this = container_of(*new, struct task_atoms, node);
937 cmp = thread_lat_cmp(sort_list, data, this);
940 new = &((*new)->rb_left);
942 new = &((*new)->rb_right);
945 rb_link_node(&data->node, parent, new);
946 rb_insert_color(&data->node, root);
949 static void thread_atoms_insert(struct thread *thread)
951 struct task_atoms *atoms;
953 atoms = calloc(sizeof(*atoms), 1);
957 atoms->thread = thread;
958 INIT_LIST_HEAD(&atoms->atom_list);
959 __thread_latency_insert(&atom_root, atoms, &cmp_pid);
963 latency_fork_event(struct trace_fork_event *fork_event __used,
964 struct event *event __used,
966 u64 timestamp __used,
967 struct thread *thread __used)
969 /* should insert the newcomer */
973 static char sched_out_state(struct trace_switch_event *switch_event)
975 const char *str = TASK_STATE_TO_CHAR_STR;
977 return str[switch_event->prev_state];
981 lat_sched_out(struct task_atoms *atoms,
982 struct trace_switch_event *switch_event __used,
986 struct work_atom *atom;
988 atom = calloc(sizeof(*atom), 1);
992 atom->sched_out_time = timestamp;
994 if (sched_out_state(switch_event) == 'R') {
995 atom->state = THREAD_WAIT_CPU;
996 atom->wake_up_time = atom->sched_out_time;
999 atom->runtime = delta;
1000 list_add_tail(&atom->list, &atoms->atom_list);
1004 lat_sched_in(struct task_atoms *atoms, u64 timestamp)
1006 struct work_atom *atom;
1009 if (list_empty(&atoms->atom_list))
1012 atom = list_entry(atoms->atom_list.prev, struct work_atom, list);
1014 if (atom->state != THREAD_WAIT_CPU)
1017 if (timestamp < atom->wake_up_time) {
1018 atom->state = THREAD_IGNORE;
1022 atom->state = THREAD_SCHED_IN;
1023 atom->sched_in_time = timestamp;
1025 delta = atom->sched_in_time - atom->wake_up_time;
1026 atoms->total_lat += delta;
1027 if (delta > atoms->max_lat)
1028 atoms->max_lat = delta;
1030 atoms->total_runtime += atom->runtime;
1034 latency_switch_event(struct trace_switch_event *switch_event,
1035 struct event *event __used,
1038 struct thread *thread __used)
1040 struct task_atoms *out_atoms, *in_atoms;
1041 struct thread *sched_out, *sched_in;
1045 if (cpu >= MAX_CPUS || cpu < 0)
1048 timestamp0 = cpu_last_switched[cpu];
1049 cpu_last_switched[cpu] = timestamp;
1051 delta = timestamp - timestamp0;
1056 die("hm, delta: %Ld < 0 ?\n", delta);
1059 sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
1060 sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
1062 in_atoms = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1064 thread_atoms_insert(sched_in);
1065 in_atoms = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1067 die("in-atom: Internal tree error");
1070 out_atoms = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1072 thread_atoms_insert(sched_out);
1073 out_atoms = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1075 die("out-atom: Internal tree error");
1078 lat_sched_in(in_atoms, timestamp);
1079 lat_sched_out(out_atoms, switch_event, delta, timestamp);
1083 latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
1084 struct event *event __used,
1087 struct thread *thread __used)
1089 struct task_atoms *atoms;
1090 struct work_atom *atom;
1091 struct thread *wakee;
1093 /* Note for later, it may be interesting to observe the failing cases */
1094 if (!wakeup_event->success)
1097 wakee = threads__findnew(wakeup_event->pid, &threads, &last_match);
1098 atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1100 thread_atoms_insert(wakee);
1104 if (list_empty(&atoms->atom_list))
1107 atom = list_entry(atoms->atom_list.prev, struct work_atom, list);
1109 if (atom->state != THREAD_SLEEPING)
1112 if (atom->sched_out_time > timestamp)
1115 atom->state = THREAD_WAIT_CPU;
1116 atom->wake_up_time = timestamp;
1119 static struct trace_sched_handler lat_ops = {
1120 .wakeup_event = latency_wakeup_event,
1121 .switch_event = latency_switch_event,
1122 .fork_event = latency_fork_event,
1125 static void output_lat_thread(struct task_atoms *atom_list)
1131 if (!atom_list->nb_atoms)
1134 all_runtime += atom_list->total_runtime;
1135 all_count += atom_list->nb_atoms;
1137 ret = printf(" %s ", atom_list->thread->comm);
1139 for (i = 0; i < 19 - ret; i++)
1142 avg = atom_list->total_lat / atom_list->nb_atoms;
1144 printf("|%9.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms |\n",
1145 (double)atom_list->total_runtime / 1e6,
1146 atom_list->nb_atoms, (double)avg / 1e6,
1147 (double)atom_list->max_lat / 1e6);
1150 static int pid_cmp(struct task_atoms *l, struct task_atoms *r)
1152 if (l->thread->pid < r->thread->pid)
1154 if (l->thread->pid > r->thread->pid)
1160 static struct sort_dimension pid_sort_dimension = {
1165 static int avg_cmp(struct task_atoms *l, struct task_atoms *r)
1175 avgl = l->total_lat / l->nb_atoms;
1176 avgr = r->total_lat / r->nb_atoms;
1186 static struct sort_dimension avg_sort_dimension = {
1191 static int max_cmp(struct task_atoms *l, struct task_atoms *r)
1193 if (l->max_lat < r->max_lat)
1195 if (l->max_lat > r->max_lat)
1201 static struct sort_dimension max_sort_dimension = {
1206 static int switch_cmp(struct task_atoms *l, struct task_atoms *r)
1208 if (l->nb_atoms < r->nb_atoms)
1210 if (l->nb_atoms > r->nb_atoms)
1216 static struct sort_dimension switch_sort_dimension = {
1221 static int runtime_cmp(struct task_atoms *l, struct task_atoms *r)
1223 if (l->total_runtime < r->total_runtime)
1225 if (l->total_runtime > r->total_runtime)
1231 static struct sort_dimension runtime_sort_dimension = {
1236 static struct sort_dimension *available_sorts[] = {
1237 &pid_sort_dimension,
1238 &avg_sort_dimension,
1239 &max_sort_dimension,
1240 &switch_sort_dimension,
1241 &runtime_sort_dimension,
1244 #define NB_AVAILABLE_SORTS (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
1246 static LIST_HEAD(sort_list);
1248 static int sort_dimension__add(char *tok, struct list_head *list)
1252 for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
1253 if (!strcmp(available_sorts[i]->name, tok)) {
1254 list_add_tail(&available_sorts[i]->list, list);
1263 static void setup_sorting(void);
1265 static void sort_lat(void)
1267 struct rb_node *node;
1270 struct task_atoms *data;
1271 node = rb_first(&atom_root);
1275 rb_erase(node, &atom_root);
1276 data = rb_entry(node, struct task_atoms, node);
1277 __thread_latency_insert(&sorted_atom_root, data, &sort_list);
1281 static void __cmd_lat(void)
1283 struct rb_node *next;
1289 printf("-----------------------------------------------------------------------------------\n");
1290 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n");
1291 printf("-----------------------------------------------------------------------------------\n");
1293 next = rb_first(&sorted_atom_root);
1296 struct task_atoms *atom_list;
1298 atom_list = rb_entry(next, struct task_atoms, node);
1299 output_lat_thread(atom_list);
1300 next = rb_next(next);
1303 printf("-----------------------------------------------------------------------------------\n");
1304 printf(" TOTAL: |%9.3f ms |%9Ld |\n",
1305 (double)all_runtime/1e6, all_count);
1306 printf("---------------------------------------------\n");
1309 static struct trace_sched_handler *trace_handler;
1312 process_sched_wakeup_event(struct raw_event_sample *raw,
1313 struct event *event,
1315 u64 timestamp __used,
1316 struct thread *thread __used)
1318 struct trace_wakeup_event wakeup_event;
1320 FILL_COMMON_FIELDS(wakeup_event, event, raw->data);
1322 FILL_ARRAY(wakeup_event, comm, event, raw->data);
1323 FILL_FIELD(wakeup_event, pid, event, raw->data);
1324 FILL_FIELD(wakeup_event, prio, event, raw->data);
1325 FILL_FIELD(wakeup_event, success, event, raw->data);
1326 FILL_FIELD(wakeup_event, cpu, event, raw->data);
1328 trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
1332 process_sched_switch_event(struct raw_event_sample *raw,
1333 struct event *event,
1335 u64 timestamp __used,
1336 struct thread *thread __used)
1338 struct trace_switch_event switch_event;
1340 FILL_COMMON_FIELDS(switch_event, event, raw->data);
1342 FILL_ARRAY(switch_event, prev_comm, event, raw->data);
1343 FILL_FIELD(switch_event, prev_pid, event, raw->data);
1344 FILL_FIELD(switch_event, prev_prio, event, raw->data);
1345 FILL_FIELD(switch_event, prev_state, event, raw->data);
1346 FILL_ARRAY(switch_event, next_comm, event, raw->data);
1347 FILL_FIELD(switch_event, next_pid, event, raw->data);
1348 FILL_FIELD(switch_event, next_prio, event, raw->data);
1350 trace_handler->switch_event(&switch_event, event, cpu, timestamp, thread);
1354 process_sched_fork_event(struct raw_event_sample *raw,
1355 struct event *event,
1357 u64 timestamp __used,
1358 struct thread *thread __used)
1360 struct trace_fork_event fork_event;
1362 FILL_COMMON_FIELDS(fork_event, event, raw->data);
1364 FILL_ARRAY(fork_event, parent_comm, event, raw->data);
1365 FILL_FIELD(fork_event, parent_pid, event, raw->data);
1366 FILL_ARRAY(fork_event, child_comm, event, raw->data);
1367 FILL_FIELD(fork_event, child_pid, event, raw->data);
1369 trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
1373 process_sched_exit_event(struct event *event,
1375 u64 timestamp __used,
1376 struct thread *thread __used)
1379 printf("sched_exit event %p\n", event);
1383 process_raw_event(event_t *raw_event __used, void *more_data,
1384 int cpu, u64 timestamp, struct thread *thread)
1386 struct raw_event_sample *raw = more_data;
1387 struct event *event;
1390 type = trace_parse_common_type(raw->data);
1391 event = trace_find_event(type);
1393 if (!strcmp(event->name, "sched_switch"))
1394 process_sched_switch_event(raw, event, cpu, timestamp, thread);
1395 if (!strcmp(event->name, "sched_wakeup"))
1396 process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
1397 if (!strcmp(event->name, "sched_wakeup_new"))
1398 process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
1399 if (!strcmp(event->name, "sched_process_fork"))
1400 process_sched_fork_event(raw, event, cpu, timestamp, thread);
1401 if (!strcmp(event->name, "sched_process_exit"))
1402 process_sched_exit_event(event, cpu, timestamp, thread);
1406 process_sample_event(event_t *event, unsigned long offset, unsigned long head)
1410 struct dso *dso = NULL;
1411 struct thread *thread;
1412 u64 ip = event->ip.ip;
1416 void *more_data = event->ip.__more_data;
1419 thread = threads__findnew(event->ip.pid, &threads, &last_match);
1421 if (sample_type & PERF_SAMPLE_TIME) {
1422 timestamp = *(u64 *)more_data;
1423 more_data += sizeof(u64);
1426 if (sample_type & PERF_SAMPLE_CPU) {
1427 cpu = *(u32 *)more_data;
1428 more_data += sizeof(u32);
1429 more_data += sizeof(u32); /* reserved */
1432 if (sample_type & PERF_SAMPLE_PERIOD) {
1433 period = *(u64 *)more_data;
1434 more_data += sizeof(u64);
1437 dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
1438 (void *)(offset + head),
1439 (void *)(long)(event->header.size),
1441 event->ip.pid, event->ip.tid,
1445 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
1447 if (thread == NULL) {
1448 eprintf("problem processing %d event, skipping it.\n",
1449 event->header.type);
1453 cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;
1455 if (cpumode == PERF_EVENT_MISC_KERNEL) {
1461 dump_printf(" ...... dso: %s\n", dso->name);
1463 } else if (cpumode == PERF_EVENT_MISC_USER) {
1472 dso = hypervisor_dso;
1474 dump_printf(" ...... dso: [hypervisor]\n");
1477 if (sample_type & PERF_SAMPLE_RAW)
1478 process_raw_event(event, more_data, cpu, timestamp, thread);
1484 process_event(event_t *event, unsigned long offset, unsigned long head)
1488 switch (event->header.type) {
1489 case PERF_EVENT_MMAP ... PERF_EVENT_LOST:
1492 case PERF_EVENT_COMM:
1493 return process_comm_event(event, offset, head);
1495 case PERF_EVENT_EXIT ... PERF_EVENT_READ:
1498 case PERF_EVENT_SAMPLE:
1499 return process_sample_event(event, offset, head);
1501 case PERF_EVENT_MAX:
1509 static int read_events(void)
1511 int ret, rc = EXIT_FAILURE;
1512 unsigned long offset = 0;
1513 unsigned long head = 0;
1514 struct stat perf_stat;
1520 register_idle_thread(&threads, &last_match);
1522 input = open(input_name, O_RDONLY);
1524 perror("failed to open file");
1528 ret = fstat(input, &perf_stat);
1530 perror("failed to stat file");
1534 if (!perf_stat.st_size) {
1535 fprintf(stderr, "zero-sized file, nothing to do!\n");
1538 header = perf_header__read(input);
1539 head = header->data_offset;
1540 sample_type = perf_header__sample_type(header);
1542 if (!(sample_type & PERF_SAMPLE_RAW))
1543 die("No trace sample to read. Did you call perf record "
1546 if (load_kernel() < 0) {
1547 perror("failed to load kernel symbols");
1548 return EXIT_FAILURE;
1552 buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
1553 MAP_SHARED, input, offset);
1554 if (buf == MAP_FAILED) {
1555 perror("failed to mmap file");
1560 event = (event_t *)(buf + head);
1562 size = event->header.size;
1566 if (head + event->header.size >= page_size * mmap_window) {
1567 unsigned long shift = page_size * (head / page_size);
1570 res = munmap(buf, page_size * mmap_window);
1578 size = event->header.size;
1581 if (!size || process_event(event, offset, head) < 0) {
1584 * assume we lost track of the stream, check alignment, and
1585 * increment a single u64 in the hope to catch on again 'soon'.
1588 if (unlikely(head & 7))
1596 if (offset + head < (unsigned long)perf_stat.st_size)
1605 static const char * const sched_usage[] = {
1606 "perf sched [<options>] {record|latency|replay|trace}",
1610 static const struct option sched_options[] = {
1611 OPT_BOOLEAN('v', "verbose", &verbose,
1612 "be more verbose (show symbol address, etc)"),
1613 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1614 "dump raw trace in ASCII"),
1618 static const char * const latency_usage[] = {
1619 "perf sched latency [<options>]",
1623 static const struct option latency_options[] = {
1624 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1625 "sort by key(s): runtime, switch, avg, max"),
1626 OPT_BOOLEAN('v', "verbose", &verbose,
1627 "be more verbose (show symbol address, etc)"),
1628 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1629 "dump raw trace in ASCII"),
1633 static const char * const replay_usage[] = {
1634 "perf sched replay [<options>]",
1638 static const struct option replay_options[] = {
1639 OPT_INTEGER('r', "repeat", &replay_repeat,
1640 "repeat the workload replay N times (-1: infinite)"),
1641 OPT_BOOLEAN('v', "verbose", &verbose,
1642 "be more verbose (show symbol address, etc)"),
1643 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1644 "dump raw trace in ASCII"),
1648 static void setup_sorting(void)
1650 char *tmp, *tok, *str = strdup(sort_order);
1652 for (tok = strtok_r(str, ", ", &tmp);
1653 tok; tok = strtok_r(NULL, ", ", &tmp)) {
1654 if (sort_dimension__add(tok, &sort_list) < 0) {
1655 error("Unknown --sort key: `%s'", tok);
1656 usage_with_options(latency_usage, latency_options);
1662 sort_dimension__add((char *)"pid", &cmp_pid);
1665 static const char *record_args[] = {
1672 "-e", "sched:sched_switch:r",
1673 "-e", "sched:sched_stat_wait:r",
1674 "-e", "sched:sched_stat_sleep:r",
1675 "-e", "sched:sched_stat_iowait:r",
1676 "-e", "sched:sched_process_exit:r",
1677 "-e", "sched:sched_process_fork:r",
1678 "-e", "sched:sched_wakeup:r",
1679 "-e", "sched:sched_migrate_task:r",
1682 static int __cmd_record(int argc, const char **argv)
1684 unsigned int rec_argc, i, j;
1685 const char **rec_argv;
1687 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1688 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1690 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1691 rec_argv[i] = strdup(record_args[i]);
1693 for (j = 1; j < (unsigned int)argc; j++, i++)
1694 rec_argv[i] = argv[j];
1696 BUG_ON(i != rec_argc);
1698 return cmd_record(i, rec_argv, NULL);
1701 int cmd_sched(int argc, const char **argv, const char *prefix __used)
1704 page_size = getpagesize();
1706 argc = parse_options(argc, argv, sched_options, sched_usage,
1707 PARSE_OPT_STOP_AT_NON_OPTION);
1709 usage_with_options(sched_usage, sched_options);
1711 if (!strncmp(argv[0], "rec", 3)) {
1712 return __cmd_record(argc, argv);
1713 } else if (!strncmp(argv[0], "lat", 3)) {
1714 trace_handler = &lat_ops;
1716 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
1718 usage_with_options(latency_usage, latency_options);
1722 } else if (!strncmp(argv[0], "rep", 3)) {
1723 trace_handler = &replay_ops;
1725 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
1727 usage_with_options(replay_usage, replay_options);
1730 } else if (!strcmp(argv[0], "trace")) {
1732 * Aliased to 'perf trace' for now:
1734 return cmd_trace(argc, argv, prefix);
1736 usage_with_options(sched_usage, sched_options);