Commit | Line | Data |
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0a02ad93 IM |
1 | #include "builtin.h" |
2 | ||
3 | #include "util/util.h" | |
4 | #include "util/cache.h" | |
5 | #include "util/symbol.h" | |
6 | #include "util/thread.h" | |
7 | #include "util/header.h" | |
8 | ||
9 | #include "util/parse-options.h" | |
10 | ||
11 | #include "perf.h" | |
12 | #include "util/debug.h" | |
13 | ||
14 | #include "util/trace-event.h" | |
ec156764 | 15 | #include <sys/types.h> |
0a02ad93 | 16 | |
419ab0d6 FW |
17 | |
18 | #define MAX_CPUS 4096 | |
19 | ||
ec156764 IM |
20 | static char const *input_name = "perf.data"; |
21 | static int input; | |
22 | static unsigned long page_size; | |
23 | static unsigned long mmap_window = 32; | |
0a02ad93 | 24 | |
ec156764 | 25 | static unsigned long total_comm = 0; |
0a02ad93 | 26 | |
ec156764 IM |
27 | static struct rb_root threads; |
28 | static struct thread *last_match; | |
0a02ad93 | 29 | |
ec156764 IM |
30 | static struct perf_header *header; |
31 | static u64 sample_type; | |
0a02ad93 | 32 | |
419ab0d6 | 33 | static int replay_mode; |
cdce9d73 | 34 | static int lat_mode; |
419ab0d6 | 35 | |
0a02ad93 | 36 | |
ec156764 IM |
37 | /* |
38 | * Scheduler benchmarks | |
39 | */ | |
40 | #include <sys/resource.h> | |
41 | #include <sys/types.h> | |
42 | #include <sys/stat.h> | |
43 | #include <sys/time.h> | |
44 | #include <sys/prctl.h> | |
45 | ||
46 | #include <linux/unistd.h> | |
47 | ||
48 | #include <semaphore.h> | |
49 | #include <pthread.h> | |
50 | #include <signal.h> | |
51 | #include <values.h> | |
52 | #include <string.h> | |
53 | #include <unistd.h> | |
54 | #include <stdlib.h> | |
55 | #include <assert.h> | |
56 | #include <fcntl.h> | |
57 | #include <time.h> | |
58 | #include <math.h> | |
59 | ||
60 | #include <stdio.h> | |
61 | ||
62 | #define PR_SET_NAME 15 /* Set process name */ | |
63 | ||
64 | #define BUG_ON(x) assert(!(x)) | |
65 | ||
fbf94829 | 66 | #define DEBUG 0 |
ec156764 IM |
67 | |
68 | typedef unsigned long long nsec_t; | |
69 | ||
ec156764 IM |
70 | static nsec_t run_measurement_overhead; |
71 | static nsec_t sleep_measurement_overhead; | |
72 | ||
73 | static nsec_t get_nsecs(void) | |
74 | { | |
75 | struct timespec ts; | |
76 | ||
77 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
78 | ||
79 | return ts.tv_sec * 1000000000ULL + ts.tv_nsec; | |
80 | } | |
81 | ||
82 | static void burn_nsecs(nsec_t nsecs) | |
83 | { | |
84 | nsec_t T0 = get_nsecs(), T1; | |
85 | ||
86 | do { | |
87 | T1 = get_nsecs(); | |
88 | } while (T1 + run_measurement_overhead < T0 + nsecs); | |
89 | } | |
90 | ||
91 | static void sleep_nsecs(nsec_t nsecs) | |
92 | { | |
93 | struct timespec ts; | |
94 | ||
95 | ts.tv_nsec = nsecs % 999999999; | |
96 | ts.tv_sec = nsecs / 999999999; | |
97 | ||
98 | nanosleep(&ts, NULL); | |
99 | } | |
100 | ||
101 | static void calibrate_run_measurement_overhead(void) | |
102 | { | |
103 | nsec_t T0, T1, delta, min_delta = 1000000000ULL; | |
104 | int i; | |
105 | ||
106 | for (i = 0; i < 10; i++) { | |
107 | T0 = get_nsecs(); | |
108 | burn_nsecs(0); | |
109 | T1 = get_nsecs(); | |
110 | delta = T1-T0; | |
111 | min_delta = min(min_delta, delta); | |
112 | } | |
113 | run_measurement_overhead = min_delta; | |
114 | ||
ad236fd2 | 115 | printf("run measurement overhead: %Ld nsecs\n", min_delta); |
ec156764 IM |
116 | } |
117 | ||
118 | static void calibrate_sleep_measurement_overhead(void) | |
119 | { | |
120 | nsec_t T0, T1, delta, min_delta = 1000000000ULL; | |
121 | int i; | |
122 | ||
123 | for (i = 0; i < 10; i++) { | |
124 | T0 = get_nsecs(); | |
125 | sleep_nsecs(10000); | |
126 | T1 = get_nsecs(); | |
127 | delta = T1-T0; | |
128 | min_delta = min(min_delta, delta); | |
129 | } | |
130 | min_delta -= 10000; | |
131 | sleep_measurement_overhead = min_delta; | |
132 | ||
ad236fd2 | 133 | printf("sleep measurement overhead: %Ld nsecs\n", min_delta); |
ec156764 IM |
134 | } |
135 | ||
136 | #define COMM_LEN 20 | |
137 | #define SYM_LEN 129 | |
138 | ||
139 | #define MAX_PID 65536 | |
140 | ||
141 | static unsigned long nr_tasks; | |
142 | ||
143 | struct sched_event; | |
144 | ||
145 | struct task_desc { | |
146 | unsigned long nr; | |
147 | unsigned long pid; | |
148 | char comm[COMM_LEN]; | |
149 | ||
150 | unsigned long nr_events; | |
151 | unsigned long curr_event; | |
152 | struct sched_event **events; | |
153 | ||
154 | pthread_t thread; | |
155 | sem_t sleep_sem; | |
156 | ||
157 | sem_t ready_for_work; | |
158 | sem_t work_done_sem; | |
159 | ||
160 | nsec_t cpu_usage; | |
161 | }; | |
162 | ||
163 | enum sched_event_type { | |
164 | SCHED_EVENT_RUN, | |
165 | SCHED_EVENT_SLEEP, | |
166 | SCHED_EVENT_WAKEUP, | |
167 | }; | |
168 | ||
169 | struct sched_event { | |
170 | enum sched_event_type type; | |
171 | nsec_t timestamp; | |
172 | nsec_t duration; | |
173 | unsigned long nr; | |
174 | int specific_wait; | |
175 | sem_t *wait_sem; | |
176 | struct task_desc *wakee; | |
177 | }; | |
178 | ||
179 | static struct task_desc *pid_to_task[MAX_PID]; | |
180 | ||
181 | static struct task_desc **tasks; | |
182 | ||
183 | static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER; | |
184 | static nsec_t start_time; | |
185 | ||
186 | static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER; | |
187 | ||
188 | static unsigned long nr_run_events; | |
189 | static unsigned long nr_sleep_events; | |
190 | static unsigned long nr_wakeup_events; | |
191 | ||
192 | static unsigned long nr_sleep_corrections; | |
193 | static unsigned long nr_run_events_optimized; | |
194 | ||
195 | static struct sched_event * | |
196 | get_new_event(struct task_desc *task, nsec_t timestamp) | |
197 | { | |
198 | struct sched_event *event = calloc(1, sizeof(*event)); | |
199 | unsigned long idx = task->nr_events; | |
200 | size_t size; | |
201 | ||
202 | event->timestamp = timestamp; | |
203 | event->nr = idx; | |
204 | ||
205 | task->nr_events++; | |
206 | size = sizeof(struct sched_event *) * task->nr_events; | |
207 | task->events = realloc(task->events, size); | |
208 | BUG_ON(!task->events); | |
209 | ||
210 | task->events[idx] = event; | |
211 | ||
212 | return event; | |
213 | } | |
214 | ||
215 | static struct sched_event *last_event(struct task_desc *task) | |
216 | { | |
217 | if (!task->nr_events) | |
218 | return NULL; | |
219 | ||
220 | return task->events[task->nr_events - 1]; | |
221 | } | |
222 | ||
223 | static void | |
fbf94829 | 224 | add_sched_event_run(struct task_desc *task, nsec_t timestamp, u64 duration) |
ec156764 IM |
225 | { |
226 | struct sched_event *event, *curr_event = last_event(task); | |
227 | ||
228 | /* | |
fbf94829 IM |
229 | * optimize an existing RUN event by merging this one |
230 | * to it: | |
231 | */ | |
ec156764 IM |
232 | if (curr_event && curr_event->type == SCHED_EVENT_RUN) { |
233 | nr_run_events_optimized++; | |
234 | curr_event->duration += duration; | |
235 | return; | |
236 | } | |
237 | ||
238 | event = get_new_event(task, timestamp); | |
239 | ||
240 | event->type = SCHED_EVENT_RUN; | |
241 | event->duration = duration; | |
242 | ||
243 | nr_run_events++; | |
244 | } | |
245 | ||
ea92ed5a IM |
246 | static unsigned long targetless_wakeups; |
247 | static unsigned long multitarget_wakeups; | |
ec156764 IM |
248 | |
249 | static void | |
250 | add_sched_event_wakeup(struct task_desc *task, nsec_t timestamp, | |
251 | struct task_desc *wakee) | |
252 | { | |
253 | struct sched_event *event, *wakee_event; | |
254 | ||
255 | event = get_new_event(task, timestamp); | |
256 | event->type = SCHED_EVENT_WAKEUP; | |
257 | event->wakee = wakee; | |
258 | ||
259 | wakee_event = last_event(wakee); | |
260 | if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) { | |
261 | targetless_wakeups++; | |
262 | return; | |
263 | } | |
264 | if (wakee_event->wait_sem) { | |
265 | multitarget_wakeups++; | |
266 | return; | |
267 | } | |
268 | ||
269 | wakee_event->wait_sem = calloc(1, sizeof(*wakee_event->wait_sem)); | |
270 | sem_init(wakee_event->wait_sem, 0, 0); | |
271 | wakee_event->specific_wait = 1; | |
272 | event->wait_sem = wakee_event->wait_sem; | |
273 | ||
274 | nr_wakeup_events++; | |
275 | } | |
276 | ||
277 | static void | |
278 | add_sched_event_sleep(struct task_desc *task, nsec_t timestamp, | |
ad236fd2 | 279 | u64 task_state __used) |
ec156764 IM |
280 | { |
281 | struct sched_event *event = get_new_event(task, timestamp); | |
282 | ||
283 | event->type = SCHED_EVENT_SLEEP; | |
284 | ||
285 | nr_sleep_events++; | |
286 | } | |
287 | ||
288 | static struct task_desc *register_pid(unsigned long pid, const char *comm) | |
289 | { | |
290 | struct task_desc *task; | |
291 | ||
292 | BUG_ON(pid >= MAX_PID); | |
293 | ||
294 | task = pid_to_task[pid]; | |
295 | ||
296 | if (task) | |
297 | return task; | |
298 | ||
299 | task = calloc(1, sizeof(*task)); | |
300 | task->pid = pid; | |
301 | task->nr = nr_tasks; | |
302 | strcpy(task->comm, comm); | |
303 | /* | |
304 | * every task starts in sleeping state - this gets ignored | |
305 | * if there's no wakeup pointing to this sleep state: | |
306 | */ | |
307 | add_sched_event_sleep(task, 0, 0); | |
308 | ||
309 | pid_to_task[pid] = task; | |
310 | nr_tasks++; | |
311 | tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *)); | |
312 | BUG_ON(!tasks); | |
313 | tasks[task->nr] = task; | |
314 | ||
ad236fd2 IM |
315 | if (verbose) |
316 | printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm); | |
ec156764 IM |
317 | |
318 | return task; | |
319 | } | |
320 | ||
321 | ||
ec156764 IM |
322 | static void print_task_traces(void) |
323 | { | |
324 | struct task_desc *task; | |
325 | unsigned long i; | |
326 | ||
327 | for (i = 0; i < nr_tasks; i++) { | |
328 | task = tasks[i]; | |
ad236fd2 | 329 | printf("task %6ld (%20s:%10ld), nr_events: %ld\n", |
ec156764 IM |
330 | task->nr, task->comm, task->pid, task->nr_events); |
331 | } | |
332 | } | |
333 | ||
334 | static void add_cross_task_wakeups(void) | |
335 | { | |
336 | struct task_desc *task1, *task2; | |
337 | unsigned long i, j; | |
338 | ||
339 | for (i = 0; i < nr_tasks; i++) { | |
340 | task1 = tasks[i]; | |
341 | j = i + 1; | |
342 | if (j == nr_tasks) | |
343 | j = 0; | |
344 | task2 = tasks[j]; | |
345 | add_sched_event_wakeup(task1, 0, task2); | |
346 | } | |
347 | } | |
348 | ||
349 | static void | |
fbf94829 | 350 | process_sched_event(struct task_desc *this_task __used, struct sched_event *event) |
ec156764 IM |
351 | { |
352 | int ret = 0; | |
353 | nsec_t now; | |
354 | long long delta; | |
355 | ||
356 | now = get_nsecs(); | |
357 | delta = start_time + event->timestamp - now; | |
358 | ||
ec156764 IM |
359 | switch (event->type) { |
360 | case SCHED_EVENT_RUN: | |
ec156764 IM |
361 | burn_nsecs(event->duration); |
362 | break; | |
363 | case SCHED_EVENT_SLEEP: | |
ec156764 IM |
364 | if (event->wait_sem) |
365 | ret = sem_wait(event->wait_sem); | |
366 | BUG_ON(ret); | |
367 | break; | |
368 | case SCHED_EVENT_WAKEUP: | |
ec156764 IM |
369 | if (event->wait_sem) |
370 | ret = sem_post(event->wait_sem); | |
371 | BUG_ON(ret); | |
372 | break; | |
373 | default: | |
374 | BUG_ON(1); | |
375 | } | |
376 | } | |
377 | ||
378 | static nsec_t get_cpu_usage_nsec_parent(void) | |
379 | { | |
380 | struct rusage ru; | |
381 | nsec_t sum; | |
382 | int err; | |
383 | ||
384 | err = getrusage(RUSAGE_SELF, &ru); | |
385 | BUG_ON(err); | |
386 | ||
387 | sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3; | |
388 | sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3; | |
389 | ||
390 | return sum; | |
391 | } | |
392 | ||
393 | static nsec_t get_cpu_usage_nsec_self(void) | |
394 | { | |
395 | char filename [] = "/proc/1234567890/sched"; | |
396 | unsigned long msecs, nsecs; | |
397 | char *line = NULL; | |
398 | nsec_t total = 0; | |
399 | size_t len = 0; | |
400 | ssize_t chars; | |
401 | FILE *file; | |
402 | int ret; | |
403 | ||
404 | sprintf(filename, "/proc/%d/sched", getpid()); | |
405 | file = fopen(filename, "r"); | |
406 | BUG_ON(!file); | |
407 | ||
408 | while ((chars = getline(&line, &len, file)) != -1) { | |
ec156764 IM |
409 | ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n", |
410 | &msecs, &nsecs); | |
411 | if (ret == 2) { | |
412 | total = msecs*1e6 + nsecs; | |
ec156764 IM |
413 | break; |
414 | } | |
415 | } | |
416 | if (line) | |
417 | free(line); | |
418 | fclose(file); | |
419 | ||
420 | return total; | |
421 | } | |
422 | ||
423 | static void *thread_func(void *ctx) | |
424 | { | |
425 | struct task_desc *this_task = ctx; | |
426 | nsec_t cpu_usage_0, cpu_usage_1; | |
427 | unsigned long i, ret; | |
428 | char comm2[22]; | |
429 | ||
ec156764 IM |
430 | sprintf(comm2, ":%s", this_task->comm); |
431 | prctl(PR_SET_NAME, comm2); | |
432 | ||
433 | again: | |
434 | ret = sem_post(&this_task->ready_for_work); | |
435 | BUG_ON(ret); | |
ec156764 IM |
436 | ret = pthread_mutex_lock(&start_work_mutex); |
437 | BUG_ON(ret); | |
438 | ret = pthread_mutex_unlock(&start_work_mutex); | |
439 | BUG_ON(ret); | |
ec156764 IM |
440 | |
441 | cpu_usage_0 = get_cpu_usage_nsec_self(); | |
442 | ||
443 | for (i = 0; i < this_task->nr_events; i++) { | |
444 | this_task->curr_event = i; | |
445 | process_sched_event(this_task, this_task->events[i]); | |
446 | } | |
447 | ||
448 | cpu_usage_1 = get_cpu_usage_nsec_self(); | |
449 | this_task->cpu_usage = cpu_usage_1 - cpu_usage_0; | |
450 | ||
ec156764 IM |
451 | ret = sem_post(&this_task->work_done_sem); |
452 | BUG_ON(ret); | |
ec156764 IM |
453 | |
454 | ret = pthread_mutex_lock(&work_done_wait_mutex); | |
455 | BUG_ON(ret); | |
456 | ret = pthread_mutex_unlock(&work_done_wait_mutex); | |
457 | BUG_ON(ret); | |
ec156764 IM |
458 | |
459 | goto again; | |
460 | } | |
461 | ||
462 | static void create_tasks(void) | |
463 | { | |
464 | struct task_desc *task; | |
465 | pthread_attr_t attr; | |
466 | unsigned long i; | |
467 | int err; | |
468 | ||
469 | err = pthread_attr_init(&attr); | |
470 | BUG_ON(err); | |
471 | err = pthread_attr_setstacksize(&attr, (size_t)(16*1024)); | |
472 | BUG_ON(err); | |
473 | err = pthread_mutex_lock(&start_work_mutex); | |
474 | BUG_ON(err); | |
475 | err = pthread_mutex_lock(&work_done_wait_mutex); | |
476 | BUG_ON(err); | |
477 | for (i = 0; i < nr_tasks; i++) { | |
478 | task = tasks[i]; | |
479 | sem_init(&task->sleep_sem, 0, 0); | |
480 | sem_init(&task->ready_for_work, 0, 0); | |
481 | sem_init(&task->work_done_sem, 0, 0); | |
482 | task->curr_event = 0; | |
483 | err = pthread_create(&task->thread, &attr, thread_func, task); | |
484 | BUG_ON(err); | |
485 | } | |
486 | } | |
487 | ||
ea92ed5a IM |
488 | static nsec_t cpu_usage; |
489 | static nsec_t runavg_cpu_usage; | |
490 | static nsec_t parent_cpu_usage; | |
491 | static nsec_t runavg_parent_cpu_usage; | |
ec156764 IM |
492 | |
493 | static void wait_for_tasks(void) | |
494 | { | |
495 | nsec_t cpu_usage_0, cpu_usage_1; | |
496 | struct task_desc *task; | |
497 | unsigned long i, ret; | |
498 | ||
ec156764 | 499 | start_time = get_nsecs(); |
ec156764 IM |
500 | cpu_usage = 0; |
501 | pthread_mutex_unlock(&work_done_wait_mutex); | |
502 | ||
503 | for (i = 0; i < nr_tasks; i++) { | |
504 | task = tasks[i]; | |
505 | ret = sem_wait(&task->ready_for_work); | |
506 | BUG_ON(ret); | |
507 | sem_init(&task->ready_for_work, 0, 0); | |
508 | } | |
509 | ret = pthread_mutex_lock(&work_done_wait_mutex); | |
510 | BUG_ON(ret); | |
511 | ||
512 | cpu_usage_0 = get_cpu_usage_nsec_parent(); | |
513 | ||
514 | pthread_mutex_unlock(&start_work_mutex); | |
515 | ||
ec156764 IM |
516 | for (i = 0; i < nr_tasks; i++) { |
517 | task = tasks[i]; | |
518 | ret = sem_wait(&task->work_done_sem); | |
519 | BUG_ON(ret); | |
520 | sem_init(&task->work_done_sem, 0, 0); | |
521 | cpu_usage += task->cpu_usage; | |
522 | task->cpu_usage = 0; | |
523 | } | |
524 | ||
525 | cpu_usage_1 = get_cpu_usage_nsec_parent(); | |
526 | if (!runavg_cpu_usage) | |
527 | runavg_cpu_usage = cpu_usage; | |
528 | runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10; | |
529 | ||
530 | parent_cpu_usage = cpu_usage_1 - cpu_usage_0; | |
531 | if (!runavg_parent_cpu_usage) | |
532 | runavg_parent_cpu_usage = parent_cpu_usage; | |
533 | runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 + | |
534 | parent_cpu_usage)/10; | |
535 | ||
536 | ret = pthread_mutex_lock(&start_work_mutex); | |
537 | BUG_ON(ret); | |
538 | ||
539 | for (i = 0; i < nr_tasks; i++) { | |
540 | task = tasks[i]; | |
541 | sem_init(&task->sleep_sem, 0, 0); | |
542 | task->curr_event = 0; | |
543 | } | |
544 | } | |
545 | ||
46f392c9 | 546 | static int read_events(void); |
ec156764 IM |
547 | |
548 | static unsigned long nr_runs; | |
549 | static nsec_t sum_runtime; | |
550 | static nsec_t sum_fluct; | |
551 | static nsec_t run_avg; | |
552 | ||
553 | static void run_one_test(void) | |
554 | { | |
555 | nsec_t T0, T1, delta, avg_delta, fluct, std_dev; | |
556 | ||
557 | T0 = get_nsecs(); | |
558 | wait_for_tasks(); | |
559 | T1 = get_nsecs(); | |
560 | ||
561 | delta = T1 - T0; | |
562 | sum_runtime += delta; | |
563 | nr_runs++; | |
564 | ||
565 | avg_delta = sum_runtime / nr_runs; | |
566 | if (delta < avg_delta) | |
567 | fluct = avg_delta - delta; | |
568 | else | |
569 | fluct = delta - avg_delta; | |
570 | sum_fluct += fluct; | |
571 | std_dev = sum_fluct / nr_runs / sqrt(nr_runs); | |
572 | if (!run_avg) | |
573 | run_avg = delta; | |
574 | run_avg = (run_avg*9 + delta)/10; | |
575 | ||
ad236fd2 | 576 | printf("#%-3ld: %0.3f, ", |
ec156764 IM |
577 | nr_runs, (double)delta/1000000.0); |
578 | ||
579 | #if 0 | |
ad236fd2 | 580 | printf("%0.2f +- %0.2f, ", |
ec156764 IM |
581 | (double)avg_delta/1e6, (double)std_dev/1e6); |
582 | #endif | |
ad236fd2 | 583 | printf("ravg: %0.2f, ", |
ec156764 IM |
584 | (double)run_avg/1e6); |
585 | ||
ad236fd2 | 586 | printf("cpu: %0.2f / %0.2f", |
ec156764 IM |
587 | (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6); |
588 | ||
589 | #if 0 | |
590 | /* | |
fbf94829 IM |
591 | * rusage statistics done by the parent, these are less |
592 | * accurate than the sum_exec_runtime based statistics: | |
593 | */ | |
ad236fd2 | 594 | printf(" [%0.2f / %0.2f]", |
ec156764 IM |
595 | (double)parent_cpu_usage/1e6, |
596 | (double)runavg_parent_cpu_usage/1e6); | |
597 | #endif | |
598 | ||
ad236fd2 | 599 | printf("\n"); |
ec156764 IM |
600 | |
601 | if (nr_sleep_corrections) | |
ad236fd2 | 602 | printf(" (%ld sleep corrections)\n", nr_sleep_corrections); |
ec156764 IM |
603 | nr_sleep_corrections = 0; |
604 | } | |
605 | ||
606 | static void test_calibrations(void) | |
607 | { | |
608 | nsec_t T0, T1; | |
609 | ||
610 | T0 = get_nsecs(); | |
611 | burn_nsecs(1e6); | |
612 | T1 = get_nsecs(); | |
613 | ||
ad236fd2 | 614 | printf("the run test took %Ld nsecs\n", T1-T0); |
ec156764 IM |
615 | |
616 | T0 = get_nsecs(); | |
617 | sleep_nsecs(1e6); | |
618 | T1 = get_nsecs(); | |
619 | ||
ad236fd2 | 620 | printf("the sleep test took %Ld nsecs\n", T1-T0); |
ec156764 IM |
621 | } |
622 | ||
46f392c9 IM |
623 | static void __cmd_replay(void) |
624 | { | |
625 | long nr_iterations = 10, i; | |
626 | ||
627 | calibrate_run_measurement_overhead(); | |
628 | calibrate_sleep_measurement_overhead(); | |
629 | ||
630 | test_calibrations(); | |
631 | ||
632 | read_events(); | |
633 | ||
634 | printf("nr_run_events: %ld\n", nr_run_events); | |
635 | printf("nr_sleep_events: %ld\n", nr_sleep_events); | |
636 | printf("nr_wakeup_events: %ld\n", nr_wakeup_events); | |
637 | ||
638 | if (targetless_wakeups) | |
639 | printf("target-less wakeups: %ld\n", targetless_wakeups); | |
640 | if (multitarget_wakeups) | |
641 | printf("multi-target wakeups: %ld\n", multitarget_wakeups); | |
642 | if (nr_run_events_optimized) | |
643 | printf("run events optimized: %ld\n", | |
644 | nr_run_events_optimized); | |
645 | ||
646 | print_task_traces(); | |
647 | add_cross_task_wakeups(); | |
648 | ||
649 | create_tasks(); | |
650 | printf("------------------------------------------------------------\n"); | |
651 | for (i = 0; i < nr_iterations; i++) | |
652 | run_one_test(); | |
653 | } | |
654 | ||
0a02ad93 IM |
655 | static int |
656 | process_comm_event(event_t *event, unsigned long offset, unsigned long head) | |
657 | { | |
658 | struct thread *thread; | |
659 | ||
660 | thread = threads__findnew(event->comm.pid, &threads, &last_match); | |
661 | ||
662 | dump_printf("%p [%p]: PERF_EVENT_COMM: %s:%d\n", | |
663 | (void *)(offset + head), | |
664 | (void *)(long)(event->header.size), | |
665 | event->comm.comm, event->comm.pid); | |
666 | ||
667 | if (thread == NULL || | |
668 | thread__set_comm(thread, event->comm.comm)) { | |
669 | dump_printf("problem processing PERF_EVENT_COMM, skipping event.\n"); | |
670 | return -1; | |
671 | } | |
672 | total_comm++; | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
46538818 FW |
677 | |
678 | struct raw_event_sample { | |
679 | u32 size; | |
680 | char data[0]; | |
681 | }; | |
682 | ||
683 | #define FILL_FIELD(ptr, field, event, data) \ | |
684 | ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data) | |
685 | ||
686 | #define FILL_ARRAY(ptr, array, event, data) \ | |
687 | do { \ | |
688 | void *__array = raw_field_ptr(event, #array, data); \ | |
689 | memcpy(ptr.array, __array, sizeof(ptr.array)); \ | |
690 | } while(0) | |
691 | ||
692 | #define FILL_COMMON_FIELDS(ptr, event, data) \ | |
693 | do { \ | |
694 | FILL_FIELD(ptr, common_type, event, data); \ | |
695 | FILL_FIELD(ptr, common_flags, event, data); \ | |
696 | FILL_FIELD(ptr, common_preempt_count, event, data); \ | |
697 | FILL_FIELD(ptr, common_pid, event, data); \ | |
698 | FILL_FIELD(ptr, common_tgid, event, data); \ | |
699 | } while (0) | |
700 | ||
419ab0d6 FW |
701 | |
702 | ||
703 | struct trace_switch_event { | |
704 | u32 size; | |
705 | ||
706 | u16 common_type; | |
707 | u8 common_flags; | |
708 | u8 common_preempt_count; | |
709 | u32 common_pid; | |
710 | u32 common_tgid; | |
711 | ||
712 | char prev_comm[16]; | |
713 | u32 prev_pid; | |
714 | u32 prev_prio; | |
715 | u64 prev_state; | |
716 | char next_comm[16]; | |
717 | u32 next_pid; | |
718 | u32 next_prio; | |
719 | }; | |
720 | ||
721 | ||
fbf94829 IM |
722 | struct trace_wakeup_event { |
723 | u32 size; | |
724 | ||
725 | u16 common_type; | |
726 | u8 common_flags; | |
727 | u8 common_preempt_count; | |
728 | u32 common_pid; | |
729 | u32 common_tgid; | |
730 | ||
731 | char comm[16]; | |
732 | u32 pid; | |
733 | ||
734 | u32 prio; | |
735 | u32 success; | |
736 | u32 cpu; | |
737 | }; | |
738 | ||
419ab0d6 FW |
739 | struct trace_fork_event { |
740 | u32 size; | |
46538818 | 741 | |
419ab0d6 FW |
742 | u16 common_type; |
743 | u8 common_flags; | |
744 | u8 common_preempt_count; | |
745 | u32 common_pid; | |
746 | u32 common_tgid; | |
747 | ||
748 | char parent_comm[16]; | |
749 | u32 parent_pid; | |
750 | char child_comm[16]; | |
751 | u32 child_pid; | |
752 | }; | |
753 | ||
754 | struct trace_sched_handler { | |
755 | void (*switch_event)(struct trace_switch_event *, | |
756 | struct event *, | |
757 | int cpu, | |
758 | u64 timestamp, | |
759 | struct thread *thread); | |
760 | ||
761 | void (*wakeup_event)(struct trace_wakeup_event *, | |
762 | struct event *, | |
763 | int cpu, | |
764 | u64 timestamp, | |
765 | struct thread *thread); | |
766 | ||
767 | void (*fork_event)(struct trace_fork_event *, | |
768 | struct event *, | |
769 | int cpu, | |
770 | u64 timestamp, | |
771 | struct thread *thread); | |
772 | }; | |
46538818 | 773 | |
46538818 | 774 | |
419ab0d6 FW |
775 | static void |
776 | replay_wakeup_event(struct trace_wakeup_event *wakeup_event, | |
777 | struct event *event, | |
778 | int cpu __used, | |
779 | u64 timestamp __used, | |
780 | struct thread *thread __used) | |
781 | { | |
782 | struct task_desc *waker, *wakee; | |
fbf94829 | 783 | |
ad236fd2 IM |
784 | if (verbose) { |
785 | printf("sched_wakeup event %p\n", event); | |
fbf94829 | 786 | |
ad236fd2 | 787 | printf(" ... pid %d woke up %s/%d\n", |
419ab0d6 FW |
788 | wakeup_event->common_pid, |
789 | wakeup_event->comm, | |
790 | wakeup_event->pid); | |
ad236fd2 | 791 | } |
fbf94829 | 792 | |
419ab0d6 FW |
793 | waker = register_pid(wakeup_event->common_pid, "<unknown>"); |
794 | wakee = register_pid(wakeup_event->pid, wakeup_event->comm); | |
fbf94829 IM |
795 | |
796 | add_sched_event_wakeup(waker, timestamp, wakee); | |
ec156764 IM |
797 | } |
798 | ||
419ab0d6 | 799 | static unsigned long cpu_last_switched[MAX_CPUS]; |
fbf94829 IM |
800 | |
801 | static void | |
419ab0d6 FW |
802 | replay_switch_event(struct trace_switch_event *switch_event, |
803 | struct event *event, | |
804 | int cpu, | |
805 | u64 timestamp, | |
806 | struct thread *thread __used) | |
ec156764 | 807 | { |
fbf94829 IM |
808 | struct task_desc *prev, *next; |
809 | u64 timestamp0; | |
810 | s64 delta; | |
811 | ||
ad236fd2 IM |
812 | if (verbose) |
813 | printf("sched_switch event %p\n", event); | |
814 | ||
fbf94829 IM |
815 | if (cpu >= MAX_CPUS || cpu < 0) |
816 | return; | |
817 | ||
818 | timestamp0 = cpu_last_switched[cpu]; | |
819 | if (timestamp0) | |
820 | delta = timestamp - timestamp0; | |
821 | else | |
822 | delta = 0; | |
823 | ||
824 | if (delta < 0) | |
825 | die("hm, delta: %Ld < 0 ?\n", delta); | |
826 | ||
ad236fd2 IM |
827 | if (verbose) { |
828 | printf(" ... switch from %s/%d to %s/%d [ran %Ld nsecs]\n", | |
419ab0d6 FW |
829 | switch_event->prev_comm, switch_event->prev_pid, |
830 | switch_event->next_comm, switch_event->next_pid, | |
ad236fd2 IM |
831 | delta); |
832 | } | |
fbf94829 | 833 | |
419ab0d6 FW |
834 | prev = register_pid(switch_event->prev_pid, switch_event->prev_comm); |
835 | next = register_pid(switch_event->next_pid, switch_event->next_comm); | |
fbf94829 IM |
836 | |
837 | cpu_last_switched[cpu] = timestamp; | |
838 | ||
839 | add_sched_event_run(prev, timestamp, delta); | |
419ab0d6 | 840 | add_sched_event_sleep(prev, timestamp, switch_event->prev_state); |
fbf94829 IM |
841 | } |
842 | ||
fbf94829 | 843 | |
419ab0d6 FW |
844 | static void |
845 | replay_fork_event(struct trace_fork_event *fork_event, | |
846 | struct event *event, | |
847 | int cpu __used, | |
848 | u64 timestamp __used, | |
849 | struct thread *thread __used) | |
850 | { | |
851 | if (verbose) { | |
852 | printf("sched_fork event %p\n", event); | |
853 | printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid); | |
854 | printf("... child: %s/%d\n", fork_event->child_comm, fork_event->child_pid); | |
855 | } | |
856 | register_pid(fork_event->parent_pid, fork_event->parent_comm); | |
857 | register_pid(fork_event->child_pid, fork_event->child_comm); | |
858 | } | |
fbf94829 | 859 | |
419ab0d6 | 860 | static struct trace_sched_handler replay_ops = { |
ea92ed5a IM |
861 | .wakeup_event = replay_wakeup_event, |
862 | .switch_event = replay_switch_event, | |
863 | .fork_event = replay_fork_event, | |
fbf94829 IM |
864 | }; |
865 | ||
cdce9d73 FW |
866 | #define TASK_STATE_TO_CHAR_STR "RSDTtZX" |
867 | ||
868 | enum thread_state { | |
869 | THREAD_SLEEPING, | |
870 | THREAD_WAKED_UP, | |
871 | THREAD_SCHED_IN, | |
872 | THREAD_IGNORE | |
873 | }; | |
874 | ||
17562205 | 875 | struct work_atom { |
cdce9d73 FW |
876 | struct list_head list; |
877 | enum thread_state state; | |
878 | u64 wake_up_time; | |
879 | u64 sched_in_time; | |
ea92ed5a | 880 | u64 runtime; |
cdce9d73 FW |
881 | }; |
882 | ||
17562205 | 883 | struct task_atoms { |
cdce9d73 FW |
884 | struct list_head snapshot_list; |
885 | struct thread *thread; | |
886 | struct rb_node node; | |
887 | }; | |
888 | ||
889 | static struct rb_root lat_snapshot_root; | |
890 | ||
17562205 FW |
891 | static struct task_atoms * |
892 | thread_atom_list_search(struct rb_root *root, struct thread *thread) | |
cdce9d73 FW |
893 | { |
894 | struct rb_node *node = root->rb_node; | |
895 | ||
896 | while (node) { | |
17562205 | 897 | struct task_atoms *atoms; |
cdce9d73 | 898 | |
17562205 FW |
899 | atoms = container_of(node, struct task_atoms, node); |
900 | if (thread->pid < atoms->thread->pid) | |
cdce9d73 | 901 | node = node->rb_left; |
17562205 | 902 | else if (thread->pid > atoms->thread->pid) |
cdce9d73 FW |
903 | node = node->rb_right; |
904 | else { | |
17562205 | 905 | return atoms; |
cdce9d73 FW |
906 | } |
907 | } | |
908 | return NULL; | |
909 | } | |
910 | ||
911 | static void | |
17562205 | 912 | __thread_latency_insert(struct rb_root *root, struct task_atoms *data) |
cdce9d73 FW |
913 | { |
914 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
915 | ||
916 | while (*new) { | |
17562205 | 917 | struct task_atoms *this; |
cdce9d73 | 918 | |
17562205 | 919 | this = container_of(*new, struct task_atoms, node); |
cdce9d73 FW |
920 | parent = *new; |
921 | if (data->thread->pid < this->thread->pid) | |
922 | new = &((*new)->rb_left); | |
923 | else if (data->thread->pid > this->thread->pid) | |
924 | new = &((*new)->rb_right); | |
925 | else | |
926 | die("Double thread insertion\n"); | |
927 | } | |
928 | ||
929 | rb_link_node(&data->node, parent, new); | |
930 | rb_insert_color(&data->node, root); | |
931 | } | |
932 | ||
17562205 | 933 | static void thread_atom_list_insert(struct thread *thread) |
cdce9d73 | 934 | { |
17562205 FW |
935 | struct task_atoms *atoms; |
936 | atoms = calloc(sizeof(*atoms), 1); | |
937 | if (!atoms) | |
cdce9d73 FW |
938 | die("No memory"); |
939 | ||
17562205 FW |
940 | atoms->thread = thread; |
941 | INIT_LIST_HEAD(&atoms->snapshot_list); | |
942 | __thread_latency_insert(&lat_snapshot_root, atoms); | |
cdce9d73 FW |
943 | } |
944 | ||
945 | static void | |
946 | latency_fork_event(struct trace_fork_event *fork_event __used, | |
947 | struct event *event __used, | |
948 | int cpu __used, | |
949 | u64 timestamp __used, | |
950 | struct thread *thread __used) | |
951 | { | |
952 | /* should insert the newcomer */ | |
953 | } | |
954 | ||
ea92ed5a | 955 | __used |
cdce9d73 FW |
956 | static char sched_out_state(struct trace_switch_event *switch_event) |
957 | { | |
958 | const char *str = TASK_STATE_TO_CHAR_STR; | |
959 | ||
960 | return str[switch_event->prev_state]; | |
961 | } | |
962 | ||
963 | static void | |
17562205 | 964 | lat_sched_out(struct task_atoms *atoms, |
ea92ed5a | 965 | struct trace_switch_event *switch_event __used, u64 delta) |
cdce9d73 | 966 | { |
17562205 | 967 | struct work_atom *snapshot; |
cdce9d73 | 968 | |
cdce9d73 FW |
969 | snapshot = calloc(sizeof(*snapshot), 1); |
970 | if (!snapshot) | |
971 | die("Non memory"); | |
972 | ||
ea92ed5a | 973 | snapshot->runtime = delta; |
17562205 | 974 | list_add_tail(&snapshot->list, &atoms->snapshot_list); |
cdce9d73 FW |
975 | } |
976 | ||
977 | static void | |
17562205 | 978 | lat_sched_in(struct task_atoms *atoms, u64 timestamp) |
cdce9d73 | 979 | { |
17562205 | 980 | struct work_atom *snapshot; |
cdce9d73 | 981 | |
17562205 | 982 | if (list_empty(&atoms->snapshot_list)) |
cdce9d73 FW |
983 | return; |
984 | ||
17562205 | 985 | snapshot = list_entry(atoms->snapshot_list.prev, struct work_atom, |
cdce9d73 FW |
986 | list); |
987 | ||
988 | if (snapshot->state != THREAD_WAKED_UP) | |
989 | return; | |
990 | ||
991 | if (timestamp < snapshot->wake_up_time) { | |
992 | snapshot->state = THREAD_IGNORE; | |
993 | return; | |
994 | } | |
995 | ||
996 | snapshot->state = THREAD_SCHED_IN; | |
997 | snapshot->sched_in_time = timestamp; | |
998 | } | |
999 | ||
cdce9d73 FW |
1000 | static void |
1001 | latency_switch_event(struct trace_switch_event *switch_event, | |
1002 | struct event *event __used, | |
ea92ed5a | 1003 | int cpu, |
cdce9d73 FW |
1004 | u64 timestamp, |
1005 | struct thread *thread __used) | |
1006 | { | |
17562205 | 1007 | struct task_atoms *out_atoms, *in_atoms; |
cdce9d73 | 1008 | struct thread *sched_out, *sched_in; |
ea92ed5a IM |
1009 | u64 timestamp0; |
1010 | s64 delta; | |
1011 | ||
1012 | if (cpu >= MAX_CPUS || cpu < 0) | |
1013 | return; | |
1014 | ||
1015 | timestamp0 = cpu_last_switched[cpu]; | |
1016 | cpu_last_switched[cpu] = timestamp; | |
1017 | if (timestamp0) | |
1018 | delta = timestamp - timestamp0; | |
1019 | else | |
1020 | delta = 0; | |
1021 | ||
1022 | if (delta < 0) | |
1023 | die("hm, delta: %Ld < 0 ?\n", delta); | |
1024 | ||
cdce9d73 FW |
1025 | |
1026 | sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match); | |
1027 | sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match); | |
1028 | ||
17562205 FW |
1029 | in_atoms = thread_atom_list_search(&lat_snapshot_root, sched_in); |
1030 | if (!in_atoms) { | |
1031 | thread_atom_list_insert(sched_in); | |
1032 | in_atoms = thread_atom_list_search(&lat_snapshot_root, sched_in); | |
1033 | if (!in_atoms) | |
cdce9d73 FW |
1034 | die("Internal latency tree error"); |
1035 | } | |
1036 | ||
17562205 FW |
1037 | out_atoms = thread_atom_list_search(&lat_snapshot_root, sched_out); |
1038 | if (!out_atoms) { | |
1039 | thread_atom_list_insert(sched_out); | |
1040 | out_atoms = thread_atom_list_search(&lat_snapshot_root, sched_out); | |
1041 | if (!out_atoms) | |
cdce9d73 FW |
1042 | die("Internal latency tree error"); |
1043 | } | |
1044 | ||
17562205 FW |
1045 | lat_sched_in(in_atoms, timestamp); |
1046 | lat_sched_out(out_atoms, switch_event, delta); | |
cdce9d73 FW |
1047 | } |
1048 | ||
1049 | static void | |
1050 | latency_wakeup_event(struct trace_wakeup_event *wakeup_event, | |
1051 | struct event *event __used, | |
1052 | int cpu __used, | |
1053 | u64 timestamp, | |
1054 | struct thread *thread __used) | |
1055 | { | |
17562205 FW |
1056 | struct task_atoms *atoms; |
1057 | struct work_atom *snapshot; | |
cdce9d73 FW |
1058 | struct thread *wakee; |
1059 | ||
1060 | /* Note for later, it may be interesting to observe the failing cases */ | |
1061 | if (!wakeup_event->success) | |
1062 | return; | |
1063 | ||
1064 | wakee = threads__findnew(wakeup_event->pid, &threads, &last_match); | |
17562205 FW |
1065 | atoms = thread_atom_list_search(&lat_snapshot_root, wakee); |
1066 | if (!atoms) { | |
1067 | thread_atom_list_insert(wakee); | |
cdce9d73 FW |
1068 | return; |
1069 | } | |
1070 | ||
17562205 | 1071 | if (list_empty(&atoms->snapshot_list)) |
cdce9d73 FW |
1072 | return; |
1073 | ||
17562205 | 1074 | snapshot = list_entry(atoms->snapshot_list.prev, struct work_atom, |
cdce9d73 FW |
1075 | list); |
1076 | ||
1077 | if (snapshot->state != THREAD_SLEEPING) | |
1078 | return; | |
1079 | ||
1080 | snapshot->state = THREAD_WAKED_UP; | |
1081 | snapshot->wake_up_time = timestamp; | |
1082 | } | |
1083 | ||
1084 | static struct trace_sched_handler lat_ops = { | |
ea92ed5a IM |
1085 | .wakeup_event = latency_wakeup_event, |
1086 | .switch_event = latency_switch_event, | |
1087 | .fork_event = latency_fork_event, | |
cdce9d73 FW |
1088 | }; |
1089 | ||
3e304147 IM |
1090 | static u64 all_runtime; |
1091 | static u64 all_count; | |
1092 | ||
17562205 | 1093 | static void output_lat_thread(struct task_atoms *atom_list) |
cdce9d73 | 1094 | { |
17562205 | 1095 | struct work_atom *atom; |
cdce9d73 FW |
1096 | int count = 0; |
1097 | int i; | |
1098 | int ret; | |
1099 | u64 max = 0, avg; | |
1100 | u64 total = 0, delta; | |
ea92ed5a | 1101 | u64 total_runtime = 0; |
cdce9d73 | 1102 | |
17562205 FW |
1103 | list_for_each_entry(atom, &atom_list->snapshot_list, list) { |
1104 | total_runtime += atom->runtime; | |
ea92ed5a | 1105 | |
17562205 | 1106 | if (atom->state != THREAD_SCHED_IN) |
cdce9d73 FW |
1107 | continue; |
1108 | ||
1109 | count++; | |
1110 | ||
17562205 | 1111 | delta = atom->sched_in_time - atom->wake_up_time; |
cdce9d73 FW |
1112 | if (delta > max) |
1113 | max = delta; | |
1114 | total += delta; | |
1115 | } | |
1116 | ||
3e304147 IM |
1117 | all_runtime += total_runtime; |
1118 | all_count += count; | |
1119 | ||
cdce9d73 FW |
1120 | if (!count) |
1121 | return; | |
1122 | ||
17562205 | 1123 | ret = printf(" %s ", atom_list->thread->comm); |
cdce9d73 | 1124 | |
d9340c1d | 1125 | for (i = 0; i < 19 - ret; i++) |
cdce9d73 FW |
1126 | printf(" "); |
1127 | ||
1128 | avg = total / count; | |
1129 | ||
d9340c1d | 1130 | printf("|%9.3f ms |%9d | avg:%9.3f ms | max:%9.3f ms |\n", |
ea92ed5a | 1131 | (double)total_runtime/1e9, count, (double)avg/1e9, (double)max/1e9); |
cdce9d73 FW |
1132 | } |
1133 | ||
46f392c9 | 1134 | static void __cmd_lat(void) |
cdce9d73 FW |
1135 | { |
1136 | struct rb_node *next; | |
1137 | ||
46f392c9 IM |
1138 | setup_pager(); |
1139 | read_events(); | |
1140 | ||
d9340c1d | 1141 | printf("-----------------------------------------------------------------------------------\n"); |
3e304147 | 1142 | printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n"); |
d9340c1d | 1143 | printf("-----------------------------------------------------------------------------------\n"); |
cdce9d73 FW |
1144 | |
1145 | next = rb_first(&lat_snapshot_root); | |
1146 | ||
1147 | while (next) { | |
17562205 | 1148 | struct task_atoms *atom_list; |
cdce9d73 | 1149 | |
17562205 FW |
1150 | atom_list = rb_entry(next, struct task_atoms, node); |
1151 | output_lat_thread(atom_list); | |
cdce9d73 FW |
1152 | next = rb_next(next); |
1153 | } | |
d9340c1d IM |
1154 | |
1155 | printf("-----------------------------------------------------------------------------------\n"); | |
3e304147 IM |
1156 | printf(" TOTAL: |%9.3f ms |%9Ld |\n", |
1157 | (double)all_runtime/1e9, all_count); | |
1158 | printf("---------------------------------------------\n"); | |
cdce9d73 | 1159 | } |
419ab0d6 FW |
1160 | |
1161 | static struct trace_sched_handler *trace_handler; | |
1162 | ||
fbf94829 | 1163 | static void |
419ab0d6 FW |
1164 | process_sched_wakeup_event(struct raw_event_sample *raw, |
1165 | struct event *event, | |
1166 | int cpu __used, | |
1167 | u64 timestamp __used, | |
1168 | struct thread *thread __used) | |
1169 | { | |
1170 | struct trace_wakeup_event wakeup_event; | |
1171 | ||
1172 | FILL_COMMON_FIELDS(wakeup_event, event, raw->data); | |
1173 | ||
1174 | FILL_ARRAY(wakeup_event, comm, event, raw->data); | |
1175 | FILL_FIELD(wakeup_event, pid, event, raw->data); | |
1176 | FILL_FIELD(wakeup_event, prio, event, raw->data); | |
1177 | FILL_FIELD(wakeup_event, success, event, raw->data); | |
1178 | FILL_FIELD(wakeup_event, cpu, event, raw->data); | |
1179 | ||
1180 | trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread); | |
1181 | } | |
1182 | ||
1183 | static void | |
1184 | process_sched_switch_event(struct raw_event_sample *raw, | |
1185 | struct event *event, | |
1186 | int cpu __used, | |
1187 | u64 timestamp __used, | |
1188 | struct thread *thread __used) | |
1189 | { | |
1190 | struct trace_switch_event switch_event; | |
1191 | ||
1192 | FILL_COMMON_FIELDS(switch_event, event, raw->data); | |
1193 | ||
1194 | FILL_ARRAY(switch_event, prev_comm, event, raw->data); | |
1195 | FILL_FIELD(switch_event, prev_pid, event, raw->data); | |
1196 | FILL_FIELD(switch_event, prev_prio, event, raw->data); | |
1197 | FILL_FIELD(switch_event, prev_state, event, raw->data); | |
1198 | FILL_ARRAY(switch_event, next_comm, event, raw->data); | |
1199 | FILL_FIELD(switch_event, next_pid, event, raw->data); | |
1200 | FILL_FIELD(switch_event, next_prio, event, raw->data); | |
1201 | ||
1202 | trace_handler->switch_event(&switch_event, event, cpu, timestamp, thread); | |
1203 | } | |
1204 | ||
1205 | static void | |
1206 | process_sched_fork_event(struct raw_event_sample *raw, | |
1207 | struct event *event, | |
1208 | int cpu __used, | |
1209 | u64 timestamp __used, | |
1210 | struct thread *thread __used) | |
fbf94829 | 1211 | { |
46538818 FW |
1212 | struct trace_fork_event fork_event; |
1213 | ||
1214 | FILL_COMMON_FIELDS(fork_event, event, raw->data); | |
1215 | ||
1216 | FILL_ARRAY(fork_event, parent_comm, event, raw->data); | |
1217 | FILL_FIELD(fork_event, parent_pid, event, raw->data); | |
1218 | FILL_ARRAY(fork_event, child_comm, event, raw->data); | |
1219 | FILL_FIELD(fork_event, child_pid, event, raw->data); | |
1220 | ||
419ab0d6 | 1221 | trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread); |
fbf94829 IM |
1222 | } |
1223 | ||
419ab0d6 FW |
1224 | static void |
1225 | process_sched_exit_event(struct event *event, | |
1226 | int cpu __used, | |
1227 | u64 timestamp __used, | |
1228 | struct thread *thread __used) | |
fbf94829 | 1229 | { |
ad236fd2 IM |
1230 | if (verbose) |
1231 | printf("sched_exit event %p\n", event); | |
ec156764 IM |
1232 | } |
1233 | ||
1234 | static void | |
ad236fd2 | 1235 | process_raw_event(event_t *raw_event __used, void *more_data, |
ec156764 IM |
1236 | int cpu, u64 timestamp, struct thread *thread) |
1237 | { | |
46538818 | 1238 | struct raw_event_sample *raw = more_data; |
ec156764 IM |
1239 | struct event *event; |
1240 | int type; | |
1241 | ||
1242 | type = trace_parse_common_type(raw->data); | |
1243 | event = trace_find_event(type); | |
1244 | ||
ec156764 | 1245 | if (!strcmp(event->name, "sched_switch")) |
46538818 | 1246 | process_sched_switch_event(raw, event, cpu, timestamp, thread); |
ec156764 | 1247 | if (!strcmp(event->name, "sched_wakeup")) |
46538818 | 1248 | process_sched_wakeup_event(raw, event, cpu, timestamp, thread); |
fbf94829 | 1249 | if (!strcmp(event->name, "sched_wakeup_new")) |
46538818 | 1250 | process_sched_wakeup_event(raw, event, cpu, timestamp, thread); |
fbf94829 | 1251 | if (!strcmp(event->name, "sched_process_fork")) |
46538818 | 1252 | process_sched_fork_event(raw, event, cpu, timestamp, thread); |
fbf94829 IM |
1253 | if (!strcmp(event->name, "sched_process_exit")) |
1254 | process_sched_exit_event(event, cpu, timestamp, thread); | |
ec156764 IM |
1255 | } |
1256 | ||
0a02ad93 IM |
1257 | static int |
1258 | process_sample_event(event_t *event, unsigned long offset, unsigned long head) | |
1259 | { | |
1260 | char level; | |
1261 | int show = 0; | |
1262 | struct dso *dso = NULL; | |
1263 | struct thread *thread; | |
1264 | u64 ip = event->ip.ip; | |
1265 | u64 timestamp = -1; | |
1266 | u32 cpu = -1; | |
1267 | u64 period = 1; | |
1268 | void *more_data = event->ip.__more_data; | |
1269 | int cpumode; | |
1270 | ||
1271 | thread = threads__findnew(event->ip.pid, &threads, &last_match); | |
1272 | ||
1273 | if (sample_type & PERF_SAMPLE_TIME) { | |
1274 | timestamp = *(u64 *)more_data; | |
1275 | more_data += sizeof(u64); | |
1276 | } | |
1277 | ||
1278 | if (sample_type & PERF_SAMPLE_CPU) { | |
1279 | cpu = *(u32 *)more_data; | |
1280 | more_data += sizeof(u32); | |
1281 | more_data += sizeof(u32); /* reserved */ | |
1282 | } | |
1283 | ||
1284 | if (sample_type & PERF_SAMPLE_PERIOD) { | |
1285 | period = *(u64 *)more_data; | |
1286 | more_data += sizeof(u64); | |
1287 | } | |
1288 | ||
1289 | dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n", | |
1290 | (void *)(offset + head), | |
1291 | (void *)(long)(event->header.size), | |
1292 | event->header.misc, | |
1293 | event->ip.pid, event->ip.tid, | |
1294 | (void *)(long)ip, | |
1295 | (long long)period); | |
1296 | ||
1297 | dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid); | |
1298 | ||
1299 | if (thread == NULL) { | |
1300 | eprintf("problem processing %d event, skipping it.\n", | |
1301 | event->header.type); | |
1302 | return -1; | |
1303 | } | |
1304 | ||
1305 | cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK; | |
1306 | ||
1307 | if (cpumode == PERF_EVENT_MISC_KERNEL) { | |
1308 | show = SHOW_KERNEL; | |
1309 | level = 'k'; | |
1310 | ||
1311 | dso = kernel_dso; | |
1312 | ||
1313 | dump_printf(" ...... dso: %s\n", dso->name); | |
1314 | ||
1315 | } else if (cpumode == PERF_EVENT_MISC_USER) { | |
1316 | ||
1317 | show = SHOW_USER; | |
1318 | level = '.'; | |
1319 | ||
1320 | } else { | |
1321 | show = SHOW_HV; | |
1322 | level = 'H'; | |
1323 | ||
1324 | dso = hypervisor_dso; | |
1325 | ||
1326 | dump_printf(" ...... dso: [hypervisor]\n"); | |
1327 | } | |
1328 | ||
ec156764 IM |
1329 | if (sample_type & PERF_SAMPLE_RAW) |
1330 | process_raw_event(event, more_data, cpu, timestamp, thread); | |
0a02ad93 IM |
1331 | |
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | static int | |
1336 | process_event(event_t *event, unsigned long offset, unsigned long head) | |
1337 | { | |
1338 | trace_event(event); | |
1339 | ||
1340 | switch (event->header.type) { | |
1341 | case PERF_EVENT_MMAP ... PERF_EVENT_LOST: | |
1342 | return 0; | |
1343 | ||
1344 | case PERF_EVENT_COMM: | |
1345 | return process_comm_event(event, offset, head); | |
1346 | ||
1347 | case PERF_EVENT_EXIT ... PERF_EVENT_READ: | |
1348 | return 0; | |
1349 | ||
1350 | case PERF_EVENT_SAMPLE: | |
1351 | return process_sample_event(event, offset, head); | |
1352 | ||
1353 | case PERF_EVENT_MAX: | |
1354 | default: | |
1355 | return -1; | |
1356 | } | |
1357 | ||
1358 | return 0; | |
1359 | } | |
1360 | ||
46f392c9 | 1361 | static int read_events(void) |
0a02ad93 IM |
1362 | { |
1363 | int ret, rc = EXIT_FAILURE; | |
1364 | unsigned long offset = 0; | |
1365 | unsigned long head = 0; | |
1366 | struct stat perf_stat; | |
1367 | event_t *event; | |
1368 | uint32_t size; | |
1369 | char *buf; | |
1370 | ||
1371 | trace_report(); | |
1372 | register_idle_thread(&threads, &last_match); | |
1373 | ||
1374 | input = open(input_name, O_RDONLY); | |
1375 | if (input < 0) { | |
1376 | perror("failed to open file"); | |
1377 | exit(-1); | |
1378 | } | |
1379 | ||
1380 | ret = fstat(input, &perf_stat); | |
1381 | if (ret < 0) { | |
1382 | perror("failed to stat file"); | |
1383 | exit(-1); | |
1384 | } | |
1385 | ||
1386 | if (!perf_stat.st_size) { | |
1387 | fprintf(stderr, "zero-sized file, nothing to do!\n"); | |
1388 | exit(0); | |
1389 | } | |
1390 | header = perf_header__read(input); | |
1391 | head = header->data_offset; | |
1392 | sample_type = perf_header__sample_type(header); | |
1393 | ||
1394 | if (!(sample_type & PERF_SAMPLE_RAW)) | |
1395 | die("No trace sample to read. Did you call perf record " | |
1396 | "without -R?"); | |
1397 | ||
1398 | if (load_kernel() < 0) { | |
1399 | perror("failed to load kernel symbols"); | |
1400 | return EXIT_FAILURE; | |
1401 | } | |
1402 | ||
1403 | remap: | |
1404 | buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ, | |
1405 | MAP_SHARED, input, offset); | |
1406 | if (buf == MAP_FAILED) { | |
1407 | perror("failed to mmap file"); | |
1408 | exit(-1); | |
1409 | } | |
1410 | ||
1411 | more: | |
1412 | event = (event_t *)(buf + head); | |
1413 | ||
1414 | size = event->header.size; | |
1415 | if (!size) | |
1416 | size = 8; | |
1417 | ||
1418 | if (head + event->header.size >= page_size * mmap_window) { | |
1419 | unsigned long shift = page_size * (head / page_size); | |
1420 | int res; | |
1421 | ||
1422 | res = munmap(buf, page_size * mmap_window); | |
1423 | assert(res == 0); | |
1424 | ||
1425 | offset += shift; | |
1426 | head -= shift; | |
1427 | goto remap; | |
1428 | } | |
1429 | ||
1430 | size = event->header.size; | |
1431 | ||
1432 | ||
1433 | if (!size || process_event(event, offset, head) < 0) { | |
1434 | ||
1435 | /* | |
1436 | * assume we lost track of the stream, check alignment, and | |
1437 | * increment a single u64 in the hope to catch on again 'soon'. | |
1438 | */ | |
1439 | ||
1440 | if (unlikely(head & 7)) | |
1441 | head &= ~7ULL; | |
1442 | ||
1443 | size = 8; | |
1444 | } | |
1445 | ||
1446 | head += size; | |
1447 | ||
1448 | if (offset + head < (unsigned long)perf_stat.st_size) | |
1449 | goto more; | |
1450 | ||
1451 | rc = EXIT_SUCCESS; | |
1452 | close(input); | |
1453 | ||
1454 | return rc; | |
1455 | } | |
1456 | ||
46f392c9 IM |
1457 | static const char * const sched_usage[] = { |
1458 | "perf sched [<options>] <command>", | |
0a02ad93 IM |
1459 | NULL |
1460 | }; | |
1461 | ||
1462 | static const struct option options[] = { | |
1463 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, | |
1464 | "dump raw trace in ASCII"), | |
419ab0d6 FW |
1465 | OPT_BOOLEAN('r', "replay", &replay_mode, |
1466 | "replay sched behaviour from traces"), | |
cdce9d73 FW |
1467 | OPT_BOOLEAN('l', "latency", &lat_mode, |
1468 | "measure various latencies"), | |
0a02ad93 IM |
1469 | OPT_BOOLEAN('v', "verbose", &verbose, |
1470 | "be more verbose (show symbol address, etc)"), | |
1471 | OPT_END() | |
1472 | }; | |
1473 | ||
1474 | int cmd_sched(int argc, const char **argv, const char *prefix __used) | |
1475 | { | |
1476 | symbol__init(); | |
1477 | page_size = getpagesize(); | |
1478 | ||
46f392c9 | 1479 | argc = parse_options(argc, argv, options, sched_usage, 0); |
0a02ad93 IM |
1480 | if (argc) { |
1481 | /* | |
1482 | * Special case: if there's an argument left then assume tha | |
1483 | * it's a symbol filter: | |
1484 | */ | |
1485 | if (argc > 1) | |
46f392c9 | 1486 | usage_with_options(sched_usage, options); |
0a02ad93 IM |
1487 | } |
1488 | ||
419ab0d6 FW |
1489 | if (replay_mode) |
1490 | trace_handler = &replay_ops; | |
cdce9d73 FW |
1491 | else if (lat_mode) |
1492 | trace_handler = &lat_ops; | |
46f392c9 IM |
1493 | else |
1494 | usage_with_options(sched_usage, options); | |
1495 | ||
1496 | if (replay_mode) | |
1497 | __cmd_replay(); | |
1498 | else if (lat_mode) | |
1499 | __cmd_lat(); | |
ec156764 IM |
1500 | |
1501 | return 0; | |
0a02ad93 | 1502 | } |