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 #include "util/tool.h"
  36
  37 #define SUPPORT_OLD_POWER_EVENTS 1
  38 #define PWR_EVENT_EXIT -1
  39
  40
  41 static const char       *input_name;
  42 static const char       *output_name = "output.svg";
  43
  44 static unsigned int     numcpus;
  45 static u64              min_freq;       /* Lowest CPU frequency seen */
  46 static u64              max_freq;       /* Highest CPU frequency seen */
  47 static u64              turbo_frequency;
  48
  49 static u64              first_time, last_time;
  50
  51 static bool             power_only;
  52
  53
  54 struct per_pid;
  55 struct per_pidcomm;
  56
  57 struct cpu_sample;
  58 struct power_event;
  59 struct wake_event;
  60
  61 struct sample_wrapper;
  62
  63 /*
  64  * Datastructure layout:
  65  * We keep an list of "pid"s, matching the kernels notion of a task struct.
  66  * Each "pid" entry, has a list of "comm"s.
  67  *      this is because we want to track different programs different, while
  68  *      exec will reuse the original pid (by design).
  69  * Each comm has a list of samples that will be used to draw
  70  * final graph.
  71  */
  72
  73 struct per_pid {
  74         struct per_pid *next;
  75
  76         int             pid;
  77         int             ppid;
  78
  79         u64             start_time;
  80         u64             end_time;
  81         u64             total_time;
  82         int             display;
  83
  84         struct per_pidcomm *all;
  85         struct per_pidcomm *current;
  86 };
  87
  88
  89 struct per_pidcomm {
  90         struct per_pidcomm *next;
  91
  92         u64             start_time;
  93         u64             end_time;
  94         u64             total_time;
  95
  96         int             Y;
  97         int             display;
  98
  99         long            state;
 100         u64             state_since;
 101
 102         char            *comm;
 103
 104         struct cpu_sample *samples;
 105 };
 106
 107 struct sample_wrapper {
 108         struct sample_wrapper *next;
 109
 110         u64             timestamp;
 111         unsigned char   data[0];
 112 };
 113
 114 #define TYPE_NONE       0
 115 #define TYPE_RUNNING    1
 116 #define TYPE_WAITING    2
 117 #define TYPE_BLOCKED    3
 118
 119 struct cpu_sample {
 120         struct cpu_sample *next;
 121
 122         u64 start_time;
 123         u64 end_time;
 124         int type;
 125         int cpu;
 126 };
 127
 128 static struct per_pid *all_data;
 129
 130 #define CSTATE 1
 131 #define PSTATE 2
 132
 133 struct power_event {
 134         struct power_event *next;
 135         int type;
 136         int state;
 137         u64 start_time;
 138         u64 end_time;
 139         int cpu;
 140 };
 141
 142 struct wake_event {
 143         struct wake_event *next;
 144         int waker;
 145         int wakee;
 146         u64 time;
 147 };
 148
 149 static struct power_event    *power_events;
 150 static struct wake_event     *wake_events;
 151
 152 struct process_filter;
 153 struct process_filter {
 154         char                    *name;
 155         int                     pid;
 156         struct process_filter   *next;
 157 };
 158
 159 static struct process_filter *process_filter;
 160
 161
 162 static struct per_pid *find_create_pid(int pid)
 163 {
 164         struct per_pid *cursor = all_data;
 165
 166         while (cursor) {
 167                 if (cursor->pid == pid)
 168                         return cursor;
 169                 cursor = cursor->next;
 170         }
 171         cursor = zalloc(sizeof(*cursor));
 172         assert(cursor != NULL);
 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 = zalloc(sizeof(*c));
 198         assert(c != NULL);
 199         c->comm = strdup(comm);
 200         p->current = c;
 201         c->next = p->all;
 202         p->all = c;
 203 }
 204
 205 static void pid_fork(int pid, int ppid, u64 timestamp)
 206 {
 207         struct per_pid *p, *pp;
 208         p = find_create_pid(pid);
 209         pp = find_create_pid(ppid);
 210         p->ppid = ppid;
 211         if (pp->current && pp->current->comm && !p->current)
 212                 pid_set_comm(pid, pp->current->comm);
 213
 214         p->start_time = timestamp;
 215         if (p->current) {
 216                 p->current->start_time = timestamp;
 217                 p->current->state_since = timestamp;
 218         }
 219 }
 220
 221 static void pid_exit(int pid, u64 timestamp)
 222 {
 223         struct per_pid *p;
 224         p = find_create_pid(pid);
 225         p->end_time = timestamp;
 226         if (p->current)
 227                 p->current->end_time = timestamp;
 228 }
 229
 230 static void
 231 pid_put_sample(int pid, int type, unsigned int cpu, u64 start, u64 end)
 232 {
 233         struct per_pid *p;
 234         struct per_pidcomm *c;
 235         struct cpu_sample *sample;
 236
 237         p = find_create_pid(pid);
 238         c = p->current;
 239         if (!c) {
 240                 c = zalloc(sizeof(*c));
 241                 assert(c != NULL);
 242                 p->current = c;
 243                 c->next = p->all;
 244                 p->all = c;
 245         }
 246
 247         sample = zalloc(sizeof(*sample));
 248         assert(sample != NULL);
 249         sample->start_time = start;
 250         sample->end_time = end;
 251         sample->type = type;
 252         sample->next = c->samples;
 253         sample->cpu = cpu;
 254         c->samples = sample;
 255
 256         if (sample->type == TYPE_RUNNING && end > start && start > 0) {
 257                 c->total_time += (end-start);
 258                 p->total_time += (end-start);
 259         }
 260
 261         if (c->start_time == 0 || c->start_time > start)
 262                 c->start_time = start;
 263         if (p->start_time == 0 || p->start_time > start)
 264                 p->start_time = start;
 265 }
 266
 267 #define MAX_CPUS 4096
 268
 269 static u64 cpus_cstate_start_times[MAX_CPUS];
 270 static int cpus_cstate_state[MAX_CPUS];
 271 static u64 cpus_pstate_start_times[MAX_CPUS];
 272 static u64 cpus_pstate_state[MAX_CPUS];
 273
 274 static int process_comm_event(struct perf_tool *tool __maybe_unused,
 275                               union perf_event *event,
 276                               struct perf_sample *sample __maybe_unused,
 277                               struct machine *machine __maybe_unused)
 278 {
 279         pid_set_comm(event->comm.tid, event->comm.comm);
 280         return 0;
 281 }
 282
 283 static int process_fork_event(struct perf_tool *tool __maybe_unused,
 284                               union perf_event *event,
 285                               struct perf_sample *sample __maybe_unused,
 286                               struct machine *machine __maybe_unused)
 287 {
 288         pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
 289         return 0;
 290 }
 291
 292 static int process_exit_event(struct perf_tool *tool __maybe_unused,
 293                               union perf_event *event,
 294                               struct perf_sample *sample __maybe_unused,
 295                               struct machine *machine __maybe_unused)
 296 {
 297         pid_exit(event->fork.pid, event->fork.time);
 298         return 0;
 299 }
 300
 301 struct trace_entry {
 302         unsigned short          type;
 303         unsigned char           flags;
 304         unsigned char           preempt_count;
 305         int                     pid;
 306         int                     lock_depth;
 307 };
 308
 309 #ifdef SUPPORT_OLD_POWER_EVENTS
 310 static int use_old_power_events;
 311 struct power_entry_old {
 312         struct trace_entry te;
 313         u64     type;
 314         u64     value;
 315         u64     cpu_id;
 316 };
 317 #endif
 318
 319 struct power_processor_entry {
 320         struct trace_entry te;
 321         u32     state;
 322         u32     cpu_id;
 323 };
 324
 325 #define TASK_COMM_LEN 16
 326 struct wakeup_entry {
 327         struct trace_entry te;
 328         char comm[TASK_COMM_LEN];
 329         int   pid;
 330         int   prio;
 331         int   success;
 332 };
 333
 334 /*
 335  * trace_flag_type is an enumeration that holds different
 336  * states when a trace occurs. These are:
 337  *  IRQS_OFF            - interrupts were disabled
 338  *  IRQS_NOSUPPORT      - arch does not support irqs_disabled_flags
 339  *  NEED_RESCED         - reschedule is requested
 340  *  HARDIRQ             - inside an interrupt handler
 341  *  SOFTIRQ             - inside a softirq handler
 342  */
 343 enum trace_flag_type {
 344         TRACE_FLAG_IRQS_OFF             = 0x01,
 345         TRACE_FLAG_IRQS_NOSUPPORT       = 0x02,
 346         TRACE_FLAG_NEED_RESCHED         = 0x04,
 347         TRACE_FLAG_HARDIRQ              = 0x08,
 348         TRACE_FLAG_SOFTIRQ              = 0x10,
 349 };
 350
 351
 352
 353 struct sched_switch {
 354         struct trace_entry te;
 355         char prev_comm[TASK_COMM_LEN];
 356         int  prev_pid;
 357         int  prev_prio;
 358         long prev_state; /* Arjan weeps. */
 359         char next_comm[TASK_COMM_LEN];
 360         int  next_pid;
 361         int  next_prio;
 362 };
 363
 364 static void c_state_start(int cpu, u64 timestamp, int state)
 365 {
 366         cpus_cstate_start_times[cpu] = timestamp;
 367         cpus_cstate_state[cpu] = state;
 368 }
 369
 370 static void c_state_end(int cpu, u64 timestamp)
 371 {
 372         struct power_event *pwr = zalloc(sizeof(*pwr));
 373
 374         if (!pwr)
 375                 return;
 376
 377         pwr->state = cpus_cstate_state[cpu];
 378         pwr->start_time = cpus_cstate_start_times[cpu];
 379         pwr->end_time = timestamp;
 380         pwr->cpu = cpu;
 381         pwr->type = CSTATE;
 382         pwr->next = power_events;
 383
 384         power_events = pwr;
 385 }
 386
 387 static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 388 {
 389         struct power_event *pwr;
 390
 391         if (new_freq > 8000000) /* detect invalid data */
 392                 return;
 393
 394         pwr = zalloc(sizeof(*pwr));
 395         if (!pwr)
 396                 return;
 397
 398         pwr->state = cpus_pstate_state[cpu];
 399         pwr->start_time = cpus_pstate_start_times[cpu];
 400         pwr->end_time = timestamp;
 401         pwr->cpu = cpu;
 402         pwr->type = PSTATE;
 403         pwr->next = power_events;
 404
 405         if (!pwr->start_time)
 406                 pwr->start_time = first_time;
 407
 408         power_events = pwr;
 409
 410         cpus_pstate_state[cpu] = new_freq;
 411         cpus_pstate_start_times[cpu] = timestamp;
 412
 413         if ((u64)new_freq > max_freq)
 414                 max_freq = new_freq;
 415
 416         if (new_freq < min_freq || min_freq == 0)
 417                 min_freq = new_freq;
 418
 419         if (new_freq == max_freq - 1000)
 420                         turbo_frequency = max_freq;
 421 }
 422
 423 static void
 424 sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
 425 {
 426         struct per_pid *p;
 427         struct wakeup_entry *wake = (void *)te;
 428         struct wake_event *we = zalloc(sizeof(*we));
 429
 430         if (!we)
 431                 return;
 432
 433         we->time = timestamp;
 434         we->waker = pid;
 435
 436         if ((te->flags & TRACE_FLAG_HARDIRQ) || (te->flags & TRACE_FLAG_SOFTIRQ))
 437                 we->waker = -1;
 438
 439         we->wakee = wake->pid;
 440         we->next = wake_events;
 441         wake_events = we;
 442         p = find_create_pid(we->wakee);
 443
 444         if (p && p->current && p->current->state == TYPE_NONE) {
 445                 p->current->state_since = timestamp;
 446                 p->current->state = TYPE_WAITING;
 447         }
 448         if (p && p->current && p->current->state == TYPE_BLOCKED) {
 449                 pid_put_sample(p->pid, p->current->state, cpu, p->current->state_since, timestamp);
 450                 p->current->state_since = timestamp;
 451                 p->current->state = TYPE_WAITING;
 452         }
 453 }
 454
 455 static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
 456 {
 457         struct per_pid *p = NULL, *prev_p;
 458         struct sched_switch *sw = (void *)te;
 459
 460
 461         prev_p = find_create_pid(sw->prev_pid);
 462
 463         p = find_create_pid(sw->next_pid);
 464
 465         if (prev_p->current && prev_p->current->state != TYPE_NONE)
 466                 pid_put_sample(sw->prev_pid, TYPE_RUNNING, cpu, prev_p->current->state_since, timestamp);
 467         if (p && p->current) {
 468                 if (p->current->state != TYPE_NONE)
 469                         pid_put_sample(sw->next_pid, p->current->state, cpu, p->current->state_since, timestamp);
 470
 471                 p->current->state_since = timestamp;
 472                 p->current->state = TYPE_RUNNING;
 473         }
 474
 475         if (prev_p->current) {
 476                 prev_p->current->state = TYPE_NONE;
 477                 prev_p->current->state_since = timestamp;
 478                 if (sw->prev_state & 2)
 479                         prev_p->current->state = TYPE_BLOCKED;
 480                 if (sw->prev_state == 0)
 481                         prev_p->current->state = TYPE_WAITING;
 482         }
 483 }
 484
 485
 486 static int process_sample_event(struct perf_tool *tool __maybe_unused,
 487                                 union perf_event *event __maybe_unused,
 488                                 struct perf_sample *sample,
 489                                 struct perf_evsel *evsel,
 490                                 struct machine *machine __maybe_unused)
 491 {
 492         struct trace_entry *te;
 493
 494         if (evsel->attr.sample_type & PERF_SAMPLE_TIME) {
 495                 if (!first_time || first_time > sample->time)
 496                         first_time = sample->time;
 497                 if (last_time < sample->time)
 498                         last_time = sample->time;
 499         }
 500
 501         te = (void *)sample->raw_data;
 502         if ((evsel->attr.sample_type & PERF_SAMPLE_RAW) && sample->raw_size > 0) {
 503                 char *event_str;
 504 #ifdef SUPPORT_OLD_POWER_EVENTS
 505                 struct power_entry_old *peo;
 506                 peo = (void *)te;
 507 #endif
 508                 /*
 509                  * FIXME: use evsel, its already mapped from id to perf_evsel,
 510                  * remove perf_header__find_event infrastructure bits.
 511                  * Mapping all these "power:cpu_idle" strings to the tracepoint
 512                  * ID and then just comparing against evsel->attr.config.
 513                  *
 514                  * e.g.:
 515                  *
 516                  * if (evsel->attr.config == power_cpu_idle_id)
 517                  */
 518                 event_str = perf_header__find_event(te->type);
 519
 520                 if (!event_str)
 521                         return 0;
 522
 523                 if (sample->cpu > numcpus)
 524                         numcpus = sample->cpu;
 525
 526                 if (strcmp(event_str, "power:cpu_idle") == 0) {
 527                         struct power_processor_entry *ppe = (void *)te;
 528                         if (ppe->state == (u32)PWR_EVENT_EXIT)
 529                                 c_state_end(ppe->cpu_id, sample->time);
 530                         else
 531                                 c_state_start(ppe->cpu_id, sample->time,
 532                                               ppe->state);
 533                 }
 534                 else if (strcmp(event_str, "power:cpu_frequency") == 0) {
 535                         struct power_processor_entry *ppe = (void *)te;
 536                         p_state_change(ppe->cpu_id, sample->time, ppe->state);
 537                 }
 538
 539                 else if (strcmp(event_str, "sched:sched_wakeup") == 0)
 540                         sched_wakeup(sample->cpu, sample->time, sample->pid, te);
 541
 542                 else if (strcmp(event_str, "sched:sched_switch") == 0)
 543                         sched_switch(sample->cpu, sample->time, te);
 544
 545 #ifdef SUPPORT_OLD_POWER_EVENTS
 546                 if (use_old_power_events) {
 547                         if (strcmp(event_str, "power:power_start") == 0)
 548                                 c_state_start(peo->cpu_id, sample->time,
 549                                               peo->value);
 550
 551                         else if (strcmp(event_str, "power:power_end") == 0)
 552                                 c_state_end(sample->cpu, sample->time);
 553
 554                         else if (strcmp(event_str,
 555                                         "power:power_frequency") == 0)
 556                                 p_state_change(peo->cpu_id, sample->time,
 557                                                peo->value);
 558                 }
 559 #endif
 560         }
 561         return 0;
 562 }
 563
 564 /*
 565  * After the last sample we need to wrap up the current C/P state
 566  * and close out each CPU for these.
 567  */
 568 static void end_sample_processing(void)
 569 {
 570         u64 cpu;
 571         struct power_event *pwr;
 572
 573         for (cpu = 0; cpu <= numcpus; cpu++) {
 574                 /* C state */
 575 #if 0
 576                 pwr = zalloc(sizeof(*pwr));
 577                 if (!pwr)
 578                         return;
 579
 580                 pwr->state = cpus_cstate_state[cpu];
 581                 pwr->start_time = cpus_cstate_start_times[cpu];
 582                 pwr->end_time = last_time;
 583                 pwr->cpu = cpu;
 584                 pwr->type = CSTATE;
 585                 pwr->next = power_events;
 586
 587                 power_events = pwr;
 588 #endif
 589                 /* P state */
 590
 591                 pwr = zalloc(sizeof(*pwr));
 592                 if (!pwr)
 593                         return;
 594
 595                 pwr->state = cpus_pstate_state[cpu];
 596                 pwr->start_time = cpus_pstate_start_times[cpu];
 597                 pwr->end_time = last_time;
 598                 pwr->cpu = cpu;
 599                 pwr->type = PSTATE;
 600                 pwr->next = power_events;
 601
 602                 if (!pwr->start_time)
 603                         pwr->start_time = first_time;
 604                 if (!pwr->state)
 605                         pwr->state = min_freq;
 606                 power_events = pwr;
 607         }
 608 }
 609
 610 /*
 611  * Sort the pid datastructure
 612  */
 613 static void sort_pids(void)
 614 {
 615         struct per_pid *new_list, *p, *cursor, *prev;
 616         /* sort by ppid first, then by pid, lowest to highest */
 617
 618         new_list = NULL;
 619
 620         while (all_data) {
 621                 p = all_data;
 622                 all_data = p->next;
 623                 p->next = NULL;
 624
 625                 if (new_list == NULL) {
 626                         new_list = p;
 627                         p->next = NULL;
 628                         continue;
 629                 }
 630                 prev = NULL;
 631                 cursor = new_list;
 632                 while (cursor) {
 633                         if (cursor->ppid > p->ppid ||
 634                                 (cursor->ppid == p->ppid && cursor->pid > p->pid)) {
 635                                 /* must insert before */
 636                                 if (prev) {
 637                                         p->next = prev->next;
 638                                         prev->next = p;
 639                                         cursor = NULL;
 640                                         continue;
 641                                 } else {
 642                                         p->next = new_list;
 643                                         new_list = p;
 644                                         cursor = NULL;
 645                                         continue;
 646                                 }
 647                         }
 648
 649                         prev = cursor;
 650                         cursor = cursor->next;
 651                         if (!cursor)
 652                                 prev->next = p;
 653                 }
 654         }
 655         all_data = new_list;
 656 }
 657
 658
 659 static void draw_c_p_states(void)
 660 {
 661         struct power_event *pwr;
 662         pwr = power_events;
 663
 664         /*
 665          * two pass drawing so that the P state bars are on top of the C state blocks
 666          */
 667         while (pwr) {
 668                 if (pwr->type == CSTATE)
 669                         svg_cstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 670                 pwr = pwr->next;
 671         }
 672
 673         pwr = power_events;
 674         while (pwr) {
 675                 if (pwr->type == PSTATE) {
 676                         if (!pwr->state)
 677                                 pwr->state = min_freq;
 678                         svg_pstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 679                 }
 680                 pwr = pwr->next;
 681         }
 682 }
 683
 684 static void draw_wakeups(void)
 685 {
 686         struct wake_event *we;
 687         struct per_pid *p;
 688         struct per_pidcomm *c;
 689
 690         we = wake_events;
 691         while (we) {
 692                 int from = 0, to = 0;
 693                 char *task_from = NULL, *task_to = NULL;
 694
 695                 /* locate the column of the waker and wakee */
 696                 p = all_data;
 697                 while (p) {
 698                         if (p->pid == we->waker || p->pid == we->wakee) {
 699                                 c = p->all;
 700                                 while (c) {
 701                                         if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
 702                                                 if (p->pid == we->waker && !from) {
 703                                                         from = c->Y;
 704                                                         task_from = strdup(c->comm);
 705                                                 }
 706                                                 if (p->pid == we->wakee && !to) {
 707                                                         to = c->Y;
 708                                                         task_to = strdup(c->comm);
 709                                                 }
 710                                         }
 711                                         c = c->next;
 712                                 }
 713                                 c = p->all;
 714                                 while (c) {
 715                                         if (p->pid == we->waker && !from) {
 716                                                 from = c->Y;
 717                                                 task_from = strdup(c->comm);
 718                                         }
 719                                         if (p->pid == we->wakee && !to) {
 720                                                 to = c->Y;
 721                                                 task_to = strdup(c->comm);
 722                                         }
 723                                         c = c->next;
 724                                 }
 725                         }
 726                         p = p->next;
 727                 }
 728
 729                 if (!task_from) {
 730                         task_from = malloc(40);
 731                         sprintf(task_from, "[%i]", we->waker);
 732                 }
 733                 if (!task_to) {
 734                         task_to = malloc(40);
 735                         sprintf(task_to, "[%i]", we->wakee);
 736                 }
 737
 738                 if (we->waker == -1)
 739                         svg_interrupt(we->time, to);
 740                 else if (from && to && abs(from - to) == 1)
 741                         svg_wakeline(we->time, from, to);
 742                 else
 743                         svg_partial_wakeline(we->time, from, task_from, to, task_to);
 744                 we = we->next;
 745
 746                 free(task_from);
 747                 free(task_to);
 748         }
 749 }
 750
 751 static void draw_cpu_usage(void)
 752 {
 753         struct per_pid *p;
 754         struct per_pidcomm *c;
 755         struct cpu_sample *sample;
 756         p = all_data;
 757         while (p) {
 758                 c = p->all;
 759                 while (c) {
 760                         sample = c->samples;
 761                         while (sample) {
 762                                 if (sample->type == TYPE_RUNNING)
 763                                         svg_process(sample->cpu, sample->start_time, sample->end_time, "sample", c->comm);
 764
 765                                 sample = sample->next;
 766                         }
 767                         c = c->next;
 768                 }
 769                 p = p->next;
 770         }
 771 }
 772
 773 static void draw_process_bars(void)
 774 {
 775         struct per_pid *p;
 776         struct per_pidcomm *c;
 777         struct cpu_sample *sample;
 778         int Y = 0;
 779
 780         Y = 2 * numcpus + 2;
 781
 782         p = all_data;
 783         while (p) {
 784                 c = p->all;
 785                 while (c) {
 786                         if (!c->display) {
 787                                 c->Y = 0;
 788                                 c = c->next;
 789                                 continue;
 790                         }
 791
 792                         svg_box(Y, c->start_time, c->end_time, "process");
 793                         sample = c->samples;
 794                         while (sample) {
 795                                 if (sample->type == TYPE_RUNNING)
 796                                         svg_sample(Y, sample->cpu, sample->start_time, sample->end_time);
 797                                 if (sample->type == TYPE_BLOCKED)
 798                                         svg_box(Y, sample->start_time, sample->end_time, "blocked");
 799                                 if (sample->type == TYPE_WAITING)
 800                                         svg_waiting(Y, sample->start_time, sample->end_time);
 801                                 sample = sample->next;
 802                         }
 803
 804                         if (c->comm) {
 805                                 char comm[256];
 806                                 if (c->total_time > 5000000000) /* 5 seconds */
 807                                         sprintf(comm, "%s:%i (%2.2fs)", c->comm, p->pid, c->total_time / 1000000000.0);
 808                                 else
 809                                         sprintf(comm, "%s:%i (%3.1fms)", c->comm, p->pid, c->total_time / 1000000.0);
 810
 811                                 svg_text(Y, c->start_time, comm);
 812                         }
 813                         c->Y = Y;
 814                         Y++;
 815                         c = c->next;
 816                 }
 817                 p = p->next;
 818         }
 819 }
 820
 821 static void add_process_filter(const char *string)
 822 {
 823         int pid = strtoull(string, NULL, 10);
 824         struct process_filter *filt = malloc(sizeof(*filt));
 825
 826         if (!filt)
 827                 return;
 828
 829         filt->name = strdup(string);
 830         filt->pid  = pid;
 831         filt->next = process_filter;
 832
 833         process_filter = filt;
 834 }
 835
 836 static int passes_filter(struct per_pid *p, struct per_pidcomm *c)
 837 {
 838         struct process_filter *filt;
 839         if (!process_filter)
 840                 return 1;
 841
 842         filt = process_filter;
 843         while (filt) {
 844                 if (filt->pid && p->pid == filt->pid)
 845                         return 1;
 846                 if (strcmp(filt->name, c->comm) == 0)
 847                         return 1;
 848                 filt = filt->next;
 849         }
 850         return 0;
 851 }
 852
 853 static int determine_display_tasks_filtered(void)
 854 {
 855         struct per_pid *p;
 856         struct per_pidcomm *c;
 857         int count = 0;
 858
 859         p = all_data;
 860         while (p) {
 861                 p->display = 0;
 862                 if (p->start_time == 1)
 863                         p->start_time = first_time;
 864
 865                 /* no exit marker, task kept running to the end */
 866                 if (p->end_time == 0)
 867                         p->end_time = last_time;
 868
 869                 c = p->all;
 870
 871                 while (c) {
 872                         c->display = 0;
 873
 874                         if (c->start_time == 1)
 875                                 c->start_time = first_time;
 876
 877                         if (passes_filter(p, c)) {
 878                                 c->display = 1;
 879                                 p->display = 1;
 880                                 count++;
 881                         }
 882
 883                         if (c->end_time == 0)
 884                                 c->end_time = last_time;
 885
 886                         c = c->next;
 887                 }
 888                 p = p->next;
 889         }
 890         return count;
 891 }
 892
 893 static int determine_display_tasks(u64 threshold)
 894 {
 895         struct per_pid *p;
 896         struct per_pidcomm *c;
 897         int count = 0;
 898
 899         if (process_filter)
 900                 return determine_display_tasks_filtered();
 901
 902         p = all_data;
 903         while (p) {
 904                 p->display = 0;
 905                 if (p->start_time == 1)
 906                         p->start_time = first_time;
 907
 908                 /* no exit marker, task kept running to the end */
 909                 if (p->end_time == 0)
 910                         p->end_time = last_time;
 911                 if (p->total_time >= threshold && !power_only)
 912                         p->display = 1;
 913
 914                 c = p->all;
 915
 916                 while (c) {
 917                         c->display = 0;
 918
 919                         if (c->start_time == 1)
 920                                 c->start_time = first_time;
 921
 922                         if (c->total_time >= threshold && !power_only) {
 923                                 c->display = 1;
 924                                 count++;
 925                         }
 926
 927                         if (c->end_time == 0)
 928                                 c->end_time = last_time;
 929
 930                         c = c->next;
 931                 }
 932                 p = p->next;
 933         }
 934         return count;
 935 }
 936
 937
 938
 939 #define TIME_THRESH 10000000
 940
 941 static void write_svg_file(const char *filename)
 942 {
 943         u64 i;
 944         int count;
 945
 946         numcpus++;
 947
 948
 949         count = determine_display_tasks(TIME_THRESH);
 950
 951         /* We'd like to show at least 15 tasks; be less picky if we have fewer */
 952         if (count < 15)
 953                 count = determine_display_tasks(TIME_THRESH / 10);
 954
 955         open_svg(filename, numcpus, count, first_time, last_time);
 956
 957         svg_time_grid();
 958         svg_legenda();
 959
 960         for (i = 0; i < numcpus; i++)
 961                 svg_cpu_box(i, max_freq, turbo_frequency);
 962
 963         draw_cpu_usage();
 964         draw_process_bars();
 965         draw_c_p_states();
 966         draw_wakeups();
 967
 968         svg_close();
 969 }
 970
 971 static struct perf_tool perf_timechart = {
 972         .comm                   = process_comm_event,
 973         .fork                   = process_fork_event,
 974         .exit                   = process_exit_event,
 975         .sample                 = process_sample_event,
 976         .ordered_samples        = true,
 977 };
 978
 979 static int __cmd_timechart(void)
 980 {
 981         struct perf_session *session = perf_session__new(input_name, O_RDONLY,
 982                                                          0, false, &perf_timechart);
 983         int ret = -EINVAL;
 984
 985         if (session == NULL)
 986                 return -ENOMEM;
 987
 988         if (!perf_session__has_traces(session, "timechart record"))
 989                 goto out_delete;
 990
 991         ret = perf_session__process_events(session, &perf_timechart);
 992         if (ret)
 993                 goto out_delete;
 994
 995         end_sample_processing();
 996
 997         sort_pids();
 998
 999         write_svg_file(output_name);
1000
1001         pr_info("Written %2.1f seconds of trace to %s.\n",
1002                 (last_time - first_time) / 1000000000.0, output_name);
1003 out_delete:
1004         perf_session__delete(session);
1005         return ret;
1006 }
1007
1008 static const char * const timechart_usage[] = {
1009         "perf timechart [<options>] {record}",
1010         NULL
1011 };
1012
1013 #ifdef SUPPORT_OLD_POWER_EVENTS
1014 static const char * const record_old_args[] = {
1015         "record",
1016         "-a",
1017         "-R",
1018         "-f",
1019         "-c", "1",
1020         "-e", "power:power_start",
1021         "-e", "power:power_end",
1022         "-e", "power:power_frequency",
1023         "-e", "sched:sched_wakeup",
1024         "-e", "sched:sched_switch",
1025 };
1026 #endif
1027
1028 static const char * const record_new_args[] = {
1029         "record",
1030         "-a",
1031         "-R",
1032         "-f",
1033         "-c", "1",
1034         "-e", "power:cpu_frequency",
1035         "-e", "power:cpu_idle",
1036         "-e", "sched:sched_wakeup",
1037         "-e", "sched:sched_switch",
1038 };
1039
1040 static int __cmd_record(int argc, const char **argv)
1041 {
1042         unsigned int rec_argc, i, j;
1043         const char **rec_argv;
1044         const char * const *record_args = record_new_args;
1045         unsigned int record_elems = ARRAY_SIZE(record_new_args);
1046
1047 #ifdef SUPPORT_OLD_POWER_EVENTS
1048         if (!is_valid_tracepoint("power:cpu_idle") &&
1049             is_valid_tracepoint("power:power_start")) {
1050                 use_old_power_events = 1;
1051                 record_args = record_old_args;
1052                 record_elems = ARRAY_SIZE(record_old_args);
1053         }
1054 #endif
1055
1056         rec_argc = record_elems + argc - 1;
1057         rec_argv = calloc(rec_argc + 1, sizeof(char *));
1058
1059         if (rec_argv == NULL)
1060                 return -ENOMEM;
1061
1062         for (i = 0; i < record_elems; i++)
1063                 rec_argv[i] = strdup(record_args[i]);
1064
1065         for (j = 1; j < (unsigned int)argc; j++, i++)
1066                 rec_argv[i] = argv[j];
1067
1068         return cmd_record(i, rec_argv, NULL);
1069 }
1070
1071 static int
1072 parse_process(const struct option *opt __maybe_unused, const char *arg,
1073               int __maybe_unused unset)
1074 {
1075         if (arg)
1076                 add_process_filter(arg);
1077         return 0;
1078 }
1079
1080 static const struct option options[] = {
1081         OPT_STRING('i', "input", &input_name, "file",
1082                     "input file name"),
1083         OPT_STRING('o', "output", &output_name, "file",
1084                     "output file name"),
1085         OPT_INTEGER('w', "width", &svg_page_width,
1086                     "page width"),
1087         OPT_BOOLEAN('P', "power-only", &power_only,
1088                     "output power data only"),
1089         OPT_CALLBACK('p', "process", NULL, "process",
1090                       "process selector. Pass a pid or process name.",
1091                        parse_process),
1092         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1093                     "Look for files with symbols relative to this directory"),
1094         OPT_END()
1095 };
1096
1097
1098 int cmd_timechart(int argc, const char **argv,
1099                   const char *prefix __maybe_unused)
1100 {
1101         argc = parse_options(argc, argv, options, timechart_usage,
1102                         PARSE_OPT_STOP_AT_NON_OPTION);
1103
1104         symbol__init();
1105
1106         if (argc && !strncmp(argv[0], "rec", 3))
1107                 return __cmd_record(argc, argv);
1108         else if (argc)
1109                 usage_with_options(timechart_usage, options);
1110
1111         setup_pager();
1112
1113         return __cmd_timechart();
1114 }