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/color.h"
  13 #include <linux/list.h>
  14 #include "util/cache.h"
  15 #include <linux/rbtree.h>
  16 #include "util/symbol.h"
  17 #include "util/callchain.h"
  18 #include "util/strlist.h"
  19 #include "util/values.h"
  20
  21 #include "perf.h"
  22 #include "util/debug.h"
  23 #include "util/header.h"
  24 #include "util/session.h"
  25
  26 #include "util/parse-options.h"
  27 #include "util/parse-events.h"
  28
  29 #include "util/thread.h"
  30 #include "util/sort.h"
  31 #include "util/hist.h"
  32
  33 static char             const *input_name = "perf.data";
  34
  35 static bool             force;
  36 static bool             hide_unresolved;
  37 static bool             dont_use_callchains;
  38
  39 static bool             show_threads;
  40 static struct perf_read_values  show_threads_values;
  41
  42 static char             default_pretty_printing_style[] = "normal";
  43 static char             *pretty_printing_style = default_pretty_printing_style;
  44
  45 static char             callchain_default_opt[] = "fractal,0.5";
  46
  47 static struct event_stat_id *get_stats(struct perf_session *self,
  48                                        u64 event_stream, u32 type, u64 config)
  49 {
  50         struct rb_node **p = &self->stats_by_id.rb_node;
  51         struct rb_node *parent = NULL;
  52         struct event_stat_id *iter, *new;
  53
  54         while (*p != NULL) {
  55                 parent = *p;
  56                 iter = rb_entry(parent, struct event_stat_id, rb_node);
  57                 if (iter->config == config)
  58                         return iter;
  59
  60
  61                 if (config > iter->config)
  62                         p = &(*p)->rb_right;
  63                 else
  64                         p = &(*p)->rb_left;
  65         }
  66
  67         new = malloc(sizeof(struct event_stat_id));
  68         if (new == NULL)
  69                 return NULL;
  70         memset(new, 0, sizeof(struct event_stat_id));
  71         new->event_stream = event_stream;
  72         new->config = config;
  73         new->type = type;
  74         rb_link_node(&new->rb_node, parent, p);
  75         rb_insert_color(&new->rb_node, &self->stats_by_id);
  76         return new;
  77 }
  78
  79 static int perf_session__add_hist_entry(struct perf_session *self,
  80                                         struct addr_location *al,
  81                                         struct sample_data *data)
  82 {
  83         struct map_symbol *syms = NULL;
  84         struct symbol *parent = NULL;
  85         bool hit;
  86         int err;
  87         struct hist_entry *he;
  88         struct event_stat_id *stats;
  89         struct perf_event_attr *attr;
  90
  91         if ((sort__has_parent || symbol_conf.use_callchain) && data->callchain) {
  92                 syms = perf_session__resolve_callchain(self, al->thread,
  93                                                        data->callchain, &parent);
  94                 if (syms == NULL)
  95                         return -ENOMEM;
  96         }
  97
  98         attr = perf_header__find_attr(data->id, &self->header);
  99         if (attr)
 100                 stats = get_stats(self, data->id, attr->type, attr->config);
 101         else
 102                 stats = get_stats(self, data->id, 0, 0);
 103         if (stats == NULL)
 104                 return -ENOMEM;
 105         he = __perf_session__add_hist_entry(&stats->hists, al, parent,
 106                                             data->period, &hit);
 107         if (he == NULL)
 108                 return -ENOMEM;
 109
 110         if (hit)
 111                 he->count += data->period;
 112
 113         if (symbol_conf.use_callchain) {
 114                 if (!hit)
 115                         callchain_init(he->callchain);
 116                 err = append_chain(he->callchain, data->callchain, syms);
 117                 free(syms);
 118
 119                 if (err)
 120                         return err;
 121         }
 122
 123         return 0;
 124 }
 125
 126 static int validate_chain(struct ip_callchain *chain, event_t *event)
 127 {
 128         unsigned int chain_size;
 129
 130         chain_size = event->header.size;
 131         chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
 132
 133         if (chain->nr*sizeof(u64) > chain_size)
 134                 return -1;
 135
 136         return 0;
 137 }
 138
 139 static int add_event_total(struct perf_session *session,
 140                            struct sample_data *data,
 141                            struct perf_event_attr *attr)
 142 {
 143         struct event_stat_id *stats;
 144
 145         if (attr)
 146                 stats = get_stats(session, data->id, attr->type, attr->config);
 147         else
 148                 stats = get_stats(session, data->id, 0, 0);
 149
 150         if (!stats)
 151                 return -ENOMEM;
 152
 153         stats->stats.total += data->period;
 154         session->events_stats.total += data->period;
 155         return 0;
 156 }
 157
 158 static int process_sample_event(event_t *event, struct perf_session *session)
 159 {
 160         struct sample_data data = { .period = 1, };
 161         struct addr_location al;
 162         struct perf_event_attr *attr;
 163
 164         event__parse_sample(event, session->sample_type, &data);
 165
 166         dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld\n", event->header.misc,
 167                     data.pid, data.tid, data.ip, data.period);
 168
 169         if (session->sample_type & PERF_SAMPLE_CALLCHAIN) {
 170                 unsigned int i;
 171
 172                 dump_printf("... chain: nr:%Lu\n", data.callchain->nr);
 173
 174                 if (validate_chain(data.callchain, event) < 0) {
 175                         pr_debug("call-chain problem with event, "
 176                                  "skipping it.\n");
 177                         return 0;
 178                 }
 179
 180                 if (dump_trace) {
 181                         for (i = 0; i < data.callchain->nr; i++)
 182                                 dump_printf("..... %2d: %016Lx\n",
 183                                             i, data.callchain->ips[i]);
 184                 }
 185         }
 186
 187         if (event__preprocess_sample(event, session, &al, NULL) < 0) {
 188                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 189                         event->header.type);
 190                 return -1;
 191         }
 192
 193         if (al.filtered || (hide_unresolved && al.sym == NULL))
 194                 return 0;
 195
 196         if (perf_session__add_hist_entry(session, &al, &data)) {
 197                 pr_debug("problem incrementing symbol count, skipping event\n");
 198                 return -1;
 199         }
 200
 201         attr = perf_header__find_attr(data.id, &session->header);
 202
 203         if (add_event_total(session, &data, attr)) {
 204                 pr_debug("problem adding event count\n");
 205                 return -1;
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int process_read_event(event_t *event, struct perf_session *session __used)
 212 {
 213         struct perf_event_attr *attr;
 214
 215         attr = perf_header__find_attr(event->read.id, &session->header);
 216
 217         if (show_threads) {
 218                 const char *name = attr ? __event_name(attr->type, attr->config)
 219                                    : "unknown";
 220                 perf_read_values_add_value(&show_threads_values,
 221                                            event->read.pid, event->read.tid,
 222                                            event->read.id,
 223                                            name,
 224                                            event->read.value);
 225         }
 226
 227         dump_printf(": %d %d %s %Lu\n", event->read.pid, event->read.tid,
 228                     attr ? __event_name(attr->type, attr->config) : "FAIL",
 229                     event->read.value);
 230
 231         return 0;
 232 }
 233
 234 static int perf_session__setup_sample_type(struct perf_session *self)
 235 {
 236         if (!(self->sample_type & PERF_SAMPLE_CALLCHAIN)) {
 237                 if (sort__has_parent) {
 238                         fprintf(stderr, "selected --sort parent, but no"
 239                                         " callchain data. Did you call"
 240                                         " perf record without -g?\n");
 241                         return -EINVAL;
 242                 }
 243                 if (symbol_conf.use_callchain) {
 244                         fprintf(stderr, "selected -g but no callchain data."
 245                                         " Did you call perf record without"
 246                                         " -g?\n");
 247                         return -1;
 248                 }
 249         } else if (!dont_use_callchains && callchain_param.mode != CHAIN_NONE &&
 250                    !symbol_conf.use_callchain) {
 251                         symbol_conf.use_callchain = true;
 252                         if (register_callchain_param(&callchain_param) < 0) {
 253                                 fprintf(stderr, "Can't register callchain"
 254                                                 " params\n");
 255                                 return -EINVAL;
 256                         }
 257         }
 258
 259         return 0;
 260 }
 261
 262 static struct perf_event_ops event_ops = {
 263         .sample = process_sample_event,
 264         .mmap   = event__process_mmap,
 265         .comm   = event__process_comm,
 266         .exit   = event__process_task,
 267         .fork   = event__process_task,
 268         .lost   = event__process_lost,
 269         .read   = process_read_event,
 270         .attr   = event__process_attr,
 271 };
 272
 273 extern volatile int session_done;
 274
 275 static void sig_handler(int sig __attribute__((__unused__)))
 276 {
 277         session_done = 1;
 278 }
 279
 280 static int __cmd_report(void)
 281 {
 282         int ret = -EINVAL;
 283         struct perf_session *session;
 284         struct rb_node *next;
 285         const char *help = "For a higher level overview, try: perf report --sort comm,dso";
 286
 287         signal(SIGINT, sig_handler);
 288
 289         session = perf_session__new(input_name, O_RDONLY, force);
 290         if (session == NULL)
 291                 return -ENOMEM;
 292
 293         if (show_threads)
 294                 perf_read_values_init(&show_threads_values);
 295
 296         ret = perf_session__setup_sample_type(session);
 297         if (ret)
 298                 goto out_delete;
 299
 300         ret = perf_session__process_events(session, &event_ops);
 301         if (ret)
 302                 goto out_delete;
 303
 304         if (dump_trace) {
 305                 event__print_totals();
 306                 goto out_delete;
 307         }
 308
 309         if (verbose > 3)
 310                 perf_session__fprintf(session, stdout);
 311
 312         if (verbose > 2)
 313                 dsos__fprintf(stdout);
 314
 315         next = rb_first(&session->stats_by_id);
 316         while (next) {
 317                 struct event_stat_id *stats;
 318                 u64 nr_hists;
 319
 320                 stats = rb_entry(next, struct event_stat_id, rb_node);
 321                 perf_session__collapse_resort(&stats->hists);
 322                 nr_hists = perf_session__output_resort(&stats->hists,
 323                                                        stats->stats.total);
 324                 if (use_browser)
 325                         perf_session__browse_hists(&stats->hists, nr_hists,
 326                                                    stats->stats.total, help,
 327                                                    input_name);
 328                 else {
 329                         if (rb_first(&session->stats_by_id) ==
 330                             rb_last(&session->stats_by_id))
 331                                 fprintf(stdout, "# Samples: %Ld\n#\n",
 332                                         stats->stats.total);
 333                         else
 334                                 fprintf(stdout, "# Samples: %Ld %s\n#\n",
 335                                         stats->stats.total,
 336                                         __event_name(stats->type, stats->config));
 337
 338                         perf_session__fprintf_hists(&stats->hists, NULL, false, stdout,
 339                                             stats->stats.total);
 340                         fprintf(stdout, "\n\n");
 341                 }
 342
 343                 next = rb_next(&stats->rb_node);
 344         }
 345
 346         if (!use_browser && sort_order == default_sort_order &&
 347             parent_pattern == default_parent_pattern) {
 348                 fprintf(stdout, "#\n# (%s)\n#\n", help);
 349
 350                 if (show_threads) {
 351                         bool style = !strcmp(pretty_printing_style, "raw");
 352                         perf_read_values_display(stdout, &show_threads_values,
 353                                                  style);
 354                         perf_read_values_destroy(&show_threads_values);
 355                 }
 356         }
 357 out_delete:
 358         perf_session__delete(session);
 359         return ret;
 360 }
 361
 362 static int
 363 parse_callchain_opt(const struct option *opt __used, const char *arg,
 364                     int unset)
 365 {
 366         char *tok;
 367         char *endptr;
 368
 369         /*
 370          * --no-call-graph
 371          */
 372         if (unset) {
 373                 dont_use_callchains = true;
 374                 return 0;
 375         }
 376
 377         symbol_conf.use_callchain = true;
 378
 379         if (!arg)
 380                 return 0;
 381
 382         tok = strtok((char *)arg, ",");
 383         if (!tok)
 384                 return -1;
 385
 386         /* get the output mode */
 387         if (!strncmp(tok, "graph", strlen(arg)))
 388                 callchain_param.mode = CHAIN_GRAPH_ABS;
 389
 390         else if (!strncmp(tok, "flat", strlen(arg)))
 391                 callchain_param.mode = CHAIN_FLAT;
 392
 393         else if (!strncmp(tok, "fractal", strlen(arg)))
 394                 callchain_param.mode = CHAIN_GRAPH_REL;
 395
 396         else if (!strncmp(tok, "none", strlen(arg))) {
 397                 callchain_param.mode = CHAIN_NONE;
 398                 symbol_conf.use_callchain = false;
 399
 400                 return 0;
 401         }
 402
 403         else
 404                 return -1;
 405
 406         /* get the min percentage */
 407         tok = strtok(NULL, ",");
 408         if (!tok)
 409                 goto setup;
 410
 411         callchain_param.min_percent = strtod(tok, &endptr);
 412         if (tok == endptr)
 413                 return -1;
 414
 415 setup:
 416         if (register_callchain_param(&callchain_param) < 0) {
 417                 fprintf(stderr, "Can't register callchain params\n");
 418                 return -1;
 419         }
 420         return 0;
 421 }
 422
 423 static const char * const report_usage[] = {
 424         "perf report [<options>] <command>",
 425         NULL
 426 };
 427
 428 static const struct option options[] = {
 429         OPT_STRING('i', "input", &input_name, "file",
 430                     "input file name"),
 431         OPT_INCR('v', "verbose", &verbose,
 432                     "be more verbose (show symbol address, etc)"),
 433         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 434                     "dump raw trace in ASCII"),
 435         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
 436                    "file", "vmlinux pathname"),
 437         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 438         OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
 439                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
 440         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
 441                     "Show a column with the number of samples"),
 442         OPT_BOOLEAN('T', "threads", &show_threads,
 443                     "Show per-thread event counters"),
 444         OPT_STRING(0, "pretty", &pretty_printing_style, "key",
 445                    "pretty printing style key: normal raw"),
 446         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
 447                    "sort by key(s): pid, comm, dso, symbol, parent"),
 448         OPT_BOOLEAN('P', "full-paths", &symbol_conf.full_paths,
 449                     "Don't shorten the pathnames taking into account the cwd"),
 450         OPT_STRING('p', "parent", &parent_pattern, "regex",
 451                    "regex filter to identify parent, see: '--sort parent'"),
 452         OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
 453                     "Only display entries with parent-match"),
 454         OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
 455                      "Display callchains using output_type and min percent threshold. "
 456                      "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
 457         OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
 458                    "only consider symbols in these dsos"),
 459         OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
 460                    "only consider symbols in these comms"),
 461         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
 462                    "only consider these symbols"),
 463         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
 464                    "width[,width...]",
 465                    "don't try to adjust column width, use these fixed values"),
 466         OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
 467                    "separator for columns, no spaces will be added between "
 468                    "columns '.' is reserved."),
 469         OPT_BOOLEAN('U', "hide-unresolved", &hide_unresolved,
 470                     "Only display entries resolved to a symbol"),
 471         OPT_END()
 472 };
 473
 474 int cmd_report(int argc, const char **argv, const char *prefix __used)
 475 {
 476         argc = parse_options(argc, argv, options, report_usage, 0);
 477
 478         if (strcmp(input_name, "-") != 0)
 479                 setup_browser();
 480
 481         if (symbol__init() < 0)
 482                 return -1;
 483
 484         setup_sorting(report_usage, options);
 485
 486         if (parent_pattern != default_parent_pattern) {
 487                 if (sort_dimension__add("parent") < 0)
 488                         return -1;
 489                 sort_parent.elide = 1;
 490         } else
 491                 symbol_conf.exclude_other = false;
 492
 493         /*
 494          * Any (unrecognized) arguments left?
 495          */
 496         if (argc)
 497                 usage_with_options(report_usage, options);
 498
 499         sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
 500         sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
 501         sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
 502
 503         return __cmd_report();
 504 }