Commit | Line | Data |
---|---|---|
0a02ad93 | 1 | #include "builtin.h" |
b1ffe8f3 | 2 | #include "perf.h" |
0a02ad93 IM |
3 | |
4 | #include "util/util.h" | |
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" |
0a02ad93 IM |
13 | |
14 | #include "util/parse-options.h" | |
b1ffe8f3 | 15 | #include "util/trace-event.h" |
0a02ad93 | 16 | |
0a02ad93 IM |
17 | #include "util/debug.h" |
18 | ||
b1ffe8f3 | 19 | #include <sys/prctl.h> |
7b78f136 | 20 | #include <sys/resource.h> |
0a02ad93 | 21 | |
b1ffe8f3 IM |
22 | #include <semaphore.h> |
23 | #include <pthread.h> | |
24 | #include <math.h> | |
419ab0d6 | 25 | |
b1ffe8f3 IM |
26 | #define PR_SET_NAME 15 /* Set process name */ |
27 | #define MAX_CPUS 4096 | |
b1ffe8f3 IM |
28 | #define COMM_LEN 20 |
29 | #define SYM_LEN 129 | |
b1ffe8f3 | 30 | #define MAX_PID 65536 |
ec156764 | 31 | |
39aeb52f | 32 | struct sched_atom; |
ec156764 | 33 | |
b1ffe8f3 IM |
34 | struct task_desc { |
35 | unsigned long nr; | |
36 | unsigned long pid; | |
37 | char comm[COMM_LEN]; | |
ec156764 | 38 | |
b1ffe8f3 IM |
39 | unsigned long nr_events; |
40 | unsigned long curr_event; | |
39aeb52f | 41 | struct sched_atom **atoms; |
b1ffe8f3 IM |
42 | |
43 | pthread_t thread; | |
44 | sem_t sleep_sem; | |
ec156764 | 45 | |
b1ffe8f3 IM |
46 | sem_t ready_for_work; |
47 | sem_t work_done_sem; | |
48 | ||
49 | u64 cpu_usage; | |
50 | }; | |
51 | ||
52 | enum sched_event_type { | |
53 | SCHED_EVENT_RUN, | |
54 | SCHED_EVENT_SLEEP, | |
55 | SCHED_EVENT_WAKEUP, | |
55ffb7a6 | 56 | SCHED_EVENT_MIGRATION, |
b1ffe8f3 IM |
57 | }; |
58 | ||
39aeb52f | 59 | struct sched_atom { |
b1ffe8f3 | 60 | enum sched_event_type type; |
eed05fe7 | 61 | int specific_wait; |
b1ffe8f3 IM |
62 | u64 timestamp; |
63 | u64 duration; | |
64 | unsigned long nr; | |
b1ffe8f3 IM |
65 | sem_t *wait_sem; |
66 | struct task_desc *wakee; | |
67 | }; | |
68 | ||
b1ffe8f3 IM |
69 | #define TASK_STATE_TO_CHAR_STR "RSDTtZX" |
70 | ||
71 | enum thread_state { | |
72 | THREAD_SLEEPING = 0, | |
73 | THREAD_WAIT_CPU, | |
74 | THREAD_SCHED_IN, | |
75 | THREAD_IGNORE | |
76 | }; | |
77 | ||
78 | struct work_atom { | |
79 | struct list_head list; | |
80 | enum thread_state state; | |
aa1ab9d2 | 81 | u64 sched_out_time; |
b1ffe8f3 IM |
82 | u64 wake_up_time; |
83 | u64 sched_in_time; | |
84 | u64 runtime; | |
85 | }; | |
86 | ||
39aeb52f | 87 | struct work_atoms { |
88 | struct list_head work_list; | |
b1ffe8f3 IM |
89 | struct thread *thread; |
90 | struct rb_node node; | |
91 | u64 max_lat; | |
3786310a | 92 | u64 max_lat_at; |
b1ffe8f3 IM |
93 | u64 total_lat; |
94 | u64 nb_atoms; | |
95 | u64 total_runtime; | |
96 | }; | |
97 | ||
39aeb52f | 98 | typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *); |
b1ffe8f3 | 99 | |
9ec3f4e4 | 100 | struct perf_sched; |
0e9b07e5 | 101 | |
9ec3f4e4 ACM |
102 | struct trace_sched_handler { |
103 | int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel, | |
104 | struct perf_sample *sample, struct machine *machine); | |
0e9b07e5 | 105 | |
9ec3f4e4 ACM |
106 | int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel, |
107 | struct perf_sample *sample, struct machine *machine); | |
0e9b07e5 | 108 | |
9ec3f4e4 ACM |
109 | int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel, |
110 | struct perf_sample *sample, struct machine *machine); | |
0e9b07e5 | 111 | |
cb627505 DA |
112 | /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */ |
113 | int (*fork_event)(struct perf_sched *sched, union perf_event *event, | |
114 | struct machine *machine); | |
0e9b07e5 ACM |
115 | |
116 | int (*migrate_task_event)(struct perf_sched *sched, | |
9ec3f4e4 ACM |
117 | struct perf_evsel *evsel, |
118 | struct perf_sample *sample, | |
119 | struct machine *machine); | |
0e9b07e5 ACM |
120 | }; |
121 | ||
122 | struct perf_sched { | |
123 | struct perf_tool tool; | |
0e9b07e5 ACM |
124 | const char *sort_order; |
125 | unsigned long nr_tasks; | |
126 | struct task_desc *pid_to_task[MAX_PID]; | |
127 | struct task_desc **tasks; | |
128 | const struct trace_sched_handler *tp_handler; | |
129 | pthread_mutex_t start_work_mutex; | |
130 | pthread_mutex_t work_done_wait_mutex; | |
131 | int profile_cpu; | |
132 | /* | |
133 | * Track the current task - that way we can know whether there's any | |
134 | * weird events, such as a task being switched away that is not current. | |
135 | */ | |
136 | int max_cpu; | |
137 | u32 curr_pid[MAX_CPUS]; | |
138 | struct thread *curr_thread[MAX_CPUS]; | |
139 | char next_shortname1; | |
140 | char next_shortname2; | |
141 | unsigned int replay_repeat; | |
142 | unsigned long nr_run_events; | |
143 | unsigned long nr_sleep_events; | |
144 | unsigned long nr_wakeup_events; | |
145 | unsigned long nr_sleep_corrections; | |
146 | unsigned long nr_run_events_optimized; | |
147 | unsigned long targetless_wakeups; | |
148 | unsigned long multitarget_wakeups; | |
149 | unsigned long nr_runs; | |
150 | unsigned long nr_timestamps; | |
151 | unsigned long nr_unordered_timestamps; | |
152 | unsigned long nr_state_machine_bugs; | |
153 | unsigned long nr_context_switch_bugs; | |
154 | unsigned long nr_events; | |
155 | unsigned long nr_lost_chunks; | |
156 | unsigned long nr_lost_events; | |
157 | u64 run_measurement_overhead; | |
158 | u64 sleep_measurement_overhead; | |
159 | u64 start_time; | |
160 | u64 cpu_usage; | |
161 | u64 runavg_cpu_usage; | |
162 | u64 parent_cpu_usage; | |
163 | u64 runavg_parent_cpu_usage; | |
164 | u64 sum_runtime; | |
165 | u64 sum_fluct; | |
166 | u64 run_avg; | |
167 | u64 all_runtime; | |
168 | u64 all_count; | |
169 | u64 cpu_last_switched[MAX_CPUS]; | |
170 | struct rb_root atom_root, sorted_atom_root; | |
171 | struct list_head sort_list, cmp_pid; | |
172 | }; | |
b1ffe8f3 IM |
173 | |
174 | static u64 get_nsecs(void) | |
ec156764 IM |
175 | { |
176 | struct timespec ts; | |
177 | ||
178 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
179 | ||
180 | return ts.tv_sec * 1000000000ULL + ts.tv_nsec; | |
181 | } | |
182 | ||
0e9b07e5 | 183 | static void burn_nsecs(struct perf_sched *sched, u64 nsecs) |
ec156764 | 184 | { |
b1ffe8f3 | 185 | u64 T0 = get_nsecs(), T1; |
ec156764 IM |
186 | |
187 | do { | |
188 | T1 = get_nsecs(); | |
0e9b07e5 | 189 | } while (T1 + sched->run_measurement_overhead < T0 + nsecs); |
ec156764 IM |
190 | } |
191 | ||
b1ffe8f3 | 192 | static void sleep_nsecs(u64 nsecs) |
ec156764 IM |
193 | { |
194 | struct timespec ts; | |
195 | ||
196 | ts.tv_nsec = nsecs % 999999999; | |
197 | ts.tv_sec = nsecs / 999999999; | |
198 | ||
199 | nanosleep(&ts, NULL); | |
200 | } | |
201 | ||
0e9b07e5 | 202 | static void calibrate_run_measurement_overhead(struct perf_sched *sched) |
ec156764 | 203 | { |
b1ffe8f3 | 204 | u64 T0, T1, delta, min_delta = 1000000000ULL; |
ec156764 IM |
205 | int i; |
206 | ||
207 | for (i = 0; i < 10; i++) { | |
208 | T0 = get_nsecs(); | |
0e9b07e5 | 209 | burn_nsecs(sched, 0); |
ec156764 IM |
210 | T1 = get_nsecs(); |
211 | delta = T1-T0; | |
212 | min_delta = min(min_delta, delta); | |
213 | } | |
0e9b07e5 | 214 | sched->run_measurement_overhead = min_delta; |
ec156764 | 215 | |
9486aa38 | 216 | printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta); |
ec156764 IM |
217 | } |
218 | ||
0e9b07e5 | 219 | static void calibrate_sleep_measurement_overhead(struct perf_sched *sched) |
ec156764 | 220 | { |
b1ffe8f3 | 221 | u64 T0, T1, delta, min_delta = 1000000000ULL; |
ec156764 IM |
222 | int i; |
223 | ||
224 | for (i = 0; i < 10; i++) { | |
225 | T0 = get_nsecs(); | |
226 | sleep_nsecs(10000); | |
227 | T1 = get_nsecs(); | |
228 | delta = T1-T0; | |
229 | min_delta = min(min_delta, delta); | |
230 | } | |
231 | min_delta -= 10000; | |
0e9b07e5 | 232 | sched->sleep_measurement_overhead = min_delta; |
ec156764 | 233 | |
9486aa38 | 234 | printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta); |
ec156764 IM |
235 | } |
236 | ||
39aeb52f | 237 | static struct sched_atom * |
b1ffe8f3 | 238 | get_new_event(struct task_desc *task, u64 timestamp) |
ec156764 | 239 | { |
36479484 | 240 | struct sched_atom *event = zalloc(sizeof(*event)); |
ec156764 IM |
241 | unsigned long idx = task->nr_events; |
242 | size_t size; | |
243 | ||
244 | event->timestamp = timestamp; | |
245 | event->nr = idx; | |
246 | ||
247 | task->nr_events++; | |
39aeb52f | 248 | size = sizeof(struct sched_atom *) * task->nr_events; |
249 | task->atoms = realloc(task->atoms, size); | |
250 | BUG_ON(!task->atoms); | |
ec156764 | 251 | |
39aeb52f | 252 | task->atoms[idx] = event; |
ec156764 IM |
253 | |
254 | return event; | |
255 | } | |
256 | ||
39aeb52f | 257 | static struct sched_atom *last_event(struct task_desc *task) |
ec156764 IM |
258 | { |
259 | if (!task->nr_events) | |
260 | return NULL; | |
261 | ||
39aeb52f | 262 | return task->atoms[task->nr_events - 1]; |
ec156764 IM |
263 | } |
264 | ||
0e9b07e5 ACM |
265 | static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task, |
266 | u64 timestamp, u64 duration) | |
ec156764 | 267 | { |
39aeb52f | 268 | struct sched_atom *event, *curr_event = last_event(task); |
ec156764 IM |
269 | |
270 | /* | |
fbf94829 IM |
271 | * optimize an existing RUN event by merging this one |
272 | * to it: | |
273 | */ | |
ec156764 | 274 | if (curr_event && curr_event->type == SCHED_EVENT_RUN) { |
0e9b07e5 | 275 | sched->nr_run_events_optimized++; |
ec156764 IM |
276 | curr_event->duration += duration; |
277 | return; | |
278 | } | |
279 | ||
280 | event = get_new_event(task, timestamp); | |
281 | ||
282 | event->type = SCHED_EVENT_RUN; | |
283 | event->duration = duration; | |
284 | ||
0e9b07e5 | 285 | sched->nr_run_events++; |
ec156764 IM |
286 | } |
287 | ||
0e9b07e5 ACM |
288 | static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task, |
289 | u64 timestamp, struct task_desc *wakee) | |
ec156764 | 290 | { |
39aeb52f | 291 | struct sched_atom *event, *wakee_event; |
ec156764 IM |
292 | |
293 | event = get_new_event(task, timestamp); | |
294 | event->type = SCHED_EVENT_WAKEUP; | |
295 | event->wakee = wakee; | |
296 | ||
297 | wakee_event = last_event(wakee); | |
298 | if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) { | |
0e9b07e5 | 299 | sched->targetless_wakeups++; |
ec156764 IM |
300 | return; |
301 | } | |
302 | if (wakee_event->wait_sem) { | |
0e9b07e5 | 303 | sched->multitarget_wakeups++; |
ec156764 IM |
304 | return; |
305 | } | |
306 | ||
36479484 | 307 | wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem)); |
ec156764 IM |
308 | sem_init(wakee_event->wait_sem, 0, 0); |
309 | wakee_event->specific_wait = 1; | |
310 | event->wait_sem = wakee_event->wait_sem; | |
311 | ||
0e9b07e5 | 312 | sched->nr_wakeup_events++; |
ec156764 IM |
313 | } |
314 | ||
0e9b07e5 ACM |
315 | static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task, |
316 | u64 timestamp, u64 task_state __maybe_unused) | |
ec156764 | 317 | { |
39aeb52f | 318 | struct sched_atom *event = get_new_event(task, timestamp); |
ec156764 IM |
319 | |
320 | event->type = SCHED_EVENT_SLEEP; | |
321 | ||
0e9b07e5 | 322 | sched->nr_sleep_events++; |
ec156764 IM |
323 | } |
324 | ||
0e9b07e5 ACM |
325 | static struct task_desc *register_pid(struct perf_sched *sched, |
326 | unsigned long pid, const char *comm) | |
ec156764 IM |
327 | { |
328 | struct task_desc *task; | |
329 | ||
330 | BUG_ON(pid >= MAX_PID); | |
331 | ||
0e9b07e5 | 332 | task = sched->pid_to_task[pid]; |
ec156764 IM |
333 | |
334 | if (task) | |
335 | return task; | |
336 | ||
36479484 | 337 | task = zalloc(sizeof(*task)); |
ec156764 | 338 | task->pid = pid; |
0e9b07e5 | 339 | task->nr = sched->nr_tasks; |
ec156764 IM |
340 | strcpy(task->comm, comm); |
341 | /* | |
342 | * every task starts in sleeping state - this gets ignored | |
343 | * if there's no wakeup pointing to this sleep state: | |
344 | */ | |
0e9b07e5 | 345 | add_sched_event_sleep(sched, task, 0, 0); |
ec156764 | 346 | |
0e9b07e5 ACM |
347 | sched->pid_to_task[pid] = task; |
348 | sched->nr_tasks++; | |
349 | sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_task *)); | |
350 | BUG_ON(!sched->tasks); | |
351 | sched->tasks[task->nr] = task; | |
ec156764 | 352 | |
ad236fd2 | 353 | if (verbose) |
0e9b07e5 | 354 | printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm); |
ec156764 IM |
355 | |
356 | return task; | |
357 | } | |
358 | ||
359 | ||
0e9b07e5 | 360 | static void print_task_traces(struct perf_sched *sched) |
ec156764 IM |
361 | { |
362 | struct task_desc *task; | |
363 | unsigned long i; | |
364 | ||
0e9b07e5 ACM |
365 | for (i = 0; i < sched->nr_tasks; i++) { |
366 | task = sched->tasks[i]; | |
ad236fd2 | 367 | printf("task %6ld (%20s:%10ld), nr_events: %ld\n", |
ec156764 IM |
368 | task->nr, task->comm, task->pid, task->nr_events); |
369 | } | |
370 | } | |
371 | ||
0e9b07e5 | 372 | static void add_cross_task_wakeups(struct perf_sched *sched) |
ec156764 IM |
373 | { |
374 | struct task_desc *task1, *task2; | |
375 | unsigned long i, j; | |
376 | ||
0e9b07e5 ACM |
377 | for (i = 0; i < sched->nr_tasks; i++) { |
378 | task1 = sched->tasks[i]; | |
ec156764 | 379 | j = i + 1; |
0e9b07e5 | 380 | if (j == sched->nr_tasks) |
ec156764 | 381 | j = 0; |
0e9b07e5 ACM |
382 | task2 = sched->tasks[j]; |
383 | add_sched_event_wakeup(sched, task1, 0, task2); | |
ec156764 IM |
384 | } |
385 | } | |
386 | ||
0e9b07e5 ACM |
387 | static void perf_sched__process_event(struct perf_sched *sched, |
388 | struct sched_atom *atom) | |
ec156764 IM |
389 | { |
390 | int ret = 0; | |
ec156764 | 391 | |
39aeb52f | 392 | switch (atom->type) { |
ec156764 | 393 | case SCHED_EVENT_RUN: |
0e9b07e5 | 394 | burn_nsecs(sched, atom->duration); |
ec156764 IM |
395 | break; |
396 | case SCHED_EVENT_SLEEP: | |
39aeb52f | 397 | if (atom->wait_sem) |
398 | ret = sem_wait(atom->wait_sem); | |
ec156764 IM |
399 | BUG_ON(ret); |
400 | break; | |
401 | case SCHED_EVENT_WAKEUP: | |
39aeb52f | 402 | if (atom->wait_sem) |
403 | ret = sem_post(atom->wait_sem); | |
ec156764 IM |
404 | BUG_ON(ret); |
405 | break; | |
55ffb7a6 MG |
406 | case SCHED_EVENT_MIGRATION: |
407 | break; | |
ec156764 IM |
408 | default: |
409 | BUG_ON(1); | |
410 | } | |
411 | } | |
412 | ||
b1ffe8f3 | 413 | static u64 get_cpu_usage_nsec_parent(void) |
ec156764 IM |
414 | { |
415 | struct rusage ru; | |
b1ffe8f3 | 416 | u64 sum; |
ec156764 IM |
417 | int err; |
418 | ||
419 | err = getrusage(RUSAGE_SELF, &ru); | |
420 | BUG_ON(err); | |
421 | ||
422 | sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3; | |
423 | sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3; | |
424 | ||
425 | return sum; | |
426 | } | |
427 | ||
c0c9e721 | 428 | static int self_open_counters(void) |
ec156764 | 429 | { |
c0c9e721 XG |
430 | struct perf_event_attr attr; |
431 | int fd; | |
ec156764 | 432 | |
c0c9e721 | 433 | memset(&attr, 0, sizeof(attr)); |
ec156764 | 434 | |
c0c9e721 XG |
435 | attr.type = PERF_TYPE_SOFTWARE; |
436 | attr.config = PERF_COUNT_SW_TASK_CLOCK; | |
ec156764 | 437 | |
c0c9e721 XG |
438 | fd = sys_perf_event_open(&attr, 0, -1, -1, 0); |
439 | ||
440 | if (fd < 0) | |
60b7d14a NK |
441 | pr_err("Error: sys_perf_event_open() syscall returned " |
442 | "with %d (%s)\n", fd, strerror(errno)); | |
c0c9e721 XG |
443 | return fd; |
444 | } | |
445 | ||
446 | static u64 get_cpu_usage_nsec_self(int fd) | |
447 | { | |
448 | u64 runtime; | |
449 | int ret; | |
450 | ||
451 | ret = read(fd, &runtime, sizeof(runtime)); | |
452 | BUG_ON(ret != sizeof(runtime)); | |
453 | ||
454 | return runtime; | |
ec156764 IM |
455 | } |
456 | ||
0e9b07e5 ACM |
457 | struct sched_thread_parms { |
458 | struct task_desc *task; | |
459 | struct perf_sched *sched; | |
460 | }; | |
461 | ||
ec156764 IM |
462 | static void *thread_func(void *ctx) |
463 | { | |
0e9b07e5 ACM |
464 | struct sched_thread_parms *parms = ctx; |
465 | struct task_desc *this_task = parms->task; | |
466 | struct perf_sched *sched = parms->sched; | |
b1ffe8f3 | 467 | u64 cpu_usage_0, cpu_usage_1; |
ec156764 IM |
468 | unsigned long i, ret; |
469 | char comm2[22]; | |
c0c9e721 | 470 | int fd; |
ec156764 | 471 | |
0e9b07e5 ACM |
472 | free(parms); |
473 | ||
ec156764 IM |
474 | sprintf(comm2, ":%s", this_task->comm); |
475 | prctl(PR_SET_NAME, comm2); | |
c0c9e721 | 476 | fd = self_open_counters(); |
a116e05d ACM |
477 | if (fd < 0) |
478 | return NULL; | |
ec156764 IM |
479 | again: |
480 | ret = sem_post(&this_task->ready_for_work); | |
481 | BUG_ON(ret); | |
0e9b07e5 | 482 | ret = pthread_mutex_lock(&sched->start_work_mutex); |
ec156764 | 483 | BUG_ON(ret); |
0e9b07e5 | 484 | ret = pthread_mutex_unlock(&sched->start_work_mutex); |
ec156764 | 485 | BUG_ON(ret); |
ec156764 | 486 | |
c0c9e721 | 487 | cpu_usage_0 = get_cpu_usage_nsec_self(fd); |
ec156764 IM |
488 | |
489 | for (i = 0; i < this_task->nr_events; i++) { | |
490 | this_task->curr_event = i; | |
0e9b07e5 | 491 | perf_sched__process_event(sched, this_task->atoms[i]); |
ec156764 IM |
492 | } |
493 | ||
c0c9e721 | 494 | cpu_usage_1 = get_cpu_usage_nsec_self(fd); |
ec156764 | 495 | this_task->cpu_usage = cpu_usage_1 - cpu_usage_0; |
ec156764 IM |
496 | ret = sem_post(&this_task->work_done_sem); |
497 | BUG_ON(ret); | |
ec156764 | 498 | |
0e9b07e5 | 499 | ret = pthread_mutex_lock(&sched->work_done_wait_mutex); |
ec156764 | 500 | BUG_ON(ret); |
0e9b07e5 | 501 | ret = pthread_mutex_unlock(&sched->work_done_wait_mutex); |
ec156764 | 502 | BUG_ON(ret); |
ec156764 IM |
503 | |
504 | goto again; | |
505 | } | |
506 | ||
0e9b07e5 | 507 | static void create_tasks(struct perf_sched *sched) |
ec156764 IM |
508 | { |
509 | struct task_desc *task; | |
510 | pthread_attr_t attr; | |
511 | unsigned long i; | |
512 | int err; | |
513 | ||
514 | err = pthread_attr_init(&attr); | |
515 | BUG_ON(err); | |
12f7e036 JP |
516 | err = pthread_attr_setstacksize(&attr, |
517 | (size_t) max(16 * 1024, PTHREAD_STACK_MIN)); | |
ec156764 | 518 | BUG_ON(err); |
0e9b07e5 | 519 | err = pthread_mutex_lock(&sched->start_work_mutex); |
ec156764 | 520 | BUG_ON(err); |
0e9b07e5 | 521 | err = pthread_mutex_lock(&sched->work_done_wait_mutex); |
ec156764 | 522 | BUG_ON(err); |
0e9b07e5 ACM |
523 | for (i = 0; i < sched->nr_tasks; i++) { |
524 | struct sched_thread_parms *parms = malloc(sizeof(*parms)); | |
525 | BUG_ON(parms == NULL); | |
526 | parms->task = task = sched->tasks[i]; | |
527 | parms->sched = sched; | |
ec156764 IM |
528 | sem_init(&task->sleep_sem, 0, 0); |
529 | sem_init(&task->ready_for_work, 0, 0); | |
530 | sem_init(&task->work_done_sem, 0, 0); | |
531 | task->curr_event = 0; | |
0e9b07e5 | 532 | err = pthread_create(&task->thread, &attr, thread_func, parms); |
ec156764 IM |
533 | BUG_ON(err); |
534 | } | |
535 | } | |
536 | ||
0e9b07e5 | 537 | static void wait_for_tasks(struct perf_sched *sched) |
ec156764 | 538 | { |
b1ffe8f3 | 539 | u64 cpu_usage_0, cpu_usage_1; |
ec156764 IM |
540 | struct task_desc *task; |
541 | unsigned long i, ret; | |
542 | ||
0e9b07e5 ACM |
543 | sched->start_time = get_nsecs(); |
544 | sched->cpu_usage = 0; | |
545 | pthread_mutex_unlock(&sched->work_done_wait_mutex); | |
ec156764 | 546 | |
0e9b07e5 ACM |
547 | for (i = 0; i < sched->nr_tasks; i++) { |
548 | task = sched->tasks[i]; | |
ec156764 IM |
549 | ret = sem_wait(&task->ready_for_work); |
550 | BUG_ON(ret); | |
551 | sem_init(&task->ready_for_work, 0, 0); | |
552 | } | |
0e9b07e5 | 553 | ret = pthread_mutex_lock(&sched->work_done_wait_mutex); |
ec156764 IM |
554 | BUG_ON(ret); |
555 | ||
556 | cpu_usage_0 = get_cpu_usage_nsec_parent(); | |
557 | ||
0e9b07e5 | 558 | pthread_mutex_unlock(&sched->start_work_mutex); |
ec156764 | 559 | |
0e9b07e5 ACM |
560 | for (i = 0; i < sched->nr_tasks; i++) { |
561 | task = sched->tasks[i]; | |
ec156764 IM |
562 | ret = sem_wait(&task->work_done_sem); |
563 | BUG_ON(ret); | |
564 | sem_init(&task->work_done_sem, 0, 0); | |
0e9b07e5 | 565 | sched->cpu_usage += task->cpu_usage; |
ec156764 IM |
566 | task->cpu_usage = 0; |
567 | } | |
568 | ||
569 | cpu_usage_1 = get_cpu_usage_nsec_parent(); | |
0e9b07e5 ACM |
570 | if (!sched->runavg_cpu_usage) |
571 | sched->runavg_cpu_usage = sched->cpu_usage; | |
572 | sched->runavg_cpu_usage = (sched->runavg_cpu_usage * 9 + sched->cpu_usage) / 10; | |
ec156764 | 573 | |
0e9b07e5 ACM |
574 | sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0; |
575 | if (!sched->runavg_parent_cpu_usage) | |
576 | sched->runavg_parent_cpu_usage = sched->parent_cpu_usage; | |
577 | sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * 9 + | |
578 | sched->parent_cpu_usage)/10; | |
ec156764 | 579 | |
0e9b07e5 | 580 | ret = pthread_mutex_lock(&sched->start_work_mutex); |
ec156764 IM |
581 | BUG_ON(ret); |
582 | ||
0e9b07e5 ACM |
583 | for (i = 0; i < sched->nr_tasks; i++) { |
584 | task = sched->tasks[i]; | |
ec156764 IM |
585 | sem_init(&task->sleep_sem, 0, 0); |
586 | task->curr_event = 0; | |
587 | } | |
588 | } | |
589 | ||
0e9b07e5 | 590 | static void run_one_test(struct perf_sched *sched) |
ec156764 | 591 | { |
fb7d0b3c | 592 | u64 T0, T1, delta, avg_delta, fluct; |
ec156764 IM |
593 | |
594 | T0 = get_nsecs(); | |
0e9b07e5 | 595 | wait_for_tasks(sched); |
ec156764 IM |
596 | T1 = get_nsecs(); |
597 | ||
598 | delta = T1 - T0; | |
0e9b07e5 ACM |
599 | sched->sum_runtime += delta; |
600 | sched->nr_runs++; | |
ec156764 | 601 | |
0e9b07e5 | 602 | avg_delta = sched->sum_runtime / sched->nr_runs; |
ec156764 IM |
603 | if (delta < avg_delta) |
604 | fluct = avg_delta - delta; | |
605 | else | |
606 | fluct = delta - avg_delta; | |
0e9b07e5 ACM |
607 | sched->sum_fluct += fluct; |
608 | if (!sched->run_avg) | |
609 | sched->run_avg = delta; | |
610 | sched->run_avg = (sched->run_avg * 9 + delta) / 10; | |
ec156764 | 611 | |
0e9b07e5 | 612 | printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0); |
ec156764 | 613 | |
0e9b07e5 | 614 | printf("ravg: %0.2f, ", (double)sched->run_avg / 1e6); |
ec156764 | 615 | |
ad236fd2 | 616 | printf("cpu: %0.2f / %0.2f", |
0e9b07e5 | 617 | (double)sched->cpu_usage / 1e6, (double)sched->runavg_cpu_usage / 1e6); |
ec156764 IM |
618 | |
619 | #if 0 | |
620 | /* | |
fbf94829 | 621 | * rusage statistics done by the parent, these are less |
0e9b07e5 | 622 | * accurate than the sched->sum_exec_runtime based statistics: |
fbf94829 | 623 | */ |
ad236fd2 | 624 | printf(" [%0.2f / %0.2f]", |
0e9b07e5 ACM |
625 | (double)sched->parent_cpu_usage/1e6, |
626 | (double)sched->runavg_parent_cpu_usage/1e6); | |
ec156764 IM |
627 | #endif |
628 | ||
ad236fd2 | 629 | printf("\n"); |
ec156764 | 630 | |
0e9b07e5 ACM |
631 | if (sched->nr_sleep_corrections) |
632 | printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections); | |
633 | sched->nr_sleep_corrections = 0; | |
ec156764 IM |
634 | } |
635 | ||
0e9b07e5 | 636 | static void test_calibrations(struct perf_sched *sched) |
ec156764 | 637 | { |
b1ffe8f3 | 638 | u64 T0, T1; |
ec156764 IM |
639 | |
640 | T0 = get_nsecs(); | |
0e9b07e5 | 641 | burn_nsecs(sched, 1e6); |
ec156764 IM |
642 | T1 = get_nsecs(); |
643 | ||
9486aa38 | 644 | printf("the run test took %" PRIu64 " nsecs\n", T1 - T0); |
ec156764 IM |
645 | |
646 | T0 = get_nsecs(); | |
647 | sleep_nsecs(1e6); | |
648 | T1 = get_nsecs(); | |
649 | ||
9486aa38 | 650 | printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0); |
ec156764 IM |
651 | } |
652 | ||
a116e05d | 653 | static int |
0e9b07e5 | 654 | replay_wakeup_event(struct perf_sched *sched, |
9ec3f4e4 ACM |
655 | struct perf_evsel *evsel, struct perf_sample *sample, |
656 | struct machine *machine __maybe_unused) | |
419ab0d6 | 657 | { |
9ec3f4e4 ACM |
658 | const char *comm = perf_evsel__strval(evsel, sample, "comm"); |
659 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"); | |
419ab0d6 | 660 | struct task_desc *waker, *wakee; |
fbf94829 | 661 | |
ad236fd2 | 662 | if (verbose) { |
2b7fcbc5 | 663 | printf("sched_wakeup event %p\n", evsel); |
fbf94829 | 664 | |
9ec3f4e4 | 665 | printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid); |
ad236fd2 | 666 | } |
fbf94829 | 667 | |
2b7fcbc5 | 668 | waker = register_pid(sched, sample->tid, "<unknown>"); |
9ec3f4e4 | 669 | wakee = register_pid(sched, pid, comm); |
fbf94829 | 670 | |
0e9b07e5 | 671 | add_sched_event_wakeup(sched, waker, sample->time, wakee); |
a116e05d | 672 | return 0; |
ec156764 IM |
673 | } |
674 | ||
9ec3f4e4 ACM |
675 | static int replay_switch_event(struct perf_sched *sched, |
676 | struct perf_evsel *evsel, | |
677 | struct perf_sample *sample, | |
678 | struct machine *machine __maybe_unused) | |
ec156764 | 679 | { |
9ec3f4e4 ACM |
680 | const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"), |
681 | *next_comm = perf_evsel__strval(evsel, sample, "next_comm"); | |
682 | const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), | |
683 | next_pid = perf_evsel__intval(evsel, sample, "next_pid"); | |
684 | const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state"); | |
1d037ca1 | 685 | struct task_desc *prev, __maybe_unused *next; |
7f7f8d0b ACM |
686 | u64 timestamp0, timestamp = sample->time; |
687 | int cpu = sample->cpu; | |
fbf94829 IM |
688 | s64 delta; |
689 | ||
ad236fd2 | 690 | if (verbose) |
2b7fcbc5 | 691 | printf("sched_switch event %p\n", evsel); |
ad236fd2 | 692 | |
fbf94829 | 693 | if (cpu >= MAX_CPUS || cpu < 0) |
a116e05d | 694 | return 0; |
fbf94829 | 695 | |
0e9b07e5 | 696 | timestamp0 = sched->cpu_last_switched[cpu]; |
fbf94829 IM |
697 | if (timestamp0) |
698 | delta = timestamp - timestamp0; | |
699 | else | |
700 | delta = 0; | |
701 | ||
a116e05d | 702 | if (delta < 0) { |
60b7d14a | 703 | pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); |
a116e05d ACM |
704 | return -1; |
705 | } | |
fbf94829 | 706 | |
9ec3f4e4 ACM |
707 | pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n", |
708 | prev_comm, prev_pid, next_comm, next_pid, delta); | |
fbf94829 | 709 | |
9ec3f4e4 ACM |
710 | prev = register_pid(sched, prev_pid, prev_comm); |
711 | next = register_pid(sched, next_pid, next_comm); | |
fbf94829 | 712 | |
0e9b07e5 | 713 | sched->cpu_last_switched[cpu] = timestamp; |
fbf94829 | 714 | |
0e9b07e5 | 715 | add_sched_event_run(sched, prev, timestamp, delta); |
9ec3f4e4 | 716 | add_sched_event_sleep(sched, prev, timestamp, prev_state); |
a116e05d ACM |
717 | |
718 | return 0; | |
fbf94829 IM |
719 | } |
720 | ||
cb627505 DA |
721 | static int replay_fork_event(struct perf_sched *sched, |
722 | union perf_event *event, | |
723 | struct machine *machine) | |
419ab0d6 | 724 | { |
cb627505 DA |
725 | struct thread *child, *parent; |
726 | ||
727 | child = machine__findnew_thread(machine, event->fork.tid); | |
728 | parent = machine__findnew_thread(machine, event->fork.ptid); | |
729 | ||
730 | if (child == NULL || parent == NULL) { | |
731 | pr_debug("thread does not exist on fork event: child %p, parent %p\n", | |
732 | child, parent); | |
733 | return 0; | |
734 | } | |
9ec3f4e4 | 735 | |
419ab0d6 | 736 | if (verbose) { |
cb627505 DA |
737 | printf("fork event\n"); |
738 | printf("... parent: %s/%d\n", parent->comm, parent->tid); | |
739 | printf("... child: %s/%d\n", child->comm, child->tid); | |
419ab0d6 | 740 | } |
9ec3f4e4 | 741 | |
cb627505 DA |
742 | register_pid(sched, parent->tid, parent->comm); |
743 | register_pid(sched, child->tid, child->comm); | |
a116e05d | 744 | return 0; |
419ab0d6 | 745 | } |
fbf94829 | 746 | |
b1ffe8f3 IM |
747 | struct sort_dimension { |
748 | const char *name; | |
b5fae128 | 749 | sort_fn_t cmp; |
b1ffe8f3 IM |
750 | struct list_head list; |
751 | }; | |
752 | ||
daa1d7a5 | 753 | static int |
39aeb52f | 754 | thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r) |
daa1d7a5 FW |
755 | { |
756 | struct sort_dimension *sort; | |
757 | int ret = 0; | |
758 | ||
b5fae128 IM |
759 | BUG_ON(list_empty(list)); |
760 | ||
daa1d7a5 FW |
761 | list_for_each_entry(sort, list, list) { |
762 | ret = sort->cmp(l, r); | |
763 | if (ret) | |
764 | return ret; | |
765 | } | |
766 | ||
767 | return ret; | |
768 | } | |
769 | ||
39aeb52f | 770 | static struct work_atoms * |
b5fae128 IM |
771 | thread_atoms_search(struct rb_root *root, struct thread *thread, |
772 | struct list_head *sort_list) | |
773 | { | |
774 | struct rb_node *node = root->rb_node; | |
39aeb52f | 775 | struct work_atoms key = { .thread = thread }; |
b5fae128 IM |
776 | |
777 | while (node) { | |
39aeb52f | 778 | struct work_atoms *atoms; |
b5fae128 IM |
779 | int cmp; |
780 | ||
39aeb52f | 781 | atoms = container_of(node, struct work_atoms, node); |
b5fae128 IM |
782 | |
783 | cmp = thread_lat_cmp(sort_list, &key, atoms); | |
784 | if (cmp > 0) | |
785 | node = node->rb_left; | |
786 | else if (cmp < 0) | |
787 | node = node->rb_right; | |
788 | else { | |
789 | BUG_ON(thread != atoms->thread); | |
790 | return atoms; | |
791 | } | |
792 | } | |
793 | return NULL; | |
794 | } | |
795 | ||
cdce9d73 | 796 | static void |
39aeb52f | 797 | __thread_latency_insert(struct rb_root *root, struct work_atoms *data, |
daa1d7a5 | 798 | struct list_head *sort_list) |
cdce9d73 FW |
799 | { |
800 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
801 | ||
802 | while (*new) { | |
39aeb52f | 803 | struct work_atoms *this; |
daa1d7a5 | 804 | int cmp; |
cdce9d73 | 805 | |
39aeb52f | 806 | this = container_of(*new, struct work_atoms, node); |
cdce9d73 | 807 | parent = *new; |
daa1d7a5 FW |
808 | |
809 | cmp = thread_lat_cmp(sort_list, data, this); | |
810 | ||
811 | if (cmp > 0) | |
cdce9d73 | 812 | new = &((*new)->rb_left); |
cdce9d73 | 813 | else |
daa1d7a5 | 814 | new = &((*new)->rb_right); |
cdce9d73 FW |
815 | } |
816 | ||
817 | rb_link_node(&data->node, parent, new); | |
818 | rb_insert_color(&data->node, root); | |
819 | } | |
820 | ||
0e9b07e5 | 821 | static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread) |
cdce9d73 | 822 | { |
36479484 | 823 | struct work_atoms *atoms = zalloc(sizeof(*atoms)); |
a116e05d ACM |
824 | if (!atoms) { |
825 | pr_err("No memory at %s\n", __func__); | |
826 | return -1; | |
827 | } | |
cdce9d73 | 828 | |
17562205 | 829 | atoms->thread = thread; |
39aeb52f | 830 | INIT_LIST_HEAD(&atoms->work_list); |
0e9b07e5 | 831 | __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid); |
a116e05d | 832 | return 0; |
cdce9d73 FW |
833 | } |
834 | ||
9ec3f4e4 | 835 | static char sched_out_state(u64 prev_state) |
cdce9d73 FW |
836 | { |
837 | const char *str = TASK_STATE_TO_CHAR_STR; | |
838 | ||
9ec3f4e4 | 839 | return str[prev_state]; |
cdce9d73 FW |
840 | } |
841 | ||
a116e05d | 842 | static int |
39aeb52f | 843 | add_sched_out_event(struct work_atoms *atoms, |
844 | char run_state, | |
845 | u64 timestamp) | |
cdce9d73 | 846 | { |
36479484 | 847 | struct work_atom *atom = zalloc(sizeof(*atom)); |
a116e05d ACM |
848 | if (!atom) { |
849 | pr_err("Non memory at %s", __func__); | |
850 | return -1; | |
851 | } | |
cdce9d73 | 852 | |
aa1ab9d2 FW |
853 | atom->sched_out_time = timestamp; |
854 | ||
39aeb52f | 855 | if (run_state == 'R') { |
b1ffe8f3 | 856 | atom->state = THREAD_WAIT_CPU; |
aa1ab9d2 | 857 | atom->wake_up_time = atom->sched_out_time; |
c6ced611 FW |
858 | } |
859 | ||
39aeb52f | 860 | list_add_tail(&atom->list, &atoms->work_list); |
a116e05d | 861 | return 0; |
cdce9d73 FW |
862 | } |
863 | ||
864 | static void | |
1d037ca1 IT |
865 | add_runtime_event(struct work_atoms *atoms, u64 delta, |
866 | u64 timestamp __maybe_unused) | |
39aeb52f | 867 | { |
868 | struct work_atom *atom; | |
869 | ||
870 | BUG_ON(list_empty(&atoms->work_list)); | |
871 | ||
872 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); | |
873 | ||
874 | atom->runtime += delta; | |
875 | atoms->total_runtime += delta; | |
876 | } | |
877 | ||
878 | static void | |
879 | add_sched_in_event(struct work_atoms *atoms, u64 timestamp) | |
cdce9d73 | 880 | { |
b1ffe8f3 | 881 | struct work_atom *atom; |
66685678 | 882 | u64 delta; |
cdce9d73 | 883 | |
39aeb52f | 884 | if (list_empty(&atoms->work_list)) |
cdce9d73 FW |
885 | return; |
886 | ||
39aeb52f | 887 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); |
cdce9d73 | 888 | |
b1ffe8f3 | 889 | if (atom->state != THREAD_WAIT_CPU) |
cdce9d73 FW |
890 | return; |
891 | ||
b1ffe8f3 IM |
892 | if (timestamp < atom->wake_up_time) { |
893 | atom->state = THREAD_IGNORE; | |
cdce9d73 FW |
894 | return; |
895 | } | |
896 | ||
b1ffe8f3 IM |
897 | atom->state = THREAD_SCHED_IN; |
898 | atom->sched_in_time = timestamp; | |
66685678 | 899 | |
b1ffe8f3 | 900 | delta = atom->sched_in_time - atom->wake_up_time; |
66685678 | 901 | atoms->total_lat += delta; |
3786310a | 902 | if (delta > atoms->max_lat) { |
66685678 | 903 | atoms->max_lat = delta; |
3786310a FW |
904 | atoms->max_lat_at = timestamp; |
905 | } | |
66685678 | 906 | atoms->nb_atoms++; |
cdce9d73 FW |
907 | } |
908 | ||
9ec3f4e4 ACM |
909 | static int latency_switch_event(struct perf_sched *sched, |
910 | struct perf_evsel *evsel, | |
911 | struct perf_sample *sample, | |
912 | struct machine *machine) | |
cdce9d73 | 913 | { |
9ec3f4e4 ACM |
914 | const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), |
915 | next_pid = perf_evsel__intval(evsel, sample, "next_pid"); | |
916 | const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state"); | |
39aeb52f | 917 | struct work_atoms *out_events, *in_events; |
cdce9d73 | 918 | struct thread *sched_out, *sched_in; |
7f7f8d0b ACM |
919 | u64 timestamp0, timestamp = sample->time; |
920 | int cpu = sample->cpu; | |
ea92ed5a IM |
921 | s64 delta; |
922 | ||
39aeb52f | 923 | BUG_ON(cpu >= MAX_CPUS || cpu < 0); |
ea92ed5a | 924 | |
0e9b07e5 ACM |
925 | timestamp0 = sched->cpu_last_switched[cpu]; |
926 | sched->cpu_last_switched[cpu] = timestamp; | |
ea92ed5a IM |
927 | if (timestamp0) |
928 | delta = timestamp - timestamp0; | |
929 | else | |
930 | delta = 0; | |
931 | ||
a116e05d ACM |
932 | if (delta < 0) { |
933 | pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); | |
934 | return -1; | |
935 | } | |
cdce9d73 | 936 | |
9ec3f4e4 ACM |
937 | sched_out = machine__findnew_thread(machine, prev_pid); |
938 | sched_in = machine__findnew_thread(machine, next_pid); | |
cdce9d73 | 939 | |
0e9b07e5 | 940 | out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid); |
39aeb52f | 941 | if (!out_events) { |
0e9b07e5 | 942 | if (thread_atoms_insert(sched, sched_out)) |
a116e05d | 943 | return -1; |
0e9b07e5 | 944 | out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid); |
a116e05d ACM |
945 | if (!out_events) { |
946 | pr_err("out-event: Internal tree error"); | |
947 | return -1; | |
948 | } | |
39aeb52f | 949 | } |
9ec3f4e4 | 950 | if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp)) |
a116e05d | 951 | return -1; |
39aeb52f | 952 | |
0e9b07e5 | 953 | in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid); |
39aeb52f | 954 | if (!in_events) { |
0e9b07e5 | 955 | if (thread_atoms_insert(sched, sched_in)) |
a116e05d | 956 | return -1; |
0e9b07e5 | 957 | in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid); |
a116e05d ACM |
958 | if (!in_events) { |
959 | pr_err("in-event: Internal tree error"); | |
960 | return -1; | |
961 | } | |
39aeb52f | 962 | /* |
963 | * Take came in we have not heard about yet, | |
964 | * add in an initial atom in runnable state: | |
965 | */ | |
a116e05d ACM |
966 | if (add_sched_out_event(in_events, 'R', timestamp)) |
967 | return -1; | |
cdce9d73 | 968 | } |
39aeb52f | 969 | add_sched_in_event(in_events, timestamp); |
a116e05d ACM |
970 | |
971 | return 0; | |
39aeb52f | 972 | } |
cdce9d73 | 973 | |
9ec3f4e4 ACM |
974 | static int latency_runtime_event(struct perf_sched *sched, |
975 | struct perf_evsel *evsel, | |
976 | struct perf_sample *sample, | |
977 | struct machine *machine) | |
39aeb52f | 978 | { |
9ec3f4e4 ACM |
979 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"); |
980 | const u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); | |
981 | struct thread *thread = machine__findnew_thread(machine, pid); | |
0e9b07e5 | 982 | struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid); |
7f7f8d0b ACM |
983 | u64 timestamp = sample->time; |
984 | int cpu = sample->cpu; | |
39aeb52f | 985 | |
986 | BUG_ON(cpu >= MAX_CPUS || cpu < 0); | |
39aeb52f | 987 | if (!atoms) { |
0e9b07e5 | 988 | if (thread_atoms_insert(sched, thread)) |
a116e05d | 989 | return -1; |
0e9b07e5 | 990 | atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid); |
a116e05d | 991 | if (!atoms) { |
60b7d14a | 992 | pr_err("in-event: Internal tree error"); |
a116e05d ACM |
993 | return -1; |
994 | } | |
995 | if (add_sched_out_event(atoms, 'R', timestamp)) | |
996 | return -1; | |
cdce9d73 FW |
997 | } |
998 | ||
9ec3f4e4 | 999 | add_runtime_event(atoms, runtime, timestamp); |
a116e05d | 1000 | return 0; |
cdce9d73 FW |
1001 | } |
1002 | ||
9ec3f4e4 ACM |
1003 | static int latency_wakeup_event(struct perf_sched *sched, |
1004 | struct perf_evsel *evsel, | |
1005 | struct perf_sample *sample, | |
1006 | struct machine *machine) | |
cdce9d73 | 1007 | { |
9ec3f4e4 ACM |
1008 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"), |
1009 | success = perf_evsel__intval(evsel, sample, "success"); | |
39aeb52f | 1010 | struct work_atoms *atoms; |
b1ffe8f3 | 1011 | struct work_atom *atom; |
cdce9d73 | 1012 | struct thread *wakee; |
7f7f8d0b | 1013 | u64 timestamp = sample->time; |
cdce9d73 FW |
1014 | |
1015 | /* Note for later, it may be interesting to observe the failing cases */ | |
9ec3f4e4 | 1016 | if (!success) |
a116e05d | 1017 | return 0; |
cdce9d73 | 1018 | |
9ec3f4e4 | 1019 | wakee = machine__findnew_thread(machine, pid); |
0e9b07e5 | 1020 | atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid); |
17562205 | 1021 | if (!atoms) { |
0e9b07e5 | 1022 | if (thread_atoms_insert(sched, wakee)) |
a116e05d | 1023 | return -1; |
0e9b07e5 | 1024 | atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid); |
a116e05d | 1025 | if (!atoms) { |
60b7d14a | 1026 | pr_err("wakeup-event: Internal tree error"); |
a116e05d ACM |
1027 | return -1; |
1028 | } | |
1029 | if (add_sched_out_event(atoms, 'S', timestamp)) | |
1030 | return -1; | |
cdce9d73 FW |
1031 | } |
1032 | ||
39aeb52f | 1033 | BUG_ON(list_empty(&atoms->work_list)); |
cdce9d73 | 1034 | |
39aeb52f | 1035 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); |
cdce9d73 | 1036 | |
55ffb7a6 MG |
1037 | /* |
1038 | * You WILL be missing events if you've recorded only | |
1039 | * one CPU, or are only looking at only one, so don't | |
1040 | * make useless noise. | |
1041 | */ | |
0e9b07e5 ACM |
1042 | if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING) |
1043 | sched->nr_state_machine_bugs++; | |
cdce9d73 | 1044 | |
0e9b07e5 | 1045 | sched->nr_timestamps++; |
ea57c4f5 | 1046 | if (atom->sched_out_time > timestamp) { |
0e9b07e5 | 1047 | sched->nr_unordered_timestamps++; |
a116e05d | 1048 | return 0; |
ea57c4f5 | 1049 | } |
aa1ab9d2 | 1050 | |
b1ffe8f3 IM |
1051 | atom->state = THREAD_WAIT_CPU; |
1052 | atom->wake_up_time = timestamp; | |
a116e05d | 1053 | return 0; |
cdce9d73 FW |
1054 | } |
1055 | ||
9ec3f4e4 ACM |
1056 | static int latency_migrate_task_event(struct perf_sched *sched, |
1057 | struct perf_evsel *evsel, | |
1058 | struct perf_sample *sample, | |
1059 | struct machine *machine) | |
55ffb7a6 | 1060 | { |
9ec3f4e4 | 1061 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"); |
7f7f8d0b | 1062 | u64 timestamp = sample->time; |
55ffb7a6 MG |
1063 | struct work_atoms *atoms; |
1064 | struct work_atom *atom; | |
1065 | struct thread *migrant; | |
1066 | ||
1067 | /* | |
1068 | * Only need to worry about migration when profiling one CPU. | |
1069 | */ | |
0e9b07e5 | 1070 | if (sched->profile_cpu == -1) |
a116e05d | 1071 | return 0; |
55ffb7a6 | 1072 | |
9ec3f4e4 | 1073 | migrant = machine__findnew_thread(machine, pid); |
0e9b07e5 | 1074 | atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid); |
55ffb7a6 | 1075 | if (!atoms) { |
0e9b07e5 | 1076 | if (thread_atoms_insert(sched, migrant)) |
a116e05d | 1077 | return -1; |
38051234 | 1078 | register_pid(sched, migrant->tid, migrant->comm); |
0e9b07e5 | 1079 | atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid); |
a116e05d | 1080 | if (!atoms) { |
60b7d14a | 1081 | pr_err("migration-event: Internal tree error"); |
a116e05d ACM |
1082 | return -1; |
1083 | } | |
1084 | if (add_sched_out_event(atoms, 'R', timestamp)) | |
1085 | return -1; | |
55ffb7a6 MG |
1086 | } |
1087 | ||
1088 | BUG_ON(list_empty(&atoms->work_list)); | |
1089 | ||
1090 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); | |
1091 | atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp; | |
1092 | ||
0e9b07e5 | 1093 | sched->nr_timestamps++; |
55ffb7a6 MG |
1094 | |
1095 | if (atom->sched_out_time > timestamp) | |
0e9b07e5 | 1096 | sched->nr_unordered_timestamps++; |
a116e05d ACM |
1097 | |
1098 | return 0; | |
55ffb7a6 MG |
1099 | } |
1100 | ||
0e9b07e5 | 1101 | static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list) |
cdce9d73 | 1102 | { |
cdce9d73 FW |
1103 | int i; |
1104 | int ret; | |
66685678 | 1105 | u64 avg; |
cdce9d73 | 1106 | |
39aeb52f | 1107 | if (!work_list->nb_atoms) |
cdce9d73 | 1108 | return; |
ea57c4f5 IM |
1109 | /* |
1110 | * Ignore idle threads: | |
1111 | */ | |
80ed0987 | 1112 | if (!strcmp(work_list->thread->comm, "swapper")) |
ea57c4f5 | 1113 | return; |
cdce9d73 | 1114 | |
0e9b07e5 ACM |
1115 | sched->all_runtime += work_list->total_runtime; |
1116 | sched->all_count += work_list->nb_atoms; | |
66685678 | 1117 | |
38051234 | 1118 | ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->tid); |
cdce9d73 | 1119 | |
08f69e6c | 1120 | for (i = 0; i < 24 - ret; i++) |
cdce9d73 FW |
1121 | printf(" "); |
1122 | ||
39aeb52f | 1123 | avg = work_list->total_lat / work_list->nb_atoms; |
cdce9d73 | 1124 | |
9486aa38 | 1125 | printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %9.6f s\n", |
39aeb52f | 1126 | (double)work_list->total_runtime / 1e6, |
1127 | work_list->nb_atoms, (double)avg / 1e6, | |
3786310a FW |
1128 | (double)work_list->max_lat / 1e6, |
1129 | (double)work_list->max_lat_at / 1e9); | |
cdce9d73 FW |
1130 | } |
1131 | ||
39aeb52f | 1132 | static int pid_cmp(struct work_atoms *l, struct work_atoms *r) |
daa1d7a5 | 1133 | { |
38051234 | 1134 | if (l->thread->tid < r->thread->tid) |
daa1d7a5 | 1135 | return -1; |
38051234 | 1136 | if (l->thread->tid > r->thread->tid) |
daa1d7a5 FW |
1137 | return 1; |
1138 | ||
1139 | return 0; | |
1140 | } | |
1141 | ||
39aeb52f | 1142 | static int avg_cmp(struct work_atoms *l, struct work_atoms *r) |
daa1d7a5 FW |
1143 | { |
1144 | u64 avgl, avgr; | |
1145 | ||
1146 | if (!l->nb_atoms) | |
1147 | return -1; | |
1148 | ||
1149 | if (!r->nb_atoms) | |
1150 | return 1; | |
1151 | ||
1152 | avgl = l->total_lat / l->nb_atoms; | |
1153 | avgr = r->total_lat / r->nb_atoms; | |
1154 | ||
1155 | if (avgl < avgr) | |
1156 | return -1; | |
1157 | if (avgl > avgr) | |
1158 | return 1; | |
1159 | ||
1160 | return 0; | |
1161 | } | |
1162 | ||
39aeb52f | 1163 | static int max_cmp(struct work_atoms *l, struct work_atoms *r) |
daa1d7a5 FW |
1164 | { |
1165 | if (l->max_lat < r->max_lat) | |
1166 | return -1; | |
1167 | if (l->max_lat > r->max_lat) | |
1168 | return 1; | |
1169 | ||
1170 | return 0; | |
1171 | } | |
1172 | ||
39aeb52f | 1173 | static int switch_cmp(struct work_atoms *l, struct work_atoms *r) |
daa1d7a5 FW |
1174 | { |
1175 | if (l->nb_atoms < r->nb_atoms) | |
1176 | return -1; | |
1177 | if (l->nb_atoms > r->nb_atoms) | |
1178 | return 1; | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
39aeb52f | 1183 | static int runtime_cmp(struct work_atoms *l, struct work_atoms *r) |
daa1d7a5 FW |
1184 | { |
1185 | if (l->total_runtime < r->total_runtime) | |
1186 | return -1; | |
1187 | if (l->total_runtime > r->total_runtime) | |
1188 | return 1; | |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | ||
cbef79a8 | 1193 | static int sort_dimension__add(const char *tok, struct list_head *list) |
daa1d7a5 | 1194 | { |
0e9b07e5 ACM |
1195 | size_t i; |
1196 | static struct sort_dimension avg_sort_dimension = { | |
1197 | .name = "avg", | |
1198 | .cmp = avg_cmp, | |
1199 | }; | |
1200 | static struct sort_dimension max_sort_dimension = { | |
1201 | .name = "max", | |
1202 | .cmp = max_cmp, | |
1203 | }; | |
1204 | static struct sort_dimension pid_sort_dimension = { | |
1205 | .name = "pid", | |
1206 | .cmp = pid_cmp, | |
1207 | }; | |
1208 | static struct sort_dimension runtime_sort_dimension = { | |
1209 | .name = "runtime", | |
1210 | .cmp = runtime_cmp, | |
1211 | }; | |
1212 | static struct sort_dimension switch_sort_dimension = { | |
1213 | .name = "switch", | |
1214 | .cmp = switch_cmp, | |
1215 | }; | |
1216 | struct sort_dimension *available_sorts[] = { | |
1217 | &pid_sort_dimension, | |
1218 | &avg_sort_dimension, | |
1219 | &max_sort_dimension, | |
1220 | &switch_sort_dimension, | |
1221 | &runtime_sort_dimension, | |
1222 | }; | |
daa1d7a5 | 1223 | |
0e9b07e5 | 1224 | for (i = 0; i < ARRAY_SIZE(available_sorts); i++) { |
daa1d7a5 FW |
1225 | if (!strcmp(available_sorts[i]->name, tok)) { |
1226 | list_add_tail(&available_sorts[i]->list, list); | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | return -1; | |
1233 | } | |
1234 | ||
0e9b07e5 | 1235 | static void perf_sched__sort_lat(struct perf_sched *sched) |
daa1d7a5 FW |
1236 | { |
1237 | struct rb_node *node; | |
1238 | ||
1239 | for (;;) { | |
39aeb52f | 1240 | struct work_atoms *data; |
0e9b07e5 | 1241 | node = rb_first(&sched->atom_root); |
daa1d7a5 FW |
1242 | if (!node) |
1243 | break; | |
1244 | ||
0e9b07e5 | 1245 | rb_erase(node, &sched->atom_root); |
39aeb52f | 1246 | data = rb_entry(node, struct work_atoms, node); |
0e9b07e5 | 1247 | __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list); |
daa1d7a5 FW |
1248 | } |
1249 | } | |
1250 | ||
0e9b07e5 | 1251 | static int process_sched_wakeup_event(struct perf_tool *tool, |
2b7fcbc5 | 1252 | struct perf_evsel *evsel, |
1d037ca1 | 1253 | struct perf_sample *sample, |
4218e673 | 1254 | struct machine *machine) |
419ab0d6 | 1255 | { |
0e9b07e5 | 1256 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
419ab0d6 | 1257 | |
9ec3f4e4 ACM |
1258 | if (sched->tp_handler->wakeup_event) |
1259 | return sched->tp_handler->wakeup_event(sched, evsel, sample, machine); | |
a116e05d | 1260 | |
2b7fcbc5 | 1261 | return 0; |
419ab0d6 FW |
1262 | } |
1263 | ||
9ec3f4e4 ACM |
1264 | static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel, |
1265 | struct perf_sample *sample, struct machine *machine) | |
0ec04e16 | 1266 | { |
9ec3f4e4 ACM |
1267 | const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), |
1268 | next_pid = perf_evsel__intval(evsel, sample, "next_pid"); | |
1d037ca1 | 1269 | struct thread *sched_out __maybe_unused, *sched_in; |
0ec04e16 | 1270 | int new_shortname; |
7f7f8d0b | 1271 | u64 timestamp0, timestamp = sample->time; |
0ec04e16 | 1272 | s64 delta; |
7f7f8d0b | 1273 | int cpu, this_cpu = sample->cpu; |
0ec04e16 IM |
1274 | |
1275 | BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0); | |
1276 | ||
0e9b07e5 ACM |
1277 | if (this_cpu > sched->max_cpu) |
1278 | sched->max_cpu = this_cpu; | |
0ec04e16 | 1279 | |
0e9b07e5 ACM |
1280 | timestamp0 = sched->cpu_last_switched[this_cpu]; |
1281 | sched->cpu_last_switched[this_cpu] = timestamp; | |
0ec04e16 IM |
1282 | if (timestamp0) |
1283 | delta = timestamp - timestamp0; | |
1284 | else | |
1285 | delta = 0; | |
1286 | ||
a116e05d | 1287 | if (delta < 0) { |
60b7d14a | 1288 | pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); |
a116e05d ACM |
1289 | return -1; |
1290 | } | |
0ec04e16 | 1291 | |
9ec3f4e4 ACM |
1292 | sched_out = machine__findnew_thread(machine, prev_pid); |
1293 | sched_in = machine__findnew_thread(machine, next_pid); | |
0ec04e16 | 1294 | |
0e9b07e5 | 1295 | sched->curr_thread[this_cpu] = sched_in; |
0ec04e16 IM |
1296 | |
1297 | printf(" "); | |
1298 | ||
1299 | new_shortname = 0; | |
1300 | if (!sched_in->shortname[0]) { | |
0e9b07e5 ACM |
1301 | sched_in->shortname[0] = sched->next_shortname1; |
1302 | sched_in->shortname[1] = sched->next_shortname2; | |
0ec04e16 | 1303 | |
0e9b07e5 ACM |
1304 | if (sched->next_shortname1 < 'Z') { |
1305 | sched->next_shortname1++; | |
0ec04e16 | 1306 | } else { |
0e9b07e5 ACM |
1307 | sched->next_shortname1='A'; |
1308 | if (sched->next_shortname2 < '9') { | |
1309 | sched->next_shortname2++; | |
0ec04e16 | 1310 | } else { |
0e9b07e5 | 1311 | sched->next_shortname2='0'; |
0ec04e16 IM |
1312 | } |
1313 | } | |
1314 | new_shortname = 1; | |
1315 | } | |
1316 | ||
0e9b07e5 | 1317 | for (cpu = 0; cpu <= sched->max_cpu; cpu++) { |
0ec04e16 IM |
1318 | if (cpu != this_cpu) |
1319 | printf(" "); | |
1320 | else | |
1321 | printf("*"); | |
1322 | ||
0e9b07e5 | 1323 | if (sched->curr_thread[cpu]) { |
38051234 | 1324 | if (sched->curr_thread[cpu]->tid) |
0e9b07e5 | 1325 | printf("%2s ", sched->curr_thread[cpu]->shortname); |
0ec04e16 IM |
1326 | else |
1327 | printf(". "); | |
1328 | } else | |
1329 | printf(" "); | |
1330 | } | |
1331 | ||
1332 | printf(" %12.6f secs ", (double)timestamp/1e9); | |
1333 | if (new_shortname) { | |
1334 | printf("%s => %s:%d\n", | |
38051234 | 1335 | sched_in->shortname, sched_in->comm, sched_in->tid); |
0ec04e16 IM |
1336 | } else { |
1337 | printf("\n"); | |
1338 | } | |
a116e05d ACM |
1339 | |
1340 | return 0; | |
0ec04e16 IM |
1341 | } |
1342 | ||
0e9b07e5 | 1343 | static int process_sched_switch_event(struct perf_tool *tool, |
2b7fcbc5 | 1344 | struct perf_evsel *evsel, |
1d037ca1 | 1345 | struct perf_sample *sample, |
4218e673 | 1346 | struct machine *machine) |
419ab0d6 | 1347 | { |
0e9b07e5 | 1348 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
a116e05d | 1349 | int this_cpu = sample->cpu, err = 0; |
2b7fcbc5 ACM |
1350 | u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), |
1351 | next_pid = perf_evsel__intval(evsel, sample, "next_pid"); | |
419ab0d6 | 1352 | |
0e9b07e5 | 1353 | if (sched->curr_pid[this_cpu] != (u32)-1) { |
c8a37751 IM |
1354 | /* |
1355 | * Are we trying to switch away a PID that is | |
1356 | * not current? | |
1357 | */ | |
2b7fcbc5 | 1358 | if (sched->curr_pid[this_cpu] != prev_pid) |
0e9b07e5 | 1359 | sched->nr_context_switch_bugs++; |
c8a37751 | 1360 | } |
c8a37751 | 1361 | |
9ec3f4e4 ACM |
1362 | if (sched->tp_handler->switch_event) |
1363 | err = sched->tp_handler->switch_event(sched, evsel, sample, machine); | |
2b7fcbc5 ACM |
1364 | |
1365 | sched->curr_pid[this_cpu] = next_pid; | |
a116e05d | 1366 | return err; |
419ab0d6 FW |
1367 | } |
1368 | ||
0e9b07e5 | 1369 | static int process_sched_runtime_event(struct perf_tool *tool, |
2b7fcbc5 | 1370 | struct perf_evsel *evsel, |
1d037ca1 | 1371 | struct perf_sample *sample, |
4218e673 | 1372 | struct machine *machine) |
39aeb52f | 1373 | { |
0e9b07e5 | 1374 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
39aeb52f | 1375 | |
9ec3f4e4 ACM |
1376 | if (sched->tp_handler->runtime_event) |
1377 | return sched->tp_handler->runtime_event(sched, evsel, sample, machine); | |
a116e05d | 1378 | |
2b7fcbc5 | 1379 | return 0; |
39aeb52f | 1380 | } |
1381 | ||
cb627505 DA |
1382 | static int perf_sched__process_fork_event(struct perf_tool *tool, |
1383 | union perf_event *event, | |
1384 | struct perf_sample *sample, | |
1385 | struct machine *machine) | |
fbf94829 | 1386 | { |
0e9b07e5 | 1387 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
46538818 | 1388 | |
cb627505 DA |
1389 | /* run the fork event through the perf machineruy */ |
1390 | perf_event__process_fork(tool, event, sample, machine); | |
1391 | ||
1392 | /* and then run additional processing needed for this command */ | |
9ec3f4e4 | 1393 | if (sched->tp_handler->fork_event) |
cb627505 | 1394 | return sched->tp_handler->fork_event(sched, event, machine); |
a116e05d | 1395 | |
2b7fcbc5 | 1396 | return 0; |
fbf94829 IM |
1397 | } |
1398 | ||
0e9b07e5 | 1399 | static int process_sched_migrate_task_event(struct perf_tool *tool, |
2b7fcbc5 | 1400 | struct perf_evsel *evsel, |
1d037ca1 | 1401 | struct perf_sample *sample, |
4218e673 | 1402 | struct machine *machine) |
55ffb7a6 | 1403 | { |
0e9b07e5 | 1404 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
55ffb7a6 | 1405 | |
9ec3f4e4 ACM |
1406 | if (sched->tp_handler->migrate_task_event) |
1407 | return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine); | |
a116e05d | 1408 | |
2b7fcbc5 | 1409 | return 0; |
55ffb7a6 MG |
1410 | } |
1411 | ||
a116e05d | 1412 | typedef int (*tracepoint_handler)(struct perf_tool *tool, |
2b7fcbc5 | 1413 | struct perf_evsel *evsel, |
a116e05d | 1414 | struct perf_sample *sample, |
4218e673 | 1415 | struct machine *machine); |
ec156764 | 1416 | |
1d037ca1 IT |
1417 | static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused, |
1418 | union perf_event *event __maybe_unused, | |
ee29be62 ACM |
1419 | struct perf_sample *sample, |
1420 | struct perf_evsel *evsel, | |
1421 | struct machine *machine) | |
0a02ad93 | 1422 | { |
a116e05d | 1423 | int err = 0; |
0a02ad93 | 1424 | |
ee29be62 ACM |
1425 | evsel->hists.stats.total_period += sample->period; |
1426 | hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); | |
f39cdf25 | 1427 | |
ee29be62 ACM |
1428 | if (evsel->handler.func != NULL) { |
1429 | tracepoint_handler f = evsel->handler.func; | |
2b7fcbc5 | 1430 | err = f(tool, evsel, sample, machine); |
ee29be62 | 1431 | } |
0a02ad93 | 1432 | |
a116e05d | 1433 | return err; |
0a02ad93 IM |
1434 | } |
1435 | ||
ad9def7c | 1436 | static int perf_sched__read_events(struct perf_sched *sched, |
0e9b07e5 | 1437 | struct perf_session **psession) |
0a02ad93 | 1438 | { |
ee29be62 ACM |
1439 | const struct perf_evsel_str_handler handlers[] = { |
1440 | { "sched:sched_switch", process_sched_switch_event, }, | |
1441 | { "sched:sched_stat_runtime", process_sched_runtime_event, }, | |
1442 | { "sched:sched_wakeup", process_sched_wakeup_event, }, | |
1443 | { "sched:sched_wakeup_new", process_sched_wakeup_event, }, | |
ee29be62 ACM |
1444 | { "sched:sched_migrate_task", process_sched_migrate_task_event, }, |
1445 | }; | |
da378962 ACM |
1446 | struct perf_session *session; |
1447 | ||
70cb4e96 | 1448 | session = perf_session__new(input_name, O_RDONLY, 0, false, &sched->tool); |
a116e05d ACM |
1449 | if (session == NULL) { |
1450 | pr_debug("No Memory for session\n"); | |
1451 | return -1; | |
1452 | } | |
94c744b6 | 1453 | |
a116e05d ACM |
1454 | if (perf_session__set_tracepoints_handlers(session, handlers)) |
1455 | goto out_delete; | |
ee29be62 | 1456 | |
cee75ac7 | 1457 | if (perf_session__has_traces(session, "record -R")) { |
0e9b07e5 | 1458 | int err = perf_session__process_events(session, &sched->tool); |
a116e05d ACM |
1459 | if (err) { |
1460 | pr_err("Failed to process events, error %d", err); | |
1461 | goto out_delete; | |
1462 | } | |
4c09bafa | 1463 | |
28a6b6aa ACM |
1464 | sched->nr_events = session->stats.nr_events[0]; |
1465 | sched->nr_lost_events = session->stats.total_lost; | |
1466 | sched->nr_lost_chunks = session->stats.nr_events[PERF_RECORD_LOST]; | |
cee75ac7 | 1467 | } |
d549c769 | 1468 | |
4c09bafa JO |
1469 | if (psession) |
1470 | *psession = session; | |
ad9def7c DA |
1471 | else |
1472 | perf_session__delete(session); | |
a116e05d ACM |
1473 | |
1474 | return 0; | |
1475 | ||
1476 | out_delete: | |
1477 | perf_session__delete(session); | |
1478 | return -1; | |
0a02ad93 IM |
1479 | } |
1480 | ||
0e9b07e5 | 1481 | static void print_bad_events(struct perf_sched *sched) |
0ec04e16 | 1482 | { |
0e9b07e5 | 1483 | if (sched->nr_unordered_timestamps && sched->nr_timestamps) { |
0ec04e16 | 1484 | printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n", |
0e9b07e5 ACM |
1485 | (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0, |
1486 | sched->nr_unordered_timestamps, sched->nr_timestamps); | |
0ec04e16 | 1487 | } |
0e9b07e5 | 1488 | if (sched->nr_lost_events && sched->nr_events) { |
0ec04e16 | 1489 | printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n", |
0e9b07e5 ACM |
1490 | (double)sched->nr_lost_events/(double)sched->nr_events * 100.0, |
1491 | sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks); | |
0ec04e16 | 1492 | } |
0e9b07e5 | 1493 | if (sched->nr_state_machine_bugs && sched->nr_timestamps) { |
0ec04e16 | 1494 | printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)", |
0e9b07e5 ACM |
1495 | (double)sched->nr_state_machine_bugs/(double)sched->nr_timestamps*100.0, |
1496 | sched->nr_state_machine_bugs, sched->nr_timestamps); | |
1497 | if (sched->nr_lost_events) | |
0ec04e16 IM |
1498 | printf(" (due to lost events?)"); |
1499 | printf("\n"); | |
1500 | } | |
0e9b07e5 | 1501 | if (sched->nr_context_switch_bugs && sched->nr_timestamps) { |
0ec04e16 | 1502 | printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)", |
0e9b07e5 ACM |
1503 | (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0, |
1504 | sched->nr_context_switch_bugs, sched->nr_timestamps); | |
1505 | if (sched->nr_lost_events) | |
0ec04e16 IM |
1506 | printf(" (due to lost events?)"); |
1507 | printf("\n"); | |
1508 | } | |
1509 | } | |
1510 | ||
0e9b07e5 | 1511 | static int perf_sched__lat(struct perf_sched *sched) |
0ec04e16 IM |
1512 | { |
1513 | struct rb_node *next; | |
4c09bafa | 1514 | struct perf_session *session; |
0ec04e16 IM |
1515 | |
1516 | setup_pager(); | |
ad9def7c DA |
1517 | |
1518 | /* save session -- references to threads are held in work_list */ | |
1519 | if (perf_sched__read_events(sched, &session)) | |
a116e05d | 1520 | return -1; |
ad9def7c | 1521 | |
0e9b07e5 | 1522 | perf_sched__sort_lat(sched); |
0ec04e16 | 1523 | |
3786310a FW |
1524 | printf("\n ---------------------------------------------------------------------------------------------------------------\n"); |
1525 | printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n"); | |
1526 | printf(" ---------------------------------------------------------------------------------------------------------------\n"); | |
0ec04e16 | 1527 | |
0e9b07e5 | 1528 | next = rb_first(&sched->sorted_atom_root); |
0ec04e16 IM |
1529 | |
1530 | while (next) { | |
1531 | struct work_atoms *work_list; | |
1532 | ||
1533 | work_list = rb_entry(next, struct work_atoms, node); | |
0e9b07e5 | 1534 | output_lat_thread(sched, work_list); |
0ec04e16 IM |
1535 | next = rb_next(next); |
1536 | } | |
1537 | ||
1538 | printf(" -----------------------------------------------------------------------------------------\n"); | |
9486aa38 | 1539 | printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n", |
0e9b07e5 | 1540 | (double)sched->all_runtime / 1e6, sched->all_count); |
0ec04e16 IM |
1541 | |
1542 | printf(" ---------------------------------------------------\n"); | |
1543 | ||
0e9b07e5 | 1544 | print_bad_events(sched); |
0ec04e16 IM |
1545 | printf("\n"); |
1546 | ||
4c09bafa | 1547 | perf_session__delete(session); |
a116e05d | 1548 | return 0; |
0ec04e16 IM |
1549 | } |
1550 | ||
0e9b07e5 | 1551 | static int perf_sched__map(struct perf_sched *sched) |
0ec04e16 | 1552 | { |
0e9b07e5 | 1553 | sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF); |
40749d0f | 1554 | |
0ec04e16 | 1555 | setup_pager(); |
ad9def7c | 1556 | if (perf_sched__read_events(sched, NULL)) |
a116e05d | 1557 | return -1; |
0e9b07e5 | 1558 | print_bad_events(sched); |
a116e05d | 1559 | return 0; |
0ec04e16 IM |
1560 | } |
1561 | ||
0e9b07e5 | 1562 | static int perf_sched__replay(struct perf_sched *sched) |
0ec04e16 IM |
1563 | { |
1564 | unsigned long i; | |
1565 | ||
0e9b07e5 ACM |
1566 | calibrate_run_measurement_overhead(sched); |
1567 | calibrate_sleep_measurement_overhead(sched); | |
0ec04e16 | 1568 | |
0e9b07e5 | 1569 | test_calibrations(sched); |
0ec04e16 | 1570 | |
ad9def7c | 1571 | if (perf_sched__read_events(sched, NULL)) |
a116e05d | 1572 | return -1; |
0ec04e16 | 1573 | |
0e9b07e5 ACM |
1574 | printf("nr_run_events: %ld\n", sched->nr_run_events); |
1575 | printf("nr_sleep_events: %ld\n", sched->nr_sleep_events); | |
1576 | printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events); | |
0ec04e16 | 1577 | |
0e9b07e5 ACM |
1578 | if (sched->targetless_wakeups) |
1579 | printf("target-less wakeups: %ld\n", sched->targetless_wakeups); | |
1580 | if (sched->multitarget_wakeups) | |
1581 | printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups); | |
1582 | if (sched->nr_run_events_optimized) | |
0ec04e16 | 1583 | printf("run atoms optimized: %ld\n", |
0e9b07e5 | 1584 | sched->nr_run_events_optimized); |
0ec04e16 | 1585 | |
0e9b07e5 ACM |
1586 | print_task_traces(sched); |
1587 | add_cross_task_wakeups(sched); | |
0ec04e16 | 1588 | |
0e9b07e5 | 1589 | create_tasks(sched); |
0ec04e16 | 1590 | printf("------------------------------------------------------------\n"); |
0e9b07e5 ACM |
1591 | for (i = 0; i < sched->replay_repeat; i++) |
1592 | run_one_test(sched); | |
a116e05d ACM |
1593 | |
1594 | return 0; | |
0ec04e16 IM |
1595 | } |
1596 | ||
0e9b07e5 ACM |
1597 | static void setup_sorting(struct perf_sched *sched, const struct option *options, |
1598 | const char * const usage_msg[]) | |
daa1d7a5 | 1599 | { |
0e9b07e5 | 1600 | char *tmp, *tok, *str = strdup(sched->sort_order); |
daa1d7a5 FW |
1601 | |
1602 | for (tok = strtok_r(str, ", ", &tmp); | |
1603 | tok; tok = strtok_r(NULL, ", ", &tmp)) { | |
0e9b07e5 | 1604 | if (sort_dimension__add(tok, &sched->sort_list) < 0) { |
daa1d7a5 | 1605 | error("Unknown --sort key: `%s'", tok); |
0e9b07e5 | 1606 | usage_with_options(usage_msg, options); |
daa1d7a5 FW |
1607 | } |
1608 | } | |
1609 | ||
1610 | free(str); | |
1611 | ||
0e9b07e5 | 1612 | sort_dimension__add("pid", &sched->cmp_pid); |
daa1d7a5 FW |
1613 | } |
1614 | ||
1fc35b29 IM |
1615 | static int __cmd_record(int argc, const char **argv) |
1616 | { | |
1617 | unsigned int rec_argc, i, j; | |
1618 | const char **rec_argv; | |
0e9b07e5 ACM |
1619 | const char * const record_args[] = { |
1620 | "record", | |
1621 | "-a", | |
1622 | "-R", | |
0e9b07e5 ACM |
1623 | "-m", "1024", |
1624 | "-c", "1", | |
1625 | "-e", "sched:sched_switch", | |
1626 | "-e", "sched:sched_stat_wait", | |
1627 | "-e", "sched:sched_stat_sleep", | |
1628 | "-e", "sched:sched_stat_iowait", | |
1629 | "-e", "sched:sched_stat_runtime", | |
0e9b07e5 ACM |
1630 | "-e", "sched:sched_process_fork", |
1631 | "-e", "sched:sched_wakeup", | |
1632 | "-e", "sched:sched_migrate_task", | |
1633 | }; | |
1fc35b29 IM |
1634 | |
1635 | rec_argc = ARRAY_SIZE(record_args) + argc - 1; | |
1636 | rec_argv = calloc(rec_argc + 1, sizeof(char *)); | |
1637 | ||
e462dc55 | 1638 | if (rec_argv == NULL) |
ce47dc56 CS |
1639 | return -ENOMEM; |
1640 | ||
1fc35b29 IM |
1641 | for (i = 0; i < ARRAY_SIZE(record_args); i++) |
1642 | rec_argv[i] = strdup(record_args[i]); | |
1643 | ||
1644 | for (j = 1; j < (unsigned int)argc; j++, i++) | |
1645 | rec_argv[i] = argv[j]; | |
1646 | ||
1647 | BUG_ON(i != rec_argc); | |
1648 | ||
1649 | return cmd_record(i, rec_argv, NULL); | |
1650 | } | |
1651 | ||
f36f83f9 NK |
1652 | static const char default_sort_order[] = "avg, max, switch, runtime"; |
1653 | static struct perf_sched sched = { | |
1654 | .tool = { | |
1655 | .sample = perf_sched__process_tracepoint_sample, | |
1656 | .comm = perf_event__process_comm, | |
1657 | .lost = perf_event__process_lost, | |
cb627505 | 1658 | .fork = perf_sched__process_fork_event, |
f36f83f9 NK |
1659 | .ordered_samples = true, |
1660 | }, | |
1661 | .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid), | |
1662 | .sort_list = LIST_HEAD_INIT(sched.sort_list), | |
1663 | .start_work_mutex = PTHREAD_MUTEX_INITIALIZER, | |
1664 | .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER, | |
1665 | .curr_pid = { [0 ... MAX_CPUS - 1] = -1 }, | |
1666 | .sort_order = default_sort_order, | |
1667 | .replay_repeat = 10, | |
1668 | .profile_cpu = -1, | |
1669 | .next_shortname1 = 'A', | |
1670 | .next_shortname2 = '0', | |
1671 | }; | |
1672 | ||
1d037ca1 | 1673 | int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused) |
0a02ad93 | 1674 | { |
0e9b07e5 ACM |
1675 | const struct option latency_options[] = { |
1676 | OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]", | |
1677 | "sort by key(s): runtime, switch, avg, max"), | |
1678 | OPT_INCR('v', "verbose", &verbose, | |
1679 | "be more verbose (show symbol address, etc)"), | |
1680 | OPT_INTEGER('C', "CPU", &sched.profile_cpu, | |
1681 | "CPU to profile on"), | |
1682 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, | |
1683 | "dump raw trace in ASCII"), | |
1684 | OPT_END() | |
1685 | }; | |
1686 | const struct option replay_options[] = { | |
1687 | OPT_UINTEGER('r', "repeat", &sched.replay_repeat, | |
1688 | "repeat the workload replay N times (-1: infinite)"), | |
1689 | OPT_INCR('v', "verbose", &verbose, | |
1690 | "be more verbose (show symbol address, etc)"), | |
1691 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, | |
1692 | "dump raw trace in ASCII"), | |
1693 | OPT_END() | |
1694 | }; | |
1695 | const struct option sched_options[] = { | |
70cb4e96 | 1696 | OPT_STRING('i', "input", &input_name, "file", |
0e9b07e5 ACM |
1697 | "input file name"), |
1698 | OPT_INCR('v', "verbose", &verbose, | |
1699 | "be more verbose (show symbol address, etc)"), | |
1700 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, | |
1701 | "dump raw trace in ASCII"), | |
1702 | OPT_END() | |
1703 | }; | |
1704 | const char * const latency_usage[] = { | |
1705 | "perf sched latency [<options>]", | |
1706 | NULL | |
1707 | }; | |
1708 | const char * const replay_usage[] = { | |
1709 | "perf sched replay [<options>]", | |
1710 | NULL | |
1711 | }; | |
1712 | const char * const sched_usage[] = { | |
1713 | "perf sched [<options>] {record|latency|map|replay|script}", | |
1714 | NULL | |
1715 | }; | |
1716 | struct trace_sched_handler lat_ops = { | |
1717 | .wakeup_event = latency_wakeup_event, | |
1718 | .switch_event = latency_switch_event, | |
1719 | .runtime_event = latency_runtime_event, | |
0e9b07e5 ACM |
1720 | .migrate_task_event = latency_migrate_task_event, |
1721 | }; | |
1722 | struct trace_sched_handler map_ops = { | |
1723 | .switch_event = map_switch_event, | |
1724 | }; | |
1725 | struct trace_sched_handler replay_ops = { | |
1726 | .wakeup_event = replay_wakeup_event, | |
1727 | .switch_event = replay_switch_event, | |
1728 | .fork_event = replay_fork_event, | |
1729 | }; | |
1730 | ||
f2858d8a IM |
1731 | argc = parse_options(argc, argv, sched_options, sched_usage, |
1732 | PARSE_OPT_STOP_AT_NON_OPTION); | |
1733 | if (!argc) | |
1734 | usage_with_options(sched_usage, sched_options); | |
0a02ad93 | 1735 | |
c0777c5a | 1736 | /* |
133dc4c3 | 1737 | * Aliased to 'perf script' for now: |
c0777c5a | 1738 | */ |
133dc4c3 IM |
1739 | if (!strcmp(argv[0], "script")) |
1740 | return cmd_script(argc, argv, prefix); | |
c0777c5a | 1741 | |
75be6cf4 | 1742 | symbol__init(); |
1fc35b29 IM |
1743 | if (!strncmp(argv[0], "rec", 3)) { |
1744 | return __cmd_record(argc, argv); | |
1745 | } else if (!strncmp(argv[0], "lat", 3)) { | |
0e9b07e5 | 1746 | sched.tp_handler = &lat_ops; |
f2858d8a IM |
1747 | if (argc > 1) { |
1748 | argc = parse_options(argc, argv, latency_options, latency_usage, 0); | |
1749 | if (argc) | |
1750 | usage_with_options(latency_usage, latency_options); | |
f2858d8a | 1751 | } |
0e9b07e5 ACM |
1752 | setup_sorting(&sched, latency_options, latency_usage); |
1753 | return perf_sched__lat(&sched); | |
0ec04e16 | 1754 | } else if (!strcmp(argv[0], "map")) { |
0e9b07e5 ACM |
1755 | sched.tp_handler = &map_ops; |
1756 | setup_sorting(&sched, latency_options, latency_usage); | |
1757 | return perf_sched__map(&sched); | |
f2858d8a | 1758 | } else if (!strncmp(argv[0], "rep", 3)) { |
0e9b07e5 | 1759 | sched.tp_handler = &replay_ops; |
f2858d8a IM |
1760 | if (argc) { |
1761 | argc = parse_options(argc, argv, replay_options, replay_usage, 0); | |
1762 | if (argc) | |
1763 | usage_with_options(replay_usage, replay_options); | |
1764 | } | |
0e9b07e5 | 1765 | return perf_sched__replay(&sched); |
f2858d8a IM |
1766 | } else { |
1767 | usage_with_options(sched_usage, sched_options); | |
1768 | } | |
1769 | ||
ec156764 | 1770 | return 0; |
0a02ad93 | 1771 | } |