tools/perf/builtin-top.c

   1 /*
   2  * builtin-top.c
   3  *
   4  * Builtin top command: Display a continuously updated profile of
   5  * any workload, CPU or specific PID.
   6  *
   7  * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
   8  *
   9  * Improvements and fixes by:
  10  *
  11  *   Arjan van de Ven <arjan@linux.intel.com>
  12  *   Yanmin Zhang <yanmin.zhang@intel.com>
  13  *   Wu Fengguang <fengguang.wu@intel.com>
  14  *   Mike Galbraith <efault@gmx.de>
  15  *   Paul Mackerras <paulus@samba.org>
  16  *
  17  * Released under the GPL v2. (and only v2, not any later version)
  18  */
  19 #include "builtin.h"
  20
  21 #include "perf.h"
  22
  23 #include "util/color.h"
  24 #include "util/evlist.h"
  25 #include "util/evsel.h"
  26 #include "util/session.h"
  27 #include "util/symbol.h"
  28 #include "util/thread.h"
  29 #include "util/thread_map.h"
  30 #include "util/util.h"
  31 #include <linux/rbtree.h>
  32 #include "util/parse-options.h"
  33 #include "util/parse-events.h"
  34 #include "util/cpumap.h"
  35 #include "util/xyarray.h"
  36
  37 #include "util/debug.h"
  38
  39 #include <assert.h>
  40 #include <fcntl.h>
  41
  42 #include <stdio.h>
  43 #include <termios.h>
  44 #include <unistd.h>
  45 #include <inttypes.h>
  46
  47 #include <errno.h>
  48 #include <time.h>
  49 #include <sched.h>
  50 #include <pthread.h>
  51
  52 #include <sys/syscall.h>
  53 #include <sys/ioctl.h>
  54 #include <sys/poll.h>
  55 #include <sys/prctl.h>
  56 #include <sys/wait.h>
  57 #include <sys/uio.h>
  58 #include <sys/mman.h>
  59
  60 #include <linux/unistd.h>
  61 #include <linux/types.h>
  62
  63 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
  64
  65 struct perf_evlist              *evsel_list;
  66
  67 static bool                     system_wide                     =  false;
  68
  69 static int                      default_interval                =      0;
  70
  71 static int                      count_filter                    =      5;
  72 static int                      print_entries;
  73
  74 static int                      target_pid                      =     -1;
  75 static int                      target_tid                      =     -1;
  76 static struct thread_map        *threads;
  77 static bool                     inherit                         =  false;
  78 static struct cpu_map           *cpus;
  79 static int                      realtime_prio                   =      0;
  80 static bool                     group                           =  false;
  81 static unsigned int             page_size;
  82 static unsigned int             mmap_pages                      =    128;
  83 static int                      freq                            =   1000; /* 1 KHz */
  84
  85 static int                      delay_secs                      =      2;
  86 static bool                     zero                            =  false;
  87 static bool                     dump_symtab                     =  false;
  88
  89 static bool                     hide_kernel_symbols             =  false;
  90 static bool                     hide_user_symbols               =  false;
  91 static struct winsize           winsize;
  92
  93 /*
  94  * Source
  95  */
  96
  97 struct source_line {
  98         u64                     eip;
  99         unsigned long           count[MAX_COUNTERS];
 100         char                    *line;
 101         struct source_line      *next;
 102 };
 103
 104 static const char               *sym_filter                     =   NULL;
 105 struct sym_entry                *sym_filter_entry               =   NULL;
 106 struct sym_entry                *sym_filter_entry_sched         =   NULL;
 107 static int                      sym_pcnt_filter                 =      5;
 108 static int                      sym_counter                     =      0;
 109 static struct perf_evsel        *sym_evsel                      =   NULL;
 110 static int                      display_weighted                =     -1;
 111 static const char               *cpu_list;
 112
 113 /*
 114  * Symbols
 115  */
 116
 117 struct sym_entry_source {
 118         struct source_line      *source;
 119         struct source_line      *lines;
 120         struct source_line      **lines_tail;
 121         pthread_mutex_t         lock;
 122 };
 123
 124 struct sym_entry {
 125         struct rb_node          rb_node;
 126         struct list_head        node;
 127         unsigned long           snap_count;
 128         double                  weight;
 129         int                     skip;
 130         u16                     name_len;
 131         u8                      origin;
 132         struct map              *map;
 133         struct sym_entry_source *src;
 134         unsigned long           count[0];
 135 };
 136
 137 /*
 138  * Source functions
 139  */
 140
 141 static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
 142 {
 143        return ((void *)self) + symbol_conf.priv_size;
 144 }
 145
 146 void get_term_dimensions(struct winsize *ws)
 147 {
 148         char *s = getenv("LINES");
 149
 150         if (s != NULL) {
 151                 ws->ws_row = atoi(s);
 152                 s = getenv("COLUMNS");
 153                 if (s != NULL) {
 154                         ws->ws_col = atoi(s);
 155                         if (ws->ws_row && ws->ws_col)
 156                                 return;
 157                 }
 158         }
 159 #ifdef TIOCGWINSZ
 160         if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
 161             ws->ws_row && ws->ws_col)
 162                 return;
 163 #endif
 164         ws->ws_row = 25;
 165         ws->ws_col = 80;
 166 }
 167
 168 static void update_print_entries(struct winsize *ws)
 169 {
 170         print_entries = ws->ws_row;
 171
 172         if (print_entries > 9)
 173                 print_entries -= 9;
 174 }
 175
 176 static void sig_winch_handler(int sig __used)
 177 {
 178         get_term_dimensions(&winsize);
 179         update_print_entries(&winsize);
 180 }
 181
 182 static int parse_source(struct sym_entry *syme)
 183 {
 184         struct symbol *sym;
 185         struct sym_entry_source *source;
 186         struct map *map;
 187         FILE *file;
 188         char command[PATH_MAX*2];
 189         const char *path;
 190         u64 len;
 191
 192         if (!syme)
 193                 return -1;
 194
 195         sym = sym_entry__symbol(syme);
 196         map = syme->map;
 197
 198         /*
 199          * We can't annotate with just /proc/kallsyms
 200          */
 201         if (map->dso->origin == DSO__ORIG_KERNEL)
 202                 return -1;
 203
 204         if (syme->src == NULL) {
 205                 syme->src = zalloc(sizeof(*source));
 206                 if (syme->src == NULL)
 207                         return -1;
 208                 pthread_mutex_init(&syme->src->lock, NULL);
 209         }
 210
 211         source = syme->src;
 212
 213         if (source->lines) {
 214                 pthread_mutex_lock(&source->lock);
 215                 goto out_assign;
 216         }
 217         path = map->dso->long_name;
 218
 219         len = sym->end - sym->start;
 220
 221         sprintf(command,
 222                 "objdump --start-address=%#0*" PRIx64 " --stop-address=%#0*" PRIx64 " -dS %s",
 223                 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
 224                 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
 225
 226         file = popen(command, "r");
 227         if (!file)
 228                 return -1;
 229
 230         pthread_mutex_lock(&source->lock);
 231         source->lines_tail = &source->lines;
 232         while (!feof(file)) {
 233                 struct source_line *src;
 234                 size_t dummy = 0;
 235                 char *c, *sep;
 236
 237                 src = malloc(sizeof(struct source_line));
 238                 assert(src != NULL);
 239                 memset(src, 0, sizeof(struct source_line));
 240
 241                 if (getline(&src->line, &dummy, file) < 0)
 242                         break;
 243                 if (!src->line)
 244                         break;
 245
 246                 c = strchr(src->line, '\n');
 247                 if (c)
 248                         *c = 0;
 249
 250                 src->next = NULL;
 251                 *source->lines_tail = src;
 252                 source->lines_tail = &src->next;
 253
 254                 src->eip = strtoull(src->line, &sep, 16);
 255                 if (*sep == ':')
 256                         src->eip = map__objdump_2ip(map, src->eip);
 257                 else /* this line has no ip info (e.g. source line) */
 258                         src->eip = 0;
 259         }
 260         pclose(file);
 261 out_assign:
 262         sym_filter_entry = syme;
 263         pthread_mutex_unlock(&source->lock);
 264         return 0;
 265 }
 266
 267 static void __zero_source_counters(struct sym_entry *syme)
 268 {
 269         int i;
 270         struct source_line *line;
 271
 272         line = syme->src->lines;
 273         while (line) {
 274                 for (i = 0; i < evsel_list->nr_entries; i++)
 275                         line->count[i] = 0;
 276                 line = line->next;
 277         }
 278 }
 279
 280 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
 281 {
 282         struct source_line *line;
 283
 284         if (syme != sym_filter_entry)
 285                 return;
 286
 287         if (pthread_mutex_trylock(&syme->src->lock))
 288                 return;
 289
 290         if (syme->src == NULL || syme->src->source == NULL)
 291                 goto out_unlock;
 292
 293         for (line = syme->src->lines; line; line = line->next) {
 294                 /* skip lines without IP info */
 295                 if (line->eip == 0)
 296                         continue;
 297                 if (line->eip == ip) {
 298                         line->count[counter]++;
 299                         break;
 300                 }
 301                 if (line->eip > ip)
 302                         break;
 303         }
 304 out_unlock:
 305         pthread_mutex_unlock(&syme->src->lock);
 306 }
 307
 308 #define PATTERN_LEN             (BITS_PER_LONG / 4 + 2)
 309
 310 static void lookup_sym_source(struct sym_entry *syme)
 311 {
 312         struct symbol *symbol = sym_entry__symbol(syme);
 313         struct source_line *line;
 314         char pattern[PATTERN_LEN + 1];
 315
 316         sprintf(pattern, "%0*" PRIx64 " <", BITS_PER_LONG / 4,
 317                 map__rip_2objdump(syme->map, symbol->start));
 318
 319         pthread_mutex_lock(&syme->src->lock);
 320         for (line = syme->src->lines; line; line = line->next) {
 321                 if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
 322                         syme->src->source = line;
 323                         break;
 324                 }
 325         }
 326         pthread_mutex_unlock(&syme->src->lock);
 327 }
 328
 329 static void show_lines(struct source_line *queue, int count, int total)
 330 {
 331         int i;
 332         struct source_line *line;
 333
 334         line = queue;
 335         for (i = 0; i < count; i++) {
 336                 float pcnt = 100.0*(float)line->count[sym_counter]/(float)total;
 337
 338                 printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line);
 339                 line = line->next;
 340         }
 341 }
 342
 343 #define TRACE_COUNT     3
 344
 345 static void show_details(struct sym_entry *syme)
 346 {
 347         struct symbol *symbol;
 348         struct source_line *line;
 349         struct source_line *line_queue = NULL;
 350         int displayed = 0;
 351         int line_queue_count = 0, total = 0, more = 0;
 352
 353         if (!syme)
 354                 return;
 355
 356         if (!syme->src->source)
 357                 lookup_sym_source(syme);
 358
 359         if (!syme->src->source)
 360                 return;
 361
 362         symbol = sym_entry__symbol(syme);
 363         printf("Showing %s for %s\n", event_name(sym_evsel), symbol->name);
 364         printf("  Events  Pcnt (>=%d%%)\n", sym_pcnt_filter);
 365
 366         pthread_mutex_lock(&syme->src->lock);
 367         line = syme->src->source;
 368         while (line) {
 369                 total += line->count[sym_counter];
 370                 line = line->next;
 371         }
 372
 373         line = syme->src->source;
 374         while (line) {
 375                 float pcnt = 0.0;
 376
 377                 if (!line_queue_count)
 378                         line_queue = line;
 379                 line_queue_count++;
 380
 381                 if (line->count[sym_counter])
 382                         pcnt = 100.0 * line->count[sym_counter] / (float)total;
 383                 if (pcnt >= (float)sym_pcnt_filter) {
 384                         if (displayed <= print_entries)
 385                                 show_lines(line_queue, line_queue_count, total);
 386                         else more++;
 387                         displayed += line_queue_count;
 388                         line_queue_count = 0;
 389                         line_queue = NULL;
 390                 } else if (line_queue_count > TRACE_COUNT) {
 391                         line_queue = line_queue->next;
 392                         line_queue_count--;
 393                 }
 394
 395                 line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8;
 396                 line = line->next;
 397         }
 398         pthread_mutex_unlock(&syme->src->lock);
 399         if (more)
 400                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 401 }
 402
 403 /*
 404  * Symbols will be added here in event__process_sample and will get out
 405  * after decayed.
 406  */
 407 static LIST_HEAD(active_symbols);
 408 static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER;
 409
 410 /*
 411  * Ordering weight: count-1 * count-2 * ... / count-n
 412  */
 413 static double sym_weight(const struct sym_entry *sym)
 414 {
 415         double weight = sym->snap_count;
 416         int counter;
 417
 418         if (!display_weighted)
 419                 return weight;
 420
 421         for (counter = 1; counter < evsel_list->nr_entries - 1; counter++)
 422                 weight *= sym->count[counter];
 423
 424         weight /= (sym->count[counter] + 1);
 425
 426         return weight;
 427 }
 428
 429 static long                     samples;
 430 static long                     kernel_samples, us_samples;
 431 static long                     exact_samples;
 432 static long                     guest_us_samples, guest_kernel_samples;
 433 static const char               CONSOLE_CLEAR[] = "\e[H\e[2J";
 434
 435 static void __list_insert_active_sym(struct sym_entry *syme)
 436 {
 437         list_add(&syme->node, &active_symbols);
 438 }
 439
 440 static void list_remove_active_sym(struct sym_entry *syme)
 441 {
 442         pthread_mutex_lock(&active_symbols_lock);
 443         list_del_init(&syme->node);
 444         pthread_mutex_unlock(&active_symbols_lock);
 445 }
 446
 447 static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
 448 {
 449         struct rb_node **p = &tree->rb_node;
 450         struct rb_node *parent = NULL;
 451         struct sym_entry *iter;
 452
 453         while (*p != NULL) {
 454                 parent = *p;
 455                 iter = rb_entry(parent, struct sym_entry, rb_node);
 456
 457                 if (se->weight > iter->weight)
 458                         p = &(*p)->rb_left;
 459                 else
 460                         p = &(*p)->rb_right;
 461         }
 462
 463         rb_link_node(&se->rb_node, parent, p);
 464         rb_insert_color(&se->rb_node, tree);
 465 }
 466
 467 static void print_sym_table(struct perf_session *session)
 468 {
 469         int printed = 0, j;
 470         struct perf_evsel *counter;
 471         int snap = !display_weighted ? sym_counter : 0;
 472         float samples_per_sec = samples/delay_secs;
 473         float ksamples_per_sec = kernel_samples/delay_secs;
 474         float us_samples_per_sec = (us_samples)/delay_secs;
 475         float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
 476         float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
 477         float esamples_percent = (100.0*exact_samples)/samples;
 478         float sum_ksamples = 0.0;
 479         struct sym_entry *syme, *n;
 480         struct rb_root tmp = RB_ROOT;
 481         struct rb_node *nd;
 482         int sym_width = 0, dso_width = 0, dso_short_width = 0;
 483         const int win_width = winsize.ws_col - 1;
 484
 485         samples = us_samples = kernel_samples = exact_samples = 0;
 486         guest_kernel_samples = guest_us_samples = 0;
 487
 488         /* Sort the active symbols */
 489         pthread_mutex_lock(&active_symbols_lock);
 490         syme = list_entry(active_symbols.next, struct sym_entry, node);
 491         pthread_mutex_unlock(&active_symbols_lock);
 492
 493         list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
 494                 syme->snap_count = syme->count[snap];
 495                 if (syme->snap_count != 0) {
 496
 497                         if ((hide_user_symbols &&
 498                              syme->origin == PERF_RECORD_MISC_USER) ||
 499                             (hide_kernel_symbols &&
 500                              syme->origin == PERF_RECORD_MISC_KERNEL)) {
 501                                 list_remove_active_sym(syme);
 502                                 continue;
 503                         }
 504                         syme->weight = sym_weight(syme);
 505                         rb_insert_active_sym(&tmp, syme);
 506                         sum_ksamples += syme->snap_count;
 507
 508                         for (j = 0; j < evsel_list->nr_entries; j++)
 509                                 syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
 510                 } else
 511                         list_remove_active_sym(syme);
 512         }
 513
 514         puts(CONSOLE_CLEAR);
 515
 516         if (!perf_guest) {
 517                 printf("   PerfTop:%8.0f irqs/sec  kernel:%4.1f%%"
 518                         "  exact: %4.1f%% [",
 519                         samples_per_sec,
 520                         100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
 521                                          samples_per_sec)),
 522                         esamples_percent);
 523         } else {
 524                 printf("   PerfTop:%8.0f irqs/sec  kernel:%4.1f%% us:%4.1f%%"
 525                         " guest kernel:%4.1f%% guest us:%4.1f%%"
 526                         " exact: %4.1f%% [",
 527                         samples_per_sec,
 528                         100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
 529                                           samples_per_sec)),
 530                         100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
 531                                           samples_per_sec)),
 532                         100.0 - (100.0 * ((samples_per_sec -
 533                                                 guest_kernel_samples_per_sec) /
 534                                           samples_per_sec)),
 535                         100.0 - (100.0 * ((samples_per_sec -
 536                                            guest_us_samples_per_sec) /
 537                                           samples_per_sec)),
 538                         esamples_percent);
 539         }
 540
 541         if (evsel_list->nr_entries == 1 || !display_weighted) {
 542                 struct perf_evsel *first;
 543                 first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
 544                 printf("%" PRIu64, (uint64_t)first->attr.sample_period);
 545                 if (freq)
 546                         printf("Hz ");
 547                 else
 548                         printf(" ");
 549         }
 550
 551         if (!display_weighted)
 552                 printf("%s", event_name(sym_evsel));
 553         else list_for_each_entry(counter, &evsel_list->entries, node) {
 554                 if (counter->idx)
 555                         printf("/");
 556
 557                 printf("%s", event_name(counter));
 558         }
 559
 560         printf( "], ");
 561
 562         if (target_pid != -1)
 563                 printf(" (target_pid: %d", target_pid);
 564         else if (target_tid != -1)
 565                 printf(" (target_tid: %d", target_tid);
 566         else
 567                 printf(" (all");
 568
 569         if (cpu_list)
 570                 printf(", CPU%s: %s)\n", cpus->nr > 1 ? "s" : "", cpu_list);
 571         else {
 572                 if (target_tid != -1)
 573                         printf(")\n");
 574                 else
 575                         printf(", %d CPU%s)\n", cpus->nr, cpus->nr > 1 ? "s" : "");
 576         }
 577
 578         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 579
 580         if (session->hists.stats.total_lost != 0) {
 581                 color_fprintf(stdout, PERF_COLOR_RED, "WARNING:");
 582                 printf(" LOST %" PRIu64 " events, Check IO/CPU overload\n",
 583                        session->hists.stats.total_lost);
 584         }
 585
 586         if (sym_filter_entry) {
 587                 show_details(sym_filter_entry);
 588                 return;
 589         }
 590
 591         /*
 592          * Find the longest symbol name that will be displayed
 593          */
 594         for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
 595                 syme = rb_entry(nd, struct sym_entry, rb_node);
 596                 if (++printed > print_entries ||
 597                     (int)syme->snap_count < count_filter)
 598                         continue;
 599
 600                 if (syme->map->dso->long_name_len > dso_width)
 601                         dso_width = syme->map->dso->long_name_len;
 602
 603                 if (syme->map->dso->short_name_len > dso_short_width)
 604                         dso_short_width = syme->map->dso->short_name_len;
 605
 606                 if (syme->name_len > sym_width)
 607                         sym_width = syme->name_len;
 608         }
 609
 610         printed = 0;
 611
 612         if (sym_width + dso_width > winsize.ws_col - 29) {
 613                 dso_width = dso_short_width;
 614                 if (sym_width + dso_width > winsize.ws_col - 29)
 615                         sym_width = winsize.ws_col - dso_width - 29;
 616         }
 617         putchar('\n');
 618         if (evsel_list->nr_entries == 1)
 619                 printf("             samples  pcnt");
 620         else
 621                 printf("   weight    samples  pcnt");
 622
 623         if (verbose)
 624                 printf("         RIP       ");
 625         printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
 626         printf("   %s    _______ _____",
 627                evsel_list->nr_entries == 1 ? "      " : "______");
 628         if (verbose)
 629                 printf(" ________________");
 630         printf(" %-*.*s", sym_width, sym_width, graph_line);
 631         printf(" %-*.*s", dso_width, dso_width, graph_line);
 632         puts("\n");
 633
 634         for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
 635                 struct symbol *sym;
 636                 double pcnt;
 637
 638                 syme = rb_entry(nd, struct sym_entry, rb_node);
 639                 sym = sym_entry__symbol(syme);
 640                 if (++printed > print_entries || (int)syme->snap_count < count_filter)
 641                         continue;
 642
 643                 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
 644                                          sum_ksamples));
 645
 646                 if (evsel_list->nr_entries == 1 || !display_weighted)
 647                         printf("%20.2f ", syme->weight);
 648                 else
 649                         printf("%9.1f %10ld ", syme->weight, syme->snap_count);
 650
 651                 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
 652                 if (verbose)
 653                         printf(" %016" PRIx64, sym->start);
 654                 printf(" %-*.*s", sym_width, sym_width, sym->name);
 655                 printf(" %-*.*s\n", dso_width, dso_width,
 656                        dso_width >= syme->map->dso->long_name_len ?
 657                                         syme->map->dso->long_name :
 658                                         syme->map->dso->short_name);
 659         }
 660 }
 661
 662 static void prompt_integer(int *target, const char *msg)
 663 {
 664         char *buf = malloc(0), *p;
 665         size_t dummy = 0;
 666         int tmp;
 667
 668         fprintf(stdout, "\n%s: ", msg);
 669         if (getline(&buf, &dummy, stdin) < 0)
 670                 return;
 671
 672         p = strchr(buf, '\n');
 673         if (p)
 674                 *p = 0;
 675
 676         p = buf;
 677         while(*p) {
 678                 if (!isdigit(*p))
 679                         goto out_free;
 680                 p++;
 681         }
 682         tmp = strtoul(buf, NULL, 10);
 683         *target = tmp;
 684 out_free:
 685         free(buf);
 686 }
 687
 688 static void prompt_percent(int *target, const char *msg)
 689 {
 690         int tmp = 0;
 691
 692         prompt_integer(&tmp, msg);
 693         if (tmp >= 0 && tmp <= 100)
 694                 *target = tmp;
 695 }
 696
 697 static void prompt_symbol(struct sym_entry **target, const char *msg)
 698 {
 699         char *buf = malloc(0), *p;
 700         struct sym_entry *syme = *target, *n, *found = NULL;
 701         size_t dummy = 0;
 702
 703         /* zero counters of active symbol */
 704         if (syme) {
 705                 pthread_mutex_lock(&syme->src->lock);
 706                 __zero_source_counters(syme);
 707                 *target = NULL;
 708                 pthread_mutex_unlock(&syme->src->lock);
 709         }
 710
 711         fprintf(stdout, "\n%s: ", msg);
 712         if (getline(&buf, &dummy, stdin) < 0)
 713                 goto out_free;
 714
 715         p = strchr(buf, '\n');
 716         if (p)
 717                 *p = 0;
 718
 719         pthread_mutex_lock(&active_symbols_lock);
 720         syme = list_entry(active_symbols.next, struct sym_entry, node);
 721         pthread_mutex_unlock(&active_symbols_lock);
 722
 723         list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
 724                 struct symbol *sym = sym_entry__symbol(syme);
 725
 726                 if (!strcmp(buf, sym->name)) {
 727                         found = syme;
 728                         break;
 729                 }
 730         }
 731
 732         if (!found) {
 733                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 734                 sleep(1);
 735                 return;
 736         } else
 737                 parse_source(found);
 738
 739 out_free:
 740         free(buf);
 741 }
 742
 743 static void print_mapped_keys(void)
 744 {
 745         char *name = NULL;
 746
 747         if (sym_filter_entry) {
 748                 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
 749                 name = sym->name;
 750         }
 751
 752         fprintf(stdout, "\nMapped keys:\n");
 753         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", delay_secs);
 754         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", print_entries);
 755
 756         if (evsel_list->nr_entries > 1)
 757                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", event_name(sym_evsel));
 758
 759         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", count_filter);
 760
 761         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
 762         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 763         fprintf(stdout, "\t[S]     stop annotation.\n");
 764
 765         if (evsel_list->nr_entries > 1)
 766                 fprintf(stdout, "\t[w]     toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
 767
 768         fprintf(stdout,
 769                 "\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 770                 hide_kernel_symbols ? "yes" : "no");
 771         fprintf(stdout,
 772                 "\t[U]     hide user symbols.               \t(%s)\n",
 773                 hide_user_symbols ? "yes" : "no");
 774         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", zero ? 1 : 0);
 775         fprintf(stdout, "\t[qQ]    quit.\n");
 776 }
 777
 778 static int key_mapped(int c)
 779 {
 780         switch (c) {
 781                 case 'd':
 782                 case 'e':
 783                 case 'f':
 784                 case 'z':
 785                 case 'q':
 786                 case 'Q':
 787                 case 'K':
 788                 case 'U':
 789                 case 'F':
 790                 case 's':
 791                 case 'S':
 792                         return 1;
 793                 case 'E':
 794                 case 'w':
 795                         return evsel_list->nr_entries > 1 ? 1 : 0;
 796                 default:
 797                         break;
 798         }
 799
 800         return 0;
 801 }
 802
 803 static void handle_keypress(struct perf_session *session, int c)
 804 {
 805         if (!key_mapped(c)) {
 806                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 807                 struct termios tc, save;
 808
 809                 print_mapped_keys();
 810                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 811                 fflush(stdout);
 812
 813                 tcgetattr(0, &save);
 814                 tc = save;
 815                 tc.c_lflag &= ~(ICANON | ECHO);
 816                 tc.c_cc[VMIN] = 0;
 817                 tc.c_cc[VTIME] = 0;
 818                 tcsetattr(0, TCSANOW, &tc);
 819
 820                 poll(&stdin_poll, 1, -1);
 821                 c = getc(stdin);
 822
 823                 tcsetattr(0, TCSAFLUSH, &save);
 824                 if (!key_mapped(c))
 825                         return;
 826         }
 827
 828         switch (c) {
 829                 case 'd':
 830                         prompt_integer(&delay_secs, "Enter display delay");
 831                         if (delay_secs < 1)
 832                                 delay_secs = 1;
 833                         break;
 834                 case 'e':
 835                         prompt_integer(&print_entries, "Enter display entries (lines)");
 836                         if (print_entries == 0) {
 837                                 sig_winch_handler(SIGWINCH);
 838                                 signal(SIGWINCH, sig_winch_handler);
 839                         } else
 840                                 signal(SIGWINCH, SIG_DFL);
 841                         break;
 842                 case 'E':
 843                         if (evsel_list->nr_entries > 1) {
 844                                 fprintf(stderr, "\nAvailable events:");
 845
 846                                 list_for_each_entry(sym_evsel, &evsel_list->entries, node)
 847                                         fprintf(stderr, "\n\t%d %s", sym_evsel->idx, event_name(sym_evsel));
 848
 849                                 prompt_integer(&sym_counter, "Enter details event counter");
 850
 851                                 if (sym_counter >= evsel_list->nr_entries) {
 852                                         sym_evsel = list_entry(evsel_list->entries.next, struct perf_evsel, node);
 853                                         sym_counter = 0;
 854                                         fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(sym_evsel));
 855                                         sleep(1);
 856                                         break;
 857                                 }
 858                                 list_for_each_entry(sym_evsel, &evsel_list->entries, node)
 859                                         if (sym_evsel->idx == sym_counter)
 860                                                 break;
 861                         } else sym_counter = 0;
 862                         break;
 863                 case 'f':
 864                         prompt_integer(&count_filter, "Enter display event count filter");
 865                         break;
 866                 case 'F':
 867                         prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
 868                         break;
 869                 case 'K':
 870                         hide_kernel_symbols = !hide_kernel_symbols;
 871                         break;
 872                 case 'q':
 873                 case 'Q':
 874                         printf("exiting.\n");
 875                         if (dump_symtab)
 876                                 perf_session__fprintf_dsos(session, stderr);
 877                         exit(0);
 878                 case 's':
 879                         prompt_symbol(&sym_filter_entry, "Enter details symbol");
 880                         break;
 881                 case 'S':
 882                         if (!sym_filter_entry)
 883                                 break;
 884                         else {
 885                                 struct sym_entry *syme = sym_filter_entry;
 886
 887                                 pthread_mutex_lock(&syme->src->lock);
 888                                 sym_filter_entry = NULL;
 889                                 __zero_source_counters(syme);
 890                                 pthread_mutex_unlock(&syme->src->lock);
 891                         }
 892                         break;
 893                 case 'U':
 894                         hide_user_symbols = !hide_user_symbols;
 895                         break;
 896                 case 'w':
 897                         display_weighted = ~display_weighted;
 898                         break;
 899                 case 'z':
 900                         zero = !zero;
 901                         break;
 902                 default:
 903                         break;
 904         }
 905 }
 906
 907 static void *display_thread(void *arg __used)
 908 {
 909         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 910         struct termios tc, save;
 911         int delay_msecs, c;
 912         struct perf_session *session = (struct perf_session *) arg;
 913
 914         tcgetattr(0, &save);
 915         tc = save;
 916         tc.c_lflag &= ~(ICANON | ECHO);
 917         tc.c_cc[VMIN] = 0;
 918         tc.c_cc[VTIME] = 0;
 919
 920 repeat:
 921         delay_msecs = delay_secs * 1000;
 922         tcsetattr(0, TCSANOW, &tc);
 923         /* trash return*/
 924         getc(stdin);
 925
 926         do {
 927                 print_sym_table(session);
 928         } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
 929
 930         c = getc(stdin);
 931         tcsetattr(0, TCSAFLUSH, &save);
 932
 933         handle_keypress(session, c);
 934         goto repeat;
 935
 936         return NULL;
 937 }
 938
 939 /* Tag samples to be skipped. */
 940 static const char *skip_symbols[] = {
 941         "default_idle",
 942         "native_safe_halt",
 943         "cpu_idle",
 944         "enter_idle",
 945         "exit_idle",
 946         "mwait_idle",
 947         "mwait_idle_with_hints",
 948         "poll_idle",
 949         "ppc64_runlatch_off",
 950         "pseries_dedicated_idle_sleep",
 951         NULL
 952 };
 953
 954 static int symbol_filter(struct map *map, struct symbol *sym)
 955 {
 956         struct sym_entry *syme;
 957         const char *name = sym->name;
 958         int i;
 959
 960         /*
 961          * ppc64 uses function descriptors and appends a '.' to the
 962          * start of every instruction address. Remove it.
 963          */
 964         if (name[0] == '.')
 965                 name++;
 966
 967         if (!strcmp(name, "_text") ||
 968             !strcmp(name, "_etext") ||
 969             !strcmp(name, "_sinittext") ||
 970             !strncmp("init_module", name, 11) ||
 971             !strncmp("cleanup_module", name, 14) ||
 972             strstr(name, "_text_start") ||
 973             strstr(name, "_text_end"))
 974                 return 1;
 975
 976         syme = symbol__priv(sym);
 977         syme->map = map;
 978         syme->src = NULL;
 979
 980         if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
 981                 /* schedule initial sym_filter_entry setup */
 982                 sym_filter_entry_sched = syme;
 983                 sym_filter = NULL;
 984         }
 985
 986         for (i = 0; skip_symbols[i]; i++) {
 987                 if (!strcmp(skip_symbols[i], name)) {
 988                         syme->skip = 1;
 989                         break;
 990                 }
 991         }
 992
 993         if (!syme->skip)
 994                 syme->name_len = strlen(sym->name);
 995
 996         return 0;
 997 }
 998
 999 static void event__process_sample(const event_t *self,
1000                                   struct perf_sample *sample,
1001                                   struct perf_session *session)
1002 {
1003         u64 ip = self->ip.ip;
1004         struct sym_entry *syme;
1005         struct addr_location al;
1006         struct machine *machine;
1007         u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1008
1009         ++samples;
1010
1011         switch (origin) {
1012         case PERF_RECORD_MISC_USER:
1013                 ++us_samples;
1014                 if (hide_user_symbols)
1015                         return;
1016                 machine = perf_session__find_host_machine(session);
1017                 break;
1018         case PERF_RECORD_MISC_KERNEL:
1019                 ++kernel_samples;
1020                 if (hide_kernel_symbols)
1021                         return;
1022                 machine = perf_session__find_host_machine(session);
1023                 break;
1024         case PERF_RECORD_MISC_GUEST_KERNEL:
1025                 ++guest_kernel_samples;
1026                 machine = perf_session__find_machine(session, self->ip.pid);
1027                 break;
1028         case PERF_RECORD_MISC_GUEST_USER:
1029                 ++guest_us_samples;
1030                 /*
1031                  * TODO: we don't process guest user from host side
1032                  * except simple counting.
1033                  */
1034                 return;
1035         default:
1036                 return;
1037         }
1038
1039         if (!machine && perf_guest) {
1040                 pr_err("Can't find guest [%d]'s kernel information\n",
1041                         self->ip.pid);
1042                 return;
1043         }
1044
1045         if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
1046                 exact_samples++;
1047
1048         if (event__preprocess_sample(self, session, &al, sample,
1049                                      symbol_filter) < 0 ||
1050             al.filtered)
1051                 return;
1052
1053         if (al.sym == NULL) {
1054                 /*
1055                  * As we do lazy loading of symtabs we only will know if the
1056                  * specified vmlinux file is invalid when we actually have a
1057                  * hit in kernel space and then try to load it. So if we get
1058                  * here and there are _no_ symbols in the DSO backing the
1059                  * kernel map, bail out.
1060                  *
1061                  * We may never get here, for instance, if we use -K/
1062                  * --hide-kernel-symbols, even if the user specifies an
1063                  * invalid --vmlinux ;-)
1064                  */
1065                 if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
1066                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
1067                         pr_err("The %s file can't be used\n",
1068                                symbol_conf.vmlinux_name);
1069                         exit(1);
1070                 }
1071
1072                 return;
1073         }
1074
1075         /* let's see, whether we need to install initial sym_filter_entry */
1076         if (sym_filter_entry_sched) {
1077                 sym_filter_entry = sym_filter_entry_sched;
1078                 sym_filter_entry_sched = NULL;
1079                 if (parse_source(sym_filter_entry) < 0) {
1080                         struct symbol *sym = sym_entry__symbol(sym_filter_entry);
1081
1082                         pr_err("Can't annotate %s", sym->name);
1083                         if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
1084                                 pr_err(": No vmlinux file was found in the path:\n");
1085                                 machine__fprintf_vmlinux_path(machine, stderr);
1086                         } else
1087                                 pr_err(".\n");
1088                         exit(1);
1089                 }
1090         }
1091
1092         syme = symbol__priv(al.sym);
1093         if (!syme->skip) {
1094                 struct perf_evsel *evsel;
1095
1096                 syme->origin = origin;
1097                 evsel = perf_evlist__id2evsel(evsel_list, sample->id);
1098                 assert(evsel != NULL);
1099                 syme->count[evsel->idx]++;
1100                 record_precise_ip(syme, evsel->idx, ip);
1101                 pthread_mutex_lock(&active_symbols_lock);
1102                 if (list_empty(&syme->node) || !syme->node.next)
1103                         __list_insert_active_sym(syme);
1104                 pthread_mutex_unlock(&active_symbols_lock);
1105         }
1106 }
1107
1108 static void perf_session__mmap_read_cpu(struct perf_session *self, int cpu)
1109 {
1110         struct perf_sample sample;
1111         event_t *event;
1112
1113         while ((event = perf_evlist__read_on_cpu(evsel_list, cpu)) != NULL) {
1114                 perf_session__parse_sample(self, event, &sample);
1115
1116                 if (event->header.type == PERF_RECORD_SAMPLE)
1117                         event__process_sample(event, &sample, self);
1118                 else
1119                         event__process(event, &sample, self);
1120         }
1121 }
1122
1123 static void perf_session__mmap_read(struct perf_session *self)
1124 {
1125         int i;
1126
1127         for (i = 0; i < cpus->nr; i++)
1128                 perf_session__mmap_read_cpu(self, i);
1129 }
1130
1131 static void start_counters(struct perf_evlist *evlist)
1132 {
1133         struct perf_evsel *counter;
1134
1135         list_for_each_entry(counter, &evlist->entries, node) {
1136                 struct perf_event_attr *attr = &counter->attr;
1137
1138                 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
1139
1140                 if (freq) {
1141                         attr->sample_type |= PERF_SAMPLE_PERIOD;
1142                         attr->freq        = 1;
1143                         attr->sample_freq = freq;
1144                 }
1145
1146                 if (evlist->nr_entries > 1) {
1147                         attr->sample_type |= PERF_SAMPLE_ID;
1148                         attr->read_format |= PERF_FORMAT_ID;
1149                 }
1150
1151                 attr->mmap = 1;
1152 try_again:
1153                 if (perf_evsel__open(counter, cpus, threads, group, inherit) < 0) {
1154                         int err = errno;
1155
1156                         if (err == EPERM || err == EACCES)
1157                                 die("Permission error - are you root?\n"
1158                                         "\t Consider tweaking"
1159                                         " /proc/sys/kernel/perf_event_paranoid.\n");
1160                         /*
1161                          * If it's cycles then fall back to hrtimer
1162                          * based cpu-clock-tick sw counter, which
1163                          * is always available even if no PMU support:
1164                          */
1165                         if (attr->type == PERF_TYPE_HARDWARE &&
1166                             attr->config == PERF_COUNT_HW_CPU_CYCLES) {
1167
1168                                 if (verbose)
1169                                         warning(" ... trying to fall back to cpu-clock-ticks\n");
1170
1171                                 attr->type = PERF_TYPE_SOFTWARE;
1172                                 attr->config = PERF_COUNT_SW_CPU_CLOCK;
1173                                 goto try_again;
1174                         }
1175                         printf("\n");
1176                         error("sys_perf_event_open() syscall returned with %d "
1177                               "(%s).  /bin/dmesg may provide additional information.\n",
1178                               err, strerror(err));
1179                         die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
1180                         exit(-1);
1181                 }
1182         }
1183
1184         if (perf_evlist__mmap(evlist, cpus, threads, mmap_pages, false) < 0)
1185                 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
1186 }
1187
1188 static int __cmd_top(void)
1189 {
1190         pthread_t thread;
1191         struct perf_evsel *first;
1192         int ret;
1193         /*
1194          * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1195          * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1196          */
1197         struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1198         if (session == NULL)
1199                 return -ENOMEM;
1200
1201         if (target_tid != -1)
1202                 event__synthesize_thread(target_tid, event__process, session);
1203         else
1204                 event__synthesize_threads(event__process, session);
1205
1206         start_counters(evsel_list);
1207         first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
1208         perf_session__set_sample_type(session, first->attr.sample_type);
1209
1210         /* Wait for a minimal set of events before starting the snapshot */
1211         poll(evsel_list->pollfd, evsel_list->nr_fds, 100);
1212
1213         perf_session__mmap_read(session);
1214
1215         if (pthread_create(&thread, NULL, display_thread, session)) {
1216                 printf("Could not create display thread.\n");
1217                 exit(-1);
1218         }
1219
1220         if (realtime_prio) {
1221                 struct sched_param param;
1222
1223                 param.sched_priority = realtime_prio;
1224                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1225                         printf("Could not set realtime priority.\n");
1226                         exit(-1);
1227                 }
1228         }
1229
1230         while (1) {
1231                 int hits = samples;
1232
1233                 perf_session__mmap_read(session);
1234
1235                 if (hits == samples)
1236                         ret = poll(evsel_list->pollfd, evsel_list->nr_fds, 100);
1237         }
1238
1239         return 0;
1240 }
1241
1242 static const char * const top_usage[] = {
1243         "perf top [<options>]",
1244         NULL
1245 };
1246
1247 static const struct option options[] = {
1248         OPT_CALLBACK('e', "event", &evsel_list, "event",
1249                      "event selector. use 'perf list' to list available events",
1250                      parse_events),
1251         OPT_INTEGER('c', "count", &default_interval,
1252                     "event period to sample"),
1253         OPT_INTEGER('p', "pid", &target_pid,
1254                     "profile events on existing process id"),
1255         OPT_INTEGER('t', "tid", &target_tid,
1256                     "profile events on existing thread id"),
1257         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1258                             "system-wide collection from all CPUs"),
1259         OPT_STRING('C', "cpu", &cpu_list, "cpu",
1260                     "list of cpus to monitor"),
1261         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1262                    "file", "vmlinux pathname"),
1263         OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
1264                     "hide kernel symbols"),
1265         OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1266         OPT_INTEGER('r', "realtime", &realtime_prio,
1267                     "collect data with this RT SCHED_FIFO priority"),
1268         OPT_INTEGER('d', "delay", &delay_secs,
1269                     "number of seconds to delay between refreshes"),
1270         OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1271                             "dump the symbol table used for profiling"),
1272         OPT_INTEGER('f', "count-filter", &count_filter,
1273                     "only display functions with more events than this"),
1274         OPT_BOOLEAN('g', "group", &group,
1275                             "put the counters into a counter group"),
1276         OPT_BOOLEAN('i', "inherit", &inherit,
1277                     "child tasks inherit counters"),
1278         OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1279                     "symbol to annotate"),
1280         OPT_BOOLEAN('z', "zero", &zero,
1281                     "zero history across updates"),
1282         OPT_INTEGER('F', "freq", &freq,
1283                     "profile at this frequency"),
1284         OPT_INTEGER('E', "entries", &print_entries,
1285                     "display this many functions"),
1286         OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
1287                     "hide user symbols"),
1288         OPT_INCR('v', "verbose", &verbose,
1289                     "be more verbose (show counter open errors, etc)"),
1290         OPT_END()
1291 };
1292
1293 int cmd_top(int argc, const char **argv, const char *prefix __used)
1294 {
1295         struct perf_evsel *pos;
1296         int status = -ENOMEM;
1297
1298         evsel_list = perf_evlist__new();
1299         if (evsel_list == NULL)
1300                 return -ENOMEM;
1301
1302         page_size = sysconf(_SC_PAGE_SIZE);
1303
1304         argc = parse_options(argc, argv, options, top_usage, 0);
1305         if (argc)
1306                 usage_with_options(top_usage, options);
1307
1308         if (target_pid != -1)
1309                 target_tid = target_pid;
1310
1311         threads = thread_map__new(target_pid, target_tid);
1312         if (threads == NULL) {
1313                 pr_err("Problems finding threads of monitor\n");
1314                 usage_with_options(top_usage, options);
1315         }
1316
1317         /* CPU and PID are mutually exclusive */
1318         if (target_tid > 0 && cpu_list) {
1319                 printf("WARNING: PID switch overriding CPU\n");
1320                 sleep(1);
1321                 cpu_list = NULL;
1322         }
1323
1324         if (!evsel_list->nr_entries &&
1325             perf_evlist__add_default(evsel_list) < 0) {
1326                 pr_err("Not enough memory for event selector list\n");
1327                 return -ENOMEM;
1328         }
1329
1330         if (delay_secs < 1)
1331                 delay_secs = 1;
1332
1333         /*
1334          * User specified count overrides default frequency.
1335          */
1336         if (default_interval)
1337                 freq = 0;
1338         else if (freq) {
1339                 default_interval = freq;
1340         } else {
1341                 fprintf(stderr, "frequency and count are zero, aborting\n");
1342                 exit(EXIT_FAILURE);
1343         }
1344
1345         if (target_tid != -1)
1346                 cpus = cpu_map__dummy_new();
1347         else
1348                 cpus = cpu_map__new(cpu_list);
1349
1350         if (cpus == NULL)
1351                 usage_with_options(top_usage, options);
1352
1353         list_for_each_entry(pos, &evsel_list->entries, node) {
1354                 if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
1355                         goto out_free_fd;
1356                 /*
1357                  * Fill in the ones not specifically initialized via -c:
1358                  */
1359                 if (pos->attr.sample_period)
1360                         continue;
1361
1362                 pos->attr.sample_period = default_interval;
1363         }
1364
1365         if (perf_evlist__alloc_pollfd(evsel_list, cpus->nr, threads->nr) < 0 ||
1366             perf_evlist__alloc_mmap(evsel_list, cpus->nr) < 0)
1367                 goto out_free_fd;
1368
1369         sym_evsel = list_entry(evsel_list->entries.next, struct perf_evsel, node);
1370
1371         symbol_conf.priv_size = (sizeof(struct sym_entry) +
1372                                  (evsel_list->nr_entries + 1) * sizeof(unsigned long));
1373
1374         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1375         if (symbol__init() < 0)
1376                 return -1;
1377
1378         get_term_dimensions(&winsize);
1379         if (print_entries == 0) {
1380                 update_print_entries(&winsize);
1381                 signal(SIGWINCH, sig_winch_handler);
1382         }
1383
1384         status = __cmd_top();
1385 out_free_fd:
1386         perf_evlist__delete(evsel_list);
1387
1388         return status;
1389 }