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 "builtin.h"
  16
  17 #include "util/util.h"
  18
  19 #include "util/color.h"
  20 #include <linux/list.h>
  21 #include "util/cache.h"
  22 #include "util/evsel.h"
  23 #include <linux/rbtree.h>
  24 #include "util/symbol.h"
  25 #include "util/callchain.h"
  26 #include "util/strlist.h"
  27
  28 #include "perf.h"
  29 #include "util/header.h"
  30 #include "util/parse-options.h"
  31 #include "util/parse-events.h"
  32 #include "util/event.h"
  33 #include "util/session.h"
  34 #include "util/svghelper.h"
  35
  36 #define SUPPORT_OLD_POWER_EVENTS 1
  37 #define PWR_EVENT_EXIT -1
  38
  39
  40 static char             const *input_name = "perf.data";
  41 static char             const *output_name = "output.svg";
  42
  43 static unsigned int     numcpus;
  44 static u64              min_freq;       /* Lowest CPU frequency seen */
  45 static u64              max_freq;       /* Highest CPU frequency seen */
  46 static u64              turbo_frequency;
  47
  48 static u64              first_time, last_time;
  49
  50 static bool             power_only;
  51
  52
  53 struct per_pid;
  54 struct per_pidcomm;
  55
  56 struct cpu_sample;
  57 struct power_event;
  58 struct wake_event;
  59
  60 struct sample_wrapper;
  61
  62 /*
  63  * Datastructure layout:
  64  * We keep an list of "pid"s, matching the kernels notion of a task struct.
  65  * Each "pid" entry, has a list of "comm"s.
  66  *      this is because we want to track different programs different, while
  67  *      exec will reuse the original pid (by design).
  68  * Each comm has a list of samples that will be used to draw
  69  * final graph.
  70  */
  71
  72 struct per_pid {
  73         struct per_pid *next;
  74
  75         int             pid;
  76         int             ppid;
  77
  78         u64             start_time;
  79         u64             end_time;
  80         u64             total_time;
  81         int             display;
  82
  83         struct per_pidcomm *all;
  84         struct per_pidcomm *current;
  85 };
  86
  87
  88 struct per_pidcomm {
  89         struct per_pidcomm *next;
  90
  91         u64             start_time;
  92         u64             end_time;
  93         u64             total_time;
  94
  95         int             Y;
  96         int             display;
  97
  98         long            state;
  99         u64             state_since;
 100
 101         char            *comm;
 102
 103         struct cpu_sample *samples;
 104 };
 105
 106 struct sample_wrapper {
 107         struct sample_wrapper *next;
 108
 109         u64             timestamp;
 110         unsigned char   data[0];
 111 };
 112
 113 #define TYPE_NONE       0
 114 #define TYPE_RUNNING    1
 115 #define TYPE_WAITING    2
 116 #define TYPE_BLOCKED    3
 117
 118 struct cpu_sample {
 119         struct cpu_sample *next;
 120
 121         u64 start_time;
 122         u64 end_time;
 123         int type;
 124         int cpu;
 125 };
 126
 127 static struct per_pid *all_data;
 128
 129 #define CSTATE 1
 130 #define PSTATE 2
 131
 132 struct power_event {
 133         struct power_event *next;
 134         int type;
 135         int state;
 136         u64 start_time;
 137         u64 end_time;
 138         int cpu;
 139 };
 140
 141 struct wake_event {
 142         struct wake_event *next;
 143         int waker;
 144         int wakee;
 145         u64 time;
 146 };
 147
 148 static struct power_event    *power_events;
 149 static struct wake_event     *wake_events;
 150
 151 struct process_filter;
 152 struct process_filter {
 153         char                    *name;
 154         int                     pid;
 155         struct process_filter   *next;
 156 };
 157
 158 static struct process_filter *process_filter;
 159
 160
 161 static struct per_pid *find_create_pid(int pid)
 162 {
 163         struct per_pid *cursor = all_data;
 164
 165         while (cursor) {
 166                 if (cursor->pid == pid)
 167                         return cursor;
 168                 cursor = cursor->next;
 169         }
 170         cursor = malloc(sizeof(struct per_pid));
 171         assert(cursor != NULL);
 172         memset(cursor, 0, sizeof(struct per_pid));
 173         cursor->pid = pid;
 174         cursor->next = all_data;
 175         all_data = cursor;
 176         return cursor;
 177 }
 178
 179 static void pid_set_comm(int pid, char *comm)
 180 {
 181         struct per_pid *p;
 182         struct per_pidcomm *c;
 183         p = find_create_pid(pid);
 184         c = p->all;
 185         while (c) {
 186                 if (c->comm && strcmp(c->comm, comm) == 0) {
 187                         p->current = c;
 188                         return;
 189                 }
 190                 if (!c->comm) {
 191                         c->comm = strdup(comm);
 192                         p->current = c;
 193                         return;
 194                 }
 195                 c = c->next;
 196         }
 197         c = malloc(sizeof(struct per_pidcomm));
 198         assert(c != NULL);
 199         memset(c, 0, sizeof(struct per_pidcomm));
 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 = malloc(sizeof(struct per_pidcomm));
 242                 assert(c != NULL);
 243                 memset(c, 0, sizeof(struct per_pidcomm));
 244                 p->current = c;
 245                 c->next = p->all;
 246                 p->all = c;
 247         }
 248
 249         sample = malloc(sizeof(struct cpu_sample));
 250         assert(sample != NULL);
 251         memset(sample, 0, sizeof(struct cpu_sample));
 252         sample->start_time = start;
 253         sample->end_time = end;
 254         sample->type = type;
 255         sample->next = c->samples;
 256         sample->cpu = cpu;
 257         c->samples = sample;
 258
 259         if (sample->type == TYPE_RUNNING && end > start && start > 0) {
 260                 c->total_time += (end-start);
 261                 p->total_time += (end-start);
 262         }
 263
 264         if (c->start_time == 0 || c->start_time > start)
 265                 c->start_time = start;
 266         if (p->start_time == 0 || p->start_time > start)
 267                 p->start_time = start;
 268 }
 269
 270 #define MAX_CPUS 4096
 271
 272 static u64 cpus_cstate_start_times[MAX_CPUS];
 273 static int cpus_cstate_state[MAX_CPUS];
 274 static u64 cpus_pstate_start_times[MAX_CPUS];
 275 static u64 cpus_pstate_state[MAX_CPUS];
 276
 277 static int process_comm_event(struct perf_event_ops *ops __used,
 278                               union perf_event *event,
 279                               struct perf_sample *sample __used,
 280                               struct perf_session *session __used)
 281 {
 282         pid_set_comm(event->comm.tid, event->comm.comm);
 283         return 0;
 284 }
 285
 286 static int process_fork_event(struct perf_event_ops *ops __used,
 287                               union perf_event *event,
 288                               struct perf_sample *sample __used,
 289                               struct perf_session *session __used)
 290 {
 291         pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
 292         return 0;
 293 }
 294
 295 static int process_exit_event(struct perf_event_ops *ops __used,
 296                               union perf_event *event,
 297                               struct perf_sample *sample __used,
 298                               struct perf_session *session __used)
 299 {
 300         pid_exit(event->fork.pid, event->fork.time);
 301         return 0;
 302 }
 303
 304 struct trace_entry {
 305         unsigned short          type;
 306         unsigned char           flags;
 307         unsigned char           preempt_count;
 308         int                     pid;
 309         int                     lock_depth;
 310 };
 311
 312 #ifdef SUPPORT_OLD_POWER_EVENTS
 313 static int use_old_power_events;
 314 struct power_entry_old {
 315         struct trace_entry te;
 316         u64     type;
 317         u64     value;
 318         u64     cpu_id;
 319 };
 320 #endif
 321
 322 struct power_processor_entry {
 323         struct trace_entry te;
 324         u32     state;
 325         u32     cpu_id;
 326 };
 327
 328 #define TASK_COMM_LEN 16
 329 struct wakeup_entry {
 330         struct trace_entry te;
 331         char comm[TASK_COMM_LEN];
 332         int   pid;
 333         int   prio;
 334         int   success;
 335 };
 336
 337 /*
 338  * trace_flag_type is an enumeration that holds different
 339  * states when a trace occurs. These are:
 340  *  IRQS_OFF            - interrupts were disabled
 341  *  IRQS_NOSUPPORT      - arch does not support irqs_disabled_flags
 342  *  NEED_RESCED         - reschedule is requested
 343  *  HARDIRQ             - inside an interrupt handler
 344  *  SOFTIRQ             - inside a softirq handler
 345  */
 346 enum trace_flag_type {
 347         TRACE_FLAG_IRQS_OFF             = 0x01,
 348         TRACE_FLAG_IRQS_NOSUPPORT       = 0x02,
 349         TRACE_FLAG_NEED_RESCHED         = 0x04,
 350         TRACE_FLAG_HARDIRQ              = 0x08,
 351         TRACE_FLAG_SOFTIRQ              = 0x10,
 352 };
 353
 354
 355
 356 struct sched_switch {
 357         struct trace_entry te;
 358         char prev_comm[TASK_COMM_LEN];
 359         int  prev_pid;
 360         int  prev_prio;
 361         long prev_state; /* Arjan weeps. */
 362         char next_comm[TASK_COMM_LEN];
 363         int  next_pid;
 364         int  next_prio;
 365 };
 366
 367 static void c_state_start(int cpu, u64 timestamp, int state)
 368 {
 369         cpus_cstate_start_times[cpu] = timestamp;
 370         cpus_cstate_state[cpu] = state;
 371 }
 372
 373 static void c_state_end(int cpu, u64 timestamp)
 374 {
 375         struct power_event *pwr;
 376         pwr = malloc(sizeof(struct power_event));
 377         if (!pwr)
 378                 return;
 379         memset(pwr, 0, sizeof(struct power_event));
 380
 381         pwr->state = cpus_cstate_state[cpu];
 382         pwr->start_time = cpus_cstate_start_times[cpu];
 383         pwr->end_time = timestamp;
 384         pwr->cpu = cpu;
 385         pwr->type = CSTATE;
 386         pwr->next = power_events;
 387
 388         power_events = pwr;
 389 }
 390
 391 static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 392 {
 393         struct power_event *pwr;
 394         pwr = malloc(sizeof(struct power_event));
 395
 396         if (new_freq > 8000000) /* detect invalid data */
 397                 return;
 398
 399         if (!pwr)
 400                 return;
 401         memset(pwr, 0, sizeof(struct power_event));
 402
 403         pwr->state = cpus_pstate_state[cpu];
 404         pwr->start_time = cpus_pstate_start_times[cpu];
 405         pwr->end_time = timestamp;
 406         pwr->cpu = cpu;
 407         pwr->type = PSTATE;
 408         pwr->next = power_events;
 409
 410         if (!pwr->start_time)
 411                 pwr->start_time = first_time;
 412
 413         power_events = pwr;
 414
 415         cpus_pstate_state[cpu] = new_freq;
 416         cpus_pstate_start_times[cpu] = timestamp;
 417
 418         if ((u64)new_freq > max_freq)
 419                 max_freq = new_freq;
 420
 421         if (new_freq < min_freq || min_freq == 0)
 422                 min_freq = new_freq;
 423
 424         if (new_freq == max_freq - 1000)
 425                         turbo_frequency = max_freq;
 426 }
 427
 428 static void
 429 sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
 430 {
 431         struct wake_event *we;
 432         struct per_pid *p;
 433         struct wakeup_entry *wake = (void *)te;
 434
 435         we = malloc(sizeof(struct wake_event));
 436         if (!we)
 437                 return;
 438
 439         memset(we, 0, sizeof(struct wake_event));
 440         we->time = timestamp;
 441         we->waker = pid;
 442
 443         if ((te->flags & TRACE_FLAG_HARDIRQ) || (te->flags & TRACE_FLAG_SOFTIRQ))
 444                 we->waker = -1;
 445
 446         we->wakee = wake->pid;
 447         we->next = wake_events;
 448         wake_events = we;
 449         p = find_create_pid(we->wakee);
 450
 451         if (p && p->current && p->current->state == TYPE_NONE) {
 452                 p->current->state_since = timestamp;
 453                 p->current->state = TYPE_WAITING;
 454         }
 455         if (p && p->current && p->current->state == TYPE_BLOCKED) {
 456                 pid_put_sample(p->pid, p->current->state, cpu, p->current->state_since, timestamp);
 457                 p->current->state_since = timestamp;
 458                 p->current->state = TYPE_WAITING;
 459         }
 460 }
 461
 462 static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
 463 {
 464         struct per_pid *p = NULL, *prev_p;
 465         struct sched_switch *sw = (void *)te;
 466
 467
 468         prev_p = find_create_pid(sw->prev_pid);
 469
 470         p = find_create_pid(sw->next_pid);
 471
 472         if (prev_p->current && prev_p->current->state != TYPE_NONE)
 473                 pid_put_sample(sw->prev_pid, TYPE_RUNNING, cpu, prev_p->current->state_since, timestamp);
 474         if (p && p->current) {
 475                 if (p->current->state != TYPE_NONE)
 476                         pid_put_sample(sw->next_pid, p->current->state, cpu, p->current->state_since, timestamp);
 477
 478                 p->current->state_since = timestamp;
 479                 p->current->state = TYPE_RUNNING;
 480         }
 481
 482         if (prev_p->current) {
 483                 prev_p->current->state = TYPE_NONE;
 484                 prev_p->current->state_since = timestamp;
 485                 if (sw->prev_state & 2)
 486                         prev_p->current->state = TYPE_BLOCKED;
 487                 if (sw->prev_state == 0)
 488                         prev_p->current->state = TYPE_WAITING;
 489         }
 490 }
 491
 492
 493 static int process_sample_event(struct perf_event_ops *ops __used,
 494                                 union perf_event *event __used,
 495                                 struct perf_sample *sample,
 496                                 struct perf_evsel *evsel,
 497                                 struct perf_session *session __used)
 498 {
 499         struct trace_entry *te;
 500
 501         if (evsel->attr.sample_type & PERF_SAMPLE_TIME) {
 502                 if (!first_time || first_time > sample->time)
 503                         first_time = sample->time;
 504                 if (last_time < sample->time)
 505                         last_time = sample->time;
 506         }
 507
 508         te = (void *)sample->raw_data;
 509         if ((evsel->attr.sample_type & PERF_SAMPLE_RAW) && sample->raw_size > 0) {
 510                 char *event_str;
 511 #ifdef SUPPORT_OLD_POWER_EVENTS
 512                 struct power_entry_old *peo;
 513                 peo = (void *)te;
 514 #endif
 515                 /*
 516                  * FIXME: use evsel, its already mapped from id to perf_evsel,
 517                  * remove perf_header__find_event infrastructure bits.
 518                  * Mapping all these "power:cpu_idle" strings to the tracepoint
 519                  * ID and then just comparing against evsel->attr.config.
 520                  *
 521                  * e.g.:
 522                  *
 523                  * if (evsel->attr.config == power_cpu_idle_id)
 524                  */
 525                 event_str = perf_header__find_event(te->type);
 526
 527                 if (!event_str)
 528                         return 0;
 529
 530                 if (sample->cpu > numcpus)
 531                         numcpus = sample->cpu;
 532
 533                 if (strcmp(event_str, "power:cpu_idle") == 0) {
 534                         struct power_processor_entry *ppe = (void *)te;
 535                         if (ppe->state == (u32)PWR_EVENT_EXIT)
 536                                 c_state_end(ppe->cpu_id, sample->time);
 537                         else
 538                                 c_state_start(ppe->cpu_id, sample->time,
 539                                               ppe->state);
 540                 }
 541                 else if (strcmp(event_str, "power:cpu_frequency") == 0) {
 542                         struct power_processor_entry *ppe = (void *)te;
 543                         p_state_change(ppe->cpu_id, sample->time, ppe->state);
 544                 }
 545
 546                 else if (strcmp(event_str, "sched:sched_wakeup") == 0)
 547                         sched_wakeup(sample->cpu, sample->time, sample->pid, te);
 548
 549                 else if (strcmp(event_str, "sched:sched_switch") == 0)
 550                         sched_switch(sample->cpu, sample->time, te);
 551
 552 #ifdef SUPPORT_OLD_POWER_EVENTS
 553                 if (use_old_power_events) {
 554                         if (strcmp(event_str, "power:power_start") == 0)
 555                                 c_state_start(peo->cpu_id, sample->time,
 556                                               peo->value);
 557
 558                         else if (strcmp(event_str, "power:power_end") == 0)
 559                                 c_state_end(sample->cpu, sample->time);
 560
 561                         else if (strcmp(event_str,
 562                                         "power:power_frequency") == 0)
 563                                 p_state_change(peo->cpu_id, sample->time,
 564                                                peo->value);
 565                 }
 566 #endif
 567         }
 568         return 0;
 569 }
 570
 571 /*
 572  * After the last sample we need to wrap up the current C/P state
 573  * and close out each CPU for these.
 574  */
 575 static void end_sample_processing(void)
 576 {
 577         u64 cpu;
 578         struct power_event *pwr;
 579
 580         for (cpu = 0; cpu <= numcpus; cpu++) {
 581                 pwr = malloc(sizeof(struct power_event));
 582                 if (!pwr)
 583                         return;
 584                 memset(pwr, 0, sizeof(struct power_event));
 585
 586                 /* C state */
 587 #if 0
 588                 pwr->state = cpus_cstate_state[cpu];
 589                 pwr->start_time = cpus_cstate_start_times[cpu];
 590                 pwr->end_time = last_time;
 591                 pwr->cpu = cpu;
 592                 pwr->type = CSTATE;
 593                 pwr->next = power_events;
 594
 595                 power_events = pwr;
 596 #endif
 597                 /* P state */
 598
 599                 pwr = malloc(sizeof(struct power_event));
 600                 if (!pwr)
 601                         return;
 602                 memset(pwr, 0, sizeof(struct power_event));
 603
 604                 pwr->state = cpus_pstate_state[cpu];
 605                 pwr->start_time = cpus_pstate_start_times[cpu];
 606                 pwr->end_time = last_time;
 607                 pwr->cpu = cpu;
 608                 pwr->type = PSTATE;
 609                 pwr->next = power_events;
 610
 611                 if (!pwr->start_time)
 612                         pwr->start_time = first_time;
 613                 if (!pwr->state)
 614                         pwr->state = min_freq;
 615                 power_events = pwr;
 616         }
 617 }
 618
 619 /*
 620  * Sort the pid datastructure
 621  */
 622 static void sort_pids(void)
 623 {
 624         struct per_pid *new_list, *p, *cursor, *prev;
 625         /* sort by ppid first, then by pid, lowest to highest */
 626
 627         new_list = NULL;
 628
 629         while (all_data) {
 630                 p = all_data;
 631                 all_data = p->next;
 632                 p->next = NULL;
 633
 634                 if (new_list == NULL) {
 635                         new_list = p;
 636                         p->next = NULL;
 637                         continue;
 638                 }
 639                 prev = NULL;
 640                 cursor = new_list;
 641                 while (cursor) {
 642                         if (cursor->ppid > p->ppid ||
 643                                 (cursor->ppid == p->ppid && cursor->pid > p->pid)) {
 644                                 /* must insert before */
 645                                 if (prev) {
 646                                         p->next = prev->next;
 647                                         prev->next = p;
 648                                         cursor = NULL;
 649                                         continue;
 650                                 } else {
 651                                         p->next = new_list;
 652                                         new_list = p;
 653                                         cursor = NULL;
 654                                         continue;
 655                                 }
 656                         }
 657
 658                         prev = cursor;
 659                         cursor = cursor->next;
 660                         if (!cursor)
 661                                 prev->next = p;
 662                 }
 663         }
 664         all_data = new_list;
 665 }
 666
 667
 668 static void draw_c_p_states(void)
 669 {
 670         struct power_event *pwr;
 671         pwr = power_events;
 672
 673         /*
 674          * two pass drawing so that the P state bars are on top of the C state blocks
 675          */
 676         while (pwr) {
 677                 if (pwr->type == CSTATE)
 678                         svg_cstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 679                 pwr = pwr->next;
 680         }
 681
 682         pwr = power_events;
 683         while (pwr) {
 684                 if (pwr->type == PSTATE) {
 685                         if (!pwr->state)
 686                                 pwr->state = min_freq;
 687                         svg_pstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 688                 }
 689                 pwr = pwr->next;
 690         }
 691 }
 692
 693 static void draw_wakeups(void)
 694 {
 695         struct wake_event *we;
 696         struct per_pid *p;
 697         struct per_pidcomm *c;
 698
 699         we = wake_events;
 700         while (we) {
 701                 int from = 0, to = 0;
 702                 char *task_from = NULL, *task_to = NULL;
 703
 704                 /* locate the column of the waker and wakee */
 705                 p = all_data;
 706                 while (p) {
 707                         if (p->pid == we->waker || p->pid == we->wakee) {
 708                                 c = p->all;
 709                                 while (c) {
 710                                         if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
 711                                                 if (p->pid == we->waker && !from) {
 712                                                         from = c->Y;
 713                                                         task_from = strdup(c->comm);
 714                                                 }
 715                                                 if (p->pid == we->wakee && !to) {
 716                                                         to = c->Y;
 717                                                         task_to = strdup(c->comm);
 718                                                 }
 719                                         }
 720                                         c = c->next;
 721                                 }
 722                                 c = p->all;
 723                                 while (c) {
 724                                         if (p->pid == we->waker && !from) {
 725                                                 from = c->Y;
 726                                                 task_from = strdup(c->comm);
 727                                         }
 728                                         if (p->pid == we->wakee && !to) {
 729                                                 to = c->Y;
 730                                                 task_to = strdup(c->comm);
 731                                         }
 732                                         c = c->next;
 733                                 }
 734                         }
 735                         p = p->next;
 736                 }
 737
 738                 if (!task_from) {
 739                         task_from = malloc(40);
 740                         sprintf(task_from, "[%i]", we->waker);
 741                 }
 742                 if (!task_to) {
 743                         task_to = malloc(40);
 744                         sprintf(task_to, "[%i]", we->wakee);
 745                 }
 746
 747                 if (we->waker == -1)
 748                         svg_interrupt(we->time, to);
 749                 else if (from && to && abs(from - to) == 1)
 750                         svg_wakeline(we->time, from, to);
 751                 else
 752                         svg_partial_wakeline(we->time, from, task_from, to, task_to);
 753                 we = we->next;
 754
 755                 free(task_from);
 756                 free(task_to);
 757         }
 758 }
 759
 760 static void draw_cpu_usage(void)
 761 {
 762         struct per_pid *p;
 763         struct per_pidcomm *c;
 764         struct cpu_sample *sample;
 765         p = all_data;
 766         while (p) {
 767                 c = p->all;
 768                 while (c) {
 769                         sample = c->samples;
 770                         while (sample) {
 771                                 if (sample->type == TYPE_RUNNING)
 772                                         svg_process(sample->cpu, sample->start_time, sample->end_time, "sample", c->comm);
 773
 774                                 sample = sample->next;
 775                         }
 776                         c = c->next;
 777                 }
 778                 p = p->next;
 779         }
 780 }
 781
 782 static void draw_process_bars(void)
 783 {
 784         struct per_pid *p;
 785         struct per_pidcomm *c;
 786         struct cpu_sample *sample;
 787         int Y = 0;
 788
 789         Y = 2 * numcpus + 2;
 790
 791         p = all_data;
 792         while (p) {
 793                 c = p->all;
 794                 while (c) {
 795                         if (!c->display) {
 796                                 c->Y = 0;
 797                                 c = c->next;
 798                                 continue;
 799                         }
 800
 801                         svg_box(Y, c->start_time, c->end_time, "process");
 802                         sample = c->samples;
 803                         while (sample) {
 804                                 if (sample->type == TYPE_RUNNING)
 805                                         svg_sample(Y, sample->cpu, sample->start_time, sample->end_time);
 806                                 if (sample->type == TYPE_BLOCKED)
 807                                         svg_box(Y, sample->start_time, sample->end_time, "blocked");
 808                                 if (sample->type == TYPE_WAITING)
 809                                         svg_waiting(Y, sample->start_time, sample->end_time);
 810                                 sample = sample->next;
 811                         }
 812
 813                         if (c->comm) {
 814                                 char comm[256];
 815                                 if (c->total_time > 5000000000) /* 5 seconds */
 816                                         sprintf(comm, "%s:%i (%2.2fs)", c->comm, p->pid, c->total_time / 1000000000.0);
 817                                 else
 818                                         sprintf(comm, "%s:%i (%3.1fms)", c->comm, p->pid, c->total_time / 1000000.0);
 819
 820                                 svg_text(Y, c->start_time, comm);
 821                         }
 822                         c->Y = Y;
 823                         Y++;
 824                         c = c->next;
 825                 }
 826                 p = p->next;
 827         }
 828 }
 829
 830 static void add_process_filter(const char *string)
 831 {
 832         struct process_filter *filt;
 833         int pid;
 834
 835         pid = strtoull(string, NULL, 10);
 836         filt = malloc(sizeof(struct process_filter));
 837         if (!filt)
 838                 return;
 839
 840         filt->name = strdup(string);
 841         filt->pid  = pid;
 842         filt->next = process_filter;
 843
 844         process_filter = filt;
 845 }
 846
 847 static int passes_filter(struct per_pid *p, struct per_pidcomm *c)
 848 {
 849         struct process_filter *filt;
 850         if (!process_filter)
 851                 return 1;
 852
 853         filt = process_filter;
 854         while (filt) {
 855                 if (filt->pid && p->pid == filt->pid)
 856                         return 1;
 857                 if (strcmp(filt->name, c->comm) == 0)
 858                         return 1;
 859                 filt = filt->next;
 860         }
 861         return 0;
 862 }
 863
 864 static int determine_display_tasks_filtered(void)
 865 {
 866         struct per_pid *p;
 867         struct per_pidcomm *c;
 868         int count = 0;
 869
 870         p = all_data;
 871         while (p) {
 872                 p->display = 0;
 873                 if (p->start_time == 1)
 874                         p->start_time = first_time;
 875
 876                 /* no exit marker, task kept running to the end */
 877                 if (p->end_time == 0)
 878                         p->end_time = last_time;
 879
 880                 c = p->all;
 881
 882                 while (c) {
 883                         c->display = 0;
 884
 885                         if (c->start_time == 1)
 886                                 c->start_time = first_time;
 887
 888                         if (passes_filter(p, c)) {
 889                                 c->display = 1;
 890                                 p->display = 1;
 891                                 count++;
 892                         }
 893
 894                         if (c->end_time == 0)
 895                                 c->end_time = last_time;
 896
 897                         c = c->next;
 898                 }
 899                 p = p->next;
 900         }
 901         return count;
 902 }
 903
 904 static int determine_display_tasks(u64 threshold)
 905 {
 906         struct per_pid *p;
 907         struct per_pidcomm *c;
 908         int count = 0;
 909
 910         if (process_filter)
 911                 return determine_display_tasks_filtered();
 912
 913         p = all_data;
 914         while (p) {
 915                 p->display = 0;
 916                 if (p->start_time == 1)
 917                         p->start_time = first_time;
 918
 919                 /* no exit marker, task kept running to the end */
 920                 if (p->end_time == 0)
 921                         p->end_time = last_time;
 922                 if (p->total_time >= threshold && !power_only)
 923                         p->display = 1;
 924
 925                 c = p->all;
 926
 927                 while (c) {
 928                         c->display = 0;
 929
 930                         if (c->start_time == 1)
 931                                 c->start_time = first_time;
 932
 933                         if (c->total_time >= threshold && !power_only) {
 934                                 c->display = 1;
 935                                 count++;
 936                         }
 937
 938                         if (c->end_time == 0)
 939                                 c->end_time = last_time;
 940
 941                         c = c->next;
 942                 }
 943                 p = p->next;
 944         }
 945         return count;
 946 }
 947
 948
 949
 950 #define TIME_THRESH 10000000
 951
 952 static void write_svg_file(const char *filename)
 953 {
 954         u64 i;
 955         int count;
 956
 957         numcpus++;
 958
 959
 960         count = determine_display_tasks(TIME_THRESH);
 961
 962         /* We'd like to show at least 15 tasks; be less picky if we have fewer */
 963         if (count < 15)
 964                 count = determine_display_tasks(TIME_THRESH / 10);
 965
 966         open_svg(filename, numcpus, count, first_time, last_time);
 967
 968         svg_time_grid();
 969         svg_legenda();
 970
 971         for (i = 0; i < numcpus; i++)
 972                 svg_cpu_box(i, max_freq, turbo_frequency);
 973
 974         draw_cpu_usage();
 975         draw_process_bars();
 976         draw_c_p_states();
 977         draw_wakeups();
 978
 979         svg_close();
 980 }
 981
 982 static struct perf_event_ops event_ops = {
 983         .comm                   = process_comm_event,
 984         .fork                   = process_fork_event,
 985         .exit                   = process_exit_event,
 986         .sample                 = process_sample_event,
 987         .ordered_samples        = true,
 988 };
 989
 990 static int __cmd_timechart(void)
 991 {
 992         struct perf_session *session = perf_session__new(input_name, O_RDONLY,
 993                                                          0, false, &event_ops);
 994         int ret = -EINVAL;
 995
 996         if (session == NULL)
 997                 return -ENOMEM;
 998
 999         if (!perf_session__has_traces(session, "timechart record"))
1000                 goto out_delete;
1001
1002         ret = perf_session__process_events(session, &event_ops);
1003         if (ret)
1004                 goto out_delete;
1005
1006         end_sample_processing();
1007
1008         sort_pids();
1009
1010         write_svg_file(output_name);
1011
1012         pr_info("Written %2.1f seconds of trace to %s.\n",
1013                 (last_time - first_time) / 1000000000.0, output_name);
1014 out_delete:
1015         perf_session__delete(session);
1016         return ret;
1017 }
1018
1019 static const char * const timechart_usage[] = {
1020         "perf timechart [<options>] {record}",
1021         NULL
1022 };
1023
1024 #ifdef SUPPORT_OLD_POWER_EVENTS
1025 static const char * const record_old_args[] = {
1026         "record",
1027         "-a",
1028         "-R",
1029         "-f",
1030         "-c", "1",
1031         "-e", "power:power_start",
1032         "-e", "power:power_end",
1033         "-e", "power:power_frequency",
1034         "-e", "sched:sched_wakeup",
1035         "-e", "sched:sched_switch",
1036 };
1037 #endif
1038
1039 static const char * const record_new_args[] = {
1040         "record",
1041         "-a",
1042         "-R",
1043         "-f",
1044         "-c", "1",
1045         "-e", "power:cpu_frequency",
1046         "-e", "power:cpu_idle",
1047         "-e", "sched:sched_wakeup",
1048         "-e", "sched:sched_switch",
1049 };
1050
1051 static int __cmd_record(int argc, const char **argv)
1052 {
1053         unsigned int rec_argc, i, j;
1054         const char **rec_argv;
1055         const char * const *record_args = record_new_args;
1056         unsigned int record_elems = ARRAY_SIZE(record_new_args);
1057
1058 #ifdef SUPPORT_OLD_POWER_EVENTS
1059         if (!is_valid_tracepoint("power:cpu_idle") &&
1060             is_valid_tracepoint("power:power_start")) {
1061                 use_old_power_events = 1;
1062                 record_args = record_old_args;
1063                 record_elems = ARRAY_SIZE(record_old_args);
1064         }
1065 #endif
1066
1067         rec_argc = record_elems + argc - 1;
1068         rec_argv = calloc(rec_argc + 1, sizeof(char *));
1069
1070         if (rec_argv == NULL)
1071                 return -ENOMEM;
1072
1073         for (i = 0; i < record_elems; i++)
1074                 rec_argv[i] = strdup(record_args[i]);
1075
1076         for (j = 1; j < (unsigned int)argc; j++, i++)
1077                 rec_argv[i] = argv[j];
1078
1079         return cmd_record(i, rec_argv, NULL);
1080 }
1081
1082 static int
1083 parse_process(const struct option *opt __used, const char *arg, int __used unset)
1084 {
1085         if (arg)
1086                 add_process_filter(arg);
1087         return 0;
1088 }
1089
1090 static const struct option options[] = {
1091         OPT_STRING('i', "input", &input_name, "file",
1092                     "input file name"),
1093         OPT_STRING('o', "output", &output_name, "file",
1094                     "output file name"),
1095         OPT_INTEGER('w', "width", &svg_page_width,
1096                     "page width"),
1097         OPT_BOOLEAN('P', "power-only", &power_only,
1098                     "output power data only"),
1099         OPT_CALLBACK('p', "process", NULL, "process",
1100                       "process selector. Pass a pid or process name.",
1101                        parse_process),
1102         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1103                     "Look for files with symbols relative to this directory"),
1104         OPT_END()
1105 };
1106
1107
1108 int cmd_timechart(int argc, const char **argv, const char *prefix __used)
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();
1123 }