]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blame - tools/perf/builtin-sched.c
projects / mirror_ubuntu-jammy-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'for-5.4/hidraw-hiddev-epoll' into for-linus
[mirror_ubuntu-jammy-kernel.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 4
ee29be62 5#include "util/evlist.h"
0a02ad93 6#include "util/cache.h"
e3f42609 7#include "util/evsel.h"
0a02ad93
IM		 8#include "util/symbol.h"
9#include "util/thread.h"
10#include "util/header.h"
94c744b6 11#include "util/session.h"
45694aa7 12#include "util/tool.h"
57480d2c 13#include "util/cloexec.h"
a151a37a 14#include "util/thread_map.h"
8cd91195 15#include "util/color.h"
49394a2a 16#include "util/stat.h"
6a9fa4e3 17#include "util/string2.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>
7f7c536f 28#include <linux/zalloc.h>
b1ffe8f3 29#include <sys/prctl.h>
7b78f136 30#include <sys/resource.h>
fd20e811 31#include <inttypes.h>
0a02ad93 32
a43783ae 33#include <errno.h>
b1ffe8f3
IM		 34#include <semaphore.h>
35#include <pthread.h>
36#include <math.h>
cb06ac25 37#include <api/fs/fs.h>
4fc76e49 38#include <linux/time64.h>
419ab0d6 39
3052ba56 40#include <linux/ctype.h>
3d689ed6 41
b1ffe8f3
IM		 42#define PR_SET_NAME 15 /* Set process name */
43#define MAX_CPUS 4096
b1ffe8f3
IM		 44#define COMM_LEN 20
45#define SYM_LEN 129
a35e27d0 46#define MAX_PID 1024000
ec156764 47
39aeb52f 48struct sched_atom;
ec156764 49
b1ffe8f3
IM		 50struct task_desc {
51 unsigned long nr;
52 unsigned long pid;
53 char comm[COMM_LEN];
ec156764 54
b1ffe8f3
IM		 55 unsigned long nr_events;
56 unsigned long curr_event;
39aeb52f 57 struct sched_atom **atoms;
b1ffe8f3
IM		 58
59 pthread_t thread;
60 sem_t sleep_sem;
ec156764 61
b1ffe8f3
IM		 62 sem_t ready_for_work;
63 sem_t work_done_sem;
64
65 u64 cpu_usage;
66};
67
68enum sched_event_type {
69 SCHED_EVENT_RUN,
70 SCHED_EVENT_SLEEP,
71 SCHED_EVENT_WAKEUP,
55ffb7a6 72 SCHED_EVENT_MIGRATION,
b1ffe8f3
IM		 73};
74
39aeb52f 75struct sched_atom {
b1ffe8f3 76 enum sched_event_type type;
eed05fe7 77 int specific_wait;
b1ffe8f3
IM		 78 u64 timestamp;
79 u64 duration;
80 unsigned long nr;
b1ffe8f3
IM		 81 sem_t *wait_sem;
82 struct task_desc *wakee;
83};
84
e936e8e4 85#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP"
b1ffe8f3 86
941bdea7
NK		 87/* task state bitmask, copied from include/linux/sched.h */
88#define TASK_RUNNING 0
89#define TASK_INTERRUPTIBLE 1
90#define TASK_UNINTERRUPTIBLE 2
91#define __TASK_STOPPED 4
92#define __TASK_TRACED 8
93/* in tsk->exit_state */
94#define EXIT_DEAD 16
95#define EXIT_ZOMBIE 32
96#define EXIT_TRACE (EXIT_ZOMBIE | EXIT_DEAD)
97/* in tsk->state again */
98#define TASK_DEAD 64
99#define TASK_WAKEKILL 128
100#define TASK_WAKING 256
101#define TASK_PARKED 512
102
b1ffe8f3
IM		 103enum thread_state {
104 THREAD_SLEEPING = 0,
105 THREAD_WAIT_CPU,
106 THREAD_SCHED_IN,
107 THREAD_IGNORE
108};
109
110struct work_atom {
111 struct list_head list;
112 enum thread_state state;
aa1ab9d2 113 u64 sched_out_time;
b1ffe8f3
IM		 114 u64 wake_up_time;
115 u64 sched_in_time;
116 u64 runtime;
117};
118
39aeb52f 119struct work_atoms {
120 struct list_head work_list;
b1ffe8f3
IM		 121 struct thread *thread;
122 struct rb_node node;
123 u64 max_lat;
3786310a 124 u64 max_lat_at;
b1ffe8f3
IM		 125 u64 total_lat;
126 u64 nb_atoms;
127 u64 total_runtime;
2f80dd44 128 int num_merged;
b1ffe8f3
IM		 129};
130
39aeb52f 131typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
b1ffe8f3 132
9ec3f4e4 133struct perf_sched;
0e9b07e5 134
9ec3f4e4
ACM		 135struct trace_sched_handler {
136 int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
137 struct perf_sample *sample, struct machine *machine);
0e9b07e5 138
9ec3f4e4
ACM		 139 int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
140 struct perf_sample *sample, struct machine *machine);
0e9b07e5 141
9ec3f4e4
ACM		 142 int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
143 struct perf_sample *sample, struct machine *machine);
0e9b07e5 144
cb627505
DA		 145 /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */
146 int (*fork_event)(struct perf_sched *sched, union perf_event *event,
147 struct machine *machine);
0e9b07e5
ACM		 148
149 int (*migrate_task_event)(struct perf_sched *sched,
9ec3f4e4
ACM		 150 struct perf_evsel *evsel,
151 struct perf_sample *sample,
152 struct machine *machine);
0e9b07e5
ACM		 153};
154
a151a37a 155#define COLOR_PIDS PERF_COLOR_BLUE
cf294f24 156#define COLOR_CPUS PERF_COLOR_BG_RED
a151a37a 157
99623c62
JO		 158struct perf_sched_map {
159 DECLARE_BITMAP(comp_cpus_mask, MAX_CPUS);
160 int *comp_cpus;
161 bool comp;
a151a37a
JO		 162 struct thread_map *color_pids;
163 const char *color_pids_str;
cf294f24
JO		 164 struct cpu_map *color_cpus;
165 const char *color_cpus_str;
73643bb6
JO		 166 struct cpu_map *cpus;
167 const char *cpus_str;
99623c62
JO		 168};
169
0e9b07e5
ACM		 170struct perf_sched {
171 struct perf_tool tool;
0e9b07e5
ACM		 172 const char *sort_order;
173 unsigned long nr_tasks;
cb06ac25 174 struct task_desc **pid_to_task;
0e9b07e5
ACM		 175 struct task_desc **tasks;
176 const struct trace_sched_handler *tp_handler;
177 pthread_mutex_t start_work_mutex;
178 pthread_mutex_t work_done_wait_mutex;
179 int profile_cpu;
180/*
181 * Track the current task - that way we can know whether there's any
182 * weird events, such as a task being switched away that is not current.
183 */
184 int max_cpu;
185 u32 curr_pid[MAX_CPUS];
186 struct thread *curr_thread[MAX_CPUS];
187 char next_shortname1;
188 char next_shortname2;
189 unsigned int replay_repeat;
190 unsigned long nr_run_events;
191 unsigned long nr_sleep_events;
192 unsigned long nr_wakeup_events;
193 unsigned long nr_sleep_corrections;
194 unsigned long nr_run_events_optimized;
195 unsigned long targetless_wakeups;
196 unsigned long multitarget_wakeups;
197 unsigned long nr_runs;
198 unsigned long nr_timestamps;
199 unsigned long nr_unordered_timestamps;
0e9b07e5
ACM		 200 unsigned long nr_context_switch_bugs;
201 unsigned long nr_events;
202 unsigned long nr_lost_chunks;
203 unsigned long nr_lost_events;
204 u64 run_measurement_overhead;
205 u64 sleep_measurement_overhead;
206 u64 start_time;
207 u64 cpu_usage;
208 u64 runavg_cpu_usage;
209 u64 parent_cpu_usage;
210 u64 runavg_parent_cpu_usage;
211 u64 sum_runtime;
212 u64 sum_fluct;
213 u64 run_avg;
214 u64 all_runtime;
215 u64 all_count;
216 u64 cpu_last_switched[MAX_CPUS];
cb4c13a5 217 struct rb_root_cached atom_root, sorted_atom_root, merged_atom_root;
0e9b07e5 218 struct list_head sort_list, cmp_pid;
939cda52 219 bool force;
2f80dd44 220 bool skip_merge;
99623c62 221 struct perf_sched_map map;
52df138c
DA		 222
223 /* options for timehist command */
224 bool summary;
225 bool summary_only;
699b5b92 226 bool idle_hist;
6c973c90
DA		 227 bool show_callchain;
228 unsigned int max_stack;
a407b067 229 bool show_cpu_visual;
fc1469f1 230 bool show_wakeups;
292c4a8f 231 bool show_next;
350f54fa 232 bool show_migrations;
414e050c 233 bool show_state;
52df138c 234 u64 skipped_samples;
853b7407
DA		 235 const char *time_str;
236 struct perf_time_interval ptime;
9396c9cb 237 struct perf_time_interval hist_time;
0e9b07e5 238};
b1ffe8f3 239
49394a2a
DA		 240/* per thread run time data */
241struct thread_runtime {
242 u64 last_time; /* time of previous sched in/out event */
243 u64 dt_run; /* run time */
941bdea7
NK		 244 u64 dt_sleep; /* time between CPU access by sleep (off cpu) */
245 u64 dt_iowait; /* time between CPU access by iowait (off cpu) */
246 u64 dt_preempt; /* time between CPU access by preempt (off cpu) */
49394a2a
DA		 247 u64 dt_delay; /* time between wakeup and sched-in */
248 u64 ready_to_run; /* time of wakeup */
249
250 struct stats run_stats;
251 u64 total_run_time;
587782c5
NK		 252 u64 total_sleep_time;
253 u64 total_iowait_time;
254 u64 total_preempt_time;
255 u64 total_delay_time;
350f54fa 256
941bdea7 257 int last_state;
8640da9f
CD		 258
259 char shortname[3];
99a3c3a9
CD		 260 bool comm_changed;
261
350f54fa 262 u64 migrations;
49394a2a
DA		 263};
264
265/* per event run time data */
266struct evsel_runtime {
267 u64 *last_time; /* time this event was last seen per cpu */
268 u32 ncpu; /* highest cpu slot allocated */
269};
270
3bc2fa9c
NK		 271/* per cpu idle time data */
272struct idle_thread_runtime {
273 struct thread_runtime tr;
274 struct thread *last_thread;
cb4c13a5 275 struct rb_root_cached sorted_root;
3bc2fa9c
NK		 276 struct callchain_root callchain;
277 struct callchain_cursor cursor;
278};
279
49394a2a
DA		 280/* track idle times per cpu */
281static struct thread **idle_threads;
282static int idle_max_cpu;
283static char idle_comm[] = "<idle>";
284
b1ffe8f3 285static u64 get_nsecs(void)
ec156764
IM		 286{
287 struct timespec ts;
288
289 clock_gettime(CLOCK_MONOTONIC, &ts);
290
4fc76e49 291 return ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec;
ec156764
IM		 292}
293
0e9b07e5 294static void burn_nsecs(struct perf_sched *sched, u64 nsecs)
ec156764 295{
b1ffe8f3 296 u64 T0 = get_nsecs(), T1;
ec156764
IM		 297
298 do {
299 T1 = get_nsecs();
0e9b07e5 300 } while (T1 + sched->run_measurement_overhead < T0 + nsecs);
ec156764
IM		 301}
302
b1ffe8f3 303static void sleep_nsecs(u64 nsecs)
ec156764
IM		 304{
305 struct timespec ts;
306
307 ts.tv_nsec = nsecs % 999999999;
308 ts.tv_sec = nsecs / 999999999;
309
310 nanosleep(&ts, NULL);
311}
312
0e9b07e5 313static void calibrate_run_measurement_overhead(struct perf_sched *sched)
ec156764 314{
4fc76e49 315 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
ec156764
IM		 316 int i;
317
318 for (i = 0; i < 10; i++) {
319 T0 = get_nsecs();
0e9b07e5 320 burn_nsecs(sched, 0);
ec156764
IM		 321 T1 = get_nsecs();
322 delta = T1-T0;
323 min_delta = min(min_delta, delta);
324 }
0e9b07e5 325 sched->run_measurement_overhead = min_delta;
ec156764 326
9486aa38 327 printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
ec156764
IM		 328}
329
0e9b07e5 330static void calibrate_sleep_measurement_overhead(struct perf_sched *sched)
ec156764 331{
4fc76e49 332 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
ec156764
IM		 333 int i;
334
335 for (i = 0; i < 10; i++) {
336 T0 = get_nsecs();
337 sleep_nsecs(10000);
338 T1 = get_nsecs();
339 delta = T1-T0;
340 min_delta = min(min_delta, delta);
341 }
342 min_delta -= 10000;
0e9b07e5 343 sched->sleep_measurement_overhead = min_delta;
ec156764 344
9486aa38 345 printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
ec156764
IM		 346}
347
39aeb52f 348static struct sched_atom *
b1ffe8f3 349get_new_event(struct task_desc *task, u64 timestamp)
ec156764 350{
36479484 351 struct sched_atom *event = zalloc(sizeof(*event));
ec156764
IM		 352 unsigned long idx = task->nr_events;
353 size_t size;
354
355 event->timestamp = timestamp;
356 event->nr = idx;
357
358 task->nr_events++;
39aeb52f 359 size = sizeof(struct sched_atom *) * task->nr_events;
360 task->atoms = realloc(task->atoms, size);
361 BUG_ON(!task->atoms);
ec156764 362
39aeb52f 363 task->atoms[idx] = event;
ec156764
IM		 364
365 return event;
366}
367
39aeb52f 368static struct sched_atom *last_event(struct task_desc *task)
ec156764
IM		 369{
370 if (!task->nr_events)
371 return NULL;
372
39aeb52f 373 return task->atoms[task->nr_events - 1];
ec156764
IM		 374}
375
0e9b07e5
ACM		 376static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task,
377 u64 timestamp, u64 duration)
ec156764 378{
39aeb52f 379 struct sched_atom *event, *curr_event = last_event(task);
ec156764
IM		 380
381 /*
fbf94829
IM		 382 * optimize an existing RUN event by merging this one
383 * to it:
384 */
ec156764 385 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
0e9b07e5 386 sched->nr_run_events_optimized++;
ec156764
IM		 387 curr_event->duration += duration;
388 return;
389 }
390
391 event = get_new_event(task, timestamp);
392
393 event->type = SCHED_EVENT_RUN;
394 event->duration = duration;
395
0e9b07e5 396 sched->nr_run_events++;
ec156764
IM		 397}
398
0e9b07e5
ACM		 399static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task,
400 u64 timestamp, struct task_desc *wakee)
ec156764 401{
39aeb52f 402 struct sched_atom *event, *wakee_event;
ec156764
IM		 403
404 event = get_new_event(task, timestamp);
405 event->type = SCHED_EVENT_WAKEUP;
406 event->wakee = wakee;
407
408 wakee_event = last_event(wakee);
409 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
0e9b07e5 410 sched->targetless_wakeups++;
ec156764
IM		 411 return;
412 }
413 if (wakee_event->wait_sem) {
0e9b07e5 414 sched->multitarget_wakeups++;
ec156764
IM		 415 return;
416 }
417
36479484 418 wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
ec156764
IM		 419 sem_init(wakee_event->wait_sem, 0, 0);
420 wakee_event->specific_wait = 1;
421 event->wait_sem = wakee_event->wait_sem;
422
0e9b07e5 423 sched->nr_wakeup_events++;
ec156764
IM		 424}
425
0e9b07e5
ACM		 426static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task,
427 u64 timestamp, u64 task_state __maybe_unused)
ec156764 428{
39aeb52f 429 struct sched_atom *event = get_new_event(task, timestamp);
ec156764
IM		 430
431 event->type = SCHED_EVENT_SLEEP;
432
0e9b07e5 433 sched->nr_sleep_events++;
ec156764
IM		 434}
435
0e9b07e5
ACM		 436static struct task_desc *register_pid(struct perf_sched *sched,
437 unsigned long pid, const char *comm)
ec156764
IM		 438{
439 struct task_desc *task;
cb06ac25 440 static int pid_max;
ec156764 441
cb06ac25
YS		 442 if (sched->pid_to_task == NULL) {
443 if (sysctl__read_int("kernel/pid_max", &pid_max) < 0)
444 pid_max = MAX_PID;
445 BUG_ON((sched->pid_to_task = calloc(pid_max, sizeof(struct task_desc *))) == NULL);
446 }
3a423a5c
YS		 447 if (pid >= (unsigned long)pid_max) {
448 BUG_ON((sched->pid_to_task = realloc(sched->pid_to_task, (pid + 1) *
449 sizeof(struct task_desc *))) == NULL);
450 while (pid >= (unsigned long)pid_max)
451 sched->pid_to_task[pid_max++] = NULL;
452 }
ec156764 453
0e9b07e5 454 task = sched->pid_to_task[pid];
ec156764
IM		 455
456 if (task)
457 return task;
458
36479484 459 task = zalloc(sizeof(*task));
ec156764 460 task->pid = pid;
0e9b07e5 461 task->nr = sched->nr_tasks;
ec156764
IM		 462 strcpy(task->comm, comm);
463 /*
464 * every task starts in sleeping state - this gets ignored
465 * if there's no wakeup pointing to this sleep state:
466 */
0e9b07e5 467 add_sched_event_sleep(sched, task, 0, 0);
ec156764 468
0e9b07e5
ACM		 469 sched->pid_to_task[pid] = task;
470 sched->nr_tasks++;
0755bc4d 471 sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_desc *));
0e9b07e5
ACM		 472 BUG_ON(!sched->tasks);
473 sched->tasks[task->nr] = task;
ec156764 474
bb963e16 475 if (verbose > 0)
0e9b07e5 476 printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
ec156764
IM		 477
478 return task;
479}
480
481
0e9b07e5 482static void print_task_traces(struct perf_sched *sched)
ec156764
IM		 483{
484 struct task_desc *task;
485 unsigned long i;
486
0e9b07e5
ACM		 487 for (i = 0; i < sched->nr_tasks; i++) {
488 task = sched->tasks[i];
ad236fd2 489 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
ec156764
IM		 490 task->nr, task->comm, task->pid, task->nr_events);
491 }
492}
493
0e9b07e5 494static void add_cross_task_wakeups(struct perf_sched *sched)
ec156764
IM		 495{
496 struct task_desc *task1, *task2;
497 unsigned long i, j;
498
0e9b07e5
ACM		 499 for (i = 0; i < sched->nr_tasks; i++) {
500 task1 = sched->tasks[i];
ec156764 501 j = i + 1;
0e9b07e5 502 if (j == sched->nr_tasks)
ec156764 503 j = 0;
0e9b07e5
ACM		 504 task2 = sched->tasks[j];
505 add_sched_event_wakeup(sched, task1, 0, task2);
ec156764
IM		 506 }
507}
508
0e9b07e5
ACM		 509static void perf_sched__process_event(struct perf_sched *sched,
510 struct sched_atom *atom)
ec156764
IM		 511{
512 int ret = 0;
ec156764 513
39aeb52f 514 switch (atom->type) {
ec156764 515 case SCHED_EVENT_RUN:
0e9b07e5 516 burn_nsecs(sched, atom->duration);
ec156764
IM		 517 break;
518 case SCHED_EVENT_SLEEP:
39aeb52f 519 if (atom->wait_sem)
520 ret = sem_wait(atom->wait_sem);
ec156764
IM		 521 BUG_ON(ret);
522 break;
523 case SCHED_EVENT_WAKEUP:
39aeb52f 524 if (atom->wait_sem)
525 ret = sem_post(atom->wait_sem);
ec156764
IM		 526 BUG_ON(ret);
527 break;
55ffb7a6
MG		 528 case SCHED_EVENT_MIGRATION:
529 break;
ec156764
IM		 530 default:
531 BUG_ON(1);
532 }
533}
534
b1ffe8f3 535static u64 get_cpu_usage_nsec_parent(void)
ec156764
IM		 536{
537 struct rusage ru;
b1ffe8f3 538 u64 sum;
ec156764
IM		 539 int err;
540
541 err = getrusage(RUSAGE_SELF, &ru);
542 BUG_ON(err);
543
4fc76e49
ACM		 544 sum = ru.ru_utime.tv_sec * NSEC_PER_SEC + ru.ru_utime.tv_usec * NSEC_PER_USEC;
545 sum += ru.ru_stime.tv_sec * NSEC_PER_SEC + ru.ru_stime.tv_usec * NSEC_PER_USEC;
ec156764
IM		 546
547 return sum;
548}
549
939cda52 550static int self_open_counters(struct perf_sched *sched, unsigned long cur_task)
ec156764 551{
c0c9e721 552 struct perf_event_attr attr;
939cda52 553 char sbuf[STRERR_BUFSIZE], info[STRERR_BUFSIZE];
c0c9e721 554 int fd;
939cda52
YS		 555 struct rlimit limit;
556 bool need_privilege = false;
ec156764 557
c0c9e721 558 memset(&attr, 0, sizeof(attr));
ec156764 559
c0c9e721
XG		 560 attr.type = PERF_TYPE_SOFTWARE;
561 attr.config = PERF_COUNT_SW_TASK_CLOCK;
ec156764 562
939cda52 563force_again:
57480d2c
YD		 564 fd = sys_perf_event_open(&attr, 0, -1, -1,
565 perf_event_open_cloexec_flag());
c0c9e721 566
1aff59be 567 if (fd < 0) {
939cda52
YS		 568 if (errno == EMFILE) {
569 if (sched->force) {
570 BUG_ON(getrlimit(RLIMIT_NOFILE, &limit) == -1);
571 limit.rlim_cur += sched->nr_tasks - cur_task;
572 if (limit.rlim_cur > limit.rlim_max) {
573 limit.rlim_max = limit.rlim_cur;
574 need_privilege = true;
575 }
576 if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
577 if (need_privilege && errno == EPERM)
578 strcpy(info, "Need privilege\n");
579 } else
580 goto force_again;
581 } else
582 strcpy(info, "Have a try with -f option\n");
583 }
60b7d14a 584 pr_err("Error: sys_perf_event_open() syscall returned "
939cda52 585 "with %d (%s)\n%s", fd,
c8b5f2c9 586 str_error_r(errno, sbuf, sizeof(sbuf)), info);
1aff59be
YS		 587 exit(EXIT_FAILURE);
588 }
c0c9e721
XG		 589 return fd;
590}
591
592static u64 get_cpu_usage_nsec_self(int fd)
593{
594 u64 runtime;
595 int ret;
596
597 ret = read(fd, &runtime, sizeof(runtime));
598 BUG_ON(ret != sizeof(runtime));
599
600 return runtime;
ec156764
IM		 601}
602
0e9b07e5
ACM		 603struct sched_thread_parms {
604 struct task_desc *task;
605 struct perf_sched *sched;
08097abc 606 int fd;
0e9b07e5
ACM		 607};
608
ec156764
IM		 609static void *thread_func(void *ctx)
610{
0e9b07e5
ACM		 611 struct sched_thread_parms *parms = ctx;
612 struct task_desc *this_task = parms->task;
613 struct perf_sched *sched = parms->sched;
b1ffe8f3 614 u64 cpu_usage_0, cpu_usage_1;
ec156764
IM		 615 unsigned long i, ret;
616 char comm2[22];
08097abc 617 int fd = parms->fd;
ec156764 618
74cf249d 619 zfree(&parms);
0e9b07e5 620
ec156764
IM		 621 sprintf(comm2, ":%s", this_task->comm);
622 prctl(PR_SET_NAME, comm2);
a116e05d
ACM		 623 if (fd < 0)
624 return NULL;
ec156764
IM		 625again:
626 ret = sem_post(&this_task->ready_for_work);
627 BUG_ON(ret);
0e9b07e5 628 ret = pthread_mutex_lock(&sched->start_work_mutex);
ec156764 629 BUG_ON(ret);
0e9b07e5 630 ret = pthread_mutex_unlock(&sched->start_work_mutex);
ec156764 631 BUG_ON(ret);
ec156764 632
c0c9e721 633 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
ec156764
IM		 634
635 for (i = 0; i < this_task->nr_events; i++) {
636 this_task->curr_event = i;
0e9b07e5 637 perf_sched__process_event(sched, this_task->atoms[i]);
ec156764
IM		 638 }
639
c0c9e721 640 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
ec156764 641 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
ec156764
IM		 642 ret = sem_post(&this_task->work_done_sem);
643 BUG_ON(ret);
ec156764 644
0e9b07e5 645 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
ec156764 646 BUG_ON(ret);
0e9b07e5 647 ret = pthread_mutex_unlock(&sched->work_done_wait_mutex);
ec156764 648 BUG_ON(ret);
ec156764
IM		 649
650 goto again;
651}
652
0e9b07e5 653static void create_tasks(struct perf_sched *sched)
ec156764
IM		 654{
655 struct task_desc *task;
656 pthread_attr_t attr;
657 unsigned long i;
658 int err;
659
660 err = pthread_attr_init(&attr);
661 BUG_ON(err);
12f7e036
JP		 662 err = pthread_attr_setstacksize(&attr,
663 (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
ec156764 664 BUG_ON(err);
0e9b07e5 665 err = pthread_mutex_lock(&sched->start_work_mutex);
ec156764 666 BUG_ON(err);
0e9b07e5 667 err = pthread_mutex_lock(&sched->work_done_wait_mutex);
ec156764 668 BUG_ON(err);
0e9b07e5
ACM		 669 for (i = 0; i < sched->nr_tasks; i++) {
670 struct sched_thread_parms *parms = malloc(sizeof(*parms));
671 BUG_ON(parms == NULL);
672 parms->task = task = sched->tasks[i];
673 parms->sched = sched;
939cda52 674 parms->fd = self_open_counters(sched, i);
ec156764
IM		 675 sem_init(&task->sleep_sem, 0, 0);
676 sem_init(&task->ready_for_work, 0, 0);
677 sem_init(&task->work_done_sem, 0, 0);
678 task->curr_event = 0;
0e9b07e5 679 err = pthread_create(&task->thread, &attr, thread_func, parms);
ec156764
IM		 680 BUG_ON(err);
681 }
682}
683
0e9b07e5 684static void wait_for_tasks(struct perf_sched *sched)
ec156764 685{
b1ffe8f3 686 u64 cpu_usage_0, cpu_usage_1;
ec156764
IM		 687 struct task_desc *task;
688 unsigned long i, ret;
689
0e9b07e5
ACM		 690 sched->start_time = get_nsecs();
691 sched->cpu_usage = 0;
692 pthread_mutex_unlock(&sched->work_done_wait_mutex);
ec156764 693
0e9b07e5
ACM		 694 for (i = 0; i < sched->nr_tasks; i++) {
695 task = sched->tasks[i];
ec156764
IM		 696 ret = sem_wait(&task->ready_for_work);
697 BUG_ON(ret);
698 sem_init(&task->ready_for_work, 0, 0);
699 }
0e9b07e5 700 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
ec156764
IM		 701 BUG_ON(ret);
702
703 cpu_usage_0 = get_cpu_usage_nsec_parent();
704
0e9b07e5 705 pthread_mutex_unlock(&sched->start_work_mutex);
ec156764 706
0e9b07e5
ACM		 707 for (i = 0; i < sched->nr_tasks; i++) {
708 task = sched->tasks[i];
ec156764
IM		 709 ret = sem_wait(&task->work_done_sem);
710 BUG_ON(ret);
711 sem_init(&task->work_done_sem, 0, 0);
0e9b07e5 712 sched->cpu_usage += task->cpu_usage;
ec156764
IM		 713 task->cpu_usage = 0;
714 }
715
716 cpu_usage_1 = get_cpu_usage_nsec_parent();
0e9b07e5
ACM		 717 if (!sched->runavg_cpu_usage)
718 sched->runavg_cpu_usage = sched->cpu_usage;
ff5f3bbd 719 sched->runavg_cpu_usage = (sched->runavg_cpu_usage * (sched->replay_repeat - 1) + sched->cpu_usage) / sched->replay_repeat;
ec156764 720
0e9b07e5
ACM		 721 sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
722 if (!sched->runavg_parent_cpu_usage)
723 sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
ff5f3bbd
YS		 724 sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * (sched->replay_repeat - 1) +
725 sched->parent_cpu_usage)/sched->replay_repeat;
ec156764 726
0e9b07e5 727 ret = pthread_mutex_lock(&sched->start_work_mutex);
ec156764
IM		 728 BUG_ON(ret);
729
0e9b07e5
ACM		 730 for (i = 0; i < sched->nr_tasks; i++) {
731 task = sched->tasks[i];
ec156764
IM		 732 sem_init(&task->sleep_sem, 0, 0);
733 task->curr_event = 0;
734 }
735}
736
0e9b07e5 737static void run_one_test(struct perf_sched *sched)
ec156764 738{
fb7d0b3c 739 u64 T0, T1, delta, avg_delta, fluct;
ec156764
IM		 740
741 T0 = get_nsecs();
0e9b07e5 742 wait_for_tasks(sched);
ec156764
IM		 743 T1 = get_nsecs();
744
745 delta = T1 - T0;
0e9b07e5
ACM		 746 sched->sum_runtime += delta;
747 sched->nr_runs++;
ec156764 748
0e9b07e5 749 avg_delta = sched->sum_runtime / sched->nr_runs;
ec156764
IM		 750 if (delta < avg_delta)
751 fluct = avg_delta - delta;
752 else
753 fluct = delta - avg_delta;
0e9b07e5
ACM		 754 sched->sum_fluct += fluct;
755 if (!sched->run_avg)
756 sched->run_avg = delta;
ff5f3bbd 757 sched->run_avg = (sched->run_avg * (sched->replay_repeat - 1) + delta) / sched->replay_repeat;
ec156764 758
4fc76e49 759 printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / NSEC_PER_MSEC);
ec156764 760
4fc76e49 761 printf("ravg: %0.2f, ", (double)sched->run_avg / NSEC_PER_MSEC);
ec156764 762
ad236fd2 763 printf("cpu: %0.2f / %0.2f",
4fc76e49 764 (double)sched->cpu_usage / NSEC_PER_MSEC, (double)sched->runavg_cpu_usage / NSEC_PER_MSEC);
ec156764
IM		 765
766#if 0
767 /*
fbf94829 768 * rusage statistics done by the parent, these are less
0e9b07e5 769 * accurate than the sched->sum_exec_runtime based statistics:
fbf94829 770 */
ad236fd2 771 printf(" [%0.2f / %0.2f]",
4fc76e49
ACM		 772 (double)sched->parent_cpu_usage / NSEC_PER_MSEC,
773 (double)sched->runavg_parent_cpu_usage / NSEC_PER_MSEC);
ec156764
IM		 774#endif
775
ad236fd2 776 printf("\n");
ec156764 777
0e9b07e5
ACM		 778 if (sched->nr_sleep_corrections)
779 printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections);
780 sched->nr_sleep_corrections = 0;
ec156764
IM		 781}
782
0e9b07e5 783static void test_calibrations(struct perf_sched *sched)
ec156764 784{
b1ffe8f3 785 u64 T0, T1;
ec156764
IM		 786
787 T0 = get_nsecs();
4fc76e49 788 burn_nsecs(sched, NSEC_PER_MSEC);
ec156764
IM		 789 T1 = get_nsecs();
790
9486aa38 791 printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
ec156764
IM		 792
793 T0 = get_nsecs();
4fc76e49 794 sleep_nsecs(NSEC_PER_MSEC);
ec156764
IM		 795 T1 = get_nsecs();
796
9486aa38 797 printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
ec156764
IM		 798}
799
a116e05d 800static int
0e9b07e5 801replay_wakeup_event(struct perf_sched *sched,
9ec3f4e4
ACM		 802 struct perf_evsel *evsel, struct perf_sample *sample,
803 struct machine *machine __maybe_unused)
419ab0d6 804{
9ec3f4e4
ACM		 805 const char *comm = perf_evsel__strval(evsel, sample, "comm");
806 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
419ab0d6 807 struct task_desc *waker, *wakee;
fbf94829 808
bb963e16 809 if (verbose > 0) {
2b7fcbc5 810 printf("sched_wakeup event %p\n", evsel);
fbf94829 811
9ec3f4e4 812 printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
ad236fd2 813 }
fbf94829 814
2b7fcbc5 815 waker = register_pid(sched, sample->tid, "<unknown>");
9ec3f4e4 816 wakee = register_pid(sched, pid, comm);
fbf94829 817
0e9b07e5 818 add_sched_event_wakeup(sched, waker, sample->time, wakee);
a116e05d 819 return 0;
ec156764
IM		 820}
821
9ec3f4e4
ACM		 822static int replay_switch_event(struct perf_sched *sched,
823 struct perf_evsel *evsel,
824 struct perf_sample *sample,
825 struct machine *machine __maybe_unused)
ec156764 826{
9ec3f4e4
ACM		 827 const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
828 *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
829 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
830 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
831 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
1d037ca1 832 struct task_desc *prev, __maybe_unused *next;
7f7f8d0b
ACM		 833 u64 timestamp0, timestamp = sample->time;
834 int cpu = sample->cpu;
fbf94829
IM		 835 s64 delta;
836
bb963e16 837 if (verbose > 0)
2b7fcbc5 838 printf("sched_switch event %p\n", evsel);
ad236fd2 839
fbf94829 840 if (cpu >= MAX_CPUS || cpu < 0)
a116e05d 841 return 0;
fbf94829 842
0e9b07e5 843 timestamp0 = sched->cpu_last_switched[cpu];
fbf94829
IM		 844 if (timestamp0)
845 delta = timestamp - timestamp0;
846 else
847 delta = 0;
848
a116e05d 849 if (delta < 0) {
60b7d14a 850 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
a116e05d
ACM		 851 return -1;
852 }
fbf94829 853
9ec3f4e4
ACM		 854 pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
855 prev_comm, prev_pid, next_comm, next_pid, delta);
fbf94829 856
9ec3f4e4
ACM		 857 prev = register_pid(sched, prev_pid, prev_comm);
858 next = register_pid(sched, next_pid, next_comm);
fbf94829 859
0e9b07e5 860 sched->cpu_last_switched[cpu] = timestamp;
fbf94829 861
0e9b07e5 862 add_sched_event_run(sched, prev, timestamp, delta);
9ec3f4e4 863 add_sched_event_sleep(sched, prev, timestamp, prev_state);
a116e05d
ACM		 864
865 return 0;
fbf94829
IM		 866}
867
cb627505
DA		 868static int replay_fork_event(struct perf_sched *sched,
869 union perf_event *event,
870 struct machine *machine)
419ab0d6 871{
cb627505
DA		 872 struct thread *child, *parent;
873
314add6b
AH		 874 child = machine__findnew_thread(machine, event->fork.pid,
875 event->fork.tid);
876 parent = machine__findnew_thread(machine, event->fork.ppid,
877 event->fork.ptid);
cb627505
DA		 878
879 if (child == NULL || parent == NULL) {
880 pr_debug("thread does not exist on fork event: child %p, parent %p\n",
881 child, parent);
b91fc39f 882 goto out_put;
cb627505 883 }
9ec3f4e4 884
bb963e16 885 if (verbose > 0) {
cb627505 886 printf("fork event\n");
b9c5143a
FW		 887 printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid);
888 printf("... child: %s/%d\n", thread__comm_str(child), child->tid);
419ab0d6 889 }
9ec3f4e4 890
b9c5143a
FW		 891 register_pid(sched, parent->tid, thread__comm_str(parent));
892 register_pid(sched, child->tid, thread__comm_str(child));
b91fc39f
ACM		 893out_put:
894 thread__put(child);
895 thread__put(parent);
a116e05d 896 return 0;
419ab0d6 897}
fbf94829 898
b1ffe8f3
IM		 899struct sort_dimension {
900 const char *name;
b5fae128 901 sort_fn_t cmp;
b1ffe8f3
IM		 902 struct list_head list;
903};
904
8640da9f
CD		 905/*
906 * handle runtime stats saved per thread
907 */
908static struct thread_runtime *thread__init_runtime(struct thread *thread)
909{
910 struct thread_runtime *r;
911
912 r = zalloc(sizeof(struct thread_runtime));
913 if (!r)
914 return NULL;
915
916 init_stats(&r->run_stats);
917 thread__set_priv(thread, r);
918
919 return r;
920}
921
922static struct thread_runtime *thread__get_runtime(struct thread *thread)
923{
924 struct thread_runtime *tr;
925
926 tr = thread__priv(thread);
927 if (tr == NULL) {
928 tr = thread__init_runtime(thread);
929 if (tr == NULL)
930 pr_debug("Failed to malloc memory for runtime data.\n");
931 }
932
933 return tr;
934}
935
daa1d7a5 936static int
39aeb52f 937thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 938{
939 struct sort_dimension *sort;
940 int ret = 0;
941
b5fae128
IM		 942 BUG_ON(list_empty(list));
943
daa1d7a5
FW		 944 list_for_each_entry(sort, list, list) {
945 ret = sort->cmp(l, r);
946 if (ret)
947 return ret;
948 }
949
950 return ret;
951}
952
39aeb52f 953static struct work_atoms *
cb4c13a5 954thread_atoms_search(struct rb_root_cached *root, struct thread *thread,
b5fae128
IM		 955 struct list_head *sort_list)
956{
cb4c13a5 957 struct rb_node *node = root->rb_root.rb_node;
39aeb52f 958 struct work_atoms key = { .thread = thread };
b5fae128
IM		 959
960 while (node) {
39aeb52f 961 struct work_atoms *atoms;
b5fae128
IM		 962 int cmp;
963
39aeb52f 964 atoms = container_of(node, struct work_atoms, node);
b5fae128
IM		 965
966 cmp = thread_lat_cmp(sort_list, &key, atoms);
967 if (cmp > 0)
968 node = node->rb_left;
969 else if (cmp < 0)
970 node = node->rb_right;
971 else {
972 BUG_ON(thread != atoms->thread);
973 return atoms;
974 }
975 }
976 return NULL;
977}
978
cdce9d73 979static void
cb4c13a5 980__thread_latency_insert(struct rb_root_cached *root, struct work_atoms *data,
daa1d7a5 981 struct list_head *sort_list)
cdce9d73 982{
cb4c13a5
DB		 983 struct rb_node **new = &(root->rb_root.rb_node), *parent = NULL;
984 bool leftmost = true;
cdce9d73
FW		 985
986 while (*new) {
39aeb52f 987 struct work_atoms *this;
daa1d7a5 988 int cmp;
cdce9d73 989
39aeb52f 990 this = container_of(*new, struct work_atoms, node);
cdce9d73 991 parent = *new;
daa1d7a5
FW		 992
993 cmp = thread_lat_cmp(sort_list, data, this);
994
995 if (cmp > 0)
cdce9d73 996 new = &((*new)->rb_left);
cb4c13a5 997 else {
daa1d7a5 998 new = &((*new)->rb_right);
cb4c13a5
DB		 999 leftmost = false;
1000 }
cdce9d73
FW		 1001 }
1002
1003 rb_link_node(&data->node, parent, new);
cb4c13a5 1004 rb_insert_color_cached(&data->node, root, leftmost);
cdce9d73
FW		 1005}
1006
0e9b07e5 1007static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
cdce9d73 1008{
36479484 1009 struct work_atoms *atoms = zalloc(sizeof(*atoms));
a116e05d
ACM		 1010 if (!atoms) {
1011 pr_err("No memory at %s\n", __func__);
1012 return -1;
1013 }
cdce9d73 1014
f3b623b8 1015 atoms->thread = thread__get(thread);
39aeb52f 1016 INIT_LIST_HEAD(&atoms->work_list);
0e9b07e5 1017 __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);
a116e05d 1018 return 0;
cdce9d73
FW		 1019}
1020
9ec3f4e4 1021static char sched_out_state(u64 prev_state)
cdce9d73
FW		 1022{
1023 const char *str = TASK_STATE_TO_CHAR_STR;
1024
9ec3f4e4 1025 return str[prev_state];
cdce9d73
FW		 1026}
1027
a116e05d 1028static int
39aeb52f 1029add_sched_out_event(struct work_atoms *atoms,
1030 char run_state,
1031 u64 timestamp)
cdce9d73 1032{
36479484 1033 struct work_atom *atom = zalloc(sizeof(*atom));
a116e05d
ACM		 1034 if (!atom) {
1035 pr_err("Non memory at %s", __func__);
1036 return -1;
1037 }
cdce9d73 1038
aa1ab9d2
FW		 1039 atom->sched_out_time = timestamp;
1040
39aeb52f 1041 if (run_state == 'R') {
b1ffe8f3 1042 atom->state = THREAD_WAIT_CPU;
aa1ab9d2 1043 atom->wake_up_time = atom->sched_out_time;
c6ced611
FW		 1044 }
1045
39aeb52f 1046 list_add_tail(&atom->list, &atoms->work_list);
a116e05d 1047 return 0;
cdce9d73
FW		 1048}
1049
1050static void
1d037ca1
IT		 1051add_runtime_event(struct work_atoms *atoms, u64 delta,
1052 u64 timestamp __maybe_unused)
39aeb52f 1053{
1054 struct work_atom *atom;
1055
1056 BUG_ON(list_empty(&atoms->work_list));
1057
1058 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1059
1060 atom->runtime += delta;
1061 atoms->total_runtime += delta;
1062}
1063
1064static void
1065add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
cdce9d73 1066{
b1ffe8f3 1067 struct work_atom *atom;
66685678 1068 u64 delta;
cdce9d73 1069
39aeb52f 1070 if (list_empty(&atoms->work_list))
cdce9d73
FW		 1071 return;
1072
39aeb52f 1073 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
cdce9d73 1074
b1ffe8f3 1075 if (atom->state != THREAD_WAIT_CPU)
cdce9d73
FW		 1076 return;
1077
b1ffe8f3
IM		 1078 if (timestamp < atom->wake_up_time) {
1079 atom->state = THREAD_IGNORE;
cdce9d73
FW		 1080 return;
1081 }
1082
b1ffe8f3
IM		 1083 atom->state = THREAD_SCHED_IN;
1084 atom->sched_in_time = timestamp;
66685678 1085
b1ffe8f3 1086 delta = atom->sched_in_time - atom->wake_up_time;
66685678 1087 atoms->total_lat += delta;
3786310a 1088 if (delta > atoms->max_lat) {
66685678 1089 atoms->max_lat = delta;
3786310a
FW		 1090 atoms->max_lat_at = timestamp;
1091 }
66685678 1092 atoms->nb_atoms++;
cdce9d73
FW		 1093}
1094
9ec3f4e4
ACM		 1095static int latency_switch_event(struct perf_sched *sched,
1096 struct perf_evsel *evsel,
1097 struct perf_sample *sample,
1098 struct machine *machine)
cdce9d73 1099{
9ec3f4e4
ACM		 1100 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1101 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1102 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
39aeb52f 1103 struct work_atoms *out_events, *in_events;
cdce9d73 1104 struct thread *sched_out, *sched_in;
7f7f8d0b 1105 u64 timestamp0, timestamp = sample->time;
b91fc39f 1106 int cpu = sample->cpu, err = -1;
ea92ed5a
IM		 1107 s64 delta;
1108
39aeb52f 1109 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
ea92ed5a 1110
0e9b07e5
ACM		 1111 timestamp0 = sched->cpu_last_switched[cpu];
1112 sched->cpu_last_switched[cpu] = timestamp;
ea92ed5a
IM		 1113 if (timestamp0)
1114 delta = timestamp - timestamp0;
1115 else
1116 delta = 0;
1117
a116e05d
ACM		 1118 if (delta < 0) {
1119 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1120 return -1;
1121 }
cdce9d73 1122
1fcb8768
AH		 1123 sched_out = machine__findnew_thread(machine, -1, prev_pid);
1124 sched_in = machine__findnew_thread(machine, -1, next_pid);
b91fc39f
ACM		 1125 if (sched_out == NULL || sched_in == NULL)
1126 goto out_put;
cdce9d73 1127
0e9b07e5 1128 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
39aeb52f 1129 if (!out_events) {
0e9b07e5 1130 if (thread_atoms_insert(sched, sched_out))
b91fc39f 1131 goto out_put;
0e9b07e5 1132 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
a116e05d
ACM		 1133 if (!out_events) {
1134 pr_err("out-event: Internal tree error");
b91fc39f 1135 goto out_put;
a116e05d 1136 }
39aeb52f 1137 }
9ec3f4e4 1138 if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
a116e05d 1139 return -1;
39aeb52f 1140
0e9b07e5 1141 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
39aeb52f 1142 if (!in_events) {
0e9b07e5 1143 if (thread_atoms_insert(sched, sched_in))
b91fc39f 1144 goto out_put;
0e9b07e5 1145 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
a116e05d
ACM		 1146 if (!in_events) {
1147 pr_err("in-event: Internal tree error");
b91fc39f 1148 goto out_put;
a116e05d 1149 }
39aeb52f 1150 /*
1151 * Take came in we have not heard about yet,
1152 * add in an initial atom in runnable state:
1153 */
a116e05d 1154 if (add_sched_out_event(in_events, 'R', timestamp))
b91fc39f 1155 goto out_put;
cdce9d73 1156 }
39aeb52f 1157 add_sched_in_event(in_events, timestamp);
b91fc39f
ACM		 1158 err = 0;
1159out_put:
1160 thread__put(sched_out);
1161 thread__put(sched_in);
1162 return err;
39aeb52f 1163}
cdce9d73 1164
9ec3f4e4
ACM		 1165static int latency_runtime_event(struct perf_sched *sched,
1166 struct perf_evsel *evsel,
1167 struct perf_sample *sample,
1168 struct machine *machine)
39aeb52f 1169{
9ec3f4e4
ACM		 1170 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
1171 const u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
1fcb8768 1172 struct thread *thread = machine__findnew_thread(machine, -1, pid);
0e9b07e5 1173 struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
7f7f8d0b 1174 u64 timestamp = sample->time;
b91fc39f
ACM		 1175 int cpu = sample->cpu, err = -1;
1176
1177 if (thread == NULL)
1178 return -1;
39aeb52f 1179
1180 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
39aeb52f 1181 if (!atoms) {
0e9b07e5 1182 if (thread_atoms_insert(sched, thread))
b91fc39f 1183 goto out_put;
0e9b07e5 1184 atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
a116e05d 1185 if (!atoms) {
60b7d14a 1186 pr_err("in-event: Internal tree error");
b91fc39f 1187 goto out_put;
a116e05d
ACM		 1188 }
1189 if (add_sched_out_event(atoms, 'R', timestamp))
b91fc39f 1190 goto out_put;
cdce9d73
FW		 1191 }
1192
9ec3f4e4 1193 add_runtime_event(atoms, runtime, timestamp);
b91fc39f
ACM		 1194 err = 0;
1195out_put:
1196 thread__put(thread);
1197 return err;
cdce9d73
FW		 1198}
1199
9ec3f4e4
ACM		 1200static int latency_wakeup_event(struct perf_sched *sched,
1201 struct perf_evsel *evsel,
1202 struct perf_sample *sample,
1203 struct machine *machine)
cdce9d73 1204{
0680ee7d 1205 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
39aeb52f 1206 struct work_atoms *atoms;
b1ffe8f3 1207 struct work_atom *atom;
cdce9d73 1208 struct thread *wakee;
7f7f8d0b 1209 u64 timestamp = sample->time;
b91fc39f 1210 int err = -1;
cdce9d73 1211
1fcb8768 1212 wakee = machine__findnew_thread(machine, -1, pid);
b91fc39f
ACM		 1213 if (wakee == NULL)
1214 return -1;
0e9b07e5 1215 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
17562205 1216 if (!atoms) {
0e9b07e5 1217 if (thread_atoms_insert(sched, wakee))
b91fc39f 1218 goto out_put;
0e9b07e5 1219 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
a116e05d 1220 if (!atoms) {
60b7d14a 1221 pr_err("wakeup-event: Internal tree error");
b91fc39f 1222 goto out_put;
a116e05d
ACM		 1223 }
1224 if (add_sched_out_event(atoms, 'S', timestamp))
b91fc39f 1225 goto out_put;
cdce9d73
FW		 1226 }
1227
39aeb52f 1228 BUG_ON(list_empty(&atoms->work_list));
cdce9d73 1229
39aeb52f 1230 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
cdce9d73 1231
55ffb7a6 1232 /*
67d6259d
DY		 1233 * As we do not guarantee the wakeup event happens when
1234 * task is out of run queue, also may happen when task is
1235 * on run queue and wakeup only change ->state to TASK_RUNNING,
1236 * then we should not set the ->wake_up_time when wake up a
1237 * task which is on run queue.
1238 *
55ffb7a6
MG		 1239 * You WILL be missing events if you've recorded only
1240 * one CPU, or are only looking at only one, so don't
67d6259d 1241 * skip in this case.
55ffb7a6 1242 */
0e9b07e5 1243 if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
b91fc39f 1244 goto out_ok;
cdce9d73 1245
0e9b07e5 1246 sched->nr_timestamps++;
ea57c4f5 1247 if (atom->sched_out_time > timestamp) {
0e9b07e5 1248 sched->nr_unordered_timestamps++;
b91fc39f 1249 goto out_ok;
ea57c4f5 1250 }
aa1ab9d2 1251
b1ffe8f3
IM		 1252 atom->state = THREAD_WAIT_CPU;
1253 atom->wake_up_time = timestamp;
b91fc39f
ACM		 1254out_ok:
1255 err = 0;
1256out_put:
1257 thread__put(wakee);
1258 return err;
cdce9d73
FW		 1259}
1260
9ec3f4e4
ACM		 1261static int latency_migrate_task_event(struct perf_sched *sched,
1262 struct perf_evsel *evsel,
1263 struct perf_sample *sample,
1264 struct machine *machine)
55ffb7a6 1265{
9ec3f4e4 1266 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
7f7f8d0b 1267 u64 timestamp = sample->time;
55ffb7a6
MG		 1268 struct work_atoms *atoms;
1269 struct work_atom *atom;
1270 struct thread *migrant;
b91fc39f 1271 int err = -1;
55ffb7a6
MG		 1272
1273 /*
1274 * Only need to worry about migration when profiling one CPU.
1275 */
0e9b07e5 1276 if (sched->profile_cpu == -1)
a116e05d 1277 return 0;
55ffb7a6 1278
1fcb8768 1279 migrant = machine__findnew_thread(machine, -1, pid);
b91fc39f
ACM		 1280 if (migrant == NULL)
1281 return -1;
0e9b07e5 1282 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
55ffb7a6 1283 if (!atoms) {
0e9b07e5 1284 if (thread_atoms_insert(sched, migrant))
b91fc39f 1285 goto out_put;
b9c5143a 1286 register_pid(sched, migrant->tid, thread__comm_str(migrant));
0e9b07e5 1287 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
a116e05d 1288 if (!atoms) {
60b7d14a 1289 pr_err("migration-event: Internal tree error");
b91fc39f 1290 goto out_put;
a116e05d
ACM		 1291 }
1292 if (add_sched_out_event(atoms, 'R', timestamp))
b91fc39f 1293 goto out_put;
55ffb7a6
MG		 1294 }
1295
1296 BUG_ON(list_empty(&atoms->work_list));
1297
1298 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1299 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1300
0e9b07e5 1301 sched->nr_timestamps++;
55ffb7a6
MG		 1302
1303 if (atom->sched_out_time > timestamp)
0e9b07e5 1304 sched->nr_unordered_timestamps++;
b91fc39f
ACM		 1305 err = 0;
1306out_put:
1307 thread__put(migrant);
1308 return err;
55ffb7a6
MG		 1309}
1310
0e9b07e5 1311static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list)
cdce9d73 1312{
cdce9d73
FW		 1313 int i;
1314 int ret;
66685678 1315 u64 avg;
99620a5d 1316 char max_lat_at[32];
cdce9d73 1317
39aeb52f 1318 if (!work_list->nb_atoms)
cdce9d73 1319 return;
ea57c4f5
IM		 1320 /*
1321 * Ignore idle threads:
1322 */
b9c5143a 1323 if (!strcmp(thread__comm_str(work_list->thread), "swapper"))
ea57c4f5 1324 return;
cdce9d73 1325
0e9b07e5
ACM		 1326 sched->all_runtime += work_list->total_runtime;
1327 sched->all_count += work_list->nb_atoms;
66685678 1328
2f80dd44
JB		 1329 if (work_list->num_merged > 1)
1330 ret = printf(" %s:(%d) ", thread__comm_str(work_list->thread), work_list->num_merged);
1331 else
1332 ret = printf(" %s:%d ", thread__comm_str(work_list->thread), work_list->thread->tid);
cdce9d73 1333
08f69e6c 1334 for (i = 0; i < 24 - ret; i++)
cdce9d73
FW		 1335 printf(" ");
1336
39aeb52f 1337 avg = work_list->total_lat / work_list->nb_atoms;
99620a5d 1338 timestamp__scnprintf_usec(work_list->max_lat_at, max_lat_at, sizeof(max_lat_at));
cdce9d73 1339
99620a5d 1340 printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13s s\n",
4fc76e49
ACM		 1341 (double)work_list->total_runtime / NSEC_PER_MSEC,
1342 work_list->nb_atoms, (double)avg / NSEC_PER_MSEC,
1343 (double)work_list->max_lat / NSEC_PER_MSEC,
99620a5d 1344 max_lat_at);
cdce9d73
FW		 1345}
1346
39aeb52f 1347static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5 1348{
0014de17
JO		 1349 if (l->thread == r->thread)
1350 return 0;
38051234 1351 if (l->thread->tid < r->thread->tid)
daa1d7a5 1352 return -1;
38051234 1353 if (l->thread->tid > r->thread->tid)
daa1d7a5 1354 return 1;
0014de17 1355 return (int)(l->thread - r->thread);
daa1d7a5
FW		 1356}
1357
39aeb52f 1358static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1359{
1360 u64 avgl, avgr;
1361
1362 if (!l->nb_atoms)
1363 return -1;
1364
1365 if (!r->nb_atoms)
1366 return 1;
1367
1368 avgl = l->total_lat / l->nb_atoms;
1369 avgr = r->total_lat / r->nb_atoms;
1370
1371 if (avgl < avgr)
1372 return -1;
1373 if (avgl > avgr)
1374 return 1;
1375
1376 return 0;
1377}
1378
39aeb52f 1379static int max_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1380{
1381 if (l->max_lat < r->max_lat)
1382 return -1;
1383 if (l->max_lat > r->max_lat)
1384 return 1;
1385
1386 return 0;
1387}
1388
39aeb52f 1389static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1390{
1391 if (l->nb_atoms < r->nb_atoms)
1392 return -1;
1393 if (l->nb_atoms > r->nb_atoms)
1394 return 1;
1395
1396 return 0;
1397}
1398
39aeb52f 1399static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
daa1d7a5
FW		 1400{
1401 if (l->total_runtime < r->total_runtime)
1402 return -1;
1403 if (l->total_runtime > r->total_runtime)
1404 return 1;
1405
1406 return 0;
1407}
1408
cbef79a8 1409static int sort_dimension__add(const char *tok, struct list_head *list)
daa1d7a5 1410{
0e9b07e5
ACM		 1411 size_t i;
1412 static struct sort_dimension avg_sort_dimension = {
1413 .name = "avg",
1414 .cmp = avg_cmp,
1415 };
1416 static struct sort_dimension max_sort_dimension = {
1417 .name = "max",
1418 .cmp = max_cmp,
1419 };
1420 static struct sort_dimension pid_sort_dimension = {
1421 .name = "pid",
1422 .cmp = pid_cmp,
1423 };
1424 static struct sort_dimension runtime_sort_dimension = {
1425 .name = "runtime",
1426 .cmp = runtime_cmp,
1427 };
1428 static struct sort_dimension switch_sort_dimension = {
1429 .name = "switch",
1430 .cmp = switch_cmp,
1431 };
1432 struct sort_dimension *available_sorts[] = {
1433 &pid_sort_dimension,
1434 &avg_sort_dimension,
1435 &max_sort_dimension,
1436 &switch_sort_dimension,
1437 &runtime_sort_dimension,
1438 };
daa1d7a5 1439
0e9b07e5 1440 for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
daa1d7a5
FW		 1441 if (!strcmp(available_sorts[i]->name, tok)) {
1442 list_add_tail(&available_sorts[i]->list, list);
1443
1444 return 0;
1445 }
1446 }
1447
1448 return -1;
1449}
1450
0e9b07e5 1451static void perf_sched__sort_lat(struct perf_sched *sched)
daa1d7a5
FW		 1452{
1453 struct rb_node *node;
cb4c13a5 1454 struct rb_root_cached *root = &sched->atom_root;
2f80dd44 1455again:
daa1d7a5 1456 for (;;) {
39aeb52f 1457 struct work_atoms *data;
cb4c13a5 1458 node = rb_first_cached(root);
daa1d7a5
FW		 1459 if (!node)
1460 break;
1461
cb4c13a5 1462 rb_erase_cached(node, root);
39aeb52f 1463 data = rb_entry(node, struct work_atoms, node);
0e9b07e5 1464 __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list);
daa1d7a5 1465 }
2f80dd44
JB		 1466 if (root == &sched->atom_root) {
1467 root = &sched->merged_atom_root;
1468 goto again;
1469 }
daa1d7a5
FW		 1470}
1471
0e9b07e5 1472static int process_sched_wakeup_event(struct perf_tool *tool,
2b7fcbc5 1473 struct perf_evsel *evsel,
1d037ca1 1474 struct perf_sample *sample,
4218e673 1475 struct machine *machine)
419ab0d6 1476{
0e9b07e5 1477 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
419ab0d6 1478
9ec3f4e4
ACM		 1479 if (sched->tp_handler->wakeup_event)
1480 return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
a116e05d 1481
2b7fcbc5 1482 return 0;
419ab0d6
FW		 1483}
1484
a151a37a
JO		 1485union map_priv {
1486 void *ptr;
1487 bool color;
1488};
1489
1490static bool thread__has_color(struct thread *thread)
1491{
1492 union map_priv priv = {
1493 .ptr = thread__priv(thread),
1494 };
1495
1496 return priv.color;
1497}
1498
1499static struct thread*
1500map__findnew_thread(struct perf_sched *sched, struct machine *machine, pid_t pid, pid_t tid)
1501{
1502 struct thread *thread = machine__findnew_thread(machine, pid, tid);
1503 union map_priv priv = {
1504 .color = false,
1505 };
1506
1507 if (!sched->map.color_pids || !thread || thread__priv(thread))
1508 return thread;
1509
1510 if (thread_map__has(sched->map.color_pids, tid))
1511 priv.color = true;
1512
1513 thread__set_priv(thread, priv.ptr);
1514 return thread;
1515}
1516
9ec3f4e4
ACM		 1517static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
1518 struct perf_sample *sample, struct machine *machine)
0ec04e16 1519{
9d372ca5
DY		 1520 const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1521 struct thread *sched_in;
8640da9f 1522 struct thread_runtime *tr;
0ec04e16 1523 int new_shortname;
7f7f8d0b 1524 u64 timestamp0, timestamp = sample->time;
0ec04e16 1525 s64 delta;
99623c62
JO		 1526 int i, this_cpu = sample->cpu;
1527 int cpus_nr;
1528 bool new_cpu = false;
8cd91195 1529 const char *color = PERF_COLOR_NORMAL;
99620a5d 1530 char stimestamp[32];
0ec04e16
IM		 1531
1532 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1533
0e9b07e5
ACM		 1534 if (this_cpu > sched->max_cpu)
1535 sched->max_cpu = this_cpu;
0ec04e16 1536
99623c62
JO		 1537 if (sched->map.comp) {
1538 cpus_nr = bitmap_weight(sched->map.comp_cpus_mask, MAX_CPUS);
1539 if (!test_and_set_bit(this_cpu, sched->map.comp_cpus_mask)) {
1540 sched->map.comp_cpus[cpus_nr++] = this_cpu;
1541 new_cpu = true;
1542 }
1543 } else
1544 cpus_nr = sched->max_cpu;
1545
0e9b07e5
ACM		 1546 timestamp0 = sched->cpu_last_switched[this_cpu];
1547 sched->cpu_last_switched[this_cpu] = timestamp;
0ec04e16
IM		 1548 if (timestamp0)
1549 delta = timestamp - timestamp0;
1550 else
1551 delta = 0;
1552
a116e05d 1553 if (delta < 0) {
60b7d14a 1554 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
a116e05d
ACM		 1555 return -1;
1556 }
0ec04e16 1557
a151a37a 1558 sched_in = map__findnew_thread(sched, machine, -1, next_pid);
b91fc39f
ACM		 1559 if (sched_in == NULL)
1560 return -1;
0ec04e16 1561
8640da9f
CD		 1562 tr = thread__get_runtime(sched_in);
1563 if (tr == NULL) {
1564 thread__put(sched_in);
1565 return -1;
1566 }
1567
b91fc39f 1568 sched->curr_thread[this_cpu] = thread__get(sched_in);
0ec04e16
IM		 1569
1570 printf(" ");
1571
1572 new_shortname = 0;
8640da9f 1573 if (!tr->shortname[0]) {
6bcab4e1
D		 1574 if (!strcmp(thread__comm_str(sched_in), "swapper")) {
1575 /*
1576 * Don't allocate a letter-number for swapper:0
1577 * as a shortname. Instead, we use '.' for it.
1578 */
8640da9f
CD		 1579 tr->shortname[0] = '.';
1580 tr->shortname[1] = ' ';
0ec04e16 1581 } else {
8640da9f
CD		 1582 tr->shortname[0] = sched->next_shortname1;
1583 tr->shortname[1] = sched->next_shortname2;
6bcab4e1
D		 1584
1585 if (sched->next_shortname1 < 'Z') {
1586 sched->next_shortname1++;
0ec04e16 1587 } else {
6bcab4e1
D		 1588 sched->next_shortname1 = 'A';
1589 if (sched->next_shortname2 < '9')
1590 sched->next_shortname2++;
1591 else
1592 sched->next_shortname2 = '0';
0ec04e16
IM		 1593 }
1594 }
1595 new_shortname = 1;
1596 }
1597
99623c62
JO		 1598 for (i = 0; i < cpus_nr; i++) {
1599 int cpu = sched->map.comp ? sched->map.comp_cpus[i] : i;
a151a37a 1600 struct thread *curr_thread = sched->curr_thread[cpu];
8640da9f 1601 struct thread_runtime *curr_tr;
a151a37a 1602 const char *pid_color = color;
cf294f24 1603 const char *cpu_color = color;
a151a37a
JO		 1604
1605 if (curr_thread && thread__has_color(curr_thread))
1606 pid_color = COLOR_PIDS;
99623c62 1607
73643bb6
JO		 1608 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, cpu))
1609 continue;
1610
cf294f24
JO		 1611 if (sched->map.color_cpus && cpu_map__has(sched->map.color_cpus, cpu))
1612 cpu_color = COLOR_CPUS;
1613
0ec04e16 1614 if (cpu != this_cpu)
1208bb27 1615 color_fprintf(stdout, color, " ");
0ec04e16 1616 else
cf294f24 1617 color_fprintf(stdout, cpu_color, "*");
0ec04e16 1618
8640da9f
CD		 1619 if (sched->curr_thread[cpu]) {
1620 curr_tr = thread__get_runtime(sched->curr_thread[cpu]);
1621 if (curr_tr == NULL) {
1622 thread__put(sched_in);
1623 return -1;
1624 }
1625 color_fprintf(stdout, pid_color, "%2s ", curr_tr->shortname);
1626 } else
8cd91195 1627 color_fprintf(stdout, color, " ");
0ec04e16
IM		 1628 }
1629
73643bb6
JO		 1630 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, this_cpu))
1631 goto out;
1632
99620a5d
NK		 1633 timestamp__scnprintf_usec(timestamp, stimestamp, sizeof(stimestamp));
1634 color_fprintf(stdout, color, " %12s secs ", stimestamp);
99a3c3a9 1635 if (new_shortname || tr->comm_changed || (verbose > 0 && sched_in->tid)) {
a151a37a
JO		 1636 const char *pid_color = color;
1637
1638 if (thread__has_color(sched_in))
1639 pid_color = COLOR_PIDS;
1640
1641 color_fprintf(stdout, pid_color, "%s => %s:%d",
8640da9f 1642 tr->shortname, thread__comm_str(sched_in), sched_in->tid);
99a3c3a9 1643 tr->comm_changed = false;
0ec04e16 1644 }
a116e05d 1645
99623c62 1646 if (sched->map.comp && new_cpu)
8cd91195 1647 color_fprintf(stdout, color, " (CPU %d)", this_cpu);
99623c62 1648
73643bb6 1649out:
8cd91195 1650 color_fprintf(stdout, color, "\n");
99623c62 1651
b91fc39f
ACM		 1652 thread__put(sched_in);
1653
a116e05d 1654 return 0;
0ec04e16
IM		 1655}
1656
0e9b07e5 1657static int process_sched_switch_event(struct perf_tool *tool,
2b7fcbc5 1658 struct perf_evsel *evsel,
1d037ca1 1659 struct perf_sample *sample,
4218e673 1660 struct machine *machine)
419ab0d6 1661{
0e9b07e5 1662 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
a116e05d 1663 int this_cpu = sample->cpu, err = 0;
2b7fcbc5
ACM		 1664 u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1665 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
419ab0d6 1666
0e9b07e5 1667 if (sched->curr_pid[this_cpu] != (u32)-1) {
c8a37751
IM		 1668 /*
1669 * Are we trying to switch away a PID that is
1670 * not current?
1671 */
2b7fcbc5 1672 if (sched->curr_pid[this_cpu] != prev_pid)
0e9b07e5 1673 sched->nr_context_switch_bugs++;
c8a37751 1674 }
c8a37751 1675
9ec3f4e4
ACM		 1676 if (sched->tp_handler->switch_event)
1677 err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
2b7fcbc5
ACM		 1678
1679 sched->curr_pid[this_cpu] = next_pid;
a116e05d 1680 return err;
419ab0d6
FW		 1681}
1682
0e9b07e5 1683static int process_sched_runtime_event(struct perf_tool *tool,
2b7fcbc5 1684 struct perf_evsel *evsel,
1d037ca1 1685 struct perf_sample *sample,
4218e673 1686 struct machine *machine)
39aeb52f 1687{
0e9b07e5 1688 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
39aeb52f 1689
9ec3f4e4
ACM		 1690 if (sched->tp_handler->runtime_event)
1691 return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
a116e05d 1692
2b7fcbc5 1693 return 0;
39aeb52f 1694}
1695
cb627505
DA		 1696static int perf_sched__process_fork_event(struct perf_tool *tool,
1697 union perf_event *event,
1698 struct perf_sample *sample,
1699 struct machine *machine)
fbf94829 1700{
0e9b07e5 1701 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
46538818 1702
cb627505
DA		 1703 /* run the fork event through the perf machineruy */
1704 perf_event__process_fork(tool, event, sample, machine);
1705
1706 /* and then run additional processing needed for this command */
9ec3f4e4 1707 if (sched->tp_handler->fork_event)
cb627505 1708 return sched->tp_handler->fork_event(sched, event, machine);
a116e05d 1709
2b7fcbc5 1710 return 0;
fbf94829
IM		 1711}
1712
0e9b07e5 1713static int process_sched_migrate_task_event(struct perf_tool *tool,
2b7fcbc5 1714 struct perf_evsel *evsel,
1d037ca1 1715 struct perf_sample *sample,
4218e673 1716 struct machine *machine)
55ffb7a6 1717{
0e9b07e5 1718 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
55ffb7a6 1719
9ec3f4e4
ACM		 1720 if (sched->tp_handler->migrate_task_event)
1721 return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
a116e05d 1722
2b7fcbc5 1723 return 0;
55ffb7a6
MG		 1724}
1725
a116e05d 1726typedef int (*tracepoint_handler)(struct perf_tool *tool,
2b7fcbc5 1727 struct perf_evsel *evsel,
a116e05d 1728 struct perf_sample *sample,
4218e673 1729 struct machine *machine);
ec156764 1730
1d037ca1
IT		 1731static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
1732 union perf_event *event __maybe_unused,
ee29be62
ACM		 1733 struct perf_sample *sample,
1734 struct perf_evsel *evsel,
1735 struct machine *machine)
0a02ad93 1736{
a116e05d 1737 int err = 0;
0a02ad93 1738
744a9719
ACM		 1739 if (evsel->handler != NULL) {
1740 tracepoint_handler f = evsel->handler;
2b7fcbc5 1741 err = f(tool, evsel, sample, machine);
ee29be62 1742 }
0a02ad93 1743
a116e05d 1744 return err;
0a02ad93
IM		 1745}
1746
99a3c3a9
CD		 1747static int perf_sched__process_comm(struct perf_tool *tool __maybe_unused,
1748 union perf_event *event,
1749 struct perf_sample *sample,
1750 struct machine *machine)
1751{
1752 struct thread *thread;
1753 struct thread_runtime *tr;
1754 int err;
1755
1756 err = perf_event__process_comm(tool, event, sample, machine);
1757 if (err)
1758 return err;
1759
1760 thread = machine__find_thread(machine, sample->pid, sample->tid);
1761 if (!thread) {
1762 pr_err("Internal error: can't find thread\n");
1763 return -1;
1764 }
1765
1766 tr = thread__get_runtime(thread);
1767 if (tr == NULL) {
1768 thread__put(thread);
1769 return -1;
1770 }
1771
1772 tr->comm_changed = true;
1773 thread__put(thread);
1774
1775 return 0;
1776}
1777
ae536acf 1778static int perf_sched__read_events(struct perf_sched *sched)
0a02ad93 1779{
ee29be62
ACM		 1780 const struct perf_evsel_str_handler handlers[] = {
1781 { "sched:sched_switch", process_sched_switch_event, },
1782 { "sched:sched_stat_runtime", process_sched_runtime_event, },
1783 { "sched:sched_wakeup", process_sched_wakeup_event, },
1784 { "sched:sched_wakeup_new", process_sched_wakeup_event, },
ee29be62
ACM		 1785 { "sched:sched_migrate_task", process_sched_migrate_task_event, },
1786 };
da378962 1787 struct perf_session *session;
8ceb41d7 1788 struct perf_data data = {
2d4f2799
JO		 1789 .path = input_name,
1790 .mode = PERF_DATA_MODE_READ,
1791 .force = sched->force,
f5fc1412 1792 };
ae536acf 1793 int rc = -1;
da378962 1794
8ceb41d7 1795 session = perf_session__new(&data, false, &sched->tool);
a116e05d
ACM		 1796 if (session == NULL) {
1797 pr_debug("No Memory for session\n");
1798 return -1;
1799 }
94c744b6 1800
0a7e6d1b 1801 symbol__init(&session->header.env);
04934106 1802
a116e05d
ACM		 1803 if (perf_session__set_tracepoints_handlers(session, handlers))
1804 goto out_delete;
ee29be62 1805
cee75ac7 1806 if (perf_session__has_traces(session, "record -R")) {
b7b61cbe 1807 int err = perf_session__process_events(session);
a116e05d
ACM		 1808 if (err) {
1809 pr_err("Failed to process events, error %d", err);
1810 goto out_delete;
1811 }
4c09bafa 1812
75be989a
ACM		 1813 sched->nr_events = session->evlist->stats.nr_events[0];
1814 sched->nr_lost_events = session->evlist->stats.total_lost;
1815 sched->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST];
cee75ac7 1816 }
d549c769 1817
ae536acf 1818 rc = 0;
a116e05d
ACM		 1819out_delete:
1820 perf_session__delete(session);
ae536acf 1821 return rc;
0a02ad93
IM		 1822}
1823
49394a2a
DA		 1824/*
1825 * scheduling times are printed as msec.usec
1826 */
1827static inline void print_sched_time(unsigned long long nsecs, int width)
1828{
1829 unsigned long msecs;
1830 unsigned long usecs;
1831
1832 msecs = nsecs / NSEC_PER_MSEC;
1833 nsecs -= msecs * NSEC_PER_MSEC;
1834 usecs = nsecs / NSEC_PER_USEC;
1835 printf("%*lu.%03lu ", width, msecs, usecs);
1836}
1837
1838/*
1839 * returns runtime data for event, allocating memory for it the
1840 * first time it is used.
1841 */
1842static struct evsel_runtime *perf_evsel__get_runtime(struct perf_evsel *evsel)
1843{
1844 struct evsel_runtime *r = evsel->priv;
1845
1846 if (r == NULL) {
1847 r = zalloc(sizeof(struct evsel_runtime));
1848 evsel->priv = r;
1849 }
1850
1851 return r;
1852}
1853
1854/*
1855 * save last time event was seen per cpu
1856 */
1857static void perf_evsel__save_time(struct perf_evsel *evsel,
1858 u64 timestamp, u32 cpu)
1859{
1860 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1861
1862 if (r == NULL)
1863 return;
1864
1865 if ((cpu >= r->ncpu) || (r->last_time == NULL)) {
1866 int i, n = __roundup_pow_of_two(cpu+1);
1867 void *p = r->last_time;
1868
1869 p = realloc(r->last_time, n * sizeof(u64));
1870 if (!p)
1871 return;
1872
1873 r->last_time = p;
1874 for (i = r->ncpu; i < n; ++i)
1875 r->last_time[i] = (u64) 0;
1876
1877 r->ncpu = n;
1878 }
1879
1880 r->last_time[cpu] = timestamp;
1881}
1882
1883/* returns last time this event was seen on the given cpu */
1884static u64 perf_evsel__get_time(struct perf_evsel *evsel, u32 cpu)
1885{
1886 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1887
1888 if ((r == NULL) || (r->last_time == NULL) || (cpu >= r->ncpu))
1889 return 0;
1890
1891 return r->last_time[cpu];
1892}
1893
9b8087d7 1894static int comm_width = 30;
49394a2a
DA		 1895
1896static char *timehist_get_commstr(struct thread *thread)
1897{
1898 static char str[32];
1899 const char *comm = thread__comm_str(thread);
1900 pid_t tid = thread->tid;
1901 pid_t pid = thread->pid_;
1902 int n;
1903
1904 if (pid == 0)
1905 n = scnprintf(str, sizeof(str), "%s", comm);
1906
1907 else if (tid != pid)
1908 n = scnprintf(str, sizeof(str), "%s[%d/%d]", comm, tid, pid);
1909
1910 else
1911 n = scnprintf(str, sizeof(str), "%s[%d]", comm, tid);
1912
1913 if (n > comm_width)
1914 comm_width = n;
1915
1916 return str;
1917}
1918
a407b067 1919static void timehist_header(struct perf_sched *sched)
49394a2a 1920{
a407b067
DA		 1921 u32 ncpus = sched->max_cpu + 1;
1922 u32 i, j;
1923
49394a2a
DA		 1924 printf("%15s %6s ", "time", "cpu");
1925
a407b067
DA		 1926 if (sched->show_cpu_visual) {
1927 printf(" ");
1928 for (i = 0, j = 0; i < ncpus; ++i) {
1929 printf("%x", j++);
1930 if (j > 15)
1931 j = 0;
1932 }
1933 printf(" ");
1934 }
1935
0e6758e8 1936 printf(" %-*s %9s %9s %9s", comm_width,
49394a2a
DA		 1937 "task name", "wait time", "sch delay", "run time");
1938
414e050c
NK		 1939 if (sched->show_state)
1940 printf(" %s", "state");
1941
49394a2a
DA		 1942 printf("\n");
1943
1944 /*
1945 * units row
1946 */
1947 printf("%15s %-6s ", "", "");
1948
a407b067
DA		 1949 if (sched->show_cpu_visual)
1950 printf(" %*s ", ncpus, "");
1951
414e050c 1952 printf(" %-*s %9s %9s %9s", comm_width,
0e6758e8 1953 "[tid/pid]", "(msec)", "(msec)", "(msec)");
49394a2a 1954
414e050c
NK		 1955 if (sched->show_state)
1956 printf(" %5s", "");
1957
1958 printf("\n");
1959
49394a2a
DA		 1960 /*
1961 * separator
1962 */
1963 printf("%.15s %.6s ", graph_dotted_line, graph_dotted_line);
1964
a407b067
DA		 1965 if (sched->show_cpu_visual)
1966 printf(" %.*s ", ncpus, graph_dotted_line);
1967
0e6758e8 1968 printf(" %.*s %.9s %.9s %.9s", comm_width,
49394a2a
DA		 1969 graph_dotted_line, graph_dotted_line, graph_dotted_line,
1970 graph_dotted_line);
1971
414e050c
NK		 1972 if (sched->show_state)
1973 printf(" %.5s", graph_dotted_line);
1974
49394a2a
DA		 1975 printf("\n");
1976}
1977
414e050c
NK		 1978static char task_state_char(struct thread *thread, int state)
1979{
1980 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
1981 unsigned bit = state ? ffs(state) : 0;
1982
1983 /* 'I' for idle */
1984 if (thread->tid == 0)
1985 return 'I';
1986
1987 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
1988}
1989
fc1469f1 1990static void timehist_print_sample(struct perf_sched *sched,
292c4a8f 1991 struct perf_evsel *evsel,
fc1469f1 1992 struct perf_sample *sample,
6c973c90 1993 struct addr_location *al,
853b7407 1994 struct thread *thread,
414e050c 1995 u64 t, int state)
49394a2a
DA		 1996{
1997 struct thread_runtime *tr = thread__priv(thread);
292c4a8f
BG		 1998 const char *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
1999 const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
a407b067 2000 u32 max_cpus = sched->max_cpu + 1;
49394a2a 2001 char tstr[64];
292c4a8f 2002 char nstr[30];
941bdea7 2003 u64 wait_time;
49394a2a 2004
853b7407 2005 timestamp__scnprintf_usec(t, tstr, sizeof(tstr));
49394a2a
DA		 2006 printf("%15s [%04d] ", tstr, sample->cpu);
2007
a407b067
DA		 2008 if (sched->show_cpu_visual) {
2009 u32 i;
2010 char c;
2011
2012 printf(" ");
2013 for (i = 0; i < max_cpus; ++i) {
2014 /* flag idle times with 'i'; others are sched events */
2015 if (i == sample->cpu)
2016 c = (thread->tid == 0) ? 'i' : 's';
2017 else
2018 c = ' ';
2019 printf("%c", c);
2020 }
2021 printf(" ");
2022 }
2023
49394a2a
DA		 2024 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2025
941bdea7
NK		 2026 wait_time = tr->dt_sleep + tr->dt_iowait + tr->dt_preempt;
2027 print_sched_time(wait_time, 6);
2028
49394a2a
DA		 2029 print_sched_time(tr->dt_delay, 6);
2030 print_sched_time(tr->dt_run, 6);
fc1469f1 2031
414e050c
NK		 2032 if (sched->show_state)
2033 printf(" %5c ", task_state_char(thread, state));
2034
292c4a8f
BG		 2035 if (sched->show_next) {
2036 snprintf(nstr, sizeof(nstr), "next: %s[%d]", next_comm, next_pid);
2037 printf(" %-*s", comm_width, nstr);
2038 }
2039
2040 if (sched->show_wakeups && !sched->show_next)
fc1469f1
DA		 2041 printf(" %-*s", comm_width, "");
2042
6c973c90
DA		 2043 if (thread->tid == 0)
2044 goto out;
2045
2046 if (sched->show_callchain)
2047 printf(" ");
2048
2049 sample__fprintf_sym(sample, al, 0,
2050 EVSEL__PRINT_SYM | EVSEL__PRINT_ONELINE |
2d9bbf6e
NK		 2051 EVSEL__PRINT_CALLCHAIN_ARROW |
2052 EVSEL__PRINT_SKIP_IGNORED,
6c973c90
DA		 2053 &callchain_cursor, stdout);
2054
2055out:
49394a2a
DA		 2056 printf("\n");
2057}
2058
2059/*
2060 * Explanation of delta-time stats:
2061 *
2062 * t = time of current schedule out event
2063 * tprev = time of previous sched out event
2064 * also time of schedule-in event for current task
2065 * last_time = time of last sched change event for current task
2066 * (i.e, time process was last scheduled out)
2067 * ready_to_run = time of wakeup for current task
2068 *
2069 * -----|------------|------------|------------|------
2070 * last ready tprev t
2071 * time to run
2072 *
2073 * |-------- dt_wait --------|
2074 * |- dt_delay -|-- dt_run --|
2075 *
2076 * dt_run = run time of current task
2077 * dt_wait = time between last schedule out event for task and tprev
2078 * represents time spent off the cpu
2079 * dt_delay = time between wakeup and schedule-in of task
2080 */
2081
2082static void timehist_update_runtime_stats(struct thread_runtime *r,
2083 u64 t, u64 tprev)
2084{
2085 r->dt_delay = 0;
941bdea7
NK		 2086 r->dt_sleep = 0;
2087 r->dt_iowait = 0;
2088 r->dt_preempt = 0;
49394a2a 2089 r->dt_run = 0;
941bdea7 2090
49394a2a
DA		 2091 if (tprev) {
2092 r->dt_run = t - tprev;
2093 if (r->ready_to_run) {
2094 if (r->ready_to_run > tprev)
2095 pr_debug("time travel: wakeup time for task > previous sched_switch event\n");
2096 else
2097 r->dt_delay = tprev - r->ready_to_run;
2098 }
2099
2100 if (r->last_time > tprev)
2101 pr_debug("time travel: last sched out time for task > previous sched_switch event\n");
941bdea7
NK		 2102 else if (r->last_time) {
2103 u64 dt_wait = tprev - r->last_time;
2104
2105 if (r->last_state == TASK_RUNNING)
2106 r->dt_preempt = dt_wait;
2107 else if (r->last_state == TASK_UNINTERRUPTIBLE)
2108 r->dt_iowait = dt_wait;
2109 else
2110 r->dt_sleep = dt_wait;
2111 }
49394a2a
DA		 2112 }
2113
2114 update_stats(&r->run_stats, r->dt_run);
587782c5
NK		 2115
2116 r->total_run_time += r->dt_run;
2117 r->total_delay_time += r->dt_delay;
2118 r->total_sleep_time += r->dt_sleep;
2119 r->total_iowait_time += r->dt_iowait;
2120 r->total_preempt_time += r->dt_preempt;
49394a2a
DA		 2121}
2122
96039c7c
NK		 2123static bool is_idle_sample(struct perf_sample *sample,
2124 struct perf_evsel *evsel)
49394a2a
DA		 2125{
2126 /* pid 0 == swapper == idle task */
96039c7c
NK		 2127 if (strcmp(perf_evsel__name(evsel), "sched:sched_switch") == 0)
2128 return perf_evsel__intval(evsel, sample, "prev_pid") == 0;
49394a2a 2129
96039c7c
NK		 2130 return sample->pid == 0;
2131}
2132
2133static void save_task_callchain(struct perf_sched *sched,
2134 struct perf_sample *sample,
2135 struct perf_evsel *evsel,
2136 struct machine *machine)
2137{
2138 struct callchain_cursor *cursor = &callchain_cursor;
2139 struct thread *thread;
6c973c90
DA		 2140
2141 /* want main thread for process - has maps */
2142 thread = machine__findnew_thread(machine, sample->pid, sample->pid);
2143 if (thread == NULL) {
2144 pr_debug("Failed to get thread for pid %d.\n", sample->pid);
96039c7c 2145 return;
6c973c90
DA		 2146 }
2147
4c50563d 2148 if (!sched->show_callchain || sample->callchain == NULL)
96039c7c 2149 return;
6c973c90
DA		 2150
2151 if (thread__resolve_callchain(thread, cursor, evsel, sample,
8388deb3 2152 NULL, NULL, sched->max_stack + 2) != 0) {
bb963e16 2153 if (verbose > 0)
62d94b00 2154 pr_err("Failed to resolve callchain. Skipping\n");
6c973c90 2155
96039c7c 2156 return;
6c973c90 2157 }
cdeb01bf 2158
6c973c90 2159 callchain_cursor_commit(cursor);
cdeb01bf
NK		 2160
2161 while (true) {
2162 struct callchain_cursor_node *node;
2163 struct symbol *sym;
2164
2165 node = callchain_cursor_current(cursor);
2166 if (node == NULL)
2167 break;
2168
2169 sym = node->sym;
a7c3899c 2170 if (sym) {
cdeb01bf
NK		 2171 if (!strcmp(sym->name, "schedule") ||
2172 !strcmp(sym->name, "__schedule") ||
2173 !strcmp(sym->name, "preempt_schedule"))
2174 sym->ignore = 1;
2175 }
2176
2177 callchain_cursor_advance(cursor);
2178 }
49394a2a
DA		 2179}
2180
3bc2fa9c
NK		 2181static int init_idle_thread(struct thread *thread)
2182{
2183 struct idle_thread_runtime *itr;
2184
2185 thread__set_comm(thread, idle_comm, 0);
2186
2187 itr = zalloc(sizeof(*itr));
2188 if (itr == NULL)
2189 return -ENOMEM;
2190
2191 init_stats(&itr->tr.run_stats);
2192 callchain_init(&itr->callchain);
2193 callchain_cursor_reset(&itr->cursor);
2194 thread__set_priv(thread, itr);
2195
2196 return 0;
2197}
2198
49394a2a
DA		 2199/*
2200 * Track idle stats per cpu by maintaining a local thread
2201 * struct for the idle task on each cpu.
2202 */
2203static int init_idle_threads(int ncpu)
2204{
3bc2fa9c 2205 int i, ret;
49394a2a
DA		 2206
2207 idle_threads = zalloc(ncpu * sizeof(struct thread *));
2208 if (!idle_threads)
2209 return -ENOMEM;
2210
b336352b 2211 idle_max_cpu = ncpu;
49394a2a
DA		 2212
2213 /* allocate the actual thread struct if needed */
2214 for (i = 0; i < ncpu; ++i) {
2215 idle_threads[i] = thread__new(0, 0);
2216 if (idle_threads[i] == NULL)
2217 return -ENOMEM;
2218
3bc2fa9c
NK		 2219 ret = init_idle_thread(idle_threads[i]);
2220 if (ret < 0)
2221 return ret;
49394a2a
DA		 2222 }
2223
2224 return 0;
2225}
2226
2227static void free_idle_threads(void)
2228{
2229 int i;
2230
2231 if (idle_threads == NULL)
2232 return;
2233
b336352b 2234 for (i = 0; i < idle_max_cpu; ++i) {
49394a2a
DA		 2235 if ((idle_threads[i]))
2236 thread__delete(idle_threads[i]);
2237 }
2238
2239 free(idle_threads);
2240}
2241
2242static struct thread *get_idle_thread(int cpu)
2243{
2244 /*
2245 * expand/allocate array of pointers to local thread
2246 * structs if needed
2247 */
2248 if ((cpu >= idle_max_cpu) || (idle_threads == NULL)) {
2249 int i, j = __roundup_pow_of_two(cpu+1);
2250 void *p;
2251
2252 p = realloc(idle_threads, j * sizeof(struct thread *));
2253 if (!p)
2254 return NULL;
2255
2256 idle_threads = (struct thread **) p;
b336352b 2257 for (i = idle_max_cpu; i < j; ++i)
49394a2a
DA		 2258 idle_threads[i] = NULL;
2259
2260 idle_max_cpu = j;
2261 }
2262
2263 /* allocate a new thread struct if needed */
2264 if (idle_threads[cpu] == NULL) {
2265 idle_threads[cpu] = thread__new(0, 0);
2266
2267 if (idle_threads[cpu]) {
3bc2fa9c
NK		 2268 if (init_idle_thread(idle_threads[cpu]) < 0)
2269 return NULL;
49394a2a
DA		 2270 }
2271 }
2272
2273 return idle_threads[cpu];
2274}
2275
4c50563d
ACM		 2276static void save_idle_callchain(struct perf_sched *sched,
2277 struct idle_thread_runtime *itr,
699b5b92
NK		 2278 struct perf_sample *sample)
2279{
4c50563d 2280 if (!sched->show_callchain || sample->callchain == NULL)
699b5b92
NK		 2281 return;
2282
2283 callchain_cursor__copy(&itr->cursor, &callchain_cursor);
2284}
2285
6c973c90
DA		 2286static struct thread *timehist_get_thread(struct perf_sched *sched,
2287 struct perf_sample *sample,
49394a2a
DA		 2288 struct machine *machine,
2289 struct perf_evsel *evsel)
2290{
2291 struct thread *thread;
2292
96039c7c 2293 if (is_idle_sample(sample, evsel)) {
49394a2a
DA		 2294 thread = get_idle_thread(sample->cpu);
2295 if (thread == NULL)
2296 pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
2297
2298 } else {
5d92d96a
NK		 2299 /* there were samples with tid 0 but non-zero pid */
2300 thread = machine__findnew_thread(machine, sample->pid,
2301 sample->tid ?: sample->pid);
49394a2a
DA		 2302 if (thread == NULL) {
2303 pr_debug("Failed to get thread for tid %d. skipping sample.\n",
2304 sample->tid);
2305 }
96039c7c
NK		 2306
2307 save_task_callchain(sched, sample, evsel, machine);
699b5b92
NK		 2308 if (sched->idle_hist) {
2309 struct thread *idle;
2310 struct idle_thread_runtime *itr;
2311
2312 idle = get_idle_thread(sample->cpu);
2313 if (idle == NULL) {
2314 pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
2315 return NULL;
2316 }
2317
2318 itr = thread__priv(idle);
2319 if (itr == NULL)
2320 return NULL;
2321
2322 itr->last_thread = thread;
2323
2324 /* copy task callchain when entering to idle */
2325 if (perf_evsel__intval(evsel, sample, "next_pid") == 0)
4c50563d 2326 save_idle_callchain(sched, itr, sample);
699b5b92 2327 }
49394a2a
DA		 2328 }
2329
2330 return thread;
2331}
2332
52df138c 2333static bool timehist_skip_sample(struct perf_sched *sched,
a4b2b6f5
NK		 2334 struct thread *thread,
2335 struct perf_evsel *evsel,
2336 struct perf_sample *sample)
49394a2a
DA		 2337{
2338 bool rc = false;
2339
52df138c 2340 if (thread__is_filtered(thread)) {
49394a2a 2341 rc = true;
52df138c
DA		 2342 sched->skipped_samples++;
2343 }
49394a2a 2344
a4b2b6f5
NK		 2345 if (sched->idle_hist) {
2346 if (strcmp(perf_evsel__name(evsel), "sched:sched_switch"))
2347 rc = true;
2348 else if (perf_evsel__intval(evsel, sample, "prev_pid") != 0 &&
2349 perf_evsel__intval(evsel, sample, "next_pid") != 0)
2350 rc = true;
2351 }
2352
49394a2a
DA		 2353 return rc;
2354}
2355
fc1469f1 2356static void timehist_print_wakeup_event(struct perf_sched *sched,
a4b2b6f5 2357 struct perf_evsel *evsel,
fc1469f1
DA		 2358 struct perf_sample *sample,
2359 struct machine *machine,
2360 struct thread *awakened)
2361{
2362 struct thread *thread;
2363 char tstr[64];
2364
2365 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2366 if (thread == NULL)
2367 return;
2368
2369 /* show wakeup unless both awakee and awaker are filtered */
a4b2b6f5
NK		 2370 if (timehist_skip_sample(sched, thread, evsel, sample) &&
2371 timehist_skip_sample(sched, awakened, evsel, sample)) {
fc1469f1
DA		 2372 return;
2373 }
2374
2375 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2376 printf("%15s [%04d] ", tstr, sample->cpu);
a407b067
DA		 2377 if (sched->show_cpu_visual)
2378 printf(" %*s ", sched->max_cpu + 1, "");
fc1469f1
DA		 2379
2380 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2381
2382 /* dt spacer */
2383 printf(" %9s %9s %9s ", "", "", "");
2384
2385 printf("awakened: %s", timehist_get_commstr(awakened));
2386
2387 printf("\n");
2388}
2389
2390static int timehist_sched_wakeup_event(struct perf_tool *tool,
49394a2a
DA		 2391 union perf_event *event __maybe_unused,
2392 struct perf_evsel *evsel,
2393 struct perf_sample *sample,
2394 struct machine *machine)
2395{
fc1469f1 2396 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
49394a2a
DA		 2397 struct thread *thread;
2398 struct thread_runtime *tr = NULL;
2399 /* want pid of awakened task not pid in sample */
2400 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2401
2402 thread = machine__findnew_thread(machine, 0, pid);
2403 if (thread == NULL)
2404 return -1;
2405
2406 tr = thread__get_runtime(thread);
2407 if (tr == NULL)
2408 return -1;
2409
2410 if (tr->ready_to_run == 0)
2411 tr->ready_to_run = sample->time;
2412
fc1469f1 2413 /* show wakeups if requested */
853b7407
DA		 2414 if (sched->show_wakeups &&
2415 !perf_time__skip_sample(&sched->ptime, sample->time))
a4b2b6f5 2416 timehist_print_wakeup_event(sched, evsel, sample, machine, thread);
fc1469f1 2417
49394a2a
DA		 2418 return 0;
2419}
2420
350f54fa
DA		 2421static void timehist_print_migration_event(struct perf_sched *sched,
2422 struct perf_evsel *evsel,
2423 struct perf_sample *sample,
2424 struct machine *machine,
2425 struct thread *migrated)
2426{
2427 struct thread *thread;
2428 char tstr[64];
2429 u32 max_cpus = sched->max_cpu + 1;
2430 u32 ocpu, dcpu;
2431
2432 if (sched->summary_only)
2433 return;
2434
2435 max_cpus = sched->max_cpu + 1;
2436 ocpu = perf_evsel__intval(evsel, sample, "orig_cpu");
2437 dcpu = perf_evsel__intval(evsel, sample, "dest_cpu");
2438
2439 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2440 if (thread == NULL)
2441 return;
2442
a4b2b6f5
NK		 2443 if (timehist_skip_sample(sched, thread, evsel, sample) &&
2444 timehist_skip_sample(sched, migrated, evsel, sample)) {
350f54fa
DA		 2445 return;
2446 }
2447
2448 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2449 printf("%15s [%04d] ", tstr, sample->cpu);
2450
2451 if (sched->show_cpu_visual) {
2452 u32 i;
2453 char c;
2454
2455 printf(" ");
2456 for (i = 0; i < max_cpus; ++i) {
2457 c = (i == sample->cpu) ? 'm' : ' ';
2458 printf("%c", c);
2459 }
2460 printf(" ");
2461 }
2462
2463 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2464
2465 /* dt spacer */
2466 printf(" %9s %9s %9s ", "", "", "");
2467
2468 printf("migrated: %s", timehist_get_commstr(migrated));
2469 printf(" cpu %d => %d", ocpu, dcpu);
2470
2471 printf("\n");
2472}
2473
2474static int timehist_migrate_task_event(struct perf_tool *tool,
2475 union perf_event *event __maybe_unused,
2476 struct perf_evsel *evsel,
2477 struct perf_sample *sample,
2478 struct machine *machine)
2479{
2480 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2481 struct thread *thread;
2482 struct thread_runtime *tr = NULL;
2483 /* want pid of migrated task not pid in sample */
2484 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2485
2486 thread = machine__findnew_thread(machine, 0, pid);
2487 if (thread == NULL)
2488 return -1;
2489
2490 tr = thread__get_runtime(thread);
2491 if (tr == NULL)
2492 return -1;
2493
2494 tr->migrations++;
2495
2496 /* show migrations if requested */
2497 timehist_print_migration_event(sched, evsel, sample, machine, thread);
2498
2499 return 0;
2500}
2501
52df138c 2502static int timehist_sched_change_event(struct perf_tool *tool,
49394a2a
DA		 2503 union perf_event *event,
2504 struct perf_evsel *evsel,
2505 struct perf_sample *sample,
2506 struct machine *machine)
2507{
fc1469f1 2508 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
853b7407 2509 struct perf_time_interval *ptime = &sched->ptime;
49394a2a
DA		 2510 struct addr_location al;
2511 struct thread *thread;
2512 struct thread_runtime *tr = NULL;
853b7407 2513 u64 tprev, t = sample->time;
49394a2a 2514 int rc = 0;
414e050c
NK		 2515 int state = perf_evsel__intval(evsel, sample, "prev_state");
2516
49394a2a
DA		 2517
2518 if (machine__resolve(machine, &al, sample) < 0) {
2519 pr_err("problem processing %d event. skipping it\n",
2520 event->header.type);
2521 rc = -1;
2522 goto out;
2523 }
2524
6c973c90 2525 thread = timehist_get_thread(sched, sample, machine, evsel);
49394a2a
DA		 2526 if (thread == NULL) {
2527 rc = -1;
2528 goto out;
2529 }
2530
a4b2b6f5 2531 if (timehist_skip_sample(sched, thread, evsel, sample))
49394a2a
DA		 2532 goto out;
2533
2534 tr = thread__get_runtime(thread);
2535 if (tr == NULL) {
2536 rc = -1;
2537 goto out;
2538 }
2539
2540 tprev = perf_evsel__get_time(evsel, sample->cpu);
2541
853b7407
DA		 2542 /*
2543 * If start time given:
2544 * - sample time is under window user cares about - skip sample
2545 * - tprev is under window user cares about - reset to start of window
2546 */
2547 if (ptime->start && ptime->start > t)
2548 goto out;
2549
bdd75729 2550 if (tprev && ptime->start > tprev)
853b7407
DA		 2551 tprev = ptime->start;
2552
2553 /*
2554 * If end time given:
2555 * - previous sched event is out of window - we are done
2556 * - sample time is beyond window user cares about - reset it
2557 * to close out stats for time window interest
2558 */
2559 if (ptime->end) {
2560 if (tprev > ptime->end)
2561 goto out;
2562
2563 if (t > ptime->end)
2564 t = ptime->end;
2565 }
2566
07235f84
NK		 2567 if (!sched->idle_hist || thread->tid == 0) {
2568 timehist_update_runtime_stats(tr, t, tprev);
2569
2570 if (sched->idle_hist) {
2571 struct idle_thread_runtime *itr = (void *)tr;
2572 struct thread_runtime *last_tr;
2573
2574 BUG_ON(thread->tid != 0);
2575
2576 if (itr->last_thread == NULL)
2577 goto out;
2578
2579 /* add current idle time as last thread's runtime */
2580 last_tr = thread__get_runtime(itr->last_thread);
2581 if (last_tr == NULL)
2582 goto out;
2583
2584 timehist_update_runtime_stats(last_tr, t, tprev);
2585 /*
2586 * remove delta time of last thread as it's not updated
2587 * and otherwise it will show an invalid value next
2588 * time. we only care total run time and run stat.
2589 */
2590 last_tr->dt_run = 0;
07235f84 2591 last_tr->dt_delay = 0;
941bdea7
NK		 2592 last_tr->dt_sleep = 0;
2593 last_tr->dt_iowait = 0;
2594 last_tr->dt_preempt = 0;
07235f84 2595
ba957ebb
NK		 2596 if (itr->cursor.nr)
2597 callchain_append(&itr->callchain, &itr->cursor, t - tprev);
2598
07235f84
NK		 2599 itr->last_thread = NULL;
2600 }
2601 }
853b7407 2602
52df138c 2603 if (!sched->summary_only)
292c4a8f 2604 timehist_print_sample(sched, evsel, sample, &al, thread, t, state);
49394a2a
DA		 2605
2606out:
9396c9cb
NK		 2607 if (sched->hist_time.start == 0 && t >= ptime->start)
2608 sched->hist_time.start = t;
2609 if (ptime->end == 0 || t <= ptime->end)
2610 sched->hist_time.end = t;
2611
49394a2a
DA		 2612 if (tr) {
2613 /* time of this sched_switch event becomes last time task seen */
2614 tr->last_time = sample->time;
2615
941bdea7 2616 /* last state is used to determine where to account wait time */
414e050c 2617 tr->last_state = state;
941bdea7 2618
49394a2a
DA		 2619 /* sched out event for task so reset ready to run time */
2620 tr->ready_to_run = 0;
2621 }
2622
2623 perf_evsel__save_time(evsel, sample->time, sample->cpu);
2624
2625 return rc;
2626}
2627
2628static int timehist_sched_switch_event(struct perf_tool *tool,
2629 union perf_event *event,
2630 struct perf_evsel *evsel,
2631 struct perf_sample *sample,
2632 struct machine *machine __maybe_unused)
2633{
2634 return timehist_sched_change_event(tool, event, evsel, sample, machine);
2635}
2636
2637static int process_lost(struct perf_tool *tool __maybe_unused,
2638 union perf_event *event,
2639 struct perf_sample *sample,
2640 struct machine *machine __maybe_unused)
2641{
2642 char tstr[64];
2643
2644 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2645 printf("%15s ", tstr);
2646 printf("lost %" PRIu64 " events on cpu %d\n", event->lost.lost, sample->cpu);
2647
2648 return 0;
2649}
2650
2651
52df138c
DA		 2652static void print_thread_runtime(struct thread *t,
2653 struct thread_runtime *r)
2654{
2655 double mean = avg_stats(&r->run_stats);
2656 float stddev;
2657
2658 printf("%*s %5d %9" PRIu64 " ",
2659 comm_width, timehist_get_commstr(t), t->ppid,
2660 (u64) r->run_stats.n);
2661
2662 print_sched_time(r->total_run_time, 8);
2663 stddev = rel_stddev_stats(stddev_stats(&r->run_stats), mean);
2664 print_sched_time(r->run_stats.min, 6);
2665 printf(" ");
2666 print_sched_time((u64) mean, 6);
2667 printf(" ");
2668 print_sched_time(r->run_stats.max, 6);
2669 printf(" ");
2670 printf("%5.2f", stddev);
350f54fa 2671 printf(" %5" PRIu64, r->migrations);
52df138c
DA		 2672 printf("\n");
2673}
2674
587782c5
NK		 2675static void print_thread_waittime(struct thread *t,
2676 struct thread_runtime *r)
2677{
2678 printf("%*s %5d %9" PRIu64 " ",
2679 comm_width, timehist_get_commstr(t), t->ppid,
2680 (u64) r->run_stats.n);
2681
2682 print_sched_time(r->total_run_time, 8);
2683 print_sched_time(r->total_sleep_time, 6);
2684 printf(" ");
2685 print_sched_time(r->total_iowait_time, 6);
2686 printf(" ");
2687 print_sched_time(r->total_preempt_time, 6);
2688 printf(" ");
2689 print_sched_time(r->total_delay_time, 6);
2690 printf("\n");
2691}
2692
52df138c 2693struct total_run_stats {
587782c5 2694 struct perf_sched *sched;
52df138c
DA		 2695 u64 sched_count;
2696 u64 task_count;
2697 u64 total_run_time;
2698};
2699
2700static int __show_thread_runtime(struct thread *t, void *priv)
2701{
2702 struct total_run_stats *stats = priv;
2703 struct thread_runtime *r;
2704
2705 if (thread__is_filtered(t))
2706 return 0;
2707
2708 r = thread__priv(t);
2709 if (r && r->run_stats.n) {
2710 stats->task_count++;
2711 stats->sched_count += r->run_stats.n;
2712 stats->total_run_time += r->total_run_time;
587782c5
NK		 2713
2714 if (stats->sched->show_state)
2715 print_thread_waittime(t, r);
2716 else
2717 print_thread_runtime(t, r);
52df138c
DA		 2718 }
2719
2720 return 0;
2721}
2722
2723static int show_thread_runtime(struct thread *t, void *priv)
2724{
2725 if (t->dead)
2726 return 0;
2727
2728 return __show_thread_runtime(t, priv);
2729}
2730
2731static int show_deadthread_runtime(struct thread *t, void *priv)
2732{
2733 if (!t->dead)
2734 return 0;
2735
2736 return __show_thread_runtime(t, priv);
2737}
2738
ba957ebb
NK		 2739static size_t callchain__fprintf_folded(FILE *fp, struct callchain_node *node)
2740{
2741 const char *sep = " <- ";
2742 struct callchain_list *chain;
2743 size_t ret = 0;
2744 char bf[1024];
2745 bool first;
2746
2747 if (node == NULL)
2748 return 0;
2749
2750 ret = callchain__fprintf_folded(fp, node->parent);
2751 first = (ret == 0);
2752
2753 list_for_each_entry(chain, &node->val, list) {
2754 if (chain->ip >= PERF_CONTEXT_MAX)
2755 continue;
2756 if (chain->ms.sym && chain->ms.sym->ignore)
2757 continue;
2758 ret += fprintf(fp, "%s%s", first ? "" : sep,
2759 callchain_list__sym_name(chain, bf, sizeof(bf),
2760 false));
2761 first = false;
2762 }
2763
2764 return ret;
2765}
2766
cb4c13a5 2767static size_t timehist_print_idlehist_callchain(struct rb_root_cached *root)
ba957ebb
NK		 2768{
2769 size_t ret = 0;
2770 FILE *fp = stdout;
2771 struct callchain_node *chain;
cb4c13a5 2772 struct rb_node *rb_node = rb_first_cached(root);
ba957ebb
NK		 2773
2774 printf(" %16s %8s %s\n", "Idle time (msec)", "Count", "Callchains");
2775 printf(" %.16s %.8s %.50s\n", graph_dotted_line, graph_dotted_line,
2776 graph_dotted_line);
2777
2778 while (rb_node) {
2779 chain = rb_entry(rb_node, struct callchain_node, rb_node);
2780 rb_node = rb_next(rb_node);
2781
2782 ret += fprintf(fp, " ");
2783 print_sched_time(chain->hit, 12);
2784 ret += 16; /* print_sched_time returns 2nd arg + 4 */
2785 ret += fprintf(fp, " %8d ", chain->count);
2786 ret += callchain__fprintf_folded(fp, chain);
2787 ret += fprintf(fp, "\n");
2788 }
2789
2790 return ret;
2791}
2792
52df138c
DA		 2793static void timehist_print_summary(struct perf_sched *sched,
2794 struct perf_session *session)
2795{
2796 struct machine *m = &session->machines.host;
2797 struct total_run_stats totals;
2798 u64 task_count;
2799 struct thread *t;
2800 struct thread_runtime *r;
2801 int i;
9396c9cb 2802 u64 hist_time = sched->hist_time.end - sched->hist_time.start;
52df138c
DA		 2803
2804 memset(&totals, 0, sizeof(totals));
587782c5 2805 totals.sched = sched;
52df138c 2806
07235f84
NK		 2807 if (sched->idle_hist) {
2808 printf("\nIdle-time summary\n");
2809 printf("%*s parent sched-out ", comm_width, "comm");
2810 printf(" idle-time min-idle avg-idle max-idle stddev migrations\n");
587782c5
NK		 2811 } else if (sched->show_state) {
2812 printf("\nWait-time summary\n");
2813 printf("%*s parent sched-in ", comm_width, "comm");
2814 printf(" run-time sleep iowait preempt delay\n");
07235f84
NK		 2815 } else {
2816 printf("\nRuntime summary\n");
2817 printf("%*s parent sched-in ", comm_width, "comm");
2818 printf(" run-time min-run avg-run max-run stddev migrations\n");
2819 }
52df138c 2820 printf("%*s (count) ", comm_width, "");
587782c5
NK		 2821 printf(" (msec) (msec) (msec) (msec) %s\n",
2822 sched->show_state ? "(msec)" : "%");
350f54fa 2823 printf("%.117s\n", graph_dotted_line);
52df138c
DA		 2824
2825 machine__for_each_thread(m, show_thread_runtime, &totals);
2826 task_count = totals.task_count;
2827 if (!task_count)
2828 printf("<no still running tasks>\n");
2829
2830 printf("\nTerminated tasks:\n");
2831 machine__for_each_thread(m, show_deadthread_runtime, &totals);
2832 if (task_count == totals.task_count)
2833 printf("<no terminated tasks>\n");
2834
2835 /* CPU idle stats not tracked when samples were skipped */
07235f84 2836 if (sched->skipped_samples && !sched->idle_hist)
52df138c
DA		 2837 return;
2838
2839 printf("\nIdle stats:\n");
b336352b 2840 for (i = 0; i < idle_max_cpu; ++i) {
52df138c
DA		 2841 t = idle_threads[i];
2842 if (!t)
2843 continue;
2844
2845 r = thread__priv(t);
2846 if (r && r->run_stats.n) {
2847 totals.sched_count += r->run_stats.n;
2848 printf(" CPU %2d idle for ", i);
2849 print_sched_time(r->total_run_time, 6);
9396c9cb 2850 printf(" msec (%6.2f%%)\n", 100.0 * r->total_run_time / hist_time);
52df138c
DA		 2851 } else
2852 printf(" CPU %2d idle entire time window\n", i);
2853 }
2854
4c50563d 2855 if (sched->idle_hist && sched->show_callchain) {
ba957ebb
NK		 2856 callchain_param.mode = CHAIN_FOLDED;
2857 callchain_param.value = CCVAL_PERIOD;
2858
2859 callchain_register_param(&callchain_param);
2860
2861 printf("\nIdle stats by callchain:\n");
2862 for (i = 0; i < idle_max_cpu; ++i) {
2863 struct idle_thread_runtime *itr;
2864
2865 t = idle_threads[i];
2866 if (!t)
2867 continue;
2868
2869 itr = thread__priv(t);
2870 if (itr == NULL)
2871 continue;
2872
cb4c13a5 2873 callchain_param.sort(&itr->sorted_root.rb_root, &itr->callchain,
ba957ebb
NK		 2874 0, &callchain_param);
2875
2876 printf(" CPU %2d:", i);
2877 print_sched_time(itr->tr.total_run_time, 6);
2878 printf(" msec\n");
2879 timehist_print_idlehist_callchain(&itr->sorted_root);
2880 printf("\n");
2881 }
2882 }
2883
52df138c
DA		 2884 printf("\n"
2885 " Total number of unique tasks: %" PRIu64 "\n"
9396c9cb 2886 "Total number of context switches: %" PRIu64 "\n",
52df138c
DA		 2887 totals.task_count, totals.sched_count);
2888
9396c9cb 2889 printf(" Total run time (msec): ");
52df138c
DA		 2890 print_sched_time(totals.total_run_time, 2);
2891 printf("\n");
9396c9cb
NK		 2892
2893 printf(" Total scheduling time (msec): ");
2894 print_sched_time(hist_time, 2);
2895 printf(" (x %d)\n", sched->max_cpu);
52df138c
DA		 2896}
2897
49394a2a
DA		 2898typedef int (*sched_handler)(struct perf_tool *tool,
2899 union perf_event *event,
2900 struct perf_evsel *evsel,
2901 struct perf_sample *sample,
2902 struct machine *machine);
2903
2904static int perf_timehist__process_sample(struct perf_tool *tool,
2905 union perf_event *event,
2906 struct perf_sample *sample,
2907 struct perf_evsel *evsel,
2908 struct machine *machine)
2909{
2910 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2911 int err = 0;
2912 int this_cpu = sample->cpu;
2913
2914 if (this_cpu > sched->max_cpu)
2915 sched->max_cpu = this_cpu;
2916
2917 if (evsel->handler != NULL) {
2918 sched_handler f = evsel->handler;
2919
2920 err = f(tool, event, evsel, sample, machine);
2921 }
2922
2923 return err;
2924}
2925
6c973c90
DA		 2926static int timehist_check_attr(struct perf_sched *sched,
2927 struct perf_evlist *evlist)
2928{
2929 struct perf_evsel *evsel;
2930 struct evsel_runtime *er;
2931
2932 list_for_each_entry(evsel, &evlist->entries, node) {
2933 er = perf_evsel__get_runtime(evsel);
2934 if (er == NULL) {
2935 pr_err("Failed to allocate memory for evsel runtime data\n");
2936 return -1;
2937 }
2938
27de9b2b 2939 if (sched->show_callchain && !evsel__has_callchain(evsel)) {
6c973c90
DA		 2940 pr_info("Samples do not have callchains.\n");
2941 sched->show_callchain = 0;
2942 symbol_conf.use_callchain = 0;
2943 }
2944 }
2945
2946 return 0;
2947}
2948
49394a2a
DA		 2949static int perf_sched__timehist(struct perf_sched *sched)
2950{
2951 const struct perf_evsel_str_handler handlers[] = {
2952 { "sched:sched_switch", timehist_sched_switch_event, },
2953 { "sched:sched_wakeup", timehist_sched_wakeup_event, },
2954 { "sched:sched_wakeup_new", timehist_sched_wakeup_event, },
2955 };
350f54fa
DA		 2956 const struct perf_evsel_str_handler migrate_handlers[] = {
2957 { "sched:sched_migrate_task", timehist_migrate_task_event, },
2958 };
8ceb41d7 2959 struct perf_data data = {
2d4f2799
JO		 2960 .path = input_name,
2961 .mode = PERF_DATA_MODE_READ,
2962 .force = sched->force,
49394a2a
DA		 2963 };
2964
2965 struct perf_session *session;
52df138c 2966 struct perf_evlist *evlist;
49394a2a
DA		 2967 int err = -1;
2968
2969 /*
2970 * event handlers for timehist option
2971 */
2972 sched->tool.sample = perf_timehist__process_sample;
2973 sched->tool.mmap = perf_event__process_mmap;
2974 sched->tool.comm = perf_event__process_comm;
2975 sched->tool.exit = perf_event__process_exit;
2976 sched->tool.fork = perf_event__process_fork;
2977 sched->tool.lost = process_lost;
2978 sched->tool.attr = perf_event__process_attr;
2979 sched->tool.tracing_data = perf_event__process_tracing_data;
2980 sched->tool.build_id = perf_event__process_build_id;
2981
2982 sched->tool.ordered_events = true;
2983 sched->tool.ordering_requires_timestamps = true;
2984
6c973c90
DA		 2985 symbol_conf.use_callchain = sched->show_callchain;
2986
8ceb41d7 2987 session = perf_session__new(&data, false, &sched->tool);
49394a2a
DA		 2988 if (session == NULL)
2989 return -ENOMEM;
2990
52df138c
DA		 2991 evlist = session->evlist;
2992
49394a2a
DA		 2993 symbol__init(&session->header.env);
2994
853b7407
DA		 2995 if (perf_time__parse_str(&sched->ptime, sched->time_str) != 0) {
2996 pr_err("Invalid time string\n");
2997 return -EINVAL;
2998 }
2999
6c973c90
DA		 3000 if (timehist_check_attr(sched, evlist) != 0)
3001 goto out;
3002
49394a2a
DA		 3003 setup_pager();
3004
3005 /* setup per-evsel handlers */
3006 if (perf_session__set_tracepoints_handlers(session, handlers))
3007 goto out;
3008
f45bf8d3
DA		 3009 /* sched_switch event at a minimum needs to exist */
3010 if (!perf_evlist__find_tracepoint_by_name(session->evlist,
3011 "sched:sched_switch")) {
3012 pr_err("No sched_switch events found. Have you run 'perf sched record'?\n");
49394a2a 3013 goto out;
f45bf8d3 3014 }
49394a2a 3015
350f54fa
DA		 3016 if (sched->show_migrations &&
3017 perf_session__set_tracepoints_handlers(session, migrate_handlers))
3018 goto out;
3019
49394a2a
DA		 3020 /* pre-allocate struct for per-CPU idle stats */
3021 sched->max_cpu = session->header.env.nr_cpus_online;
3022 if (sched->max_cpu == 0)
3023 sched->max_cpu = 4;
3024 if (init_idle_threads(sched->max_cpu))
3025 goto out;
3026
52df138c
DA		 3027 /* summary_only implies summary option, but don't overwrite summary if set */
3028 if (sched->summary_only)
3029 sched->summary = sched->summary_only;
3030
3031 if (!sched->summary_only)
a407b067 3032 timehist_header(sched);
49394a2a
DA		 3033
3034 err = perf_session__process_events(session);
3035 if (err) {
3036 pr_err("Failed to process events, error %d", err);
3037 goto out;
3038 }
3039
52df138c
DA		 3040 sched->nr_events = evlist->stats.nr_events[0];
3041 sched->nr_lost_events = evlist->stats.total_lost;
3042 sched->nr_lost_chunks = evlist->stats.nr_events[PERF_RECORD_LOST];
3043
3044 if (sched->summary)
3045 timehist_print_summary(sched, session);
3046
49394a2a
DA		 3047out:
3048 free_idle_threads();
3049 perf_session__delete(session);
3050
3051 return err;
3052}
3053
3054
0e9b07e5 3055static void print_bad_events(struct perf_sched *sched)
0ec04e16 3056{
0e9b07e5 3057 if (sched->nr_unordered_timestamps && sched->nr_timestamps) {
0ec04e16 3058 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
0e9b07e5
ACM		 3059 (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0,
3060 sched->nr_unordered_timestamps, sched->nr_timestamps);
0ec04e16 3061 }
0e9b07e5 3062 if (sched->nr_lost_events && sched->nr_events) {
0ec04e16 3063 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
0e9b07e5
ACM		 3064 (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
3065 sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
0ec04e16 3066 }
0e9b07e5 3067 if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
0ec04e16 3068 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
0e9b07e5
ACM		 3069 (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
3070 sched->nr_context_switch_bugs, sched->nr_timestamps);
3071 if (sched->nr_lost_events)
0ec04e16
IM		 3072 printf(" (due to lost events?)");
3073 printf("\n");
3074 }
3075}
3076
cb4c13a5 3077static void __merge_work_atoms(struct rb_root_cached *root, struct work_atoms *data)
2f80dd44 3078{
cb4c13a5 3079 struct rb_node **new = &(root->rb_root.rb_node), *parent = NULL;
2f80dd44
JB		 3080 struct work_atoms *this;
3081 const char *comm = thread__comm_str(data->thread), *this_comm;
cb4c13a5 3082 bool leftmost = true;
2f80dd44
JB		 3083
3084 while (*new) {
3085 int cmp;
3086
3087 this = container_of(*new, struct work_atoms, node);
3088 parent = *new;
3089
3090 this_comm = thread__comm_str(this->thread);
3091 cmp = strcmp(comm, this_comm);
3092 if (cmp > 0) {
3093 new = &((*new)->rb_left);
3094 } else if (cmp < 0) {
3095 new = &((*new)->rb_right);
cb4c13a5 3096 leftmost = false;
2f80dd44
JB		 3097 } else {
3098 this->num_merged++;
3099 this->total_runtime += data->total_runtime;
3100 this->nb_atoms += data->nb_atoms;
3101 this->total_lat += data->total_lat;
3102 list_splice(&data->work_list, &this->work_list);
3103 if (this->max_lat < data->max_lat) {
3104 this->max_lat = data->max_lat;
3105 this->max_lat_at = data->max_lat_at;
3106 }
3107 zfree(&data);
3108 return;
3109 }
3110 }
3111
3112 data->num_merged++;
3113 rb_link_node(&data->node, parent, new);
cb4c13a5 3114 rb_insert_color_cached(&data->node, root, leftmost);
2f80dd44
JB		 3115}
3116
3117static void perf_sched__merge_lat(struct perf_sched *sched)
3118{
3119 struct work_atoms *data;
3120 struct rb_node *node;
3121
3122 if (sched->skip_merge)
3123 return;
3124
cb4c13a5
DB		 3125 while ((node = rb_first_cached(&sched->atom_root))) {
3126 rb_erase_cached(node, &sched->atom_root);
2f80dd44
JB		 3127 data = rb_entry(node, struct work_atoms, node);
3128 __merge_work_atoms(&sched->merged_atom_root, data);
3129 }
3130}
3131
0e9b07e5 3132static int perf_sched__lat(struct perf_sched *sched)
0ec04e16
IM		 3133{
3134 struct rb_node *next;
3135
3136 setup_pager();
ad9def7c 3137
ae536acf 3138 if (perf_sched__read_events(sched))
a116e05d 3139 return -1;
ad9def7c 3140
2f80dd44 3141 perf_sched__merge_lat(sched);
0e9b07e5 3142 perf_sched__sort_lat(sched);
0ec04e16 3143
80790e0b
RR		 3144 printf("\n -----------------------------------------------------------------------------------------------------------------\n");
3145 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
3146 printf(" -----------------------------------------------------------------------------------------------------------------\n");
0ec04e16 3147
cb4c13a5 3148 next = rb_first_cached(&sched->sorted_atom_root);
0ec04e16
IM		 3149
3150 while (next) {
3151 struct work_atoms *work_list;
3152
3153 work_list = rb_entry(next, struct work_atoms, node);
0e9b07e5 3154 output_lat_thread(sched, work_list);
0ec04e16 3155 next = rb_next(next);
ae536acf 3156 thread__zput(work_list->thread);
0ec04e16
IM		 3157 }
3158
80790e0b 3159 printf(" -----------------------------------------------------------------------------------------------------------------\n");
9486aa38 3160 printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n",
4fc76e49 3161 (double)sched->all_runtime / NSEC_PER_MSEC, sched->all_count);
0ec04e16
IM		 3162
3163 printf(" ---------------------------------------------------\n");
3164
0e9b07e5 3165 print_bad_events(sched);
0ec04e16
IM		 3166 printf("\n");
3167
a116e05d 3168 return 0;
0ec04e16
IM		 3169}
3170
99623c62
JO		 3171static int setup_map_cpus(struct perf_sched *sched)
3172{
73643bb6
JO		 3173 struct cpu_map *map;
3174
99623c62
JO		 3175 sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
3176
3177 if (sched->map.comp) {
3178 sched->map.comp_cpus = zalloc(sched->max_cpu * sizeof(int));
cf294f24
JO		 3179 if (!sched->map.comp_cpus)
3180 return -1;
99623c62
JO		 3181 }
3182
73643bb6
JO		 3183 if (!sched->map.cpus_str)
3184 return 0;
3185
3186 map = cpu_map__new(sched->map.cpus_str);
3187 if (!map) {
3188 pr_err("failed to get cpus map from %s\n", sched->map.cpus_str);
3189 return -1;
3190 }
3191
3192 sched->map.cpus = map;
99623c62
JO		 3193 return 0;
3194}
3195
a151a37a
JO		 3196static int setup_color_pids(struct perf_sched *sched)
3197{
3198 struct thread_map *map;
3199
3200 if (!sched->map.color_pids_str)
3201 return 0;
3202
3203 map = thread_map__new_by_tid_str(sched->map.color_pids_str);
3204 if (!map) {
3205 pr_err("failed to get thread map from %s\n", sched->map.color_pids_str);
3206 return -1;
3207 }
3208
3209 sched->map.color_pids = map;
3210 return 0;
3211}
3212
cf294f24
JO		 3213static int setup_color_cpus(struct perf_sched *sched)
3214{
3215 struct cpu_map *map;
3216
3217 if (!sched->map.color_cpus_str)
3218 return 0;
3219
3220 map = cpu_map__new(sched->map.color_cpus_str);
3221 if (!map) {
3222 pr_err("failed to get thread map from %s\n", sched->map.color_cpus_str);
3223 return -1;
3224 }
3225
3226 sched->map.color_cpus = map;
3227 return 0;
3228}
3229
0e9b07e5 3230static int perf_sched__map(struct perf_sched *sched)
0ec04e16 3231{
99623c62
JO		 3232 if (setup_map_cpus(sched))
3233 return -1;
40749d0f 3234
a151a37a
JO		 3235 if (setup_color_pids(sched))
3236 return -1;
3237
cf294f24
JO		 3238 if (setup_color_cpus(sched))
3239 return -1;
3240
0ec04e16 3241 setup_pager();
ae536acf 3242 if (perf_sched__read_events(sched))
a116e05d 3243 return -1;
0e9b07e5 3244 print_bad_events(sched);
a116e05d 3245 return 0;
0ec04e16
IM		 3246}
3247
0e9b07e5 3248static int perf_sched__replay(struct perf_sched *sched)
0ec04e16
IM		 3249{
3250 unsigned long i;
3251
0e9b07e5
ACM		 3252 calibrate_run_measurement_overhead(sched);
3253 calibrate_sleep_measurement_overhead(sched);
0ec04e16 3254
0e9b07e5 3255 test_calibrations(sched);
0ec04e16 3256
ae536acf 3257 if (perf_sched__read_events(sched))
a116e05d 3258 return -1;
0ec04e16 3259
0e9b07e5
ACM		 3260 printf("nr_run_events: %ld\n", sched->nr_run_events);
3261 printf("nr_sleep_events: %ld\n", sched->nr_sleep_events);
3262 printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events);
0ec04e16 3263
0e9b07e5
ACM		 3264 if (sched->targetless_wakeups)
3265 printf("target-less wakeups: %ld\n", sched->targetless_wakeups);
3266 if (sched->multitarget_wakeups)
3267 printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups);
3268 if (sched->nr_run_events_optimized)
0ec04e16 3269 printf("run atoms optimized: %ld\n",
0e9b07e5 3270 sched->nr_run_events_optimized);
0ec04e16 3271
0e9b07e5
ACM		 3272 print_task_traces(sched);
3273 add_cross_task_wakeups(sched);
0ec04e16 3274
0e9b07e5 3275 create_tasks(sched);
0ec04e16 3276 printf("------------------------------------------------------------\n");
0e9b07e5
ACM		 3277 for (i = 0; i < sched->replay_repeat; i++)
3278 run_one_test(sched);
a116e05d
ACM		 3279
3280 return 0;
0ec04e16
IM		 3281}
3282
0e9b07e5
ACM		 3283static void setup_sorting(struct perf_sched *sched, const struct option *options,
3284 const char * const usage_msg[])
daa1d7a5 3285{
0e9b07e5 3286 char *tmp, *tok, *str = strdup(sched->sort_order);
daa1d7a5
FW		 3287
3288 for (tok = strtok_r(str, ", ", &tmp);
3289 tok; tok = strtok_r(NULL, ", ", &tmp)) {
0e9b07e5 3290 if (sort_dimension__add(tok, &sched->sort_list) < 0) {
c7118369
NK		 3291 usage_with_options_msg(usage_msg, options,
3292 "Unknown --sort key: `%s'", tok);
daa1d7a5
FW		 3293 }
3294 }
3295
3296 free(str);
3297
0e9b07e5 3298 sort_dimension__add("pid", &sched->cmp_pid);
daa1d7a5
FW		 3299}
3300
1fc35b29
IM		 3301static int __cmd_record(int argc, const char **argv)
3302{
3303 unsigned int rec_argc, i, j;
3304 const char **rec_argv;
0e9b07e5
ACM		 3305 const char * const record_args[] = {
3306 "record",
3307 "-a",
3308 "-R",
0e9b07e5
ACM		 3309 "-m", "1024",
3310 "-c", "1",
3311 "-e", "sched:sched_switch",
3312 "-e", "sched:sched_stat_wait",
3313 "-e", "sched:sched_stat_sleep",
3314 "-e", "sched:sched_stat_iowait",
3315 "-e", "sched:sched_stat_runtime",
0e9b07e5
ACM		 3316 "-e", "sched:sched_process_fork",
3317 "-e", "sched:sched_wakeup",
7fff9597 3318 "-e", "sched:sched_wakeup_new",
0e9b07e5
ACM		 3319 "-e", "sched:sched_migrate_task",
3320 };
1fc35b29
IM		 3321
3322 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
3323 rec_argv = calloc(rec_argc + 1, sizeof(char *));
3324
e462dc55 3325 if (rec_argv == NULL)
ce47dc56
CS		 3326 return -ENOMEM;
3327
1fc35b29
IM		 3328 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3329 rec_argv[i] = strdup(record_args[i]);
3330
3331 for (j = 1; j < (unsigned int)argc; j++, i++)
3332 rec_argv[i] = argv[j];
3333
3334 BUG_ON(i != rec_argc);
3335
b0ad8ea6 3336 return cmd_record(i, rec_argv);
1fc35b29
IM		 3337}
3338
b0ad8ea6 3339int cmd_sched(int argc, const char **argv)
0a02ad93 3340{
49b8e2be 3341 static const char default_sort_order[] = "avg, max, switch, runtime";
8a39df8f
AH		 3342 struct perf_sched sched = {
3343 .tool = {
3344 .sample = perf_sched__process_tracepoint_sample,
99a3c3a9 3345 .comm = perf_sched__process_comm,
f3b3614a 3346 .namespaces = perf_event__process_namespaces,
8a39df8f
AH		 3347 .lost = perf_event__process_lost,
3348 .fork = perf_sched__process_fork_event,
0a8cb85c 3349 .ordered_events = true,
8a39df8f
AH		 3350 },
3351 .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid),
3352 .sort_list = LIST_HEAD_INIT(sched.sort_list),
3353 .start_work_mutex = PTHREAD_MUTEX_INITIALIZER,
3354 .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER,
8a39df8f
AH		 3355 .sort_order = default_sort_order,
3356 .replay_repeat = 10,
3357 .profile_cpu = -1,
3358 .next_shortname1 = 'A',
3359 .next_shortname2 = '0',
2f80dd44 3360 .skip_merge = 0,
6c973c90
DA		 3361 .show_callchain = 1,
3362 .max_stack = 5,
8a39df8f 3363 };
77f02f44
NK		 3364 const struct option sched_options[] = {
3365 OPT_STRING('i', "input", &input_name, "file",
3366 "input file name"),
3367 OPT_INCR('v', "verbose", &verbose,
3368 "be more verbose (show symbol address, etc)"),
3369 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
3370 "dump raw trace in ASCII"),
6fa94258 3371 OPT_BOOLEAN('f', "force", &sched.force, "don't complain, do it"),
77f02f44
NK		 3372 OPT_END()
3373 };
0e9b07e5
ACM		 3374 const struct option latency_options[] = {
3375 OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]",
3376 "sort by key(s): runtime, switch, avg, max"),
0e9b07e5
ACM		 3377 OPT_INTEGER('C', "CPU", &sched.profile_cpu,
3378 "CPU to profile on"),
2f80dd44
JB		 3379 OPT_BOOLEAN('p', "pids", &sched.skip_merge,
3380 "latency stats per pid instead of per comm"),
77f02f44 3381 OPT_PARENT(sched_options)
0e9b07e5
ACM		 3382 };
3383 const struct option replay_options[] = {
3384 OPT_UINTEGER('r', "repeat", &sched.replay_repeat,
3385 "repeat the workload replay N times (-1: infinite)"),
77f02f44 3386 OPT_PARENT(sched_options)
0e9b07e5 3387 };
99623c62
JO		 3388 const struct option map_options[] = {
3389 OPT_BOOLEAN(0, "compact", &sched.map.comp,
3390 "map output in compact mode"),
a151a37a
JO		 3391 OPT_STRING(0, "color-pids", &sched.map.color_pids_str, "pids",
3392 "highlight given pids in map"),
cf294f24
JO		 3393 OPT_STRING(0, "color-cpus", &sched.map.color_cpus_str, "cpus",
3394 "highlight given CPUs in map"),
73643bb6
JO		 3395 OPT_STRING(0, "cpus", &sched.map.cpus_str, "cpus",
3396 "display given CPUs in map"),
77f02f44 3397 OPT_PARENT(sched_options)
99623c62 3398 };
49394a2a
DA		 3399 const struct option timehist_options[] = {
3400 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
3401 "file", "vmlinux pathname"),
3402 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
3403 "file", "kallsyms pathname"),
6c973c90
DA		 3404 OPT_BOOLEAN('g', "call-graph", &sched.show_callchain,
3405 "Display call chains if present (default on)"),
3406 OPT_UINTEGER(0, "max-stack", &sched.max_stack,
3407 "Maximum number of functions to display backtrace."),
49394a2a
DA		 3408 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
3409 "Look for files with symbols relative to this directory"),
52df138c
DA		 3410 OPT_BOOLEAN('s', "summary", &sched.summary_only,
3411 "Show only syscall summary with statistics"),
3412 OPT_BOOLEAN('S', "with-summary", &sched.summary,
3413 "Show all syscalls and summary with statistics"),
fc1469f1 3414 OPT_BOOLEAN('w', "wakeups", &sched.show_wakeups, "Show wakeup events"),
292c4a8f 3415 OPT_BOOLEAN('n', "next", &sched.show_next, "Show next task"),
350f54fa 3416 OPT_BOOLEAN('M', "migrations", &sched.show_migrations, "Show migration events"),
a407b067 3417 OPT_BOOLEAN('V', "cpu-visual", &sched.show_cpu_visual, "Add CPU visual"),
07235f84 3418 OPT_BOOLEAN('I', "idle-hist", &sched.idle_hist, "Show idle events only"),
853b7407
DA		 3419 OPT_STRING(0, "time", &sched.time_str, "str",
3420 "Time span for analysis (start,stop)"),
414e050c 3421 OPT_BOOLEAN(0, "state", &sched.show_state, "Show task state when sched-out"),
0f59d7a3
DA		 3422 OPT_STRING('p', "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
3423 "analyze events only for given process id(s)"),
3424 OPT_STRING('t', "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
3425 "analyze events only for given thread id(s)"),
49394a2a
DA		 3426 OPT_PARENT(sched_options)
3427 };
3428
0e9b07e5
ACM		 3429 const char * const latency_usage[] = {
3430 "perf sched latency [<options>]",
3431 NULL
3432 };
3433 const char * const replay_usage[] = {
3434 "perf sched replay [<options>]",
3435 NULL
3436 };
99623c62
JO		 3437 const char * const map_usage[] = {
3438 "perf sched map [<options>]",
3439 NULL
3440 };
49394a2a
DA		 3441 const char * const timehist_usage[] = {
3442 "perf sched timehist [<options>]",
3443 NULL
3444 };
a83edb2d 3445 const char *const sched_subcommands[] = { "record", "latency", "map",
49394a2a
DA		 3446 "replay", "script",
3447 "timehist", NULL };
a83edb2d
RR		 3448 const char *sched_usage[] = {
3449 NULL,
0e9b07e5
ACM		 3450 NULL
3451 };
3452 struct trace_sched_handler lat_ops = {
3453 .wakeup_event = latency_wakeup_event,
3454 .switch_event = latency_switch_event,
3455 .runtime_event = latency_runtime_event,
0e9b07e5
ACM		 3456 .migrate_task_event = latency_migrate_task_event,
3457 };
3458 struct trace_sched_handler map_ops = {
3459 .switch_event = map_switch_event,
3460 };
3461 struct trace_sched_handler replay_ops = {
3462 .wakeup_event = replay_wakeup_event,
3463 .switch_event = replay_switch_event,
3464 .fork_event = replay_fork_event,
3465 };
156a2b02
AH		 3466 unsigned int i;
3467
3468 for (i = 0; i < ARRAY_SIZE(sched.curr_pid); i++)
3469 sched.curr_pid[i] = -1;
0e9b07e5 3470
a83edb2d
RR		 3471 argc = parse_options_subcommand(argc, argv, sched_options, sched_subcommands,
3472 sched_usage, PARSE_OPT_STOP_AT_NON_OPTION);
f2858d8a
IM		 3473 if (!argc)
3474 usage_with_options(sched_usage, sched_options);
0a02ad93 3475
c0777c5a 3476 /*
133dc4c3 3477 * Aliased to 'perf script' for now:
c0777c5a 3478 */
133dc4c3 3479 if (!strcmp(argv[0], "script"))
b0ad8ea6 3480 return cmd_script(argc, argv);
c0777c5a 3481
1fc35b29
IM		 3482 if (!strncmp(argv[0], "rec", 3)) {
3483 return __cmd_record(argc, argv);
3484 } else if (!strncmp(argv[0], "lat", 3)) {
0e9b07e5 3485 sched.tp_handler = &lat_ops;
f2858d8a
IM		 3486 if (argc > 1) {
3487 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
3488 if (argc)
3489 usage_with_options(latency_usage, latency_options);
f2858d8a 3490 }
0e9b07e5
ACM		 3491 setup_sorting(&sched, latency_options, latency_usage);
3492 return perf_sched__lat(&sched);
0ec04e16 3493 } else if (!strcmp(argv[0], "map")) {
99623c62 3494 if (argc) {
a151a37a 3495 argc = parse_options(argc, argv, map_options, map_usage, 0);
99623c62
JO		 3496 if (argc)
3497 usage_with_options(map_usage, map_options);
3498 }
0e9b07e5
ACM		 3499 sched.tp_handler = &map_ops;
3500 setup_sorting(&sched, latency_options, latency_usage);
3501 return perf_sched__map(&sched);
f2858d8a 3502 } else if (!strncmp(argv[0], "rep", 3)) {
0e9b07e5 3503 sched.tp_handler = &replay_ops;
f2858d8a
IM		 3504 if (argc) {
3505 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
3506 if (argc)
3507 usage_with_options(replay_usage, replay_options);
3508 }
0e9b07e5 3509 return perf_sched__replay(&sched);
49394a2a
DA		 3510 } else if (!strcmp(argv[0], "timehist")) {
3511 if (argc) {
3512 argc = parse_options(argc, argv, timehist_options,
3513 timehist_usage, 0);
3514 if (argc)
3515 usage_with_options(timehist_usage, timehist_options);
3516 }
292c4a8f
BG		 3517 if ((sched.show_wakeups || sched.show_next) &&
3518 sched.summary_only) {
3519 pr_err(" Error: -s and -[n|w] are mutually exclusive.\n");
fc1469f1 3520 parse_options_usage(timehist_usage, timehist_options, "s", true);
292c4a8f
BG		 3521 if (sched.show_wakeups)
3522 parse_options_usage(NULL, timehist_options, "w", true);
3523 if (sched.show_next)
3524 parse_options_usage(NULL, timehist_options, "n", true);
fc1469f1
DA		 3525 return -EINVAL;
3526 }
3527
49394a2a 3528 return perf_sched__timehist(&sched);
f2858d8a
IM		 3529 } else {
3530 usage_with_options(sched_usage, sched_options);
3531 }
3532
ec156764 3533 return 0;
0a02ad93 3534}
Ubuntu Jammy Linux kernel mirror