tools/perf/builtin-timechart.c

   1 /*
   2  * builtin-timechart.c - make an svg timechart of system activity
   3  *
   4  * (C) Copyright 2009 Intel Corporation
   5  *
   6  * Authors:
   7  *     Arjan van de Ven <arjan@linux.intel.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; version 2
  12  * of the License.
  13  */
  14
  15 #include <traceevent/event-parse.h>
  16
  17 #include "builtin.h"
  18
  19 #include "util/util.h"
  20
  21 #include "util/color.h"
  22 #include <linux/list.h>
  23 #include "util/cache.h"
  24 #include "util/evlist.h"
  25 #include "util/evsel.h"
  26 #include <linux/rbtree.h>
  27 #include "util/symbol.h"
  28 #include "util/callchain.h"
  29 #include "util/strlist.h"
  30
  31 #include "perf.h"
  32 #include "util/header.h"
  33 #include "util/parse-options.h"
  34 #include "util/parse-events.h"
  35 #include "util/event.h"
  36 #include "util/session.h"
  37 #include "util/svghelper.h"
  38 #include "util/tool.h"
  39 #include "util/data.h"
  40
  41 #define SUPPORT_OLD_POWER_EVENTS 1
  42 #define PWR_EVENT_EXIT -1
  43
  44
  45 static unsigned int     numcpus;
  46 static u64              min_freq;       /* Lowest CPU frequency seen */
  47 static u64              max_freq;       /* Highest CPU frequency seen */
  48 static u64              turbo_frequency;
  49
  50 static u64              first_time, last_time;
  51
  52 static bool             power_only;
  53
  54
  55 struct per_pid;
  56 struct per_pidcomm;
  57
  58 struct cpu_sample;
  59 struct power_event;
  60 struct wake_event;
  61
  62 struct sample_wrapper;
  63
  64 /*
  65  * Datastructure layout:
  66  * We keep an list of "pid"s, matching the kernels notion of a task struct.
  67  * Each "pid" entry, has a list of "comm"s.
  68  *      this is because we want to track different programs different, while
  69  *      exec will reuse the original pid (by design).
  70  * Each comm has a list of samples that will be used to draw
  71  * final graph.
  72  */
  73
  74 struct per_pid {
  75         struct per_pid *next;
  76
  77         int             pid;
  78         int             ppid;
  79
  80         u64             start_time;
  81         u64             end_time;
  82         u64             total_time;
  83         int             display;
  84
  85         struct per_pidcomm *all;
  86         struct per_pidcomm *current;
  87 };
  88
  89
  90 struct per_pidcomm {
  91         struct per_pidcomm *next;
  92
  93         u64             start_time;
  94         u64             end_time;
  95         u64             total_time;
  96
  97         int             Y;
  98         int             display;
  99
 100         long            state;
 101         u64             state_since;
 102
 103         char            *comm;
 104
 105         struct cpu_sample *samples;
 106 };
 107
 108 struct sample_wrapper {
 109         struct sample_wrapper *next;
 110
 111         u64             timestamp;
 112         unsigned char   data[0];
 113 };
 114
 115 #define TYPE_NONE       0
 116 #define TYPE_RUNNING    1
 117 #define TYPE_WAITING    2
 118 #define TYPE_BLOCKED    3
 119
 120 struct cpu_sample {
 121         struct cpu_sample *next;
 122
 123         u64 start_time;
 124         u64 end_time;
 125         int type;
 126         int cpu;
 127 };
 128
 129 static struct per_pid *all_data;
 130
 131 #define CSTATE 1
 132 #define PSTATE 2
 133
 134 struct power_event {
 135         struct power_event *next;
 136         int type;
 137         int state;
 138         u64 start_time;
 139         u64 end_time;
 140         int cpu;
 141 };
 142
 143 struct wake_event {
 144         struct wake_event *next;
 145         int waker;
 146         int wakee;
 147         u64 time;
 148 };
 149
 150 static struct power_event    *power_events;
 151 static struct wake_event     *wake_events;
 152
 153 struct process_filter;
 154 struct process_filter {
 155         char                    *name;
 156         int                     pid;
 157         struct process_filter   *next;
 158 };
 159
 160 static struct process_filter *process_filter;
 161
 162
 163 static struct per_pid *find_create_pid(int pid)
 164 {
 165         struct per_pid *cursor = all_data;
 166
 167         while (cursor) {
 168                 if (cursor->pid == pid)
 169                         return cursor;
 170                 cursor = cursor->next;
 171         }
 172         cursor = zalloc(sizeof(*cursor));
 173         assert(cursor != NULL);
 174         cursor->pid = pid;
 175         cursor->next = all_data;
 176         all_data = cursor;
 177         return cursor;
 178 }
 179
 180 static void pid_set_comm(int pid, char *comm)
 181 {
 182         struct per_pid *p;
 183         struct per_pidcomm *c;
 184         p = find_create_pid(pid);
 185         c = p->all;
 186         while (c) {
 187                 if (c->comm && strcmp(c->comm, comm) == 0) {
 188                         p->current = c;
 189                         return;
 190                 }
 191                 if (!c->comm) {
 192                         c->comm = strdup(comm);
 193                         p->current = c;
 194                         return;
 195                 }
 196                 c = c->next;
 197         }
 198         c = zalloc(sizeof(*c));
 199         assert(c != NULL);
 200         c->comm = strdup(comm);
 201         p->current = c;
 202         c->next = p->all;
 203         p->all = c;
 204 }
 205
 206 static void pid_fork(int pid, int ppid, u64 timestamp)
 207 {
 208         struct per_pid *p, *pp;
 209         p = find_create_pid(pid);
 210         pp = find_create_pid(ppid);
 211         p->ppid = ppid;
 212         if (pp->current && pp->current->comm && !p->current)
 213                 pid_set_comm(pid, pp->current->comm);
 214
 215         p->start_time = timestamp;
 216         if (p->current) {
 217                 p->current->start_time = timestamp;
 218                 p->current->state_since = timestamp;
 219         }
 220 }
 221
 222 static void pid_exit(int pid, u64 timestamp)
 223 {
 224         struct per_pid *p;
 225         p = find_create_pid(pid);
 226         p->end_time = timestamp;
 227         if (p->current)
 228                 p->current->end_time = timestamp;
 229 }
 230
 231 static void
 232 pid_put_sample(int pid, int type, unsigned int cpu, u64 start, u64 end)
 233 {
 234         struct per_pid *p;
 235         struct per_pidcomm *c;
 236         struct cpu_sample *sample;
 237
 238         p = find_create_pid(pid);
 239         c = p->current;
 240         if (!c) {
 241                 c = zalloc(sizeof(*c));
 242                 assert(c != NULL);
 243                 p->current = c;
 244                 c->next = p->all;
 245                 p->all = c;
 246         }
 247
 248         sample = zalloc(sizeof(*sample));
 249         assert(sample != NULL);
 250         sample->start_time = start;
 251         sample->end_time = end;
 252         sample->type = type;
 253         sample->next = c->samples;
 254         sample->cpu = cpu;
 255         c->samples = sample;
 256
 257         if (sample->type == TYPE_RUNNING && end > start && start > 0) {
 258                 c->total_time += (end-start);
 259                 p->total_time += (end-start);
 260         }
 261
 262         if (c->start_time == 0 || c->start_time > start)
 263                 c->start_time = start;
 264         if (p->start_time == 0 || p->start_time > start)
 265                 p->start_time = start;
 266 }
 267
 268 #define MAX_CPUS 4096
 269
 270 static u64 cpus_cstate_start_times[MAX_CPUS];
 271 static int cpus_cstate_state[MAX_CPUS];
 272 static u64 cpus_pstate_start_times[MAX_CPUS];
 273 static u64 cpus_pstate_state[MAX_CPUS];
 274
 275 static int process_comm_event(struct perf_tool *tool __maybe_unused,
 276                               union perf_event *event,
 277                               struct perf_sample *sample __maybe_unused,
 278                               struct machine *machine __maybe_unused)
 279 {
 280         pid_set_comm(event->comm.tid, event->comm.comm);
 281         return 0;
 282 }
 283
 284 static int process_fork_event(struct perf_tool *tool __maybe_unused,
 285                               union perf_event *event,
 286                               struct perf_sample *sample __maybe_unused,
 287                               struct machine *machine __maybe_unused)
 288 {
 289         pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
 290         return 0;
 291 }
 292
 293 static int process_exit_event(struct perf_tool *tool __maybe_unused,
 294                               union perf_event *event,
 295                               struct perf_sample *sample __maybe_unused,
 296                               struct machine *machine __maybe_unused)
 297 {
 298         pid_exit(event->fork.pid, event->fork.time);
 299         return 0;
 300 }
 301
 302 struct trace_entry {
 303         unsigned short          type;
 304         unsigned char           flags;
 305         unsigned char           preempt_count;
 306         int                     pid;
 307         int                     lock_depth;
 308 };
 309
 310 #ifdef SUPPORT_OLD_POWER_EVENTS
 311 static int use_old_power_events;
 312 struct power_entry_old {
 313         struct trace_entry te;
 314         u64     type;
 315         u64     value;
 316         u64     cpu_id;
 317 };
 318 #endif
 319
 320 struct power_processor_entry {
 321         struct trace_entry te;
 322         u32     state;
 323         u32     cpu_id;
 324 };
 325
 326 #define TASK_COMM_LEN 16
 327 struct wakeup_entry {
 328         struct trace_entry te;
 329         char comm[TASK_COMM_LEN];
 330         int   pid;
 331         int   prio;
 332         int   success;
 333 };
 334
 335 struct sched_switch {
 336         struct trace_entry te;
 337         char prev_comm[TASK_COMM_LEN];
 338         int  prev_pid;
 339         int  prev_prio;
 340         long prev_state; /* Arjan weeps. */
 341         char next_comm[TASK_COMM_LEN];
 342         int  next_pid;
 343         int  next_prio;
 344 };
 345
 346 static void c_state_start(int cpu, u64 timestamp, int state)
 347 {
 348         cpus_cstate_start_times[cpu] = timestamp;
 349         cpus_cstate_state[cpu] = state;
 350 }
 351
 352 static void c_state_end(int cpu, u64 timestamp)
 353 {
 354         struct power_event *pwr = zalloc(sizeof(*pwr));
 355
 356         if (!pwr)
 357                 return;
 358
 359         pwr->state = cpus_cstate_state[cpu];
 360         pwr->start_time = cpus_cstate_start_times[cpu];
 361         pwr->end_time = timestamp;
 362         pwr->cpu = cpu;
 363         pwr->type = CSTATE;
 364         pwr->next = power_events;
 365
 366         power_events = pwr;
 367 }
 368
 369 static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 370 {
 371         struct power_event *pwr;
 372
 373         if (new_freq > 8000000) /* detect invalid data */
 374                 return;
 375
 376         pwr = zalloc(sizeof(*pwr));
 377         if (!pwr)
 378                 return;
 379
 380         pwr->state = cpus_pstate_state[cpu];
 381         pwr->start_time = cpus_pstate_start_times[cpu];
 382         pwr->end_time = timestamp;
 383         pwr->cpu = cpu;
 384         pwr->type = PSTATE;
 385         pwr->next = power_events;
 386
 387         if (!pwr->start_time)
 388                 pwr->start_time = first_time;
 389
 390         power_events = pwr;
 391
 392         cpus_pstate_state[cpu] = new_freq;
 393         cpus_pstate_start_times[cpu] = timestamp;
 394
 395         if ((u64)new_freq > max_freq)
 396                 max_freq = new_freq;
 397
 398         if (new_freq < min_freq || min_freq == 0)
 399                 min_freq = new_freq;
 400
 401         if (new_freq == max_freq - 1000)
 402                         turbo_frequency = max_freq;
 403 }
 404
 405 static void
 406 sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
 407 {
 408         struct per_pid *p;
 409         struct wakeup_entry *wake = (void *)te;
 410         struct wake_event *we = zalloc(sizeof(*we));
 411
 412         if (!we)
 413                 return;
 414
 415         we->time = timestamp;
 416         we->waker = pid;
 417
 418         if ((te->flags & TRACE_FLAG_HARDIRQ) || (te->flags & TRACE_FLAG_SOFTIRQ))
 419                 we->waker = -1;
 420
 421         we->wakee = wake->pid;
 422         we->next = wake_events;
 423         wake_events = we;
 424         p = find_create_pid(we->wakee);
 425
 426         if (p && p->current && p->current->state == TYPE_NONE) {
 427                 p->current->state_since = timestamp;
 428                 p->current->state = TYPE_WAITING;
 429         }
 430         if (p && p->current && p->current->state == TYPE_BLOCKED) {
 431                 pid_put_sample(p->pid, p->current->state, cpu, p->current->state_since, timestamp);
 432                 p->current->state_since = timestamp;
 433                 p->current->state = TYPE_WAITING;
 434         }
 435 }
 436
 437 static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
 438 {
 439         struct per_pid *p = NULL, *prev_p;
 440         struct sched_switch *sw = (void *)te;
 441
 442
 443         prev_p = find_create_pid(sw->prev_pid);
 444
 445         p = find_create_pid(sw->next_pid);
 446
 447         if (prev_p->current && prev_p->current->state != TYPE_NONE)
 448                 pid_put_sample(sw->prev_pid, TYPE_RUNNING, cpu, prev_p->current->state_since, timestamp);
 449         if (p && p->current) {
 450                 if (p->current->state != TYPE_NONE)
 451                         pid_put_sample(sw->next_pid, p->current->state, cpu, p->current->state_since, timestamp);
 452
 453                 p->current->state_since = timestamp;
 454                 p->current->state = TYPE_RUNNING;
 455         }
 456
 457         if (prev_p->current) {
 458                 prev_p->current->state = TYPE_NONE;
 459                 prev_p->current->state_since = timestamp;
 460                 if (sw->prev_state & 2)
 461                         prev_p->current->state = TYPE_BLOCKED;
 462                 if (sw->prev_state == 0)
 463                         prev_p->current->state = TYPE_WAITING;
 464         }
 465 }
 466
 467 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
 468                                   struct perf_sample *sample);
 469
 470 static int process_sample_event(struct perf_tool *tool __maybe_unused,
 471                                 union perf_event *event __maybe_unused,
 472                                 struct perf_sample *sample,
 473                                 struct perf_evsel *evsel,
 474                                 struct machine *machine __maybe_unused)
 475 {
 476         if (evsel->attr.sample_type & PERF_SAMPLE_TIME) {
 477                 if (!first_time || first_time > sample->time)
 478                         first_time = sample->time;
 479                 if (last_time < sample->time)
 480                         last_time = sample->time;
 481         }
 482
 483         if (sample->cpu > numcpus)
 484                 numcpus = sample->cpu;
 485
 486         if (evsel->handler != NULL) {
 487                 tracepoint_handler f = evsel->handler;
 488                 return f(evsel, sample);
 489         }
 490
 491         return 0;
 492 }
 493
 494 static int
 495 process_sample_cpu_idle(struct perf_evsel *evsel __maybe_unused,
 496                         struct perf_sample *sample)
 497 {
 498         struct power_processor_entry *ppe = sample->raw_data;
 499
 500         if (ppe->state == (u32) PWR_EVENT_EXIT)
 501                 c_state_end(ppe->cpu_id, sample->time);
 502         else
 503                 c_state_start(ppe->cpu_id, sample->time, ppe->state);
 504         return 0;
 505 }
 506
 507 static int
 508 process_sample_cpu_frequency(struct perf_evsel *evsel __maybe_unused,
 509                              struct perf_sample *sample)
 510 {
 511         struct power_processor_entry *ppe = sample->raw_data;
 512
 513         p_state_change(ppe->cpu_id, sample->time, ppe->state);
 514         return 0;
 515 }
 516
 517 static int
 518 process_sample_sched_wakeup(struct perf_evsel *evsel __maybe_unused,
 519                             struct perf_sample *sample)
 520 {
 521         struct trace_entry *te = sample->raw_data;
 522
 523         sched_wakeup(sample->cpu, sample->time, sample->pid, te);
 524         return 0;
 525 }
 526
 527 static int
 528 process_sample_sched_switch(struct perf_evsel *evsel __maybe_unused,
 529                             struct perf_sample *sample)
 530 {
 531         struct trace_entry *te = sample->raw_data;
 532
 533         sched_switch(sample->cpu, sample->time, te);
 534         return 0;
 535 }
 536
 537 #ifdef SUPPORT_OLD_POWER_EVENTS
 538 static int
 539 process_sample_power_start(struct perf_evsel *evsel __maybe_unused,
 540                            struct perf_sample *sample)
 541 {
 542         struct power_entry_old *peo = sample->raw_data;
 543
 544         c_state_start(peo->cpu_id, sample->time, peo->value);
 545         return 0;
 546 }
 547
 548 static int
 549 process_sample_power_end(struct perf_evsel *evsel __maybe_unused,
 550                          struct perf_sample *sample)
 551 {
 552         c_state_end(sample->cpu, sample->time);
 553         return 0;
 554 }
 555
 556 static int
 557 process_sample_power_frequency(struct perf_evsel *evsel __maybe_unused,
 558                                struct perf_sample *sample)
 559 {
 560         struct power_entry_old *peo = sample->raw_data;
 561
 562         p_state_change(peo->cpu_id, sample->time, peo->value);
 563         return 0;
 564 }
 565 #endif /* SUPPORT_OLD_POWER_EVENTS */
 566
 567 /*
 568  * After the last sample we need to wrap up the current C/P state
 569  * and close out each CPU for these.
 570  */
 571 static void end_sample_processing(void)
 572 {
 573         u64 cpu;
 574         struct power_event *pwr;
 575
 576         for (cpu = 0; cpu <= numcpus; cpu++) {
 577                 /* C state */
 578 #if 0
 579                 pwr = zalloc(sizeof(*pwr));
 580                 if (!pwr)
 581                         return;
 582
 583                 pwr->state = cpus_cstate_state[cpu];
 584                 pwr->start_time = cpus_cstate_start_times[cpu];
 585                 pwr->end_time = last_time;
 586                 pwr->cpu = cpu;
 587                 pwr->type = CSTATE;
 588                 pwr->next = power_events;
 589
 590                 power_events = pwr;
 591 #endif
 592                 /* P state */
 593
 594                 pwr = zalloc(sizeof(*pwr));
 595                 if (!pwr)
 596                         return;
 597
 598                 pwr->state = cpus_pstate_state[cpu];
 599                 pwr->start_time = cpus_pstate_start_times[cpu];
 600                 pwr->end_time = last_time;
 601                 pwr->cpu = cpu;
 602                 pwr->type = PSTATE;
 603                 pwr->next = power_events;
 604
 605                 if (!pwr->start_time)
 606                         pwr->start_time = first_time;
 607                 if (!pwr->state)
 608                         pwr->state = min_freq;
 609                 power_events = pwr;
 610         }
 611 }
 612
 613 /*
 614  * Sort the pid datastructure
 615  */
 616 static void sort_pids(void)
 617 {
 618         struct per_pid *new_list, *p, *cursor, *prev;
 619         /* sort by ppid first, then by pid, lowest to highest */
 620
 621         new_list = NULL;
 622
 623         while (all_data) {
 624                 p = all_data;
 625                 all_data = p->next;
 626                 p->next = NULL;
 627
 628                 if (new_list == NULL) {
 629                         new_list = p;
 630                         p->next = NULL;
 631                         continue;
 632                 }
 633                 prev = NULL;
 634                 cursor = new_list;
 635                 while (cursor) {
 636                         if (cursor->ppid > p->ppid ||
 637                                 (cursor->ppid == p->ppid && cursor->pid > p->pid)) {
 638                                 /* must insert before */
 639                                 if (prev) {
 640                                         p->next = prev->next;
 641                                         prev->next = p;
 642                                         cursor = NULL;
 643                                         continue;
 644                                 } else {
 645                                         p->next = new_list;
 646                                         new_list = p;
 647                                         cursor = NULL;
 648                                         continue;
 649                                 }
 650                         }
 651
 652                         prev = cursor;
 653                         cursor = cursor->next;
 654                         if (!cursor)
 655                                 prev->next = p;
 656                 }
 657         }
 658         all_data = new_list;
 659 }
 660
 661
 662 static void draw_c_p_states(void)
 663 {
 664         struct power_event *pwr;
 665         pwr = power_events;
 666
 667         /*
 668          * two pass drawing so that the P state bars are on top of the C state blocks
 669          */
 670         while (pwr) {
 671                 if (pwr->type == CSTATE)
 672                         svg_cstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 673                 pwr = pwr->next;
 674         }
 675
 676         pwr = power_events;
 677         while (pwr) {
 678                 if (pwr->type == PSTATE) {
 679                         if (!pwr->state)
 680                                 pwr->state = min_freq;
 681                         svg_pstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 682                 }
 683                 pwr = pwr->next;
 684         }
 685 }
 686
 687 static void draw_wakeups(void)
 688 {
 689         struct wake_event *we;
 690         struct per_pid *p;
 691         struct per_pidcomm *c;
 692
 693         we = wake_events;
 694         while (we) {
 695                 int from = 0, to = 0;
 696                 char *task_from = NULL, *task_to = NULL;
 697
 698                 /* locate the column of the waker and wakee */
 699                 p = all_data;
 700                 while (p) {
 701                         if (p->pid == we->waker || p->pid == we->wakee) {
 702                                 c = p->all;
 703                                 while (c) {
 704                                         if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
 705                                                 if (p->pid == we->waker && !from) {
 706                                                         from = c->Y;
 707                                                         task_from = strdup(c->comm);
 708                                                 }
 709                                                 if (p->pid == we->wakee && !to) {
 710                                                         to = c->Y;
 711                                                         task_to = strdup(c->comm);
 712                                                 }
 713                                         }
 714                                         c = c->next;
 715                                 }
 716                                 c = p->all;
 717                                 while (c) {
 718                                         if (p->pid == we->waker && !from) {
 719                                                 from = c->Y;
 720                                                 task_from = strdup(c->comm);
 721                                         }
 722                                         if (p->pid == we->wakee && !to) {
 723                                                 to = c->Y;
 724                                                 task_to = strdup(c->comm);
 725                                         }
 726                                         c = c->next;
 727                                 }
 728                         }
 729                         p = p->next;
 730                 }
 731
 732                 if (!task_from) {
 733                         task_from = malloc(40);
 734                         sprintf(task_from, "[%i]", we->waker);
 735                 }
 736                 if (!task_to) {
 737                         task_to = malloc(40);
 738                         sprintf(task_to, "[%i]", we->wakee);
 739                 }
 740
 741                 if (we->waker == -1)
 742                         svg_interrupt(we->time, to);
 743                 else if (from && to && abs(from - to) == 1)
 744                         svg_wakeline(we->time, from, to);
 745                 else
 746                         svg_partial_wakeline(we->time, from, task_from, to, task_to);
 747                 we = we->next;
 748
 749                 free(task_from);
 750                 free(task_to);
 751         }
 752 }
 753
 754 static void draw_cpu_usage(void)
 755 {
 756         struct per_pid *p;
 757         struct per_pidcomm *c;
 758         struct cpu_sample *sample;
 759         p = all_data;
 760         while (p) {
 761                 c = p->all;
 762                 while (c) {
 763                         sample = c->samples;
 764                         while (sample) {
 765                                 if (sample->type == TYPE_RUNNING)
 766                                         svg_process(sample->cpu, sample->start_time, sample->end_time, "sample", c->comm);
 767
 768                                 sample = sample->next;
 769                         }
 770                         c = c->next;
 771                 }
 772                 p = p->next;
 773         }
 774 }
 775
 776 static void draw_process_bars(void)
 777 {
 778         struct per_pid *p;
 779         struct per_pidcomm *c;
 780         struct cpu_sample *sample;
 781         int Y = 0;
 782
 783         Y = 2 * numcpus + 2;
 784
 785         p = all_data;
 786         while (p) {
 787                 c = p->all;
 788                 while (c) {
 789                         if (!c->display) {
 790                                 c->Y = 0;
 791                                 c = c->next;
 792                                 continue;
 793                         }
 794
 795                         svg_box(Y, c->start_time, c->end_time, "process");
 796                         sample = c->samples;
 797                         while (sample) {
 798                                 if (sample->type == TYPE_RUNNING)
 799                                         svg_sample(Y, sample->cpu, sample->start_time, sample->end_time);
 800                                 if (sample->type == TYPE_BLOCKED)
 801                                         svg_box(Y, sample->start_time, sample->end_time, "blocked");
 802                                 if (sample->type == TYPE_WAITING)
 803                                         svg_waiting(Y, sample->start_time, sample->end_time);
 804                                 sample = sample->next;
 805                         }
 806
 807                         if (c->comm) {
 808                                 char comm[256];
 809                                 if (c->total_time > 5000000000) /* 5 seconds */
 810                                         sprintf(comm, "%s:%i (%2.2fs)", c->comm, p->pid, c->total_time / 1000000000.0);
 811                                 else
 812                                         sprintf(comm, "%s:%i (%3.1fms)", c->comm, p->pid, c->total_time / 1000000.0);
 813
 814                                 svg_text(Y, c->start_time, comm);
 815                         }
 816                         c->Y = Y;
 817                         Y++;
 818                         c = c->next;
 819                 }
 820                 p = p->next;
 821         }
 822 }
 823
 824 static void add_process_filter(const char *string)
 825 {
 826         int pid = strtoull(string, NULL, 10);
 827         struct process_filter *filt = malloc(sizeof(*filt));
 828
 829         if (!filt)
 830                 return;
 831
 832         filt->name = strdup(string);
 833         filt->pid  = pid;
 834         filt->next = process_filter;
 835
 836         process_filter = filt;
 837 }
 838
 839 static int passes_filter(struct per_pid *p, struct per_pidcomm *c)
 840 {
 841         struct process_filter *filt;
 842         if (!process_filter)
 843                 return 1;
 844
 845         filt = process_filter;
 846         while (filt) {
 847                 if (filt->pid && p->pid == filt->pid)
 848                         return 1;
 849                 if (strcmp(filt->name, c->comm) == 0)
 850                         return 1;
 851                 filt = filt->next;
 852         }
 853         return 0;
 854 }
 855
 856 static int determine_display_tasks_filtered(void)
 857 {
 858         struct per_pid *p;
 859         struct per_pidcomm *c;
 860         int count = 0;
 861
 862         p = all_data;
 863         while (p) {
 864                 p->display = 0;
 865                 if (p->start_time == 1)
 866                         p->start_time = first_time;
 867
 868                 /* no exit marker, task kept running to the end */
 869                 if (p->end_time == 0)
 870                         p->end_time = last_time;
 871
 872                 c = p->all;
 873
 874                 while (c) {
 875                         c->display = 0;
 876
 877                         if (c->start_time == 1)
 878                                 c->start_time = first_time;
 879
 880                         if (passes_filter(p, c)) {
 881                                 c->display = 1;
 882                                 p->display = 1;
 883                                 count++;
 884                         }
 885
 886                         if (c->end_time == 0)
 887                                 c->end_time = last_time;
 888
 889                         c = c->next;
 890                 }
 891                 p = p->next;
 892         }
 893         return count;
 894 }
 895
 896 static int determine_display_tasks(u64 threshold)
 897 {
 898         struct per_pid *p;
 899         struct per_pidcomm *c;
 900         int count = 0;
 901
 902         if (process_filter)
 903                 return determine_display_tasks_filtered();
 904
 905         p = all_data;
 906         while (p) {
 907                 p->display = 0;
 908                 if (p->start_time == 1)
 909                         p->start_time = first_time;
 910
 911                 /* no exit marker, task kept running to the end */
 912                 if (p->end_time == 0)
 913                         p->end_time = last_time;
 914                 if (p->total_time >= threshold && !power_only)
 915                         p->display = 1;
 916
 917                 c = p->all;
 918
 919                 while (c) {
 920                         c->display = 0;
 921
 922                         if (c->start_time == 1)
 923                                 c->start_time = first_time;
 924
 925                         if (c->total_time >= threshold && !power_only) {
 926                                 c->display = 1;
 927                                 count++;
 928                         }
 929
 930                         if (c->end_time == 0)
 931                                 c->end_time = last_time;
 932
 933                         c = c->next;
 934                 }
 935                 p = p->next;
 936         }
 937         return count;
 938 }
 939
 940
 941
 942 #define TIME_THRESH 10000000
 943
 944 static void write_svg_file(const char *filename)
 945 {
 946         u64 i;
 947         int count;
 948
 949         numcpus++;
 950
 951
 952         count = determine_display_tasks(TIME_THRESH);
 953
 954         /* We'd like to show at least 15 tasks; be less picky if we have fewer */
 955         if (count < 15)
 956                 count = determine_display_tasks(TIME_THRESH / 10);
 957
 958         open_svg(filename, numcpus, count, first_time, last_time);
 959
 960         svg_time_grid();
 961         svg_legenda();
 962
 963         for (i = 0; i < numcpus; i++)
 964                 svg_cpu_box(i, max_freq, turbo_frequency);
 965
 966         draw_cpu_usage();
 967         draw_process_bars();
 968         draw_c_p_states();
 969         draw_wakeups();
 970
 971         svg_close();
 972 }
 973
 974 static int __cmd_timechart(const char *output_name)
 975 {
 976         struct perf_tool perf_timechart = {
 977                 .comm            = process_comm_event,
 978                 .fork            = process_fork_event,
 979                 .exit            = process_exit_event,
 980                 .sample          = process_sample_event,
 981                 .ordered_samples = true,
 982         };
 983         const struct perf_evsel_str_handler power_tracepoints[] = {
 984                 { "power:cpu_idle",             process_sample_cpu_idle },
 985                 { "power:cpu_frequency",        process_sample_cpu_frequency },
 986                 { "sched:sched_wakeup",         process_sample_sched_wakeup },
 987                 { "sched:sched_switch",         process_sample_sched_switch },
 988 #ifdef SUPPORT_OLD_POWER_EVENTS
 989                 { "power:power_start",          process_sample_power_start },
 990                 { "power:power_end",            process_sample_power_end },
 991                 { "power:power_frequency",      process_sample_power_frequency },
 992 #endif
 993         };
 994         struct perf_data_file file = {
 995                 .path = input_name,
 996                 .mode = PERF_DATA_MODE_READ,
 997         };
 998
 999         struct perf_session *session = perf_session__new(&file, false,
1000                                                          &perf_timechart);
1001         int ret = -EINVAL;
1002
1003         if (session == NULL)
1004                 return -ENOMEM;
1005
1006         if (!perf_session__has_traces(session, "timechart record"))
1007                 goto out_delete;
1008
1009         if (perf_session__set_tracepoints_handlers(session,
1010                                                    power_tracepoints)) {
1011                 pr_err("Initializing session tracepoint handlers failed\n");
1012                 goto out_delete;
1013         }
1014
1015         ret = perf_session__process_events(session, &perf_timechart);
1016         if (ret)
1017                 goto out_delete;
1018
1019         end_sample_processing();
1020
1021         sort_pids();
1022
1023         write_svg_file(output_name);
1024
1025         pr_info("Written %2.1f seconds of trace to %s.\n",
1026                 (last_time - first_time) / 1000000000.0, output_name);
1027 out_delete:
1028         perf_session__delete(session);
1029         return ret;
1030 }
1031
1032 static int __cmd_record(int argc, const char **argv)
1033 {
1034 #ifdef SUPPORT_OLD_POWER_EVENTS
1035         const char * const record_old_args[] = {
1036                 "record", "-a", "-R", "-c", "1",
1037                 "-e", "power:power_start",
1038                 "-e", "power:power_end",
1039                 "-e", "power:power_frequency",
1040                 "-e", "sched:sched_wakeup",
1041                 "-e", "sched:sched_switch",
1042         };
1043 #endif
1044         const char * const record_new_args[] = {
1045                 "record", "-a", "-R", "-c", "1",
1046                 "-e", "power:cpu_frequency",
1047                 "-e", "power:cpu_idle",
1048                 "-e", "sched:sched_wakeup",
1049                 "-e", "sched:sched_switch",
1050         };
1051         unsigned int rec_argc, i, j;
1052         const char **rec_argv;
1053         const char * const *record_args = record_new_args;
1054         unsigned int record_elems = ARRAY_SIZE(record_new_args);
1055
1056 #ifdef SUPPORT_OLD_POWER_EVENTS
1057         if (!is_valid_tracepoint("power:cpu_idle") &&
1058             is_valid_tracepoint("power:power_start")) {
1059                 use_old_power_events = 1;
1060                 record_args = record_old_args;
1061                 record_elems = ARRAY_SIZE(record_old_args);
1062         }
1063 #endif
1064
1065         rec_argc = record_elems + argc - 1;
1066         rec_argv = calloc(rec_argc + 1, sizeof(char *));
1067
1068         if (rec_argv == NULL)
1069                 return -ENOMEM;
1070
1071         for (i = 0; i < record_elems; i++)
1072                 rec_argv[i] = strdup(record_args[i]);
1073
1074         for (j = 1; j < (unsigned int)argc; j++, i++)
1075                 rec_argv[i] = argv[j];
1076
1077         return cmd_record(i, rec_argv, NULL);
1078 }
1079
1080 static int
1081 parse_process(const struct option *opt __maybe_unused, const char *arg,
1082               int __maybe_unused unset)
1083 {
1084         if (arg)
1085                 add_process_filter(arg);
1086         return 0;
1087 }
1088
1089 int cmd_timechart(int argc, const char **argv,
1090                   const char *prefix __maybe_unused)
1091 {
1092         const char *output_name = "output.svg";
1093         const struct option options[] = {
1094         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1095         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1096         OPT_INTEGER('w', "width", &svg_page_width, "page width"),
1097         OPT_BOOLEAN('P', "power-only", &power_only, "output power data only"),
1098         OPT_CALLBACK('p', "process", NULL, "process",
1099                       "process selector. Pass a pid or process name.",
1100                        parse_process),
1101         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1102                     "Look for files with symbols relative to this directory"),
1103         OPT_END()
1104         };
1105         const char * const timechart_usage[] = {
1106                 "perf timechart [<options>] {record}",
1107                 NULL
1108         };
1109
1110         argc = parse_options(argc, argv, options, timechart_usage,
1111                         PARSE_OPT_STOP_AT_NON_OPTION);
1112
1113         symbol__init();
1114
1115         if (argc && !strncmp(argv[0], "rec", 3))
1116                 return __cmd_record(argc, argv);
1117         else if (argc)
1118                 usage_with_options(timechart_usage, options);
1119
1120         setup_pager();
1121
1122         return __cmd_timechart(output_name);
1123 }