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 <[email protected]>
   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 = malloc(sizeof(struct per_pid));
 172         assert(cursor != NULL);
 173         memset(cursor, 0, sizeof(struct per_pid));
 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 = malloc(sizeof(struct per_pidcomm));
 199         assert(c != NULL);
 200         memset(c, 0, sizeof(struct per_pidcomm));
 201         c->comm = strdup(comm);
 202         p->current = c;
 203         c->next = p->all;
 204         p->all = c;
 205 }
 206
 207 static void pid_fork(int pid, int ppid, u64 timestamp)
 208 {
 209         struct per_pid *p, *pp;
 210         p = find_create_pid(pid);
 211         pp = find_create_pid(ppid);
 212         p->ppid = ppid;
 213         if (pp->current && pp->current->comm && !p->current)
 214                 pid_set_comm(pid, pp->current->comm);
 215
 216         p->start_time = timestamp;
 217         if (p->current) {
 218                 p->current->start_time = timestamp;
 219                 p->current->state_since = timestamp;
 220         }
 221 }
 222
 223 static void pid_exit(int pid, u64 timestamp)
 224 {
 225         struct per_pid *p;
 226         p = find_create_pid(pid);
 227         p->end_time = timestamp;
 228         if (p->current)
 229                 p->current->end_time = timestamp;
 230 }
 231
 232 static void
 233 pid_put_sample(int pid, int type, unsigned int cpu, u64 start, u64 end)
 234 {
 235         struct per_pid *p;
 236         struct per_pidcomm *c;
 237         struct cpu_sample *sample;
 238
 239         p = find_create_pid(pid);
 240         c = p->current;
 241         if (!c) {
 242                 c = malloc(sizeof(struct per_pidcomm));
 243                 assert(c != NULL);
 244                 memset(c, 0, sizeof(struct per_pidcomm));
 245                 p->current = c;
 246                 c->next = p->all;
 247                 p->all = c;
 248         }
 249
 250         sample = malloc(sizeof(struct cpu_sample));
 251         assert(sample != NULL);
 252         memset(sample, 0, sizeof(struct cpu_sample));
 253         sample->start_time = start;
 254         sample->end_time = end;
 255         sample->type = type;
 256         sample->next = c->samples;
 257         sample->cpu = cpu;
 258         c->samples = sample;
 259
 260         if (sample->type == TYPE_RUNNING && end > start && start > 0) {
 261                 c->total_time += (end-start);
 262                 p->total_time += (end-start);
 263         }
 264
 265         if (c->start_time == 0 || c->start_time > start)
 266                 c->start_time = start;
 267         if (p->start_time == 0 || p->start_time > start)
 268                 p->start_time = start;
 269 }
 270
 271 #define MAX_CPUS 4096
 272
 273 static u64 cpus_cstate_start_times[MAX_CPUS];
 274 static int cpus_cstate_state[MAX_CPUS];
 275 static u64 cpus_pstate_start_times[MAX_CPUS];
 276 static u64 cpus_pstate_state[MAX_CPUS];
 277
 278 static int process_comm_event(struct perf_tool *tool __used,
 279                               union perf_event *event,
 280                               struct perf_sample *sample __used,
 281                               struct machine *machine __used)
 282 {
 283         pid_set_comm(event->comm.tid, event->comm.comm);
 284         return 0;
 285 }
 286
 287 static int process_fork_event(struct perf_tool *tool __used,
 288                               union perf_event *event,
 289                               struct perf_sample *sample __used,
 290                               struct machine *machine __used)
 291 {
 292         pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
 293         return 0;
 294 }
 295
 296 static int process_exit_event(struct perf_tool *tool __used,
 297                               union perf_event *event,
 298                               struct perf_sample *sample __used,
 299                               struct machine *machine __used)
 300 {
 301         pid_exit(event->fork.pid, event->fork.time);
 302         return 0;
 303 }
 304
 305 struct trace_entry {
 306         unsigned short          type;
 307         unsigned char           flags;
 308         unsigned char           preempt_count;
 309         int                     pid;
 310         int                     lock_depth;
 311 };
 312
 313 #ifdef SUPPORT_OLD_POWER_EVENTS
 314 static int use_old_power_events;
 315 struct power_entry_old {
 316         struct trace_entry te;
 317         u64     type;
 318         u64     value;
 319         u64     cpu_id;
 320 };
 321 #endif
 322
 323 struct power_processor_entry {
 324         struct trace_entry te;
 325         u32     state;
 326         u32     cpu_id;
 327 };
 328
 329 #define TASK_COMM_LEN 16
 330 struct wakeup_entry {
 331         struct trace_entry te;
 332         char comm[TASK_COMM_LEN];
 333         int   pid;
 334         int   prio;
 335         int   success;
 336 };
 337
 338 /*
 339  * trace_flag_type is an enumeration that holds different
 340  * states when a trace occurs. These are:
 341  *  IRQS_OFF            - interrupts were disabled
 342  *  IRQS_NOSUPPORT      - arch does not support irqs_disabled_flags
 343  *  NEED_RESCED         - reschedule is requested
 344  *  HARDIRQ             - inside an interrupt handler
 345  *  SOFTIRQ             - inside a softirq handler
 346  */
 347 enum trace_flag_type {
 348         TRACE_FLAG_IRQS_OFF             = 0x01,
 349         TRACE_FLAG_IRQS_NOSUPPORT       = 0x02,
 350         TRACE_FLAG_NEED_RESCHED         = 0x04,
 351         TRACE_FLAG_HARDIRQ              = 0x08,
 352         TRACE_FLAG_SOFTIRQ              = 0x10,
 353 };
 354
 355
 356
 357 struct sched_switch {
 358         struct trace_entry te;
 359         char prev_comm[TASK_COMM_LEN];
 360         int  prev_pid;
 361         int  prev_prio;
 362         long prev_state; /* Arjan weeps. */
 363         char next_comm[TASK_COMM_LEN];
 364         int  next_pid;
 365         int  next_prio;
 366 };
 367
 368 static void c_state_start(int cpu, u64 timestamp, int state)
 369 {
 370         cpus_cstate_start_times[cpu] = timestamp;
 371         cpus_cstate_state[cpu] = state;
 372 }
 373
 374 static void c_state_end(int cpu, u64 timestamp)
 375 {
 376         struct power_event *pwr;
 377         pwr = malloc(sizeof(struct power_event));
 378         if (!pwr)
 379                 return;
 380         memset(pwr, 0, sizeof(struct power_event));
 381
 382         pwr->state = cpus_cstate_state[cpu];
 383         pwr->start_time = cpus_cstate_start_times[cpu];
 384         pwr->end_time = timestamp;
 385         pwr->cpu = cpu;
 386         pwr->type = CSTATE;
 387         pwr->next = power_events;
 388
 389         power_events = pwr;
 390 }
 391
 392 static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 393 {
 394         struct power_event *pwr;
 395         pwr = malloc(sizeof(struct power_event));
 396
 397         if (new_freq > 8000000) /* detect invalid data */
 398                 return;
 399
 400         if (!pwr)
 401                 return;
 402         memset(pwr, 0, sizeof(struct power_event));
 403
 404         pwr->state = cpus_pstate_state[cpu];
 405         pwr->start_time = cpus_pstate_start_times[cpu];
 406         pwr->end_time = timestamp;
 407         pwr->cpu = cpu;
 408         pwr->type = PSTATE;
 409         pwr->next = power_events;
 410
 411         if (!pwr->start_time)
 412                 pwr->start_time = first_time;
 413
 414         power_events = pwr;
 415
 416         cpus_pstate_state[cpu] = new_freq;
 417         cpus_pstate_start_times[cpu] = timestamp;
 418
 419         if ((u64)new_freq > max_freq)
 420                 max_freq = new_freq;
 421
 422         if (new_freq < min_freq || min_freq == 0)
 423                 min_freq = new_freq;
 424
 425         if (new_freq == max_freq - 1000)
 426                         turbo_frequency = max_freq;
 427 }
 428
 429 static void
 430 sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
 431 {
 432         struct wake_event *we;
 433         struct per_pid *p;
 434         struct wakeup_entry *wake = (void *)te;
 435
 436         we = malloc(sizeof(struct wake_event));
 437         if (!we)
 438                 return;
 439
 440         memset(we, 0, sizeof(struct wake_event));
 441         we->time = timestamp;
 442         we->waker = pid;
 443
 444         if ((te->flags & TRACE_FLAG_HARDIRQ) || (te->flags & TRACE_FLAG_SOFTIRQ))
 445                 we->waker = -1;
 446
 447         we->wakee = wake->pid;
 448         we->next = wake_events;
 449         wake_events = we;
 450         p = find_create_pid(we->wakee);
 451
 452         if (p && p->current && p->current->state == TYPE_NONE) {
 453                 p->current->state_since = timestamp;
 454                 p->current->state = TYPE_WAITING;
 455         }
 456         if (p && p->current && p->current->state == TYPE_BLOCKED) {
 457                 pid_put_sample(p->pid, p->current->state, cpu, p->current->state_since, timestamp);
 458                 p->current->state_since = timestamp;
 459                 p->current->state = TYPE_WAITING;
 460         }
 461 }
 462
 463 static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
 464 {
 465         struct per_pid *p = NULL, *prev_p;
 466         struct sched_switch *sw = (void *)te;
 467
 468
 469         prev_p = find_create_pid(sw->prev_pid);
 470
 471         p = find_create_pid(sw->next_pid);
 472
 473         if (prev_p->current && prev_p->current->state != TYPE_NONE)
 474                 pid_put_sample(sw->prev_pid, TYPE_RUNNING, cpu, prev_p->current->state_since, timestamp);
 475         if (p && p->current) {
 476                 if (p->current->state != TYPE_NONE)
 477                         pid_put_sample(sw->next_pid, p->current->state, cpu, p->current->state_since, timestamp);
 478
 479                 p->current->state_since = timestamp;
 480                 p->current->state = TYPE_RUNNING;
 481         }
 482
 483         if (prev_p->current) {
 484                 prev_p->current->state = TYPE_NONE;
 485                 prev_p->current->state_since = timestamp;
 486                 if (sw->prev_state & 2)
 487                         prev_p->current->state = TYPE_BLOCKED;
 488                 if (sw->prev_state == 0)
 489                         prev_p->current->state = TYPE_WAITING;
 490         }
 491 }
 492
 493
 494 static int process_sample_event(struct perf_tool *tool __used,
 495                                 union perf_event *event __used,
 496                                 struct perf_sample *sample,
 497                                 struct perf_evsel *evsel,
 498                                 struct machine *machine __used)
 499 {
 500         struct trace_entry *te;
 501
 502         if (evsel->attr.sample_type & PERF_SAMPLE_TIME) {
 503                 if (!first_time || first_time > sample->time)
 504                         first_time = sample->time;
 505                 if (last_time < sample->time)
 506                         last_time = sample->time;
 507         }
 508
 509         te = (void *)sample->raw_data;
 510         if ((evsel->attr.sample_type & PERF_SAMPLE_RAW) && sample->raw_size > 0) {
 511                 char *event_str;
 512 #ifdef SUPPORT_OLD_POWER_EVENTS
 513                 struct power_entry_old *peo;
 514                 peo = (void *)te;
 515 #endif
 516                 /*
 517                  * FIXME: use evsel, its already mapped from id to perf_evsel,
 518                  * remove perf_header__find_event infrastructure bits.
 519                  * Mapping all these "power:cpu_idle" strings to the tracepoint
 520                  * ID and then just comparing against evsel->attr.config.
 521                  *
 522                  * e.g.:
 523                  *
 524                  * if (evsel->attr.config == power_cpu_idle_id)
 525                  */
 526                 event_str = perf_header__find_event(te->type);
 527
 528                 if (!event_str)
 529                         return 0;
 530
 531                 if (sample->cpu > numcpus)
 532                         numcpus = sample->cpu;
 533
 534                 if (strcmp(event_str, "power:cpu_idle") == 0) {
 535                         struct power_processor_entry *ppe = (void *)te;
 536                         if (ppe->state == (u32)PWR_EVENT_EXIT)
 537                                 c_state_end(ppe->cpu_id, sample->time);
 538                         else
 539                                 c_state_start(ppe->cpu_id, sample->time,
 540                                               ppe->state);
 541                 }
 542                 else if (strcmp(event_str, "power:cpu_frequency") == 0) {
 543                         struct power_processor_entry *ppe = (void *)te;
 544                         p_state_change(ppe->cpu_id, sample->time, ppe->state);
 545                 }
 546
 547                 else if (strcmp(event_str, "sched:sched_wakeup") == 0)
 548                         sched_wakeup(sample->cpu, sample->time, sample->pid, te);
 549
 550                 else if (strcmp(event_str, "sched:sched_switch") == 0)
 551                         sched_switch(sample->cpu, sample->time, te);
 552
 553 #ifdef SUPPORT_OLD_POWER_EVENTS
 554                 if (use_old_power_events) {
 555                         if (strcmp(event_str, "power:power_start") == 0)
 556                                 c_state_start(peo->cpu_id, sample->time,
 557                                               peo->value);
 558
 559                         else if (strcmp(event_str, "power:power_end") == 0)
 560                                 c_state_end(sample->cpu, sample->time);
 561
 562                         else if (strcmp(event_str,
 563                                         "power:power_frequency") == 0)
 564                                 p_state_change(peo->cpu_id, sample->time,
 565                                                peo->value);
 566                 }
 567 #endif
 568         }
 569         return 0;
 570 }
 571
 572 /*
 573  * After the last sample we need to wrap up the current C/P state
 574  * and close out each CPU for these.
 575  */
 576 static void end_sample_processing(void)
 577 {
 578         u64 cpu;
 579         struct power_event *pwr;
 580
 581         for (cpu = 0; cpu <= numcpus; cpu++) {
 582                 pwr = malloc(sizeof(struct power_event));
 583                 if (!pwr)
 584                         return;
 585                 memset(pwr, 0, sizeof(struct power_event));
 586
 587                 /* C state */
 588 #if 0
 589                 pwr->state = cpus_cstate_state[cpu];
 590                 pwr->start_time = cpus_cstate_start_times[cpu];
 591                 pwr->end_time = last_time;
 592                 pwr->cpu = cpu;
 593                 pwr->type = CSTATE;
 594                 pwr->next = power_events;
 595
 596                 power_events = pwr;
 597 #endif
 598                 /* P state */
 599
 600                 pwr = malloc(sizeof(struct power_event));
 601                 if (!pwr)
 602                         return;
 603                 memset(pwr, 0, sizeof(struct power_event));
 604
 605                 pwr->state = cpus_pstate_state[cpu];
 606                 pwr->start_time = cpus_pstate_start_times[cpu];
 607                 pwr->end_time = last_time;
 608                 pwr->cpu = cpu;
 609                 pwr->type = PSTATE;
 610                 pwr->next = power_events;
 611
 612                 if (!pwr->start_time)
 613                         pwr->start_time = first_time;
 614                 if (!pwr->state)
 615                         pwr->state = min_freq;
 616                 power_events = pwr;
 617         }
 618 }
 619
 620 /*
 621  * Sort the pid datastructure
 622  */
 623 static void sort_pids(void)
 624 {
 625         struct per_pid *new_list, *p, *cursor, *prev;
 626         /* sort by ppid first, then by pid, lowest to highest */
 627
 628         new_list = NULL;
 629
 630         while (all_data) {
 631                 p = all_data;
 632                 all_data = p->next;
 633                 p->next = NULL;
 634
 635                 if (new_list == NULL) {
 636                         new_list = p;
 637                         p->next = NULL;
 638                         continue;
 639                 }
 640                 prev = NULL;
 641                 cursor = new_list;
 642                 while (cursor) {
 643                         if (cursor->ppid > p->ppid ||
 644                                 (cursor->ppid == p->ppid && cursor->pid > p->pid)) {
 645                                 /* must insert before */
 646                                 if (prev) {
 647                                         p->next = prev->next;
 648                                         prev->next = p;
 649                                         cursor = NULL;
 650                                         continue;
 651                                 } else {
 652                                         p->next = new_list;
 653                                         new_list = p;
 654                                         cursor = NULL;
 655                                         continue;
 656                                 }
 657                         }
 658
 659                         prev = cursor;
 660                         cursor = cursor->next;
 661                         if (!cursor)
 662                                 prev->next = p;
 663                 }
 664         }
 665         all_data = new_list;
 666 }
 667
 668
 669 static void draw_c_p_states(void)
 670 {
 671         struct power_event *pwr;
 672         pwr = power_events;
 673
 674         /*
 675          * two pass drawing so that the P state bars are on top of the C state blocks
 676          */
 677         while (pwr) {
 678                 if (pwr->type == CSTATE)
 679                         svg_cstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 680                 pwr = pwr->next;
 681         }
 682
 683         pwr = power_events;
 684         while (pwr) {
 685                 if (pwr->type == PSTATE) {
 686                         if (!pwr->state)
 687                                 pwr->state = min_freq;
 688                         svg_pstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 689                 }
 690                 pwr = pwr->next;
 691         }
 692 }
 693
 694 static void draw_wakeups(void)
 695 {
 696         struct wake_event *we;
 697         struct per_pid *p;
 698         struct per_pidcomm *c;
 699
 700         we = wake_events;
 701         while (we) {
 702                 int from = 0, to = 0;
 703                 char *task_from = NULL, *task_to = NULL;
 704
 705                 /* locate the column of the waker and wakee */
 706                 p = all_data;
 707                 while (p) {
 708                         if (p->pid == we->waker || p->pid == we->wakee) {
 709                                 c = p->all;
 710                                 while (c) {
 711                                         if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
 712                                                 if (p->pid == we->waker && !from) {
 713                                                         from = c->Y;
 714                                                         task_from = strdup(c->comm);
 715                                                 }
 716                                                 if (p->pid == we->wakee && !to) {
 717                                                         to = c->Y;
 718                                                         task_to = strdup(c->comm);
 719                                                 }
 720                                         }
 721                                         c = c->next;
 722                                 }
 723                                 c = p->all;
 724                                 while (c) {
 725                                         if (p->pid == we->waker && !from) {
 726                                                 from = c->Y;
 727                                                 task_from = strdup(c->comm);
 728                                         }
 729                                         if (p->pid == we->wakee && !to) {
 730                                                 to = c->Y;
 731                                                 task_to = strdup(c->comm);
 732                                         }
 733                                         c = c->next;
 734                                 }
 735                         }
 736                         p = p->next;
 737                 }
 738
 739                 if (!task_from) {
 740                         task_from = malloc(40);
 741                         sprintf(task_from, "[%i]", we->waker);
 742                 }
 743                 if (!task_to) {
 744                         task_to = malloc(40);
 745                         sprintf(task_to, "[%i]", we->wakee);
 746                 }
 747
 748                 if (we->waker == -1)
 749                         svg_interrupt(we->time, to);
 750                 else if (from && to && abs(from - to) == 1)
 751                         svg_wakeline(we->time, from, to);
 752                 else
 753                         svg_partial_wakeline(we->time, from, task_from, to, task_to);
 754                 we = we->next;
 755
 756                 free(task_from);
 757                 free(task_to);
 758         }
 759 }
 760
 761 static void draw_cpu_usage(void)
 762 {
 763         struct per_pid *p;
 764         struct per_pidcomm *c;
 765         struct cpu_sample *sample;
 766         p = all_data;
 767         while (p) {
 768                 c = p->all;
 769                 while (c) {
 770                         sample = c->samples;
 771                         while (sample) {
 772                                 if (sample->type == TYPE_RUNNING)
 773                                         svg_process(sample->cpu, sample->start_time, sample->end_time, "sample", c->comm);
 774
 775                                 sample = sample->next;
 776                         }
 777                         c = c->next;
 778                 }
 779                 p = p->next;
 780         }
 781 }
 782
 783 static void draw_process_bars(void)
 784 {
 785         struct per_pid *p;
 786         struct per_pidcomm *c;
 787         struct cpu_sample *sample;
 788         int Y = 0;
 789
 790         Y = 2 * numcpus + 2;
 791
 792         p = all_data;
 793         while (p) {
 794                 c = p->all;
 795                 while (c) {
 796                         if (!c->display) {
 797                                 c->Y = 0;
 798                                 c = c->next;
 799                                 continue;
 800                         }
 801
 802                         svg_box(Y, c->start_time, c->end_time, "process");
 803                         sample = c->samples;
 804                         while (sample) {
 805                                 if (sample->type == TYPE_RUNNING)
 806                                         svg_sample(Y, sample->cpu, sample->start_time, sample->end_time);
 807                                 if (sample->type == TYPE_BLOCKED)
 808                                         svg_box(Y, sample->start_time, sample->end_time, "blocked");
 809                                 if (sample->type == TYPE_WAITING)
 810                                         svg_waiting(Y, sample->start_time, sample->end_time);
 811                                 sample = sample->next;
 812                         }
 813
 814                         if (c->comm) {
 815                                 char comm[256];
 816                                 if (c->total_time > 5000000000) /* 5 seconds */
 817                                         sprintf(comm, "%s:%i (%2.2fs)", c->comm, p->pid, c->total_time / 1000000000.0);
 818                                 else
 819                                         sprintf(comm, "%s:%i (%3.1fms)", c->comm, p->pid, c->total_time / 1000000.0);
 820
 821                                 svg_text(Y, c->start_time, comm);
 822                         }
 823                         c->Y = Y;
 824                         Y++;
 825                         c = c->next;
 826                 }
 827                 p = p->next;
 828         }
 829 }
 830
 831 static void add_process_filter(const char *string)
 832 {
 833         struct process_filter *filt;
 834         int pid;
 835
 836         pid = strtoull(string, NULL, 10);
 837         filt = malloc(sizeof(struct process_filter));
 838         if (!filt)
 839                 return;
 840
 841         filt->name = strdup(string);
 842         filt->pid  = pid;
 843         filt->next = process_filter;
 844
 845         process_filter = filt;
 846 }
 847
 848 static int passes_filter(struct per_pid *p, struct per_pidcomm *c)
 849 {
 850         struct process_filter *filt;
 851         if (!process_filter)
 852                 return 1;
 853
 854         filt = process_filter;
 855         while (filt) {
 856                 if (filt->pid && p->pid == filt->pid)
 857                         return 1;
 858                 if (strcmp(filt->name, c->comm) == 0)
 859                         return 1;
 860                 filt = filt->next;
 861         }
 862         return 0;
 863 }
 864
 865 static int determine_display_tasks_filtered(void)
 866 {
 867         struct per_pid *p;
 868         struct per_pidcomm *c;
 869         int count = 0;
 870
 871         p = all_data;
 872         while (p) {
 873                 p->display = 0;
 874                 if (p->start_time == 1)
 875                         p->start_time = first_time;
 876
 877                 /* no exit marker, task kept running to the end */
 878                 if (p->end_time == 0)
 879                         p->end_time = last_time;
 880
 881                 c = p->all;
 882
 883                 while (c) {
 884                         c->display = 0;
 885
 886                         if (c->start_time == 1)
 887                                 c->start_time = first_time;
 888
 889                         if (passes_filter(p, c)) {
 890                                 c->display = 1;
 891                                 p->display = 1;
 892                                 count++;
 893                         }
 894
 895                         if (c->end_time == 0)
 896                                 c->end_time = last_time;
 897
 898                         c = c->next;
 899                 }
 900                 p = p->next;
 901         }
 902         return count;
 903 }
 904
 905 static int determine_display_tasks(u64 threshold)
 906 {
 907         struct per_pid *p;
 908         struct per_pidcomm *c;
 909         int count = 0;
 910
 911         if (process_filter)
 912                 return determine_display_tasks_filtered();
 913
 914         p = all_data;
 915         while (p) {
 916                 p->display = 0;
 917                 if (p->start_time == 1)
 918                         p->start_time = first_time;
 919
 920                 /* no exit marker, task kept running to the end */
 921                 if (p->end_time == 0)
 922                         p->end_time = last_time;
 923                 if (p->total_time >= threshold && !power_only)
 924                         p->display = 1;
 925
 926                 c = p->all;
 927
 928                 while (c) {
 929                         c->display = 0;
 930
 931                         if (c->start_time == 1)
 932                                 c->start_time = first_time;
 933
 934                         if (c->total_time >= threshold && !power_only) {
 935                                 c->display = 1;
 936                                 count++;
 937                         }
 938
 939                         if (c->end_time == 0)
 940                                 c->end_time = last_time;
 941
 942                         c = c->next;
 943                 }
 944                 p = p->next;
 945         }
 946         return count;
 947 }
 948
 949
 950
 951 #define TIME_THRESH 10000000
 952
 953 static void write_svg_file(const char *filename)
 954 {
 955         u64 i;
 956         int count;
 957
 958         numcpus++;
 959
 960
 961         count = determine_display_tasks(TIME_THRESH);
 962
 963         /* We'd like to show at least 15 tasks; be less picky if we have fewer */
 964         if (count < 15)
 965                 count = determine_display_tasks(TIME_THRESH / 10);
 966
 967         open_svg(filename, numcpus, count, first_time, last_time);
 968
 969         svg_time_grid();
 970         svg_legenda();
 971
 972         for (i = 0; i < numcpus; i++)
 973                 svg_cpu_box(i, max_freq, turbo_frequency);
 974
 975         draw_cpu_usage();
 976         draw_process_bars();
 977         draw_c_p_states();
 978         draw_wakeups();
 979
 980         svg_close();
 981 }
 982
 983 static struct perf_tool perf_timechart = {
 984         .comm                   = process_comm_event,
 985         .fork                   = process_fork_event,
 986         .exit                   = process_exit_event,
 987         .sample                 = process_sample_event,
 988         .ordered_samples        = true,
 989 };
 990
 991 static int __cmd_timechart(void)
 992 {
 993         struct perf_session *session = perf_session__new(input_name, O_RDONLY,
 994                                                          0, false, &perf_timechart);
 995         int ret = -EINVAL;
 996
 997         if (session == NULL)
 998                 return -ENOMEM;
 999
1000         if (!perf_session__has_traces(session, "timechart record"))
1001                 goto out_delete;
1002
1003         ret = perf_session__process_events(session, &perf_timechart);
1004         if (ret)
1005                 goto out_delete;
1006
1007         end_sample_processing();
1008
1009         sort_pids();
1010
1011         write_svg_file(output_name);
1012
1013         pr_info("Written %2.1f seconds of trace to %s.\n",
1014                 (last_time - first_time) / 1000000000.0, output_name);
1015 out_delete:
1016         perf_session__delete(session);
1017         return ret;
1018 }
1019
1020 static const char * const timechart_usage[] = {
1021         "perf timechart [<options>] {record}",
1022         NULL
1023 };
1024
1025 #ifdef SUPPORT_OLD_POWER_EVENTS
1026 static const char * const record_old_args[] = {
1027         "record",
1028         "-a",
1029         "-R",
1030         "-f",
1031         "-c", "1",
1032         "-e", "power:power_start",
1033         "-e", "power:power_end",
1034         "-e", "power:power_frequency",
1035         "-e", "sched:sched_wakeup",
1036         "-e", "sched:sched_switch",
1037 };
1038 #endif
1039
1040 static const char * const record_new_args[] = {
1041         "record",
1042         "-a",
1043         "-R",
1044         "-f",
1045         "-c", "1",
1046         "-e", "power:cpu_frequency",
1047         "-e", "power:cpu_idle",
1048         "-e", "sched:sched_wakeup",
1049         "-e", "sched:sched_switch",
1050 };
1051
1052 static int __cmd_record(int argc, const char **argv)
1053 {
1054         unsigned int rec_argc, i, j;
1055         const char **rec_argv;
1056         const char * const *record_args = record_new_args;
1057         unsigned int record_elems = ARRAY_SIZE(record_new_args);
1058
1059 #ifdef SUPPORT_OLD_POWER_EVENTS
1060         if (!is_valid_tracepoint("power:cpu_idle") &&
1061             is_valid_tracepoint("power:power_start")) {
1062                 use_old_power_events = 1;
1063                 record_args = record_old_args;
1064                 record_elems = ARRAY_SIZE(record_old_args);
1065         }
1066 #endif
1067
1068         rec_argc = record_elems + argc - 1;
1069         rec_argv = calloc(rec_argc + 1, sizeof(char *));
1070
1071         if (rec_argv == NULL)
1072                 return -ENOMEM;
1073
1074         for (i = 0; i < record_elems; i++)
1075                 rec_argv[i] = strdup(record_args[i]);
1076
1077         for (j = 1; j < (unsigned int)argc; j++, i++)
1078                 rec_argv[i] = argv[j];
1079
1080         return cmd_record(i, rec_argv, NULL);
1081 }
1082
1083 static int
1084 parse_process(const struct option *opt __used, const char *arg, int __used unset)
1085 {
1086         if (arg)
1087                 add_process_filter(arg);
1088         return 0;
1089 }
1090
1091 static const struct option options[] = {
1092         OPT_STRING('i', "input", &input_name, "file",
1093                     "input file name"),
1094         OPT_STRING('o', "output", &output_name, "file",
1095                     "output file name"),
1096         OPT_INTEGER('w', "width", &svg_page_width,
1097                     "page width"),
1098         OPT_BOOLEAN('P', "power-only", &power_only,
1099                     "output power data only"),
1100         OPT_CALLBACK('p', "process", NULL, "process",
1101                       "process selector. Pass a pid or process name.",
1102                        parse_process),
1103         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1104                     "Look for files with symbols relative to this directory"),
1105         OPT_END()
1106 };
1107
1108
1109 int cmd_timechart(int argc, const char **argv, const char *prefix __used)
1110 {
1111         argc = parse_options(argc, argv, options, timechart_usage,
1112                         PARSE_OPT_STOP_AT_NON_OPTION);
1113
1114         symbol__init();
1115
1116         if (argc && !strncmp(argv[0], "rec", 3))
1117                 return __cmd_record(argc, argv);
1118         else if (argc)
1119                 usage_with_options(timechart_usage, options);
1120
1121         setup_pager();
1122
1123         return __cmd_timechart();
1124 }