tools/perf/builtin-timechart.c

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