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   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/string.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/header.h"
  25 #include "util/session.h"
  26
  27 #include "util/parse-options.h"
  28 #include "util/parse-events.h"
  29
  30 #include "util/thread.h"
  31 #include "util/sort.h"
  32 #include "util/hist.h"
  33
  34 static char             const *input_name = "perf.data";
  35
  36 static int              force;
  37
  38 static int              show_threads;
  39 static struct perf_read_values  show_threads_values;
  40
  41 static char             default_pretty_printing_style[] = "normal";
  42 static char             *pretty_printing_style = default_pretty_printing_style;
  43
  44 static char             callchain_default_opt[] = "fractal,0.5";
  45
  46 static int perf_session__add_hist_entry(struct perf_session *self,
  47                                         struct addr_location *al,
  48                                         struct ip_callchain *chain, u64 count)
  49 {
  50         struct symbol **syms = NULL, *parent = NULL;
  51         bool hit;
  52         struct hist_entry *he;
  53
  54         if ((sort__has_parent || symbol_conf.use_callchain) && chain)
  55                 syms = perf_session__resolve_callchain(self, al->thread,
  56                                                        chain, &parent);
  57         he = __perf_session__add_hist_entry(self, al, parent, count, &hit);
  58         if (he == NULL)
  59                 return -ENOMEM;
  60
  61         if (hit)
  62                 he->count += count;
  63
  64         if (symbol_conf.use_callchain) {
  65                 if (!hit)
  66                         callchain_init(&he->callchain);
  67                 append_chain(&he->callchain, chain, syms);
  68                 free(syms);
  69         }
  70
  71         return 0;
  72 }
  73
  74 static int validate_chain(struct ip_callchain *chain, event_t *event)
  75 {
  76         unsigned int chain_size;
  77
  78         chain_size = event->header.size;
  79         chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
  80
  81         if (chain->nr*sizeof(u64) > chain_size)
  82                 return -1;
  83
  84         return 0;
  85 }
  86
  87 static int process_sample_event(event_t *event, struct perf_session *session)
  88 {
  89         struct sample_data data = { .period = 1, };
  90         struct addr_location al;
  91
  92         event__parse_sample(event, session->sample_type, &data);
  93
  94         dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
  95                 event->header.misc,
  96                 data.pid, data.tid,
  97                 (void *)(long)data.ip,
  98                 (long long)data.period);
  99
 100         if (session->sample_type & PERF_SAMPLE_CALLCHAIN) {
 101                 unsigned int i;
 102
 103                 dump_printf("... chain: nr:%Lu\n", data.callchain->nr);
 104
 105                 if (validate_chain(data.callchain, event) < 0) {
 106                         pr_debug("call-chain problem with event, "
 107                                  "skipping it.\n");
 108                         return 0;
 109                 }
 110
 111                 if (dump_trace) {
 112                         for (i = 0; i < data.callchain->nr; i++)
 113                                 dump_printf("..... %2d: %016Lx\n",
 114                                             i, data.callchain->ips[i]);
 115                 }
 116         }
 117
 118         if (event__preprocess_sample(event, session, &al, NULL) < 0) {
 119                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 120                         event->header.type);
 121                 return -1;
 122         }
 123
 124         if (al.filtered)
 125                 return 0;
 126
 127         if (perf_session__add_hist_entry(session, &al, data.callchain, data.period)) {
 128                 pr_debug("problem incrementing symbol count, skipping event\n");
 129                 return -1;
 130         }
 131
 132         session->events_stats.total += data.period;
 133         return 0;
 134 }
 135
 136 static int process_read_event(event_t *event, struct perf_session *session __used)
 137 {
 138         struct perf_event_attr *attr;
 139
 140         attr = perf_header__find_attr(event->read.id, &session->header);
 141
 142         if (show_threads) {
 143                 const char *name = attr ? __event_name(attr->type, attr->config)
 144                                    : "unknown";
 145                 perf_read_values_add_value(&show_threads_values,
 146                                            event->read.pid, event->read.tid,
 147                                            event->read.id,
 148                                            name,
 149                                            event->read.value);
 150         }
 151
 152         dump_printf(": %d %d %s %Lu\n", event->read.pid, event->read.tid,
 153                     attr ? __event_name(attr->type, attr->config) : "FAIL",
 154                     event->read.value);
 155
 156         return 0;
 157 }
 158
 159 static int perf_session__setup_sample_type(struct perf_session *self)
 160 {
 161         if (!(self->sample_type & PERF_SAMPLE_CALLCHAIN)) {
 162                 if (sort__has_parent) {
 163                         fprintf(stderr, "selected --sort parent, but no"
 164                                         " callchain data. Did you call"
 165                                         " perf record without -g?\n");
 166                         return -EINVAL;
 167                 }
 168                 if (symbol_conf.use_callchain) {
 169                         fprintf(stderr, "selected -g but no callchain data."
 170                                         " Did you call perf record without"
 171                                         " -g?\n");
 172                         return -1;
 173                 }
 174         } else if (callchain_param.mode != CHAIN_NONE && !symbol_conf.use_callchain) {
 175                         symbol_conf.use_callchain = true;
 176                         if (register_callchain_param(&callchain_param) < 0) {
 177                                 fprintf(stderr, "Can't register callchain"
 178                                                 " params\n");
 179                                 return -EINVAL;
 180                         }
 181         }
 182
 183         return 0;
 184 }
 185
 186 static struct perf_event_ops event_ops = {
 187         .process_sample_event   = process_sample_event,
 188         .process_mmap_event     = event__process_mmap,
 189         .process_comm_event     = event__process_comm,
 190         .process_exit_event     = event__process_task,
 191         .process_fork_event     = event__process_task,
 192         .process_lost_event     = event__process_lost,
 193         .process_read_event     = process_read_event,
 194 };
 195
 196 static int __cmd_report(void)
 197 {
 198         int ret = -EINVAL;
 199         struct perf_session *session;
 200
 201         session = perf_session__new(input_name, O_RDONLY, force);
 202         if (session == NULL)
 203                 return -ENOMEM;
 204
 205         if (show_threads)
 206                 perf_read_values_init(&show_threads_values);
 207
 208         ret = perf_session__setup_sample_type(session);
 209         if (ret)
 210                 goto out_delete;
 211
 212         ret = perf_session__process_events(session, &event_ops);
 213         if (ret)
 214                 goto out_delete;
 215
 216         if (dump_trace) {
 217                 event__print_totals();
 218                 goto out_delete;
 219         }
 220
 221         if (verbose > 3)
 222                 perf_session__fprintf(session, stdout);
 223
 224         if (verbose > 2)
 225                 dsos__fprintf(stdout);
 226
 227         perf_session__collapse_resort(session);
 228         perf_session__output_resort(session, session->events_stats.total);
 229         fprintf(stdout, "# Samples: %Ld\n#\n", session->events_stats.total);
 230         perf_session__fprintf_hists(session, NULL, false, stdout);
 231         if (sort_order == default_sort_order &&
 232             parent_pattern == default_parent_pattern)
 233                 fprintf(stdout, "#\n# (For a higher level overview, try: perf report --sort comm,dso)\n#\n");
 234
 235         if (show_threads) {
 236                 bool raw_printing_style = !strcmp(pretty_printing_style, "raw");
 237                 perf_read_values_display(stdout, &show_threads_values,
 238                                          raw_printing_style);
 239                 perf_read_values_destroy(&show_threads_values);
 240         }
 241 out_delete:
 242         perf_session__delete(session);
 243         return ret;
 244 }
 245
 246 static int
 247 parse_callchain_opt(const struct option *opt __used, const char *arg,
 248                     int unset __used)
 249 {
 250         char *tok;
 251         char *endptr;
 252
 253         symbol_conf.use_callchain = true;
 254
 255         if (!arg)
 256                 return 0;
 257
 258         tok = strtok((char *)arg, ",");
 259         if (!tok)
 260                 return -1;
 261
 262         /* get the output mode */
 263         if (!strncmp(tok, "graph", strlen(arg)))
 264                 callchain_param.mode = CHAIN_GRAPH_ABS;
 265
 266         else if (!strncmp(tok, "flat", strlen(arg)))
 267                 callchain_param.mode = CHAIN_FLAT;
 268
 269         else if (!strncmp(tok, "fractal", strlen(arg)))
 270                 callchain_param.mode = CHAIN_GRAPH_REL;
 271
 272         else if (!strncmp(tok, "none", strlen(arg))) {
 273                 callchain_param.mode = CHAIN_NONE;
 274                 symbol_conf.use_callchain = true;
 275
 276                 return 0;
 277         }
 278
 279         else
 280                 return -1;
 281
 282         /* get the min percentage */
 283         tok = strtok(NULL, ",");
 284         if (!tok)
 285                 goto setup;
 286
 287         callchain_param.min_percent = strtod(tok, &endptr);
 288         if (tok == endptr)
 289                 return -1;
 290
 291 setup:
 292         if (register_callchain_param(&callchain_param) < 0) {
 293                 fprintf(stderr, "Can't register callchain params\n");
 294                 return -1;
 295         }
 296         return 0;
 297 }
 298
 299 static const char * const report_usage[] = {
 300         "perf report [<options>] <command>",
 301         NULL
 302 };
 303
 304 static const struct option options[] = {
 305         OPT_STRING('i', "input", &input_name, "file",
 306                     "input file name"),
 307         OPT_BOOLEAN('v', "verbose", &verbose,
 308                     "be more verbose (show symbol address, etc)"),
 309         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 310                     "dump raw trace in ASCII"),
 311         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
 312                    "file", "vmlinux pathname"),
 313         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 314         OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
 315                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
 316         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
 317                     "Show a column with the number of samples"),
 318         OPT_BOOLEAN('T', "threads", &show_threads,
 319                     "Show per-thread event counters"),
 320         OPT_STRING(0, "pretty", &pretty_printing_style, "key",
 321                    "pretty printing style key: normal raw"),
 322         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
 323                    "sort by key(s): pid, comm, dso, symbol, parent"),
 324         OPT_BOOLEAN('P', "full-paths", &symbol_conf.full_paths,
 325                     "Don't shorten the pathnames taking into account the cwd"),
 326         OPT_STRING('p', "parent", &parent_pattern, "regex",
 327                    "regex filter to identify parent, see: '--sort parent'"),
 328         OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
 329                     "Only display entries with parent-match"),
 330         OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
 331                      "Display callchains using output_type and min percent threshold. "
 332                      "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
 333         OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
 334                    "only consider symbols in these dsos"),
 335         OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
 336                    "only consider symbols in these comms"),
 337         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
 338                    "only consider these symbols"),
 339         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
 340                    "width[,width...]",
 341                    "don't try to adjust column width, use these fixed values"),
 342         OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
 343                    "separator for columns, no spaces will be added between "
 344                    "columns '.' is reserved."),
 345         OPT_END()
 346 };
 347
 348 int cmd_report(int argc, const char **argv, const char *prefix __used)
 349 {
 350         argc = parse_options(argc, argv, options, report_usage, 0);
 351
 352         setup_pager();
 353
 354         if (symbol__init() < 0)
 355                 return -1;
 356
 357         setup_sorting(report_usage, options);
 358
 359         if (parent_pattern != default_parent_pattern) {
 360                 sort_dimension__add("parent");
 361                 sort_parent.elide = 1;
 362         } else
 363                 symbol_conf.exclude_other = false;
 364
 365         /*
 366          * Any (unrecognized) arguments left?
 367          */
 368         if (argc)
 369                 usage_with_options(report_usage, options);
 370
 371         sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
 372         sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
 373         sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
 374
 375         return __cmd_report();
 376 }