| 1 | #include "builtin.h" |
| 2 | #include "perf.h" |
| 3 | |
| 4 | #include "util/util.h" |
| 5 | #include "util/evlist.h" |
| 6 | #include "util/cache.h" |
| 7 | #include "util/evsel.h" |
| 8 | #include "util/symbol.h" |
| 9 | #include "util/thread.h" |
| 10 | #include "util/header.h" |
| 11 | #include "util/session.h" |
| 12 | #include "util/tool.h" |
| 13 | |
| 14 | #include "util/parse-options.h" |
| 15 | #include "util/trace-event.h" |
| 16 | |
| 17 | #include "util/debug.h" |
| 18 | |
| 19 | #include <sys/prctl.h> |
| 20 | #include <sys/resource.h> |
| 21 | |
| 22 | #include <semaphore.h> |
| 23 | #include <pthread.h> |
| 24 | #include <math.h> |
| 25 | |
| 26 | #define PR_SET_NAME 15 /* Set process name */ |
| 27 | #define MAX_CPUS 4096 |
| 28 | #define COMM_LEN 20 |
| 29 | #define SYM_LEN 129 |
| 30 | #define MAX_PID 65536 |
| 31 | |
| 32 | struct sched_atom; |
| 33 | |
| 34 | struct task_desc { |
| 35 | unsigned long nr; |
| 36 | unsigned long pid; |
| 37 | char comm[COMM_LEN]; |
| 38 | |
| 39 | unsigned long nr_events; |
| 40 | unsigned long curr_event; |
| 41 | struct sched_atom **atoms; |
| 42 | |
| 43 | pthread_t thread; |
| 44 | sem_t sleep_sem; |
| 45 | |
| 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, |
| 56 | SCHED_EVENT_MIGRATION, |
| 57 | }; |
| 58 | |
| 59 | struct sched_atom { |
| 60 | enum sched_event_type type; |
| 61 | int specific_wait; |
| 62 | u64 timestamp; |
| 63 | u64 duration; |
| 64 | unsigned long nr; |
| 65 | sem_t *wait_sem; |
| 66 | struct task_desc *wakee; |
| 67 | }; |
| 68 | |
| 69 | #define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP" |
| 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; |
| 81 | u64 sched_out_time; |
| 82 | u64 wake_up_time; |
| 83 | u64 sched_in_time; |
| 84 | u64 runtime; |
| 85 | }; |
| 86 | |
| 87 | struct work_atoms { |
| 88 | struct list_head work_list; |
| 89 | struct thread *thread; |
| 90 | struct rb_node node; |
| 91 | u64 max_lat; |
| 92 | u64 max_lat_at; |
| 93 | u64 total_lat; |
| 94 | u64 nb_atoms; |
| 95 | u64 total_runtime; |
| 96 | }; |
| 97 | |
| 98 | typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *); |
| 99 | |
| 100 | struct perf_sched; |
| 101 | |
| 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); |
| 105 | |
| 106 | int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel, |
| 107 | struct perf_sample *sample, struct machine *machine); |
| 108 | |
| 109 | int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel, |
| 110 | struct perf_sample *sample, struct machine *machine); |
| 111 | |
| 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); |
| 115 | |
| 116 | int (*migrate_task_event)(struct perf_sched *sched, |
| 117 | struct perf_evsel *evsel, |
| 118 | struct perf_sample *sample, |
| 119 | struct machine *machine); |
| 120 | }; |
| 121 | |
| 122 | struct perf_sched { |
| 123 | struct perf_tool tool; |
| 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_context_switch_bugs; |
| 153 | unsigned long nr_events; |
| 154 | unsigned long nr_lost_chunks; |
| 155 | unsigned long nr_lost_events; |
| 156 | u64 run_measurement_overhead; |
| 157 | u64 sleep_measurement_overhead; |
| 158 | u64 start_time; |
| 159 | u64 cpu_usage; |
| 160 | u64 runavg_cpu_usage; |
| 161 | u64 parent_cpu_usage; |
| 162 | u64 runavg_parent_cpu_usage; |
| 163 | u64 sum_runtime; |
| 164 | u64 sum_fluct; |
| 165 | u64 run_avg; |
| 166 | u64 all_runtime; |
| 167 | u64 all_count; |
| 168 | u64 cpu_last_switched[MAX_CPUS]; |
| 169 | struct rb_root atom_root, sorted_atom_root; |
| 170 | struct list_head sort_list, cmp_pid; |
| 171 | }; |
| 172 | |
| 173 | static u64 get_nsecs(void) |
| 174 | { |
| 175 | struct timespec ts; |
| 176 | |
| 177 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 178 | |
| 179 | return ts.tv_sec * 1000000000ULL + ts.tv_nsec; |
| 180 | } |
| 181 | |
| 182 | static void burn_nsecs(struct perf_sched *sched, u64 nsecs) |
| 183 | { |
| 184 | u64 T0 = get_nsecs(), T1; |
| 185 | |
| 186 | do { |
| 187 | T1 = get_nsecs(); |
| 188 | } while (T1 + sched->run_measurement_overhead < T0 + nsecs); |
| 189 | } |
| 190 | |
| 191 | static void sleep_nsecs(u64 nsecs) |
| 192 | { |
| 193 | struct timespec ts; |
| 194 | |
| 195 | ts.tv_nsec = nsecs % 999999999; |
| 196 | ts.tv_sec = nsecs / 999999999; |
| 197 | |
| 198 | nanosleep(&ts, NULL); |
| 199 | } |
| 200 | |
| 201 | static void calibrate_run_measurement_overhead(struct perf_sched *sched) |
| 202 | { |
| 203 | u64 T0, T1, delta, min_delta = 1000000000ULL; |
| 204 | int i; |
| 205 | |
| 206 | for (i = 0; i < 10; i++) { |
| 207 | T0 = get_nsecs(); |
| 208 | burn_nsecs(sched, 0); |
| 209 | T1 = get_nsecs(); |
| 210 | delta = T1-T0; |
| 211 | min_delta = min(min_delta, delta); |
| 212 | } |
| 213 | sched->run_measurement_overhead = min_delta; |
| 214 | |
| 215 | printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta); |
| 216 | } |
| 217 | |
| 218 | static void calibrate_sleep_measurement_overhead(struct perf_sched *sched) |
| 219 | { |
| 220 | u64 T0, T1, delta, min_delta = 1000000000ULL; |
| 221 | int i; |
| 222 | |
| 223 | for (i = 0; i < 10; i++) { |
| 224 | T0 = get_nsecs(); |
| 225 | sleep_nsecs(10000); |
| 226 | T1 = get_nsecs(); |
| 227 | delta = T1-T0; |
| 228 | min_delta = min(min_delta, delta); |
| 229 | } |
| 230 | min_delta -= 10000; |
| 231 | sched->sleep_measurement_overhead = min_delta; |
| 232 | |
| 233 | printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta); |
| 234 | } |
| 235 | |
| 236 | static struct sched_atom * |
| 237 | get_new_event(struct task_desc *task, u64 timestamp) |
| 238 | { |
| 239 | struct sched_atom *event = zalloc(sizeof(*event)); |
| 240 | unsigned long idx = task->nr_events; |
| 241 | size_t size; |
| 242 | |
| 243 | event->timestamp = timestamp; |
| 244 | event->nr = idx; |
| 245 | |
| 246 | task->nr_events++; |
| 247 | size = sizeof(struct sched_atom *) * task->nr_events; |
| 248 | task->atoms = realloc(task->atoms, size); |
| 249 | BUG_ON(!task->atoms); |
| 250 | |
| 251 | task->atoms[idx] = event; |
| 252 | |
| 253 | return event; |
| 254 | } |
| 255 | |
| 256 | static struct sched_atom *last_event(struct task_desc *task) |
| 257 | { |
| 258 | if (!task->nr_events) |
| 259 | return NULL; |
| 260 | |
| 261 | return task->atoms[task->nr_events - 1]; |
| 262 | } |
| 263 | |
| 264 | static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task, |
| 265 | u64 timestamp, u64 duration) |
| 266 | { |
| 267 | struct sched_atom *event, *curr_event = last_event(task); |
| 268 | |
| 269 | /* |
| 270 | * optimize an existing RUN event by merging this one |
| 271 | * to it: |
| 272 | */ |
| 273 | if (curr_event && curr_event->type == SCHED_EVENT_RUN) { |
| 274 | sched->nr_run_events_optimized++; |
| 275 | curr_event->duration += duration; |
| 276 | return; |
| 277 | } |
| 278 | |
| 279 | event = get_new_event(task, timestamp); |
| 280 | |
| 281 | event->type = SCHED_EVENT_RUN; |
| 282 | event->duration = duration; |
| 283 | |
| 284 | sched->nr_run_events++; |
| 285 | } |
| 286 | |
| 287 | static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task, |
| 288 | u64 timestamp, struct task_desc *wakee) |
| 289 | { |
| 290 | struct sched_atom *event, *wakee_event; |
| 291 | |
| 292 | event = get_new_event(task, timestamp); |
| 293 | event->type = SCHED_EVENT_WAKEUP; |
| 294 | event->wakee = wakee; |
| 295 | |
| 296 | wakee_event = last_event(wakee); |
| 297 | if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) { |
| 298 | sched->targetless_wakeups++; |
| 299 | return; |
| 300 | } |
| 301 | if (wakee_event->wait_sem) { |
| 302 | sched->multitarget_wakeups++; |
| 303 | return; |
| 304 | } |
| 305 | |
| 306 | wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem)); |
| 307 | sem_init(wakee_event->wait_sem, 0, 0); |
| 308 | wakee_event->specific_wait = 1; |
| 309 | event->wait_sem = wakee_event->wait_sem; |
| 310 | |
| 311 | sched->nr_wakeup_events++; |
| 312 | } |
| 313 | |
| 314 | static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task, |
| 315 | u64 timestamp, u64 task_state __maybe_unused) |
| 316 | { |
| 317 | struct sched_atom *event = get_new_event(task, timestamp); |
| 318 | |
| 319 | event->type = SCHED_EVENT_SLEEP; |
| 320 | |
| 321 | sched->nr_sleep_events++; |
| 322 | } |
| 323 | |
| 324 | static struct task_desc *register_pid(struct perf_sched *sched, |
| 325 | unsigned long pid, const char *comm) |
| 326 | { |
| 327 | struct task_desc *task; |
| 328 | |
| 329 | BUG_ON(pid >= MAX_PID); |
| 330 | |
| 331 | task = sched->pid_to_task[pid]; |
| 332 | |
| 333 | if (task) |
| 334 | return task; |
| 335 | |
| 336 | task = zalloc(sizeof(*task)); |
| 337 | task->pid = pid; |
| 338 | task->nr = sched->nr_tasks; |
| 339 | strcpy(task->comm, comm); |
| 340 | /* |
| 341 | * every task starts in sleeping state - this gets ignored |
| 342 | * if there's no wakeup pointing to this sleep state: |
| 343 | */ |
| 344 | add_sched_event_sleep(sched, task, 0, 0); |
| 345 | |
| 346 | sched->pid_to_task[pid] = task; |
| 347 | sched->nr_tasks++; |
| 348 | sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_task *)); |
| 349 | BUG_ON(!sched->tasks); |
| 350 | sched->tasks[task->nr] = task; |
| 351 | |
| 352 | if (verbose) |
| 353 | printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm); |
| 354 | |
| 355 | return task; |
| 356 | } |
| 357 | |
| 358 | |
| 359 | static void print_task_traces(struct perf_sched *sched) |
| 360 | { |
| 361 | struct task_desc *task; |
| 362 | unsigned long i; |
| 363 | |
| 364 | for (i = 0; i < sched->nr_tasks; i++) { |
| 365 | task = sched->tasks[i]; |
| 366 | printf("task %6ld (%20s:%10ld), nr_events: %ld\n", |
| 367 | task->nr, task->comm, task->pid, task->nr_events); |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | static void add_cross_task_wakeups(struct perf_sched *sched) |
| 372 | { |
| 373 | struct task_desc *task1, *task2; |
| 374 | unsigned long i, j; |
| 375 | |
| 376 | for (i = 0; i < sched->nr_tasks; i++) { |
| 377 | task1 = sched->tasks[i]; |
| 378 | j = i + 1; |
| 379 | if (j == sched->nr_tasks) |
| 380 | j = 0; |
| 381 | task2 = sched->tasks[j]; |
| 382 | add_sched_event_wakeup(sched, task1, 0, task2); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | static void perf_sched__process_event(struct perf_sched *sched, |
| 387 | struct sched_atom *atom) |
| 388 | { |
| 389 | int ret = 0; |
| 390 | |
| 391 | switch (atom->type) { |
| 392 | case SCHED_EVENT_RUN: |
| 393 | burn_nsecs(sched, atom->duration); |
| 394 | break; |
| 395 | case SCHED_EVENT_SLEEP: |
| 396 | if (atom->wait_sem) |
| 397 | ret = sem_wait(atom->wait_sem); |
| 398 | BUG_ON(ret); |
| 399 | break; |
| 400 | case SCHED_EVENT_WAKEUP: |
| 401 | if (atom->wait_sem) |
| 402 | ret = sem_post(atom->wait_sem); |
| 403 | BUG_ON(ret); |
| 404 | break; |
| 405 | case SCHED_EVENT_MIGRATION: |
| 406 | break; |
| 407 | default: |
| 408 | BUG_ON(1); |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | static u64 get_cpu_usage_nsec_parent(void) |
| 413 | { |
| 414 | struct rusage ru; |
| 415 | u64 sum; |
| 416 | int err; |
| 417 | |
| 418 | err = getrusage(RUSAGE_SELF, &ru); |
| 419 | BUG_ON(err); |
| 420 | |
| 421 | sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3; |
| 422 | sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3; |
| 423 | |
| 424 | return sum; |
| 425 | } |
| 426 | |
| 427 | static int self_open_counters(void) |
| 428 | { |
| 429 | struct perf_event_attr attr; |
| 430 | int fd; |
| 431 | |
| 432 | memset(&attr, 0, sizeof(attr)); |
| 433 | |
| 434 | attr.type = PERF_TYPE_SOFTWARE; |
| 435 | attr.config = PERF_COUNT_SW_TASK_CLOCK; |
| 436 | |
| 437 | fd = sys_perf_event_open(&attr, 0, -1, -1, 0); |
| 438 | |
| 439 | if (fd < 0) |
| 440 | pr_err("Error: sys_perf_event_open() syscall returned " |
| 441 | "with %d (%s)\n", fd, strerror(errno)); |
| 442 | return fd; |
| 443 | } |
| 444 | |
| 445 | static u64 get_cpu_usage_nsec_self(int fd) |
| 446 | { |
| 447 | u64 runtime; |
| 448 | int ret; |
| 449 | |
| 450 | ret = read(fd, &runtime, sizeof(runtime)); |
| 451 | BUG_ON(ret != sizeof(runtime)); |
| 452 | |
| 453 | return runtime; |
| 454 | } |
| 455 | |
| 456 | struct sched_thread_parms { |
| 457 | struct task_desc *task; |
| 458 | struct perf_sched *sched; |
| 459 | }; |
| 460 | |
| 461 | static void *thread_func(void *ctx) |
| 462 | { |
| 463 | struct sched_thread_parms *parms = ctx; |
| 464 | struct task_desc *this_task = parms->task; |
| 465 | struct perf_sched *sched = parms->sched; |
| 466 | u64 cpu_usage_0, cpu_usage_1; |
| 467 | unsigned long i, ret; |
| 468 | char comm2[22]; |
| 469 | int fd; |
| 470 | |
| 471 | zfree(&parms); |
| 472 | |
| 473 | sprintf(comm2, ":%s", this_task->comm); |
| 474 | prctl(PR_SET_NAME, comm2); |
| 475 | fd = self_open_counters(); |
| 476 | if (fd < 0) |
| 477 | return NULL; |
| 478 | again: |
| 479 | ret = sem_post(&this_task->ready_for_work); |
| 480 | BUG_ON(ret); |
| 481 | ret = pthread_mutex_lock(&sched->start_work_mutex); |
| 482 | BUG_ON(ret); |
| 483 | ret = pthread_mutex_unlock(&sched->start_work_mutex); |
| 484 | BUG_ON(ret); |
| 485 | |
| 486 | cpu_usage_0 = get_cpu_usage_nsec_self(fd); |
| 487 | |
| 488 | for (i = 0; i < this_task->nr_events; i++) { |
| 489 | this_task->curr_event = i; |
| 490 | perf_sched__process_event(sched, this_task->atoms[i]); |
| 491 | } |
| 492 | |
| 493 | cpu_usage_1 = get_cpu_usage_nsec_self(fd); |
| 494 | this_task->cpu_usage = cpu_usage_1 - cpu_usage_0; |
| 495 | ret = sem_post(&this_task->work_done_sem); |
| 496 | BUG_ON(ret); |
| 497 | |
| 498 | ret = pthread_mutex_lock(&sched->work_done_wait_mutex); |
| 499 | BUG_ON(ret); |
| 500 | ret = pthread_mutex_unlock(&sched->work_done_wait_mutex); |
| 501 | BUG_ON(ret); |
| 502 | |
| 503 | goto again; |
| 504 | } |
| 505 | |
| 506 | static void create_tasks(struct perf_sched *sched) |
| 507 | { |
| 508 | struct task_desc *task; |
| 509 | pthread_attr_t attr; |
| 510 | unsigned long i; |
| 511 | int err; |
| 512 | |
| 513 | err = pthread_attr_init(&attr); |
| 514 | BUG_ON(err); |
| 515 | err = pthread_attr_setstacksize(&attr, |
| 516 | (size_t) max(16 * 1024, PTHREAD_STACK_MIN)); |
| 517 | BUG_ON(err); |
| 518 | err = pthread_mutex_lock(&sched->start_work_mutex); |
| 519 | BUG_ON(err); |
| 520 | err = pthread_mutex_lock(&sched->work_done_wait_mutex); |
| 521 | BUG_ON(err); |
| 522 | for (i = 0; i < sched->nr_tasks; i++) { |
| 523 | struct sched_thread_parms *parms = malloc(sizeof(*parms)); |
| 524 | BUG_ON(parms == NULL); |
| 525 | parms->task = task = sched->tasks[i]; |
| 526 | parms->sched = sched; |
| 527 | sem_init(&task->sleep_sem, 0, 0); |
| 528 | sem_init(&task->ready_for_work, 0, 0); |
| 529 | sem_init(&task->work_done_sem, 0, 0); |
| 530 | task->curr_event = 0; |
| 531 | err = pthread_create(&task->thread, &attr, thread_func, parms); |
| 532 | BUG_ON(err); |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | static void wait_for_tasks(struct perf_sched *sched) |
| 537 | { |
| 538 | u64 cpu_usage_0, cpu_usage_1; |
| 539 | struct task_desc *task; |
| 540 | unsigned long i, ret; |
| 541 | |
| 542 | sched->start_time = get_nsecs(); |
| 543 | sched->cpu_usage = 0; |
| 544 | pthread_mutex_unlock(&sched->work_done_wait_mutex); |
| 545 | |
| 546 | for (i = 0; i < sched->nr_tasks; i++) { |
| 547 | task = sched->tasks[i]; |
| 548 | ret = sem_wait(&task->ready_for_work); |
| 549 | BUG_ON(ret); |
| 550 | sem_init(&task->ready_for_work, 0, 0); |
| 551 | } |
| 552 | ret = pthread_mutex_lock(&sched->work_done_wait_mutex); |
| 553 | BUG_ON(ret); |
| 554 | |
| 555 | cpu_usage_0 = get_cpu_usage_nsec_parent(); |
| 556 | |
| 557 | pthread_mutex_unlock(&sched->start_work_mutex); |
| 558 | |
| 559 | for (i = 0; i < sched->nr_tasks; i++) { |
| 560 | task = sched->tasks[i]; |
| 561 | ret = sem_wait(&task->work_done_sem); |
| 562 | BUG_ON(ret); |
| 563 | sem_init(&task->work_done_sem, 0, 0); |
| 564 | sched->cpu_usage += task->cpu_usage; |
| 565 | task->cpu_usage = 0; |
| 566 | } |
| 567 | |
| 568 | cpu_usage_1 = get_cpu_usage_nsec_parent(); |
| 569 | if (!sched->runavg_cpu_usage) |
| 570 | sched->runavg_cpu_usage = sched->cpu_usage; |
| 571 | sched->runavg_cpu_usage = (sched->runavg_cpu_usage * 9 + sched->cpu_usage) / 10; |
| 572 | |
| 573 | sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0; |
| 574 | if (!sched->runavg_parent_cpu_usage) |
| 575 | sched->runavg_parent_cpu_usage = sched->parent_cpu_usage; |
| 576 | sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * 9 + |
| 577 | sched->parent_cpu_usage)/10; |
| 578 | |
| 579 | ret = pthread_mutex_lock(&sched->start_work_mutex); |
| 580 | BUG_ON(ret); |
| 581 | |
| 582 | for (i = 0; i < sched->nr_tasks; i++) { |
| 583 | task = sched->tasks[i]; |
| 584 | sem_init(&task->sleep_sem, 0, 0); |
| 585 | task->curr_event = 0; |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | static void run_one_test(struct perf_sched *sched) |
| 590 | { |
| 591 | u64 T0, T1, delta, avg_delta, fluct; |
| 592 | |
| 593 | T0 = get_nsecs(); |
| 594 | wait_for_tasks(sched); |
| 595 | T1 = get_nsecs(); |
| 596 | |
| 597 | delta = T1 - T0; |
| 598 | sched->sum_runtime += delta; |
| 599 | sched->nr_runs++; |
| 600 | |
| 601 | avg_delta = sched->sum_runtime / sched->nr_runs; |
| 602 | if (delta < avg_delta) |
| 603 | fluct = avg_delta - delta; |
| 604 | else |
| 605 | fluct = delta - avg_delta; |
| 606 | sched->sum_fluct += fluct; |
| 607 | if (!sched->run_avg) |
| 608 | sched->run_avg = delta; |
| 609 | sched->run_avg = (sched->run_avg * 9 + delta) / 10; |
| 610 | |
| 611 | printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0); |
| 612 | |
| 613 | printf("ravg: %0.2f, ", (double)sched->run_avg / 1e6); |
| 614 | |
| 615 | printf("cpu: %0.2f / %0.2f", |
| 616 | (double)sched->cpu_usage / 1e6, (double)sched->runavg_cpu_usage / 1e6); |
| 617 | |
| 618 | #if 0 |
| 619 | /* |
| 620 | * rusage statistics done by the parent, these are less |
| 621 | * accurate than the sched->sum_exec_runtime based statistics: |
| 622 | */ |
| 623 | printf(" [%0.2f / %0.2f]", |
| 624 | (double)sched->parent_cpu_usage/1e6, |
| 625 | (double)sched->runavg_parent_cpu_usage/1e6); |
| 626 | #endif |
| 627 | |
| 628 | printf("\n"); |
| 629 | |
| 630 | if (sched->nr_sleep_corrections) |
| 631 | printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections); |
| 632 | sched->nr_sleep_corrections = 0; |
| 633 | } |
| 634 | |
| 635 | static void test_calibrations(struct perf_sched *sched) |
| 636 | { |
| 637 | u64 T0, T1; |
| 638 | |
| 639 | T0 = get_nsecs(); |
| 640 | burn_nsecs(sched, 1e6); |
| 641 | T1 = get_nsecs(); |
| 642 | |
| 643 | printf("the run test took %" PRIu64 " nsecs\n", T1 - T0); |
| 644 | |
| 645 | T0 = get_nsecs(); |
| 646 | sleep_nsecs(1e6); |
| 647 | T1 = get_nsecs(); |
| 648 | |
| 649 | printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0); |
| 650 | } |
| 651 | |
| 652 | static int |
| 653 | replay_wakeup_event(struct perf_sched *sched, |
| 654 | struct perf_evsel *evsel, struct perf_sample *sample, |
| 655 | struct machine *machine __maybe_unused) |
| 656 | { |
| 657 | const char *comm = perf_evsel__strval(evsel, sample, "comm"); |
| 658 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"); |
| 659 | struct task_desc *waker, *wakee; |
| 660 | |
| 661 | if (verbose) { |
| 662 | printf("sched_wakeup event %p\n", evsel); |
| 663 | |
| 664 | printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid); |
| 665 | } |
| 666 | |
| 667 | waker = register_pid(sched, sample->tid, "<unknown>"); |
| 668 | wakee = register_pid(sched, pid, comm); |
| 669 | |
| 670 | add_sched_event_wakeup(sched, waker, sample->time, wakee); |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | static int replay_switch_event(struct perf_sched *sched, |
| 675 | struct perf_evsel *evsel, |
| 676 | struct perf_sample *sample, |
| 677 | struct machine *machine __maybe_unused) |
| 678 | { |
| 679 | const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"), |
| 680 | *next_comm = perf_evsel__strval(evsel, sample, "next_comm"); |
| 681 | const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), |
| 682 | next_pid = perf_evsel__intval(evsel, sample, "next_pid"); |
| 683 | const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state"); |
| 684 | struct task_desc *prev, __maybe_unused *next; |
| 685 | u64 timestamp0, timestamp = sample->time; |
| 686 | int cpu = sample->cpu; |
| 687 | s64 delta; |
| 688 | |
| 689 | if (verbose) |
| 690 | printf("sched_switch event %p\n", evsel); |
| 691 | |
| 692 | if (cpu >= MAX_CPUS || cpu < 0) |
| 693 | return 0; |
| 694 | |
| 695 | timestamp0 = sched->cpu_last_switched[cpu]; |
| 696 | if (timestamp0) |
| 697 | delta = timestamp - timestamp0; |
| 698 | else |
| 699 | delta = 0; |
| 700 | |
| 701 | if (delta < 0) { |
| 702 | pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); |
| 703 | return -1; |
| 704 | } |
| 705 | |
| 706 | pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n", |
| 707 | prev_comm, prev_pid, next_comm, next_pid, delta); |
| 708 | |
| 709 | prev = register_pid(sched, prev_pid, prev_comm); |
| 710 | next = register_pid(sched, next_pid, next_comm); |
| 711 | |
| 712 | sched->cpu_last_switched[cpu] = timestamp; |
| 713 | |
| 714 | add_sched_event_run(sched, prev, timestamp, delta); |
| 715 | add_sched_event_sleep(sched, prev, timestamp, prev_state); |
| 716 | |
| 717 | return 0; |
| 718 | } |
| 719 | |
| 720 | static int replay_fork_event(struct perf_sched *sched, |
| 721 | union perf_event *event, |
| 722 | struct machine *machine) |
| 723 | { |
| 724 | struct thread *child, *parent; |
| 725 | |
| 726 | child = machine__findnew_thread(machine, event->fork.pid, |
| 727 | event->fork.tid); |
| 728 | parent = machine__findnew_thread(machine, event->fork.ppid, |
| 729 | event->fork.ptid); |
| 730 | |
| 731 | if (child == NULL || parent == NULL) { |
| 732 | pr_debug("thread does not exist on fork event: child %p, parent %p\n", |
| 733 | child, parent); |
| 734 | return 0; |
| 735 | } |
| 736 | |
| 737 | if (verbose) { |
| 738 | printf("fork event\n"); |
| 739 | printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid); |
| 740 | printf("... child: %s/%d\n", thread__comm_str(child), child->tid); |
| 741 | } |
| 742 | |
| 743 | register_pid(sched, parent->tid, thread__comm_str(parent)); |
| 744 | register_pid(sched, child->tid, thread__comm_str(child)); |
| 745 | return 0; |
| 746 | } |
| 747 | |
| 748 | struct sort_dimension { |
| 749 | const char *name; |
| 750 | sort_fn_t cmp; |
| 751 | struct list_head list; |
| 752 | }; |
| 753 | |
| 754 | static int |
| 755 | thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r) |
| 756 | { |
| 757 | struct sort_dimension *sort; |
| 758 | int ret = 0; |
| 759 | |
| 760 | BUG_ON(list_empty(list)); |
| 761 | |
| 762 | list_for_each_entry(sort, list, list) { |
| 763 | ret = sort->cmp(l, r); |
| 764 | if (ret) |
| 765 | return ret; |
| 766 | } |
| 767 | |
| 768 | return ret; |
| 769 | } |
| 770 | |
| 771 | static struct work_atoms * |
| 772 | thread_atoms_search(struct rb_root *root, struct thread *thread, |
| 773 | struct list_head *sort_list) |
| 774 | { |
| 775 | struct rb_node *node = root->rb_node; |
| 776 | struct work_atoms key = { .thread = thread }; |
| 777 | |
| 778 | while (node) { |
| 779 | struct work_atoms *atoms; |
| 780 | int cmp; |
| 781 | |
| 782 | atoms = container_of(node, struct work_atoms, node); |
| 783 | |
| 784 | cmp = thread_lat_cmp(sort_list, &key, atoms); |
| 785 | if (cmp > 0) |
| 786 | node = node->rb_left; |
| 787 | else if (cmp < 0) |
| 788 | node = node->rb_right; |
| 789 | else { |
| 790 | BUG_ON(thread != atoms->thread); |
| 791 | return atoms; |
| 792 | } |
| 793 | } |
| 794 | return NULL; |
| 795 | } |
| 796 | |
| 797 | static void |
| 798 | __thread_latency_insert(struct rb_root *root, struct work_atoms *data, |
| 799 | struct list_head *sort_list) |
| 800 | { |
| 801 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 802 | |
| 803 | while (*new) { |
| 804 | struct work_atoms *this; |
| 805 | int cmp; |
| 806 | |
| 807 | this = container_of(*new, struct work_atoms, node); |
| 808 | parent = *new; |
| 809 | |
| 810 | cmp = thread_lat_cmp(sort_list, data, this); |
| 811 | |
| 812 | if (cmp > 0) |
| 813 | new = &((*new)->rb_left); |
| 814 | else |
| 815 | new = &((*new)->rb_right); |
| 816 | } |
| 817 | |
| 818 | rb_link_node(&data->node, parent, new); |
| 819 | rb_insert_color(&data->node, root); |
| 820 | } |
| 821 | |
| 822 | static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread) |
| 823 | { |
| 824 | struct work_atoms *atoms = zalloc(sizeof(*atoms)); |
| 825 | if (!atoms) { |
| 826 | pr_err("No memory at %s\n", __func__); |
| 827 | return -1; |
| 828 | } |
| 829 | |
| 830 | atoms->thread = thread; |
| 831 | INIT_LIST_HEAD(&atoms->work_list); |
| 832 | __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid); |
| 833 | return 0; |
| 834 | } |
| 835 | |
| 836 | static char sched_out_state(u64 prev_state) |
| 837 | { |
| 838 | const char *str = TASK_STATE_TO_CHAR_STR; |
| 839 | |
| 840 | return str[prev_state]; |
| 841 | } |
| 842 | |
| 843 | static int |
| 844 | add_sched_out_event(struct work_atoms *atoms, |
| 845 | char run_state, |
| 846 | u64 timestamp) |
| 847 | { |
| 848 | struct work_atom *atom = zalloc(sizeof(*atom)); |
| 849 | if (!atom) { |
| 850 | pr_err("Non memory at %s", __func__); |
| 851 | return -1; |
| 852 | } |
| 853 | |
| 854 | atom->sched_out_time = timestamp; |
| 855 | |
| 856 | if (run_state == 'R') { |
| 857 | atom->state = THREAD_WAIT_CPU; |
| 858 | atom->wake_up_time = atom->sched_out_time; |
| 859 | } |
| 860 | |
| 861 | list_add_tail(&atom->list, &atoms->work_list); |
| 862 | return 0; |
| 863 | } |
| 864 | |
| 865 | static void |
| 866 | add_runtime_event(struct work_atoms *atoms, u64 delta, |
| 867 | u64 timestamp __maybe_unused) |
| 868 | { |
| 869 | struct work_atom *atom; |
| 870 | |
| 871 | BUG_ON(list_empty(&atoms->work_list)); |
| 872 | |
| 873 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); |
| 874 | |
| 875 | atom->runtime += delta; |
| 876 | atoms->total_runtime += delta; |
| 877 | } |
| 878 | |
| 879 | static void |
| 880 | add_sched_in_event(struct work_atoms *atoms, u64 timestamp) |
| 881 | { |
| 882 | struct work_atom *atom; |
| 883 | u64 delta; |
| 884 | |
| 885 | if (list_empty(&atoms->work_list)) |
| 886 | return; |
| 887 | |
| 888 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); |
| 889 | |
| 890 | if (atom->state != THREAD_WAIT_CPU) |
| 891 | return; |
| 892 | |
| 893 | if (timestamp < atom->wake_up_time) { |
| 894 | atom->state = THREAD_IGNORE; |
| 895 | return; |
| 896 | } |
| 897 | |
| 898 | atom->state = THREAD_SCHED_IN; |
| 899 | atom->sched_in_time = timestamp; |
| 900 | |
| 901 | delta = atom->sched_in_time - atom->wake_up_time; |
| 902 | atoms->total_lat += delta; |
| 903 | if (delta > atoms->max_lat) { |
| 904 | atoms->max_lat = delta; |
| 905 | atoms->max_lat_at = timestamp; |
| 906 | } |
| 907 | atoms->nb_atoms++; |
| 908 | } |
| 909 | |
| 910 | static int latency_switch_event(struct perf_sched *sched, |
| 911 | struct perf_evsel *evsel, |
| 912 | struct perf_sample *sample, |
| 913 | struct machine *machine) |
| 914 | { |
| 915 | const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), |
| 916 | next_pid = perf_evsel__intval(evsel, sample, "next_pid"); |
| 917 | const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state"); |
| 918 | struct work_atoms *out_events, *in_events; |
| 919 | struct thread *sched_out, *sched_in; |
| 920 | u64 timestamp0, timestamp = sample->time; |
| 921 | int cpu = sample->cpu; |
| 922 | s64 delta; |
| 923 | |
| 924 | BUG_ON(cpu >= MAX_CPUS || cpu < 0); |
| 925 | |
| 926 | timestamp0 = sched->cpu_last_switched[cpu]; |
| 927 | sched->cpu_last_switched[cpu] = timestamp; |
| 928 | if (timestamp0) |
| 929 | delta = timestamp - timestamp0; |
| 930 | else |
| 931 | delta = 0; |
| 932 | |
| 933 | if (delta < 0) { |
| 934 | pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); |
| 935 | return -1; |
| 936 | } |
| 937 | |
| 938 | sched_out = machine__findnew_thread(machine, 0, prev_pid); |
| 939 | sched_in = machine__findnew_thread(machine, 0, next_pid); |
| 940 | |
| 941 | out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid); |
| 942 | if (!out_events) { |
| 943 | if (thread_atoms_insert(sched, sched_out)) |
| 944 | return -1; |
| 945 | out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid); |
| 946 | if (!out_events) { |
| 947 | pr_err("out-event: Internal tree error"); |
| 948 | return -1; |
| 949 | } |
| 950 | } |
| 951 | if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp)) |
| 952 | return -1; |
| 953 | |
| 954 | in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid); |
| 955 | if (!in_events) { |
| 956 | if (thread_atoms_insert(sched, sched_in)) |
| 957 | return -1; |
| 958 | in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid); |
| 959 | if (!in_events) { |
| 960 | pr_err("in-event: Internal tree error"); |
| 961 | return -1; |
| 962 | } |
| 963 | /* |
| 964 | * Take came in we have not heard about yet, |
| 965 | * add in an initial atom in runnable state: |
| 966 | */ |
| 967 | if (add_sched_out_event(in_events, 'R', timestamp)) |
| 968 | return -1; |
| 969 | } |
| 970 | add_sched_in_event(in_events, timestamp); |
| 971 | |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | static int latency_runtime_event(struct perf_sched *sched, |
| 976 | struct perf_evsel *evsel, |
| 977 | struct perf_sample *sample, |
| 978 | struct machine *machine) |
| 979 | { |
| 980 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"); |
| 981 | const u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); |
| 982 | struct thread *thread = machine__findnew_thread(machine, 0, pid); |
| 983 | struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid); |
| 984 | u64 timestamp = sample->time; |
| 985 | int cpu = sample->cpu; |
| 986 | |
| 987 | BUG_ON(cpu >= MAX_CPUS || cpu < 0); |
| 988 | if (!atoms) { |
| 989 | if (thread_atoms_insert(sched, thread)) |
| 990 | return -1; |
| 991 | atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid); |
| 992 | if (!atoms) { |
| 993 | pr_err("in-event: Internal tree error"); |
| 994 | return -1; |
| 995 | } |
| 996 | if (add_sched_out_event(atoms, 'R', timestamp)) |
| 997 | return -1; |
| 998 | } |
| 999 | |
| 1000 | add_runtime_event(atoms, runtime, timestamp); |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | static int latency_wakeup_event(struct perf_sched *sched, |
| 1005 | struct perf_evsel *evsel, |
| 1006 | struct perf_sample *sample, |
| 1007 | struct machine *machine) |
| 1008 | { |
| 1009 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"); |
| 1010 | struct work_atoms *atoms; |
| 1011 | struct work_atom *atom; |
| 1012 | struct thread *wakee; |
| 1013 | u64 timestamp = sample->time; |
| 1014 | |
| 1015 | wakee = machine__findnew_thread(machine, 0, pid); |
| 1016 | atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid); |
| 1017 | if (!atoms) { |
| 1018 | if (thread_atoms_insert(sched, wakee)) |
| 1019 | return -1; |
| 1020 | atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid); |
| 1021 | if (!atoms) { |
| 1022 | pr_err("wakeup-event: Internal tree error"); |
| 1023 | return -1; |
| 1024 | } |
| 1025 | if (add_sched_out_event(atoms, 'S', timestamp)) |
| 1026 | return -1; |
| 1027 | } |
| 1028 | |
| 1029 | BUG_ON(list_empty(&atoms->work_list)); |
| 1030 | |
| 1031 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); |
| 1032 | |
| 1033 | /* |
| 1034 | * As we do not guarantee the wakeup event happens when |
| 1035 | * task is out of run queue, also may happen when task is |
| 1036 | * on run queue and wakeup only change ->state to TASK_RUNNING, |
| 1037 | * then we should not set the ->wake_up_time when wake up a |
| 1038 | * task which is on run queue. |
| 1039 | * |
| 1040 | * You WILL be missing events if you've recorded only |
| 1041 | * one CPU, or are only looking at only one, so don't |
| 1042 | * skip in this case. |
| 1043 | */ |
| 1044 | if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING) |
| 1045 | return 0; |
| 1046 | |
| 1047 | sched->nr_timestamps++; |
| 1048 | if (atom->sched_out_time > timestamp) { |
| 1049 | sched->nr_unordered_timestamps++; |
| 1050 | return 0; |
| 1051 | } |
| 1052 | |
| 1053 | atom->state = THREAD_WAIT_CPU; |
| 1054 | atom->wake_up_time = timestamp; |
| 1055 | return 0; |
| 1056 | } |
| 1057 | |
| 1058 | static int latency_migrate_task_event(struct perf_sched *sched, |
| 1059 | struct perf_evsel *evsel, |
| 1060 | struct perf_sample *sample, |
| 1061 | struct machine *machine) |
| 1062 | { |
| 1063 | const u32 pid = perf_evsel__intval(evsel, sample, "pid"); |
| 1064 | u64 timestamp = sample->time; |
| 1065 | struct work_atoms *atoms; |
| 1066 | struct work_atom *atom; |
| 1067 | struct thread *migrant; |
| 1068 | |
| 1069 | /* |
| 1070 | * Only need to worry about migration when profiling one CPU. |
| 1071 | */ |
| 1072 | if (sched->profile_cpu == -1) |
| 1073 | return 0; |
| 1074 | |
| 1075 | migrant = machine__findnew_thread(machine, 0, pid); |
| 1076 | atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid); |
| 1077 | if (!atoms) { |
| 1078 | if (thread_atoms_insert(sched, migrant)) |
| 1079 | return -1; |
| 1080 | register_pid(sched, migrant->tid, thread__comm_str(migrant)); |
| 1081 | atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid); |
| 1082 | if (!atoms) { |
| 1083 | pr_err("migration-event: Internal tree error"); |
| 1084 | return -1; |
| 1085 | } |
| 1086 | if (add_sched_out_event(atoms, 'R', timestamp)) |
| 1087 | return -1; |
| 1088 | } |
| 1089 | |
| 1090 | BUG_ON(list_empty(&atoms->work_list)); |
| 1091 | |
| 1092 | atom = list_entry(atoms->work_list.prev, struct work_atom, list); |
| 1093 | atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp; |
| 1094 | |
| 1095 | sched->nr_timestamps++; |
| 1096 | |
| 1097 | if (atom->sched_out_time > timestamp) |
| 1098 | sched->nr_unordered_timestamps++; |
| 1099 | |
| 1100 | return 0; |
| 1101 | } |
| 1102 | |
| 1103 | static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list) |
| 1104 | { |
| 1105 | int i; |
| 1106 | int ret; |
| 1107 | u64 avg; |
| 1108 | |
| 1109 | if (!work_list->nb_atoms) |
| 1110 | return; |
| 1111 | /* |
| 1112 | * Ignore idle threads: |
| 1113 | */ |
| 1114 | if (!strcmp(thread__comm_str(work_list->thread), "swapper")) |
| 1115 | return; |
| 1116 | |
| 1117 | sched->all_runtime += work_list->total_runtime; |
| 1118 | sched->all_count += work_list->nb_atoms; |
| 1119 | |
| 1120 | ret = printf(" %s:%d ", thread__comm_str(work_list->thread), work_list->thread->tid); |
| 1121 | |
| 1122 | for (i = 0; i < 24 - ret; i++) |
| 1123 | printf(" "); |
| 1124 | |
| 1125 | avg = work_list->total_lat / work_list->nb_atoms; |
| 1126 | |
| 1127 | printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13.6f s\n", |
| 1128 | (double)work_list->total_runtime / 1e6, |
| 1129 | work_list->nb_atoms, (double)avg / 1e6, |
| 1130 | (double)work_list->max_lat / 1e6, |
| 1131 | (double)work_list->max_lat_at / 1e9); |
| 1132 | } |
| 1133 | |
| 1134 | static int pid_cmp(struct work_atoms *l, struct work_atoms *r) |
| 1135 | { |
| 1136 | if (l->thread->tid < r->thread->tid) |
| 1137 | return -1; |
| 1138 | if (l->thread->tid > r->thread->tid) |
| 1139 | return 1; |
| 1140 | |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | static int avg_cmp(struct work_atoms *l, struct work_atoms *r) |
| 1145 | { |
| 1146 | u64 avgl, avgr; |
| 1147 | |
| 1148 | if (!l->nb_atoms) |
| 1149 | return -1; |
| 1150 | |
| 1151 | if (!r->nb_atoms) |
| 1152 | return 1; |
| 1153 | |
| 1154 | avgl = l->total_lat / l->nb_atoms; |
| 1155 | avgr = r->total_lat / r->nb_atoms; |
| 1156 | |
| 1157 | if (avgl < avgr) |
| 1158 | return -1; |
| 1159 | if (avgl > avgr) |
| 1160 | return 1; |
| 1161 | |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | static int max_cmp(struct work_atoms *l, struct work_atoms *r) |
| 1166 | { |
| 1167 | if (l->max_lat < r->max_lat) |
| 1168 | return -1; |
| 1169 | if (l->max_lat > r->max_lat) |
| 1170 | return 1; |
| 1171 | |
| 1172 | return 0; |
| 1173 | } |
| 1174 | |
| 1175 | static int switch_cmp(struct work_atoms *l, struct work_atoms *r) |
| 1176 | { |
| 1177 | if (l->nb_atoms < r->nb_atoms) |
| 1178 | return -1; |
| 1179 | if (l->nb_atoms > r->nb_atoms) |
| 1180 | return 1; |
| 1181 | |
| 1182 | return 0; |
| 1183 | } |
| 1184 | |
| 1185 | static int runtime_cmp(struct work_atoms *l, struct work_atoms *r) |
| 1186 | { |
| 1187 | if (l->total_runtime < r->total_runtime) |
| 1188 | return -1; |
| 1189 | if (l->total_runtime > r->total_runtime) |
| 1190 | return 1; |
| 1191 | |
| 1192 | return 0; |
| 1193 | } |
| 1194 | |
| 1195 | static int sort_dimension__add(const char *tok, struct list_head *list) |
| 1196 | { |
| 1197 | size_t i; |
| 1198 | static struct sort_dimension avg_sort_dimension = { |
| 1199 | .name = "avg", |
| 1200 | .cmp = avg_cmp, |
| 1201 | }; |
| 1202 | static struct sort_dimension max_sort_dimension = { |
| 1203 | .name = "max", |
| 1204 | .cmp = max_cmp, |
| 1205 | }; |
| 1206 | static struct sort_dimension pid_sort_dimension = { |
| 1207 | .name = "pid", |
| 1208 | .cmp = pid_cmp, |
| 1209 | }; |
| 1210 | static struct sort_dimension runtime_sort_dimension = { |
| 1211 | .name = "runtime", |
| 1212 | .cmp = runtime_cmp, |
| 1213 | }; |
| 1214 | static struct sort_dimension switch_sort_dimension = { |
| 1215 | .name = "switch", |
| 1216 | .cmp = switch_cmp, |
| 1217 | }; |
| 1218 | struct sort_dimension *available_sorts[] = { |
| 1219 | &pid_sort_dimension, |
| 1220 | &avg_sort_dimension, |
| 1221 | &max_sort_dimension, |
| 1222 | &switch_sort_dimension, |
| 1223 | &runtime_sort_dimension, |
| 1224 | }; |
| 1225 | |
| 1226 | for (i = 0; i < ARRAY_SIZE(available_sorts); i++) { |
| 1227 | if (!strcmp(available_sorts[i]->name, tok)) { |
| 1228 | list_add_tail(&available_sorts[i]->list, list); |
| 1229 | |
| 1230 | return 0; |
| 1231 | } |
| 1232 | } |
| 1233 | |
| 1234 | return -1; |
| 1235 | } |
| 1236 | |
| 1237 | static void perf_sched__sort_lat(struct perf_sched *sched) |
| 1238 | { |
| 1239 | struct rb_node *node; |
| 1240 | |
| 1241 | for (;;) { |
| 1242 | struct work_atoms *data; |
| 1243 | node = rb_first(&sched->atom_root); |
| 1244 | if (!node) |
| 1245 | break; |
| 1246 | |
| 1247 | rb_erase(node, &sched->atom_root); |
| 1248 | data = rb_entry(node, struct work_atoms, node); |
| 1249 | __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list); |
| 1250 | } |
| 1251 | } |
| 1252 | |
| 1253 | static int process_sched_wakeup_event(struct perf_tool *tool, |
| 1254 | struct perf_evsel *evsel, |
| 1255 | struct perf_sample *sample, |
| 1256 | struct machine *machine) |
| 1257 | { |
| 1258 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
| 1259 | |
| 1260 | if (sched->tp_handler->wakeup_event) |
| 1261 | return sched->tp_handler->wakeup_event(sched, evsel, sample, machine); |
| 1262 | |
| 1263 | return 0; |
| 1264 | } |
| 1265 | |
| 1266 | static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel, |
| 1267 | struct perf_sample *sample, struct machine *machine) |
| 1268 | { |
| 1269 | const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid"); |
| 1270 | struct thread *sched_in; |
| 1271 | int new_shortname; |
| 1272 | u64 timestamp0, timestamp = sample->time; |
| 1273 | s64 delta; |
| 1274 | int cpu, this_cpu = sample->cpu; |
| 1275 | |
| 1276 | BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0); |
| 1277 | |
| 1278 | if (this_cpu > sched->max_cpu) |
| 1279 | sched->max_cpu = this_cpu; |
| 1280 | |
| 1281 | timestamp0 = sched->cpu_last_switched[this_cpu]; |
| 1282 | sched->cpu_last_switched[this_cpu] = timestamp; |
| 1283 | if (timestamp0) |
| 1284 | delta = timestamp - timestamp0; |
| 1285 | else |
| 1286 | delta = 0; |
| 1287 | |
| 1288 | if (delta < 0) { |
| 1289 | pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); |
| 1290 | return -1; |
| 1291 | } |
| 1292 | |
| 1293 | sched_in = machine__findnew_thread(machine, 0, next_pid); |
| 1294 | |
| 1295 | sched->curr_thread[this_cpu] = sched_in; |
| 1296 | |
| 1297 | printf(" "); |
| 1298 | |
| 1299 | new_shortname = 0; |
| 1300 | if (!sched_in->shortname[0]) { |
| 1301 | if (!strcmp(thread__comm_str(sched_in), "swapper")) { |
| 1302 | /* |
| 1303 | * Don't allocate a letter-number for swapper:0 |
| 1304 | * as a shortname. Instead, we use '.' for it. |
| 1305 | */ |
| 1306 | sched_in->shortname[0] = '.'; |
| 1307 | sched_in->shortname[1] = ' '; |
| 1308 | } else { |
| 1309 | sched_in->shortname[0] = sched->next_shortname1; |
| 1310 | sched_in->shortname[1] = sched->next_shortname2; |
| 1311 | |
| 1312 | if (sched->next_shortname1 < 'Z') { |
| 1313 | sched->next_shortname1++; |
| 1314 | } else { |
| 1315 | sched->next_shortname1 = 'A'; |
| 1316 | if (sched->next_shortname2 < '9') |
| 1317 | sched->next_shortname2++; |
| 1318 | else |
| 1319 | sched->next_shortname2 = '0'; |
| 1320 | } |
| 1321 | } |
| 1322 | new_shortname = 1; |
| 1323 | } |
| 1324 | |
| 1325 | for (cpu = 0; cpu <= sched->max_cpu; cpu++) { |
| 1326 | if (cpu != this_cpu) |
| 1327 | printf(" "); |
| 1328 | else |
| 1329 | printf("*"); |
| 1330 | |
| 1331 | if (sched->curr_thread[cpu]) |
| 1332 | printf("%2s ", sched->curr_thread[cpu]->shortname); |
| 1333 | else |
| 1334 | printf(" "); |
| 1335 | } |
| 1336 | |
| 1337 | printf(" %12.6f secs ", (double)timestamp/1e9); |
| 1338 | if (new_shortname) { |
| 1339 | printf("%s => %s:%d\n", |
| 1340 | sched_in->shortname, thread__comm_str(sched_in), sched_in->tid); |
| 1341 | } else { |
| 1342 | printf("\n"); |
| 1343 | } |
| 1344 | |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
| 1348 | static int process_sched_switch_event(struct perf_tool *tool, |
| 1349 | struct perf_evsel *evsel, |
| 1350 | struct perf_sample *sample, |
| 1351 | struct machine *machine) |
| 1352 | { |
| 1353 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
| 1354 | int this_cpu = sample->cpu, err = 0; |
| 1355 | u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), |
| 1356 | next_pid = perf_evsel__intval(evsel, sample, "next_pid"); |
| 1357 | |
| 1358 | if (sched->curr_pid[this_cpu] != (u32)-1) { |
| 1359 | /* |
| 1360 | * Are we trying to switch away a PID that is |
| 1361 | * not current? |
| 1362 | */ |
| 1363 | if (sched->curr_pid[this_cpu] != prev_pid) |
| 1364 | sched->nr_context_switch_bugs++; |
| 1365 | } |
| 1366 | |
| 1367 | if (sched->tp_handler->switch_event) |
| 1368 | err = sched->tp_handler->switch_event(sched, evsel, sample, machine); |
| 1369 | |
| 1370 | sched->curr_pid[this_cpu] = next_pid; |
| 1371 | return err; |
| 1372 | } |
| 1373 | |
| 1374 | static int process_sched_runtime_event(struct perf_tool *tool, |
| 1375 | struct perf_evsel *evsel, |
| 1376 | struct perf_sample *sample, |
| 1377 | struct machine *machine) |
| 1378 | { |
| 1379 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
| 1380 | |
| 1381 | if (sched->tp_handler->runtime_event) |
| 1382 | return sched->tp_handler->runtime_event(sched, evsel, sample, machine); |
| 1383 | |
| 1384 | return 0; |
| 1385 | } |
| 1386 | |
| 1387 | static int perf_sched__process_fork_event(struct perf_tool *tool, |
| 1388 | union perf_event *event, |
| 1389 | struct perf_sample *sample, |
| 1390 | struct machine *machine) |
| 1391 | { |
| 1392 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
| 1393 | |
| 1394 | /* run the fork event through the perf machineruy */ |
| 1395 | perf_event__process_fork(tool, event, sample, machine); |
| 1396 | |
| 1397 | /* and then run additional processing needed for this command */ |
| 1398 | if (sched->tp_handler->fork_event) |
| 1399 | return sched->tp_handler->fork_event(sched, event, machine); |
| 1400 | |
| 1401 | return 0; |
| 1402 | } |
| 1403 | |
| 1404 | static int process_sched_migrate_task_event(struct perf_tool *tool, |
| 1405 | struct perf_evsel *evsel, |
| 1406 | struct perf_sample *sample, |
| 1407 | struct machine *machine) |
| 1408 | { |
| 1409 | struct perf_sched *sched = container_of(tool, struct perf_sched, tool); |
| 1410 | |
| 1411 | if (sched->tp_handler->migrate_task_event) |
| 1412 | return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine); |
| 1413 | |
| 1414 | return 0; |
| 1415 | } |
| 1416 | |
| 1417 | typedef int (*tracepoint_handler)(struct perf_tool *tool, |
| 1418 | struct perf_evsel *evsel, |
| 1419 | struct perf_sample *sample, |
| 1420 | struct machine *machine); |
| 1421 | |
| 1422 | static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused, |
| 1423 | union perf_event *event __maybe_unused, |
| 1424 | struct perf_sample *sample, |
| 1425 | struct perf_evsel *evsel, |
| 1426 | struct machine *machine) |
| 1427 | { |
| 1428 | int err = 0; |
| 1429 | |
| 1430 | evsel->hists.stats.total_period += sample->period; |
| 1431 | hists__inc_nr_samples(&evsel->hists, true); |
| 1432 | |
| 1433 | if (evsel->handler != NULL) { |
| 1434 | tracepoint_handler f = evsel->handler; |
| 1435 | err = f(tool, evsel, sample, machine); |
| 1436 | } |
| 1437 | |
| 1438 | return err; |
| 1439 | } |
| 1440 | |
| 1441 | static int perf_sched__read_events(struct perf_sched *sched, |
| 1442 | struct perf_session **psession) |
| 1443 | { |
| 1444 | const struct perf_evsel_str_handler handlers[] = { |
| 1445 | { "sched:sched_switch", process_sched_switch_event, }, |
| 1446 | { "sched:sched_stat_runtime", process_sched_runtime_event, }, |
| 1447 | { "sched:sched_wakeup", process_sched_wakeup_event, }, |
| 1448 | { "sched:sched_wakeup_new", process_sched_wakeup_event, }, |
| 1449 | { "sched:sched_migrate_task", process_sched_migrate_task_event, }, |
| 1450 | }; |
| 1451 | struct perf_session *session; |
| 1452 | struct perf_data_file file = { |
| 1453 | .path = input_name, |
| 1454 | .mode = PERF_DATA_MODE_READ, |
| 1455 | }; |
| 1456 | |
| 1457 | session = perf_session__new(&file, false, &sched->tool); |
| 1458 | if (session == NULL) { |
| 1459 | pr_debug("No Memory for session\n"); |
| 1460 | return -1; |
| 1461 | } |
| 1462 | |
| 1463 | if (perf_session__set_tracepoints_handlers(session, handlers)) |
| 1464 | goto out_delete; |
| 1465 | |
| 1466 | if (perf_session__has_traces(session, "record -R")) { |
| 1467 | int err = perf_session__process_events(session, &sched->tool); |
| 1468 | if (err) { |
| 1469 | pr_err("Failed to process events, error %d", err); |
| 1470 | goto out_delete; |
| 1471 | } |
| 1472 | |
| 1473 | sched->nr_events = session->stats.nr_events[0]; |
| 1474 | sched->nr_lost_events = session->stats.total_lost; |
| 1475 | sched->nr_lost_chunks = session->stats.nr_events[PERF_RECORD_LOST]; |
| 1476 | } |
| 1477 | |
| 1478 | if (psession) |
| 1479 | *psession = session; |
| 1480 | else |
| 1481 | perf_session__delete(session); |
| 1482 | |
| 1483 | return 0; |
| 1484 | |
| 1485 | out_delete: |
| 1486 | perf_session__delete(session); |
| 1487 | return -1; |
| 1488 | } |
| 1489 | |
| 1490 | static void print_bad_events(struct perf_sched *sched) |
| 1491 | { |
| 1492 | if (sched->nr_unordered_timestamps && sched->nr_timestamps) { |
| 1493 | printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n", |
| 1494 | (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0, |
| 1495 | sched->nr_unordered_timestamps, sched->nr_timestamps); |
| 1496 | } |
| 1497 | if (sched->nr_lost_events && sched->nr_events) { |
| 1498 | printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n", |
| 1499 | (double)sched->nr_lost_events/(double)sched->nr_events * 100.0, |
| 1500 | sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks); |
| 1501 | } |
| 1502 | if (sched->nr_context_switch_bugs && sched->nr_timestamps) { |
| 1503 | printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)", |
| 1504 | (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0, |
| 1505 | sched->nr_context_switch_bugs, sched->nr_timestamps); |
| 1506 | if (sched->nr_lost_events) |
| 1507 | printf(" (due to lost events?)"); |
| 1508 | printf("\n"); |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | static int perf_sched__lat(struct perf_sched *sched) |
| 1513 | { |
| 1514 | struct rb_node *next; |
| 1515 | struct perf_session *session; |
| 1516 | |
| 1517 | setup_pager(); |
| 1518 | |
| 1519 | /* save session -- references to threads are held in work_list */ |
| 1520 | if (perf_sched__read_events(sched, &session)) |
| 1521 | return -1; |
| 1522 | |
| 1523 | perf_sched__sort_lat(sched); |
| 1524 | |
| 1525 | printf("\n -----------------------------------------------------------------------------------------------------------------\n"); |
| 1526 | printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n"); |
| 1527 | printf(" -----------------------------------------------------------------------------------------------------------------\n"); |
| 1528 | |
| 1529 | next = rb_first(&sched->sorted_atom_root); |
| 1530 | |
| 1531 | while (next) { |
| 1532 | struct work_atoms *work_list; |
| 1533 | |
| 1534 | work_list = rb_entry(next, struct work_atoms, node); |
| 1535 | output_lat_thread(sched, work_list); |
| 1536 | next = rb_next(next); |
| 1537 | } |
| 1538 | |
| 1539 | printf(" -----------------------------------------------------------------------------------------------------------------\n"); |
| 1540 | printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n", |
| 1541 | (double)sched->all_runtime / 1e6, sched->all_count); |
| 1542 | |
| 1543 | printf(" ---------------------------------------------------\n"); |
| 1544 | |
| 1545 | print_bad_events(sched); |
| 1546 | printf("\n"); |
| 1547 | |
| 1548 | perf_session__delete(session); |
| 1549 | return 0; |
| 1550 | } |
| 1551 | |
| 1552 | static int perf_sched__map(struct perf_sched *sched) |
| 1553 | { |
| 1554 | sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF); |
| 1555 | |
| 1556 | setup_pager(); |
| 1557 | if (perf_sched__read_events(sched, NULL)) |
| 1558 | return -1; |
| 1559 | print_bad_events(sched); |
| 1560 | return 0; |
| 1561 | } |
| 1562 | |
| 1563 | static int perf_sched__replay(struct perf_sched *sched) |
| 1564 | { |
| 1565 | unsigned long i; |
| 1566 | |
| 1567 | calibrate_run_measurement_overhead(sched); |
| 1568 | calibrate_sleep_measurement_overhead(sched); |
| 1569 | |
| 1570 | test_calibrations(sched); |
| 1571 | |
| 1572 | if (perf_sched__read_events(sched, NULL)) |
| 1573 | return -1; |
| 1574 | |
| 1575 | printf("nr_run_events: %ld\n", sched->nr_run_events); |
| 1576 | printf("nr_sleep_events: %ld\n", sched->nr_sleep_events); |
| 1577 | printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events); |
| 1578 | |
| 1579 | if (sched->targetless_wakeups) |
| 1580 | printf("target-less wakeups: %ld\n", sched->targetless_wakeups); |
| 1581 | if (sched->multitarget_wakeups) |
| 1582 | printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups); |
| 1583 | if (sched->nr_run_events_optimized) |
| 1584 | printf("run atoms optimized: %ld\n", |
| 1585 | sched->nr_run_events_optimized); |
| 1586 | |
| 1587 | print_task_traces(sched); |
| 1588 | add_cross_task_wakeups(sched); |
| 1589 | |
| 1590 | create_tasks(sched); |
| 1591 | printf("------------------------------------------------------------\n"); |
| 1592 | for (i = 0; i < sched->replay_repeat; i++) |
| 1593 | run_one_test(sched); |
| 1594 | |
| 1595 | return 0; |
| 1596 | } |
| 1597 | |
| 1598 | static void setup_sorting(struct perf_sched *sched, const struct option *options, |
| 1599 | const char * const usage_msg[]) |
| 1600 | { |
| 1601 | char *tmp, *tok, *str = strdup(sched->sort_order); |
| 1602 | |
| 1603 | for (tok = strtok_r(str, ", ", &tmp); |
| 1604 | tok; tok = strtok_r(NULL, ", ", &tmp)) { |
| 1605 | if (sort_dimension__add(tok, &sched->sort_list) < 0) { |
| 1606 | error("Unknown --sort key: `%s'", tok); |
| 1607 | usage_with_options(usage_msg, options); |
| 1608 | } |
| 1609 | } |
| 1610 | |
| 1611 | free(str); |
| 1612 | |
| 1613 | sort_dimension__add("pid", &sched->cmp_pid); |
| 1614 | } |
| 1615 | |
| 1616 | static int __cmd_record(int argc, const char **argv) |
| 1617 | { |
| 1618 | unsigned int rec_argc, i, j; |
| 1619 | const char **rec_argv; |
| 1620 | const char * const record_args[] = { |
| 1621 | "record", |
| 1622 | "-a", |
| 1623 | "-R", |
| 1624 | "-m", "1024", |
| 1625 | "-c", "1", |
| 1626 | "-e", "sched:sched_switch", |
| 1627 | "-e", "sched:sched_stat_wait", |
| 1628 | "-e", "sched:sched_stat_sleep", |
| 1629 | "-e", "sched:sched_stat_iowait", |
| 1630 | "-e", "sched:sched_stat_runtime", |
| 1631 | "-e", "sched:sched_process_fork", |
| 1632 | "-e", "sched:sched_wakeup", |
| 1633 | "-e", "sched:sched_wakeup_new", |
| 1634 | "-e", "sched:sched_migrate_task", |
| 1635 | }; |
| 1636 | |
| 1637 | rec_argc = ARRAY_SIZE(record_args) + argc - 1; |
| 1638 | rec_argv = calloc(rec_argc + 1, sizeof(char *)); |
| 1639 | |
| 1640 | if (rec_argv == NULL) |
| 1641 | return -ENOMEM; |
| 1642 | |
| 1643 | for (i = 0; i < ARRAY_SIZE(record_args); i++) |
| 1644 | rec_argv[i] = strdup(record_args[i]); |
| 1645 | |
| 1646 | for (j = 1; j < (unsigned int)argc; j++, i++) |
| 1647 | rec_argv[i] = argv[j]; |
| 1648 | |
| 1649 | BUG_ON(i != rec_argc); |
| 1650 | |
| 1651 | return cmd_record(i, rec_argv, NULL); |
| 1652 | } |
| 1653 | |
| 1654 | int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused) |
| 1655 | { |
| 1656 | const char default_sort_order[] = "avg, max, switch, runtime"; |
| 1657 | struct perf_sched sched = { |
| 1658 | .tool = { |
| 1659 | .sample = perf_sched__process_tracepoint_sample, |
| 1660 | .comm = perf_event__process_comm, |
| 1661 | .lost = perf_event__process_lost, |
| 1662 | .fork = perf_sched__process_fork_event, |
| 1663 | .ordered_samples = true, |
| 1664 | }, |
| 1665 | .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid), |
| 1666 | .sort_list = LIST_HEAD_INIT(sched.sort_list), |
| 1667 | .start_work_mutex = PTHREAD_MUTEX_INITIALIZER, |
| 1668 | .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER, |
| 1669 | .sort_order = default_sort_order, |
| 1670 | .replay_repeat = 10, |
| 1671 | .profile_cpu = -1, |
| 1672 | .next_shortname1 = 'A', |
| 1673 | .next_shortname2 = '0', |
| 1674 | }; |
| 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[] = { |
| 1696 | OPT_STRING('i', "input", &input_name, "file", |
| 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_subcommands[] = { "record", "latency", "map", |
| 1713 | "replay", "script", NULL }; |
| 1714 | const char *sched_usage[] = { |
| 1715 | NULL, |
| 1716 | NULL |
| 1717 | }; |
| 1718 | struct trace_sched_handler lat_ops = { |
| 1719 | .wakeup_event = latency_wakeup_event, |
| 1720 | .switch_event = latency_switch_event, |
| 1721 | .runtime_event = latency_runtime_event, |
| 1722 | .migrate_task_event = latency_migrate_task_event, |
| 1723 | }; |
| 1724 | struct trace_sched_handler map_ops = { |
| 1725 | .switch_event = map_switch_event, |
| 1726 | }; |
| 1727 | struct trace_sched_handler replay_ops = { |
| 1728 | .wakeup_event = replay_wakeup_event, |
| 1729 | .switch_event = replay_switch_event, |
| 1730 | .fork_event = replay_fork_event, |
| 1731 | }; |
| 1732 | unsigned int i; |
| 1733 | |
| 1734 | for (i = 0; i < ARRAY_SIZE(sched.curr_pid); i++) |
| 1735 | sched.curr_pid[i] = -1; |
| 1736 | |
| 1737 | argc = parse_options_subcommand(argc, argv, sched_options, sched_subcommands, |
| 1738 | sched_usage, PARSE_OPT_STOP_AT_NON_OPTION); |
| 1739 | if (!argc) |
| 1740 | usage_with_options(sched_usage, sched_options); |
| 1741 | |
| 1742 | /* |
| 1743 | * Aliased to 'perf script' for now: |
| 1744 | */ |
| 1745 | if (!strcmp(argv[0], "script")) |
| 1746 | return cmd_script(argc, argv, prefix); |
| 1747 | |
| 1748 | symbol__init(); |
| 1749 | if (!strncmp(argv[0], "rec", 3)) { |
| 1750 | return __cmd_record(argc, argv); |
| 1751 | } else if (!strncmp(argv[0], "lat", 3)) { |
| 1752 | sched.tp_handler = &lat_ops; |
| 1753 | if (argc > 1) { |
| 1754 | argc = parse_options(argc, argv, latency_options, latency_usage, 0); |
| 1755 | if (argc) |
| 1756 | usage_with_options(latency_usage, latency_options); |
| 1757 | } |
| 1758 | setup_sorting(&sched, latency_options, latency_usage); |
| 1759 | return perf_sched__lat(&sched); |
| 1760 | } else if (!strcmp(argv[0], "map")) { |
| 1761 | sched.tp_handler = &map_ops; |
| 1762 | setup_sorting(&sched, latency_options, latency_usage); |
| 1763 | return perf_sched__map(&sched); |
| 1764 | } else if (!strncmp(argv[0], "rep", 3)) { |
| 1765 | sched.tp_handler = &replay_ops; |
| 1766 | if (argc) { |
| 1767 | argc = parse_options(argc, argv, replay_options, replay_usage, 0); |
| 1768 | if (argc) |
| 1769 | usage_with_options(replay_usage, replay_options); |
| 1770 | } |
| 1771 | return perf_sched__replay(&sched); |
| 1772 | } else { |
| 1773 | usage_with_options(sched_usage, sched_options); |
| 1774 | } |
| 1775 | |
| 1776 | return 0; |
| 1777 | } |