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 #include "util/cloexec.h"
14 #include "util/thread_map.h"
15 #include "util/color.h"
16 #include "util/stat.h"
17 #include "util/callchain.h"
18 #include "util/time-utils.h"
20 #include <subcmd/parse-options.h>
21 #include "util/trace-event.h"
23 #include "util/debug.h"
25 #include <linux/log2.h>
26 #include <sys/prctl.h>
27 #include <sys/resource.h>
29 #include <semaphore.h>
32 #include <api/fs/fs.h>
33 #include <linux/time64.h>
35 #define PR_SET_NAME 15 /* Set process name */
39 #define MAX_PID 1024000
48 unsigned long nr_events;
49 unsigned long curr_event;
50 struct sched_atom **atoms;
61 enum sched_event_type {
65 SCHED_EVENT_MIGRATION,
69 enum sched_event_type type;
75 struct task_desc *wakee;
78 #define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP"
88 struct list_head list;
89 enum thread_state state;
97 struct list_head work_list;
98 struct thread *thread;
108 typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
112 struct trace_sched_handler {
113 int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
114 struct perf_sample *sample, struct machine *machine);
116 int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
117 struct perf_sample *sample, struct machine *machine);
119 int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
120 struct perf_sample *sample, struct machine *machine);
122 /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */
123 int (*fork_event)(struct perf_sched *sched, union perf_event *event,
124 struct machine *machine);
126 int (*migrate_task_event)(struct perf_sched *sched,
127 struct perf_evsel *evsel,
128 struct perf_sample *sample,
129 struct machine *machine);
132 #define COLOR_PIDS PERF_COLOR_BLUE
133 #define COLOR_CPUS PERF_COLOR_BG_RED
135 struct perf_sched_map {
136 DECLARE_BITMAP(comp_cpus_mask, MAX_CPUS);
139 struct thread_map *color_pids;
140 const char *color_pids_str;
141 struct cpu_map *color_cpus;
142 const char *color_cpus_str;
143 struct cpu_map *cpus;
144 const char *cpus_str;
148 struct perf_tool tool;
149 const char *sort_order;
150 unsigned long nr_tasks;
151 struct task_desc **pid_to_task;
152 struct task_desc **tasks;
153 const struct trace_sched_handler *tp_handler;
154 pthread_mutex_t start_work_mutex;
155 pthread_mutex_t work_done_wait_mutex;
158 * Track the current task - that way we can know whether there's any
159 * weird events, such as a task being switched away that is not current.
162 u32 curr_pid[MAX_CPUS];
163 struct thread *curr_thread[MAX_CPUS];
164 char next_shortname1;
165 char next_shortname2;
166 unsigned int replay_repeat;
167 unsigned long nr_run_events;
168 unsigned long nr_sleep_events;
169 unsigned long nr_wakeup_events;
170 unsigned long nr_sleep_corrections;
171 unsigned long nr_run_events_optimized;
172 unsigned long targetless_wakeups;
173 unsigned long multitarget_wakeups;
174 unsigned long nr_runs;
175 unsigned long nr_timestamps;
176 unsigned long nr_unordered_timestamps;
177 unsigned long nr_context_switch_bugs;
178 unsigned long nr_events;
179 unsigned long nr_lost_chunks;
180 unsigned long nr_lost_events;
181 u64 run_measurement_overhead;
182 u64 sleep_measurement_overhead;
185 u64 runavg_cpu_usage;
186 u64 parent_cpu_usage;
187 u64 runavg_parent_cpu_usage;
193 u64 cpu_last_switched[MAX_CPUS];
194 struct rb_root atom_root, sorted_atom_root, merged_atom_root;
195 struct list_head sort_list, cmp_pid;
198 struct perf_sched_map map;
200 /* options for timehist command */
204 unsigned int max_stack;
205 bool show_cpu_visual;
207 bool show_migrations;
209 const char *time_str;
210 struct perf_time_interval ptime;
213 /* per thread run time data */
214 struct thread_runtime {
215 u64 last_time; /* time of previous sched in/out event */
216 u64 dt_run; /* run time */
217 u64 dt_wait; /* time between CPU access (off cpu) */
218 u64 dt_delay; /* time between wakeup and sched-in */
219 u64 ready_to_run; /* time of wakeup */
221 struct stats run_stats;
227 /* per event run time data */
228 struct evsel_runtime {
229 u64 *last_time; /* time this event was last seen per cpu */
230 u32 ncpu; /* highest cpu slot allocated */
233 /* track idle times per cpu */
234 static struct thread **idle_threads;
235 static int idle_max_cpu;
236 static char idle_comm[] = "<idle>";
238 static u64 get_nsecs(void)
242 clock_gettime(CLOCK_MONOTONIC, &ts);
244 return ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec;
247 static void burn_nsecs(struct perf_sched *sched, u64 nsecs)
249 u64 T0 = get_nsecs(), T1;
253 } while (T1 + sched->run_measurement_overhead < T0 + nsecs);
256 static void sleep_nsecs(u64 nsecs)
260 ts.tv_nsec = nsecs % 999999999;
261 ts.tv_sec = nsecs / 999999999;
263 nanosleep(&ts, NULL);
266 static void calibrate_run_measurement_overhead(struct perf_sched *sched)
268 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
271 for (i = 0; i < 10; i++) {
273 burn_nsecs(sched, 0);
276 min_delta = min(min_delta, delta);
278 sched->run_measurement_overhead = min_delta;
280 printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
283 static void calibrate_sleep_measurement_overhead(struct perf_sched *sched)
285 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
288 for (i = 0; i < 10; i++) {
293 min_delta = min(min_delta, delta);
296 sched->sleep_measurement_overhead = min_delta;
298 printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
301 static struct sched_atom *
302 get_new_event(struct task_desc *task, u64 timestamp)
304 struct sched_atom *event = zalloc(sizeof(*event));
305 unsigned long idx = task->nr_events;
308 event->timestamp = timestamp;
312 size = sizeof(struct sched_atom *) * task->nr_events;
313 task->atoms = realloc(task->atoms, size);
314 BUG_ON(!task->atoms);
316 task->atoms[idx] = event;
321 static struct sched_atom *last_event(struct task_desc *task)
323 if (!task->nr_events)
326 return task->atoms[task->nr_events - 1];
329 static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task,
330 u64 timestamp, u64 duration)
332 struct sched_atom *event, *curr_event = last_event(task);
335 * optimize an existing RUN event by merging this one
338 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
339 sched->nr_run_events_optimized++;
340 curr_event->duration += duration;
344 event = get_new_event(task, timestamp);
346 event->type = SCHED_EVENT_RUN;
347 event->duration = duration;
349 sched->nr_run_events++;
352 static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task,
353 u64 timestamp, struct task_desc *wakee)
355 struct sched_atom *event, *wakee_event;
357 event = get_new_event(task, timestamp);
358 event->type = SCHED_EVENT_WAKEUP;
359 event->wakee = wakee;
361 wakee_event = last_event(wakee);
362 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
363 sched->targetless_wakeups++;
366 if (wakee_event->wait_sem) {
367 sched->multitarget_wakeups++;
371 wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
372 sem_init(wakee_event->wait_sem, 0, 0);
373 wakee_event->specific_wait = 1;
374 event->wait_sem = wakee_event->wait_sem;
376 sched->nr_wakeup_events++;
379 static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task,
380 u64 timestamp, u64 task_state __maybe_unused)
382 struct sched_atom *event = get_new_event(task, timestamp);
384 event->type = SCHED_EVENT_SLEEP;
386 sched->nr_sleep_events++;
389 static struct task_desc *register_pid(struct perf_sched *sched,
390 unsigned long pid, const char *comm)
392 struct task_desc *task;
395 if (sched->pid_to_task == NULL) {
396 if (sysctl__read_int("kernel/pid_max", &pid_max) < 0)
398 BUG_ON((sched->pid_to_task = calloc(pid_max, sizeof(struct task_desc *))) == NULL);
400 if (pid >= (unsigned long)pid_max) {
401 BUG_ON((sched->pid_to_task = realloc(sched->pid_to_task, (pid + 1) *
402 sizeof(struct task_desc *))) == NULL);
403 while (pid >= (unsigned long)pid_max)
404 sched->pid_to_task[pid_max++] = NULL;
407 task = sched->pid_to_task[pid];
412 task = zalloc(sizeof(*task));
414 task->nr = sched->nr_tasks;
415 strcpy(task->comm, comm);
417 * every task starts in sleeping state - this gets ignored
418 * if there's no wakeup pointing to this sleep state:
420 add_sched_event_sleep(sched, task, 0, 0);
422 sched->pid_to_task[pid] = task;
424 sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_desc *));
425 BUG_ON(!sched->tasks);
426 sched->tasks[task->nr] = task;
429 printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
435 static void print_task_traces(struct perf_sched *sched)
437 struct task_desc *task;
440 for (i = 0; i < sched->nr_tasks; i++) {
441 task = sched->tasks[i];
442 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
443 task->nr, task->comm, task->pid, task->nr_events);
447 static void add_cross_task_wakeups(struct perf_sched *sched)
449 struct task_desc *task1, *task2;
452 for (i = 0; i < sched->nr_tasks; i++) {
453 task1 = sched->tasks[i];
455 if (j == sched->nr_tasks)
457 task2 = sched->tasks[j];
458 add_sched_event_wakeup(sched, task1, 0, task2);
462 static void perf_sched__process_event(struct perf_sched *sched,
463 struct sched_atom *atom)
467 switch (atom->type) {
468 case SCHED_EVENT_RUN:
469 burn_nsecs(sched, atom->duration);
471 case SCHED_EVENT_SLEEP:
473 ret = sem_wait(atom->wait_sem);
476 case SCHED_EVENT_WAKEUP:
478 ret = sem_post(atom->wait_sem);
481 case SCHED_EVENT_MIGRATION:
488 static u64 get_cpu_usage_nsec_parent(void)
494 err = getrusage(RUSAGE_SELF, &ru);
497 sum = ru.ru_utime.tv_sec * NSEC_PER_SEC + ru.ru_utime.tv_usec * NSEC_PER_USEC;
498 sum += ru.ru_stime.tv_sec * NSEC_PER_SEC + ru.ru_stime.tv_usec * NSEC_PER_USEC;
503 static int self_open_counters(struct perf_sched *sched, unsigned long cur_task)
505 struct perf_event_attr attr;
506 char sbuf[STRERR_BUFSIZE], info[STRERR_BUFSIZE];
509 bool need_privilege = false;
511 memset(&attr, 0, sizeof(attr));
513 attr.type = PERF_TYPE_SOFTWARE;
514 attr.config = PERF_COUNT_SW_TASK_CLOCK;
517 fd = sys_perf_event_open(&attr, 0, -1, -1,
518 perf_event_open_cloexec_flag());
521 if (errno == EMFILE) {
523 BUG_ON(getrlimit(RLIMIT_NOFILE, &limit) == -1);
524 limit.rlim_cur += sched->nr_tasks - cur_task;
525 if (limit.rlim_cur > limit.rlim_max) {
526 limit.rlim_max = limit.rlim_cur;
527 need_privilege = true;
529 if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
530 if (need_privilege && errno == EPERM)
531 strcpy(info, "Need privilege\n");
535 strcpy(info, "Have a try with -f option\n");
537 pr_err("Error: sys_perf_event_open() syscall returned "
538 "with %d (%s)\n%s", fd,
539 str_error_r(errno, sbuf, sizeof(sbuf)), info);
545 static u64 get_cpu_usage_nsec_self(int fd)
550 ret = read(fd, &runtime, sizeof(runtime));
551 BUG_ON(ret != sizeof(runtime));
556 struct sched_thread_parms {
557 struct task_desc *task;
558 struct perf_sched *sched;
562 static void *thread_func(void *ctx)
564 struct sched_thread_parms *parms = ctx;
565 struct task_desc *this_task = parms->task;
566 struct perf_sched *sched = parms->sched;
567 u64 cpu_usage_0, cpu_usage_1;
568 unsigned long i, ret;
574 sprintf(comm2, ":%s", this_task->comm);
575 prctl(PR_SET_NAME, comm2);
579 ret = sem_post(&this_task->ready_for_work);
581 ret = pthread_mutex_lock(&sched->start_work_mutex);
583 ret = pthread_mutex_unlock(&sched->start_work_mutex);
586 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
588 for (i = 0; i < this_task->nr_events; i++) {
589 this_task->curr_event = i;
590 perf_sched__process_event(sched, this_task->atoms[i]);
593 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
594 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
595 ret = sem_post(&this_task->work_done_sem);
598 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
600 ret = pthread_mutex_unlock(&sched->work_done_wait_mutex);
606 static void create_tasks(struct perf_sched *sched)
608 struct task_desc *task;
613 err = pthread_attr_init(&attr);
615 err = pthread_attr_setstacksize(&attr,
616 (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
618 err = pthread_mutex_lock(&sched->start_work_mutex);
620 err = pthread_mutex_lock(&sched->work_done_wait_mutex);
622 for (i = 0; i < sched->nr_tasks; i++) {
623 struct sched_thread_parms *parms = malloc(sizeof(*parms));
624 BUG_ON(parms == NULL);
625 parms->task = task = sched->tasks[i];
626 parms->sched = sched;
627 parms->fd = self_open_counters(sched, i);
628 sem_init(&task->sleep_sem, 0, 0);
629 sem_init(&task->ready_for_work, 0, 0);
630 sem_init(&task->work_done_sem, 0, 0);
631 task->curr_event = 0;
632 err = pthread_create(&task->thread, &attr, thread_func, parms);
637 static void wait_for_tasks(struct perf_sched *sched)
639 u64 cpu_usage_0, cpu_usage_1;
640 struct task_desc *task;
641 unsigned long i, ret;
643 sched->start_time = get_nsecs();
644 sched->cpu_usage = 0;
645 pthread_mutex_unlock(&sched->work_done_wait_mutex);
647 for (i = 0; i < sched->nr_tasks; i++) {
648 task = sched->tasks[i];
649 ret = sem_wait(&task->ready_for_work);
651 sem_init(&task->ready_for_work, 0, 0);
653 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
656 cpu_usage_0 = get_cpu_usage_nsec_parent();
658 pthread_mutex_unlock(&sched->start_work_mutex);
660 for (i = 0; i < sched->nr_tasks; i++) {
661 task = sched->tasks[i];
662 ret = sem_wait(&task->work_done_sem);
664 sem_init(&task->work_done_sem, 0, 0);
665 sched->cpu_usage += task->cpu_usage;
669 cpu_usage_1 = get_cpu_usage_nsec_parent();
670 if (!sched->runavg_cpu_usage)
671 sched->runavg_cpu_usage = sched->cpu_usage;
672 sched->runavg_cpu_usage = (sched->runavg_cpu_usage * (sched->replay_repeat - 1) + sched->cpu_usage) / sched->replay_repeat;
674 sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
675 if (!sched->runavg_parent_cpu_usage)
676 sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
677 sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * (sched->replay_repeat - 1) +
678 sched->parent_cpu_usage)/sched->replay_repeat;
680 ret = pthread_mutex_lock(&sched->start_work_mutex);
683 for (i = 0; i < sched->nr_tasks; i++) {
684 task = sched->tasks[i];
685 sem_init(&task->sleep_sem, 0, 0);
686 task->curr_event = 0;
690 static void run_one_test(struct perf_sched *sched)
692 u64 T0, T1, delta, avg_delta, fluct;
695 wait_for_tasks(sched);
699 sched->sum_runtime += delta;
702 avg_delta = sched->sum_runtime / sched->nr_runs;
703 if (delta < avg_delta)
704 fluct = avg_delta - delta;
706 fluct = delta - avg_delta;
707 sched->sum_fluct += fluct;
709 sched->run_avg = delta;
710 sched->run_avg = (sched->run_avg * (sched->replay_repeat - 1) + delta) / sched->replay_repeat;
712 printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / NSEC_PER_MSEC);
714 printf("ravg: %0.2f, ", (double)sched->run_avg / NSEC_PER_MSEC);
716 printf("cpu: %0.2f / %0.2f",
717 (double)sched->cpu_usage / NSEC_PER_MSEC, (double)sched->runavg_cpu_usage / NSEC_PER_MSEC);
721 * rusage statistics done by the parent, these are less
722 * accurate than the sched->sum_exec_runtime based statistics:
724 printf(" [%0.2f / %0.2f]",
725 (double)sched->parent_cpu_usage / NSEC_PER_MSEC,
726 (double)sched->runavg_parent_cpu_usage / NSEC_PER_MSEC);
731 if (sched->nr_sleep_corrections)
732 printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections);
733 sched->nr_sleep_corrections = 0;
736 static void test_calibrations(struct perf_sched *sched)
741 burn_nsecs(sched, NSEC_PER_MSEC);
744 printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
747 sleep_nsecs(NSEC_PER_MSEC);
750 printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
754 replay_wakeup_event(struct perf_sched *sched,
755 struct perf_evsel *evsel, struct perf_sample *sample,
756 struct machine *machine __maybe_unused)
758 const char *comm = perf_evsel__strval(evsel, sample, "comm");
759 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
760 struct task_desc *waker, *wakee;
763 printf("sched_wakeup event %p\n", evsel);
765 printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
768 waker = register_pid(sched, sample->tid, "<unknown>");
769 wakee = register_pid(sched, pid, comm);
771 add_sched_event_wakeup(sched, waker, sample->time, wakee);
775 static int replay_switch_event(struct perf_sched *sched,
776 struct perf_evsel *evsel,
777 struct perf_sample *sample,
778 struct machine *machine __maybe_unused)
780 const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
781 *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
782 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
783 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
784 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
785 struct task_desc *prev, __maybe_unused *next;
786 u64 timestamp0, timestamp = sample->time;
787 int cpu = sample->cpu;
791 printf("sched_switch event %p\n", evsel);
793 if (cpu >= MAX_CPUS || cpu < 0)
796 timestamp0 = sched->cpu_last_switched[cpu];
798 delta = timestamp - timestamp0;
803 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
807 pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
808 prev_comm, prev_pid, next_comm, next_pid, delta);
810 prev = register_pid(sched, prev_pid, prev_comm);
811 next = register_pid(sched, next_pid, next_comm);
813 sched->cpu_last_switched[cpu] = timestamp;
815 add_sched_event_run(sched, prev, timestamp, delta);
816 add_sched_event_sleep(sched, prev, timestamp, prev_state);
821 static int replay_fork_event(struct perf_sched *sched,
822 union perf_event *event,
823 struct machine *machine)
825 struct thread *child, *parent;
827 child = machine__findnew_thread(machine, event->fork.pid,
829 parent = machine__findnew_thread(machine, event->fork.ppid,
832 if (child == NULL || parent == NULL) {
833 pr_debug("thread does not exist on fork event: child %p, parent %p\n",
839 printf("fork event\n");
840 printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid);
841 printf("... child: %s/%d\n", thread__comm_str(child), child->tid);
844 register_pid(sched, parent->tid, thread__comm_str(parent));
845 register_pid(sched, child->tid, thread__comm_str(child));
852 struct sort_dimension {
855 struct list_head list;
859 thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
861 struct sort_dimension *sort;
864 BUG_ON(list_empty(list));
866 list_for_each_entry(sort, list, list) {
867 ret = sort->cmp(l, r);
875 static struct work_atoms *
876 thread_atoms_search(struct rb_root *root, struct thread *thread,
877 struct list_head *sort_list)
879 struct rb_node *node = root->rb_node;
880 struct work_atoms key = { .thread = thread };
883 struct work_atoms *atoms;
886 atoms = container_of(node, struct work_atoms, node);
888 cmp = thread_lat_cmp(sort_list, &key, atoms);
890 node = node->rb_left;
892 node = node->rb_right;
894 BUG_ON(thread != atoms->thread);
902 __thread_latency_insert(struct rb_root *root, struct work_atoms *data,
903 struct list_head *sort_list)
905 struct rb_node **new = &(root->rb_node), *parent = NULL;
908 struct work_atoms *this;
911 this = container_of(*new, struct work_atoms, node);
914 cmp = thread_lat_cmp(sort_list, data, this);
917 new = &((*new)->rb_left);
919 new = &((*new)->rb_right);
922 rb_link_node(&data->node, parent, new);
923 rb_insert_color(&data->node, root);
926 static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
928 struct work_atoms *atoms = zalloc(sizeof(*atoms));
930 pr_err("No memory at %s\n", __func__);
934 atoms->thread = thread__get(thread);
935 INIT_LIST_HEAD(&atoms->work_list);
936 __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);
940 static char sched_out_state(u64 prev_state)
942 const char *str = TASK_STATE_TO_CHAR_STR;
944 return str[prev_state];
948 add_sched_out_event(struct work_atoms *atoms,
952 struct work_atom *atom = zalloc(sizeof(*atom));
954 pr_err("Non memory at %s", __func__);
958 atom->sched_out_time = timestamp;
960 if (run_state == 'R') {
961 atom->state = THREAD_WAIT_CPU;
962 atom->wake_up_time = atom->sched_out_time;
965 list_add_tail(&atom->list, &atoms->work_list);
970 add_runtime_event(struct work_atoms *atoms, u64 delta,
971 u64 timestamp __maybe_unused)
973 struct work_atom *atom;
975 BUG_ON(list_empty(&atoms->work_list));
977 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
979 atom->runtime += delta;
980 atoms->total_runtime += delta;
984 add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
986 struct work_atom *atom;
989 if (list_empty(&atoms->work_list))
992 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
994 if (atom->state != THREAD_WAIT_CPU)
997 if (timestamp < atom->wake_up_time) {
998 atom->state = THREAD_IGNORE;
1002 atom->state = THREAD_SCHED_IN;
1003 atom->sched_in_time = timestamp;
1005 delta = atom->sched_in_time - atom->wake_up_time;
1006 atoms->total_lat += delta;
1007 if (delta > atoms->max_lat) {
1008 atoms->max_lat = delta;
1009 atoms->max_lat_at = timestamp;
1014 static int latency_switch_event(struct perf_sched *sched,
1015 struct perf_evsel *evsel,
1016 struct perf_sample *sample,
1017 struct machine *machine)
1019 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1020 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1021 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
1022 struct work_atoms *out_events, *in_events;
1023 struct thread *sched_out, *sched_in;
1024 u64 timestamp0, timestamp = sample->time;
1025 int cpu = sample->cpu, err = -1;
1028 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1030 timestamp0 = sched->cpu_last_switched[cpu];
1031 sched->cpu_last_switched[cpu] = timestamp;
1033 delta = timestamp - timestamp0;
1038 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1042 sched_out = machine__findnew_thread(machine, -1, prev_pid);
1043 sched_in = machine__findnew_thread(machine, -1, next_pid);
1044 if (sched_out == NULL || sched_in == NULL)
1047 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
1049 if (thread_atoms_insert(sched, sched_out))
1051 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
1053 pr_err("out-event: Internal tree error");
1057 if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
1060 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
1062 if (thread_atoms_insert(sched, sched_in))
1064 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
1066 pr_err("in-event: Internal tree error");
1070 * Take came in we have not heard about yet,
1071 * add in an initial atom in runnable state:
1073 if (add_sched_out_event(in_events, 'R', timestamp))
1076 add_sched_in_event(in_events, timestamp);
1079 thread__put(sched_out);
1080 thread__put(sched_in);
1084 static int latency_runtime_event(struct perf_sched *sched,
1085 struct perf_evsel *evsel,
1086 struct perf_sample *sample,
1087 struct machine *machine)
1089 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
1090 const u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
1091 struct thread *thread = machine__findnew_thread(machine, -1, pid);
1092 struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
1093 u64 timestamp = sample->time;
1094 int cpu = sample->cpu, err = -1;
1099 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1101 if (thread_atoms_insert(sched, thread))
1103 atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
1105 pr_err("in-event: Internal tree error");
1108 if (add_sched_out_event(atoms, 'R', timestamp))
1112 add_runtime_event(atoms, runtime, timestamp);
1115 thread__put(thread);
1119 static int latency_wakeup_event(struct perf_sched *sched,
1120 struct perf_evsel *evsel,
1121 struct perf_sample *sample,
1122 struct machine *machine)
1124 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
1125 struct work_atoms *atoms;
1126 struct work_atom *atom;
1127 struct thread *wakee;
1128 u64 timestamp = sample->time;
1131 wakee = machine__findnew_thread(machine, -1, pid);
1134 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
1136 if (thread_atoms_insert(sched, wakee))
1138 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
1140 pr_err("wakeup-event: Internal tree error");
1143 if (add_sched_out_event(atoms, 'S', timestamp))
1147 BUG_ON(list_empty(&atoms->work_list));
1149 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1152 * As we do not guarantee the wakeup event happens when
1153 * task is out of run queue, also may happen when task is
1154 * on run queue and wakeup only change ->state to TASK_RUNNING,
1155 * then we should not set the ->wake_up_time when wake up a
1156 * task which is on run queue.
1158 * You WILL be missing events if you've recorded only
1159 * one CPU, or are only looking at only one, so don't
1160 * skip in this case.
1162 if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
1165 sched->nr_timestamps++;
1166 if (atom->sched_out_time > timestamp) {
1167 sched->nr_unordered_timestamps++;
1171 atom->state = THREAD_WAIT_CPU;
1172 atom->wake_up_time = timestamp;
1180 static int latency_migrate_task_event(struct perf_sched *sched,
1181 struct perf_evsel *evsel,
1182 struct perf_sample *sample,
1183 struct machine *machine)
1185 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
1186 u64 timestamp = sample->time;
1187 struct work_atoms *atoms;
1188 struct work_atom *atom;
1189 struct thread *migrant;
1193 * Only need to worry about migration when profiling one CPU.
1195 if (sched->profile_cpu == -1)
1198 migrant = machine__findnew_thread(machine, -1, pid);
1199 if (migrant == NULL)
1201 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
1203 if (thread_atoms_insert(sched, migrant))
1205 register_pid(sched, migrant->tid, thread__comm_str(migrant));
1206 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
1208 pr_err("migration-event: Internal tree error");
1211 if (add_sched_out_event(atoms, 'R', timestamp))
1215 BUG_ON(list_empty(&atoms->work_list));
1217 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1218 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1220 sched->nr_timestamps++;
1222 if (atom->sched_out_time > timestamp)
1223 sched->nr_unordered_timestamps++;
1226 thread__put(migrant);
1230 static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list)
1235 char max_lat_at[32];
1237 if (!work_list->nb_atoms)
1240 * Ignore idle threads:
1242 if (!strcmp(thread__comm_str(work_list->thread), "swapper"))
1245 sched->all_runtime += work_list->total_runtime;
1246 sched->all_count += work_list->nb_atoms;
1248 if (work_list->num_merged > 1)
1249 ret = printf(" %s:(%d) ", thread__comm_str(work_list->thread), work_list->num_merged);
1251 ret = printf(" %s:%d ", thread__comm_str(work_list->thread), work_list->thread->tid);
1253 for (i = 0; i < 24 - ret; i++)
1256 avg = work_list->total_lat / work_list->nb_atoms;
1257 timestamp__scnprintf_usec(work_list->max_lat_at, max_lat_at, sizeof(max_lat_at));
1259 printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13s s\n",
1260 (double)work_list->total_runtime / NSEC_PER_MSEC,
1261 work_list->nb_atoms, (double)avg / NSEC_PER_MSEC,
1262 (double)work_list->max_lat / NSEC_PER_MSEC,
1266 static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
1268 if (l->thread == r->thread)
1270 if (l->thread->tid < r->thread->tid)
1272 if (l->thread->tid > r->thread->tid)
1274 return (int)(l->thread - r->thread);
1277 static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
1287 avgl = l->total_lat / l->nb_atoms;
1288 avgr = r->total_lat / r->nb_atoms;
1298 static int max_cmp(struct work_atoms *l, struct work_atoms *r)
1300 if (l->max_lat < r->max_lat)
1302 if (l->max_lat > r->max_lat)
1308 static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
1310 if (l->nb_atoms < r->nb_atoms)
1312 if (l->nb_atoms > r->nb_atoms)
1318 static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
1320 if (l->total_runtime < r->total_runtime)
1322 if (l->total_runtime > r->total_runtime)
1328 static int sort_dimension__add(const char *tok, struct list_head *list)
1331 static struct sort_dimension avg_sort_dimension = {
1335 static struct sort_dimension max_sort_dimension = {
1339 static struct sort_dimension pid_sort_dimension = {
1343 static struct sort_dimension runtime_sort_dimension = {
1347 static struct sort_dimension switch_sort_dimension = {
1351 struct sort_dimension *available_sorts[] = {
1352 &pid_sort_dimension,
1353 &avg_sort_dimension,
1354 &max_sort_dimension,
1355 &switch_sort_dimension,
1356 &runtime_sort_dimension,
1359 for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
1360 if (!strcmp(available_sorts[i]->name, tok)) {
1361 list_add_tail(&available_sorts[i]->list, list);
1370 static void perf_sched__sort_lat(struct perf_sched *sched)
1372 struct rb_node *node;
1373 struct rb_root *root = &sched->atom_root;
1376 struct work_atoms *data;
1377 node = rb_first(root);
1381 rb_erase(node, root);
1382 data = rb_entry(node, struct work_atoms, node);
1383 __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list);
1385 if (root == &sched->atom_root) {
1386 root = &sched->merged_atom_root;
1391 static int process_sched_wakeup_event(struct perf_tool *tool,
1392 struct perf_evsel *evsel,
1393 struct perf_sample *sample,
1394 struct machine *machine)
1396 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1398 if (sched->tp_handler->wakeup_event)
1399 return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
1409 static bool thread__has_color(struct thread *thread)
1411 union map_priv priv = {
1412 .ptr = thread__priv(thread),
1418 static struct thread*
1419 map__findnew_thread(struct perf_sched *sched, struct machine *machine, pid_t pid, pid_t tid)
1421 struct thread *thread = machine__findnew_thread(machine, pid, tid);
1422 union map_priv priv = {
1426 if (!sched->map.color_pids || !thread || thread__priv(thread))
1429 if (thread_map__has(sched->map.color_pids, tid))
1432 thread__set_priv(thread, priv.ptr);
1436 static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
1437 struct perf_sample *sample, struct machine *machine)
1439 const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1440 struct thread *sched_in;
1442 u64 timestamp0, timestamp = sample->time;
1444 int i, this_cpu = sample->cpu;
1446 bool new_cpu = false;
1447 const char *color = PERF_COLOR_NORMAL;
1448 char stimestamp[32];
1450 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1452 if (this_cpu > sched->max_cpu)
1453 sched->max_cpu = this_cpu;
1455 if (sched->map.comp) {
1456 cpus_nr = bitmap_weight(sched->map.comp_cpus_mask, MAX_CPUS);
1457 if (!test_and_set_bit(this_cpu, sched->map.comp_cpus_mask)) {
1458 sched->map.comp_cpus[cpus_nr++] = this_cpu;
1462 cpus_nr = sched->max_cpu;
1464 timestamp0 = sched->cpu_last_switched[this_cpu];
1465 sched->cpu_last_switched[this_cpu] = timestamp;
1467 delta = timestamp - timestamp0;
1472 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1476 sched_in = map__findnew_thread(sched, machine, -1, next_pid);
1477 if (sched_in == NULL)
1480 sched->curr_thread[this_cpu] = thread__get(sched_in);
1485 if (!sched_in->shortname[0]) {
1486 if (!strcmp(thread__comm_str(sched_in), "swapper")) {
1488 * Don't allocate a letter-number for swapper:0
1489 * as a shortname. Instead, we use '.' for it.
1491 sched_in->shortname[0] = '.';
1492 sched_in->shortname[1] = ' ';
1494 sched_in->shortname[0] = sched->next_shortname1;
1495 sched_in->shortname[1] = sched->next_shortname2;
1497 if (sched->next_shortname1 < 'Z') {
1498 sched->next_shortname1++;
1500 sched->next_shortname1 = 'A';
1501 if (sched->next_shortname2 < '9')
1502 sched->next_shortname2++;
1504 sched->next_shortname2 = '0';
1510 for (i = 0; i < cpus_nr; i++) {
1511 int cpu = sched->map.comp ? sched->map.comp_cpus[i] : i;
1512 struct thread *curr_thread = sched->curr_thread[cpu];
1513 const char *pid_color = color;
1514 const char *cpu_color = color;
1516 if (curr_thread && thread__has_color(curr_thread))
1517 pid_color = COLOR_PIDS;
1519 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, cpu))
1522 if (sched->map.color_cpus && cpu_map__has(sched->map.color_cpus, cpu))
1523 cpu_color = COLOR_CPUS;
1525 if (cpu != this_cpu)
1526 color_fprintf(stdout, color, " ");
1528 color_fprintf(stdout, cpu_color, "*");
1530 if (sched->curr_thread[cpu])
1531 color_fprintf(stdout, pid_color, "%2s ", sched->curr_thread[cpu]->shortname);
1533 color_fprintf(stdout, color, " ");
1536 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, this_cpu))
1539 timestamp__scnprintf_usec(timestamp, stimestamp, sizeof(stimestamp));
1540 color_fprintf(stdout, color, " %12s secs ", stimestamp);
1541 if (new_shortname || (verbose && sched_in->tid)) {
1542 const char *pid_color = color;
1544 if (thread__has_color(sched_in))
1545 pid_color = COLOR_PIDS;
1547 color_fprintf(stdout, pid_color, "%s => %s:%d",
1548 sched_in->shortname, thread__comm_str(sched_in), sched_in->tid);
1551 if (sched->map.comp && new_cpu)
1552 color_fprintf(stdout, color, " (CPU %d)", this_cpu);
1555 color_fprintf(stdout, color, "\n");
1557 thread__put(sched_in);
1562 static int process_sched_switch_event(struct perf_tool *tool,
1563 struct perf_evsel *evsel,
1564 struct perf_sample *sample,
1565 struct machine *machine)
1567 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1568 int this_cpu = sample->cpu, err = 0;
1569 u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1570 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1572 if (sched->curr_pid[this_cpu] != (u32)-1) {
1574 * Are we trying to switch away a PID that is
1577 if (sched->curr_pid[this_cpu] != prev_pid)
1578 sched->nr_context_switch_bugs++;
1581 if (sched->tp_handler->switch_event)
1582 err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
1584 sched->curr_pid[this_cpu] = next_pid;
1588 static int process_sched_runtime_event(struct perf_tool *tool,
1589 struct perf_evsel *evsel,
1590 struct perf_sample *sample,
1591 struct machine *machine)
1593 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1595 if (sched->tp_handler->runtime_event)
1596 return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
1601 static int perf_sched__process_fork_event(struct perf_tool *tool,
1602 union perf_event *event,
1603 struct perf_sample *sample,
1604 struct machine *machine)
1606 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1608 /* run the fork event through the perf machineruy */
1609 perf_event__process_fork(tool, event, sample, machine);
1611 /* and then run additional processing needed for this command */
1612 if (sched->tp_handler->fork_event)
1613 return sched->tp_handler->fork_event(sched, event, machine);
1618 static int process_sched_migrate_task_event(struct perf_tool *tool,
1619 struct perf_evsel *evsel,
1620 struct perf_sample *sample,
1621 struct machine *machine)
1623 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1625 if (sched->tp_handler->migrate_task_event)
1626 return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
1631 typedef int (*tracepoint_handler)(struct perf_tool *tool,
1632 struct perf_evsel *evsel,
1633 struct perf_sample *sample,
1634 struct machine *machine);
1636 static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
1637 union perf_event *event __maybe_unused,
1638 struct perf_sample *sample,
1639 struct perf_evsel *evsel,
1640 struct machine *machine)
1644 if (evsel->handler != NULL) {
1645 tracepoint_handler f = evsel->handler;
1646 err = f(tool, evsel, sample, machine);
1652 static int perf_sched__read_events(struct perf_sched *sched)
1654 const struct perf_evsel_str_handler handlers[] = {
1655 { "sched:sched_switch", process_sched_switch_event, },
1656 { "sched:sched_stat_runtime", process_sched_runtime_event, },
1657 { "sched:sched_wakeup", process_sched_wakeup_event, },
1658 { "sched:sched_wakeup_new", process_sched_wakeup_event, },
1659 { "sched:sched_migrate_task", process_sched_migrate_task_event, },
1661 struct perf_session *session;
1662 struct perf_data_file file = {
1664 .mode = PERF_DATA_MODE_READ,
1665 .force = sched->force,
1669 session = perf_session__new(&file, false, &sched->tool);
1670 if (session == NULL) {
1671 pr_debug("No Memory for session\n");
1675 symbol__init(&session->header.env);
1677 if (perf_session__set_tracepoints_handlers(session, handlers))
1680 if (perf_session__has_traces(session, "record -R")) {
1681 int err = perf_session__process_events(session);
1683 pr_err("Failed to process events, error %d", err);
1687 sched->nr_events = session->evlist->stats.nr_events[0];
1688 sched->nr_lost_events = session->evlist->stats.total_lost;
1689 sched->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST];
1694 perf_session__delete(session);
1699 * scheduling times are printed as msec.usec
1701 static inline void print_sched_time(unsigned long long nsecs, int width)
1703 unsigned long msecs;
1704 unsigned long usecs;
1706 msecs = nsecs / NSEC_PER_MSEC;
1707 nsecs -= msecs * NSEC_PER_MSEC;
1708 usecs = nsecs / NSEC_PER_USEC;
1709 printf("%*lu.%03lu ", width, msecs, usecs);
1713 * returns runtime data for event, allocating memory for it the
1714 * first time it is used.
1716 static struct evsel_runtime *perf_evsel__get_runtime(struct perf_evsel *evsel)
1718 struct evsel_runtime *r = evsel->priv;
1721 r = zalloc(sizeof(struct evsel_runtime));
1729 * save last time event was seen per cpu
1731 static void perf_evsel__save_time(struct perf_evsel *evsel,
1732 u64 timestamp, u32 cpu)
1734 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1739 if ((cpu >= r->ncpu) || (r->last_time == NULL)) {
1740 int i, n = __roundup_pow_of_two(cpu+1);
1741 void *p = r->last_time;
1743 p = realloc(r->last_time, n * sizeof(u64));
1748 for (i = r->ncpu; i < n; ++i)
1749 r->last_time[i] = (u64) 0;
1754 r->last_time[cpu] = timestamp;
1757 /* returns last time this event was seen on the given cpu */
1758 static u64 perf_evsel__get_time(struct perf_evsel *evsel, u32 cpu)
1760 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1762 if ((r == NULL) || (r->last_time == NULL) || (cpu >= r->ncpu))
1765 return r->last_time[cpu];
1768 static int comm_width = 20;
1770 static char *timehist_get_commstr(struct thread *thread)
1772 static char str[32];
1773 const char *comm = thread__comm_str(thread);
1774 pid_t tid = thread->tid;
1775 pid_t pid = thread->pid_;
1779 n = scnprintf(str, sizeof(str), "%s", comm);
1781 else if (tid != pid)
1782 n = scnprintf(str, sizeof(str), "%s[%d/%d]", comm, tid, pid);
1785 n = scnprintf(str, sizeof(str), "%s[%d]", comm, tid);
1793 static void timehist_header(struct perf_sched *sched)
1795 u32 ncpus = sched->max_cpu + 1;
1798 printf("%15s %6s ", "time", "cpu");
1800 if (sched->show_cpu_visual) {
1802 for (i = 0, j = 0; i < ncpus; ++i) {
1810 printf(" %-20s %9s %9s %9s",
1811 "task name", "wait time", "sch delay", "run time");
1818 printf("%15s %-6s ", "", "");
1820 if (sched->show_cpu_visual)
1821 printf(" %*s ", ncpus, "");
1823 printf(" %-20s %9s %9s %9s\n", "[tid/pid]", "(msec)", "(msec)", "(msec)");
1828 printf("%.15s %.6s ", graph_dotted_line, graph_dotted_line);
1830 if (sched->show_cpu_visual)
1831 printf(" %.*s ", ncpus, graph_dotted_line);
1833 printf(" %.20s %.9s %.9s %.9s",
1834 graph_dotted_line, graph_dotted_line, graph_dotted_line,
1840 static void timehist_print_sample(struct perf_sched *sched,
1841 struct perf_sample *sample,
1842 struct addr_location *al,
1843 struct thread *thread,
1846 struct thread_runtime *tr = thread__priv(thread);
1847 u32 max_cpus = sched->max_cpu + 1;
1850 timestamp__scnprintf_usec(t, tstr, sizeof(tstr));
1851 printf("%15s [%04d] ", tstr, sample->cpu);
1853 if (sched->show_cpu_visual) {
1858 for (i = 0; i < max_cpus; ++i) {
1859 /* flag idle times with 'i'; others are sched events */
1860 if (i == sample->cpu)
1861 c = (thread->tid == 0) ? 'i' : 's';
1869 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
1871 print_sched_time(tr->dt_wait, 6);
1872 print_sched_time(tr->dt_delay, 6);
1873 print_sched_time(tr->dt_run, 6);
1875 if (sched->show_wakeups)
1876 printf(" %-*s", comm_width, "");
1878 if (thread->tid == 0)
1881 if (sched->show_callchain)
1884 sample__fprintf_sym(sample, al, 0,
1885 EVSEL__PRINT_SYM | EVSEL__PRINT_ONELINE |
1886 EVSEL__PRINT_CALLCHAIN_ARROW |
1887 EVSEL__PRINT_SKIP_IGNORED,
1888 &callchain_cursor, stdout);
1895 * Explanation of delta-time stats:
1897 * t = time of current schedule out event
1898 * tprev = time of previous sched out event
1899 * also time of schedule-in event for current task
1900 * last_time = time of last sched change event for current task
1901 * (i.e, time process was last scheduled out)
1902 * ready_to_run = time of wakeup for current task
1904 * -----|------------|------------|------------|------
1905 * last ready tprev t
1908 * |-------- dt_wait --------|
1909 * |- dt_delay -|-- dt_run --|
1911 * dt_run = run time of current task
1912 * dt_wait = time between last schedule out event for task and tprev
1913 * represents time spent off the cpu
1914 * dt_delay = time between wakeup and schedule-in of task
1917 static void timehist_update_runtime_stats(struct thread_runtime *r,
1924 r->dt_run = t - tprev;
1925 if (r->ready_to_run) {
1926 if (r->ready_to_run > tprev)
1927 pr_debug("time travel: wakeup time for task > previous sched_switch event\n");
1929 r->dt_delay = tprev - r->ready_to_run;
1932 if (r->last_time > tprev)
1933 pr_debug("time travel: last sched out time for task > previous sched_switch event\n");
1934 else if (r->last_time)
1935 r->dt_wait = tprev - r->last_time;
1938 update_stats(&r->run_stats, r->dt_run);
1939 r->total_run_time += r->dt_run;
1942 static bool is_idle_sample(struct perf_sched *sched,
1943 struct perf_sample *sample,
1944 struct perf_evsel *evsel,
1945 struct machine *machine)
1947 struct thread *thread;
1948 struct callchain_cursor *cursor = &callchain_cursor;
1950 /* pid 0 == swapper == idle task */
1951 if (sample->pid == 0)
1954 if (strcmp(perf_evsel__name(evsel), "sched:sched_switch") == 0) {
1955 if (perf_evsel__intval(evsel, sample, "prev_pid") == 0)
1959 /* want main thread for process - has maps */
1960 thread = machine__findnew_thread(machine, sample->pid, sample->pid);
1961 if (thread == NULL) {
1962 pr_debug("Failed to get thread for pid %d.\n", sample->pid);
1966 if (!symbol_conf.use_callchain || sample->callchain == NULL)
1969 if (thread__resolve_callchain(thread, cursor, evsel, sample,
1970 NULL, NULL, sched->max_stack + 2) != 0) {
1972 error("Failed to resolve callchain. Skipping\n");
1977 callchain_cursor_commit(cursor);
1980 struct callchain_cursor_node *node;
1983 node = callchain_cursor_current(cursor);
1988 if (sym && sym->name) {
1989 if (!strcmp(sym->name, "schedule") ||
1990 !strcmp(sym->name, "__schedule") ||
1991 !strcmp(sym->name, "preempt_schedule"))
1995 callchain_cursor_advance(cursor);
2002 * Track idle stats per cpu by maintaining a local thread
2003 * struct for the idle task on each cpu.
2005 static int init_idle_threads(int ncpu)
2009 idle_threads = zalloc(ncpu * sizeof(struct thread *));
2013 idle_max_cpu = ncpu - 1;
2015 /* allocate the actual thread struct if needed */
2016 for (i = 0; i < ncpu; ++i) {
2017 idle_threads[i] = thread__new(0, 0);
2018 if (idle_threads[i] == NULL)
2021 thread__set_comm(idle_threads[i], idle_comm, 0);
2027 static void free_idle_threads(void)
2031 if (idle_threads == NULL)
2034 for (i = 0; i <= idle_max_cpu; ++i) {
2035 if ((idle_threads[i]))
2036 thread__delete(idle_threads[i]);
2042 static struct thread *get_idle_thread(int cpu)
2045 * expand/allocate array of pointers to local thread
2048 if ((cpu >= idle_max_cpu) || (idle_threads == NULL)) {
2049 int i, j = __roundup_pow_of_two(cpu+1);
2052 p = realloc(idle_threads, j * sizeof(struct thread *));
2056 idle_threads = (struct thread **) p;
2057 i = idle_max_cpu ? idle_max_cpu + 1 : 0;
2059 idle_threads[i] = NULL;
2064 /* allocate a new thread struct if needed */
2065 if (idle_threads[cpu] == NULL) {
2066 idle_threads[cpu] = thread__new(0, 0);
2068 if (idle_threads[cpu]) {
2069 idle_threads[cpu]->tid = 0;
2070 thread__set_comm(idle_threads[cpu], idle_comm, 0);
2074 return idle_threads[cpu];
2078 * handle runtime stats saved per thread
2080 static struct thread_runtime *thread__init_runtime(struct thread *thread)
2082 struct thread_runtime *r;
2084 r = zalloc(sizeof(struct thread_runtime));
2088 init_stats(&r->run_stats);
2089 thread__set_priv(thread, r);
2094 static struct thread_runtime *thread__get_runtime(struct thread *thread)
2096 struct thread_runtime *tr;
2098 tr = thread__priv(thread);
2100 tr = thread__init_runtime(thread);
2102 pr_debug("Failed to malloc memory for runtime data.\n");
2108 static struct thread *timehist_get_thread(struct perf_sched *sched,
2109 struct perf_sample *sample,
2110 struct machine *machine,
2111 struct perf_evsel *evsel)
2113 struct thread *thread;
2115 if (is_idle_sample(sched, sample, evsel, machine)) {
2116 thread = get_idle_thread(sample->cpu);
2118 pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
2121 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2122 if (thread == NULL) {
2123 pr_debug("Failed to get thread for tid %d. skipping sample.\n",
2131 static bool timehist_skip_sample(struct perf_sched *sched,
2132 struct thread *thread)
2136 if (thread__is_filtered(thread)) {
2138 sched->skipped_samples++;
2144 static void timehist_print_wakeup_event(struct perf_sched *sched,
2145 struct perf_sample *sample,
2146 struct machine *machine,
2147 struct thread *awakened)
2149 struct thread *thread;
2152 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2156 /* show wakeup unless both awakee and awaker are filtered */
2157 if (timehist_skip_sample(sched, thread) &&
2158 timehist_skip_sample(sched, awakened)) {
2162 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2163 printf("%15s [%04d] ", tstr, sample->cpu);
2164 if (sched->show_cpu_visual)
2165 printf(" %*s ", sched->max_cpu + 1, "");
2167 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2170 printf(" %9s %9s %9s ", "", "", "");
2172 printf("awakened: %s", timehist_get_commstr(awakened));
2177 static int timehist_sched_wakeup_event(struct perf_tool *tool,
2178 union perf_event *event __maybe_unused,
2179 struct perf_evsel *evsel,
2180 struct perf_sample *sample,
2181 struct machine *machine)
2183 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2184 struct thread *thread;
2185 struct thread_runtime *tr = NULL;
2186 /* want pid of awakened task not pid in sample */
2187 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2189 thread = machine__findnew_thread(machine, 0, pid);
2193 tr = thread__get_runtime(thread);
2197 if (tr->ready_to_run == 0)
2198 tr->ready_to_run = sample->time;
2200 /* show wakeups if requested */
2201 if (sched->show_wakeups &&
2202 !perf_time__skip_sample(&sched->ptime, sample->time))
2203 timehist_print_wakeup_event(sched, sample, machine, thread);
2208 static void timehist_print_migration_event(struct perf_sched *sched,
2209 struct perf_evsel *evsel,
2210 struct perf_sample *sample,
2211 struct machine *machine,
2212 struct thread *migrated)
2214 struct thread *thread;
2216 u32 max_cpus = sched->max_cpu + 1;
2219 if (sched->summary_only)
2222 max_cpus = sched->max_cpu + 1;
2223 ocpu = perf_evsel__intval(evsel, sample, "orig_cpu");
2224 dcpu = perf_evsel__intval(evsel, sample, "dest_cpu");
2226 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2230 if (timehist_skip_sample(sched, thread) &&
2231 timehist_skip_sample(sched, migrated)) {
2235 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2236 printf("%15s [%04d] ", tstr, sample->cpu);
2238 if (sched->show_cpu_visual) {
2243 for (i = 0; i < max_cpus; ++i) {
2244 c = (i == sample->cpu) ? 'm' : ' ';
2250 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2253 printf(" %9s %9s %9s ", "", "", "");
2255 printf("migrated: %s", timehist_get_commstr(migrated));
2256 printf(" cpu %d => %d", ocpu, dcpu);
2261 static int timehist_migrate_task_event(struct perf_tool *tool,
2262 union perf_event *event __maybe_unused,
2263 struct perf_evsel *evsel,
2264 struct perf_sample *sample,
2265 struct machine *machine)
2267 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2268 struct thread *thread;
2269 struct thread_runtime *tr = NULL;
2270 /* want pid of migrated task not pid in sample */
2271 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2273 thread = machine__findnew_thread(machine, 0, pid);
2277 tr = thread__get_runtime(thread);
2283 /* show migrations if requested */
2284 timehist_print_migration_event(sched, evsel, sample, machine, thread);
2289 static int timehist_sched_change_event(struct perf_tool *tool,
2290 union perf_event *event,
2291 struct perf_evsel *evsel,
2292 struct perf_sample *sample,
2293 struct machine *machine)
2295 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2296 struct perf_time_interval *ptime = &sched->ptime;
2297 struct addr_location al;
2298 struct thread *thread;
2299 struct thread_runtime *tr = NULL;
2300 u64 tprev, t = sample->time;
2303 if (machine__resolve(machine, &al, sample) < 0) {
2304 pr_err("problem processing %d event. skipping it\n",
2305 event->header.type);
2310 thread = timehist_get_thread(sched, sample, machine, evsel);
2311 if (thread == NULL) {
2316 if (timehist_skip_sample(sched, thread))
2319 tr = thread__get_runtime(thread);
2325 tprev = perf_evsel__get_time(evsel, sample->cpu);
2328 * If start time given:
2329 * - sample time is under window user cares about - skip sample
2330 * - tprev is under window user cares about - reset to start of window
2332 if (ptime->start && ptime->start > t)
2335 if (ptime->start > tprev)
2336 tprev = ptime->start;
2339 * If end time given:
2340 * - previous sched event is out of window - we are done
2341 * - sample time is beyond window user cares about - reset it
2342 * to close out stats for time window interest
2345 if (tprev > ptime->end)
2352 timehist_update_runtime_stats(tr, t, tprev);
2354 if (!sched->summary_only)
2355 timehist_print_sample(sched, sample, &al, thread, t);
2359 /* time of this sched_switch event becomes last time task seen */
2360 tr->last_time = sample->time;
2362 /* sched out event for task so reset ready to run time */
2363 tr->ready_to_run = 0;
2366 perf_evsel__save_time(evsel, sample->time, sample->cpu);
2371 static int timehist_sched_switch_event(struct perf_tool *tool,
2372 union perf_event *event,
2373 struct perf_evsel *evsel,
2374 struct perf_sample *sample,
2375 struct machine *machine __maybe_unused)
2377 return timehist_sched_change_event(tool, event, evsel, sample, machine);
2380 static int process_lost(struct perf_tool *tool __maybe_unused,
2381 union perf_event *event,
2382 struct perf_sample *sample,
2383 struct machine *machine __maybe_unused)
2387 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2388 printf("%15s ", tstr);
2389 printf("lost %" PRIu64 " events on cpu %d\n", event->lost.lost, sample->cpu);
2395 static void print_thread_runtime(struct thread *t,
2396 struct thread_runtime *r)
2398 double mean = avg_stats(&r->run_stats);
2401 printf("%*s %5d %9" PRIu64 " ",
2402 comm_width, timehist_get_commstr(t), t->ppid,
2403 (u64) r->run_stats.n);
2405 print_sched_time(r->total_run_time, 8);
2406 stddev = rel_stddev_stats(stddev_stats(&r->run_stats), mean);
2407 print_sched_time(r->run_stats.min, 6);
2409 print_sched_time((u64) mean, 6);
2411 print_sched_time(r->run_stats.max, 6);
2413 printf("%5.2f", stddev);
2414 printf(" %5" PRIu64, r->migrations);
2418 struct total_run_stats {
2424 static int __show_thread_runtime(struct thread *t, void *priv)
2426 struct total_run_stats *stats = priv;
2427 struct thread_runtime *r;
2429 if (thread__is_filtered(t))
2432 r = thread__priv(t);
2433 if (r && r->run_stats.n) {
2434 stats->task_count++;
2435 stats->sched_count += r->run_stats.n;
2436 stats->total_run_time += r->total_run_time;
2437 print_thread_runtime(t, r);
2443 static int show_thread_runtime(struct thread *t, void *priv)
2448 return __show_thread_runtime(t, priv);
2451 static int show_deadthread_runtime(struct thread *t, void *priv)
2456 return __show_thread_runtime(t, priv);
2459 static void timehist_print_summary(struct perf_sched *sched,
2460 struct perf_session *session)
2462 struct machine *m = &session->machines.host;
2463 struct total_run_stats totals;
2466 struct thread_runtime *r;
2469 memset(&totals, 0, sizeof(totals));
2471 if (comm_width < 30)
2474 printf("\nRuntime summary\n");
2475 printf("%*s parent sched-in ", comm_width, "comm");
2476 printf(" run-time min-run avg-run max-run stddev migrations\n");
2477 printf("%*s (count) ", comm_width, "");
2478 printf(" (msec) (msec) (msec) (msec) %%\n");
2479 printf("%.117s\n", graph_dotted_line);
2481 machine__for_each_thread(m, show_thread_runtime, &totals);
2482 task_count = totals.task_count;
2484 printf("<no still running tasks>\n");
2486 printf("\nTerminated tasks:\n");
2487 machine__for_each_thread(m, show_deadthread_runtime, &totals);
2488 if (task_count == totals.task_count)
2489 printf("<no terminated tasks>\n");
2491 /* CPU idle stats not tracked when samples were skipped */
2492 if (sched->skipped_samples)
2495 printf("\nIdle stats:\n");
2496 for (i = 0; i <= idle_max_cpu; ++i) {
2497 t = idle_threads[i];
2501 r = thread__priv(t);
2502 if (r && r->run_stats.n) {
2503 totals.sched_count += r->run_stats.n;
2504 printf(" CPU %2d idle for ", i);
2505 print_sched_time(r->total_run_time, 6);
2508 printf(" CPU %2d idle entire time window\n", i);
2512 " Total number of unique tasks: %" PRIu64 "\n"
2513 "Total number of context switches: %" PRIu64 "\n"
2514 " Total run time (msec): ",
2515 totals.task_count, totals.sched_count);
2517 print_sched_time(totals.total_run_time, 2);
2521 typedef int (*sched_handler)(struct perf_tool *tool,
2522 union perf_event *event,
2523 struct perf_evsel *evsel,
2524 struct perf_sample *sample,
2525 struct machine *machine);
2527 static int perf_timehist__process_sample(struct perf_tool *tool,
2528 union perf_event *event,
2529 struct perf_sample *sample,
2530 struct perf_evsel *evsel,
2531 struct machine *machine)
2533 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2535 int this_cpu = sample->cpu;
2537 if (this_cpu > sched->max_cpu)
2538 sched->max_cpu = this_cpu;
2540 if (evsel->handler != NULL) {
2541 sched_handler f = evsel->handler;
2543 err = f(tool, event, evsel, sample, machine);
2549 static int timehist_check_attr(struct perf_sched *sched,
2550 struct perf_evlist *evlist)
2552 struct perf_evsel *evsel;
2553 struct evsel_runtime *er;
2555 list_for_each_entry(evsel, &evlist->entries, node) {
2556 er = perf_evsel__get_runtime(evsel);
2558 pr_err("Failed to allocate memory for evsel runtime data\n");
2562 if (sched->show_callchain &&
2563 !(evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN)) {
2564 pr_info("Samples do not have callchains.\n");
2565 sched->show_callchain = 0;
2566 symbol_conf.use_callchain = 0;
2573 static int perf_sched__timehist(struct perf_sched *sched)
2575 const struct perf_evsel_str_handler handlers[] = {
2576 { "sched:sched_switch", timehist_sched_switch_event, },
2577 { "sched:sched_wakeup", timehist_sched_wakeup_event, },
2578 { "sched:sched_wakeup_new", timehist_sched_wakeup_event, },
2580 const struct perf_evsel_str_handler migrate_handlers[] = {
2581 { "sched:sched_migrate_task", timehist_migrate_task_event, },
2583 struct perf_data_file file = {
2585 .mode = PERF_DATA_MODE_READ,
2586 .force = sched->force,
2589 struct perf_session *session;
2590 struct perf_evlist *evlist;
2594 * event handlers for timehist option
2596 sched->tool.sample = perf_timehist__process_sample;
2597 sched->tool.mmap = perf_event__process_mmap;
2598 sched->tool.comm = perf_event__process_comm;
2599 sched->tool.exit = perf_event__process_exit;
2600 sched->tool.fork = perf_event__process_fork;
2601 sched->tool.lost = process_lost;
2602 sched->tool.attr = perf_event__process_attr;
2603 sched->tool.tracing_data = perf_event__process_tracing_data;
2604 sched->tool.build_id = perf_event__process_build_id;
2606 sched->tool.ordered_events = true;
2607 sched->tool.ordering_requires_timestamps = true;
2609 symbol_conf.use_callchain = sched->show_callchain;
2611 session = perf_session__new(&file, false, &sched->tool);
2612 if (session == NULL)
2615 evlist = session->evlist;
2617 symbol__init(&session->header.env);
2619 if (perf_time__parse_str(&sched->ptime, sched->time_str) != 0) {
2620 pr_err("Invalid time string\n");
2624 if (timehist_check_attr(sched, evlist) != 0)
2629 /* setup per-evsel handlers */
2630 if (perf_session__set_tracepoints_handlers(session, handlers))
2633 /* sched_switch event at a minimum needs to exist */
2634 if (!perf_evlist__find_tracepoint_by_name(session->evlist,
2635 "sched:sched_switch")) {
2636 pr_err("No sched_switch events found. Have you run 'perf sched record'?\n");
2640 if (sched->show_migrations &&
2641 perf_session__set_tracepoints_handlers(session, migrate_handlers))
2644 /* pre-allocate struct for per-CPU idle stats */
2645 sched->max_cpu = session->header.env.nr_cpus_online;
2646 if (sched->max_cpu == 0)
2648 if (init_idle_threads(sched->max_cpu))
2651 /* summary_only implies summary option, but don't overwrite summary if set */
2652 if (sched->summary_only)
2653 sched->summary = sched->summary_only;
2655 if (!sched->summary_only)
2656 timehist_header(sched);
2658 err = perf_session__process_events(session);
2660 pr_err("Failed to process events, error %d", err);
2664 sched->nr_events = evlist->stats.nr_events[0];
2665 sched->nr_lost_events = evlist->stats.total_lost;
2666 sched->nr_lost_chunks = evlist->stats.nr_events[PERF_RECORD_LOST];
2669 timehist_print_summary(sched, session);
2672 free_idle_threads();
2673 perf_session__delete(session);
2679 static void print_bad_events(struct perf_sched *sched)
2681 if (sched->nr_unordered_timestamps && sched->nr_timestamps) {
2682 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
2683 (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0,
2684 sched->nr_unordered_timestamps, sched->nr_timestamps);
2686 if (sched->nr_lost_events && sched->nr_events) {
2687 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
2688 (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
2689 sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
2691 if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
2692 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
2693 (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
2694 sched->nr_context_switch_bugs, sched->nr_timestamps);
2695 if (sched->nr_lost_events)
2696 printf(" (due to lost events?)");
2701 static void __merge_work_atoms(struct rb_root *root, struct work_atoms *data)
2703 struct rb_node **new = &(root->rb_node), *parent = NULL;
2704 struct work_atoms *this;
2705 const char *comm = thread__comm_str(data->thread), *this_comm;
2710 this = container_of(*new, struct work_atoms, node);
2713 this_comm = thread__comm_str(this->thread);
2714 cmp = strcmp(comm, this_comm);
2716 new = &((*new)->rb_left);
2717 } else if (cmp < 0) {
2718 new = &((*new)->rb_right);
2721 this->total_runtime += data->total_runtime;
2722 this->nb_atoms += data->nb_atoms;
2723 this->total_lat += data->total_lat;
2724 list_splice(&data->work_list, &this->work_list);
2725 if (this->max_lat < data->max_lat) {
2726 this->max_lat = data->max_lat;
2727 this->max_lat_at = data->max_lat_at;
2735 rb_link_node(&data->node, parent, new);
2736 rb_insert_color(&data->node, root);
2739 static void perf_sched__merge_lat(struct perf_sched *sched)
2741 struct work_atoms *data;
2742 struct rb_node *node;
2744 if (sched->skip_merge)
2747 while ((node = rb_first(&sched->atom_root))) {
2748 rb_erase(node, &sched->atom_root);
2749 data = rb_entry(node, struct work_atoms, node);
2750 __merge_work_atoms(&sched->merged_atom_root, data);
2754 static int perf_sched__lat(struct perf_sched *sched)
2756 struct rb_node *next;
2760 if (perf_sched__read_events(sched))
2763 perf_sched__merge_lat(sched);
2764 perf_sched__sort_lat(sched);
2766 printf("\n -----------------------------------------------------------------------------------------------------------------\n");
2767 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
2768 printf(" -----------------------------------------------------------------------------------------------------------------\n");
2770 next = rb_first(&sched->sorted_atom_root);
2773 struct work_atoms *work_list;
2775 work_list = rb_entry(next, struct work_atoms, node);
2776 output_lat_thread(sched, work_list);
2777 next = rb_next(next);
2778 thread__zput(work_list->thread);
2781 printf(" -----------------------------------------------------------------------------------------------------------------\n");
2782 printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n",
2783 (double)sched->all_runtime / NSEC_PER_MSEC, sched->all_count);
2785 printf(" ---------------------------------------------------\n");
2787 print_bad_events(sched);
2793 static int setup_map_cpus(struct perf_sched *sched)
2795 struct cpu_map *map;
2797 sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
2799 if (sched->map.comp) {
2800 sched->map.comp_cpus = zalloc(sched->max_cpu * sizeof(int));
2801 if (!sched->map.comp_cpus)
2805 if (!sched->map.cpus_str)
2808 map = cpu_map__new(sched->map.cpus_str);
2810 pr_err("failed to get cpus map from %s\n", sched->map.cpus_str);
2814 sched->map.cpus = map;
2818 static int setup_color_pids(struct perf_sched *sched)
2820 struct thread_map *map;
2822 if (!sched->map.color_pids_str)
2825 map = thread_map__new_by_tid_str(sched->map.color_pids_str);
2827 pr_err("failed to get thread map from %s\n", sched->map.color_pids_str);
2831 sched->map.color_pids = map;
2835 static int setup_color_cpus(struct perf_sched *sched)
2837 struct cpu_map *map;
2839 if (!sched->map.color_cpus_str)
2842 map = cpu_map__new(sched->map.color_cpus_str);
2844 pr_err("failed to get thread map from %s\n", sched->map.color_cpus_str);
2848 sched->map.color_cpus = map;
2852 static int perf_sched__map(struct perf_sched *sched)
2854 if (setup_map_cpus(sched))
2857 if (setup_color_pids(sched))
2860 if (setup_color_cpus(sched))
2864 if (perf_sched__read_events(sched))
2866 print_bad_events(sched);
2870 static int perf_sched__replay(struct perf_sched *sched)
2874 calibrate_run_measurement_overhead(sched);
2875 calibrate_sleep_measurement_overhead(sched);
2877 test_calibrations(sched);
2879 if (perf_sched__read_events(sched))
2882 printf("nr_run_events: %ld\n", sched->nr_run_events);
2883 printf("nr_sleep_events: %ld\n", sched->nr_sleep_events);
2884 printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events);
2886 if (sched->targetless_wakeups)
2887 printf("target-less wakeups: %ld\n", sched->targetless_wakeups);
2888 if (sched->multitarget_wakeups)
2889 printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups);
2890 if (sched->nr_run_events_optimized)
2891 printf("run atoms optimized: %ld\n",
2892 sched->nr_run_events_optimized);
2894 print_task_traces(sched);
2895 add_cross_task_wakeups(sched);
2897 create_tasks(sched);
2898 printf("------------------------------------------------------------\n");
2899 for (i = 0; i < sched->replay_repeat; i++)
2900 run_one_test(sched);
2905 static void setup_sorting(struct perf_sched *sched, const struct option *options,
2906 const char * const usage_msg[])
2908 char *tmp, *tok, *str = strdup(sched->sort_order);
2910 for (tok = strtok_r(str, ", ", &tmp);
2911 tok; tok = strtok_r(NULL, ", ", &tmp)) {
2912 if (sort_dimension__add(tok, &sched->sort_list) < 0) {
2913 usage_with_options_msg(usage_msg, options,
2914 "Unknown --sort key: `%s'", tok);
2920 sort_dimension__add("pid", &sched->cmp_pid);
2923 static int __cmd_record(int argc, const char **argv)
2925 unsigned int rec_argc, i, j;
2926 const char **rec_argv;
2927 const char * const record_args[] = {
2933 "-e", "sched:sched_switch",
2934 "-e", "sched:sched_stat_wait",
2935 "-e", "sched:sched_stat_sleep",
2936 "-e", "sched:sched_stat_iowait",
2937 "-e", "sched:sched_stat_runtime",
2938 "-e", "sched:sched_process_fork",
2939 "-e", "sched:sched_wakeup",
2940 "-e", "sched:sched_wakeup_new",
2941 "-e", "sched:sched_migrate_task",
2944 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
2945 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2947 if (rec_argv == NULL)
2950 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2951 rec_argv[i] = strdup(record_args[i]);
2953 for (j = 1; j < (unsigned int)argc; j++, i++)
2954 rec_argv[i] = argv[j];
2956 BUG_ON(i != rec_argc);
2958 return cmd_record(i, rec_argv, NULL);
2961 int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
2963 const char default_sort_order[] = "avg, max, switch, runtime";
2964 struct perf_sched sched = {
2966 .sample = perf_sched__process_tracepoint_sample,
2967 .comm = perf_event__process_comm,
2968 .lost = perf_event__process_lost,
2969 .fork = perf_sched__process_fork_event,
2970 .ordered_events = true,
2972 .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid),
2973 .sort_list = LIST_HEAD_INIT(sched.sort_list),
2974 .start_work_mutex = PTHREAD_MUTEX_INITIALIZER,
2975 .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER,
2976 .sort_order = default_sort_order,
2977 .replay_repeat = 10,
2979 .next_shortname1 = 'A',
2980 .next_shortname2 = '0',
2982 .show_callchain = 1,
2985 const struct option sched_options[] = {
2986 OPT_STRING('i', "input", &input_name, "file",
2988 OPT_INCR('v', "verbose", &verbose,
2989 "be more verbose (show symbol address, etc)"),
2990 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
2991 "dump raw trace in ASCII"),
2992 OPT_BOOLEAN('f', "force", &sched.force, "don't complain, do it"),
2995 const struct option latency_options[] = {
2996 OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]",
2997 "sort by key(s): runtime, switch, avg, max"),
2998 OPT_INTEGER('C', "CPU", &sched.profile_cpu,
2999 "CPU to profile on"),
3000 OPT_BOOLEAN('p', "pids", &sched.skip_merge,
3001 "latency stats per pid instead of per comm"),
3002 OPT_PARENT(sched_options)
3004 const struct option replay_options[] = {
3005 OPT_UINTEGER('r', "repeat", &sched.replay_repeat,
3006 "repeat the workload replay N times (-1: infinite)"),
3007 OPT_PARENT(sched_options)
3009 const struct option map_options[] = {
3010 OPT_BOOLEAN(0, "compact", &sched.map.comp,
3011 "map output in compact mode"),
3012 OPT_STRING(0, "color-pids", &sched.map.color_pids_str, "pids",
3013 "highlight given pids in map"),
3014 OPT_STRING(0, "color-cpus", &sched.map.color_cpus_str, "cpus",
3015 "highlight given CPUs in map"),
3016 OPT_STRING(0, "cpus", &sched.map.cpus_str, "cpus",
3017 "display given CPUs in map"),
3018 OPT_PARENT(sched_options)
3020 const struct option timehist_options[] = {
3021 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
3022 "file", "vmlinux pathname"),
3023 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
3024 "file", "kallsyms pathname"),
3025 OPT_BOOLEAN('g', "call-graph", &sched.show_callchain,
3026 "Display call chains if present (default on)"),
3027 OPT_UINTEGER(0, "max-stack", &sched.max_stack,
3028 "Maximum number of functions to display backtrace."),
3029 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
3030 "Look for files with symbols relative to this directory"),
3031 OPT_BOOLEAN('s', "summary", &sched.summary_only,
3032 "Show only syscall summary with statistics"),
3033 OPT_BOOLEAN('S', "with-summary", &sched.summary,
3034 "Show all syscalls and summary with statistics"),
3035 OPT_BOOLEAN('w', "wakeups", &sched.show_wakeups, "Show wakeup events"),
3036 OPT_BOOLEAN('M', "migrations", &sched.show_migrations, "Show migration events"),
3037 OPT_BOOLEAN('V', "cpu-visual", &sched.show_cpu_visual, "Add CPU visual"),
3038 OPT_STRING(0, "time", &sched.time_str, "str",
3039 "Time span for analysis (start,stop)"),
3040 OPT_PARENT(sched_options)
3043 const char * const latency_usage[] = {
3044 "perf sched latency [<options>]",
3047 const char * const replay_usage[] = {
3048 "perf sched replay [<options>]",
3051 const char * const map_usage[] = {
3052 "perf sched map [<options>]",
3055 const char * const timehist_usage[] = {
3056 "perf sched timehist [<options>]",
3059 const char *const sched_subcommands[] = { "record", "latency", "map",
3062 const char *sched_usage[] = {
3066 struct trace_sched_handler lat_ops = {
3067 .wakeup_event = latency_wakeup_event,
3068 .switch_event = latency_switch_event,
3069 .runtime_event = latency_runtime_event,
3070 .migrate_task_event = latency_migrate_task_event,
3072 struct trace_sched_handler map_ops = {
3073 .switch_event = map_switch_event,
3075 struct trace_sched_handler replay_ops = {
3076 .wakeup_event = replay_wakeup_event,
3077 .switch_event = replay_switch_event,
3078 .fork_event = replay_fork_event,
3082 for (i = 0; i < ARRAY_SIZE(sched.curr_pid); i++)
3083 sched.curr_pid[i] = -1;
3085 argc = parse_options_subcommand(argc, argv, sched_options, sched_subcommands,
3086 sched_usage, PARSE_OPT_STOP_AT_NON_OPTION);
3088 usage_with_options(sched_usage, sched_options);
3091 * Aliased to 'perf script' for now:
3093 if (!strcmp(argv[0], "script"))
3094 return cmd_script(argc, argv, prefix);
3096 if (!strncmp(argv[0], "rec", 3)) {
3097 return __cmd_record(argc, argv);
3098 } else if (!strncmp(argv[0], "lat", 3)) {
3099 sched.tp_handler = &lat_ops;
3101 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
3103 usage_with_options(latency_usage, latency_options);
3105 setup_sorting(&sched, latency_options, latency_usage);
3106 return perf_sched__lat(&sched);
3107 } else if (!strcmp(argv[0], "map")) {
3109 argc = parse_options(argc, argv, map_options, map_usage, 0);
3111 usage_with_options(map_usage, map_options);
3113 sched.tp_handler = &map_ops;
3114 setup_sorting(&sched, latency_options, latency_usage);
3115 return perf_sched__map(&sched);
3116 } else if (!strncmp(argv[0], "rep", 3)) {
3117 sched.tp_handler = &replay_ops;
3119 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
3121 usage_with_options(replay_usage, replay_options);
3123 return perf_sched__replay(&sched);
3124 } else if (!strcmp(argv[0], "timehist")) {
3126 argc = parse_options(argc, argv, timehist_options,
3129 usage_with_options(timehist_usage, timehist_options);
3131 if (sched.show_wakeups && sched.summary_only) {
3132 pr_err(" Error: -s and -w are mutually exclusive.\n");
3133 parse_options_usage(timehist_usage, timehist_options, "s", true);
3134 parse_options_usage(NULL, timehist_options, "w", true);
3138 return perf_sched__timehist(&sched);
3140 usage_with_options(sched_usage, sched_options);