SAFE public projects git trees. - safe/jmp/linux-2.6/blob - tools/perf/builtin-sched.c

   1 #include "builtin.h"
   2 #include "perf.h"
   3
   4 #include "util/util.h"
   5 #include "util/cache.h"
   6 #include "util/symbol.h"
   7 #include "util/thread.h"
   8 #include "util/header.h"
   9
  10 #include "util/parse-options.h"
  11 #include "util/trace-event.h"
  12
  13 #include "util/debug.h"
  14 #include "util/data_map.h"
  15
  16 #include <sys/types.h>
  17 #include <sys/prctl.h>
  18
  19 #include <semaphore.h>
  20 #include <pthread.h>
  21 #include <math.h>
  22
  23 static char                     const *input_name = "perf.data";
  24
  25 static struct perf_header       *header;
  26 static u64                      sample_type;
  27
  28 static char                     default_sort_order[] = "avg, max, switch, runtime";
  29 static char                     *sort_order = default_sort_order;
  30
  31 static int                      profile_cpu = -1;
  32
  33 #define PR_SET_NAME             15               /* Set process name */
  34 #define MAX_CPUS                4096
  35
  36 static u64                      run_measurement_overhead;
  37 static u64                      sleep_measurement_overhead;
  38
  39 #define COMM_LEN                20
  40 #define SYM_LEN                 129
  41
  42 #define MAX_PID                 65536
  43
  44 static unsigned long            nr_tasks;
  45
  46 struct sched_atom;
  47
  48 struct task_desc {
  49         unsigned long           nr;
  50         unsigned long           pid;
  51         char                    comm[COMM_LEN];
  52
  53         unsigned long           nr_events;
  54         unsigned long           curr_event;
  55         struct sched_atom       **atoms;
  56
  57         pthread_t               thread;
  58         sem_t                   sleep_sem;
  59
  60         sem_t                   ready_for_work;
  61         sem_t                   work_done_sem;
  62
  63         u64                     cpu_usage;
  64 };
  65
  66 enum sched_event_type {
  67         SCHED_EVENT_RUN,
  68         SCHED_EVENT_SLEEP,
  69         SCHED_EVENT_WAKEUP,
  70         SCHED_EVENT_MIGRATION,
  71 };
  72
  73 struct sched_atom {
  74         enum sched_event_type   type;
  75         u64                     timestamp;
  76         u64                     duration;
  77         unsigned long           nr;
  78         int                     specific_wait;
  79         sem_t                   *wait_sem;
  80         struct task_desc        *wakee;
  81 };
  82
  83 static struct task_desc         *pid_to_task[MAX_PID];
  84
  85 static struct task_desc         **tasks;
  86
  87 static pthread_mutex_t          start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
  88 static u64                      start_time;
  89
  90 static pthread_mutex_t          work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
  91
  92 static unsigned long            nr_run_events;
  93 static unsigned long            nr_sleep_events;
  94 static unsigned long            nr_wakeup_events;
  95
  96 static unsigned long            nr_sleep_corrections;
  97 static unsigned long            nr_run_events_optimized;
  98
  99 static unsigned long            targetless_wakeups;
 100 static unsigned long            multitarget_wakeups;
 101
 102 static u64                      cpu_usage;
 103 static u64                      runavg_cpu_usage;
 104 static u64                      parent_cpu_usage;
 105 static u64                      runavg_parent_cpu_usage;
 106
 107 static unsigned long            nr_runs;
 108 static u64                      sum_runtime;
 109 static u64                      sum_fluct;
 110 static u64                      run_avg;
 111
 112 static unsigned long            replay_repeat = 10;
 113 static unsigned long            nr_timestamps;
 114 static unsigned long            nr_unordered_timestamps;
 115 static unsigned long            nr_state_machine_bugs;
 116 static unsigned long            nr_context_switch_bugs;
 117 static unsigned long            nr_events;
 118 static unsigned long            nr_lost_chunks;
 119 static unsigned long            nr_lost_events;
 120
 121 #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
 122
 123 enum thread_state {
 124         THREAD_SLEEPING = 0,
 125         THREAD_WAIT_CPU,
 126         THREAD_SCHED_IN,
 127         THREAD_IGNORE
 128 };
 129
 130 struct work_atom {
 131         struct list_head        list;
 132         enum thread_state       state;
 133         u64                     sched_out_time;
 134         u64                     wake_up_time;
 135         u64                     sched_in_time;
 136         u64                     runtime;
 137 };
 138
 139 struct work_atoms {
 140         struct list_head        work_list;
 141         struct thread           *thread;
 142         struct rb_node          node;
 143         u64                     max_lat;
 144         u64                     total_lat;
 145         u64                     nb_atoms;
 146         u64                     total_runtime;
 147 };
 148
 149 typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
 150
 151 static struct rb_root           atom_root, sorted_atom_root;
 152
 153 static u64                      all_runtime;
 154 static u64                      all_count;
 155
 156
 157 static u64 get_nsecs(void)
 158 {
 159         struct timespec ts;
 160
 161         clock_gettime(CLOCK_MONOTONIC, &ts);
 162
 163         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
 164 }
 165
 166 static void burn_nsecs(u64 nsecs)
 167 {
 168         u64 T0 = get_nsecs(), T1;
 169
 170         do {
 171                 T1 = get_nsecs();
 172         } while (T1 + run_measurement_overhead < T0 + nsecs);
 173 }
 174
 175 static void sleep_nsecs(u64 nsecs)
 176 {
 177         struct timespec ts;
 178
 179         ts.tv_nsec = nsecs % 999999999;
 180         ts.tv_sec = nsecs / 999999999;
 181
 182         nanosleep(&ts, NULL);
 183 }
 184
 185 static void calibrate_run_measurement_overhead(void)
 186 {
 187         u64 T0, T1, delta, min_delta = 1000000000ULL;
 188         int i;
 189
 190         for (i = 0; i < 10; i++) {
 191                 T0 = get_nsecs();
 192                 burn_nsecs(0);
 193                 T1 = get_nsecs();
 194                 delta = T1-T0;
 195                 min_delta = min(min_delta, delta);
 196         }
 197         run_measurement_overhead = min_delta;
 198
 199         printf("run measurement overhead: %Ld nsecs\n", min_delta);
 200 }
 201
 202 static void calibrate_sleep_measurement_overhead(void)
 203 {
 204         u64 T0, T1, delta, min_delta = 1000000000ULL;
 205         int i;
 206
 207         for (i = 0; i < 10; i++) {
 208                 T0 = get_nsecs();
 209                 sleep_nsecs(10000);
 210                 T1 = get_nsecs();
 211                 delta = T1-T0;
 212                 min_delta = min(min_delta, delta);
 213         }
 214         min_delta -= 10000;
 215         sleep_measurement_overhead = min_delta;
 216
 217         printf("sleep measurement overhead: %Ld nsecs\n", min_delta);
 218 }
 219
 220 static struct sched_atom *
 221 get_new_event(struct task_desc *task, u64 timestamp)
 222 {
 223         struct sched_atom *event = zalloc(sizeof(*event));
 224         unsigned long idx = task->nr_events;
 225         size_t size;
 226
 227         event->timestamp = timestamp;
 228         event->nr = idx;
 229
 230         task->nr_events++;
 231         size = sizeof(struct sched_atom *) * task->nr_events;
 232         task->atoms = realloc(task->atoms, size);
 233         BUG_ON(!task->atoms);
 234
 235         task->atoms[idx] = event;
 236
 237         return event;
 238 }
 239
 240 static struct sched_atom *last_event(struct task_desc *task)
 241 {
 242         if (!task->nr_events)
 243                 return NULL;
 244
 245         return task->atoms[task->nr_events - 1];
 246 }
 247
 248 static void
 249 add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
 250 {
 251         struct sched_atom *event, *curr_event = last_event(task);
 252
 253         /*
 254          * optimize an existing RUN event by merging this one
 255          * to it:
 256          */
 257         if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
 258                 nr_run_events_optimized++;
 259                 curr_event->duration += duration;
 260                 return;
 261         }
 262
 263         event = get_new_event(task, timestamp);
 264
 265         event->type = SCHED_EVENT_RUN;
 266         event->duration = duration;
 267
 268         nr_run_events++;
 269 }
 270
 271 static void
 272 add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
 273                        struct task_desc *wakee)
 274 {
 275         struct sched_atom *event, *wakee_event;
 276
 277         event = get_new_event(task, timestamp);
 278         event->type = SCHED_EVENT_WAKEUP;
 279         event->wakee = wakee;
 280
 281         wakee_event = last_event(wakee);
 282         if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
 283                 targetless_wakeups++;
 284                 return;
 285         }
 286         if (wakee_event->wait_sem) {
 287                 multitarget_wakeups++;
 288                 return;
 289         }
 290
 291         wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
 292         sem_init(wakee_event->wait_sem, 0, 0);
 293         wakee_event->specific_wait = 1;
 294         event->wait_sem = wakee_event->wait_sem;
 295
 296         nr_wakeup_events++;
 297 }
 298
 299 static void
 300 add_sched_event_sleep(struct task_desc *task, u64 timestamp,
 301                       u64 task_state __used)
 302 {
 303         struct sched_atom *event = get_new_event(task, timestamp);
 304
 305         event->type = SCHED_EVENT_SLEEP;
 306
 307         nr_sleep_events++;
 308 }
 309
 310 static struct task_desc *register_pid(unsigned long pid, const char *comm)
 311 {
 312         struct task_desc *task;
 313
 314         BUG_ON(pid >= MAX_PID);
 315
 316         task = pid_to_task[pid];
 317
 318         if (task)
 319                 return task;
 320
 321         task = zalloc(sizeof(*task));
 322         task->pid = pid;
 323         task->nr = nr_tasks;
 324         strcpy(task->comm, comm);
 325         /*
 326          * every task starts in sleeping state - this gets ignored
 327          * if there's no wakeup pointing to this sleep state:
 328          */
 329         add_sched_event_sleep(task, 0, 0);
 330
 331         pid_to_task[pid] = task;
 332         nr_tasks++;
 333         tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
 334         BUG_ON(!tasks);
 335         tasks[task->nr] = task;
 336
 337         if (verbose)
 338                 printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
 339
 340         return task;
 341 }
 342
 343
 344 static void print_task_traces(void)
 345 {
 346         struct task_desc *task;
 347         unsigned long i;
 348
 349         for (i = 0; i < nr_tasks; i++) {
 350                 task = tasks[i];
 351                 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
 352                         task->nr, task->comm, task->pid, task->nr_events);
 353         }
 354 }
 355
 356 static void add_cross_task_wakeups(void)
 357 {
 358         struct task_desc *task1, *task2;
 359         unsigned long i, j;
 360
 361         for (i = 0; i < nr_tasks; i++) {
 362                 task1 = tasks[i];
 363                 j = i + 1;
 364                 if (j == nr_tasks)
 365                         j = 0;
 366                 task2 = tasks[j];
 367                 add_sched_event_wakeup(task1, 0, task2);
 368         }
 369 }
 370
 371 static void
 372 process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
 373 {
 374         int ret = 0;
 375         u64 now;
 376         long long delta;
 377
 378         now = get_nsecs();
 379         delta = start_time + atom->timestamp - now;
 380
 381         switch (atom->type) {
 382                 case SCHED_EVENT_RUN:
 383                         burn_nsecs(atom->duration);
 384                         break;
 385                 case SCHED_EVENT_SLEEP:
 386                         if (atom->wait_sem)
 387                                 ret = sem_wait(atom->wait_sem);
 388                         BUG_ON(ret);
 389                         break;
 390                 case SCHED_EVENT_WAKEUP:
 391                         if (atom->wait_sem)
 392                                 ret = sem_post(atom->wait_sem);
 393                         BUG_ON(ret);
 394                         break;
 395                 case SCHED_EVENT_MIGRATION:
 396                         break;
 397                 default:
 398                         BUG_ON(1);
 399         }
 400 }
 401
 402 static u64 get_cpu_usage_nsec_parent(void)
 403 {
 404         struct rusage ru;
 405         u64 sum;
 406         int err;
 407
 408         err = getrusage(RUSAGE_SELF, &ru);
 409         BUG_ON(err);
 410
 411         sum =  ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3;
 412         sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3;
 413
 414         return sum;
 415 }
 416
 417 static u64 get_cpu_usage_nsec_self(void)
 418 {
 419         char filename [] = "/proc/1234567890/sched";
 420         unsigned long msecs, nsecs;
 421         char *line = NULL;
 422         u64 total = 0;
 423         size_t len = 0;
 424         ssize_t chars;
 425         FILE *file;
 426         int ret;
 427
 428         sprintf(filename, "/proc/%d/sched", getpid());
 429         file = fopen(filename, "r");
 430         BUG_ON(!file);
 431
 432         while ((chars = getline(&line, &len, file)) != -1) {
 433                 ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n",
 434                         &msecs, &nsecs);
 435                 if (ret == 2) {
 436                         total = msecs*1e6 + nsecs;
 437                         break;
 438                 }
 439         }
 440         if (line)
 441                 free(line);
 442         fclose(file);
 443
 444         return total;
 445 }
 446
 447 static void *thread_func(void *ctx)
 448 {
 449         struct task_desc *this_task = ctx;
 450         u64 cpu_usage_0, cpu_usage_1;
 451         unsigned long i, ret;
 452         char comm2[22];
 453
 454         sprintf(comm2, ":%s", this_task->comm);
 455         prctl(PR_SET_NAME, comm2);
 456
 457 again:
 458         ret = sem_post(&this_task->ready_for_work);
 459         BUG_ON(ret);
 460         ret = pthread_mutex_lock(&start_work_mutex);
 461         BUG_ON(ret);
 462         ret = pthread_mutex_unlock(&start_work_mutex);
 463         BUG_ON(ret);
 464
 465         cpu_usage_0 = get_cpu_usage_nsec_self();
 466
 467         for (i = 0; i < this_task->nr_events; i++) {
 468                 this_task->curr_event = i;
 469                 process_sched_event(this_task, this_task->atoms[i]);
 470         }
 471
 472         cpu_usage_1 = get_cpu_usage_nsec_self();
 473         this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
 474
 475         ret = sem_post(&this_task->work_done_sem);
 476         BUG_ON(ret);
 477
 478         ret = pthread_mutex_lock(&work_done_wait_mutex);
 479         BUG_ON(ret);
 480         ret = pthread_mutex_unlock(&work_done_wait_mutex);
 481         BUG_ON(ret);
 482
 483         goto again;
 484 }
 485
 486 static void create_tasks(void)
 487 {
 488         struct task_desc *task;
 489         pthread_attr_t attr;
 490         unsigned long i;
 491         int err;
 492
 493         err = pthread_attr_init(&attr);
 494         BUG_ON(err);
 495         err = pthread_attr_setstacksize(&attr, (size_t)(16*1024));
 496         BUG_ON(err);
 497         err = pthread_mutex_lock(&start_work_mutex);
 498         BUG_ON(err);
 499         err = pthread_mutex_lock(&work_done_wait_mutex);
 500         BUG_ON(err);
 501         for (i = 0; i < nr_tasks; i++) {
 502                 task = tasks[i];
 503                 sem_init(&task->sleep_sem, 0, 0);
 504                 sem_init(&task->ready_for_work, 0, 0);
 505                 sem_init(&task->work_done_sem, 0, 0);
 506                 task->curr_event = 0;
 507                 err = pthread_create(&task->thread, &attr, thread_func, task);
 508                 BUG_ON(err);
 509         }
 510 }
 511
 512 static void wait_for_tasks(void)
 513 {
 514         u64 cpu_usage_0, cpu_usage_1;
 515         struct task_desc *task;
 516         unsigned long i, ret;
 517
 518         start_time = get_nsecs();
 519         cpu_usage = 0;
 520         pthread_mutex_unlock(&work_done_wait_mutex);
 521
 522         for (i = 0; i < nr_tasks; i++) {
 523                 task = tasks[i];
 524                 ret = sem_wait(&task->ready_for_work);
 525                 BUG_ON(ret);
 526                 sem_init(&task->ready_for_work, 0, 0);
 527         }
 528         ret = pthread_mutex_lock(&work_done_wait_mutex);
 529         BUG_ON(ret);
 530
 531         cpu_usage_0 = get_cpu_usage_nsec_parent();
 532
 533         pthread_mutex_unlock(&start_work_mutex);
 534
 535         for (i = 0; i < nr_tasks; i++) {
 536                 task = tasks[i];
 537                 ret = sem_wait(&task->work_done_sem);
 538                 BUG_ON(ret);
 539                 sem_init(&task->work_done_sem, 0, 0);
 540                 cpu_usage += task->cpu_usage;
 541                 task->cpu_usage = 0;
 542         }
 543
 544         cpu_usage_1 = get_cpu_usage_nsec_parent();
 545         if (!runavg_cpu_usage)
 546                 runavg_cpu_usage = cpu_usage;
 547         runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10;
 548
 549         parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
 550         if (!runavg_parent_cpu_usage)
 551                 runavg_parent_cpu_usage = parent_cpu_usage;
 552         runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 +
 553                                    parent_cpu_usage)/10;
 554
 555         ret = pthread_mutex_lock(&start_work_mutex);
 556         BUG_ON(ret);
 557
 558         for (i = 0; i < nr_tasks; i++) {
 559                 task = tasks[i];
 560                 sem_init(&task->sleep_sem, 0, 0);
 561                 task->curr_event = 0;
 562         }
 563 }
 564
 565 static void run_one_test(void)
 566 {
 567         u64 T0, T1, delta, avg_delta, fluct, std_dev;
 568
 569         T0 = get_nsecs();
 570         wait_for_tasks();
 571         T1 = get_nsecs();
 572
 573         delta = T1 - T0;
 574         sum_runtime += delta;
 575         nr_runs++;
 576
 577         avg_delta = sum_runtime / nr_runs;
 578         if (delta < avg_delta)
 579                 fluct = avg_delta - delta;
 580         else
 581                 fluct = delta - avg_delta;
 582         sum_fluct += fluct;
 583         std_dev = sum_fluct / nr_runs / sqrt(nr_runs);
 584         if (!run_avg)
 585                 run_avg = delta;
 586         run_avg = (run_avg*9 + delta)/10;
 587
 588         printf("#%-3ld: %0.3f, ",
 589                 nr_runs, (double)delta/1000000.0);
 590
 591         printf("ravg: %0.2f, ",
 592                 (double)run_avg/1e6);
 593
 594         printf("cpu: %0.2f / %0.2f",
 595                 (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
 596
 597 #if 0
 598         /*
 599          * rusage statistics done by the parent, these are less
 600          * accurate than the sum_exec_runtime based statistics:
 601          */
 602         printf(" [%0.2f / %0.2f]",
 603                 (double)parent_cpu_usage/1e6,
 604                 (double)runavg_parent_cpu_usage/1e6);
 605 #endif
 606
 607         printf("\n");
 608
 609         if (nr_sleep_corrections)
 610                 printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
 611         nr_sleep_corrections = 0;
 612 }
 613
 614 static void test_calibrations(void)
 615 {
 616         u64 T0, T1;
 617
 618         T0 = get_nsecs();
 619         burn_nsecs(1e6);
 620         T1 = get_nsecs();
 621
 622         printf("the run test took %Ld nsecs\n", T1-T0);
 623
 624         T0 = get_nsecs();
 625         sleep_nsecs(1e6);
 626         T1 = get_nsecs();
 627
 628         printf("the sleep test took %Ld nsecs\n", T1-T0);
 629 }
 630
 631 struct raw_event_sample {
 632         u32 size;
 633         char data[0];
 634 };
 635
 636 #define FILL_FIELD(ptr, field, event, data)     \
 637         ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
 638
 639 #define FILL_ARRAY(ptr, array, event, data)                     \
 640 do {                                                            \
 641         void *__array = raw_field_ptr(event, #array, data);     \
 642         memcpy(ptr.array, __array, sizeof(ptr.array));  \
 643 } while(0)
 644
 645 #define FILL_COMMON_FIELDS(ptr, event, data)                    \
 646 do {                                                            \
 647         FILL_FIELD(ptr, common_type, event, data);              \
 648         FILL_FIELD(ptr, common_flags, event, data);             \
 649         FILL_FIELD(ptr, common_preempt_count, event, data);     \
 650         FILL_FIELD(ptr, common_pid, event, data);               \
 651         FILL_FIELD(ptr, common_tgid, event, data);              \
 652 } while (0)
 653
 654
 655
 656 struct trace_switch_event {
 657         u32 size;
 658
 659         u16 common_type;
 660         u8 common_flags;
 661         u8 common_preempt_count;
 662         u32 common_pid;
 663         u32 common_tgid;
 664
 665         char prev_comm[16];
 666         u32 prev_pid;
 667         u32 prev_prio;
 668         u64 prev_state;
 669         char next_comm[16];
 670         u32 next_pid;
 671         u32 next_prio;
 672 };
 673
 674 struct trace_runtime_event {
 675         u32 size;
 676
 677         u16 common_type;
 678         u8 common_flags;
 679         u8 common_preempt_count;
 680         u32 common_pid;
 681         u32 common_tgid;
 682
 683         char comm[16];
 684         u32 pid;
 685         u64 runtime;
 686         u64 vruntime;
 687 };
 688
 689 struct trace_wakeup_event {
 690         u32 size;
 691
 692         u16 common_type;
 693         u8 common_flags;
 694         u8 common_preempt_count;
 695         u32 common_pid;
 696         u32 common_tgid;
 697
 698         char comm[16];
 699         u32 pid;
 700
 701         u32 prio;
 702         u32 success;
 703         u32 cpu;
 704 };
 705
 706 struct trace_fork_event {
 707         u32 size;
 708
 709         u16 common_type;
 710         u8 common_flags;
 711         u8 common_preempt_count;
 712         u32 common_pid;
 713         u32 common_tgid;
 714
 715         char parent_comm[16];
 716         u32 parent_pid;
 717         char child_comm[16];
 718         u32 child_pid;
 719 };
 720
 721 struct trace_migrate_task_event {
 722         u32 size;
 723
 724         u16 common_type;
 725         u8 common_flags;
 726         u8 common_preempt_count;
 727         u32 common_pid;
 728         u32 common_tgid;
 729
 730         char comm[16];
 731         u32 pid;
 732
 733         u32 prio;
 734         u32 cpu;
 735 };
 736
 737 struct trace_sched_handler {
 738         void (*switch_event)(struct trace_switch_event *,
 739                              struct event *,
 740                              int cpu,
 741                              u64 timestamp,
 742                              struct thread *thread);
 743
 744         void (*runtime_event)(struct trace_runtime_event *,
 745                               struct event *,
 746                               int cpu,
 747                               u64 timestamp,
 748                               struct thread *thread);
 749
 750         void (*wakeup_event)(struct trace_wakeup_event *,
 751                              struct event *,
 752                              int cpu,
 753                              u64 timestamp,
 754                              struct thread *thread);
 755
 756         void (*fork_event)(struct trace_fork_event *,
 757                            struct event *,
 758                            int cpu,
 759                            u64 timestamp,
 760                            struct thread *thread);
 761
 762         void (*migrate_task_event)(struct trace_migrate_task_event *,
 763                            struct event *,
 764                            int cpu,
 765                            u64 timestamp,
 766                            struct thread *thread);
 767 };
 768
 769
 770 static void
 771 replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
 772                     struct event *event,
 773                     int cpu __used,
 774                     u64 timestamp __used,
 775                     struct thread *thread __used)
 776 {
 777         struct task_desc *waker, *wakee;
 778
 779         if (verbose) {
 780                 printf("sched_wakeup event %p\n", event);
 781
 782                 printf(" ... pid %d woke up %s/%d\n",
 783                         wakeup_event->common_pid,
 784                         wakeup_event->comm,
 785                         wakeup_event->pid);
 786         }
 787
 788         waker = register_pid(wakeup_event->common_pid, "<unknown>");
 789         wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
 790
 791         add_sched_event_wakeup(waker, timestamp, wakee);
 792 }
 793
 794 static u64 cpu_last_switched[MAX_CPUS];
 795
 796 static void
 797 replay_switch_event(struct trace_switch_event *switch_event,
 798                     struct event *event,
 799                     int cpu,
 800                     u64 timestamp,
 801                     struct thread *thread __used)
 802 {
 803         struct task_desc *prev, *next;
 804         u64 timestamp0;
 805         s64 delta;
 806
 807         if (verbose)
 808                 printf("sched_switch event %p\n", event);
 809
 810         if (cpu >= MAX_CPUS || cpu < 0)
 811                 return;
 812
 813         timestamp0 = cpu_last_switched[cpu];
 814         if (timestamp0)
 815                 delta = timestamp - timestamp0;
 816         else
 817                 delta = 0;
 818
 819         if (delta < 0)
 820                 die("hm, delta: %Ld < 0 ?\n", delta);
 821
 822         if (verbose) {
 823                 printf(" ... switch from %s/%d to %s/%d [ran %Ld nsecs]\n",
 824                         switch_event->prev_comm, switch_event->prev_pid,
 825                         switch_event->next_comm, switch_event->next_pid,
 826                         delta);
 827         }
 828
 829         prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
 830         next = register_pid(switch_event->next_pid, switch_event->next_comm);
 831
 832         cpu_last_switched[cpu] = timestamp;
 833
 834         add_sched_event_run(prev, timestamp, delta);
 835         add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
 836 }
 837
 838
 839 static void
 840 replay_fork_event(struct trace_fork_event *fork_event,
 841                   struct event *event,
 842                   int cpu __used,
 843                   u64 timestamp __used,
 844                   struct thread *thread __used)
 845 {
 846         if (verbose) {
 847                 printf("sched_fork event %p\n", event);
 848                 printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
 849                 printf("...  child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
 850         }
 851         register_pid(fork_event->parent_pid, fork_event->parent_comm);
 852         register_pid(fork_event->child_pid, fork_event->child_comm);
 853 }
 854
 855 static struct trace_sched_handler replay_ops  = {
 856         .wakeup_event           = replay_wakeup_event,
 857         .switch_event           = replay_switch_event,
 858         .fork_event             = replay_fork_event,
 859 };
 860
 861 struct sort_dimension {
 862         const char              *name;
 863         sort_fn_t               cmp;
 864         struct list_head        list;
 865 };
 866
 867 static LIST_HEAD(cmp_pid);
 868
 869 static int
 870 thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
 871 {
 872         struct sort_dimension *sort;
 873         int ret = 0;
 874
 875         BUG_ON(list_empty(list));
 876
 877         list_for_each_entry(sort, list, list) {
 878                 ret = sort->cmp(l, r);
 879                 if (ret)
 880                         return ret;
 881         }
 882
 883         return ret;
 884 }
 885
 886 static struct work_atoms *
 887 thread_atoms_search(struct rb_root *root, struct thread *thread,
 888                          struct list_head *sort_list)
 889 {
 890         struct rb_node *node = root->rb_node;
 891         struct work_atoms key = { .thread = thread };
 892
 893         while (node) {
 894                 struct work_atoms *atoms;
 895                 int cmp;
 896
 897                 atoms = container_of(node, struct work_atoms, node);
 898
 899                 cmp = thread_lat_cmp(sort_list, &key, atoms);
 900                 if (cmp > 0)
 901                         node = node->rb_left;
 902                 else if (cmp < 0)
 903                         node = node->rb_right;
 904                 else {
 905                         BUG_ON(thread != atoms->thread);
 906                         return atoms;
 907                 }
 908         }
 909         return NULL;
 910 }
 911
 912 static void
 913 __thread_latency_insert(struct rb_root *root, struct work_atoms *data,
 914                          struct list_head *sort_list)
 915 {
 916         struct rb_node **new = &(root->rb_node), *parent = NULL;
 917
 918         while (*new) {
 919                 struct work_atoms *this;
 920                 int cmp;
 921
 922                 this = container_of(*new, struct work_atoms, node);
 923                 parent = *new;
 924
 925                 cmp = thread_lat_cmp(sort_list, data, this);
 926
 927                 if (cmp > 0)
 928                         new = &((*new)->rb_left);
 929                 else
 930                         new = &((*new)->rb_right);
 931         }
 932
 933         rb_link_node(&data->node, parent, new);
 934         rb_insert_color(&data->node, root);
 935 }
 936
 937 static void thread_atoms_insert(struct thread *thread)
 938 {
 939         struct work_atoms *atoms = zalloc(sizeof(*atoms));
 940         if (!atoms)
 941                 die("No memory");
 942
 943         atoms->thread = thread;
 944         INIT_LIST_HEAD(&atoms->work_list);
 945         __thread_latency_insert(&atom_root, atoms, &cmp_pid);
 946 }
 947
 948 static void
 949 latency_fork_event(struct trace_fork_event *fork_event __used,
 950                    struct event *event __used,
 951                    int cpu __used,
 952                    u64 timestamp __used,
 953                    struct thread *thread __used)
 954 {
 955         /* should insert the newcomer */
 956 }
 957
 958 __used
 959 static char sched_out_state(struct trace_switch_event *switch_event)
 960 {
 961         const char *str = TASK_STATE_TO_CHAR_STR;
 962
 963         return str[switch_event->prev_state];
 964 }
 965
 966 static void
 967 add_sched_out_event(struct work_atoms *atoms,
 968                     char run_state,
 969                     u64 timestamp)
 970 {
 971         struct work_atom *atom = zalloc(sizeof(*atom));
 972         if (!atom)
 973                 die("Non memory");
 974
 975         atom->sched_out_time = timestamp;
 976
 977         if (run_state == 'R') {
 978                 atom->state = THREAD_WAIT_CPU;
 979                 atom->wake_up_time = atom->sched_out_time;
 980         }
 981
 982         list_add_tail(&atom->list, &atoms->work_list);
 983 }
 984
 985 static void
 986 add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used)
 987 {
 988         struct work_atom *atom;
 989
 990         BUG_ON(list_empty(&atoms->work_list));
 991
 992         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
 993
 994         atom->runtime += delta;
 995         atoms->total_runtime += delta;
 996 }
 997
 998 static void
 999 add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
1000 {
1001         struct work_atom *atom;
1002         u64 delta;
1003
1004         if (list_empty(&atoms->work_list))
1005                 return;
1006
1007         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1008
1009         if (atom->state != THREAD_WAIT_CPU)
1010                 return;
1011
1012         if (timestamp < atom->wake_up_time) {
1013                 atom->state = THREAD_IGNORE;
1014                 return;
1015         }
1016
1017         atom->state = THREAD_SCHED_IN;
1018         atom->sched_in_time = timestamp;
1019
1020         delta = atom->sched_in_time - atom->wake_up_time;
1021         atoms->total_lat += delta;
1022         if (delta > atoms->max_lat)
1023                 atoms->max_lat = delta;
1024         atoms->nb_atoms++;
1025 }
1026
1027 static void
1028 latency_switch_event(struct trace_switch_event *switch_event,
1029                      struct event *event __used,
1030                      int cpu,
1031                      u64 timestamp,
1032                      struct thread *thread __used)
1033 {
1034         struct work_atoms *out_events, *in_events;
1035         struct thread *sched_out, *sched_in;
1036         u64 timestamp0;
1037         s64 delta;
1038
1039         BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1040
1041         timestamp0 = cpu_last_switched[cpu];
1042         cpu_last_switched[cpu] = timestamp;
1043         if (timestamp0)
1044                 delta = timestamp - timestamp0;
1045         else
1046                 delta = 0;
1047
1048         if (delta < 0)
1049                 die("hm, delta: %Ld < 0 ?\n", delta);
1050
1051
1052         sched_out = threads__findnew(switch_event->prev_pid);
1053         sched_in = threads__findnew(switch_event->next_pid);
1054
1055         out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1056         if (!out_events) {
1057                 thread_atoms_insert(sched_out);
1058                 out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
1059                 if (!out_events)
1060                         die("out-event: Internal tree error");
1061         }
1062         add_sched_out_event(out_events, sched_out_state(switch_event), timestamp);
1063
1064         in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1065         if (!in_events) {
1066                 thread_atoms_insert(sched_in);
1067                 in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
1068                 if (!in_events)
1069                         die("in-event: Internal tree error");
1070                 /*
1071                  * Take came in we have not heard about yet,
1072                  * add in an initial atom in runnable state:
1073                  */
1074                 add_sched_out_event(in_events, 'R', timestamp);
1075         }
1076         add_sched_in_event(in_events, timestamp);
1077 }
1078
1079 static void
1080 latency_runtime_event(struct trace_runtime_event *runtime_event,
1081                      struct event *event __used,
1082                      int cpu,
1083                      u64 timestamp,
1084                      struct thread *this_thread __used)
1085 {
1086         struct thread *thread = threads__findnew(runtime_event->pid);
1087         struct work_atoms *atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1088
1089         BUG_ON(cpu >= MAX_CPUS || cpu < 0);
1090         if (!atoms) {
1091                 thread_atoms_insert(thread);
1092                 atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
1093                 if (!atoms)
1094                         die("in-event: Internal tree error");
1095                 add_sched_out_event(atoms, 'R', timestamp);
1096         }
1097
1098         add_runtime_event(atoms, runtime_event->runtime, timestamp);
1099 }
1100
1101 static void
1102 latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
1103                      struct event *__event __used,
1104                      int cpu __used,
1105                      u64 timestamp,
1106                      struct thread *thread __used)
1107 {
1108         struct work_atoms *atoms;
1109         struct work_atom *atom;
1110         struct thread *wakee;
1111
1112         /* Note for later, it may be interesting to observe the failing cases */
1113         if (!wakeup_event->success)
1114                 return;
1115
1116         wakee = threads__findnew(wakeup_event->pid);
1117         atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1118         if (!atoms) {
1119                 thread_atoms_insert(wakee);
1120                 atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
1121                 if (!atoms)
1122                         die("wakeup-event: Internal tree error");
1123                 add_sched_out_event(atoms, 'S', timestamp);
1124         }
1125
1126         BUG_ON(list_empty(&atoms->work_list));
1127
1128         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1129
1130         /*
1131          * You WILL be missing events if you've recorded only
1132          * one CPU, or are only looking at only one, so don't
1133          * make useless noise.
1134          */
1135         if (profile_cpu == -1 && atom->state != THREAD_SLEEPING)
1136                 nr_state_machine_bugs++;
1137
1138         nr_timestamps++;
1139         if (atom->sched_out_time > timestamp) {
1140                 nr_unordered_timestamps++;
1141                 return;
1142         }
1143
1144         atom->state = THREAD_WAIT_CPU;
1145         atom->wake_up_time = timestamp;
1146 }
1147
1148 static void
1149 latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
1150                      struct event *__event __used,
1151                      int cpu __used,
1152                      u64 timestamp,
1153                      struct thread *thread __used)
1154 {
1155         struct work_atoms *atoms;
1156         struct work_atom *atom;
1157         struct thread *migrant;
1158
1159         /*
1160          * Only need to worry about migration when profiling one CPU.
1161          */
1162         if (profile_cpu == -1)
1163                 return;
1164
1165         migrant = threads__findnew(migrate_task_event->pid);
1166         atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1167         if (!atoms) {
1168                 thread_atoms_insert(migrant);
1169                 register_pid(migrant->pid, migrant->comm);
1170                 atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
1171                 if (!atoms)
1172                         die("migration-event: Internal tree error");
1173                 add_sched_out_event(atoms, 'R', timestamp);
1174         }
1175
1176         BUG_ON(list_empty(&atoms->work_list));
1177
1178         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1179         atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1180
1181         nr_timestamps++;
1182
1183         if (atom->sched_out_time > timestamp)
1184                 nr_unordered_timestamps++;
1185 }
1186
1187 static struct trace_sched_handler lat_ops  = {
1188         .wakeup_event           = latency_wakeup_event,
1189         .switch_event           = latency_switch_event,
1190         .runtime_event          = latency_runtime_event,
1191         .fork_event             = latency_fork_event,
1192         .migrate_task_event     = latency_migrate_task_event,
1193 };
1194
1195 static void output_lat_thread(struct work_atoms *work_list)
1196 {
1197         int i;
1198         int ret;
1199         u64 avg;
1200
1201         if (!work_list->nb_atoms)
1202                 return;
1203         /*
1204          * Ignore idle threads:
1205          */
1206         if (!strcmp(work_list->thread->comm, "swapper"))
1207                 return;
1208
1209         all_runtime += work_list->total_runtime;
1210         all_count += work_list->nb_atoms;
1211
1212         ret = printf("  %s:%d ", work_list->thread->comm, work_list->thread->pid);
1213
1214         for (i = 0; i < 24 - ret; i++)
1215                 printf(" ");
1216
1217         avg = work_list->total_lat / work_list->nb_atoms;
1218
1219         printf("|%11.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms |\n",
1220               (double)work_list->total_runtime / 1e6,
1221                  work_list->nb_atoms, (double)avg / 1e6,
1222                  (double)work_list->max_lat / 1e6);
1223 }
1224
1225 static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
1226 {
1227         if (l->thread->pid < r->thread->pid)
1228                 return -1;
1229         if (l->thread->pid > r->thread->pid)
1230                 return 1;
1231
1232         return 0;
1233 }
1234
1235 static struct sort_dimension pid_sort_dimension = {
1236         .name                   = "pid",
1237         .cmp                    = pid_cmp,
1238 };
1239
1240 static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
1241 {
1242         u64 avgl, avgr;
1243
1244         if (!l->nb_atoms)
1245                 return -1;
1246
1247         if (!r->nb_atoms)
1248                 return 1;
1249
1250         avgl = l->total_lat / l->nb_atoms;
1251         avgr = r->total_lat / r->nb_atoms;
1252
1253         if (avgl < avgr)
1254                 return -1;
1255         if (avgl > avgr)
1256                 return 1;
1257
1258         return 0;
1259 }
1260
1261 static struct sort_dimension avg_sort_dimension = {
1262         .name                   = "avg",
1263         .cmp                    = avg_cmp,
1264 };
1265
1266 static int max_cmp(struct work_atoms *l, struct work_atoms *r)
1267 {
1268         if (l->max_lat < r->max_lat)
1269                 return -1;
1270         if (l->max_lat > r->max_lat)
1271                 return 1;
1272
1273         return 0;
1274 }
1275
1276 static struct sort_dimension max_sort_dimension = {
1277         .name                   = "max",
1278         .cmp                    = max_cmp,
1279 };
1280
1281 static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
1282 {
1283         if (l->nb_atoms < r->nb_atoms)
1284                 return -1;
1285         if (l->nb_atoms > r->nb_atoms)
1286                 return 1;
1287
1288         return 0;
1289 }
1290
1291 static struct sort_dimension switch_sort_dimension = {
1292         .name                   = "switch",
1293         .cmp                    = switch_cmp,
1294 };
1295
1296 static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
1297 {
1298         if (l->total_runtime < r->total_runtime)
1299                 return -1;
1300         if (l->total_runtime > r->total_runtime)
1301                 return 1;
1302
1303         return 0;
1304 }
1305
1306 static struct sort_dimension runtime_sort_dimension = {
1307         .name                   = "runtime",
1308         .cmp                    = runtime_cmp,
1309 };
1310
1311 static struct sort_dimension *available_sorts[] = {
1312         &pid_sort_dimension,
1313         &avg_sort_dimension,
1314         &max_sort_dimension,
1315         &switch_sort_dimension,
1316         &runtime_sort_dimension,
1317 };
1318
1319 #define NB_AVAILABLE_SORTS      (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
1320
1321 static LIST_HEAD(sort_list);
1322
1323 static int sort_dimension__add(const char *tok, struct list_head *list)
1324 {
1325         int i;
1326
1327         for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
1328                 if (!strcmp(available_sorts[i]->name, tok)) {
1329                         list_add_tail(&available_sorts[i]->list, list);
1330
1331                         return 0;
1332                 }
1333         }
1334
1335         return -1;
1336 }
1337
1338 static void setup_sorting(void);
1339
1340 static void sort_lat(void)
1341 {
1342         struct rb_node *node;
1343
1344         for (;;) {
1345                 struct work_atoms *data;
1346                 node = rb_first(&atom_root);
1347                 if (!node)
1348                         break;
1349
1350                 rb_erase(node, &atom_root);
1351                 data = rb_entry(node, struct work_atoms, node);
1352                 __thread_latency_insert(&sorted_atom_root, data, &sort_list);
1353         }
1354 }
1355
1356 static struct trace_sched_handler *trace_handler;
1357
1358 static void
1359 process_sched_wakeup_event(struct raw_event_sample *raw,
1360                            struct event *event,
1361                            int cpu __used,
1362                            u64 timestamp __used,
1363                            struct thread *thread __used)
1364 {
1365         struct trace_wakeup_event wakeup_event;
1366
1367         FILL_COMMON_FIELDS(wakeup_event, event, raw->data);
1368
1369         FILL_ARRAY(wakeup_event, comm, event, raw->data);
1370         FILL_FIELD(wakeup_event, pid, event, raw->data);
1371         FILL_FIELD(wakeup_event, prio, event, raw->data);
1372         FILL_FIELD(wakeup_event, success, event, raw->data);
1373         FILL_FIELD(wakeup_event, cpu, event, raw->data);
1374
1375         if (trace_handler->wakeup_event)
1376                 trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
1377 }
1378
1379 /*
1380  * Track the current task - that way we can know whether there's any
1381  * weird events, such as a task being switched away that is not current.
1382  */
1383 static int max_cpu;
1384
1385 static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
1386
1387 static struct thread *curr_thread[MAX_CPUS];
1388
1389 static char next_shortname1 = 'A';
1390 static char next_shortname2 = '0';
1391
1392 static void
1393 map_switch_event(struct trace_switch_event *switch_event,
1394                  struct event *event __used,
1395                  int this_cpu,
1396                  u64 timestamp,
1397                  struct thread *thread __used)
1398 {
1399         struct thread *sched_out, *sched_in;
1400         int new_shortname;
1401         u64 timestamp0;
1402         s64 delta;
1403         int cpu;
1404
1405         BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1406
1407         if (this_cpu > max_cpu)
1408                 max_cpu = this_cpu;
1409
1410         timestamp0 = cpu_last_switched[this_cpu];
1411         cpu_last_switched[this_cpu] = timestamp;
1412         if (timestamp0)
1413                 delta = timestamp - timestamp0;
1414         else
1415                 delta = 0;
1416
1417         if (delta < 0)
1418                 die("hm, delta: %Ld < 0 ?\n", delta);
1419
1420
1421         sched_out = threads__findnew(switch_event->prev_pid);
1422         sched_in = threads__findnew(switch_event->next_pid);
1423
1424         curr_thread[this_cpu] = sched_in;
1425
1426         printf("  ");
1427
1428         new_shortname = 0;
1429         if (!sched_in->shortname[0]) {
1430                 sched_in->shortname[0] = next_shortname1;
1431                 sched_in->shortname[1] = next_shortname2;
1432
1433                 if (next_shortname1 < 'Z') {
1434                         next_shortname1++;
1435                 } else {
1436                         next_shortname1='A';
1437                         if (next_shortname2 < '9') {
1438                                 next_shortname2++;
1439                         } else {
1440                                 next_shortname2='0';
1441                         }
1442                 }
1443                 new_shortname = 1;
1444         }
1445
1446         for (cpu = 0; cpu <= max_cpu; cpu++) {
1447                 if (cpu != this_cpu)
1448                         printf(" ");
1449                 else
1450                         printf("*");
1451
1452                 if (curr_thread[cpu]) {
1453                         if (curr_thread[cpu]->pid)
1454                                 printf("%2s ", curr_thread[cpu]->shortname);
1455                         else
1456                                 printf(".  ");
1457                 } else
1458                         printf("   ");
1459         }
1460
1461         printf("  %12.6f secs ", (double)timestamp/1e9);
1462         if (new_shortname) {
1463                 printf("%s => %s:%d\n",
1464                         sched_in->shortname, sched_in->comm, sched_in->pid);
1465         } else {
1466                 printf("\n");
1467         }
1468 }
1469
1470
1471 static void
1472 process_sched_switch_event(struct raw_event_sample *raw,
1473                            struct event *event,
1474                            int this_cpu,
1475                            u64 timestamp __used,
1476                            struct thread *thread __used)
1477 {
1478         struct trace_switch_event switch_event;
1479
1480         FILL_COMMON_FIELDS(switch_event, event, raw->data);
1481
1482         FILL_ARRAY(switch_event, prev_comm, event, raw->data);
1483         FILL_FIELD(switch_event, prev_pid, event, raw->data);
1484         FILL_FIELD(switch_event, prev_prio, event, raw->data);
1485         FILL_FIELD(switch_event, prev_state, event, raw->data);
1486         FILL_ARRAY(switch_event, next_comm, event, raw->data);
1487         FILL_FIELD(switch_event, next_pid, event, raw->data);
1488         FILL_FIELD(switch_event, next_prio, event, raw->data);
1489
1490         if (curr_pid[this_cpu] != (u32)-1) {
1491                 /*
1492                  * Are we trying to switch away a PID that is
1493                  * not current?
1494                  */
1495                 if (curr_pid[this_cpu] != switch_event.prev_pid)
1496                         nr_context_switch_bugs++;
1497         }
1498         if (trace_handler->switch_event)
1499                 trace_handler->switch_event(&switch_event, event, this_cpu, timestamp, thread);
1500
1501         curr_pid[this_cpu] = switch_event.next_pid;
1502 }
1503
1504 static void
1505 process_sched_runtime_event(struct raw_event_sample *raw,
1506                            struct event *event,
1507                            int cpu __used,
1508                            u64 timestamp __used,
1509                            struct thread *thread __used)
1510 {
1511         struct trace_runtime_event runtime_event;
1512
1513         FILL_ARRAY(runtime_event, comm, event, raw->data);
1514         FILL_FIELD(runtime_event, pid, event, raw->data);
1515         FILL_FIELD(runtime_event, runtime, event, raw->data);
1516         FILL_FIELD(runtime_event, vruntime, event, raw->data);
1517
1518         if (trace_handler->runtime_event)
1519                 trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
1520 }
1521
1522 static void
1523 process_sched_fork_event(struct raw_event_sample *raw,
1524                          struct event *event,
1525                          int cpu __used,
1526                          u64 timestamp __used,
1527                          struct thread *thread __used)
1528 {
1529         struct trace_fork_event fork_event;
1530
1531         FILL_COMMON_FIELDS(fork_event, event, raw->data);
1532
1533         FILL_ARRAY(fork_event, parent_comm, event, raw->data);
1534         FILL_FIELD(fork_event, parent_pid, event, raw->data);
1535         FILL_ARRAY(fork_event, child_comm, event, raw->data);
1536         FILL_FIELD(fork_event, child_pid, event, raw->data);
1537
1538         if (trace_handler->fork_event)
1539                 trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
1540 }
1541
1542 static void
1543 process_sched_exit_event(struct event *event,
1544                          int cpu __used,
1545                          u64 timestamp __used,
1546                          struct thread *thread __used)
1547 {
1548         if (verbose)
1549                 printf("sched_exit event %p\n", event);
1550 }
1551
1552 static void
1553 process_sched_migrate_task_event(struct raw_event_sample *raw,
1554                            struct event *event,
1555                            int cpu __used,
1556                            u64 timestamp __used,
1557                            struct thread *thread __used)
1558 {
1559         struct trace_migrate_task_event migrate_task_event;
1560
1561         FILL_COMMON_FIELDS(migrate_task_event, event, raw->data);
1562
1563         FILL_ARRAY(migrate_task_event, comm, event, raw->data);
1564         FILL_FIELD(migrate_task_event, pid, event, raw->data);
1565         FILL_FIELD(migrate_task_event, prio, event, raw->data);
1566         FILL_FIELD(migrate_task_event, cpu, event, raw->data);
1567
1568         if (trace_handler->migrate_task_event)
1569                 trace_handler->migrate_task_event(&migrate_task_event, event, cpu, timestamp, thread);
1570 }
1571
1572 static void
1573 process_raw_event(event_t *raw_event __used, void *more_data,
1574                   int cpu, u64 timestamp, struct thread *thread)
1575 {
1576         struct raw_event_sample *raw = more_data;
1577         struct event *event;
1578         int type;
1579
1580         type = trace_parse_common_type(raw->data);
1581         event = trace_find_event(type);
1582
1583         if (!strcmp(event->name, "sched_switch"))
1584                 process_sched_switch_event(raw, event, cpu, timestamp, thread);
1585         if (!strcmp(event->name, "sched_stat_runtime"))
1586                 process_sched_runtime_event(raw, event, cpu, timestamp, thread);
1587         if (!strcmp(event->name, "sched_wakeup"))
1588                 process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
1589         if (!strcmp(event->name, "sched_wakeup_new"))
1590                 process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
1591         if (!strcmp(event->name, "sched_process_fork"))
1592                 process_sched_fork_event(raw, event, cpu, timestamp, thread);
1593         if (!strcmp(event->name, "sched_process_exit"))
1594                 process_sched_exit_event(event, cpu, timestamp, thread);
1595         if (!strcmp(event->name, "sched_migrate_task"))
1596                 process_sched_migrate_task_event(raw, event, cpu, timestamp, thread);
1597 }
1598
1599 static int process_sample_event(event_t *event)
1600 {
1601         struct sample_data data;
1602         struct thread *thread;
1603
1604         if (!(sample_type & PERF_SAMPLE_RAW))
1605                 return 0;
1606
1607         memset(&data, 0, sizeof(data));
1608         data.time = -1;
1609         data.cpu = -1;
1610         data.period = -1;
1611
1612         event__parse_sample(event, sample_type, &data);
1613
1614         dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
1615                 event->header.misc,
1616                 data.pid, data.tid,
1617                 (void *)(long)data.ip,
1618                 (long long)data.period);
1619
1620         thread = threads__findnew(data.pid);
1621         if (thread == NULL) {
1622                 pr_debug("problem processing %d event, skipping it.\n",
1623                          event->header.type);
1624                 return -1;
1625         }
1626
1627         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
1628
1629         if (profile_cpu != -1 && profile_cpu != (int)data.cpu)
1630                 return 0;
1631
1632         process_raw_event(event, data.raw_data, data.cpu, data.time, thread);
1633
1634         return 0;
1635 }
1636
1637 static int process_lost_event(event_t *event __used)
1638 {
1639         nr_lost_chunks++;
1640         nr_lost_events += event->lost.lost;
1641
1642         return 0;
1643 }
1644
1645 static int sample_type_check(u64 type)
1646 {
1647         sample_type = type;
1648
1649         if (!(sample_type & PERF_SAMPLE_RAW)) {
1650                 fprintf(stderr,
1651                         "No trace sample to read. Did you call perf record "
1652                         "without -R?");
1653                 return -1;
1654         }
1655
1656         return 0;
1657 }
1658
1659 static struct perf_file_handler file_handler = {
1660         .process_sample_event   = process_sample_event,
1661         .process_comm_event     = event__process_comm,
1662         .process_lost_event     = process_lost_event,
1663         .sample_type_check      = sample_type_check,
1664 };
1665
1666 static int read_events(void)
1667 {
1668         register_idle_thread();
1669         register_perf_file_handler(&file_handler);
1670
1671         return mmap_dispatch_perf_file(&header, input_name, 0, 0,
1672                                        &event__cwdlen, &event__cwd);
1673 }
1674
1675 static void print_bad_events(void)
1676 {
1677         if (nr_unordered_timestamps && nr_timestamps) {
1678                 printf("  INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
1679                         (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
1680                         nr_unordered_timestamps, nr_timestamps);
1681         }
1682         if (nr_lost_events && nr_events) {
1683                 printf("  INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
1684                         (double)nr_lost_events/(double)nr_events*100.0,
1685                         nr_lost_events, nr_events, nr_lost_chunks);
1686         }
1687         if (nr_state_machine_bugs && nr_timestamps) {
1688                 printf("  INFO: %.3f%% state machine bugs (%ld out of %ld)",
1689                         (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
1690                         nr_state_machine_bugs, nr_timestamps);
1691                 if (nr_lost_events)
1692                         printf(" (due to lost events?)");
1693                 printf("\n");
1694         }
1695         if (nr_context_switch_bugs && nr_timestamps) {
1696                 printf("  INFO: %.3f%% context switch bugs (%ld out of %ld)",
1697                         (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
1698                         nr_context_switch_bugs, nr_timestamps);
1699                 if (nr_lost_events)
1700                         printf(" (due to lost events?)");
1701                 printf("\n");
1702         }
1703 }
1704
1705 static void __cmd_lat(void)
1706 {
1707         struct rb_node *next;
1708
1709         setup_pager();
1710         read_events();
1711         sort_lat();
1712
1713         printf("\n -----------------------------------------------------------------------------------------\n");
1714         printf("  Task                  |   Runtime ms  | Switches | Average delay ms | Maximum delay ms |\n");
1715         printf(" -----------------------------------------------------------------------------------------\n");
1716
1717         next = rb_first(&sorted_atom_root);
1718
1719         while (next) {
1720                 struct work_atoms *work_list;
1721
1722                 work_list = rb_entry(next, struct work_atoms, node);
1723                 output_lat_thread(work_list);
1724                 next = rb_next(next);
1725         }
1726
1727         printf(" -----------------------------------------------------------------------------------------\n");
1728         printf("  TOTAL:                |%11.3f ms |%9Ld |\n",
1729                 (double)all_runtime/1e6, all_count);
1730
1731         printf(" ---------------------------------------------------\n");
1732
1733         print_bad_events();
1734         printf("\n");
1735
1736 }
1737
1738 static struct trace_sched_handler map_ops  = {
1739         .wakeup_event           = NULL,
1740         .switch_event           = map_switch_event,
1741         .runtime_event          = NULL,
1742         .fork_event             = NULL,
1743 };
1744
1745 static void __cmd_map(void)
1746 {
1747         max_cpu = sysconf(_SC_NPROCESSORS_CONF);
1748
1749         setup_pager();
1750         read_events();
1751         print_bad_events();
1752 }
1753
1754 static void __cmd_replay(void)
1755 {
1756         unsigned long i;
1757
1758         calibrate_run_measurement_overhead();
1759         calibrate_sleep_measurement_overhead();
1760
1761         test_calibrations();
1762
1763         read_events();
1764
1765         printf("nr_run_events:        %ld\n", nr_run_events);
1766         printf("nr_sleep_events:      %ld\n", nr_sleep_events);
1767         printf("nr_wakeup_events:     %ld\n", nr_wakeup_events);
1768
1769         if (targetless_wakeups)
1770                 printf("target-less wakeups:  %ld\n", targetless_wakeups);
1771         if (multitarget_wakeups)
1772                 printf("multi-target wakeups: %ld\n", multitarget_wakeups);
1773         if (nr_run_events_optimized)
1774                 printf("run atoms optimized: %ld\n",
1775                         nr_run_events_optimized);
1776
1777         print_task_traces();
1778         add_cross_task_wakeups();
1779
1780         create_tasks();
1781         printf("------------------------------------------------------------\n");
1782         for (i = 0; i < replay_repeat; i++)
1783                 run_one_test();
1784 }
1785
1786
1787 static const char * const sched_usage[] = {
1788         "perf sched [<options>] {record|latency|map|replay|trace}",
1789         NULL
1790 };
1791
1792 static const struct option sched_options[] = {
1793         OPT_STRING('i', "input", &input_name, "file",
1794                     "input file name"),
1795         OPT_BOOLEAN('v', "verbose", &verbose,
1796                     "be more verbose (show symbol address, etc)"),
1797         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1798                     "dump raw trace in ASCII"),
1799         OPT_END()
1800 };
1801
1802 static const char * const latency_usage[] = {
1803         "perf sched latency [<options>]",
1804         NULL
1805 };
1806
1807 static const struct option latency_options[] = {
1808         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1809                    "sort by key(s): runtime, switch, avg, max"),
1810         OPT_BOOLEAN('v', "verbose", &verbose,
1811                     "be more verbose (show symbol address, etc)"),
1812         OPT_INTEGER('C', "CPU", &profile_cpu,
1813                     "CPU to profile on"),
1814         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1815                     "dump raw trace in ASCII"),
1816         OPT_END()
1817 };
1818
1819 static const char * const replay_usage[] = {
1820         "perf sched replay [<options>]",
1821         NULL
1822 };
1823
1824 static const struct option replay_options[] = {
1825         OPT_INTEGER('r', "repeat", &replay_repeat,
1826                     "repeat the workload replay N times (-1: infinite)"),
1827         OPT_BOOLEAN('v', "verbose", &verbose,
1828                     "be more verbose (show symbol address, etc)"),
1829         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1830                     "dump raw trace in ASCII"),
1831         OPT_END()
1832 };
1833
1834 static void setup_sorting(void)
1835 {
1836         char *tmp, *tok, *str = strdup(sort_order);
1837
1838         for (tok = strtok_r(str, ", ", &tmp);
1839                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
1840                 if (sort_dimension__add(tok, &sort_list) < 0) {
1841                         error("Unknown --sort key: `%s'", tok);
1842                         usage_with_options(latency_usage, latency_options);
1843                 }
1844         }
1845
1846         free(str);
1847
1848         sort_dimension__add("pid", &cmp_pid);
1849 }
1850
1851 static const char *record_args[] = {
1852         "record",
1853         "-a",
1854         "-R",
1855         "-M",
1856         "-f",
1857         "-m", "1024",
1858         "-c", "1",
1859         "-e", "sched:sched_switch:r",
1860         "-e", "sched:sched_stat_wait:r",
1861         "-e", "sched:sched_stat_sleep:r",
1862         "-e", "sched:sched_stat_iowait:r",
1863         "-e", "sched:sched_stat_runtime:r",
1864         "-e", "sched:sched_process_exit:r",
1865         "-e", "sched:sched_process_fork:r",
1866         "-e", "sched:sched_wakeup:r",
1867         "-e", "sched:sched_migrate_task:r",
1868 };
1869
1870 static int __cmd_record(int argc, const char **argv)
1871 {
1872         unsigned int rec_argc, i, j;
1873         const char **rec_argv;
1874
1875         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1876         rec_argv = calloc(rec_argc + 1, sizeof(char *));
1877
1878         for (i = 0; i < ARRAY_SIZE(record_args); i++)
1879                 rec_argv[i] = strdup(record_args[i]);
1880
1881         for (j = 1; j < (unsigned int)argc; j++, i++)
1882                 rec_argv[i] = argv[j];
1883
1884         BUG_ON(i != rec_argc);
1885
1886         return cmd_record(i, rec_argv, NULL);
1887 }
1888
1889 int cmd_sched(int argc, const char **argv, const char *prefix __used)
1890 {
1891         symbol__init(0);
1892
1893         argc = parse_options(argc, argv, sched_options, sched_usage,
1894                              PARSE_OPT_STOP_AT_NON_OPTION);
1895         if (!argc)
1896                 usage_with_options(sched_usage, sched_options);
1897
1898         if (!strncmp(argv[0], "rec", 3)) {
1899                 return __cmd_record(argc, argv);
1900         } else if (!strncmp(argv[0], "lat", 3)) {
1901                 trace_handler = &lat_ops;
1902                 if (argc > 1) {
1903                         argc = parse_options(argc, argv, latency_options, latency_usage, 0);
1904                         if (argc)
1905                                 usage_with_options(latency_usage, latency_options);
1906                 }
1907                 setup_sorting();
1908                 __cmd_lat();
1909         } else if (!strcmp(argv[0], "map")) {
1910                 trace_handler = &map_ops;
1911                 setup_sorting();
1912                 __cmd_map();
1913         } else if (!strncmp(argv[0], "rep", 3)) {
1914                 trace_handler = &replay_ops;
1915                 if (argc) {
1916                         argc = parse_options(argc, argv, replay_options, replay_usage, 0);
1917                         if (argc)
1918                                 usage_with_options(replay_usage, replay_options);
1919                 }
1920                 __cmd_replay();
1921         } else if (!strcmp(argv[0], "trace")) {
1922                 /*
1923                  * Aliased to 'perf trace' for now:
1924                  */
1925                 return cmd_trace(argc, argv, prefix);
1926         } else {
1927                 usage_with_options(sched_usage, sched_options);
1928         }
1929
1930         return 0;
1931 }