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 <linux/rbtree.h>
  23 #include "util/symbol.h"
  24 #include "util/string.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/svghelper.h"
  33
  34 static char             const *input_name = "perf.data";
  35 static char             const *output_name = "output.svg";
  36
  37
  38 static unsigned long    page_size;
  39 static unsigned long    mmap_window = 32;
  40 static u64              sample_type;
  41
  42 static unsigned int     numcpus;
  43 static u64              min_freq;       /* Lowest CPU frequency seen */
  44 static u64              max_freq;       /* Highest CPU frequency seen */
  45 static u64              turbo_frequency;
  46
  47 static u64              first_time, last_time;
  48
  49
  50 static struct perf_header       *header;
  51
  52 struct per_pid;
  53 struct per_pidcomm;
  54
  55 struct cpu_sample;
  56 struct power_event;
  57 struct wake_event;
  58
  59 struct sample_wrapper;
  60
  61 /*
  62  * Datastructure layout:
  63  * We keep an list of "pid"s, matching the kernels notion of a task struct.
  64  * Each "pid" entry, has a list of "comm"s.
  65  *      this is because we want to track different programs different, while
  66  *      exec will reuse the original pid (by design).
  67  * Each comm has a list of samples that will be used to draw
  68  * final graph.
  69  */
  70
  71 struct per_pid {
  72         struct per_pid *next;
  73
  74         int             pid;
  75         int             ppid;
  76
  77         u64             start_time;
  78         u64             end_time;
  79         u64             total_time;
  80         int             display;
  81
  82         struct per_pidcomm *all;
  83         struct per_pidcomm *current;
  84
  85         int painted;
  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 sample_wrapper *all_samples;
 153
 154 static struct per_pid *find_create_pid(int pid)
 155 {
 156         struct per_pid *cursor = all_data;
 157
 158         while (cursor) {
 159                 if (cursor->pid == pid)
 160                         return cursor;
 161                 cursor = cursor->next;
 162         }
 163         cursor = malloc(sizeof(struct per_pid));
 164         assert(cursor != NULL);
 165         memset(cursor, 0, sizeof(struct per_pid));
 166         cursor->pid = pid;
 167         cursor->next = all_data;
 168         all_data = cursor;
 169         return cursor;
 170 }
 171
 172 static void pid_set_comm(int pid, char *comm)
 173 {
 174         struct per_pid *p;
 175         struct per_pidcomm *c;
 176         p = find_create_pid(pid);
 177         c = p->all;
 178         while (c) {
 179                 if (c->comm && strcmp(c->comm, comm) == 0) {
 180                         p->current = c;
 181                         return;
 182                 }
 183                 if (!c->comm) {
 184                         c->comm = strdup(comm);
 185                         p->current = c;
 186                         return;
 187                 }
 188                 c = c->next;
 189         }
 190         c = malloc(sizeof(struct per_pidcomm));
 191         assert(c != NULL);
 192         memset(c, 0, sizeof(struct per_pidcomm));
 193         c->comm = strdup(comm);
 194         p->current = c;
 195         c->next = p->all;
 196         p->all = c;
 197 }
 198
 199 static void pid_fork(int pid, int ppid, u64 timestamp)
 200 {
 201         struct per_pid *p, *pp;
 202         p = find_create_pid(pid);
 203         pp = find_create_pid(ppid);
 204         p->ppid = ppid;
 205         if (pp->current && pp->current->comm && !p->current)
 206                 pid_set_comm(pid, pp->current->comm);
 207
 208         p->start_time = timestamp;
 209         if (p->current) {
 210                 p->current->start_time = timestamp;
 211                 p->current->state_since = timestamp;
 212         }
 213 }
 214
 215 static void pid_exit(int pid, u64 timestamp)
 216 {
 217         struct per_pid *p;
 218         p = find_create_pid(pid);
 219         p->end_time = timestamp;
 220         if (p->current)
 221                 p->current->end_time = timestamp;
 222 }
 223
 224 static void
 225 pid_put_sample(int pid, int type, unsigned int cpu, u64 start, u64 end)
 226 {
 227         struct per_pid *p;
 228         struct per_pidcomm *c;
 229         struct cpu_sample *sample;
 230
 231         p = find_create_pid(pid);
 232         c = p->current;
 233         if (!c) {
 234                 c = malloc(sizeof(struct per_pidcomm));
 235                 assert(c != NULL);
 236                 memset(c, 0, sizeof(struct per_pidcomm));
 237                 p->current = c;
 238                 c->next = p->all;
 239                 p->all = c;
 240         }
 241
 242         sample = malloc(sizeof(struct cpu_sample));
 243         assert(sample != NULL);
 244         memset(sample, 0, sizeof(struct cpu_sample));
 245         sample->start_time = start;
 246         sample->end_time = end;
 247         sample->type = type;
 248         sample->next = c->samples;
 249         sample->cpu = cpu;
 250         c->samples = sample;
 251
 252         if (sample->type == TYPE_RUNNING && end > start && start > 0) {
 253                 c->total_time += (end-start);
 254                 p->total_time += (end-start);
 255         }
 256
 257         if (c->start_time == 0 || c->start_time > start)
 258                 c->start_time = start;
 259         if (p->start_time == 0 || p->start_time > start)
 260                 p->start_time = start;
 261
 262         if (cpu > numcpus)
 263                 numcpus = cpu;
 264 }
 265
 266 #define MAX_CPUS 4096
 267
 268 static u64 cpus_cstate_start_times[MAX_CPUS];
 269 static int cpus_cstate_state[MAX_CPUS];
 270 static u64 cpus_pstate_start_times[MAX_CPUS];
 271 static u64 cpus_pstate_state[MAX_CPUS];
 272
 273 static int
 274 process_comm_event(event_t *event)
 275 {
 276         pid_set_comm(event->comm.pid, event->comm.comm);
 277         return 0;
 278 }
 279 static int
 280 process_fork_event(event_t *event)
 281 {
 282         pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
 283         return 0;
 284 }
 285
 286 static int
 287 process_exit_event(event_t *event)
 288 {
 289         pid_exit(event->fork.pid, event->fork.time);
 290         return 0;
 291 }
 292
 293 struct trace_entry {
 294         u32                     size;
 295         unsigned short          type;
 296         unsigned char           flags;
 297         unsigned char           preempt_count;
 298         int                     pid;
 299         int                     tgid;
 300 };
 301
 302 struct power_entry {
 303         struct trace_entry te;
 304         s64     type;
 305         s64     value;
 306 };
 307
 308 #define TASK_COMM_LEN 16
 309 struct wakeup_entry {
 310         struct trace_entry te;
 311         char comm[TASK_COMM_LEN];
 312         int   pid;
 313         int   prio;
 314         int   success;
 315 };
 316
 317 /*
 318  * trace_flag_type is an enumeration that holds different
 319  * states when a trace occurs. These are:
 320  *  IRQS_OFF            - interrupts were disabled
 321  *  IRQS_NOSUPPORT      - arch does not support irqs_disabled_flags
 322  *  NEED_RESCED         - reschedule is requested
 323  *  HARDIRQ             - inside an interrupt handler
 324  *  SOFTIRQ             - inside a softirq handler
 325  */
 326 enum trace_flag_type {
 327         TRACE_FLAG_IRQS_OFF             = 0x01,
 328         TRACE_FLAG_IRQS_NOSUPPORT       = 0x02,
 329         TRACE_FLAG_NEED_RESCHED         = 0x04,
 330         TRACE_FLAG_HARDIRQ              = 0x08,
 331         TRACE_FLAG_SOFTIRQ              = 0x10,
 332 };
 333
 334
 335
 336 struct sched_switch {
 337         struct trace_entry te;
 338         char prev_comm[TASK_COMM_LEN];
 339         int  prev_pid;
 340         int  prev_prio;
 341         long prev_state; /* Arjan weeps. */
 342         char next_comm[TASK_COMM_LEN];
 343         int  next_pid;
 344         int  next_prio;
 345 };
 346
 347 static void c_state_start(int cpu, u64 timestamp, int state)
 348 {
 349         cpus_cstate_start_times[cpu] = timestamp;
 350         cpus_cstate_state[cpu] = state;
 351 }
 352
 353 static void c_state_end(int cpu, u64 timestamp)
 354 {
 355         struct power_event *pwr;
 356         pwr = malloc(sizeof(struct power_event));
 357         if (!pwr)
 358                 return;
 359         memset(pwr, 0, sizeof(struct power_event));
 360
 361         pwr->state = cpus_cstate_state[cpu];
 362         pwr->start_time = cpus_cstate_start_times[cpu];
 363         pwr->end_time = timestamp;
 364         pwr->cpu = cpu;
 365         pwr->type = CSTATE;
 366         pwr->next = power_events;
 367
 368         power_events = pwr;
 369 }
 370
 371 static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 372 {
 373         struct power_event *pwr;
 374         pwr = malloc(sizeof(struct power_event));
 375
 376         if (new_freq > 8000000) /* detect invalid data */
 377                 return;
 378
 379         if (!pwr)
 380                 return;
 381         memset(pwr, 0, sizeof(struct power_event));
 382
 383         pwr->state = cpus_pstate_state[cpu];
 384         pwr->start_time = cpus_pstate_start_times[cpu];
 385         pwr->end_time = timestamp;
 386         pwr->cpu = cpu;
 387         pwr->type = PSTATE;
 388         pwr->next = power_events;
 389
 390         if (!pwr->start_time)
 391                 pwr->start_time = first_time;
 392
 393         power_events = pwr;
 394
 395         cpus_pstate_state[cpu] = new_freq;
 396         cpus_pstate_start_times[cpu] = timestamp;
 397
 398         if ((u64)new_freq > max_freq)
 399                 max_freq = new_freq;
 400
 401         if (new_freq < min_freq || min_freq == 0)
 402                 min_freq = new_freq;
 403
 404         if (new_freq == max_freq - 1000)
 405                         turbo_frequency = max_freq;
 406 }
 407
 408 static void
 409 sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
 410 {
 411         struct wake_event *we;
 412         struct per_pid *p;
 413         struct wakeup_entry *wake = (void *)te;
 414
 415         we = malloc(sizeof(struct wake_event));
 416         if (!we)
 417                 return;
 418
 419         memset(we, 0, sizeof(struct wake_event));
 420         we->time = timestamp;
 421         we->waker = pid;
 422
 423         if ((te->flags & TRACE_FLAG_HARDIRQ) || (te->flags & TRACE_FLAG_SOFTIRQ))
 424                 we->waker = -1;
 425
 426         we->wakee = wake->pid;
 427         we->next = wake_events;
 428         wake_events = we;
 429         p = find_create_pid(we->wakee);
 430
 431         if (p && p->current && p->current->state == TYPE_NONE) {
 432                 p->current->state_since = timestamp;
 433                 p->current->state = TYPE_WAITING;
 434         }
 435         if (p && p->current && p->current->state == TYPE_BLOCKED) {
 436                 pid_put_sample(p->pid, p->current->state, cpu, p->current->state_since, timestamp);
 437                 p->current->state_since = timestamp;
 438                 p->current->state = TYPE_WAITING;
 439         }
 440 }
 441
 442 static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
 443 {
 444         struct per_pid *p = NULL, *prev_p;
 445         struct sched_switch *sw = (void *)te;
 446
 447
 448         prev_p = find_create_pid(sw->prev_pid);
 449
 450         p = find_create_pid(sw->next_pid);
 451
 452         if (prev_p->current && prev_p->current->state != TYPE_NONE)
 453                 pid_put_sample(sw->prev_pid, TYPE_RUNNING, cpu, prev_p->current->state_since, timestamp);
 454         if (p && p->current) {
 455                 if (p->current->state != TYPE_NONE)
 456                         pid_put_sample(sw->next_pid, p->current->state, cpu, p->current->state_since, timestamp);
 457
 458                         p->current->state_since = timestamp;
 459                         p->current->state = TYPE_RUNNING;
 460         }
 461
 462         if (prev_p->current) {
 463                 prev_p->current->state = TYPE_NONE;
 464                 prev_p->current->state_since = timestamp;
 465                 if (sw->prev_state & 2)
 466                         prev_p->current->state = TYPE_BLOCKED;
 467                 if (sw->prev_state == 0)
 468                         prev_p->current->state = TYPE_WAITING;
 469         }
 470 }
 471
 472
 473 static int
 474 process_sample_event(event_t *event)
 475 {
 476         int cursor = 0;
 477         u64 addr = 0;
 478         u64 stamp = 0;
 479         u32 cpu = 0;
 480         u32 pid = 0;
 481         struct trace_entry *te;
 482
 483         if (sample_type & PERF_SAMPLE_IP)
 484                 cursor++;
 485
 486         if (sample_type & PERF_SAMPLE_TID) {
 487                 pid = event->sample.array[cursor]>>32;
 488                 cursor++;
 489         }
 490         if (sample_type & PERF_SAMPLE_TIME) {
 491                 stamp = event->sample.array[cursor++];
 492
 493                 if (!first_time || first_time > stamp)
 494                         first_time = stamp;
 495                 if (last_time < stamp)
 496                         last_time = stamp;
 497
 498         }
 499         if (sample_type & PERF_SAMPLE_ADDR)
 500                 addr = event->sample.array[cursor++];
 501         if (sample_type & PERF_SAMPLE_ID)
 502                 cursor++;
 503         if (sample_type & PERF_SAMPLE_STREAM_ID)
 504                 cursor++;
 505         if (sample_type & PERF_SAMPLE_CPU)
 506                 cpu = event->sample.array[cursor++] & 0xFFFFFFFF;
 507         if (sample_type & PERF_SAMPLE_PERIOD)
 508                 cursor++;
 509
 510         te = (void *)&event->sample.array[cursor];
 511
 512         if (sample_type & PERF_SAMPLE_RAW && te->size > 0) {
 513                 char *event_str;
 514                 struct power_entry *pe;
 515
 516                 pe = (void *)te;
 517
 518                 event_str = perf_header__find_event(te->type);
 519
 520                 if (!event_str)
 521                         return 0;
 522
 523                 if (strcmp(event_str, "power:power_start") == 0)
 524                         c_state_start(cpu, stamp, pe->value);
 525
 526                 if (strcmp(event_str, "power:power_end") == 0)
 527                         c_state_end(cpu, stamp);
 528
 529                 if (strcmp(event_str, "power:power_frequency") == 0)
 530                         p_state_change(cpu, stamp, pe->value);
 531
 532                 if (strcmp(event_str, "sched:sched_wakeup") == 0)
 533                         sched_wakeup(cpu, stamp, pid, te);
 534
 535                 if (strcmp(event_str, "sched:sched_switch") == 0)
 536                         sched_switch(cpu, stamp, te);
 537         }
 538         return 0;
 539 }
 540
 541 /*
 542  * After the last sample we need to wrap up the current C/P state
 543  * and close out each CPU for these.
 544  */
 545 static void end_sample_processing(void)
 546 {
 547         u64 cpu;
 548         struct power_event *pwr;
 549
 550         for (cpu = 0; cpu < numcpus; cpu++) {
 551                 pwr = malloc(sizeof(struct power_event));
 552                 if (!pwr)
 553                         return;
 554                 memset(pwr, 0, sizeof(struct power_event));
 555
 556                 /* C state */
 557 #if 0
 558                 pwr->state = cpus_cstate_state[cpu];
 559                 pwr->start_time = cpus_cstate_start_times[cpu];
 560                 pwr->end_time = last_time;
 561                 pwr->cpu = cpu;
 562                 pwr->type = CSTATE;
 563                 pwr->next = power_events;
 564
 565                 power_events = pwr;
 566 #endif
 567                 /* P state */
 568
 569                 pwr = malloc(sizeof(struct power_event));
 570                 if (!pwr)
 571                         return;
 572                 memset(pwr, 0, sizeof(struct power_event));
 573
 574                 pwr->state = cpus_pstate_state[cpu];
 575                 pwr->start_time = cpus_pstate_start_times[cpu];
 576                 pwr->end_time = last_time;
 577                 pwr->cpu = cpu;
 578                 pwr->type = PSTATE;
 579                 pwr->next = power_events;
 580
 581                 if (!pwr->start_time)
 582                         pwr->start_time = first_time;
 583                 if (!pwr->state)
 584                         pwr->state = min_freq;
 585                 power_events = pwr;
 586         }
 587 }
 588
 589 static u64 sample_time(event_t *event)
 590 {
 591         int cursor;
 592
 593         cursor = 0;
 594         if (sample_type & PERF_SAMPLE_IP)
 595                 cursor++;
 596         if (sample_type & PERF_SAMPLE_TID)
 597                 cursor++;
 598         if (sample_type & PERF_SAMPLE_TIME)
 599                 return event->sample.array[cursor];
 600         return 0;
 601 }
 602
 603
 604 /*
 605  * We first queue all events, sorted backwards by insertion.
 606  * The order will get flipped later.
 607  */
 608 static int
 609 queue_sample_event(event_t *event)
 610 {
 611         struct sample_wrapper *copy, *prev;
 612         int size;
 613
 614         size = event->sample.header.size + sizeof(struct sample_wrapper) + 8;
 615
 616         copy = malloc(size);
 617         if (!copy)
 618                 return 1;
 619
 620         memset(copy, 0, size);
 621
 622         copy->next = NULL;
 623         copy->timestamp = sample_time(event);
 624
 625         memcpy(&copy->data, event, event->sample.header.size);
 626
 627         /* insert in the right place in the list */
 628
 629         if (!all_samples) {
 630                 /* first sample ever */
 631                 all_samples = copy;
 632                 return 0;
 633         }
 634
 635         if (all_samples->timestamp < copy->timestamp) {
 636                 /* insert at the head of the list */
 637                 copy->next = all_samples;
 638                 all_samples = copy;
 639                 return 0;
 640         }
 641
 642         prev = all_samples;
 643         while (prev->next) {
 644                 if (prev->next->timestamp < copy->timestamp) {
 645                         copy->next = prev->next;
 646                         prev->next = copy;
 647                         return 0;
 648                 }
 649                 prev = prev->next;
 650         }
 651         /* insert at the end of the list */
 652         prev->next = copy;
 653
 654         return 0;
 655 }
 656
 657 static void sort_queued_samples(void)
 658 {
 659         struct sample_wrapper *cursor, *next;
 660
 661         cursor = all_samples;
 662         all_samples = NULL;
 663
 664         while (cursor) {
 665                 next = cursor->next;
 666                 cursor->next = all_samples;
 667                 all_samples = cursor;
 668                 cursor = next;
 669         }
 670 }
 671
 672 /*
 673  * Sort the pid datastructure
 674  */
 675 static void sort_pids(void)
 676 {
 677         struct per_pid *new_list, *p, *cursor, *prev;
 678         /* sort by ppid first, then by pid, lowest to highest */
 679
 680         new_list = NULL;
 681
 682         while (all_data) {
 683                 p = all_data;
 684                 all_data = p->next;
 685                 p->next = NULL;
 686
 687                 if (new_list == NULL) {
 688                         new_list = p;
 689                         p->next = NULL;
 690                         continue;
 691                 }
 692                 prev = NULL;
 693                 cursor = new_list;
 694                 while (cursor) {
 695                         if (cursor->ppid > p->ppid ||
 696                                 (cursor->ppid == p->ppid && cursor->pid > p->pid)) {
 697                                 /* must insert before */
 698                                 if (prev) {
 699                                         p->next = prev->next;
 700                                         prev->next = p;
 701                                         cursor = NULL;
 702                                         continue;
 703                                 } else {
 704                                         p->next = new_list;
 705                                         new_list = p;
 706                                         cursor = NULL;
 707                                         continue;
 708                                 }
 709                         }
 710
 711                         prev = cursor;
 712                         cursor = cursor->next;
 713                         if (!cursor)
 714                                 prev->next = p;
 715                 }
 716         }
 717         all_data = new_list;
 718 }
 719
 720
 721 static void draw_c_p_states(void)
 722 {
 723         struct power_event *pwr;
 724         pwr = power_events;
 725
 726         /*
 727          * two pass drawing so that the P state bars are on top of the C state blocks
 728          */
 729         while (pwr) {
 730                 if (pwr->type == CSTATE)
 731                         svg_cstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 732                 pwr = pwr->next;
 733         }
 734
 735         pwr = power_events;
 736         while (pwr) {
 737                 if (pwr->type == PSTATE) {
 738                         if (!pwr->state)
 739                                 pwr->state = min_freq;
 740                         svg_pstate(pwr->cpu, pwr->start_time, pwr->end_time, pwr->state);
 741                 }
 742                 pwr = pwr->next;
 743         }
 744 }
 745
 746 static void draw_wakeups(void)
 747 {
 748         struct wake_event *we;
 749         struct per_pid *p;
 750         struct per_pidcomm *c;
 751
 752         we = wake_events;
 753         while (we) {
 754                 int from = 0, to = 0;
 755                 char *task_from = NULL, *task_to = NULL;
 756
 757                 /* locate the column of the waker and wakee */
 758                 p = all_data;
 759                 while (p) {
 760                         if (p->pid == we->waker || p->pid == we->wakee) {
 761                                 c = p->all;
 762                                 while (c) {
 763                                         if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
 764                                                 if (p->pid == we->waker) {
 765                                                         from = c->Y;
 766                                                         task_from = c->comm;
 767                                                 }
 768                                                 if (p->pid == we->wakee) {
 769                                                         to = c->Y;
 770                                                         task_to = c->comm;
 771                                                 }
 772                                         }
 773                                         c = c->next;
 774                                 }
 775                         }
 776                         p = p->next;
 777                 }
 778
 779                 if (we->waker == -1)
 780                         svg_interrupt(we->time, to);
 781                 else if (from && to && abs(from - to) == 1)
 782                         svg_wakeline(we->time, from, to);
 783                 else
 784                         svg_partial_wakeline(we->time, from, task_from, to, task_to);
 785                 we = we->next;
 786         }
 787 }
 788
 789 static void draw_cpu_usage(void)
 790 {
 791         struct per_pid *p;
 792         struct per_pidcomm *c;
 793         struct cpu_sample *sample;
 794         p = all_data;
 795         while (p) {
 796                 c = p->all;
 797                 while (c) {
 798                         sample = c->samples;
 799                         while (sample) {
 800                                 if (sample->type == TYPE_RUNNING)
 801                                         svg_process(sample->cpu, sample->start_time, sample->end_time, "sample", c->comm);
 802
 803                                 sample = sample->next;
 804                         }
 805                         c = c->next;
 806                 }
 807                 p = p->next;
 808         }
 809 }
 810
 811 static void draw_process_bars(void)
 812 {
 813         struct per_pid *p;
 814         struct per_pidcomm *c;
 815         struct cpu_sample *sample;
 816         int Y = 0;
 817
 818         Y = 2 * numcpus + 2;
 819
 820         p = all_data;
 821         while (p) {
 822                 c = p->all;
 823                 while (c) {
 824                         if (!c->display) {
 825                                 c->Y = 0;
 826                                 c = c->next;
 827                                 continue;
 828                         }
 829
 830                         svg_box(Y, c->start_time, c->end_time, "process");
 831                         sample = c->samples;
 832                         while (sample) {
 833                                 if (sample->type == TYPE_RUNNING)
 834                                         svg_sample(Y, sample->cpu, sample->start_time, sample->end_time);
 835                                 if (sample->type == TYPE_BLOCKED)
 836                                         svg_box(Y, sample->start_time, sample->end_time, "blocked");
 837                                 if (sample->type == TYPE_WAITING)
 838                                         svg_waiting(Y, sample->start_time, sample->end_time);
 839                                 sample = sample->next;
 840                         }
 841
 842                         if (c->comm) {
 843                                 char comm[256];
 844                                 if (c->total_time > 5000000000) /* 5 seconds */
 845                                         sprintf(comm, "%s:%i (%2.2fs)", c->comm, p->pid, c->total_time / 1000000000.0);
 846                                 else
 847                                         sprintf(comm, "%s:%i (%3.1fms)", c->comm, p->pid, c->total_time / 1000000.0);
 848
 849                                 svg_text(Y, c->start_time, comm);
 850                         }
 851                         c->Y = Y;
 852                         Y++;
 853                         c = c->next;
 854                 }
 855                 p = p->next;
 856         }
 857 }
 858
 859 static int determine_display_tasks(u64 threshold)
 860 {
 861         struct per_pid *p;
 862         struct per_pidcomm *c;
 863         int count = 0;
 864
 865         p = all_data;
 866         while (p) {
 867                 p->display = 0;
 868                 if (p->start_time == 1)
 869                         p->start_time = first_time;
 870
 871                 /* no exit marker, task kept running to the end */
 872                 if (p->end_time == 0)
 873                         p->end_time = last_time;
 874                 if (p->total_time >= threshold)
 875                         p->display = 1;
 876
 877                 c = p->all;
 878
 879                 while (c) {
 880                         c->display = 0;
 881
 882                         if (c->start_time == 1)
 883                                 c->start_time = first_time;
 884
 885                         if (c->total_time >= threshold) {
 886                                 c->display = 1;
 887                                 count++;
 888                         }
 889
 890                         if (c->end_time == 0)
 891                                 c->end_time = last_time;
 892
 893                         c = c->next;
 894                 }
 895                 p = p->next;
 896         }
 897         return count;
 898 }
 899
 900
 901
 902 #define TIME_THRESH 10000000
 903
 904 static void write_svg_file(const char *filename)
 905 {
 906         u64 i;
 907         int count;
 908
 909         numcpus++;
 910
 911
 912         count = determine_display_tasks(TIME_THRESH);
 913
 914         /* We'd like to show at least 15 tasks; be less picky if we have fewer */
 915         if (count < 15)
 916                 count = determine_display_tasks(TIME_THRESH / 10);
 917
 918         open_svg(filename, numcpus, count, first_time, last_time);
 919
 920         svg_time_grid();
 921         svg_legenda();
 922
 923         for (i = 0; i < numcpus; i++)
 924                 svg_cpu_box(i, max_freq, turbo_frequency);
 925
 926         draw_cpu_usage();
 927         draw_process_bars();
 928         draw_c_p_states();
 929         draw_wakeups();
 930
 931         svg_close();
 932 }
 933
 934 static int
 935 process_event(event_t *event)
 936 {
 937
 938         switch (event->header.type) {
 939
 940         case PERF_RECORD_COMM:
 941                 return process_comm_event(event);
 942         case PERF_RECORD_FORK:
 943                 return process_fork_event(event);
 944         case PERF_RECORD_EXIT:
 945                 return process_exit_event(event);
 946         case PERF_RECORD_SAMPLE:
 947                 return queue_sample_event(event);
 948
 949         /*
 950          * We dont process them right now but they are fine:
 951          */
 952         case PERF_RECORD_MMAP:
 953         case PERF_RECORD_THROTTLE:
 954         case PERF_RECORD_UNTHROTTLE:
 955                 return 0;
 956
 957         default:
 958                 return -1;
 959         }
 960
 961         return 0;
 962 }
 963
 964 static void process_samples(void)
 965 {
 966         struct sample_wrapper *cursor;
 967         event_t *event;
 968
 969         sort_queued_samples();
 970
 971         cursor = all_samples;
 972         while (cursor) {
 973                 event = (void *)&cursor->data;
 974                 cursor = cursor->next;
 975                 process_sample_event(event);
 976         }
 977 }
 978
 979
 980 static int __cmd_timechart(void)
 981 {
 982         int ret, rc = EXIT_FAILURE;
 983         unsigned long offset = 0;
 984         unsigned long head, shift;
 985         struct stat statbuf;
 986         event_t *event;
 987         uint32_t size;
 988         char *buf;
 989         int input;
 990
 991         input = open(input_name, O_RDONLY);
 992         if (input < 0) {
 993                 fprintf(stderr, " failed to open file: %s", input_name);
 994                 if (!strcmp(input_name, "perf.data"))
 995                         fprintf(stderr, "  (try 'perf record' first)");
 996                 fprintf(stderr, "\n");
 997                 exit(-1);
 998         }
 999
1000         ret = fstat(input, &statbuf);
1001         if (ret < 0) {
1002                 perror("failed to stat file");
1003                 exit(-1);
1004         }
1005
1006         if (!statbuf.st_size) {
1007                 fprintf(stderr, "zero-sized file, nothing to do!\n");
1008                 exit(0);
1009         }
1010
1011         header = perf_header__read(input);
1012         head = header->data_offset;
1013
1014         sample_type = perf_header__sample_type(header);
1015
1016         shift = page_size * (head / page_size);
1017         offset += shift;
1018         head -= shift;
1019
1020 remap:
1021         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
1022                            MAP_SHARED, input, offset);
1023         if (buf == MAP_FAILED) {
1024                 perror("failed to mmap file");
1025                 exit(-1);
1026         }
1027
1028 more:
1029         event = (event_t *)(buf + head);
1030
1031         size = event->header.size;
1032         if (!size)
1033                 size = 8;
1034
1035         if (head + event->header.size >= page_size * mmap_window) {
1036                 int ret2;
1037
1038                 shift = page_size * (head / page_size);
1039
1040                 ret2 = munmap(buf, page_size * mmap_window);
1041                 assert(ret2 == 0);
1042
1043                 offset += shift;
1044                 head -= shift;
1045                 goto remap;
1046         }
1047
1048         size = event->header.size;
1049
1050         if (!size || process_event(event) < 0) {
1051
1052                 printf("%p [%p]: skipping unknown header type: %d\n",
1053                         (void *)(offset + head),
1054                         (void *)(long)(event->header.size),
1055                         event->header.type);
1056
1057                 /*
1058                  * assume we lost track of the stream, check alignment, and
1059                  * increment a single u64 in the hope to catch on again 'soon'.
1060                  */
1061
1062                 if (unlikely(head & 7))
1063                         head &= ~7ULL;
1064
1065                 size = 8;
1066         }
1067
1068         head += size;
1069
1070         if (offset + head >= header->data_offset + header->data_size)
1071                 goto done;
1072
1073         if (offset + head < (unsigned long)statbuf.st_size)
1074                 goto more;
1075
1076 done:
1077         rc = EXIT_SUCCESS;
1078         close(input);
1079
1080
1081         process_samples();
1082
1083         end_sample_processing();
1084
1085         sort_pids();
1086
1087         write_svg_file(output_name);
1088
1089         printf("Written %2.1f seconds of trace to %s.\n", (last_time - first_time) / 1000000000.0, output_name);
1090
1091         return rc;
1092 }
1093
1094 static const char * const timechart_usage[] = {
1095         "perf timechart [<options>] {record}",
1096         NULL
1097 };
1098
1099 static const char *record_args[] = {
1100         "record",
1101         "-a",
1102         "-R",
1103         "-M",
1104         "-f",
1105         "-c", "1",
1106         "-e", "power:power_start",
1107         "-e", "power:power_end",
1108         "-e", "power:power_frequency",
1109         "-e", "sched:sched_wakeup",
1110         "-e", "sched:sched_switch",
1111 };
1112
1113 static int __cmd_record(int argc, const char **argv)
1114 {
1115         unsigned int rec_argc, i, j;
1116         const char **rec_argv;
1117
1118         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1119         rec_argv = calloc(rec_argc + 1, sizeof(char *));
1120
1121         for (i = 0; i < ARRAY_SIZE(record_args); i++)
1122                 rec_argv[i] = strdup(record_args[i]);
1123
1124         for (j = 1; j < (unsigned int)argc; j++, i++)
1125                 rec_argv[i] = argv[j];
1126
1127         return cmd_record(i, rec_argv, NULL);
1128 }
1129
1130 static const struct option options[] = {
1131         OPT_STRING('i', "input", &input_name, "file",
1132                     "input file name"),
1133         OPT_STRING('o', "output", &output_name, "file",
1134                     "output file name"),
1135         OPT_INTEGER('w', "width", &svg_page_width,
1136                     "page width"),
1137         OPT_END()
1138 };
1139
1140
1141 int cmd_timechart(int argc, const char **argv, const char *prefix __used)
1142 {
1143         symbol__init();
1144
1145         page_size = getpagesize();
1146
1147         argc = parse_options(argc, argv, options, timechart_usage,
1148                         PARSE_OPT_STOP_AT_NON_OPTION);
1149
1150         if (argc && !strncmp(argv[0], "rec", 3))
1151                 return __cmd_record(argc, argv);
1152         else if (argc)
1153                 usage_with_options(timechart_usage, options);
1154
1155         setup_pager();
1156
1157         return __cmd_timechart();
1158 }