Pileus Git - ~andy/linux/blob - tools/perf/builtin-report.c

   1 /*
   2  * builtin-report.c
   3  *
   4  * Builtin report command: Analyze the perf.data input file,
   5  * look up and read DSOs and symbol information and display
   6  * a histogram of results, along various sorting keys.
   7  */
   8 #include "builtin.h"
   9
  10 #include "util/util.h"
  11
  12 #include "util/annotate.h"
  13 #include "util/color.h"
  14 #include <linux/list.h>
  15 #include "util/cache.h"
  16 #include <linux/rbtree.h>
  17 #include "util/symbol.h"
  18 #include "util/callchain.h"
  19 #include "util/strlist.h"
  20 #include "util/values.h"
  21
  22 #include "perf.h"
  23 #include "util/debug.h"
  24 #include "util/evlist.h"
  25 #include "util/evsel.h"
  26 #include "util/header.h"
  27 #include "util/session.h"
  28 #include "util/tool.h"
  29
  30 #include "util/parse-options.h"
  31 #include "util/parse-events.h"
  32
  33 #include "util/thread.h"
  34 #include "util/sort.h"
  35 #include "util/hist.h"
  36
  37 #include <linux/bitmap.h>
  38
  39 struct perf_report {
  40         struct perf_tool        tool;
  41         struct perf_session     *session;
  42         char const              *input_name;
  43         bool                    force, use_tui, use_stdio;
  44         bool                    hide_unresolved;
  45         bool                    dont_use_callchains;
  46         bool                    show_full_info;
  47         bool                    show_threads;
  48         bool                    inverted_callchain;
  49         struct perf_read_values show_threads_values;
  50         const char              *pretty_printing_style;
  51         symbol_filter_t         annotate_init;
  52         const char              *cpu_list;
  53         DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
  54 };
  55
  56 static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
  57                                       struct addr_location *al,
  58                                       struct perf_sample *sample,
  59                                       struct machine *machine)
  60 {
  61         struct symbol *parent = NULL;
  62         int err = 0;
  63         struct hist_entry *he;
  64
  65         if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) {
  66                 err = machine__resolve_callchain(machine, evsel, al->thread,
  67                                                  sample->callchain, &parent);
  68                 if (err)
  69                         return err;
  70         }
  71
  72         he = __hists__add_entry(&evsel->hists, al, parent, sample->period);
  73         if (he == NULL)
  74                 return -ENOMEM;
  75
  76         if (symbol_conf.use_callchain) {
  77                 err = callchain_append(he->callchain,
  78                                        &evsel->hists.callchain_cursor,
  79                                        sample->period);
  80                 if (err)
  81                         return err;
  82         }
  83         /*
  84          * Only in the newt browser we are doing integrated annotation,
  85          * so we don't allocated the extra space needed because the stdio
  86          * code will not use it.
  87          */
  88         if (al->sym != NULL && use_browser > 0) {
  89                 struct annotation *notes = symbol__annotation(he->ms.sym);
  90
  91                 assert(evsel != NULL);
  92
  93                 err = -ENOMEM;
  94                 if (notes->src == NULL && symbol__alloc_hist(he->ms.sym) < 0)
  95                         goto out;
  96
  97                 err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
  98         }
  99
 100         evsel->hists.stats.total_period += sample->period;
 101         hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
 102 out:
 103         return err;
 104 }
 105
 106
 107 static int process_sample_event(struct perf_tool *tool,
 108                                 union perf_event *event,
 109                                 struct perf_sample *sample,
 110                                 struct perf_evsel *evsel,
 111                                 struct machine *machine)
 112 {
 113         struct perf_report *rep = container_of(tool, struct perf_report, tool);
 114         struct addr_location al;
 115
 116         if (perf_event__preprocess_sample(event, machine, &al, sample,
 117                                           rep->annotate_init) < 0) {
 118                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 119                         event->header.type);
 120                 return -1;
 121         }
 122
 123         if (al.filtered || (rep->hide_unresolved && al.sym == NULL))
 124                 return 0;
 125
 126         if (rep->cpu_list && !test_bit(sample->cpu, rep->cpu_bitmap))
 127                 return 0;
 128
 129         if (al.map != NULL)
 130                 al.map->dso->hit = 1;
 131
 132         if (perf_evsel__add_hist_entry(evsel, &al, sample, machine)) {
 133                 pr_debug("problem incrementing symbol period, skipping event\n");
 134                 return -1;
 135         }
 136
 137         return 0;
 138 }
 139
 140 static int process_read_event(struct perf_tool *tool,
 141                               union perf_event *event,
 142                               struct perf_sample *sample __used,
 143                               struct perf_evsel *evsel,
 144                               struct machine *machine __used)
 145 {
 146         struct perf_report *rep = container_of(tool, struct perf_report, tool);
 147
 148         if (rep->show_threads) {
 149                 const char *name = evsel ? event_name(evsel) : "unknown";
 150                 perf_read_values_add_value(&rep->show_threads_values,
 151                                            event->read.pid, event->read.tid,
 152                                            event->read.id,
 153                                            name,
 154                                            event->read.value);
 155         }
 156
 157         dump_printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
 158                     evsel ? event_name(evsel) : "FAIL",
 159                     event->read.value);
 160
 161         return 0;
 162 }
 163
 164 static int perf_report__setup_sample_type(struct perf_report *rep)
 165 {
 166         struct perf_session *self = rep->session;
 167
 168         if (!(self->sample_type & PERF_SAMPLE_CALLCHAIN)) {
 169                 if (sort__has_parent) {
 170                         ui__warning("Selected --sort parent, but no "
 171                                     "callchain data. Did you call "
 172                                     "'perf record' without -g?\n");
 173                         return -EINVAL;
 174                 }
 175                 if (symbol_conf.use_callchain) {
 176                         ui__warning("Selected -g but no callchain data. Did "
 177                                     "you call 'perf record' without -g?\n");
 178                         return -1;
 179                 }
 180         } else if (!rep->dont_use_callchains &&
 181                    callchain_param.mode != CHAIN_NONE &&
 182                    !symbol_conf.use_callchain) {
 183                         symbol_conf.use_callchain = true;
 184                         if (callchain_register_param(&callchain_param) < 0) {
 185                                 ui__warning("Can't register callchain "
 186                                             "params.\n");
 187                                 return -EINVAL;
 188                         }
 189         }
 190
 191         return 0;
 192 }
 193
 194 extern volatile int session_done;
 195
 196 static void sig_handler(int sig __used)
 197 {
 198         session_done = 1;
 199 }
 200
 201 static size_t hists__fprintf_nr_sample_events(struct hists *self,
 202                                               const char *evname, FILE *fp)
 203 {
 204         size_t ret;
 205         char unit;
 206         unsigned long nr_events = self->stats.nr_events[PERF_RECORD_SAMPLE];
 207
 208         nr_events = convert_unit(nr_events, &unit);
 209         ret = fprintf(fp, "# Events: %lu%c", nr_events, unit);
 210         if (evname != NULL)
 211                 ret += fprintf(fp, " %s", evname);
 212         return ret + fprintf(fp, "\n#\n");
 213 }
 214
 215 static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
 216                                          struct perf_report *rep,
 217                                          const char *help)
 218 {
 219         struct perf_evsel *pos;
 220
 221         list_for_each_entry(pos, &evlist->entries, node) {
 222                 struct hists *hists = &pos->hists;
 223                 const char *evname = event_name(pos);
 224
 225                 hists__fprintf_nr_sample_events(hists, evname, stdout);
 226                 hists__fprintf(hists, NULL, false, true, 0, 0, stdout);
 227                 fprintf(stdout, "\n\n");
 228         }
 229
 230         if (sort_order == default_sort_order &&
 231             parent_pattern == default_parent_pattern) {
 232                 fprintf(stdout, "#\n# (%s)\n#\n", help);
 233
 234                 if (rep->show_threads) {
 235                         bool style = !strcmp(rep->pretty_printing_style, "raw");
 236                         perf_read_values_display(stdout, &rep->show_threads_values,
 237                                                  style);
 238                         perf_read_values_destroy(&rep->show_threads_values);
 239                 }
 240         }
 241
 242         return 0;
 243 }
 244
 245 static int __cmd_report(struct perf_report *rep)
 246 {
 247         int ret = -EINVAL;
 248         u64 nr_samples;
 249         struct perf_session *session;
 250         struct perf_evsel *pos;
 251         struct map *kernel_map;
 252         struct kmap *kernel_kmap;
 253         const char *help = "For a higher level overview, try: perf report --sort comm,dso";
 254
 255         signal(SIGINT, sig_handler);
 256
 257         session = perf_session__new(rep->input_name, O_RDONLY,
 258                                     rep->force, false, &rep->tool);
 259         if (session == NULL)
 260                 return -ENOMEM;
 261
 262         rep->session = session;
 263
 264         if (rep->cpu_list) {
 265                 ret = perf_session__cpu_bitmap(session, rep->cpu_list,
 266                                                rep->cpu_bitmap);
 267                 if (ret)
 268                         goto out_delete;
 269         }
 270
 271         if (use_browser <= 0)
 272                 perf_session__fprintf_info(session, stdout, rep->show_full_info);
 273
 274         if (rep->show_threads)
 275                 perf_read_values_init(&rep->show_threads_values);
 276
 277         ret = perf_report__setup_sample_type(rep);
 278         if (ret)
 279                 goto out_delete;
 280
 281         ret = perf_session__process_events(session, &rep->tool);
 282         if (ret)
 283                 goto out_delete;
 284
 285         kernel_map = session->host_machine.vmlinux_maps[MAP__FUNCTION];
 286         kernel_kmap = map__kmap(kernel_map);
 287         if (kernel_map == NULL ||
 288             (kernel_map->dso->hit &&
 289              (kernel_kmap->ref_reloc_sym == NULL ||
 290               kernel_kmap->ref_reloc_sym->addr == 0))) {
 291                 const struct dso *kdso = kernel_map->dso;
 292
 293                 ui__warning(
 294 "Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
 295 "Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
 296 "Samples in kernel modules can't be resolved as well.\n\n",
 297                             RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION]) ?
 298 "As no suitable kallsyms nor vmlinux was found, kernel samples\n"
 299 "can't be resolved." :
 300 "If some relocation was applied (e.g. kexec) symbols may be misresolved.");
 301         }
 302
 303         if (dump_trace) {
 304                 perf_session__fprintf_nr_events(session, stdout);
 305                 goto out_delete;
 306         }
 307
 308         if (verbose > 3)
 309                 perf_session__fprintf(session, stdout);
 310
 311         if (verbose > 2)
 312                 perf_session__fprintf_dsos(session, stdout);
 313
 314         nr_samples = 0;
 315         list_for_each_entry(pos, &session->evlist->entries, node) {
 316                 struct hists *hists = &pos->hists;
 317
 318                 hists__collapse_resort(hists);
 319                 hists__output_resort(hists);
 320                 nr_samples += hists->stats.nr_events[PERF_RECORD_SAMPLE];
 321         }
 322
 323         if (nr_samples == 0) {
 324                 ui__warning("The %s file has no samples!\n", session->filename);
 325                 goto out_delete;
 326         }
 327
 328         if (use_browser > 0) {
 329                 perf_evlist__tui_browse_hists(session->evlist, help,
 330                                               NULL, NULL, 0);
 331         } else
 332                 perf_evlist__tty_browse_hists(session->evlist, rep, help);
 333
 334 out_delete:
 335         /*
 336          * Speed up the exit process, for large files this can
 337          * take quite a while.
 338          *
 339          * XXX Enable this when using valgrind or if we ever
 340          * librarize this command.
 341          *
 342          * Also experiment with obstacks to see how much speed
 343          * up we'll get here.
 344          *
 345          * perf_session__delete(session);
 346          */
 347         return ret;
 348 }
 349
 350 static int
 351 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
 352 {
 353         struct perf_report *rep = (struct perf_report *)opt->value;
 354         char *tok, *tok2;
 355         char *endptr;
 356
 357         /*
 358          * --no-call-graph
 359          */
 360         if (unset) {
 361                 rep->dont_use_callchains = true;
 362                 return 0;
 363         }
 364
 365         symbol_conf.use_callchain = true;
 366
 367         if (!arg)
 368                 return 0;
 369
 370         tok = strtok((char *)arg, ",");
 371         if (!tok)
 372                 return -1;
 373
 374         /* get the output mode */
 375         if (!strncmp(tok, "graph", strlen(arg)))
 376                 callchain_param.mode = CHAIN_GRAPH_ABS;
 377
 378         else if (!strncmp(tok, "flat", strlen(arg)))
 379                 callchain_param.mode = CHAIN_FLAT;
 380
 381         else if (!strncmp(tok, "fractal", strlen(arg)))
 382                 callchain_param.mode = CHAIN_GRAPH_REL;
 383
 384         else if (!strncmp(tok, "none", strlen(arg))) {
 385                 callchain_param.mode = CHAIN_NONE;
 386                 symbol_conf.use_callchain = false;
 387
 388                 return 0;
 389         }
 390
 391         else
 392                 return -1;
 393
 394         /* get the min percentage */
 395         tok = strtok(NULL, ",");
 396         if (!tok)
 397                 goto setup;
 398
 399         callchain_param.min_percent = strtod(tok, &endptr);
 400         if (tok == endptr)
 401                 return -1;
 402
 403         /* get the print limit */
 404         tok2 = strtok(NULL, ",");
 405         if (!tok2)
 406                 goto setup;
 407
 408         if (tok2[0] != 'c') {
 409                 callchain_param.print_limit = strtoul(tok2, &endptr, 0);
 410                 tok2 = strtok(NULL, ",");
 411                 if (!tok2)
 412                         goto setup;
 413         }
 414
 415         /* get the call chain order */
 416         if (!strcmp(tok2, "caller"))
 417                 callchain_param.order = ORDER_CALLER;
 418         else if (!strcmp(tok2, "callee"))
 419                 callchain_param.order = ORDER_CALLEE;
 420         else
 421                 return -1;
 422 setup:
 423         if (callchain_register_param(&callchain_param) < 0) {
 424                 fprintf(stderr, "Can't register callchain params\n");
 425                 return -1;
 426         }
 427         return 0;
 428 }
 429
 430 int cmd_report(int argc, const char **argv, const char *prefix __used)
 431 {
 432         struct stat st;
 433         char callchain_default_opt[] = "fractal,0.5,callee";
 434         const char * const report_usage[] = {
 435                 "perf report [<options>]",
 436                 NULL
 437         };
 438         struct perf_report report = {
 439                 .tool = {
 440                         .sample          = process_sample_event,
 441                         .mmap            = perf_event__process_mmap,
 442                         .comm            = perf_event__process_comm,
 443                         .exit            = perf_event__process_task,
 444                         .fork            = perf_event__process_task,
 445                         .lost            = perf_event__process_lost,
 446                         .read            = process_read_event,
 447                         .attr            = perf_event__process_attr,
 448                         .event_type      = perf_event__process_event_type,
 449                         .tracing_data    = perf_event__process_tracing_data,
 450                         .build_id        = perf_event__process_build_id,
 451                         .ordered_samples = true,
 452                         .ordering_requires_timestamps = true,
 453                 },
 454                 .pretty_printing_style   = "normal",
 455         };
 456         const struct option options[] = {
 457         OPT_STRING('i', "input", &report.input_name, "file",
 458                     "input file name"),
 459         OPT_INCR('v', "verbose", &verbose,
 460                     "be more verbose (show symbol address, etc)"),
 461         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 462                     "dump raw trace in ASCII"),
 463         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
 464                    "file", "vmlinux pathname"),
 465         OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
 466                    "file", "kallsyms pathname"),
 467         OPT_BOOLEAN('f', "force", &report.force, "don't complain, do it"),
 468         OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
 469                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
 470         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
 471                     "Show a column with the number of samples"),
 472         OPT_BOOLEAN('T', "threads", &report.show_threads,
 473                     "Show per-thread event counters"),
 474         OPT_STRING(0, "pretty", &report.pretty_printing_style, "key",
 475                    "pretty printing style key: normal raw"),
 476         OPT_BOOLEAN(0, "tui", &report.use_tui, "Use the TUI interface"),
 477         OPT_BOOLEAN(0, "stdio", &report.use_stdio,
 478                     "Use the stdio interface"),
 479         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
 480                    "sort by key(s): pid, comm, dso, symbol, parent"),
 481         OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
 482                     "Show sample percentage for different cpu modes"),
 483         OPT_STRING('p', "parent", &parent_pattern, "regex",
 484                    "regex filter to identify parent, see: '--sort parent'"),
 485         OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
 486                     "Only display entries with parent-match"),
 487         OPT_CALLBACK_DEFAULT('g', "call-graph", &report, "output_type,min_percent[,print_limit],call_order",
 488                      "Display callchains using output_type (graph, flat, fractal, or none) , min percent threshold, optional print limit and callchain order. "
 489                      "Default: fractal,0.5,callee", &parse_callchain_opt, callchain_default_opt),
 490         OPT_BOOLEAN('G', "inverted", &report.inverted_callchain,
 491                     "alias for inverted call graph"),
 492         OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
 493                    "only consider symbols in these dsos"),
 494         OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
 495                    "only consider symbols in these comms"),
 496         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
 497                    "only consider these symbols"),
 498         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
 499                    "width[,width...]",
 500                    "don't try to adjust column width, use these fixed values"),
 501         OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
 502                    "separator for columns, no spaces will be added between "
 503                    "columns '.' is reserved."),
 504         OPT_BOOLEAN('U', "hide-unresolved", &report.hide_unresolved,
 505                     "Only display entries resolved to a symbol"),
 506         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
 507                     "Look for files with symbols relative to this directory"),
 508         OPT_STRING('C', "cpu", &report.cpu_list, "cpu",
 509                    "list of cpus to profile"),
 510         OPT_BOOLEAN('I', "show-info", &report.show_full_info,
 511                     "Display extended information about perf.data file"),
 512         OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
 513                     "Interleave source code with assembly code (default)"),
 514         OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
 515                     "Display raw encoding of assembly instructions (default)"),
 516         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
 517                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
 518         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
 519                     "Show a column with the sum of periods"),
 520         OPT_END()
 521         };
 522
 523         argc = parse_options(argc, argv, options, report_usage, 0);
 524
 525         if (report.use_stdio)
 526                 use_browser = 0;
 527         else if (report.use_tui)
 528                 use_browser = 1;
 529
 530         if (report.inverted_callchain)
 531                 callchain_param.order = ORDER_CALLER;
 532
 533         if (!report.input_name || !strlen(report.input_name)) {
 534                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
 535                         report.input_name = "-";
 536                 else
 537                         report.input_name = "perf.data";
 538         }
 539
 540         if (strcmp(report.input_name, "-") != 0)
 541                 setup_browser(true);
 542         else
 543                 use_browser = 0;
 544
 545         /*
 546          * Only in the newt browser we are doing integrated annotation,
 547          * so don't allocate extra space that won't be used in the stdio
 548          * implementation.
 549          */
 550         if (use_browser > 0) {
 551                 symbol_conf.priv_size = sizeof(struct annotation);
 552                 report.annotate_init  = symbol__annotate_init;
 553                 /*
 554                  * For searching by name on the "Browse map details".
 555                  * providing it only in verbose mode not to bloat too
 556                  * much struct symbol.
 557                  */
 558                 if (verbose) {
 559                         /*
 560                          * XXX: Need to provide a less kludgy way to ask for
 561                          * more space per symbol, the u32 is for the index on
 562                          * the ui browser.
 563                          * See symbol__browser_index.
 564                          */
 565                         symbol_conf.priv_size += sizeof(u32);
 566                         symbol_conf.sort_by_name = true;
 567                 }
 568         }
 569
 570         if (symbol__init() < 0)
 571                 return -1;
 572
 573         setup_sorting(report_usage, options);
 574
 575         if (parent_pattern != default_parent_pattern) {
 576                 if (sort_dimension__add("parent") < 0)
 577                         return -1;
 578
 579                 /*
 580                  * Only show the parent fields if we explicitly
 581                  * sort that way. If we only use parent machinery
 582                  * for filtering, we don't want it.
 583                  */
 584                 if (!strstr(sort_order, "parent"))
 585                         sort_parent.elide = 1;
 586         } else
 587                 symbol_conf.exclude_other = false;
 588
 589         /*
 590          * Any (unrecognized) arguments left?
 591          */
 592         if (argc)
 593                 usage_with_options(report_usage, options);
 594
 595         sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
 596         sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
 597         sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
 598
 599         return __cmd_report(&report);
 600 }