]> git.ipfire.org Git - thirdparty/linux.git/blame - tools/perf/builtin-sched.c
projects / thirdparty / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
tcp: add tcp_min_snd_mss sysctl
[thirdparty/linux.git] / tools / perf / builtin-sched.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
0a02ad93 2#include "builtin.h"
b1ffe8f3 3#include "perf.h"
0a02ad93
IM		 4
5#include "util/util.h"
ee29be62 6#include "util/evlist.h"
0a02ad93 7#include "util/cache.h"
e3f42609 8#include "util/evsel.h"
0a02ad93
IM		 9#include "util/symbol.h"
10#include "util/thread.h"
11#include "util/header.h"
94c744b6 12#include "util/session.h"
45694aa7 13#include "util/tool.h"
57480d2c 14#include "util/cloexec.h"
a151a37a 15#include "util/thread_map.h"
8cd91195 16#include "util/color.h"
49394a2a 17#include "util/stat.h"
6c973c90 18#include "util/callchain.h"
853b7407 19#include "util/time-utils.h"
0a02ad93 20
4b6ab94e 21#include <subcmd/parse-options.h>
b1ffe8f3 22#include "util/trace-event.h"
0a02ad93 23
0a02ad93
IM		 24#include "util/debug.h"
25
877a7a11 26#include <linux/kernel.h>
49394a2a 27#include <linux/log2.h>
b1ffe8f3 28#include <sys/prctl.h>
7b78f136 29#include <sys/resource.h>
fd20e811 30#include <inttypes.h>
0a02ad93 31
a43783ae 32#include <errno.h>
b1ffe8f3
IM		 33#include <semaphore.h>
34#include <pthread.h>
35#include <math.h>
cb06ac25 36#include <api/fs/fs.h>
4fc76e49 37#include <linux/time64.h>
419ab0d6 38
3d689ed6
ACM		 39#include "sane_ctype.h"
40
b1ffe8f3
IM		 41#define PR_SET_NAME 15 /* Set process name */
42#define MAX_CPUS 4096
b1ffe8f3
IM		 43#define COMM_LEN 20
44#define SYM_LEN 129
a35e27d0 45#define MAX_PID 1024000
ec156764 46
39aeb52f 47struct sched_atom;
ec156764 48
b1ffe8f3
IM		 49struct task_desc {
50 unsigned long nr;
51 unsigned long pid;
52 char comm[COMM_LEN];
ec156764 53
b1ffe8f3
IM		 54 unsigned long nr_events;
55 unsigned long curr_event;
39aeb52f 56 struct sched_atom **atoms;
b1ffe8f3
IM		 57
58 pthread_t thread;
59 sem_t sleep_sem;
ec156764 60
b1ffe8f3
IM		 61 sem_t ready_for_work;
62 sem_t work_done_sem;
63
64 u64 cpu_usage;
65};
66
67enum sched_event_type {
68 SCHED_EVENT_RUN,
69 SCHED_EVENT_SLEEP,
70 SCHED_EVENT_WAKEUP,
55ffb7a6 71 SCHED_EVENT_MIGRATION,
b1ffe8f3
IM		 72};
73
39aeb52f 74struct sched_atom {
b1ffe8f3 75 enum sched_event_type type;
eed05fe7 76 int specific_wait;
b1ffe8f3
IM		 77 u64 timestamp;
78 u64 duration;
79 unsigned long nr;
b1ffe8f3
IM		 80 sem_t *wait_sem;
81 struct task_desc *wakee;
82};
83
e936e8e4 84#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP"
b1ffe8f3 85
941bdea7
NK		 86/* task state bitmask, copied from include/linux/sched.h */
87#define TASK_RUNNING 0
88#define TASK_INTERRUPTIBLE 1
89#define TASK_UNINTERRUPTIBLE 2
90#define __TASK_STOPPED 4
91#define __TASK_TRACED 8
92/* in tsk->exit_state */
93#define EXIT_DEAD 16
94#define EXIT_ZOMBIE 32
95#define EXIT_TRACE (EXIT_ZOMBIE | EXIT_DEAD)
96/* in tsk->state again */
97#define TASK_DEAD 64
98#define TASK_WAKEKILL 128
99#define TASK_WAKING 256
100#define TASK_PARKED 512
101
b1ffe8f3
IM		 102enum thread_state {
103 THREAD_SLEEPING = 0,
104 THREAD_WAIT_CPU,
105 THREAD_SCHED_IN,
106 THREAD_IGNORE
107};
108
109struct work_atom {
110 struct list_head list;
111 enum thread_state state;
aa1ab9d2 112 u64 sched_out_time;
b1ffe8f3
IM		 113 u64 wake_up_time;
114 u64 sched_in_time;
115 u64 runtime;
116};
117
39aeb52f 118struct work_atoms {
119 struct list_head work_list;
b1ffe8f3
IM		 120 struct thread *thread;
121 struct rb_node node;
122 u64 max_lat;
3786310a 123 u64 max_lat_at;
b1ffe8f3
IM		 124 u64 total_lat;
125 u64 nb_atoms;
126 u64 total_runtime;
2f80dd44 127 int num_merged;
b1ffe8f3
IM		 128};
129
39aeb52f 130typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
b1ffe8f3 131
9ec3f4e4 132struct perf_sched;
0e9b07e5 133
9ec3f4e4
ACM		 134struct trace_sched_handler {
135 int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
136 struct perf_sample *sample, struct machine *machine);
0e9b07e5 137
9ec3f4e4
ACM		 138 int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
139 struct perf_sample *sample, struct machine *machine);
0e9b07e5 140
9ec3f4e4
ACM		 141 int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
142 struct perf_sample *sample, struct machine *machine);
0e9b07e5 143
cb627505
DA		 144 /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */
145 int (*fork_event)(struct perf_sched *sched, union perf_event *event,
146 struct machine *machine);
0e9b07e5
ACM		 147
148 int (*migrate_task_event)(struct perf_sched *sched,
9ec3f4e4
ACM		 149 struct perf_evsel *evsel,
150 struct perf_sample *sample,
151 struct machine *machine);
0e9b07e5
ACM		 152};
153
a151a37a 154#define COLOR_PIDS PERF_COLOR_BLUE
cf294f24 155#define COLOR_CPUS PERF_COLOR_BG_RED
a151a37a 156
99623c62
JO		 157struct perf_sched_map {
158 DECLARE_BITMAP(comp_cpus_mask, MAX_CPUS);
159 int *comp_cpus;
160 bool comp;
a151a37a
JO		 161 struct thread_map *color_pids;
162 const char *color_pids_str;
cf294f24
JO		 163 struct cpu_map *color_cpus;
164 const char *color_cpus_str;
73643bb6
JO		 165 struct cpu_map *cpus;
166 const char *cpus_str;
99623c62
JO		 167};
168
0e9b07e5
ACM		 169struct perf_sched {
170 struct perf_tool tool;
0e9b07e5
ACM		 171 const char *sort_order;
172 unsigned long nr_tasks;
cb06ac25 173 struct task_desc **pid_to_task;
0e9b07e5
ACM		 174 struct task_desc **tasks;
175 const struct trace_sched_handler *tp_handler;
176 pthread_mutex_t start_work_mutex;
177 pthread_mutex_t work_done_wait_mutex;
178 int profile_cpu;
179/*
180 * Track the current task - that way we can know whether there's any
181 * weird events, such as a task being switched away that is not current.
182 */
183 int max_cpu;
184 u32 curr_pid[MAX_CPUS];
185 struct thread *curr_thread[MAX_CPUS];
186 char next_shortname1;
187 char next_shortname2;
188 unsigned int replay_repeat;
189 unsigned long nr_run_events;
190 unsigned long nr_sleep_events;
191 unsigned long nr_wakeup_events;
192 unsigned long nr_sleep_corrections;
193 unsigned long nr_run_events_optimized;
194 unsigned long targetless_wakeups;
195 unsigned long multitarget_wakeups;
196 unsigned long nr_runs;
197 unsigned long nr_timestamps;
198 unsigned long nr_unordered_timestamps;
0e9b07e5
ACM		 199 unsigned long nr_context_switch_bugs;
200 unsigned long nr_events;
201 unsigned long nr_lost_chunks;
202 unsigned long nr_lost_events;
203 u64 run_measurement_overhead;
204 u64 sleep_measurement_overhead;
205 u64 start_time;
206 u64 cpu_usage;
207 u64 runavg_cpu_usage;
208 u64 parent_cpu_usage;
209 u64 runavg_parent_cpu_usage;
210 u64 sum_runtime;
211 u64 sum_fluct;
212 u64 run_avg;
213 u64 all_runtime;
214 u64 all_count;
215 u64 cpu_last_switched[MAX_CPUS];
cb4c13a5 216 struct rb_root_cached atom_root, sorted_atom_root, merged_atom_root;
0e9b07e5 217 struct list_head sort_list, cmp_pid;
939cda52 218 bool force;
2f80dd44 219 bool skip_merge;
99623c62 220 struct perf_sched_map map;
52df138c
DA		 221
222 /* options for timehist command */
223 bool summary;
224 bool summary_only;
699b5b92 225 bool idle_hist;
6c973c90
DA		 226 bool show_callchain;
227 unsigned int max_stack;
a407b067 228 bool show_cpu_visual;
fc1469f1 229 bool show_wakeups;
292c4a8f 230 bool show_next;
350f54fa 231 bool show_migrations;
414e050c 232 bool show_state;
52df138c 233 u64 skipped_samples;
853b7407
DA		 234 const char *time_str;
235 struct perf_time_interval ptime;
9396c9cb 236 struct perf_time_interval hist_time;
0e9b07e5 237};
b1ffe8f3 238
49394a2a
DA		 239/* per thread run time data */
240struct thread_runtime {
241 u64 last_time; /* time of previous sched in/out event */
242 u64 dt_run; /* run time */
941bdea7
NK		 243 u64 dt_sleep; /* time between CPU access by sleep (off cpu) */
244 u64 dt_iowait; /* time between CPU access by iowait (off cpu) */
245 u64 dt_preempt; /* time between CPU access by preempt (off cpu) */
49394a2a
DA		 246 u64 dt_delay; /* time between wakeup and sched-in */
247 u64 ready_to_run; /* time of wakeup */
248
249 struct stats run_stats;
250 u64 total_run_time;
587782c5
NK		 251 u64 total_sleep_time;
252 u64 total_iowait_time;
253 u64 total_preempt_time;
254 u64 total_delay_time;
350f54fa 255
941bdea7 256 int last_state;
8640da9f
CD		 257
258 char shortname[3];
99a3c3a9
CD		 259 bool comm_changed;
260
350f54fa 261 u64 migrations;
49394a2a
DA		 262};
263
264/* per event run time data */
265struct evsel_runtime {
266 u64 *last_time; /* time this event was last seen per cpu */
267 u32 ncpu; /* highest cpu slot allocated */
268};
269
3bc2fa9c
NK		 270/* per cpu idle time data */
271struct idle_thread_runtime {
272 struct thread_runtime tr;
273 struct thread *last_thread;
cb4c13a5 274 struct rb_root_cached sorted_root;
3bc2fa9c
NK		 275 struct callchain_root callchain;
276 struct callchain_cursor cursor;
277};
278
49394a2a
DA		 279/* track idle times per cpu */
280static struct thread **idle_threads;
281static int idle_max_cpu;
282static char idle_comm[] = "<idle>";
283
b1ffe8f3 284static u64 get_nsecs(void)
ec156764
IM		 285{
286 struct timespec ts;
287
288 clock_gettime(CLOCK_MONOTONIC, &ts);
289
4fc76e49 290 return ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec;
ec156764
IM		 291}
292
0e9b07e5 293static void burn_nsecs(struct perf_sched *sched, u64 nsecs)
ec156764 294{
b1ffe8f3 295 u64 T0 = get_nsecs(), T1;
ec156764
IM		 296
297 do {
298 T1 = get_nsecs();
0e9b07e5 299 } while (T1 + sched->run_measurement_overhead < T0 + nsecs);
ec156764
IM		 300}
301
b1ffe8f3 302static void sleep_nsecs(u64 nsecs)
ec156764
IM		 303{
304 struct timespec ts;
305
306 ts.tv_nsec = nsecs % 999999999;
307 ts.tv_sec = nsecs / 999999999;
308
309 nanosleep(&ts, NULL);
310}
311
0e9b07e5 312static void calibrate_run_measurement_overhead(struct perf_sched *sched)
ec156764 313{
4fc76e49 314 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
ec156764
IM		 315 int i;
316
317 for (i = 0; i < 10; i++) {
318 T0 = get_nsecs();
0e9b07e5 319 burn_nsecs(sched, 0);
ec156764
IM		 320 T1 = get_nsecs();
321 delta = T1-T0;
322 min_delta = min(min_delta, delta);
323 }
0e9b07e5 324 sched->run_measurement_overhead = min_delta;
ec156764 325
9486aa38 326 printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
ec156764
IM		 327}
328
0e9b07e5 329static void calibrate_sleep_measurement_overhead(struct perf_sched *sched)
ec156764 330{
4fc76e49 331 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
ec156764
IM		 332 int i;
333
334 for (i = 0; i < 10; i++) {
335 T0 = get_nsecs();
336 sleep_nsecs(10000);
337 T1 = get_nsecs();
338 delta = T1-T0;
339 min_delta = min(min_delta, delta);
340 }
341 min_delta -= 10000;
0e9b07e5 342 sched->sleep_measurement_overhead = min_delta;
ec156764 343
9486aa38 344 printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
ec156764
IM		 345}
346
39aeb52f 347static struct sched_atom *
b1ffe8f3 348get_new_event(struct task_desc *task, u64 timestamp)
ec156764 349{
36479484 350 struct sched_atom *event = zalloc(sizeof(*event));
ec156764
IM		 351 unsigned long idx = task->nr_events;
352 size_t size;
353
354 event->timestamp = timestamp;
355 event->nr = idx;
356
357 task->nr_events++;
39aeb52f 358 size = sizeof(struct sched_atom *) * task->nr_events;
359 task->atoms = realloc(task->atoms, size);
360 BUG_ON(!task->atoms);
ec156764 361
39aeb52f 362 task->atoms[idx] = event;
ec156764
IM		 363
364 return event;
365}
366
39aeb52f 367static struct sched_atom *last_event(struct task_desc *task)
ec156764
IM		 368{
369 if (!task->nr_events)
370 return NULL;
371
39aeb52f 372 return task->atoms[task->nr_events - 1];
ec156764
IM		 373}
374
0e9b07e5
ACM		 375static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task,
376 u64 timestamp, u64 duration)
ec156764 377{
39aeb52f 378 struct sched_atom *event, *curr_event = last_event(task);
ec156764
IM		 379
380 /*
fbf94829
IM		 381 * optimize an existing RUN event by merging this one
382 * to it:
383 */
ec156764 384 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
0e9b07e5 385 sched->nr_run_events_optimized++;
ec156764
IM		 386 curr_event->duration += duration;
387 return;
388 }
389
390 event = get_new_event(task, timestamp);
391
392 event->type = SCHED_EVENT_RUN;
393 event->duration = duration;
394
0e9b07e5 395 sched->nr_run_events++;
ec156764
IM		 396}
397
0e9b07e5
ACM		 398static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task,
399 u64 timestamp, struct task_desc *wakee)
ec156764 400{
39aeb52f 401 struct sched_atom *event, *wakee_event;
ec156764
IM		 402
403 event = get_new_event(task, timestamp);
404 event->type = SCHED_EVENT_WAKEUP;
405 event->wakee = wakee;
406
407 wakee_event = last_event(wakee);
408 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
0e9b07e5 409 sched->targetless_wakeups++;
ec156764
IM		 410 return;
411 }
412 if (wakee_event->wait_sem) {
0e9b07e5 413 sched->multitarget_wakeups++;
ec156764
IM		 414 return;
415 }
416
36479484 417 wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
ec156764
IM		 418 sem_init(wakee_event->wait_sem, 0, 0);
419 wakee_event->specific_wait = 1;
420 event->wait_sem = wakee_event->wait_sem;
421
0e9b07e5 422 sched->nr_wakeup_events++;
ec156764
IM		 423}
424
0e9b07e5
ACM		 425static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task,
426 u64 timestamp, u64 task_state __maybe_unused)
ec156764 427{
39aeb52f 428 struct sched_atom *event = get_new_event(task, timestamp);
ec156764
IM		 429
430 event->type = SCHED_EVENT_SLEEP;
431
0e9b07e5 432 sched->nr_sleep_events++;
ec156764
IM		 433}
434
0e9b07e5
ACM		 435static struct task_desc *register_pid(struct perf_sched *sched,
436 unsigned long pid, const char *comm)
ec156764
IM		 437{
438 struct task_desc *task;
cb06ac25 439 static int pid_max;
ec156764 440
cb06ac25
YS		 441 if (sched->pid_to_task == NULL) {
442 if (sysctl__read_int("kernel/pid_max", &pid_max) < 0)
443 pid_max = MAX_PID;
444 BUG_ON((sched->pid_to_task = calloc(pid_max, sizeof(struct task_desc *))) == NULL);
445 }
3a423a5c
YS		 446 if (pid >= (unsigned long)pid_max) {
447 BUG_ON((sched->pid_to_task = realloc(sched->pid_to_task, (pid + 1) *
448 sizeof(struct task_desc *))) == NULL);
449 while (pid >= (unsigned long)pid_max)
450 sched->pid_to_task[pid_max++] = NULL;
451 }
ec156764 452
0e9b07e5 453 task = sched->pid_to_task[pid];
ec156764
IM		 454
455 if (task)
456 return task;
457
36479484 458 task = zalloc(sizeof(*task));
ec156764 459 task->pid = pid;
0e9b07e5 460 task->nr = sched->nr_tasks;
ec156764
IM		 461 strcpy(task->comm, comm);
462 /*
463 * every task starts in sleeping state - this gets ignored
464 * if there's no wakeup pointing to this sleep state:
465 */
0e9b07e5 466 add_sched_event_sleep(sched, task, 0, 0);
ec156764 467
0e9b07e5
ACM		 468 sched->pid_to_task[pid] = task;
469 sched->nr_tasks++;
0755bc4d 470 sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_desc *));
0e9b07e5
ACM		 471 BUG_ON(!sched->tasks);
472 sched->tasks[task->nr] = task;
ec156764 473
bb963e16 474 if (verbose > 0)
0e9b07e5 475 printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
ec156764
IM		 476
477 return task;
478}
479
480
0e9b07e5 481static void print_task_traces(struct perf_sched *sched)
ec156764
IM		 482{
483 struct task_desc *task;
484 unsigned long i;
485
0e9b07e5
ACM		 486 for (i = 0; i < sched->nr_tasks; i++) {
487 task = sched->tasks[i];
ad236fd2 488 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
ec156764
IM		 489 task->nr, task->comm, task->pid, task->nr_events);
490 }
491}
492
0e9b07e5 493static void add_cross_task_wakeups(struct perf_sched *sched)
ec156764
IM		 494{
495 struct task_desc *task1, *task2;
496 unsigned long i, j;
497
0e9b07e5
ACM		 498 for (i = 0; i < sched->nr_tasks; i++) {
499 task1 = sched->tasks[i];
ec156764 500 j = i + 1;
0e9b07e5 501 if (j == sched->nr_tasks)
ec156764 502 j = 0;
0e9b07e5
ACM		 503 task2 = sched->tasks[j];
504 add_sched_event_wakeup(sched, task1, 0, task2);
ec156764
IM		 505 }
506}
507
0e9b07e5
ACM		 508static void perf_sched__process_event(struct perf_sched *sched,
509 struct sched_atom *atom)
ec156764
IM		 510{
511 int ret = 0;
ec156764 512
39aeb52f 513 switch (atom->type) {
ec156764 514 case SCHED_EVENT_RUN:
0e9b07e5 515 burn_nsecs(sched, atom->duration);
ec156764
IM		 516 break;
517 case SCHED_EVENT_SLEEP:
39aeb52f 518 if (atom->wait_sem)
519 ret = sem_wait(atom->wait_sem);
ec156764
IM		 520 BUG_ON(ret);
521 break;
522 case SCHED_EVENT_WAKEUP:
39aeb52f 523 if (atom->wait_sem)
524 ret = sem_post(atom->wait_sem);
ec156764
IM		 525 BUG_ON(ret);
526 break;
55ffb7a6
MG		 527 case SCHED_EVENT_MIGRATION:
528 break;
ec156764
IM		 529 default:
530 BUG_ON(1);
531 }
532}
533
b1ffe8f3 534static u64 get_cpu_usage_nsec_parent(void)
ec156764
IM		 535{
536 struct rusage ru;
b1ffe8f3 537 u64 sum;
ec156764
IM		 538 int err;
539
540 err = getrusage(RUSAGE_SELF, &ru);
541 BUG_ON(err);
542
4fc76e49
ACM		 543 sum = ru.ru_utime.tv_sec * NSEC_PER_SEC + ru.ru_utime.tv_usec * NSEC_PER_USEC;
544 sum += ru.ru_stime.tv_sec * NSEC_PER_SEC + ru.ru_stime.tv_usec * NSEC_PER_USEC;
ec156764
IM		 545
546 return sum;
547}
548
939cda52 549static int self_open_counters(struct perf_sched *sched, unsigned long cur_task)
ec156764 550{
c0c9e721 551 struct perf_event_attr attr;
939cda52 552 char sbuf[STRERR_BUFSIZE], info[STRERR_BUFSIZE];
c0c9e721 553 int fd;
939cda52
YS		 554 struct rlimit limit;
555 bool need_privilege = false;
ec156764 556
c0c9e721 557 memset(&attr, 0, sizeof(attr));
ec156764 558
c0c9e721
XG		 559 attr.type = PERF_TYPE_SOFTWARE;
560 attr.config = PERF_COUNT_SW_TASK_CLOCK;
ec156764 561
939cda52 562force_again:
57480d2c
YD		 563 fd = sys_perf_event_open(&attr, 0, -1, -1,
564 perf_event_open_cloexec_flag());
c0c9e721 565
1aff59be 566 if (fd < 0) {
939cda52
YS		 567 if (errno == EMFILE) {
568 if (sched->force) {
569 BUG_ON(getrlimit(RLIMIT_NOFILE, &limit) == -1);
570 limit.rlim_cur += sched->nr_tasks - cur_task;
571 if (limit.rlim_cur > limit.rlim_max) {
572 limit.rlim_max = limit.rlim_cur;
573 need_privilege = true;
574 }
575 if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
576 if (need_privilege && errno == EPERM)
577 strcpy(info, "Need privilege\n");
578 } else
579 goto force_again;
580 } else
581 strcpy(info, "Have a try with -f option\n");
582 }
60b7d14a 583 pr_err("Error: sys_perf_event_open() syscall returned "
939cda52 584 "with %d (%s)\n%s", fd,
c8b5f2c9 585 str_error_r(errno, sbuf, sizeof(sbuf)), info);
1aff59be
YS		 586 exit(EXIT_FAILURE);
587 }
c0c9e721
XG		 588 return fd;
589}
590
591static u64 get_cpu_usage_nsec_self(int fd)
592{
593 u64 runtime;
594 int ret;
595
596 ret = read(fd, &runtime, sizeof(runtime));
597 BUG_ON(ret != sizeof(runtime));
598
599 return runtime;
ec156764
IM		 600}
601
0e9b07e5
ACM		 602struct sched_thread_parms {
603 struct task_desc *task;
604 struct perf_sched *sched;
08097abc 605 int fd;
0e9b07e5
ACM		 606};
607
ec156764
IM		 608static void *thread_func(void *ctx)
609{
0e9b07e5
ACM		 610 struct sched_thread_parms *parms = ctx;
611 struct task_desc *this_task = parms->task;
612 struct perf_sched *sched = parms->sched;
b1ffe8f3 613 u64 cpu_usage_0, cpu_usage_1;
ec156764
IM		 614 unsigned long i, ret;
615 char comm2[22];
08097abc 616 int fd = parms->fd;
ec156764 617
74cf249d 618 zfree(&parms);
0e9b07e5 619
ec156764
IM		 620 sprintf(comm2, ":%s", this_task->comm);
621 prctl(PR_SET_NAME, comm2);
a116e05d
ACM		 622 if (fd < 0)
623 return NULL;
ec156764
IM		 624again:
625 ret = sem_post(&this_task->ready_for_work);
626 BUG_ON(ret);
0e9b07e5 627 ret = pthread_mutex_lock(&sched->start_work_mutex);
ec156764 628 BUG_ON(ret);
0e9b07e5 629 ret = pthread_mutex_unlock(&sched->start_work_mutex);
ec156764 630 BUG_ON(ret);
ec156764 631
c0c9e721 632 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
ec156764
IM		 633
634 for (i = 0; i < this_task->nr_events; i++) {
635 this_task->curr_event = i;
0e9b07e5 636 perf_sched__process_event(sched, this_task->atoms[i]);
ec156764
IM		 637 }
638
c0c9e721 639 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
ec156764 640 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
ec156764
IM		 641 ret = sem_post(&this_task->work_done_sem);
642 BUG_ON(ret);
ec156764 643
0e9b07e5 644 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
ec156764 645 BUG_ON(ret);
0e9b07e5 646 ret = pthread_mutex_unlock(&sched->work_done_wait_mutex);
ec156764 647 BUG_ON(ret);
ec156764
IM		 648
649 goto again;
650}
651
0e9b07e5 652static void create_tasks(struct perf_sched *sched)
ec156764
IM		 653{
654 struct task_desc *task;
655 pthread_attr_t attr;
656 unsigned long i;
657 int err;
658
659 err = pthread_attr_init(&attr);
660 BUG_ON(err);
12f7e036
JP		 661 err = pthread_attr_setstacksize(&attr,
662 (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
ec156764 663 BUG_ON(err);
0e9b07e5 664 err = pthread_mutex_lock(&sched->start_work_mutex);
ec156764 665 BUG_ON(err);
0e9b07e5 666 err = pthread_mutex_lock(&sched->work_done_wait_mutex);
ec156764 667 BUG_ON(err);
0e9b07e5
ACM		 668 for (i = 0; i < sched->nr_tasks; i++) {
669 struct sched_thread_parms *parms = malloc(sizeof(*parms));
670 BUG_ON(parms == NULL);
671 parms->task = task = sched->tasks[i];
672 parms->sched = sched;
939cda52 673 parms->fd = self_open_counters(sched, i);
ec156764
IM		 674 sem_init(&task->sleep_sem, 0, 0);
675 sem_init(&task->ready_for_work, 0, 0);
676 sem_init(&task->work_done_sem, 0, 0);
677 task->curr_event = 0;
0e9b07e5 678 err = pthread_create(&task->thread, &attr, thread_func, parms);
ec156764
IM		 679 BUG_ON(err);
680 }
681}
682
0e9b07e5 683static void wait_for_tasks(struct perf_sched *sched)
ec156764 684{
b1ffe8f3 685 u64 cpu_usage_0, cpu_usage_1;
ec156764
IM		 686 struct task_desc *task;
687 unsigned long i, ret;
688
0e9b07e5
ACM		 689 sched->start_time = get_nsecs();
690 sched->cpu_usage = 0;
691 pthread_mutex_unlock(&sched->work_done_wait_mutex);
ec156764 692
0e9b07e5
ACM		 693 for (i = 0; i < sched->nr_tasks; i++) {
694 task = sched->tasks[i];
ec156764
IM		 695 ret = sem_wait(&task->ready_for_work);
696 BUG_ON(ret);
697 sem_init(&task->ready_for_work, 0, 0);
698 }
0e9b07e5 699 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
ec156764
IM		 700 BUG_ON(ret);
701
702 cpu_usage_0 = get_cpu_usage_nsec_parent();
703
0e9b07e5 704 pthread_mutex_unlock(&sched->start_work_mutex);
ec156764 705
0e9b07e5
ACM		 706 for (i = 0; i < sched->nr_tasks; i++) {
707 task = sched->tasks[i];
ec156764
IM		 708 ret = sem_wait(&task->work_done_sem);
709 BUG_ON(ret);
710 sem_init(&task->work_done_sem, 0, 0);
0e9b07e5 711 sched->cpu_usage += task->cpu_usage;
ec156764
IM		 712 task->cpu_usage = 0;
713 }
714
715 cpu_usage_1 = get_cpu_usage_nsec_parent();
0e9b07e5
ACM		 716 if (!sched->runavg_cpu_usage)
717 sched->runavg_cpu_usage = sched->cpu_usage;
ff5f3bbd 718 sched->runavg_cpu_usage = (sched->runavg_cpu_usage * (sched->replay_repeat - 1) + sched->cpu_usage) / sched->replay_repeat;
ec156764 719
0e9b07e5
ACM		 720 sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
721 if (!sched->runavg_parent_cpu_usage)
722 sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
ff5f3bbd
YS		 723 sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * (sched->replay_repeat - 1) +
724 sched->parent_cpu_usage)/sched->replay_repeat;
ec156764 725
0e9b07e5 726 ret = pthread_mutex_lock(&sched->start_work_mutex);
ec156764
IM		 727 BUG_ON(ret);
728
0e9b07e5
ACM		 729 for (i = 0; i < sched->nr_tasks; i++) {
730 task = sched->tasks[i];
ec156764
IM		 731 sem_init(&task->sleep_sem, 0, 0);
732 task->curr_event = 0;
733 }
734}
735
0e9b07e5 736static void run_one_test(struct perf_sched *sched)
ec156764 737{
fb7d0b3c 738 u64 T0, T1, delta, avg_delta, fluct;
ec156764
IM		 739
740 T0 = get_nsecs();
0e9b07e5 741 wait_for_tasks(sched);
ec156764
IM		 742 T1 = get_nsecs();
743
744 delta = T1 - T0;
0e9b07e5
ACM		 745 sched->sum_runtime += delta;
746 sched->nr_runs++;
ec156764 747
0e9b07e5 748 avg_delta = sched->sum_runtime / sched->nr_runs;
ec156764
IM		 749 if (delta < avg_delta)
750 fluct = avg_delta - delta;
751 else
752 fluct = delta - avg_delta;
0e9b07e5
ACM		 753 sched->sum_fluct += fluct;
754 if (!sched->run_avg)
755 sched->run_avg = delta;
ff5f3bbd 756 sched->run_avg = (sched->run_avg * (sched->replay_repeat - 1) + delta) / sched->replay_repeat;
ec156764 757
4fc76e49 758 printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / NSEC_PER_MSEC);
ec156764 759
4fc76e49 760 printf("ravg: %0.2f, ", (double)sched->run_avg / NSEC_PER_MSEC);
ec156764 761
ad236fd2 762 printf("cpu: %0.2f / %0.2f",
4fc76e49 763 (double)sched->cpu_usage / NSEC_PER_MSEC, (double)sched->runavg_cpu_usage / NSEC_PER_MSEC);
ec156764
IM		 764
765#if 0
766 /*
fbf94829 767 * rusage statistics done by the parent, these are less
0e9b07e5 768 * accurate than the sched->sum_exec_runtime based statistics:
fbf94829 769 */
ad236fd2 770 printf(" [%0.2f / %0.2f]",
4fc76e49
ACM		 771 (double)sched->parent_cpu_usage / NSEC_PER_MSEC,
772 (double)sched->runavg_parent_cpu_usage / NSEC_PER_MSEC);
ec156764
IM		 773#endif
774
ad236fd2 775 printf("\n");
ec156764 776
0e9b07e5
ACM		 777 if (sched->nr_sleep_corrections)
778 printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections);
779 sched->nr_sleep_corrections = 0;
ec156764
IM		 780}
781
0e9b07e5 782static void test_calibrations(struct perf_sched *sched)
ec156764 783{
b1ffe8f3 784 u64 T0, T1;
ec156764
IM		 785
786 T0 = get_nsecs();
4fc76e49 787 burn_nsecs(sched, NSEC_PER_MSEC);
ec156764
IM		 788 T1 = get_nsecs();
789
9486aa38 790 printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
ec156764
IM		 791
792 T0 = get_nsecs();
4fc76e49 793 sleep_nsecs(NSEC_PER_MSEC);
ec156764
IM		 794 T1 = get_nsecs();
795
9486aa38 796 printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
ec156764
IM		 797}
798
a116e05d 799static int
0e9b07e5 800replay_wakeup_event(struct perf_sched *sched,
9ec3f4e4
ACM		 801 struct perf_evsel *evsel, struct perf_sample *sample,
802 struct machine *machine __maybe_unused)
419ab0d6 803{
9ec3f4e4
ACM		 804 const char *comm = perf_evsel__strval(evsel, sample, "comm");
805 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
419ab0d6 806 struct task_desc *waker, *wakee;
fbf94829 807
bb963e16 808 if (verbose > 0) {
2b7fcbc5 809 printf("sched_wakeup event %p\n", evsel);
fbf94829 810
9ec3f4e4 811 printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
ad236fd2 812 }
fbf94829 813
2b7fcbc5 814 waker = register_pid(sched, sample->tid, "<unknown>");
9ec3f4e4 815 wakee = register_pid(sched, pid, comm);
fbf94829 816
0e9b07e5 817 add_sched_event_wakeup(sched, waker, sample->time, wakee);
a116e05d 818 return 0;
ec156764
IM		 819}
820
9ec3f4e4
ACM		 821static int replay_switch_event(struct perf_sched *sched,
822 struct perf_evsel *evsel,
823 struct perf_sample *sample,
824 struct machine *machine __maybe_unused)
ec156764 825{
9ec3f4e4
ACM		 826 const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
827 *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
828 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
829 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
830 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
1d037ca1 831 struct task_desc *prev, __maybe_unused *next;
7f7f8d0b
ACM		 832 u64 timestamp0, timestamp = sample->time;
833 int cpu = sample->cpu;
fbf94829
IM		 834 s64 delta;
835
bb963e16 836 if (verbose > 0)
2b7fcbc5 837 printf("sched_switch event %p\n", evsel);
ad236fd2 838
fbf94829 839 if (cpu >= MAX_CPUS || cpu < 0)
a116e05d 840 return 0;
fbf94829 841
0e9b07e5 842 timestamp0 = sched->cpu_last_switched[cpu];
fbf94829
IM		 843 if (timestamp0)
844 delta = timestamp - timestamp0;
845 else
846 delta = 0;
847
a116e05d 848 if (delta < 0) {
60b7d14a 849 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
a116e05d
ACM		 850 return -1;
851 }
fbf94829 852
9ec3f4e4
ACM		 853 pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
854 prev_comm, prev_pid, next_comm, next_pid, delta);
fbf94829 855
9ec3f4e4
ACM		 856 prev = register_pid(sched, prev_pid, prev_comm);
857 next = register_pid(sched, next_pid, next_comm);
fbf94829 858
0e9b07e5 859 sched->cpu_last_switched[cpu] = timestamp;
fbf94829 860
0e9b07e5 861 add_sched_event_run(sched, prev, timestamp, delta);
9ec3f4e4 862 add_sched_event_sleep(sched, prev, timestamp, prev_state);
a116e05d
ACM		 863
864 return 0;
fbf94829
IM		 865}
866
cb627505
DA		 867static int replay_fork_event(struct perf_sched *sched,
868 union perf_event *event,
869 struct machine *machine)
419ab0d6 870{
cb627505
DA		 871 struct thread *child, *parent;
872
314add6b
AH		 873 child = machine__findnew_thread(machine, event->fork.pid,
874 event->fork.tid);
875 parent = machine__findnew_thread(machine, event->fork.ppid,
876 event->fork.ptid);
cb627505
DA		 877
878 if (child == NULL || parent == NULL) {
879 pr_debug("thread does not exist on fork event: child %p, parent %p\n",
880 child, parent);
b91fc39f 881 goto out_put;
cb627505 882 }
9ec3f4e4 883
bb963e16 884 if (verbose > 0) {
cb627505 885 printf("fork event\n");
b9c5143a
FW		 886 printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid);
887 printf("... child: %s/%d\n", thread__comm_str(child), child->tid);
419ab0d6 888 }
9ec3f4e4 889
b9c5143a
FW		 890 register_pid(sched, parent->tid, thread__comm_str(parent));
891 register_pid(sched, child->tid, thread__comm_str(child));
b91fc39f
ACM		 892out_put:
893 thread__put(child);
894 thread__put(parent);
a116e05d 895 return 0;
419ab0d6 896}
fbf94829 897
b1ffe8f3
IM		 898struct sort_dimension {
899 const char *name;
b5fae128 900 sort_fn_t cmp;
b1ffe8f3
IM		 901 struct list_head list;
902};
903
8640da9f
CD		 904/*
905 * handle runtime stats saved per thread
906 */
907static struct thread_runtime *thread__init_runtime(struct thread *thread)
908{
909 struct thread_runtime *r;
910
911 r = zalloc(sizeof(struct thread_runtime));
912 if (!r)
913 return NULL;
914
915 init_stats(&r->run_stats);
916 thread__set_priv(thread, r);
917
918 return r;
919}
920
921static struct thread_runtime *thread__get_runtime(struct thread *thread)
922{
923 struct thread_runtime *tr;
924
925 tr = thread__priv(thread);
926 if (tr == NULL) {
927 tr = thread__init_runtime(thread);
928 if (tr == NULL)
929 pr_debug("Failed to malloc memory for runtime data.\n");
930 }
931
932 return tr;
933}
934
daa1d7a5 935static int
39aeb52f 936thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 937{
938 struct sort_dimension *sort;
939 int ret = 0;
940
b5fae128
IM		 941 BUG_ON(list_empty(list));
942
daa1d7a5
FW		 943 list_for_each_entry(sort, list, list) {
944 ret = sort->cmp(l, r);
945 if (ret)
946 return ret;
947 }
948
949 return ret;
950}
951
39aeb52f 952static struct work_atoms *
cb4c13a5 953thread_atoms_search(struct rb_root_cached *root, struct thread *thread,
b5fae128
IM		 954 struct list_head *sort_list)
955{
cb4c13a5 956 struct rb_node *node = root->rb_root.rb_node;
39aeb52f 957 struct work_atoms key = { .thread = thread };
b5fae128
IM		 958
959 while (node) {
39aeb52f 960 struct work_atoms *atoms;
b5fae128
IM		 961 int cmp;
962
39aeb52f 963 atoms = container_of(node, struct work_atoms, node);
b5fae128
IM		 964
965 cmp = thread_lat_cmp(sort_list, &key, atoms);
966 if (cmp > 0)
967 node = node->rb_left;
968 else if (cmp < 0)
969 node = node->rb_right;
970 else {
971 BUG_ON(thread != atoms->thread);
972 return atoms;
973 }
974 }
975 return NULL;
976}
977
cdce9d73 978static void
cb4c13a5 979__thread_latency_insert(struct rb_root_cached *root, struct work_atoms *data,
daa1d7a5 980 struct list_head *sort_list)
cdce9d73 981{
cb4c13a5
DB		 982 struct rb_node **new = &(root->rb_root.rb_node), *parent = NULL;
983 bool leftmost = true;
cdce9d73
FW		 984
985 while (*new) {
39aeb52f 986 struct work_atoms *this;
daa1d7a5 987 int cmp;
cdce9d73 988
39aeb52f 989 this = container_of(*new, struct work_atoms, node);
cdce9d73 990 parent = *new;
daa1d7a5
FW		 991
992 cmp = thread_lat_cmp(sort_list, data, this);
993
994 if (cmp > 0)
cdce9d73 995 new = &((*new)->rb_left);
cb4c13a5 996 else {
daa1d7a5 997 new = &((*new)->rb_right);
cb4c13a5
DB		 998 leftmost = false;
999 }
cdce9d73
FW		 1000 }
1001
1002 rb_link_node(&data->node, parent, new);
cb4c13a5 1003 rb_insert_color_cached(&data->node, root, leftmost);
cdce9d73
FW		 1004}
1005
0e9b07e5 1006static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
cdce9d73 1007{
36479484 1008 struct work_atoms *atoms = zalloc(sizeof(*atoms));
a116e05d
ACM		 1009 if (!atoms) {
1010 pr_err("No memory at %s\n", __func__);
1011 return -1;
1012 }
cdce9d73 1013
f3b623b8 1014 atoms->thread = thread__get(thread);
39aeb52f 1015 INIT_LIST_HEAD(&atoms->work_list);
0e9b07e5 1016 __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);
a116e05d 1017 return 0;
cdce9d73
FW		 1018}
1019
9ec3f4e4 1020static char sched_out_state(u64 prev_state)
cdce9d73
FW		 1021{
1022 const char *str = TASK_STATE_TO_CHAR_STR;
1023
9ec3f4e4 1024 return str[prev_state];
cdce9d73
FW		 1025}
1026
a116e05d 1027static int
39aeb52f 1028add_sched_out_event(struct work_atoms *atoms,
1029 char run_state,
1030 u64 timestamp)
cdce9d73 1031{
36479484 1032 struct work_atom *atom = zalloc(sizeof(*atom));
a116e05d
ACM		 1033 if (!atom) {
1034 pr_err("Non memory at %s", __func__);
1035 return -1;
1036 }
cdce9d73 1037
aa1ab9d2
FW		 1038 atom->sched_out_time = timestamp;
1039
39aeb52f 1040 if (run_state == 'R') {
b1ffe8f3 1041 atom->state = THREAD_WAIT_CPU;
aa1ab9d2 1042 atom->wake_up_time = atom->sched_out_time;
c6ced611
FW		 1043 }
1044
39aeb52f 1045 list_add_tail(&atom->list, &atoms->work_list);
a116e05d 1046 return 0;
cdce9d73
FW		 1047}
1048
1049static void
1d037ca1
IT		 1050add_runtime_event(struct work_atoms *atoms, u64 delta,
1051 u64 timestamp __maybe_unused)
39aeb52f 1052{
1053 struct work_atom *atom;
1054
1055 BUG_ON(list_empty(&atoms->work_list));
1056
1057 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1058
1059 atom->runtime += delta;
1060 atoms->total_runtime += delta;
1061}
1062
1063static void
1064add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
cdce9d73 1065{
b1ffe8f3 1066 struct work_atom *atom;
66685678 1067 u64 delta;
cdce9d73 1068
39aeb52f 1069 if (list_empty(&atoms->work_list))
cdce9d73
FW		 1070 return;
1071
39aeb52f 1072 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
cdce9d73 1073
b1ffe8f3 1074 if (atom->state != THREAD_WAIT_CPU)
cdce9d73
FW		 1075 return;
1076
b1ffe8f3
IM		 1077 if (timestamp < atom->wake_up_time) {
1078 atom->state = THREAD_IGNORE;
cdce9d73
FW		 1079 return;
1080 }
1081
b1ffe8f3
IM		 1082 atom->state = THREAD_SCHED_IN;
1083 atom->sched_in_time = timestamp;
66685678 1084
b1ffe8f3 1085 delta = atom->sched_in_time - atom->wake_up_time;
66685678 1086 atoms->total_lat += delta;
3786310a 1087 if (delta > atoms->max_lat) {
66685678 1088 atoms->max_lat = delta;
3786310a
FW		 1089 atoms->max_lat_at = timestamp;
1090 }
66685678 1091 atoms->nb_atoms++;
cdce9d73
FW		 1092}
1093
9ec3f4e4
ACM		 1094static int latency_switch_event(struct perf_sched *sched,
1095 struct perf_evsel *evsel,
1096 struct perf_sample *sample,
1097 struct machine *machine)
cdce9d73 1098{
9ec3f4e4
ACM		 1099 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1100 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1101 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
39aeb52f 1102 struct work_atoms *out_events, *in_events;
cdce9d73 1103 struct thread *sched_out, *sched_in;
7f7f8d0b 1104 u64 timestamp0, timestamp = sample->time;
b91fc39f 1105 int cpu = sample->cpu, err = -1;
ea92ed5a
IM		 1106 s64 delta;
1107
39aeb52f 1108 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
ea92ed5a 1109
0e9b07e5
ACM		 1110 timestamp0 = sched->cpu_last_switched[cpu];
1111 sched->cpu_last_switched[cpu] = timestamp;
ea92ed5a
IM		 1112 if (timestamp0)
1113 delta = timestamp - timestamp0;
1114 else
1115 delta = 0;
1116
a116e05d
ACM		 1117 if (delta < 0) {
1118 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1119 return -1;
1120 }
cdce9d73 1121
1fcb8768
AH		 1122 sched_out = machine__findnew_thread(machine, -1, prev_pid);
1123 sched_in = machine__findnew_thread(machine, -1, next_pid);
b91fc39f
ACM		 1124 if (sched_out == NULL || sched_in == NULL)
1125 goto out_put;
cdce9d73 1126
0e9b07e5 1127 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
39aeb52f 1128 if (!out_events) {
0e9b07e5 1129 if (thread_atoms_insert(sched, sched_out))
b91fc39f 1130 goto out_put;
0e9b07e5 1131 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
a116e05d
ACM		 1132 if (!out_events) {
1133 pr_err("out-event: Internal tree error");
b91fc39f 1134 goto out_put;
a116e05d 1135 }
39aeb52f 1136 }
9ec3f4e4 1137 if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
a116e05d 1138 return -1;
39aeb52f 1139
0e9b07e5 1140 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
39aeb52f 1141 if (!in_events) {
0e9b07e5 1142 if (thread_atoms_insert(sched, sched_in))
b91fc39f 1143 goto out_put;
0e9b07e5 1144 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
a116e05d
ACM		 1145 if (!in_events) {
1146 pr_err("in-event: Internal tree error");
b91fc39f 1147 goto out_put;
a116e05d 1148 }
39aeb52f 1149 /*
1150 * Take came in we have not heard about yet,
1151 * add in an initial atom in runnable state:
1152 */
a116e05d 1153 if (add_sched_out_event(in_events, 'R', timestamp))
b91fc39f 1154 goto out_put;
cdce9d73 1155 }
39aeb52f 1156 add_sched_in_event(in_events, timestamp);
b91fc39f
ACM		 1157 err = 0;
1158out_put:
1159 thread__put(sched_out);
1160 thread__put(sched_in);
1161 return err;
39aeb52f 1162}
cdce9d73 1163
9ec3f4e4
ACM		 1164static int latency_runtime_event(struct perf_sched *sched,
1165 struct perf_evsel *evsel,
1166 struct perf_sample *sample,
1167 struct machine *machine)
39aeb52f 1168{
9ec3f4e4
ACM		 1169 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
1170 const u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
1fcb8768 1171 struct thread *thread = machine__findnew_thread(machine, -1, pid);
0e9b07e5 1172 struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
7f7f8d0b 1173 u64 timestamp = sample->time;
b91fc39f
ACM		 1174 int cpu = sample->cpu, err = -1;
1175
1176 if (thread == NULL)
1177 return -1;
39aeb52f 1178
1179 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
39aeb52f 1180 if (!atoms) {
0e9b07e5 1181 if (thread_atoms_insert(sched, thread))
b91fc39f 1182 goto out_put;
0e9b07e5 1183 atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
a116e05d 1184 if (!atoms) {
60b7d14a 1185 pr_err("in-event: Internal tree error");
b91fc39f 1186 goto out_put;
a116e05d
ACM		 1187 }
1188 if (add_sched_out_event(atoms, 'R', timestamp))
b91fc39f 1189 goto out_put;
cdce9d73
FW		 1190 }
1191
9ec3f4e4 1192 add_runtime_event(atoms, runtime, timestamp);
b91fc39f
ACM		 1193 err = 0;
1194out_put:
1195 thread__put(thread);
1196 return err;
cdce9d73
FW		 1197}
1198
9ec3f4e4
ACM		 1199static int latency_wakeup_event(struct perf_sched *sched,
1200 struct perf_evsel *evsel,
1201 struct perf_sample *sample,
1202 struct machine *machine)
cdce9d73 1203{
0680ee7d 1204 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
39aeb52f 1205 struct work_atoms *atoms;
b1ffe8f3 1206 struct work_atom *atom;
cdce9d73 1207 struct thread *wakee;
7f7f8d0b 1208 u64 timestamp = sample->time;
b91fc39f 1209 int err = -1;
cdce9d73 1210
1fcb8768 1211 wakee = machine__findnew_thread(machine, -1, pid);
b91fc39f
ACM		 1212 if (wakee == NULL)
1213 return -1;
0e9b07e5 1214 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
17562205 1215 if (!atoms) {
0e9b07e5 1216 if (thread_atoms_insert(sched, wakee))
b91fc39f 1217 goto out_put;
0e9b07e5 1218 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
a116e05d 1219 if (!atoms) {
60b7d14a 1220 pr_err("wakeup-event: Internal tree error");
b91fc39f 1221 goto out_put;
a116e05d
ACM		 1222 }
1223 if (add_sched_out_event(atoms, 'S', timestamp))
b91fc39f 1224 goto out_put;
cdce9d73
FW		 1225 }
1226
39aeb52f 1227 BUG_ON(list_empty(&atoms->work_list));
cdce9d73 1228
39aeb52f 1229 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
cdce9d73 1230
55ffb7a6 1231 /*
67d6259d
DY		 1232 * As we do not guarantee the wakeup event happens when
1233 * task is out of run queue, also may happen when task is
1234 * on run queue and wakeup only change ->state to TASK_RUNNING,
1235 * then we should not set the ->wake_up_time when wake up a
1236 * task which is on run queue.
1237 *
55ffb7a6
MG		 1238 * You WILL be missing events if you've recorded only
1239 * one CPU, or are only looking at only one, so don't
67d6259d 1240 * skip in this case.
55ffb7a6 1241 */
0e9b07e5 1242 if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
b91fc39f 1243 goto out_ok;
cdce9d73 1244
0e9b07e5 1245 sched->nr_timestamps++;
ea57c4f5 1246 if (atom->sched_out_time > timestamp) {
0e9b07e5 1247 sched->nr_unordered_timestamps++;
b91fc39f 1248 goto out_ok;
ea57c4f5 1249 }
aa1ab9d2 1250
b1ffe8f3
IM		 1251 atom->state = THREAD_WAIT_CPU;
1252 atom->wake_up_time = timestamp;
b91fc39f
ACM		 1253out_ok:
1254 err = 0;
1255out_put:
1256 thread__put(wakee);
1257 return err;
cdce9d73
FW		 1258}
1259
9ec3f4e4
ACM		 1260static int latency_migrate_task_event(struct perf_sched *sched,
1261 struct perf_evsel *evsel,
1262 struct perf_sample *sample,
1263 struct machine *machine)
55ffb7a6 1264{
9ec3f4e4 1265 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
7f7f8d0b 1266 u64 timestamp = sample->time;
55ffb7a6
MG		 1267 struct work_atoms *atoms;
1268 struct work_atom *atom;
1269 struct thread *migrant;
b91fc39f 1270 int err = -1;
55ffb7a6
MG		 1271
1272 /*
1273 * Only need to worry about migration when profiling one CPU.
1274 */
0e9b07e5 1275 if (sched->profile_cpu == -1)
a116e05d 1276 return 0;
55ffb7a6 1277
1fcb8768 1278 migrant = machine__findnew_thread(machine, -1, pid);
b91fc39f
ACM		 1279 if (migrant == NULL)
1280 return -1;
0e9b07e5 1281 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
55ffb7a6 1282 if (!atoms) {
0e9b07e5 1283 if (thread_atoms_insert(sched, migrant))
b91fc39f 1284 goto out_put;
b9c5143a 1285 register_pid(sched, migrant->tid, thread__comm_str(migrant));
0e9b07e5 1286 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
a116e05d 1287 if (!atoms) {
60b7d14a 1288 pr_err("migration-event: Internal tree error");
b91fc39f 1289 goto out_put;
a116e05d
ACM		 1290 }
1291 if (add_sched_out_event(atoms, 'R', timestamp))
b91fc39f 1292 goto out_put;
55ffb7a6
MG		 1293 }
1294
1295 BUG_ON(list_empty(&atoms->work_list));
1296
1297 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1298 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1299
0e9b07e5 1300 sched->nr_timestamps++;
55ffb7a6
MG		 1301
1302 if (atom->sched_out_time > timestamp)
0e9b07e5 1303 sched->nr_unordered_timestamps++;
b91fc39f
ACM		 1304 err = 0;
1305out_put:
1306 thread__put(migrant);
1307 return err;
55ffb7a6
MG		 1308}
1309
0e9b07e5 1310static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list)
cdce9d73 1311{
cdce9d73
FW		 1312 int i;
1313 int ret;
66685678 1314 u64 avg;
99620a5d 1315 char max_lat_at[32];
cdce9d73 1316
39aeb52f 1317 if (!work_list->nb_atoms)
cdce9d73 1318 return;
ea57c4f5
IM		 1319 /*
1320 * Ignore idle threads:
1321 */
b9c5143a 1322 if (!strcmp(thread__comm_str(work_list->thread), "swapper"))
ea57c4f5 1323 return;
cdce9d73 1324
0e9b07e5
ACM		 1325 sched->all_runtime += work_list->total_runtime;
1326 sched->all_count += work_list->nb_atoms;
66685678 1327
2f80dd44
JB		 1328 if (work_list->num_merged > 1)
1329 ret = printf(" %s:(%d) ", thread__comm_str(work_list->thread), work_list->num_merged);
1330 else
1331 ret = printf(" %s:%d ", thread__comm_str(work_list->thread), work_list->thread->tid);
cdce9d73 1332
08f69e6c 1333 for (i = 0; i < 24 - ret; i++)
cdce9d73
FW		 1334 printf(" ");
1335
39aeb52f 1336 avg = work_list->total_lat / work_list->nb_atoms;
99620a5d 1337 timestamp__scnprintf_usec(work_list->max_lat_at, max_lat_at, sizeof(max_lat_at));
cdce9d73 1338
99620a5d 1339 printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13s s\n",
4fc76e49
ACM		 1340 (double)work_list->total_runtime / NSEC_PER_MSEC,
1341 work_list->nb_atoms, (double)avg / NSEC_PER_MSEC,
1342 (double)work_list->max_lat / NSEC_PER_MSEC,
99620a5d 1343 max_lat_at);
cdce9d73
FW		 1344}
1345
39aeb52f 1346static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5 1347{
0014de17
JO		 1348 if (l->thread == r->thread)
1349 return 0;
38051234 1350 if (l->thread->tid < r->thread->tid)
daa1d7a5 1351 return -1;
38051234 1352 if (l->thread->tid > r->thread->tid)
daa1d7a5 1353 return 1;
0014de17 1354 return (int)(l->thread - r->thread);
daa1d7a5
FW		 1355}
1356
39aeb52f 1357static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1358{
1359 u64 avgl, avgr;
1360
1361 if (!l->nb_atoms)
1362 return -1;
1363
1364 if (!r->nb_atoms)
1365 return 1;
1366
1367 avgl = l->total_lat / l->nb_atoms;
1368 avgr = r->total_lat / r->nb_atoms;
1369
1370 if (avgl < avgr)
1371 return -1;
1372 if (avgl > avgr)
1373 return 1;
1374
1375 return 0;
1376}
1377
39aeb52f 1378static int max_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1379{
1380 if (l->max_lat < r->max_lat)
1381 return -1;
1382 if (l->max_lat > r->max_lat)
1383 return 1;
1384
1385 return 0;
1386}
1387
39aeb52f 1388static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1389{
1390 if (l->nb_atoms < r->nb_atoms)
1391 return -1;
1392 if (l->nb_atoms > r->nb_atoms)
1393 return 1;
1394
1395 return 0;
1396}
1397
39aeb52f 1398static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1399{
1400 if (l->total_runtime < r->total_runtime)
1401 return -1;
1402 if (l->total_runtime > r->total_runtime)
1403 return 1;
1404
1405 return 0;
1406}
1407
cbef79a8 1408static int sort_dimension__add(const char *tok, struct list_head *list)
daa1d7a5 1409{
0e9b07e5
ACM		 1410 size_t i;
1411 static struct sort_dimension avg_sort_dimension = {
1412 .name = "avg",
1413 .cmp = avg_cmp,
1414 };
1415 static struct sort_dimension max_sort_dimension = {
1416 .name = "max",
1417 .cmp = max_cmp,
1418 };
1419 static struct sort_dimension pid_sort_dimension = {
1420 .name = "pid",
1421 .cmp = pid_cmp,
1422 };
1423 static struct sort_dimension runtime_sort_dimension = {
1424 .name = "runtime",
1425 .cmp = runtime_cmp,
1426 };
1427 static struct sort_dimension switch_sort_dimension = {
1428 .name = "switch",
1429 .cmp = switch_cmp,
1430 };
1431 struct sort_dimension *available_sorts[] = {
1432 &pid_sort_dimension,
1433 &avg_sort_dimension,
1434 &max_sort_dimension,
1435 &switch_sort_dimension,
1436 &runtime_sort_dimension,
1437 };
daa1d7a5 1438
0e9b07e5 1439 for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
daa1d7a5
FW		 1440 if (!strcmp(available_sorts[i]->name, tok)) {
1441 list_add_tail(&available_sorts[i]->list, list);
1442
1443 return 0;
1444 }
1445 }
1446
1447 return -1;
1448}
1449
0e9b07e5 1450static void perf_sched__sort_lat(struct perf_sched *sched)
daa1d7a5
FW		 1451{
1452 struct rb_node *node;
cb4c13a5 1453 struct rb_root_cached *root = &sched->atom_root;
2f80dd44 1454again:
daa1d7a5 1455 for (;;) {
39aeb52f 1456 struct work_atoms *data;
cb4c13a5 1457 node = rb_first_cached(root);
daa1d7a5
FW		 1458 if (!node)
1459 break;
1460
cb4c13a5 1461 rb_erase_cached(node, root);
39aeb52f 1462 data = rb_entry(node, struct work_atoms, node);
0e9b07e5 1463 __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list);
daa1d7a5 1464 }
2f80dd44
JB		 1465 if (root == &sched->atom_root) {
1466 root = &sched->merged_atom_root;
1467 goto again;
1468 }
daa1d7a5
FW		 1469}
1470
0e9b07e5 1471static int process_sched_wakeup_event(struct perf_tool *tool,
2b7fcbc5 1472 struct perf_evsel *evsel,
1d037ca1 1473 struct perf_sample *sample,
4218e673 1474 struct machine *machine)
419ab0d6 1475{
0e9b07e5 1476 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
419ab0d6 1477
9ec3f4e4
ACM		 1478 if (sched->tp_handler->wakeup_event)
1479 return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
a116e05d 1480
2b7fcbc5 1481 return 0;
419ab0d6
FW		 1482}
1483
a151a37a
JO		 1484union map_priv {
1485 void *ptr;
1486 bool color;
1487};
1488
1489static bool thread__has_color(struct thread *thread)
1490{
1491 union map_priv priv = {
1492 .ptr = thread__priv(thread),
1493 };
1494
1495 return priv.color;
1496}
1497
1498static struct thread*
1499map__findnew_thread(struct perf_sched *sched, struct machine *machine, pid_t pid, pid_t tid)
1500{
1501 struct thread *thread = machine__findnew_thread(machine, pid, tid);
1502 union map_priv priv = {
1503 .color = false,
1504 };
1505
1506 if (!sched->map.color_pids || !thread || thread__priv(thread))
1507 return thread;
1508
1509 if (thread_map__has(sched->map.color_pids, tid))
1510 priv.color = true;
1511
1512 thread__set_priv(thread, priv.ptr);
1513 return thread;
1514}
1515
9ec3f4e4
ACM		 1516static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
1517 struct perf_sample *sample, struct machine *machine)
0ec04e16 1518{
9d372ca5
DY		 1519 const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1520 struct thread *sched_in;
8640da9f 1521 struct thread_runtime *tr;
0ec04e16 1522 int new_shortname;
7f7f8d0b 1523 u64 timestamp0, timestamp = sample->time;
0ec04e16 1524 s64 delta;
99623c62
JO		 1525 int i, this_cpu = sample->cpu;
1526 int cpus_nr;
1527 bool new_cpu = false;
8cd91195 1528 const char *color = PERF_COLOR_NORMAL;
99620a5d 1529 char stimestamp[32];
0ec04e16
IM		 1530
1531 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1532
0e9b07e5
ACM		 1533 if (this_cpu > sched->max_cpu)
1534 sched->max_cpu = this_cpu;
0ec04e16 1535
99623c62
JO		 1536 if (sched->map.comp) {
1537 cpus_nr = bitmap_weight(sched->map.comp_cpus_mask, MAX_CPUS);
1538 if (!test_and_set_bit(this_cpu, sched->map.comp_cpus_mask)) {
1539 sched->map.comp_cpus[cpus_nr++] = this_cpu;
1540 new_cpu = true;
1541 }
1542 } else
1543 cpus_nr = sched->max_cpu;
1544
0e9b07e5
ACM		 1545 timestamp0 = sched->cpu_last_switched[this_cpu];
1546 sched->cpu_last_switched[this_cpu] = timestamp;
0ec04e16
IM		 1547 if (timestamp0)
1548 delta = timestamp - timestamp0;
1549 else
1550 delta = 0;
1551
a116e05d 1552 if (delta < 0) {
60b7d14a 1553 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
a116e05d
ACM		 1554 return -1;
1555 }
0ec04e16 1556
a151a37a 1557 sched_in = map__findnew_thread(sched, machine, -1, next_pid);
b91fc39f
ACM		 1558 if (sched_in == NULL)
1559 return -1;
0ec04e16 1560
8640da9f
CD		 1561 tr = thread__get_runtime(sched_in);
1562 if (tr == NULL) {
1563 thread__put(sched_in);
1564 return -1;
1565 }
1566
b91fc39f 1567 sched->curr_thread[this_cpu] = thread__get(sched_in);
0ec04e16
IM		 1568
1569 printf(" ");
1570
1571 new_shortname = 0;
8640da9f 1572 if (!tr->shortname[0]) {
6bcab4e1
D		 1573 if (!strcmp(thread__comm_str(sched_in), "swapper")) {
1574 /*
1575 * Don't allocate a letter-number for swapper:0
1576 * as a shortname. Instead, we use '.' for it.
1577 */
8640da9f
CD		 1578 tr->shortname[0] = '.';
1579 tr->shortname[1] = ' ';
0ec04e16 1580 } else {
8640da9f
CD		 1581 tr->shortname[0] = sched->next_shortname1;
1582 tr->shortname[1] = sched->next_shortname2;
6bcab4e1
D		 1583
1584 if (sched->next_shortname1 < 'Z') {
1585 sched->next_shortname1++;
0ec04e16 1586 } else {
6bcab4e1
D		 1587 sched->next_shortname1 = 'A';
1588 if (sched->next_shortname2 < '9')
1589 sched->next_shortname2++;
1590 else
1591 sched->next_shortname2 = '0';
0ec04e16
IM		 1592 }
1593 }
1594 new_shortname = 1;
1595 }
1596
99623c62
JO		 1597 for (i = 0; i < cpus_nr; i++) {
1598 int cpu = sched->map.comp ? sched->map.comp_cpus[i] : i;
a151a37a 1599 struct thread *curr_thread = sched->curr_thread[cpu];
8640da9f 1600 struct thread_runtime *curr_tr;
a151a37a 1601 const char *pid_color = color;
cf294f24 1602 const char *cpu_color = color;
a151a37a
JO		 1603
1604 if (curr_thread && thread__has_color(curr_thread))
1605 pid_color = COLOR_PIDS;
99623c62 1606
73643bb6
JO		 1607 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, cpu))
1608 continue;
1609
cf294f24
JO		 1610 if (sched->map.color_cpus && cpu_map__has(sched->map.color_cpus, cpu))
1611 cpu_color = COLOR_CPUS;
1612
0ec04e16 1613 if (cpu != this_cpu)
1208bb27 1614 color_fprintf(stdout, color, " ");
0ec04e16 1615 else
cf294f24 1616 color_fprintf(stdout, cpu_color, "*");
0ec04e16 1617
8640da9f
CD		 1618 if (sched->curr_thread[cpu]) {
1619 curr_tr = thread__get_runtime(sched->curr_thread[cpu]);
1620 if (curr_tr == NULL) {
1621 thread__put(sched_in);
1622 return -1;
1623 }
1624 color_fprintf(stdout, pid_color, "%2s ", curr_tr->shortname);
1625 } else
8cd91195 1626 color_fprintf(stdout, color, " ");
0ec04e16
IM		 1627 }
1628
73643bb6
JO		 1629 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, this_cpu))
1630 goto out;
1631
99620a5d
NK		 1632 timestamp__scnprintf_usec(timestamp, stimestamp, sizeof(stimestamp));
1633 color_fprintf(stdout, color, " %12s secs ", stimestamp);
99a3c3a9 1634 if (new_shortname || tr->comm_changed || (verbose > 0 && sched_in->tid)) {
a151a37a
JO		 1635 const char *pid_color = color;
1636
1637 if (thread__has_color(sched_in))
1638 pid_color = COLOR_PIDS;
1639
1640 color_fprintf(stdout, pid_color, "%s => %s:%d",
8640da9f 1641 tr->shortname, thread__comm_str(sched_in), sched_in->tid);
99a3c3a9 1642 tr->comm_changed = false;
0ec04e16 1643 }
a116e05d 1644
99623c62 1645 if (sched->map.comp && new_cpu)
8cd91195 1646 color_fprintf(stdout, color, " (CPU %d)", this_cpu);
99623c62 1647
73643bb6 1648out:
8cd91195 1649 color_fprintf(stdout, color, "\n");
99623c62 1650
b91fc39f
ACM		 1651 thread__put(sched_in);
1652
a116e05d 1653 return 0;
0ec04e16
IM		 1654}
1655
0e9b07e5 1656static int process_sched_switch_event(struct perf_tool *tool,
2b7fcbc5 1657 struct perf_evsel *evsel,
1d037ca1 1658 struct perf_sample *sample,
4218e673 1659 struct machine *machine)
419ab0d6 1660{
0e9b07e5 1661 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
a116e05d 1662 int this_cpu = sample->cpu, err = 0;
2b7fcbc5
ACM		 1663 u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1664 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
419ab0d6 1665
0e9b07e5 1666 if (sched->curr_pid[this_cpu] != (u32)-1) {
c8a37751
IM		 1667 /*
1668 * Are we trying to switch away a PID that is
1669 * not current?
1670 */
2b7fcbc5 1671 if (sched->curr_pid[this_cpu] != prev_pid)
0e9b07e5 1672 sched->nr_context_switch_bugs++;
c8a37751 1673 }
c8a37751 1674
9ec3f4e4
ACM		 1675 if (sched->tp_handler->switch_event)
1676 err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
2b7fcbc5
ACM		 1677
1678 sched->curr_pid[this_cpu] = next_pid;
a116e05d 1679 return err;
419ab0d6
FW		 1680}
1681
0e9b07e5 1682static int process_sched_runtime_event(struct perf_tool *tool,
2b7fcbc5 1683 struct perf_evsel *evsel,
1d037ca1 1684 struct perf_sample *sample,
4218e673 1685 struct machine *machine)
39aeb52f 1686{
0e9b07e5 1687 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
39aeb52f 1688
9ec3f4e4
ACM		 1689 if (sched->tp_handler->runtime_event)
1690 return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
a116e05d 1691
2b7fcbc5 1692 return 0;
39aeb52f 1693}
1694
cb627505
DA		 1695static int perf_sched__process_fork_event(struct perf_tool *tool,
1696 union perf_event *event,
1697 struct perf_sample *sample,
1698 struct machine *machine)
fbf94829 1699{
0e9b07e5 1700 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
46538818 1701
cb627505
DA		 1702 /* run the fork event through the perf machineruy */
1703 perf_event__process_fork(tool, event, sample, machine);
1704
1705 /* and then run additional processing needed for this command */
9ec3f4e4 1706 if (sched->tp_handler->fork_event)
cb627505 1707 return sched->tp_handler->fork_event(sched, event, machine);
a116e05d 1708
2b7fcbc5 1709 return 0;
fbf94829
IM		 1710}
1711
0e9b07e5 1712static int process_sched_migrate_task_event(struct perf_tool *tool,
2b7fcbc5 1713 struct perf_evsel *evsel,
1d037ca1 1714 struct perf_sample *sample,
4218e673 1715 struct machine *machine)
55ffb7a6 1716{
0e9b07e5 1717 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
55ffb7a6 1718
9ec3f4e4
ACM		 1719 if (sched->tp_handler->migrate_task_event)
1720 return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
a116e05d 1721
2b7fcbc5 1722 return 0;
55ffb7a6
MG		 1723}
1724
a116e05d 1725typedef int (*tracepoint_handler)(struct perf_tool *tool,
2b7fcbc5 1726 struct perf_evsel *evsel,
a116e05d 1727 struct perf_sample *sample,
4218e673 1728 struct machine *machine);
ec156764 1729
1d037ca1
IT		 1730static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
1731 union perf_event *event __maybe_unused,
ee29be62
ACM		 1732 struct perf_sample *sample,
1733 struct perf_evsel *evsel,
1734 struct machine *machine)
0a02ad93 1735{
a116e05d 1736 int err = 0;
0a02ad93 1737
744a9719
ACM		 1738 if (evsel->handler != NULL) {
1739 tracepoint_handler f = evsel->handler;
2b7fcbc5 1740 err = f(tool, evsel, sample, machine);
ee29be62 1741 }
0a02ad93 1742
a116e05d 1743 return err;
0a02ad93
IM		 1744}
1745
99a3c3a9
CD		 1746static int perf_sched__process_comm(struct perf_tool *tool __maybe_unused,
1747 union perf_event *event,
1748 struct perf_sample *sample,
1749 struct machine *machine)
1750{
1751 struct thread *thread;
1752 struct thread_runtime *tr;
1753 int err;
1754
1755 err = perf_event__process_comm(tool, event, sample, machine);
1756 if (err)
1757 return err;
1758
1759 thread = machine__find_thread(machine, sample->pid, sample->tid);
1760 if (!thread) {
1761 pr_err("Internal error: can't find thread\n");
1762 return -1;
1763 }
1764
1765 tr = thread__get_runtime(thread);
1766 if (tr == NULL) {
1767 thread__put(thread);
1768 return -1;
1769 }
1770
1771 tr->comm_changed = true;
1772 thread__put(thread);
1773
1774 return 0;
1775}
1776
ae536acf 1777static int perf_sched__read_events(struct perf_sched *sched)
0a02ad93 1778{
ee29be62
ACM		 1779 const struct perf_evsel_str_handler handlers[] = {
1780 { "sched:sched_switch", process_sched_switch_event, },
1781 { "sched:sched_stat_runtime", process_sched_runtime_event, },
1782 { "sched:sched_wakeup", process_sched_wakeup_event, },
1783 { "sched:sched_wakeup_new", process_sched_wakeup_event, },
ee29be62
ACM		 1784 { "sched:sched_migrate_task", process_sched_migrate_task_event, },
1785 };
da378962 1786 struct perf_session *session;
8ceb41d7 1787 struct perf_data data = {
2d4f2799
JO		 1788 .path = input_name,
1789 .mode = PERF_DATA_MODE_READ,
1790 .force = sched->force,
f5fc1412 1791 };
ae536acf 1792 int rc = -1;
da378962 1793
8ceb41d7 1794 session = perf_session__new(&data, false, &sched->tool);
a116e05d
ACM		 1795 if (session == NULL) {
1796 pr_debug("No Memory for session\n");
1797 return -1;
1798 }
94c744b6 1799
0a7e6d1b 1800 symbol__init(&session->header.env);
04934106 1801
a116e05d
ACM		 1802 if (perf_session__set_tracepoints_handlers(session, handlers))
1803 goto out_delete;
ee29be62 1804
cee75ac7 1805 if (perf_session__has_traces(session, "record -R")) {
b7b61cbe 1806 int err = perf_session__process_events(session);
a116e05d
ACM		 1807 if (err) {
1808 pr_err("Failed to process events, error %d", err);
1809 goto out_delete;
1810 }
4c09bafa 1811
75be989a
ACM		 1812 sched->nr_events = session->evlist->stats.nr_events[0];
1813 sched->nr_lost_events = session->evlist->stats.total_lost;
1814 sched->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST];
cee75ac7 1815 }
d549c769 1816
ae536acf 1817 rc = 0;
a116e05d
ACM		 1818out_delete:
1819 perf_session__delete(session);
ae536acf 1820 return rc;
0a02ad93
IM		 1821}
1822
49394a2a
DA		 1823/*
1824 * scheduling times are printed as msec.usec
1825 */
1826static inline void print_sched_time(unsigned long long nsecs, int width)
1827{
1828 unsigned long msecs;
1829 unsigned long usecs;
1830
1831 msecs = nsecs / NSEC_PER_MSEC;
1832 nsecs -= msecs * NSEC_PER_MSEC;
1833 usecs = nsecs / NSEC_PER_USEC;
1834 printf("%*lu.%03lu ", width, msecs, usecs);
1835}
1836
1837/*
1838 * returns runtime data for event, allocating memory for it the
1839 * first time it is used.
1840 */
1841static struct evsel_runtime *perf_evsel__get_runtime(struct perf_evsel *evsel)
1842{
1843 struct evsel_runtime *r = evsel->priv;
1844
1845 if (r == NULL) {
1846 r = zalloc(sizeof(struct evsel_runtime));
1847 evsel->priv = r;
1848 }
1849
1850 return r;
1851}
1852
1853/*
1854 * save last time event was seen per cpu
1855 */
1856static void perf_evsel__save_time(struct perf_evsel *evsel,
1857 u64 timestamp, u32 cpu)
1858{
1859 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1860
1861 if (r == NULL)
1862 return;
1863
1864 if ((cpu >= r->ncpu) || (r->last_time == NULL)) {
1865 int i, n = __roundup_pow_of_two(cpu+1);
1866 void *p = r->last_time;
1867
1868 p = realloc(r->last_time, n * sizeof(u64));
1869 if (!p)
1870 return;
1871
1872 r->last_time = p;
1873 for (i = r->ncpu; i < n; ++i)
1874 r->last_time[i] = (u64) 0;
1875
1876 r->ncpu = n;
1877 }
1878
1879 r->last_time[cpu] = timestamp;
1880}
1881
1882/* returns last time this event was seen on the given cpu */
1883static u64 perf_evsel__get_time(struct perf_evsel *evsel, u32 cpu)
1884{
1885 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1886
1887 if ((r == NULL) || (r->last_time == NULL) || (cpu >= r->ncpu))
1888 return 0;
1889
1890 return r->last_time[cpu];
1891}
1892
9b8087d7 1893static int comm_width = 30;
49394a2a
DA		 1894
1895static char *timehist_get_commstr(struct thread *thread)
1896{
1897 static char str[32];
1898 const char *comm = thread__comm_str(thread);
1899 pid_t tid = thread->tid;
1900 pid_t pid = thread->pid_;
1901 int n;
1902
1903 if (pid == 0)
1904 n = scnprintf(str, sizeof(str), "%s", comm);
1905
1906 else if (tid != pid)
1907 n = scnprintf(str, sizeof(str), "%s[%d/%d]", comm, tid, pid);
1908
1909 else
1910 n = scnprintf(str, sizeof(str), "%s[%d]", comm, tid);
1911
1912 if (n > comm_width)
1913 comm_width = n;
1914
1915 return str;
1916}
1917
a407b067 1918static void timehist_header(struct perf_sched *sched)
49394a2a 1919{
a407b067
DA		 1920 u32 ncpus = sched->max_cpu + 1;
1921 u32 i, j;
1922
49394a2a
DA		 1923 printf("%15s %6s ", "time", "cpu");
1924
a407b067
DA		 1925 if (sched->show_cpu_visual) {
1926 printf(" ");
1927 for (i = 0, j = 0; i < ncpus; ++i) {
1928 printf("%x", j++);
1929 if (j > 15)
1930 j = 0;
1931 }
1932 printf(" ");
1933 }
1934
0e6758e8 1935 printf(" %-*s %9s %9s %9s", comm_width,
49394a2a
DA		 1936 "task name", "wait time", "sch delay", "run time");
1937
414e050c
NK		 1938 if (sched->show_state)
1939 printf(" %s", "state");
1940
49394a2a
DA		 1941 printf("\n");
1942
1943 /*
1944 * units row
1945 */
1946 printf("%15s %-6s ", "", "");
1947
a407b067
DA		 1948 if (sched->show_cpu_visual)
1949 printf(" %*s ", ncpus, "");
1950
414e050c 1951 printf(" %-*s %9s %9s %9s", comm_width,
0e6758e8 1952 "[tid/pid]", "(msec)", "(msec)", "(msec)");
49394a2a 1953
414e050c
NK		 1954 if (sched->show_state)
1955 printf(" %5s", "");
1956
1957 printf("\n");
1958
49394a2a
DA		 1959 /*
1960 * separator
1961 */
1962 printf("%.15s %.6s ", graph_dotted_line, graph_dotted_line);
1963
a407b067
DA		 1964 if (sched->show_cpu_visual)
1965 printf(" %.*s ", ncpus, graph_dotted_line);
1966
0e6758e8 1967 printf(" %.*s %.9s %.9s %.9s", comm_width,
49394a2a
DA		 1968 graph_dotted_line, graph_dotted_line, graph_dotted_line,
1969 graph_dotted_line);
1970
414e050c
NK		 1971 if (sched->show_state)
1972 printf(" %.5s", graph_dotted_line);
1973
49394a2a
DA		 1974 printf("\n");
1975}
1976
414e050c
NK		 1977static char task_state_char(struct thread *thread, int state)
1978{
1979 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
1980 unsigned bit = state ? ffs(state) : 0;
1981
1982 /* 'I' for idle */
1983 if (thread->tid == 0)
1984 return 'I';
1985
1986 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
1987}
1988
fc1469f1 1989static void timehist_print_sample(struct perf_sched *sched,
292c4a8f 1990 struct perf_evsel *evsel,
fc1469f1 1991 struct perf_sample *sample,
6c973c90 1992 struct addr_location *al,
853b7407 1993 struct thread *thread,
414e050c 1994 u64 t, int state)
49394a2a
DA		 1995{
1996 struct thread_runtime *tr = thread__priv(thread);
292c4a8f
BG		 1997 const char *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
1998 const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
a407b067 1999 u32 max_cpus = sched->max_cpu + 1;
49394a2a 2000 char tstr[64];
292c4a8f 2001 char nstr[30];
941bdea7 2002 u64 wait_time;
49394a2a 2003
853b7407 2004 timestamp__scnprintf_usec(t, tstr, sizeof(tstr));
49394a2a
DA		 2005 printf("%15s [%04d] ", tstr, sample->cpu);
2006
a407b067
DA		 2007 if (sched->show_cpu_visual) {
2008 u32 i;
2009 char c;
2010
2011 printf(" ");
2012 for (i = 0; i < max_cpus; ++i) {
2013 /* flag idle times with 'i'; others are sched events */
2014 if (i == sample->cpu)
2015 c = (thread->tid == 0) ? 'i' : 's';
2016 else
2017 c = ' ';
2018 printf("%c", c);
2019 }
2020 printf(" ");
2021 }
2022
49394a2a
DA		 2023 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2024
941bdea7
NK		 2025 wait_time = tr->dt_sleep + tr->dt_iowait + tr->dt_preempt;
2026 print_sched_time(wait_time, 6);
2027
49394a2a
DA		 2028 print_sched_time(tr->dt_delay, 6);
2029 print_sched_time(tr->dt_run, 6);
fc1469f1 2030
414e050c
NK		 2031 if (sched->show_state)
2032 printf(" %5c ", task_state_char(thread, state));
2033
292c4a8f
BG		 2034 if (sched->show_next) {
2035 snprintf(nstr, sizeof(nstr), "next: %s[%d]", next_comm, next_pid);
2036 printf(" %-*s", comm_width, nstr);
2037 }
2038
2039 if (sched->show_wakeups && !sched->show_next)
fc1469f1
DA		 2040 printf(" %-*s", comm_width, "");
2041
6c973c90
DA		 2042 if (thread->tid == 0)
2043 goto out;
2044
2045 if (sched->show_callchain)
2046 printf(" ");
2047
2048 sample__fprintf_sym(sample, al, 0,
2049 EVSEL__PRINT_SYM | EVSEL__PRINT_ONELINE |
2d9bbf6e
NK		 2050 EVSEL__PRINT_CALLCHAIN_ARROW |
2051 EVSEL__PRINT_SKIP_IGNORED,
6c973c90
DA		 2052 &callchain_cursor, stdout);
2053
2054out:
49394a2a
DA		 2055 printf("\n");
2056}
2057
2058/*
2059 * Explanation of delta-time stats:
2060 *
2061 * t = time of current schedule out event
2062 * tprev = time of previous sched out event
2063 * also time of schedule-in event for current task
2064 * last_time = time of last sched change event for current task
2065 * (i.e, time process was last scheduled out)
2066 * ready_to_run = time of wakeup for current task
2067 *
2068 * -----|------------|------------|------------|------
2069 * last ready tprev t
2070 * time to run
2071 *
2072 * |-------- dt_wait --------|
2073 * |- dt_delay -|-- dt_run --|
2074 *
2075 * dt_run = run time of current task
2076 * dt_wait = time between last schedule out event for task and tprev
2077 * represents time spent off the cpu
2078 * dt_delay = time between wakeup and schedule-in of task
2079 */
2080
2081static void timehist_update_runtime_stats(struct thread_runtime *r,
2082 u64 t, u64 tprev)
2083{
2084 r->dt_delay = 0;
941bdea7
NK		 2085 r->dt_sleep = 0;
2086 r->dt_iowait = 0;
2087 r->dt_preempt = 0;
49394a2a 2088 r->dt_run = 0;
941bdea7 2089
49394a2a
DA		 2090 if (tprev) {
2091 r->dt_run = t - tprev;
2092 if (r->ready_to_run) {
2093 if (r->ready_to_run > tprev)
2094 pr_debug("time travel: wakeup time for task > previous sched_switch event\n");
2095 else
2096 r->dt_delay = tprev - r->ready_to_run;
2097 }
2098
2099 if (r->last_time > tprev)
2100 pr_debug("time travel: last sched out time for task > previous sched_switch event\n");
941bdea7
NK		 2101 else if (r->last_time) {
2102 u64 dt_wait = tprev - r->last_time;
2103
2104 if (r->last_state == TASK_RUNNING)
2105 r->dt_preempt = dt_wait;
2106 else if (r->last_state == TASK_UNINTERRUPTIBLE)
2107 r->dt_iowait = dt_wait;
2108 else
2109 r->dt_sleep = dt_wait;
2110 }
49394a2a
DA		 2111 }
2112
2113 update_stats(&r->run_stats, r->dt_run);
587782c5
NK		 2114
2115 r->total_run_time += r->dt_run;
2116 r->total_delay_time += r->dt_delay;
2117 r->total_sleep_time += r->dt_sleep;
2118 r->total_iowait_time += r->dt_iowait;
2119 r->total_preempt_time += r->dt_preempt;
49394a2a
DA		 2120}
2121
96039c7c
NK		 2122static bool is_idle_sample(struct perf_sample *sample,
2123 struct perf_evsel *evsel)
49394a2a
DA		 2124{
2125 /* pid 0 == swapper == idle task */
96039c7c
NK		 2126 if (strcmp(perf_evsel__name(evsel), "sched:sched_switch") == 0)
2127 return perf_evsel__intval(evsel, sample, "prev_pid") == 0;
49394a2a 2128
96039c7c
NK		 2129 return sample->pid == 0;
2130}
2131
2132static void save_task_callchain(struct perf_sched *sched,
2133 struct perf_sample *sample,
2134 struct perf_evsel *evsel,
2135 struct machine *machine)
2136{
2137 struct callchain_cursor *cursor = &callchain_cursor;
2138 struct thread *thread;
6c973c90
DA		 2139
2140 /* want main thread for process - has maps */
2141 thread = machine__findnew_thread(machine, sample->pid, sample->pid);
2142 if (thread == NULL) {
2143 pr_debug("Failed to get thread for pid %d.\n", sample->pid);
96039c7c 2144 return;
6c973c90
DA		 2145 }
2146
4c50563d 2147 if (!sched->show_callchain || sample->callchain == NULL)
96039c7c 2148 return;
6c973c90
DA		 2149
2150 if (thread__resolve_callchain(thread, cursor, evsel, sample,
8388deb3 2151 NULL, NULL, sched->max_stack + 2) != 0) {
bb963e16 2152 if (verbose > 0)
62d94b00 2153 pr_err("Failed to resolve callchain. Skipping\n");
6c973c90 2154
96039c7c 2155 return;
6c973c90 2156 }
cdeb01bf 2157
6c973c90 2158 callchain_cursor_commit(cursor);
cdeb01bf
NK		 2159
2160 while (true) {
2161 struct callchain_cursor_node *node;
2162 struct symbol *sym;
2163
2164 node = callchain_cursor_current(cursor);
2165 if (node == NULL)
2166 break;
2167
2168 sym = node->sym;
a7c3899c 2169 if (sym) {
cdeb01bf
NK		 2170 if (!strcmp(sym->name, "schedule") ||
2171 !strcmp(sym->name, "__schedule") ||
2172 !strcmp(sym->name, "preempt_schedule"))
2173 sym->ignore = 1;
2174 }
2175
2176 callchain_cursor_advance(cursor);
2177 }
49394a2a
DA		 2178}
2179
3bc2fa9c
NK		 2180static int init_idle_thread(struct thread *thread)
2181{
2182 struct idle_thread_runtime *itr;
2183
2184 thread__set_comm(thread, idle_comm, 0);
2185
2186 itr = zalloc(sizeof(*itr));
2187 if (itr == NULL)
2188 return -ENOMEM;
2189
2190 init_stats(&itr->tr.run_stats);
2191 callchain_init(&itr->callchain);
2192 callchain_cursor_reset(&itr->cursor);
2193 thread__set_priv(thread, itr);
2194
2195 return 0;
2196}
2197
49394a2a
DA		 2198/*
2199 * Track idle stats per cpu by maintaining a local thread
2200 * struct for the idle task on each cpu.
2201 */
2202static int init_idle_threads(int ncpu)
2203{
3bc2fa9c 2204 int i, ret;
49394a2a
DA		 2205
2206 idle_threads = zalloc(ncpu * sizeof(struct thread *));
2207 if (!idle_threads)
2208 return -ENOMEM;
2209
b336352b 2210 idle_max_cpu = ncpu;
49394a2a
DA		 2211
2212 /* allocate the actual thread struct if needed */
2213 for (i = 0; i < ncpu; ++i) {
2214 idle_threads[i] = thread__new(0, 0);
2215 if (idle_threads[i] == NULL)
2216 return -ENOMEM;
2217
3bc2fa9c
NK		 2218 ret = init_idle_thread(idle_threads[i]);
2219 if (ret < 0)
2220 return ret;
49394a2a
DA		 2221 }
2222
2223 return 0;
2224}
2225
2226static void free_idle_threads(void)
2227{
2228 int i;
2229
2230 if (idle_threads == NULL)
2231 return;
2232
b336352b 2233 for (i = 0; i < idle_max_cpu; ++i) {
49394a2a
DA		 2234 if ((idle_threads[i]))
2235 thread__delete(idle_threads[i]);
2236 }
2237
2238 free(idle_threads);
2239}
2240
2241static struct thread *get_idle_thread(int cpu)
2242{
2243 /*
2244 * expand/allocate array of pointers to local thread
2245 * structs if needed
2246 */
2247 if ((cpu >= idle_max_cpu) || (idle_threads == NULL)) {
2248 int i, j = __roundup_pow_of_two(cpu+1);
2249 void *p;
2250
2251 p = realloc(idle_threads, j * sizeof(struct thread *));
2252 if (!p)
2253 return NULL;
2254
2255 idle_threads = (struct thread **) p;
b336352b 2256 for (i = idle_max_cpu; i < j; ++i)
49394a2a
DA		 2257 idle_threads[i] = NULL;
2258
2259 idle_max_cpu = j;
2260 }
2261
2262 /* allocate a new thread struct if needed */
2263 if (idle_threads[cpu] == NULL) {
2264 idle_threads[cpu] = thread__new(0, 0);
2265
2266 if (idle_threads[cpu]) {
3bc2fa9c
NK		 2267 if (init_idle_thread(idle_threads[cpu]) < 0)
2268 return NULL;
49394a2a
DA		 2269 }
2270 }
2271
2272 return idle_threads[cpu];
2273}
2274
4c50563d
ACM		 2275static void save_idle_callchain(struct perf_sched *sched,
2276 struct idle_thread_runtime *itr,
699b5b92
NK		 2277 struct perf_sample *sample)
2278{
4c50563d 2279 if (!sched->show_callchain || sample->callchain == NULL)
699b5b92
NK		 2280 return;
2281
2282 callchain_cursor__copy(&itr->cursor, &callchain_cursor);
2283}
2284
6c973c90
DA		 2285static struct thread *timehist_get_thread(struct perf_sched *sched,
2286 struct perf_sample *sample,
49394a2a
DA		 2287 struct machine *machine,
2288 struct perf_evsel *evsel)
2289{
2290 struct thread *thread;
2291
96039c7c 2292 if (is_idle_sample(sample, evsel)) {
49394a2a
DA		 2293 thread = get_idle_thread(sample->cpu);
2294 if (thread == NULL)
2295 pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
2296
2297 } else {
5d92d96a
NK		 2298 /* there were samples with tid 0 but non-zero pid */
2299 thread = machine__findnew_thread(machine, sample->pid,
2300 sample->tid ?: sample->pid);
49394a2a
DA		 2301 if (thread == NULL) {
2302 pr_debug("Failed to get thread for tid %d. skipping sample.\n",
2303 sample->tid);
2304 }
96039c7c
NK		 2305
2306 save_task_callchain(sched, sample, evsel, machine);
699b5b92
NK		 2307 if (sched->idle_hist) {
2308 struct thread *idle;
2309 struct idle_thread_runtime *itr;
2310
2311 idle = get_idle_thread(sample->cpu);
2312 if (idle == NULL) {
2313 pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
2314 return NULL;
2315 }
2316
2317 itr = thread__priv(idle);
2318 if (itr == NULL)
2319 return NULL;
2320
2321 itr->last_thread = thread;
2322
2323 /* copy task callchain when entering to idle */
2324 if (perf_evsel__intval(evsel, sample, "next_pid") == 0)
4c50563d 2325 save_idle_callchain(sched, itr, sample);
699b5b92 2326 }
49394a2a
DA		 2327 }
2328
2329 return thread;
2330}
2331
52df138c 2332static bool timehist_skip_sample(struct perf_sched *sched,
a4b2b6f5
NK		 2333 struct thread *thread,
2334 struct perf_evsel *evsel,
2335 struct perf_sample *sample)
49394a2a
DA		 2336{
2337 bool rc = false;
2338
52df138c 2339 if (thread__is_filtered(thread)) {
49394a2a 2340 rc = true;
52df138c
DA		 2341 sched->skipped_samples++;
2342 }
49394a2a 2343
a4b2b6f5
NK		 2344 if (sched->idle_hist) {
2345 if (strcmp(perf_evsel__name(evsel), "sched:sched_switch"))
2346 rc = true;
2347 else if (perf_evsel__intval(evsel, sample, "prev_pid") != 0 &&
2348 perf_evsel__intval(evsel, sample, "next_pid") != 0)
2349 rc = true;
2350 }
2351
49394a2a
DA		 2352 return rc;
2353}
2354
fc1469f1 2355static void timehist_print_wakeup_event(struct perf_sched *sched,
a4b2b6f5 2356 struct perf_evsel *evsel,
fc1469f1
DA		 2357 struct perf_sample *sample,
2358 struct machine *machine,
2359 struct thread *awakened)
2360{
2361 struct thread *thread;
2362 char tstr[64];
2363
2364 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2365 if (thread == NULL)
2366 return;
2367
2368 /* show wakeup unless both awakee and awaker are filtered */
a4b2b6f5
NK		 2369 if (timehist_skip_sample(sched, thread, evsel, sample) &&
2370 timehist_skip_sample(sched, awakened, evsel, sample)) {
fc1469f1
DA		 2371 return;
2372 }
2373
2374 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2375 printf("%15s [%04d] ", tstr, sample->cpu);
a407b067
DA		 2376 if (sched->show_cpu_visual)
2377 printf(" %*s ", sched->max_cpu + 1, "");
fc1469f1
DA		 2378
2379 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2380
2381 /* dt spacer */
2382 printf(" %9s %9s %9s ", "", "", "");
2383
2384 printf("awakened: %s", timehist_get_commstr(awakened));
2385
2386 printf("\n");
2387}
2388
2389static int timehist_sched_wakeup_event(struct perf_tool *tool,
49394a2a
DA		 2390 union perf_event *event __maybe_unused,
2391 struct perf_evsel *evsel,
2392 struct perf_sample *sample,
2393 struct machine *machine)
2394{
fc1469f1 2395 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
49394a2a
DA		 2396 struct thread *thread;
2397 struct thread_runtime *tr = NULL;
2398 /* want pid of awakened task not pid in sample */
2399 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2400
2401 thread = machine__findnew_thread(machine, 0, pid);
2402 if (thread == NULL)
2403 return -1;
2404
2405 tr = thread__get_runtime(thread);
2406 if (tr == NULL)
2407 return -1;
2408
2409 if (tr->ready_to_run == 0)
2410 tr->ready_to_run = sample->time;
2411
fc1469f1 2412 /* show wakeups if requested */
853b7407
DA		 2413 if (sched->show_wakeups &&
2414 !perf_time__skip_sample(&sched->ptime, sample->time))
a4b2b6f5 2415 timehist_print_wakeup_event(sched, evsel, sample, machine, thread);
fc1469f1 2416
49394a2a
DA		 2417 return 0;
2418}
2419
350f54fa
DA		 2420static void timehist_print_migration_event(struct perf_sched *sched,
2421 struct perf_evsel *evsel,
2422 struct perf_sample *sample,
2423 struct machine *machine,
2424 struct thread *migrated)
2425{
2426 struct thread *thread;
2427 char tstr[64];
2428 u32 max_cpus = sched->max_cpu + 1;
2429 u32 ocpu, dcpu;
2430
2431 if (sched->summary_only)
2432 return;
2433
2434 max_cpus = sched->max_cpu + 1;
2435 ocpu = perf_evsel__intval(evsel, sample, "orig_cpu");
2436 dcpu = perf_evsel__intval(evsel, sample, "dest_cpu");
2437
2438 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2439 if (thread == NULL)
2440 return;
2441
a4b2b6f5
NK		 2442 if (timehist_skip_sample(sched, thread, evsel, sample) &&
2443 timehist_skip_sample(sched, migrated, evsel, sample)) {
350f54fa
DA		 2444 return;
2445 }
2446
2447 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2448 printf("%15s [%04d] ", tstr, sample->cpu);
2449
2450 if (sched->show_cpu_visual) {
2451 u32 i;
2452 char c;
2453
2454 printf(" ");
2455 for (i = 0; i < max_cpus; ++i) {
2456 c = (i == sample->cpu) ? 'm' : ' ';
2457 printf("%c", c);
2458 }
2459 printf(" ");
2460 }
2461
2462 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2463
2464 /* dt spacer */
2465 printf(" %9s %9s %9s ", "", "", "");
2466
2467 printf("migrated: %s", timehist_get_commstr(migrated));
2468 printf(" cpu %d => %d", ocpu, dcpu);
2469
2470 printf("\n");
2471}
2472
2473static int timehist_migrate_task_event(struct perf_tool *tool,
2474 union perf_event *event __maybe_unused,
2475 struct perf_evsel *evsel,
2476 struct perf_sample *sample,
2477 struct machine *machine)
2478{
2479 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2480 struct thread *thread;
2481 struct thread_runtime *tr = NULL;
2482 /* want pid of migrated task not pid in sample */
2483 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2484
2485 thread = machine__findnew_thread(machine, 0, pid);
2486 if (thread == NULL)
2487 return -1;
2488
2489 tr = thread__get_runtime(thread);
2490 if (tr == NULL)
2491 return -1;
2492
2493 tr->migrations++;
2494
2495 /* show migrations if requested */
2496 timehist_print_migration_event(sched, evsel, sample, machine, thread);
2497
2498 return 0;
2499}
2500
52df138c 2501static int timehist_sched_change_event(struct perf_tool *tool,
49394a2a
DA		 2502 union perf_event *event,
2503 struct perf_evsel *evsel,
2504 struct perf_sample *sample,
2505 struct machine *machine)
2506{
fc1469f1 2507 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
853b7407 2508 struct perf_time_interval *ptime = &sched->ptime;
49394a2a
DA		 2509 struct addr_location al;
2510 struct thread *thread;
2511 struct thread_runtime *tr = NULL;
853b7407 2512 u64 tprev, t = sample->time;
49394a2a 2513 int rc = 0;
414e050c
NK		 2514 int state = perf_evsel__intval(evsel, sample, "prev_state");
2515
49394a2a
DA		 2516
2517 if (machine__resolve(machine, &al, sample) < 0) {
2518 pr_err("problem processing %d event. skipping it\n",
2519 event->header.type);
2520 rc = -1;
2521 goto out;
2522 }
2523
6c973c90 2524 thread = timehist_get_thread(sched, sample, machine, evsel);
49394a2a
DA		 2525 if (thread == NULL) {
2526 rc = -1;
2527 goto out;
2528 }
2529
a4b2b6f5 2530 if (timehist_skip_sample(sched, thread, evsel, sample))
49394a2a
DA		 2531 goto out;
2532
2533 tr = thread__get_runtime(thread);
2534 if (tr == NULL) {
2535 rc = -1;
2536 goto out;
2537 }
2538
2539 tprev = perf_evsel__get_time(evsel, sample->cpu);
2540
853b7407
DA		 2541 /*
2542 * If start time given:
2543 * - sample time is under window user cares about - skip sample
2544 * - tprev is under window user cares about - reset to start of window
2545 */
2546 if (ptime->start && ptime->start > t)
2547 goto out;
2548
bdd75729 2549 if (tprev && ptime->start > tprev)
853b7407
DA		 2550 tprev = ptime->start;
2551
2552 /*
2553 * If end time given:
2554 * - previous sched event is out of window - we are done
2555 * - sample time is beyond window user cares about - reset it
2556 * to close out stats for time window interest
2557 */
2558 if (ptime->end) {
2559 if (tprev > ptime->end)
2560 goto out;
2561
2562 if (t > ptime->end)
2563 t = ptime->end;
2564 }
2565
07235f84
NK		 2566 if (!sched->idle_hist || thread->tid == 0) {
2567 timehist_update_runtime_stats(tr, t, tprev);
2568
2569 if (sched->idle_hist) {
2570 struct idle_thread_runtime *itr = (void *)tr;
2571 struct thread_runtime *last_tr;
2572
2573 BUG_ON(thread->tid != 0);
2574
2575 if (itr->last_thread == NULL)
2576 goto out;
2577
2578 /* add current idle time as last thread's runtime */
2579 last_tr = thread__get_runtime(itr->last_thread);
2580 if (last_tr == NULL)
2581 goto out;
2582
2583 timehist_update_runtime_stats(last_tr, t, tprev);
2584 /*
2585 * remove delta time of last thread as it's not updated
2586 * and otherwise it will show an invalid value next
2587 * time. we only care total run time and run stat.
2588 */
2589 last_tr->dt_run = 0;
07235f84 2590 last_tr->dt_delay = 0;
941bdea7
NK		 2591 last_tr->dt_sleep = 0;
2592 last_tr->dt_iowait = 0;
2593 last_tr->dt_preempt = 0;
07235f84 2594
ba957ebb
NK		 2595 if (itr->cursor.nr)
2596 callchain_append(&itr->callchain, &itr->cursor, t - tprev);
2597
07235f84
NK		 2598 itr->last_thread = NULL;
2599 }
2600 }
853b7407 2601
52df138c 2602 if (!sched->summary_only)
292c4a8f 2603 timehist_print_sample(sched, evsel, sample, &al, thread, t, state);
49394a2a
DA		 2604
2605out:
9396c9cb
NK		 2606 if (sched->hist_time.start == 0 && t >= ptime->start)
2607 sched->hist_time.start = t;
2608 if (ptime->end == 0 || t <= ptime->end)
2609 sched->hist_time.end = t;
2610
49394a2a
DA		 2611 if (tr) {
2612 /* time of this sched_switch event becomes last time task seen */
2613 tr->last_time = sample->time;
2614
941bdea7 2615 /* last state is used to determine where to account wait time */
414e050c 2616 tr->last_state = state;
941bdea7 2617
49394a2a
DA		 2618 /* sched out event for task so reset ready to run time */
2619 tr->ready_to_run = 0;
2620 }
2621
2622 perf_evsel__save_time(evsel, sample->time, sample->cpu);
2623
2624 return rc;
2625}
2626
2627static int timehist_sched_switch_event(struct perf_tool *tool,
2628 union perf_event *event,
2629 struct perf_evsel *evsel,
2630 struct perf_sample *sample,
2631 struct machine *machine __maybe_unused)
2632{
2633 return timehist_sched_change_event(tool, event, evsel, sample, machine);
2634}
2635
2636static int process_lost(struct perf_tool *tool __maybe_unused,
2637 union perf_event *event,
2638 struct perf_sample *sample,
2639 struct machine *machine __maybe_unused)
2640{
2641 char tstr[64];
2642
2643 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2644 printf("%15s ", tstr);
2645 printf("lost %" PRIu64 " events on cpu %d\n", event->lost.lost, sample->cpu);
2646
2647 return 0;
2648}
2649
2650
52df138c
DA		 2651static void print_thread_runtime(struct thread *t,
2652 struct thread_runtime *r)
2653{
2654 double mean = avg_stats(&r->run_stats);
2655 float stddev;
2656
2657 printf("%*s %5d %9" PRIu64 " ",
2658 comm_width, timehist_get_commstr(t), t->ppid,
2659 (u64) r->run_stats.n);
2660
2661 print_sched_time(r->total_run_time, 8);
2662 stddev = rel_stddev_stats(stddev_stats(&r->run_stats), mean);
2663 print_sched_time(r->run_stats.min, 6);
2664 printf(" ");
2665 print_sched_time((u64) mean, 6);
2666 printf(" ");
2667 print_sched_time(r->run_stats.max, 6);
2668 printf(" ");
2669 printf("%5.2f", stddev);
350f54fa 2670 printf(" %5" PRIu64, r->migrations);
52df138c
DA		 2671 printf("\n");
2672}
2673
587782c5
NK		 2674static void print_thread_waittime(struct thread *t,
2675 struct thread_runtime *r)
2676{
2677 printf("%*s %5d %9" PRIu64 " ",
2678 comm_width, timehist_get_commstr(t), t->ppid,
2679 (u64) r->run_stats.n);
2680
2681 print_sched_time(r->total_run_time, 8);
2682 print_sched_time(r->total_sleep_time, 6);
2683 printf(" ");
2684 print_sched_time(r->total_iowait_time, 6);
2685 printf(" ");
2686 print_sched_time(r->total_preempt_time, 6);
2687 printf(" ");
2688 print_sched_time(r->total_delay_time, 6);
2689 printf("\n");
2690}
2691
52df138c 2692struct total_run_stats {
587782c5 2693 struct perf_sched *sched;
52df138c
DA		 2694 u64 sched_count;
2695 u64 task_count;
2696 u64 total_run_time;
2697};
2698
2699static int __show_thread_runtime(struct thread *t, void *priv)
2700{
2701 struct total_run_stats *stats = priv;
2702 struct thread_runtime *r;
2703
2704 if (thread__is_filtered(t))
2705 return 0;
2706
2707 r = thread__priv(t);
2708 if (r && r->run_stats.n) {
2709 stats->task_count++;
2710 stats->sched_count += r->run_stats.n;
2711 stats->total_run_time += r->total_run_time;
587782c5
NK		 2712
2713 if (stats->sched->show_state)
2714 print_thread_waittime(t, r);
2715 else
2716 print_thread_runtime(t, r);
52df138c
DA		 2717 }
2718
2719 return 0;
2720}
2721
2722static int show_thread_runtime(struct thread *t, void *priv)
2723{
2724 if (t->dead)
2725 return 0;
2726
2727 return __show_thread_runtime(t, priv);
2728}
2729
2730static int show_deadthread_runtime(struct thread *t, void *priv)
2731{
2732 if (!t->dead)
2733 return 0;
2734
2735 return __show_thread_runtime(t, priv);
2736}
2737
ba957ebb
NK		 2738static size_t callchain__fprintf_folded(FILE *fp, struct callchain_node *node)
2739{
2740 const char *sep = " <- ";
2741 struct callchain_list *chain;
2742 size_t ret = 0;
2743 char bf[1024];
2744 bool first;
2745
2746 if (node == NULL)
2747 return 0;
2748
2749 ret = callchain__fprintf_folded(fp, node->parent);
2750 first = (ret == 0);
2751
2752 list_for_each_entry(chain, &node->val, list) {
2753 if (chain->ip >= PERF_CONTEXT_MAX)
2754 continue;
2755 if (chain->ms.sym && chain->ms.sym->ignore)
2756 continue;
2757 ret += fprintf(fp, "%s%s", first ? "" : sep,
2758 callchain_list__sym_name(chain, bf, sizeof(bf),
2759 false));
2760 first = false;
2761 }
2762
2763 return ret;
2764}
2765
cb4c13a5 2766static size_t timehist_print_idlehist_callchain(struct rb_root_cached *root)
ba957ebb
NK		 2767{
2768 size_t ret = 0;
2769 FILE *fp = stdout;
2770 struct callchain_node *chain;
cb4c13a5 2771 struct rb_node *rb_node = rb_first_cached(root);
ba957ebb
NK		 2772
2773 printf(" %16s %8s %s\n", "Idle time (msec)", "Count", "Callchains");
2774 printf(" %.16s %.8s %.50s\n", graph_dotted_line, graph_dotted_line,
2775 graph_dotted_line);
2776
2777 while (rb_node) {
2778 chain = rb_entry(rb_node, struct callchain_node, rb_node);
2779 rb_node = rb_next(rb_node);
2780
2781 ret += fprintf(fp, " ");
2782 print_sched_time(chain->hit, 12);
2783 ret += 16; /* print_sched_time returns 2nd arg + 4 */
2784 ret += fprintf(fp, " %8d ", chain->count);
2785 ret += callchain__fprintf_folded(fp, chain);
2786 ret += fprintf(fp, "\n");
2787 }
2788
2789 return ret;
2790}
2791
52df138c
DA		 2792static void timehist_print_summary(struct perf_sched *sched,
2793 struct perf_session *session)
2794{
2795 struct machine *m = &session->machines.host;
2796 struct total_run_stats totals;
2797 u64 task_count;
2798 struct thread *t;
2799 struct thread_runtime *r;
2800 int i;
9396c9cb 2801 u64 hist_time = sched->hist_time.end - sched->hist_time.start;
52df138c
DA		 2802
2803 memset(&totals, 0, sizeof(totals));
587782c5 2804 totals.sched = sched;
52df138c 2805
07235f84
NK		 2806 if (sched->idle_hist) {
2807 printf("\nIdle-time summary\n");
2808 printf("%*s parent sched-out ", comm_width, "comm");
2809 printf(" idle-time min-idle avg-idle max-idle stddev migrations\n");
587782c5
NK		 2810 } else if (sched->show_state) {
2811 printf("\nWait-time summary\n");
2812 printf("%*s parent sched-in ", comm_width, "comm");
2813 printf(" run-time sleep iowait preempt delay\n");
07235f84
NK		 2814 } else {
2815 printf("\nRuntime summary\n");
2816 printf("%*s parent sched-in ", comm_width, "comm");
2817 printf(" run-time min-run avg-run max-run stddev migrations\n");
2818 }
52df138c 2819 printf("%*s (count) ", comm_width, "");
587782c5
NK		 2820 printf(" (msec) (msec) (msec) (msec) %s\n",
2821 sched->show_state ? "(msec)" : "%");
350f54fa 2822 printf("%.117s\n", graph_dotted_line);
52df138c
DA		 2823
2824 machine__for_each_thread(m, show_thread_runtime, &totals);
2825 task_count = totals.task_count;
2826 if (!task_count)
2827 printf("<no still running tasks>\n");
2828
2829 printf("\nTerminated tasks:\n");
2830 machine__for_each_thread(m, show_deadthread_runtime, &totals);
2831 if (task_count == totals.task_count)
2832 printf("<no terminated tasks>\n");
2833
2834 /* CPU idle stats not tracked when samples were skipped */
07235f84 2835 if (sched->skipped_samples && !sched->idle_hist)
52df138c
DA		 2836 return;
2837
2838 printf("\nIdle stats:\n");
b336352b 2839 for (i = 0; i < idle_max_cpu; ++i) {
52df138c
DA		 2840 t = idle_threads[i];
2841 if (!t)
2842 continue;
2843
2844 r = thread__priv(t);
2845 if (r && r->run_stats.n) {
2846 totals.sched_count += r->run_stats.n;
2847 printf(" CPU %2d idle for ", i);
2848 print_sched_time(r->total_run_time, 6);
9396c9cb 2849 printf(" msec (%6.2f%%)\n", 100.0 * r->total_run_time / hist_time);
52df138c
DA		 2850 } else
2851 printf(" CPU %2d idle entire time window\n", i);
2852 }
2853
4c50563d 2854 if (sched->idle_hist && sched->show_callchain) {
ba957ebb
NK		 2855 callchain_param.mode = CHAIN_FOLDED;
2856 callchain_param.value = CCVAL_PERIOD;
2857
2858 callchain_register_param(&callchain_param);
2859
2860 printf("\nIdle stats by callchain:\n");
2861 for (i = 0; i < idle_max_cpu; ++i) {
2862 struct idle_thread_runtime *itr;
2863
2864 t = idle_threads[i];
2865 if (!t)
2866 continue;
2867
2868 itr = thread__priv(t);
2869 if (itr == NULL)
2870 continue;
2871
cb4c13a5 2872 callchain_param.sort(&itr->sorted_root.rb_root, &itr->callchain,
ba957ebb
NK		 2873 0, &callchain_param);
2874
2875 printf(" CPU %2d:", i);
2876 print_sched_time(itr->tr.total_run_time, 6);
2877 printf(" msec\n");
2878 timehist_print_idlehist_callchain(&itr->sorted_root);
2879 printf("\n");
2880 }
2881 }
2882
52df138c
DA		 2883 printf("\n"
2884 " Total number of unique tasks: %" PRIu64 "\n"
9396c9cb 2885 "Total number of context switches: %" PRIu64 "\n",
52df138c
DA		 2886 totals.task_count, totals.sched_count);
2887
9396c9cb 2888 printf(" Total run time (msec): ");
52df138c
DA		 2889 print_sched_time(totals.total_run_time, 2);
2890 printf("\n");
9396c9cb
NK		 2891
2892 printf(" Total scheduling time (msec): ");
2893 print_sched_time(hist_time, 2);
2894 printf(" (x %d)\n", sched->max_cpu);
52df138c
DA		 2895}
2896
49394a2a
DA		 2897typedef int (*sched_handler)(struct perf_tool *tool,
2898 union perf_event *event,
2899 struct perf_evsel *evsel,
2900 struct perf_sample *sample,
2901 struct machine *machine);
2902
2903static int perf_timehist__process_sample(struct perf_tool *tool,
2904 union perf_event *event,
2905 struct perf_sample *sample,
2906 struct perf_evsel *evsel,
2907 struct machine *machine)
2908{
2909 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2910 int err = 0;
2911 int this_cpu = sample->cpu;
2912
2913 if (this_cpu > sched->max_cpu)
2914 sched->max_cpu = this_cpu;
2915
2916 if (evsel->handler != NULL) {
2917 sched_handler f = evsel->handler;
2918
2919 err = f(tool, event, evsel, sample, machine);
2920 }
2921
2922 return err;
2923}
2924
6c973c90
DA		 2925static int timehist_check_attr(struct perf_sched *sched,
2926 struct perf_evlist *evlist)
2927{
2928 struct perf_evsel *evsel;
2929 struct evsel_runtime *er;
2930
2931 list_for_each_entry(evsel, &evlist->entries, node) {
2932 er = perf_evsel__get_runtime(evsel);
2933 if (er == NULL) {
2934 pr_err("Failed to allocate memory for evsel runtime data\n");
2935 return -1;
2936 }
2937
27de9b2b 2938 if (sched->show_callchain && !evsel__has_callchain(evsel)) {
6c973c90
DA		 2939 pr_info("Samples do not have callchains.\n");
2940 sched->show_callchain = 0;
2941 symbol_conf.use_callchain = 0;
2942 }
2943 }
2944
2945 return 0;
2946}
2947
49394a2a
DA		 2948static int perf_sched__timehist(struct perf_sched *sched)
2949{
2950 const struct perf_evsel_str_handler handlers[] = {
2951 { "sched:sched_switch", timehist_sched_switch_event, },
2952 { "sched:sched_wakeup", timehist_sched_wakeup_event, },
2953 { "sched:sched_wakeup_new", timehist_sched_wakeup_event, },
2954 };
350f54fa
DA		 2955 const struct perf_evsel_str_handler migrate_handlers[] = {
2956 { "sched:sched_migrate_task", timehist_migrate_task_event, },
2957 };
8ceb41d7 2958 struct perf_data data = {
2d4f2799
JO		 2959 .path = input_name,
2960 .mode = PERF_DATA_MODE_READ,
2961 .force = sched->force,
49394a2a
DA		 2962 };
2963
2964 struct perf_session *session;
52df138c 2965 struct perf_evlist *evlist;
49394a2a
DA		 2966 int err = -1;
2967
2968 /*
2969 * event handlers for timehist option
2970 */
2971 sched->tool.sample = perf_timehist__process_sample;
2972 sched->tool.mmap = perf_event__process_mmap;
2973 sched->tool.comm = perf_event__process_comm;
2974 sched->tool.exit = perf_event__process_exit;
2975 sched->tool.fork = perf_event__process_fork;
2976 sched->tool.lost = process_lost;
2977 sched->tool.attr = perf_event__process_attr;
2978 sched->tool.tracing_data = perf_event__process_tracing_data;
2979 sched->tool.build_id = perf_event__process_build_id;
2980
2981 sched->tool.ordered_events = true;
2982 sched->tool.ordering_requires_timestamps = true;
2983
6c973c90
DA		 2984 symbol_conf.use_callchain = sched->show_callchain;
2985
8ceb41d7 2986 session = perf_session__new(&data, false, &sched->tool);
49394a2a
DA		 2987 if (session == NULL)
2988 return -ENOMEM;
2989
52df138c
DA		 2990 evlist = session->evlist;
2991
49394a2a
DA		 2992 symbol__init(&session->header.env);
2993
853b7407
DA		 2994 if (perf_time__parse_str(&sched->ptime, sched->time_str) != 0) {
2995 pr_err("Invalid time string\n");
2996 return -EINVAL;
2997 }
2998
6c973c90
DA		 2999 if (timehist_check_attr(sched, evlist) != 0)
3000 goto out;
3001
49394a2a
DA		 3002 setup_pager();
3003
3004 /* setup per-evsel handlers */
3005 if (perf_session__set_tracepoints_handlers(session, handlers))
3006 goto out;
3007
f45bf8d3
DA		 3008 /* sched_switch event at a minimum needs to exist */
3009 if (!perf_evlist__find_tracepoint_by_name(session->evlist,
3010 "sched:sched_switch")) {
3011 pr_err("No sched_switch events found. Have you run 'perf sched record'?\n");
49394a2a 3012 goto out;
f45bf8d3 3013 }
49394a2a 3014
350f54fa
DA		 3015 if (sched->show_migrations &&
3016 perf_session__set_tracepoints_handlers(session, migrate_handlers))
3017 goto out;
3018
49394a2a
DA		 3019 /* pre-allocate struct for per-CPU idle stats */
3020 sched->max_cpu = session->header.env.nr_cpus_online;
3021 if (sched->max_cpu == 0)
3022 sched->max_cpu = 4;
3023 if (init_idle_threads(sched->max_cpu))
3024 goto out;
3025
52df138c
DA		 3026 /* summary_only implies summary option, but don't overwrite summary if set */
3027 if (sched->summary_only)
3028 sched->summary = sched->summary_only;
3029
3030 if (!sched->summary_only)
a407b067 3031 timehist_header(sched);
49394a2a
DA		 3032
3033 err = perf_session__process_events(session);
3034 if (err) {
3035 pr_err("Failed to process events, error %d", err);
3036 goto out;
3037 }
3038
52df138c
DA		 3039 sched->nr_events = evlist->stats.nr_events[0];
3040 sched->nr_lost_events = evlist->stats.total_lost;
3041 sched->nr_lost_chunks = evlist->stats.nr_events[PERF_RECORD_LOST];
3042
3043 if (sched->summary)
3044 timehist_print_summary(sched, session);
3045
49394a2a
DA		 3046out:
3047 free_idle_threads();
3048 perf_session__delete(session);
3049
3050 return err;
3051}
3052
3053
0e9b07e5 3054static void print_bad_events(struct perf_sched *sched)
0ec04e16 3055{
0e9b07e5 3056 if (sched->nr_unordered_timestamps && sched->nr_timestamps) {
0ec04e16 3057 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
0e9b07e5
ACM		 3058 (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0,
3059 sched->nr_unordered_timestamps, sched->nr_timestamps);
0ec04e16 3060 }
0e9b07e5 3061 if (sched->nr_lost_events && sched->nr_events) {
0ec04e16 3062 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
0e9b07e5
ACM		 3063 (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
3064 sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
0ec04e16 3065 }
0e9b07e5 3066 if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
0ec04e16 3067 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
0e9b07e5
ACM		 3068 (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
3069 sched->nr_context_switch_bugs, sched->nr_timestamps);
3070 if (sched->nr_lost_events)
0ec04e16
IM		 3071 printf(" (due to lost events?)");
3072 printf("\n");
3073 }
3074}
3075
cb4c13a5 3076static void __merge_work_atoms(struct rb_root_cached *root, struct work_atoms *data)
2f80dd44 3077{
cb4c13a5 3078 struct rb_node **new = &(root->rb_root.rb_node), *parent = NULL;
2f80dd44
JB		 3079 struct work_atoms *this;
3080 const char *comm = thread__comm_str(data->thread), *this_comm;
cb4c13a5 3081 bool leftmost = true;
2f80dd44
JB		 3082
3083 while (*new) {
3084 int cmp;
3085
3086 this = container_of(*new, struct work_atoms, node);
3087 parent = *new;
3088
3089 this_comm = thread__comm_str(this->thread);
3090 cmp = strcmp(comm, this_comm);
3091 if (cmp > 0) {
3092 new = &((*new)->rb_left);
3093 } else if (cmp < 0) {
3094 new = &((*new)->rb_right);
cb4c13a5 3095 leftmost = false;
2f80dd44
JB		 3096 } else {
3097 this->num_merged++;
3098 this->total_runtime += data->total_runtime;
3099 this->nb_atoms += data->nb_atoms;
3100 this->total_lat += data->total_lat;
3101 list_splice(&data->work_list, &this->work_list);
3102 if (this->max_lat < data->max_lat) {
3103 this->max_lat = data->max_lat;
3104 this->max_lat_at = data->max_lat_at;
3105 }
3106 zfree(&data);
3107 return;
3108 }
3109 }
3110
3111 data->num_merged++;
3112 rb_link_node(&data->node, parent, new);
cb4c13a5 3113 rb_insert_color_cached(&data->node, root, leftmost);
2f80dd44
JB		 3114}
3115
3116static void perf_sched__merge_lat(struct perf_sched *sched)
3117{
3118 struct work_atoms *data;
3119 struct rb_node *node;
3120
3121 if (sched->skip_merge)
3122 return;
3123
cb4c13a5
DB		 3124 while ((node = rb_first_cached(&sched->atom_root))) {
3125 rb_erase_cached(node, &sched->atom_root);
2f80dd44
JB		 3126 data = rb_entry(node, struct work_atoms, node);
3127 __merge_work_atoms(&sched->merged_atom_root, data);
3128 }
3129}
3130
0e9b07e5 3131static int perf_sched__lat(struct perf_sched *sched)
0ec04e16
IM		 3132{
3133 struct rb_node *next;
3134
3135 setup_pager();
ad9def7c 3136
ae536acf 3137 if (perf_sched__read_events(sched))
a116e05d 3138 return -1;
ad9def7c 3139
2f80dd44 3140 perf_sched__merge_lat(sched);
0e9b07e5 3141 perf_sched__sort_lat(sched);
0ec04e16 3142
80790e0b
RR		 3143 printf("\n -----------------------------------------------------------------------------------------------------------------\n");
3144 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
3145 printf(" -----------------------------------------------------------------------------------------------------------------\n");
0ec04e16 3146
cb4c13a5 3147 next = rb_first_cached(&sched->sorted_atom_root);
0ec04e16
IM		 3148
3149 while (next) {
3150 struct work_atoms *work_list;
3151
3152 work_list = rb_entry(next, struct work_atoms, node);
0e9b07e5 3153 output_lat_thread(sched, work_list);
0ec04e16 3154 next = rb_next(next);
ae536acf 3155 thread__zput(work_list->thread);
0ec04e16
IM		 3156 }
3157
80790e0b 3158 printf(" -----------------------------------------------------------------------------------------------------------------\n");
9486aa38 3159 printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n",
4fc76e49 3160 (double)sched->all_runtime / NSEC_PER_MSEC, sched->all_count);
0ec04e16
IM		 3161
3162 printf(" ---------------------------------------------------\n");
3163
0e9b07e5 3164 print_bad_events(sched);
0ec04e16
IM		 3165 printf("\n");
3166
a116e05d 3167 return 0;
0ec04e16
IM		 3168}
3169
99623c62
JO		 3170static int setup_map_cpus(struct perf_sched *sched)
3171{
73643bb6
JO		 3172 struct cpu_map *map;
3173
99623c62
JO		 3174 sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
3175
3176 if (sched->map.comp) {
3177 sched->map.comp_cpus = zalloc(sched->max_cpu * sizeof(int));
cf294f24
JO		 3178 if (!sched->map.comp_cpus)
3179 return -1;
99623c62
JO		 3180 }
3181
73643bb6
JO		 3182 if (!sched->map.cpus_str)
3183 return 0;
3184
3185 map = cpu_map__new(sched->map.cpus_str);
3186 if (!map) {
3187 pr_err("failed to get cpus map from %s\n", sched->map.cpus_str);
3188 return -1;
3189 }
3190
3191 sched->map.cpus = map;
99623c62
JO		 3192 return 0;
3193}
3194
a151a37a
JO		 3195static int setup_color_pids(struct perf_sched *sched)
3196{
3197 struct thread_map *map;
3198
3199 if (!sched->map.color_pids_str)
3200 return 0;
3201
3202 map = thread_map__new_by_tid_str(sched->map.color_pids_str);
3203 if (!map) {
3204 pr_err("failed to get thread map from %s\n", sched->map.color_pids_str);
3205 return -1;
3206 }
3207
3208 sched->map.color_pids = map;
3209 return 0;
3210}
3211
cf294f24
JO		 3212static int setup_color_cpus(struct perf_sched *sched)
3213{
3214 struct cpu_map *map;
3215
3216 if (!sched->map.color_cpus_str)
3217 return 0;
3218
3219 map = cpu_map__new(sched->map.color_cpus_str);
3220 if (!map) {
3221 pr_err("failed to get thread map from %s\n", sched->map.color_cpus_str);
3222 return -1;
3223 }
3224
3225 sched->map.color_cpus = map;
3226 return 0;
3227}
3228
0e9b07e5 3229static int perf_sched__map(struct perf_sched *sched)
0ec04e16 3230{
99623c62
JO		 3231 if (setup_map_cpus(sched))
3232 return -1;
40749d0f 3233
a151a37a
JO		 3234 if (setup_color_pids(sched))
3235 return -1;
3236
cf294f24
JO		 3237 if (setup_color_cpus(sched))
3238 return -1;
3239
0ec04e16 3240 setup_pager();
ae536acf 3241 if (perf_sched__read_events(sched))
a116e05d 3242 return -1;
0e9b07e5 3243 print_bad_events(sched);
a116e05d 3244 return 0;
0ec04e16
IM		 3245}
3246
0e9b07e5 3247static int perf_sched__replay(struct perf_sched *sched)
0ec04e16
IM		 3248{
3249 unsigned long i;
3250
0e9b07e5
ACM		 3251 calibrate_run_measurement_overhead(sched);
3252 calibrate_sleep_measurement_overhead(sched);
0ec04e16 3253
0e9b07e5 3254 test_calibrations(sched);
0ec04e16 3255
ae536acf 3256 if (perf_sched__read_events(sched))
a116e05d 3257 return -1;
0ec04e16 3258
0e9b07e5
ACM		 3259 printf("nr_run_events: %ld\n", sched->nr_run_events);
3260 printf("nr_sleep_events: %ld\n", sched->nr_sleep_events);
3261 printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events);
0ec04e16 3262
0e9b07e5
ACM		 3263 if (sched->targetless_wakeups)
3264 printf("target-less wakeups: %ld\n", sched->targetless_wakeups);
3265 if (sched->multitarget_wakeups)
3266 printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups);
3267 if (sched->nr_run_events_optimized)
0ec04e16 3268 printf("run atoms optimized: %ld\n",
0e9b07e5 3269 sched->nr_run_events_optimized);
0ec04e16 3270
0e9b07e5
ACM		 3271 print_task_traces(sched);
3272 add_cross_task_wakeups(sched);
0ec04e16 3273
0e9b07e5 3274 create_tasks(sched);
0ec04e16 3275 printf("------------------------------------------------------------\n");
0e9b07e5
ACM		 3276 for (i = 0; i < sched->replay_repeat; i++)
3277 run_one_test(sched);
a116e05d
ACM		 3278
3279 return 0;
0ec04e16
IM		 3280}
3281
0e9b07e5
ACM		 3282static void setup_sorting(struct perf_sched *sched, const struct option *options,
3283 const char * const usage_msg[])
daa1d7a5 3284{
0e9b07e5 3285 char *tmp, *tok, *str = strdup(sched->sort_order);
daa1d7a5
FW		 3286
3287 for (tok = strtok_r(str, ", ", &tmp);
3288 tok; tok = strtok_r(NULL, ", ", &tmp)) {
0e9b07e5 3289 if (sort_dimension__add(tok, &sched->sort_list) < 0) {
c7118369
NK		 3290 usage_with_options_msg(usage_msg, options,
3291 "Unknown --sort key: `%s'", tok);
daa1d7a5
FW		 3292 }
3293 }
3294
3295 free(str);
3296
0e9b07e5 3297 sort_dimension__add("pid", &sched->cmp_pid);
daa1d7a5
FW		 3298}
3299
1fc35b29
IM		 3300static int __cmd_record(int argc, const char **argv)
3301{
3302 unsigned int rec_argc, i, j;
3303 const char **rec_argv;
0e9b07e5
ACM		 3304 const char * const record_args[] = {
3305 "record",
3306 "-a",
3307 "-R",
0e9b07e5
ACM		 3308 "-m", "1024",
3309 "-c", "1",
3310 "-e", "sched:sched_switch",
3311 "-e", "sched:sched_stat_wait",
3312 "-e", "sched:sched_stat_sleep",
3313 "-e", "sched:sched_stat_iowait",
3314 "-e", "sched:sched_stat_runtime",
0e9b07e5
ACM		 3315 "-e", "sched:sched_process_fork",
3316 "-e", "sched:sched_wakeup",
7fff9597 3317 "-e", "sched:sched_wakeup_new",
0e9b07e5
ACM		 3318 "-e", "sched:sched_migrate_task",
3319 };
1fc35b29
IM		 3320
3321 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
3322 rec_argv = calloc(rec_argc + 1, sizeof(char *));
3323
e462dc55 3324 if (rec_argv == NULL)
ce47dc56
CS		 3325 return -ENOMEM;
3326
1fc35b29
IM		 3327 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3328 rec_argv[i] = strdup(record_args[i]);
3329
3330 for (j = 1; j < (unsigned int)argc; j++, i++)
3331 rec_argv[i] = argv[j];
3332
3333 BUG_ON(i != rec_argc);
3334
b0ad8ea6 3335 return cmd_record(i, rec_argv);
1fc35b29
IM		 3336}
3337
b0ad8ea6 3338int cmd_sched(int argc, const char **argv)
0a02ad93 3339{
49b8e2be 3340 static const char default_sort_order[] = "avg, max, switch, runtime";
8a39df8f
AH		 3341 struct perf_sched sched = {
3342 .tool = {
3343 .sample = perf_sched__process_tracepoint_sample,
99a3c3a9 3344 .comm = perf_sched__process_comm,
f3b3614a 3345 .namespaces = perf_event__process_namespaces,
8a39df8f
AH		 3346 .lost = perf_event__process_lost,
3347 .fork = perf_sched__process_fork_event,
0a8cb85c 3348 .ordered_events = true,
8a39df8f
AH		 3349 },
3350 .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid),
3351 .sort_list = LIST_HEAD_INIT(sched.sort_list),
3352 .start_work_mutex = PTHREAD_MUTEX_INITIALIZER,
3353 .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER,
8a39df8f
AH		 3354 .sort_order = default_sort_order,
3355 .replay_repeat = 10,
3356 .profile_cpu = -1,
3357 .next_shortname1 = 'A',
3358 .next_shortname2 = '0',
2f80dd44 3359 .skip_merge = 0,
6c973c90
DA		 3360 .show_callchain = 1,
3361 .max_stack = 5,
8a39df8f 3362 };
77f02f44
NK		 3363 const struct option sched_options[] = {
3364 OPT_STRING('i', "input", &input_name, "file",
3365 "input file name"),
3366 OPT_INCR('v', "verbose", &verbose,
3367 "be more verbose (show symbol address, etc)"),
3368 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
3369 "dump raw trace in ASCII"),
6fa94258 3370 OPT_BOOLEAN('f', "force", &sched.force, "don't complain, do it"),
77f02f44
NK		 3371 OPT_END()
3372 };
0e9b07e5
ACM		 3373 const struct option latency_options[] = {
3374 OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]",
3375 "sort by key(s): runtime, switch, avg, max"),
0e9b07e5
ACM		 3376 OPT_INTEGER('C', "CPU", &sched.profile_cpu,
3377 "CPU to profile on"),
2f80dd44
JB		 3378 OPT_BOOLEAN('p', "pids", &sched.skip_merge,
3379 "latency stats per pid instead of per comm"),
77f02f44 3380 OPT_PARENT(sched_options)
0e9b07e5
ACM		 3381 };
3382 const struct option replay_options[] = {
3383 OPT_UINTEGER('r', "repeat", &sched.replay_repeat,
3384 "repeat the workload replay N times (-1: infinite)"),
77f02f44 3385 OPT_PARENT(sched_options)
0e9b07e5 3386 };
99623c62
JO		 3387 const struct option map_options[] = {
3388 OPT_BOOLEAN(0, "compact", &sched.map.comp,
3389 "map output in compact mode"),
a151a37a
JO		 3390 OPT_STRING(0, "color-pids", &sched.map.color_pids_str, "pids",
3391 "highlight given pids in map"),
cf294f24
JO		 3392 OPT_STRING(0, "color-cpus", &sched.map.color_cpus_str, "cpus",
3393 "highlight given CPUs in map"),
73643bb6
JO		 3394 OPT_STRING(0, "cpus", &sched.map.cpus_str, "cpus",
3395 "display given CPUs in map"),
77f02f44 3396 OPT_PARENT(sched_options)
99623c62 3397 };
49394a2a
DA		 3398 const struct option timehist_options[] = {
3399 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
3400 "file", "vmlinux pathname"),
3401 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
3402 "file", "kallsyms pathname"),
6c973c90
DA		 3403 OPT_BOOLEAN('g', "call-graph", &sched.show_callchain,
3404 "Display call chains if present (default on)"),
3405 OPT_UINTEGER(0, "max-stack", &sched.max_stack,
3406 "Maximum number of functions to display backtrace."),
49394a2a
DA		 3407 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
3408 "Look for files with symbols relative to this directory"),
52df138c
DA		 3409 OPT_BOOLEAN('s', "summary", &sched.summary_only,
3410 "Show only syscall summary with statistics"),
3411 OPT_BOOLEAN('S', "with-summary", &sched.summary,
3412 "Show all syscalls and summary with statistics"),
fc1469f1 3413 OPT_BOOLEAN('w', "wakeups", &sched.show_wakeups, "Show wakeup events"),
292c4a8f 3414 OPT_BOOLEAN('n', "next", &sched.show_next, "Show next task"),
350f54fa 3415 OPT_BOOLEAN('M', "migrations", &sched.show_migrations, "Show migration events"),
a407b067 3416 OPT_BOOLEAN('V', "cpu-visual", &sched.show_cpu_visual, "Add CPU visual"),
07235f84 3417 OPT_BOOLEAN('I', "idle-hist", &sched.idle_hist, "Show idle events only"),
853b7407
DA		 3418 OPT_STRING(0, "time", &sched.time_str, "str",
3419 "Time span for analysis (start,stop)"),
414e050c 3420 OPT_BOOLEAN(0, "state", &sched.show_state, "Show task state when sched-out"),
0f59d7a3
DA		 3421 OPT_STRING('p', "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
3422 "analyze events only for given process id(s)"),
3423 OPT_STRING('t', "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
3424 "analyze events only for given thread id(s)"),
49394a2a
DA		 3425 OPT_PARENT(sched_options)
3426 };
3427
0e9b07e5
ACM		 3428 const char * const latency_usage[] = {
3429 "perf sched latency [<options>]",
3430 NULL
3431 };
3432 const char * const replay_usage[] = {
3433 "perf sched replay [<options>]",
3434 NULL
3435 };
99623c62
JO		 3436 const char * const map_usage[] = {
3437 "perf sched map [<options>]",
3438 NULL
3439 };
49394a2a
DA		 3440 const char * const timehist_usage[] = {
3441 "perf sched timehist [<options>]",
3442 NULL
3443 };
a83edb2d 3444 const char *const sched_subcommands[] = { "record", "latency", "map",
49394a2a
DA		 3445 "replay", "script",
3446 "timehist", NULL };
a83edb2d
RR		 3447 const char *sched_usage[] = {
3448 NULL,
0e9b07e5
ACM		 3449 NULL
3450 };
3451 struct trace_sched_handler lat_ops = {
3452 .wakeup_event = latency_wakeup_event,
3453 .switch_event = latency_switch_event,
3454 .runtime_event = latency_runtime_event,
0e9b07e5
ACM		 3455 .migrate_task_event = latency_migrate_task_event,
3456 };
3457 struct trace_sched_handler map_ops = {
3458 .switch_event = map_switch_event,
3459 };
3460 struct trace_sched_handler replay_ops = {
3461 .wakeup_event = replay_wakeup_event,
3462 .switch_event = replay_switch_event,
3463 .fork_event = replay_fork_event,
3464 };
156a2b02
AH		 3465 unsigned int i;
3466
3467 for (i = 0; i < ARRAY_SIZE(sched.curr_pid); i++)
3468 sched.curr_pid[i] = -1;
0e9b07e5 3469
a83edb2d
RR		 3470 argc = parse_options_subcommand(argc, argv, sched_options, sched_subcommands,
3471 sched_usage, PARSE_OPT_STOP_AT_NON_OPTION);
f2858d8a
IM		 3472 if (!argc)
3473 usage_with_options(sched_usage, sched_options);
0a02ad93 3474
c0777c5a 3475 /*
133dc4c3 3476 * Aliased to 'perf script' for now:
c0777c5a 3477 */
133dc4c3 3478 if (!strcmp(argv[0], "script"))
b0ad8ea6 3479 return cmd_script(argc, argv);
c0777c5a 3480
1fc35b29
IM		 3481 if (!strncmp(argv[0], "rec", 3)) {
3482 return __cmd_record(argc, argv);
3483 } else if (!strncmp(argv[0], "lat", 3)) {
0e9b07e5 3484 sched.tp_handler = &lat_ops;
f2858d8a
IM		 3485 if (argc > 1) {
3486 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
3487 if (argc)
3488 usage_with_options(latency_usage, latency_options);
f2858d8a 3489 }
0e9b07e5
ACM		 3490 setup_sorting(&sched, latency_options, latency_usage);
3491 return perf_sched__lat(&sched);
0ec04e16 3492 } else if (!strcmp(argv[0], "map")) {
99623c62 3493 if (argc) {
a151a37a 3494 argc = parse_options(argc, argv, map_options, map_usage, 0);
99623c62
JO		 3495 if (argc)
3496 usage_with_options(map_usage, map_options);
3497 }
0e9b07e5
ACM		 3498 sched.tp_handler = &map_ops;
3499 setup_sorting(&sched, latency_options, latency_usage);
3500 return perf_sched__map(&sched);
f2858d8a 3501 } else if (!strncmp(argv[0], "rep", 3)) {
0e9b07e5 3502 sched.tp_handler = &replay_ops;
f2858d8a
IM		 3503 if (argc) {
3504 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
3505 if (argc)
3506 usage_with_options(replay_usage, replay_options);
3507 }
0e9b07e5 3508 return perf_sched__replay(&sched);
49394a2a
DA		 3509 } else if (!strcmp(argv[0], "timehist")) {
3510 if (argc) {
3511 argc = parse_options(argc, argv, timehist_options,
3512 timehist_usage, 0);
3513 if (argc)
3514 usage_with_options(timehist_usage, timehist_options);
3515 }
292c4a8f
BG		 3516 if ((sched.show_wakeups || sched.show_next) &&
3517 sched.summary_only) {
3518 pr_err(" Error: -s and -[n|w] are mutually exclusive.\n");
fc1469f1 3519 parse_options_usage(timehist_usage, timehist_options, "s", true);
292c4a8f
BG		 3520 if (sched.show_wakeups)
3521 parse_options_usage(NULL, timehist_options, "w", true);
3522 if (sched.show_next)
3523 parse_options_usage(NULL, timehist_options, "n", true);
fc1469f1
DA		 3524 return -EINVAL;
3525 }
3526
49394a2a 3527 return perf_sched__timehist(&sched);
f2858d8a
IM		 3528 } else {
3529 usage_with_options(sched_usage, sched_options);
3530 }
3531
ec156764 3532 return 0;
0a02ad93 3533}
A mirror of Linus' kernel repository