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