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/session.h"
  25 #include "util/symbol.h"
  26 #include "util/thread.h"
  27 #include "util/util.h"
  28 #include <linux/rbtree.h>
  29 #include "util/parse-options.h"
  30 #include "util/parse-events.h"
  31 #include "util/cpumap.h"
  32
  33 #include "util/debug.h"
  34
  35 #include <assert.h>
  36 #include <fcntl.h>
  37
  38 #include <stdio.h>
  39 #include <termios.h>
  40 #include <unistd.h>
  41
  42 #include <errno.h>
  43 #include <time.h>
  44 #include <sched.h>
  45 #include <pthread.h>
  46
  47 #include <sys/syscall.h>
  48 #include <sys/ioctl.h>
  49 #include <sys/poll.h>
  50 #include <sys/prctl.h>
  51 #include <sys/wait.h>
  52 #include <sys/uio.h>
  53 #include <sys/mman.h>
  54
  55 #include <linux/unistd.h>
  56 #include <linux/types.h>
  57
  58 static int                      *fd[MAX_NR_CPUS][MAX_COUNTERS];
  59
  60 static bool                     system_wide                     =  false;
  61
  62 static int                      default_interval                =      0;
  63
  64 static int                      count_filter                    =      5;
  65 static int                      print_entries;
  66
  67 static int                      target_pid                      =     -1;
  68 static int                      target_tid                      =     -1;
  69 static pid_t                    *all_tids                       =      NULL;
  70 static int                      thread_num                      =      0;
  71 static bool                     inherit                         =  false;
  72 static int                      profile_cpu                     =     -1;
  73 static int                      nr_cpus                         =      0;
  74 static int                      realtime_prio                   =      0;
  75 static bool                     group                           =  false;
  76 static unsigned int             page_size;
  77 static unsigned int             mmap_pages                      =     16;
  78 static int                      freq                            =   1000; /* 1 KHz */
  79
  80 static int                      delay_secs                      =      2;
  81 static bool                     zero                            =  false;
  82 static bool                     dump_symtab                     =  false;
  83
  84 static bool                     hide_kernel_symbols             =  false;
  85 static bool                     hide_user_symbols               =  false;
  86 static struct winsize           winsize;
  87
  88 /*
  89  * Source
  90  */
  91
  92 struct source_line {
  93         u64                     eip;
  94         unsigned long           count[MAX_COUNTERS];
  95         char                    *line;
  96         struct source_line      *next;
  97 };
  98
  99 static const char               *sym_filter                     =   NULL;
 100 struct sym_entry                *sym_filter_entry               =   NULL;
 101 struct sym_entry                *sym_filter_entry_sched         =   NULL;
 102 static int                      sym_pcnt_filter                 =      5;
 103 static int                      sym_counter                     =      0;
 104 static int                      display_weighted                =     -1;
 105 static const char               *cpu_list;
 106
 107 /*
 108  * Symbols
 109  */
 110
 111 struct sym_entry_source {
 112         struct source_line      *source;
 113         struct source_line      *lines;
 114         struct source_line      **lines_tail;
 115         pthread_mutex_t         lock;
 116 };
 117
 118 struct sym_entry {
 119         struct rb_node          rb_node;
 120         struct list_head        node;
 121         unsigned long           snap_count;
 122         double                  weight;
 123         int                     skip;
 124         u16                     name_len;
 125         u8                      origin;
 126         struct map              *map;
 127         struct sym_entry_source *src;
 128         unsigned long           count[0];
 129 };
 130
 131 /*
 132  * Source functions
 133  */
 134
 135 static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
 136 {
 137        return ((void *)self) + symbol_conf.priv_size;
 138 }
 139
 140 void get_term_dimensions(struct winsize *ws)
 141 {
 142         char *s = getenv("LINES");
 143
 144         if (s != NULL) {
 145                 ws->ws_row = atoi(s);
 146                 s = getenv("COLUMNS");
 147                 if (s != NULL) {
 148                         ws->ws_col = atoi(s);
 149                         if (ws->ws_row && ws->ws_col)
 150                                 return;
 151                 }
 152         }
 153 #ifdef TIOCGWINSZ
 154         if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
 155             ws->ws_row && ws->ws_col)
 156                 return;
 157 #endif
 158         ws->ws_row = 25;
 159         ws->ws_col = 80;
 160 }
 161
 162 static void update_print_entries(struct winsize *ws)
 163 {
 164         print_entries = ws->ws_row;
 165
 166         if (print_entries > 9)
 167                 print_entries -= 9;
 168 }
 169
 170 static void sig_winch_handler(int sig __used)
 171 {
 172         get_term_dimensions(&winsize);
 173         update_print_entries(&winsize);
 174 }
 175
 176 static int parse_source(struct sym_entry *syme)
 177 {
 178         struct symbol *sym;
 179         struct sym_entry_source *source;
 180         struct map *map;
 181         FILE *file;
 182         char command[PATH_MAX*2];
 183         const char *path;
 184         u64 len;
 185
 186         if (!syme)
 187                 return -1;
 188
 189         sym = sym_entry__symbol(syme);
 190         map = syme->map;
 191
 192         /*
 193          * We can't annotate with just /proc/kallsyms
 194          */
 195         if (map->dso->origin == DSO__ORIG_KERNEL)
 196                 return -1;
 197
 198         if (syme->src == NULL) {
 199                 syme->src = zalloc(sizeof(*source));
 200                 if (syme->src == NULL)
 201                         return -1;
 202                 pthread_mutex_init(&syme->src->lock, NULL);
 203         }
 204
 205         source = syme->src;
 206
 207         if (source->lines) {
 208                 pthread_mutex_lock(&source->lock);
 209                 goto out_assign;
 210         }
 211         path = map->dso->long_name;
 212
 213         len = sym->end - sym->start;
 214
 215         sprintf(command,
 216                 "objdump --start-address=%#0*Lx --stop-address=%#0*Lx -dS %s",
 217                 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
 218                 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
 219
 220         file = popen(command, "r");
 221         if (!file)
 222                 return -1;
 223
 224         pthread_mutex_lock(&source->lock);
 225         source->lines_tail = &source->lines;
 226         while (!feof(file)) {
 227                 struct source_line *src;
 228                 size_t dummy = 0;
 229                 char *c, *sep;
 230
 231                 src = malloc(sizeof(struct source_line));
 232                 assert(src != NULL);
 233                 memset(src, 0, sizeof(struct source_line));
 234
 235                 if (getline(&src->line, &dummy, file) < 0)
 236                         break;
 237                 if (!src->line)
 238                         break;
 239
 240                 c = strchr(src->line, '\n');
 241                 if (c)
 242                         *c = 0;
 243
 244                 src->next = NULL;
 245                 *source->lines_tail = src;
 246                 source->lines_tail = &src->next;
 247
 248                 src->eip = strtoull(src->line, &sep, 16);
 249                 if (*sep == ':')
 250                         src->eip = map__objdump_2ip(map, src->eip);
 251                 else /* this line has no ip info (e.g. source line) */
 252                         src->eip = 0;
 253         }
 254         pclose(file);
 255 out_assign:
 256         sym_filter_entry = syme;
 257         pthread_mutex_unlock(&source->lock);
 258         return 0;
 259 }
 260
 261 static void __zero_source_counters(struct sym_entry *syme)
 262 {
 263         int i;
 264         struct source_line *line;
 265
 266         line = syme->src->lines;
 267         while (line) {
 268                 for (i = 0; i < nr_counters; i++)
 269                         line->count[i] = 0;
 270                 line = line->next;
 271         }
 272 }
 273
 274 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
 275 {
 276         struct source_line *line;
 277
 278         if (syme != sym_filter_entry)
 279                 return;
 280
 281         if (pthread_mutex_trylock(&syme->src->lock))
 282                 return;
 283
 284         if (syme->src == NULL || syme->src->source == NULL)
 285                 goto out_unlock;
 286
 287         for (line = syme->src->lines; line; line = line->next) {
 288                 /* skip lines without IP info */
 289                 if (line->eip == 0)
 290                         continue;
 291                 if (line->eip == ip) {
 292                         line->count[counter]++;
 293                         break;
 294                 }
 295                 if (line->eip > ip)
 296                         break;
 297         }
 298 out_unlock:
 299         pthread_mutex_unlock(&syme->src->lock);
 300 }
 301
 302 #define PATTERN_LEN             (BITS_PER_LONG / 4 + 2)
 303
 304 static void lookup_sym_source(struct sym_entry *syme)
 305 {
 306         struct symbol *symbol = sym_entry__symbol(syme);
 307         struct source_line *line;
 308         char pattern[PATTERN_LEN + 1];
 309
 310         sprintf(pattern, "%0*Lx <", BITS_PER_LONG / 4,
 311                 map__rip_2objdump(syme->map, symbol->start));
 312
 313         pthread_mutex_lock(&syme->src->lock);
 314         for (line = syme->src->lines; line; line = line->next) {
 315                 if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
 316                         syme->src->source = line;
 317                         break;
 318                 }
 319         }
 320         pthread_mutex_unlock(&syme->src->lock);
 321 }
 322
 323 static void show_lines(struct source_line *queue, int count, int total)
 324 {
 325         int i;
 326         struct source_line *line;
 327
 328         line = queue;
 329         for (i = 0; i < count; i++) {
 330                 float pcnt = 100.0*(float)line->count[sym_counter]/(float)total;
 331
 332                 printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line);
 333                 line = line->next;
 334         }
 335 }
 336
 337 #define TRACE_COUNT     3
 338
 339 static void show_details(struct sym_entry *syme)
 340 {
 341         struct symbol *symbol;
 342         struct source_line *line;
 343         struct source_line *line_queue = NULL;
 344         int displayed = 0;
 345         int line_queue_count = 0, total = 0, more = 0;
 346
 347         if (!syme)
 348                 return;
 349
 350         if (!syme->src->source)
 351                 lookup_sym_source(syme);
 352
 353         if (!syme->src->source)
 354                 return;
 355
 356         symbol = sym_entry__symbol(syme);
 357         printf("Showing %s for %s\n", event_name(sym_counter), symbol->name);
 358         printf("  Events  Pcnt (>=%d%%)\n", sym_pcnt_filter);
 359
 360         pthread_mutex_lock(&syme->src->lock);
 361         line = syme->src->source;
 362         while (line) {
 363                 total += line->count[sym_counter];
 364                 line = line->next;
 365         }
 366
 367         line = syme->src->source;
 368         while (line) {
 369                 float pcnt = 0.0;
 370
 371                 if (!line_queue_count)
 372                         line_queue = line;
 373                 line_queue_count++;
 374
 375                 if (line->count[sym_counter])
 376                         pcnt = 100.0 * line->count[sym_counter] / (float)total;
 377                 if (pcnt >= (float)sym_pcnt_filter) {
 378                         if (displayed <= print_entries)
 379                                 show_lines(line_queue, line_queue_count, total);
 380                         else more++;
 381                         displayed += line_queue_count;
 382                         line_queue_count = 0;
 383                         line_queue = NULL;
 384                 } else if (line_queue_count > TRACE_COUNT) {
 385                         line_queue = line_queue->next;
 386                         line_queue_count--;
 387                 }
 388
 389                 line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8;
 390                 line = line->next;
 391         }
 392         pthread_mutex_unlock(&syme->src->lock);
 393         if (more)
 394                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 395 }
 396
 397 /*
 398  * Symbols will be added here in event__process_sample and will get out
 399  * after decayed.
 400  */
 401 static LIST_HEAD(active_symbols);
 402 static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER;
 403
 404 /*
 405  * Ordering weight: count-1 * count-2 * ... / count-n
 406  */
 407 static double sym_weight(const struct sym_entry *sym)
 408 {
 409         double weight = sym->snap_count;
 410         int counter;
 411
 412         if (!display_weighted)
 413                 return weight;
 414
 415         for (counter = 1; counter < nr_counters-1; counter++)
 416                 weight *= sym->count[counter];
 417
 418         weight /= (sym->count[counter] + 1);
 419
 420         return weight;
 421 }
 422
 423 static long                     samples;
 424 static long                     kernel_samples, us_samples;
 425 static long                     exact_samples;
 426 static long                     guest_us_samples, guest_kernel_samples;
 427 static const char               CONSOLE_CLEAR[] = "\e[H\e[2J";
 428
 429 static void __list_insert_active_sym(struct sym_entry *syme)
 430 {
 431         list_add(&syme->node, &active_symbols);
 432 }
 433
 434 static void list_remove_active_sym(struct sym_entry *syme)
 435 {
 436         pthread_mutex_lock(&active_symbols_lock);
 437         list_del_init(&syme->node);
 438         pthread_mutex_unlock(&active_symbols_lock);
 439 }
 440
 441 static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
 442 {
 443         struct rb_node **p = &tree->rb_node;
 444         struct rb_node *parent = NULL;
 445         struct sym_entry *iter;
 446
 447         while (*p != NULL) {
 448                 parent = *p;
 449                 iter = rb_entry(parent, struct sym_entry, rb_node);
 450
 451                 if (se->weight > iter->weight)
 452                         p = &(*p)->rb_left;
 453                 else
 454                         p = &(*p)->rb_right;
 455         }
 456
 457         rb_link_node(&se->rb_node, parent, p);
 458         rb_insert_color(&se->rb_node, tree);
 459 }
 460
 461 static void print_sym_table(void)
 462 {
 463         int printed = 0, j;
 464         int counter, snap = !display_weighted ? sym_counter : 0;
 465         float samples_per_sec = samples/delay_secs;
 466         float ksamples_per_sec = kernel_samples/delay_secs;
 467         float us_samples_per_sec = (us_samples)/delay_secs;
 468         float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
 469         float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
 470         float esamples_percent = (100.0*exact_samples)/samples;
 471         float sum_ksamples = 0.0;
 472         struct sym_entry *syme, *n;
 473         struct rb_root tmp = RB_ROOT;
 474         struct rb_node *nd;
 475         int sym_width = 0, dso_width = 0, dso_short_width = 0;
 476         const int win_width = winsize.ws_col - 1;
 477
 478         samples = us_samples = kernel_samples = exact_samples = 0;
 479         guest_kernel_samples = guest_us_samples = 0;
 480
 481         /* Sort the active symbols */
 482         pthread_mutex_lock(&active_symbols_lock);
 483         syme = list_entry(active_symbols.next, struct sym_entry, node);
 484         pthread_mutex_unlock(&active_symbols_lock);
 485
 486         list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
 487                 syme->snap_count = syme->count[snap];
 488                 if (syme->snap_count != 0) {
 489
 490                         if ((hide_user_symbols &&
 491                              syme->origin == PERF_RECORD_MISC_USER) ||
 492                             (hide_kernel_symbols &&
 493                              syme->origin == PERF_RECORD_MISC_KERNEL)) {
 494                                 list_remove_active_sym(syme);
 495                                 continue;
 496                         }
 497                         syme->weight = sym_weight(syme);
 498                         rb_insert_active_sym(&tmp, syme);
 499                         sum_ksamples += syme->snap_count;
 500
 501                         for (j = 0; j < nr_counters; j++)
 502                                 syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
 503                 } else
 504                         list_remove_active_sym(syme);
 505         }
 506
 507         puts(CONSOLE_CLEAR);
 508
 509         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 510         if (!perf_guest) {
 511                 printf("   PerfTop:%8.0f irqs/sec  kernel:%4.1f%%"
 512                         "  exact: %4.1f%% [",
 513                         samples_per_sec,
 514                         100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
 515                                          samples_per_sec)),
 516                         esamples_percent);
 517         } else {
 518                 printf("   PerfTop:%8.0f irqs/sec  kernel:%4.1f%% us:%4.1f%%"
 519                         " guest kernel:%4.1f%% guest us:%4.1f%%"
 520                         " exact: %4.1f%% [",
 521                         samples_per_sec,
 522                         100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
 523                                           samples_per_sec)),
 524                         100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
 525                                           samples_per_sec)),
 526                         100.0 - (100.0 * ((samples_per_sec -
 527                                                 guest_kernel_samples_per_sec) /
 528                                           samples_per_sec)),
 529                         100.0 - (100.0 * ((samples_per_sec -
 530                                            guest_us_samples_per_sec) /
 531                                           samples_per_sec)),
 532                         esamples_percent);
 533         }
 534
 535         if (nr_counters == 1 || !display_weighted) {
 536                 printf("%Ld", (u64)attrs[0].sample_period);
 537                 if (freq)
 538                         printf("Hz ");
 539                 else
 540                         printf(" ");
 541         }
 542
 543         if (!display_weighted)
 544                 printf("%s", event_name(sym_counter));
 545         else for (counter = 0; counter < nr_counters; counter++) {
 546                 if (counter)
 547                         printf("/");
 548
 549                 printf("%s", event_name(counter));
 550         }
 551
 552         printf( "], ");
 553
 554         if (target_pid != -1)
 555                 printf(" (target_pid: %d", target_pid);
 556         else if (target_tid != -1)
 557                 printf(" (target_tid: %d", target_tid);
 558         else
 559                 printf(" (all");
 560
 561         if (profile_cpu != -1)
 562                 printf(", cpu: %d)\n", profile_cpu);
 563         else {
 564                 if (target_tid != -1)
 565                         printf(")\n");
 566                 else
 567                         printf(", %d CPUs)\n", nr_cpus);
 568         }
 569
 570         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 571
 572         if (sym_filter_entry) {
 573                 show_details(sym_filter_entry);
 574                 return;
 575         }
 576
 577         /*
 578          * Find the longest symbol name that will be displayed
 579          */
 580         for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
 581                 syme = rb_entry(nd, struct sym_entry, rb_node);
 582                 if (++printed > print_entries ||
 583                     (int)syme->snap_count < count_filter)
 584                         continue;
 585
 586                 if (syme->map->dso->long_name_len > dso_width)
 587                         dso_width = syme->map->dso->long_name_len;
 588
 589                 if (syme->map->dso->short_name_len > dso_short_width)
 590                         dso_short_width = syme->map->dso->short_name_len;
 591
 592                 if (syme->name_len > sym_width)
 593                         sym_width = syme->name_len;
 594         }
 595
 596         printed = 0;
 597
 598         if (sym_width + dso_width > winsize.ws_col - 29) {
 599                 dso_width = dso_short_width;
 600                 if (sym_width + dso_width > winsize.ws_col - 29)
 601                         sym_width = winsize.ws_col - dso_width - 29;
 602         }
 603         putchar('\n');
 604         if (nr_counters == 1)
 605                 printf("             samples  pcnt");
 606         else
 607                 printf("   weight    samples  pcnt");
 608
 609         if (verbose)
 610                 printf("         RIP       ");
 611         printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
 612         printf("   %s    _______ _____",
 613                nr_counters == 1 ? "      " : "______");
 614         if (verbose)
 615                 printf(" ________________");
 616         printf(" %-*.*s", sym_width, sym_width, graph_line);
 617         printf(" %-*.*s", dso_width, dso_width, graph_line);
 618         puts("\n");
 619
 620         for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
 621                 struct symbol *sym;
 622                 double pcnt;
 623
 624                 syme = rb_entry(nd, struct sym_entry, rb_node);
 625                 sym = sym_entry__symbol(syme);
 626                 if (++printed > print_entries || (int)syme->snap_count < count_filter)
 627                         continue;
 628
 629                 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
 630                                          sum_ksamples));
 631
 632                 if (nr_counters == 1 || !display_weighted)
 633                         printf("%20.2f ", syme->weight);
 634                 else
 635                         printf("%9.1f %10ld ", syme->weight, syme->snap_count);
 636
 637                 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
 638                 if (verbose)
 639                         printf(" %016llx", sym->start);
 640                 printf(" %-*.*s", sym_width, sym_width, sym->name);
 641                 printf(" %-*.*s\n", dso_width, dso_width,
 642                        dso_width >= syme->map->dso->long_name_len ?
 643                                         syme->map->dso->long_name :
 644                                         syme->map->dso->short_name);
 645         }
 646 }
 647
 648 static void prompt_integer(int *target, const char *msg)
 649 {
 650         char *buf = malloc(0), *p;
 651         size_t dummy = 0;
 652         int tmp;
 653
 654         fprintf(stdout, "\n%s: ", msg);
 655         if (getline(&buf, &dummy, stdin) < 0)
 656                 return;
 657
 658         p = strchr(buf, '\n');
 659         if (p)
 660                 *p = 0;
 661
 662         p = buf;
 663         while(*p) {
 664                 if (!isdigit(*p))
 665                         goto out_free;
 666                 p++;
 667         }
 668         tmp = strtoul(buf, NULL, 10);
 669         *target = tmp;
 670 out_free:
 671         free(buf);
 672 }
 673
 674 static void prompt_percent(int *target, const char *msg)
 675 {
 676         int tmp = 0;
 677
 678         prompt_integer(&tmp, msg);
 679         if (tmp >= 0 && tmp <= 100)
 680                 *target = tmp;
 681 }
 682
 683 static void prompt_symbol(struct sym_entry **target, const char *msg)
 684 {
 685         char *buf = malloc(0), *p;
 686         struct sym_entry *syme = *target, *n, *found = NULL;
 687         size_t dummy = 0;
 688
 689         /* zero counters of active symbol */
 690         if (syme) {
 691                 pthread_mutex_lock(&syme->src->lock);
 692                 __zero_source_counters(syme);
 693                 *target = NULL;
 694                 pthread_mutex_unlock(&syme->src->lock);
 695         }
 696
 697         fprintf(stdout, "\n%s: ", msg);
 698         if (getline(&buf, &dummy, stdin) < 0)
 699                 goto out_free;
 700
 701         p = strchr(buf, '\n');
 702         if (p)
 703                 *p = 0;
 704
 705         pthread_mutex_lock(&active_symbols_lock);
 706         syme = list_entry(active_symbols.next, struct sym_entry, node);
 707         pthread_mutex_unlock(&active_symbols_lock);
 708
 709         list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
 710                 struct symbol *sym = sym_entry__symbol(syme);
 711
 712                 if (!strcmp(buf, sym->name)) {
 713                         found = syme;
 714                         break;
 715                 }
 716         }
 717
 718         if (!found) {
 719                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 720                 sleep(1);
 721                 return;
 722         } else
 723                 parse_source(found);
 724
 725 out_free:
 726         free(buf);
 727 }
 728
 729 static void print_mapped_keys(void)
 730 {
 731         char *name = NULL;
 732
 733         if (sym_filter_entry) {
 734                 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
 735                 name = sym->name;
 736         }
 737
 738         fprintf(stdout, "\nMapped keys:\n");
 739         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", delay_secs);
 740         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", print_entries);
 741
 742         if (nr_counters > 1)
 743                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", event_name(sym_counter));
 744
 745         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", count_filter);
 746
 747         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
 748         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 749         fprintf(stdout, "\t[S]     stop annotation.\n");
 750
 751         if (nr_counters > 1)
 752                 fprintf(stdout, "\t[w]     toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
 753
 754         fprintf(stdout,
 755                 "\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 756                 hide_kernel_symbols ? "yes" : "no");
 757         fprintf(stdout,
 758                 "\t[U]     hide user symbols.               \t(%s)\n",
 759                 hide_user_symbols ? "yes" : "no");
 760         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", zero ? 1 : 0);
 761         fprintf(stdout, "\t[qQ]    quit.\n");
 762 }
 763
 764 static int key_mapped(int c)
 765 {
 766         switch (c) {
 767                 case 'd':
 768                 case 'e':
 769                 case 'f':
 770                 case 'z':
 771                 case 'q':
 772                 case 'Q':
 773                 case 'K':
 774                 case 'U':
 775                 case 'F':
 776                 case 's':
 777                 case 'S':
 778                         return 1;
 779                 case 'E':
 780                 case 'w':
 781                         return nr_counters > 1 ? 1 : 0;
 782                 default:
 783                         break;
 784         }
 785
 786         return 0;
 787 }
 788
 789 static void handle_keypress(struct perf_session *session, int c)
 790 {
 791         if (!key_mapped(c)) {
 792                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 793                 struct termios tc, save;
 794
 795                 print_mapped_keys();
 796                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 797                 fflush(stdout);
 798
 799                 tcgetattr(0, &save);
 800                 tc = save;
 801                 tc.c_lflag &= ~(ICANON | ECHO);
 802                 tc.c_cc[VMIN] = 0;
 803                 tc.c_cc[VTIME] = 0;
 804                 tcsetattr(0, TCSANOW, &tc);
 805
 806                 poll(&stdin_poll, 1, -1);
 807                 c = getc(stdin);
 808
 809                 tcsetattr(0, TCSAFLUSH, &save);
 810                 if (!key_mapped(c))
 811                         return;
 812         }
 813
 814         switch (c) {
 815                 case 'd':
 816                         prompt_integer(&delay_secs, "Enter display delay");
 817                         if (delay_secs < 1)
 818                                 delay_secs = 1;
 819                         break;
 820                 case 'e':
 821                         prompt_integer(&print_entries, "Enter display entries (lines)");
 822                         if (print_entries == 0) {
 823                                 sig_winch_handler(SIGWINCH);
 824                                 signal(SIGWINCH, sig_winch_handler);
 825                         } else
 826                                 signal(SIGWINCH, SIG_DFL);
 827                         break;
 828                 case 'E':
 829                         if (nr_counters > 1) {
 830                                 int i;
 831
 832                                 fprintf(stderr, "\nAvailable events:");
 833                                 for (i = 0; i < nr_counters; i++)
 834                                         fprintf(stderr, "\n\t%d %s", i, event_name(i));
 835
 836                                 prompt_integer(&sym_counter, "Enter details event counter");
 837
 838                                 if (sym_counter >= nr_counters) {
 839                                         fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(0));
 840                                         sym_counter = 0;
 841                                         sleep(1);
 842                                 }
 843                         } else sym_counter = 0;
 844                         break;
 845                 case 'f':
 846                         prompt_integer(&count_filter, "Enter display event count filter");
 847                         break;
 848                 case 'F':
 849                         prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
 850                         break;
 851                 case 'K':
 852                         hide_kernel_symbols = !hide_kernel_symbols;
 853                         break;
 854                 case 'q':
 855                 case 'Q':
 856                         printf("exiting.\n");
 857                         if (dump_symtab)
 858                                 perf_session__fprintf_dsos(session, stderr);
 859                         exit(0);
 860                 case 's':
 861                         prompt_symbol(&sym_filter_entry, "Enter details symbol");
 862                         break;
 863                 case 'S':
 864                         if (!sym_filter_entry)
 865                                 break;
 866                         else {
 867                                 struct sym_entry *syme = sym_filter_entry;
 868
 869                                 pthread_mutex_lock(&syme->src->lock);
 870                                 sym_filter_entry = NULL;
 871                                 __zero_source_counters(syme);
 872                                 pthread_mutex_unlock(&syme->src->lock);
 873                         }
 874                         break;
 875                 case 'U':
 876                         hide_user_symbols = !hide_user_symbols;
 877                         break;
 878                 case 'w':
 879                         display_weighted = ~display_weighted;
 880                         break;
 881                 case 'z':
 882                         zero = !zero;
 883                         break;
 884                 default:
 885                         break;
 886         }
 887 }
 888
 889 static void *display_thread(void *arg __used)
 890 {
 891         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 892         struct termios tc, save;
 893         int delay_msecs, c;
 894         struct perf_session *session = (struct perf_session *) arg;
 895
 896         tcgetattr(0, &save);
 897         tc = save;
 898         tc.c_lflag &= ~(ICANON | ECHO);
 899         tc.c_cc[VMIN] = 0;
 900         tc.c_cc[VTIME] = 0;
 901
 902 repeat:
 903         delay_msecs = delay_secs * 1000;
 904         tcsetattr(0, TCSANOW, &tc);
 905         /* trash return*/
 906         getc(stdin);
 907
 908         do {
 909                 print_sym_table();
 910         } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
 911
 912         c = getc(stdin);
 913         tcsetattr(0, TCSAFLUSH, &save);
 914
 915         handle_keypress(session, c);
 916         goto repeat;
 917
 918         return NULL;
 919 }
 920
 921 /* Tag samples to be skipped. */
 922 static const char *skip_symbols[] = {
 923         "default_idle",
 924         "cpu_idle",
 925         "enter_idle",
 926         "exit_idle",
 927         "mwait_idle",
 928         "mwait_idle_with_hints",
 929         "poll_idle",
 930         "ppc64_runlatch_off",
 931         "pseries_dedicated_idle_sleep",
 932         NULL
 933 };
 934
 935 static int symbol_filter(struct map *map, struct symbol *sym)
 936 {
 937         struct sym_entry *syme;
 938         const char *name = sym->name;
 939         int i;
 940
 941         /*
 942          * ppc64 uses function descriptors and appends a '.' to the
 943          * start of every instruction address. Remove it.
 944          */
 945         if (name[0] == '.')
 946                 name++;
 947
 948         if (!strcmp(name, "_text") ||
 949             !strcmp(name, "_etext") ||
 950             !strcmp(name, "_sinittext") ||
 951             !strncmp("init_module", name, 11) ||
 952             !strncmp("cleanup_module", name, 14) ||
 953             strstr(name, "_text_start") ||
 954             strstr(name, "_text_end"))
 955                 return 1;
 956
 957         syme = symbol__priv(sym);
 958         syme->map = map;
 959         syme->src = NULL;
 960
 961         if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
 962                 /* schedule initial sym_filter_entry setup */
 963                 sym_filter_entry_sched = syme;
 964                 sym_filter = NULL;
 965         }
 966
 967         for (i = 0; skip_symbols[i]; i++) {
 968                 if (!strcmp(skip_symbols[i], name)) {
 969                         syme->skip = 1;
 970                         break;
 971                 }
 972         }
 973
 974         if (!syme->skip)
 975                 syme->name_len = strlen(sym->name);
 976
 977         return 0;
 978 }
 979
 980 static void event__process_sample(const event_t *self,
 981                                  struct perf_session *session, int counter)
 982 {
 983         u64 ip = self->ip.ip;
 984         struct sym_entry *syme;
 985         struct addr_location al;
 986         struct sample_data data;
 987         struct machine *machine;
 988         u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 989
 990         ++samples;
 991
 992         switch (origin) {
 993         case PERF_RECORD_MISC_USER:
 994                 ++us_samples;
 995                 if (hide_user_symbols)
 996                         return;
 997                 machine = perf_session__find_host_machine(session);
 998                 break;
 999         case PERF_RECORD_MISC_KERNEL:
1000                 ++kernel_samples;
1001                 if (hide_kernel_symbols)
1002                         return;
1003                 machine = perf_session__find_host_machine(session);
1004                 break;
1005         case PERF_RECORD_MISC_GUEST_KERNEL:
1006                 ++guest_kernel_samples;
1007                 machine = perf_session__find_machine(session, self->ip.pid);
1008                 break;
1009         case PERF_RECORD_MISC_GUEST_USER:
1010                 ++guest_us_samples;
1011                 /*
1012                  * TODO: we don't process guest user from host side
1013                  * except simple counting.
1014                  */
1015                 return;
1016         default:
1017                 return;
1018         }
1019
1020         if (!machine && perf_guest) {
1021                 pr_err("Can't find guest [%d]'s kernel information\n",
1022                         self->ip.pid);
1023                 return;
1024         }
1025
1026         if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
1027                 exact_samples++;
1028
1029         if (event__preprocess_sample(self, session, &al, &data,
1030                                      symbol_filter) < 0 ||
1031             al.filtered)
1032                 return;
1033
1034         if (al.sym == NULL) {
1035                 /*
1036                  * As we do lazy loading of symtabs we only will know if the
1037                  * specified vmlinux file is invalid when we actually have a
1038                  * hit in kernel space and then try to load it. So if we get
1039                  * here and there are _no_ symbols in the DSO backing the
1040                  * kernel map, bail out.
1041                  *
1042                  * We may never get here, for instance, if we use -K/
1043                  * --hide-kernel-symbols, even if the user specifies an
1044                  * invalid --vmlinux ;-)
1045                  */
1046                 if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
1047                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
1048                         pr_err("The %s file can't be used\n",
1049                                symbol_conf.vmlinux_name);
1050                         exit(1);
1051                 }
1052
1053                 return;
1054         }
1055
1056         /* let's see, whether we need to install initial sym_filter_entry */
1057         if (sym_filter_entry_sched) {
1058                 sym_filter_entry = sym_filter_entry_sched;
1059                 sym_filter_entry_sched = NULL;
1060                 if (parse_source(sym_filter_entry) < 0) {
1061                         struct symbol *sym = sym_entry__symbol(sym_filter_entry);
1062
1063                         pr_err("Can't annotate %s", sym->name);
1064                         if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
1065                                 pr_err(": No vmlinux file was found in the path:\n");
1066                                 machine__fprintf_vmlinux_path(machine, stderr);
1067                         } else
1068                                 pr_err(".\n");
1069                         exit(1);
1070                 }
1071         }
1072
1073         syme = symbol__priv(al.sym);
1074         if (!syme->skip) {
1075                 syme->count[counter]++;
1076                 syme->origin = origin;
1077                 record_precise_ip(syme, counter, ip);
1078                 pthread_mutex_lock(&active_symbols_lock);
1079                 if (list_empty(&syme->node) || !syme->node.next)
1080                         __list_insert_active_sym(syme);
1081                 pthread_mutex_unlock(&active_symbols_lock);
1082         }
1083 }
1084
1085 struct mmap_data {
1086         int                     counter;
1087         void                    *base;
1088         int                     mask;
1089         unsigned int            prev;
1090 };
1091
1092 static unsigned int mmap_read_head(struct mmap_data *md)
1093 {
1094         struct perf_event_mmap_page *pc = md->base;
1095         int head;
1096
1097         head = pc->data_head;
1098         rmb();
1099
1100         return head;
1101 }
1102
1103 static void perf_session__mmap_read_counter(struct perf_session *self,
1104                                             struct mmap_data *md)
1105 {
1106         unsigned int head = mmap_read_head(md);
1107         unsigned int old = md->prev;
1108         unsigned char *data = md->base + page_size;
1109         int diff;
1110
1111         /*
1112          * If we're further behind than half the buffer, there's a chance
1113          * the writer will bite our tail and mess up the samples under us.
1114          *
1115          * If we somehow ended up ahead of the head, we got messed up.
1116          *
1117          * In either case, truncate and restart at head.
1118          */
1119         diff = head - old;
1120         if (diff > md->mask / 2 || diff < 0) {
1121                 fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
1122
1123                 /*
1124                  * head points to a known good entry, start there.
1125                  */
1126                 old = head;
1127         }
1128
1129         for (; old != head;) {
1130                 event_t *event = (event_t *)&data[old & md->mask];
1131
1132                 event_t event_copy;
1133
1134                 size_t size = event->header.size;
1135
1136                 /*
1137                  * Event straddles the mmap boundary -- header should always
1138                  * be inside due to u64 alignment of output.
1139                  */
1140                 if ((old & md->mask) + size != ((old + size) & md->mask)) {
1141                         unsigned int offset = old;
1142                         unsigned int len = min(sizeof(*event), size), cpy;
1143                         void *dst = &event_copy;
1144
1145                         do {
1146                                 cpy = min(md->mask + 1 - (offset & md->mask), len);
1147                                 memcpy(dst, &data[offset & md->mask], cpy);
1148                                 offset += cpy;
1149                                 dst += cpy;
1150                                 len -= cpy;
1151                         } while (len);
1152
1153                         event = &event_copy;
1154                 }
1155
1156                 if (event->header.type == PERF_RECORD_SAMPLE)
1157                         event__process_sample(event, self, md->counter);
1158                 else
1159                         event__process(event, self);
1160                 old += size;
1161         }
1162
1163         md->prev = old;
1164 }
1165
1166 static struct pollfd *event_array;
1167 static struct mmap_data *mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
1168
1169 static void perf_session__mmap_read(struct perf_session *self)
1170 {
1171         int i, counter, thread_index;
1172
1173         for (i = 0; i < nr_cpus; i++) {
1174                 for (counter = 0; counter < nr_counters; counter++)
1175                         for (thread_index = 0;
1176                                 thread_index < thread_num;
1177                                 thread_index++) {
1178                                 perf_session__mmap_read_counter(self,
1179                                         &mmap_array[i][counter][thread_index]);
1180                         }
1181         }
1182 }
1183
1184 int nr_poll;
1185 int group_fd;
1186
1187 static void start_counter(int i, int counter)
1188 {
1189         struct perf_event_attr *attr;
1190         int cpu;
1191         int thread_index;
1192
1193         cpu = profile_cpu;
1194         if (target_tid == -1 && profile_cpu == -1)
1195                 cpu = cpumap[i];
1196
1197         attr = attrs + counter;
1198
1199         attr->sample_type       = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
1200
1201         if (freq) {
1202                 attr->sample_type       |= PERF_SAMPLE_PERIOD;
1203                 attr->freq              = 1;
1204                 attr->sample_freq       = freq;
1205         }
1206
1207         attr->inherit           = (cpu < 0) && inherit;
1208         attr->mmap              = 1;
1209
1210         for (thread_index = 0; thread_index < thread_num; thread_index++) {
1211 try_again:
1212                 fd[i][counter][thread_index] = sys_perf_event_open(attr,
1213                                 all_tids[thread_index], cpu, group_fd, 0);
1214
1215                 if (fd[i][counter][thread_index] < 0) {
1216                         int err = errno;
1217
1218                         if (err == EPERM || err == EACCES)
1219                                 die("No permission - are you root?\n");
1220                         /*
1221                          * If it's cycles then fall back to hrtimer
1222                          * based cpu-clock-tick sw counter, which
1223                          * is always available even if no PMU support:
1224                          */
1225                         if (attr->type == PERF_TYPE_HARDWARE
1226                                         && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
1227
1228                                 if (verbose)
1229                                         warning(" ... trying to fall back to cpu-clock-ticks\n");
1230
1231                                 attr->type = PERF_TYPE_SOFTWARE;
1232                                 attr->config = PERF_COUNT_SW_CPU_CLOCK;
1233                                 goto try_again;
1234                         }
1235                         printf("\n");
1236                         error("perfcounter syscall returned with %d (%s)\n",
1237                                         fd[i][counter][thread_index], strerror(err));
1238                         die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
1239                         exit(-1);
1240                 }
1241                 assert(fd[i][counter][thread_index] >= 0);
1242                 fcntl(fd[i][counter][thread_index], F_SETFL, O_NONBLOCK);
1243
1244                 /*
1245                  * First counter acts as the group leader:
1246                  */
1247                 if (group && group_fd == -1)
1248                         group_fd = fd[i][counter][thread_index];
1249
1250                 event_array[nr_poll].fd = fd[i][counter][thread_index];
1251                 event_array[nr_poll].events = POLLIN;
1252                 nr_poll++;
1253
1254                 mmap_array[i][counter][thread_index].counter = counter;
1255                 mmap_array[i][counter][thread_index].prev = 0;
1256                 mmap_array[i][counter][thread_index].mask = mmap_pages*page_size - 1;
1257                 mmap_array[i][counter][thread_index].base = mmap(NULL, (mmap_pages+1)*page_size,
1258                                 PROT_READ, MAP_SHARED, fd[i][counter][thread_index], 0);
1259                 if (mmap_array[i][counter][thread_index].base == MAP_FAILED)
1260                         die("failed to mmap with %d (%s)\n", errno, strerror(errno));
1261         }
1262 }
1263
1264 static int __cmd_top(void)
1265 {
1266         pthread_t thread;
1267         int i, counter;
1268         int ret;
1269         /*
1270          * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1271          * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1272          */
1273         struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false);
1274         if (session == NULL)
1275                 return -ENOMEM;
1276
1277         if (target_tid != -1)
1278                 event__synthesize_thread(target_tid, event__process, session);
1279         else
1280                 event__synthesize_threads(event__process, session);
1281
1282         for (i = 0; i < nr_cpus; i++) {
1283                 group_fd = -1;
1284                 for (counter = 0; counter < nr_counters; counter++)
1285                         start_counter(i, counter);
1286         }
1287
1288         /* Wait for a minimal set of events before starting the snapshot */
1289         poll(&event_array[0], nr_poll, 100);
1290
1291         perf_session__mmap_read(session);
1292
1293         if (pthread_create(&thread, NULL, display_thread, session)) {
1294                 printf("Could not create display thread.\n");
1295                 exit(-1);
1296         }
1297
1298         if (realtime_prio) {
1299                 struct sched_param param;
1300
1301                 param.sched_priority = realtime_prio;
1302                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1303                         printf("Could not set realtime priority.\n");
1304                         exit(-1);
1305                 }
1306         }
1307
1308         while (1) {
1309                 int hits = samples;
1310
1311                 perf_session__mmap_read(session);
1312
1313                 if (hits == samples)
1314                         ret = poll(event_array, nr_poll, 100);
1315         }
1316
1317         return 0;
1318 }
1319
1320 static const char * const top_usage[] = {
1321         "perf top [<options>]",
1322         NULL
1323 };
1324
1325 static const struct option options[] = {
1326         OPT_CALLBACK('e', "event", NULL, "event",
1327                      "event selector. use 'perf list' to list available events",
1328                      parse_events),
1329         OPT_INTEGER('c', "count", &default_interval,
1330                     "event period to sample"),
1331         OPT_INTEGER('p', "pid", &target_pid,
1332                     "profile events on existing process id"),
1333         OPT_INTEGER('t', "tid", &target_tid,
1334                     "profile events on existing thread id"),
1335         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1336                             "system-wide collection from all CPUs"),
1337         OPT_STRING('C', "cpu", &cpu_list, "cpu",
1338                     "list of cpus to monitor"),
1339         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1340                    "file", "vmlinux pathname"),
1341         OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
1342                     "hide kernel symbols"),
1343         OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1344         OPT_INTEGER('r', "realtime", &realtime_prio,
1345                     "collect data with this RT SCHED_FIFO priority"),
1346         OPT_INTEGER('d', "delay", &delay_secs,
1347                     "number of seconds to delay between refreshes"),
1348         OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1349                             "dump the symbol table used for profiling"),
1350         OPT_INTEGER('f', "count-filter", &count_filter,
1351                     "only display functions with more events than this"),
1352         OPT_BOOLEAN('g', "group", &group,
1353                             "put the counters into a counter group"),
1354         OPT_BOOLEAN('i', "inherit", &inherit,
1355                     "child tasks inherit counters"),
1356         OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1357                     "symbol to annotate"),
1358         OPT_BOOLEAN('z', "zero", &zero,
1359                     "zero history across updates"),
1360         OPT_INTEGER('F', "freq", &freq,
1361                     "profile at this frequency"),
1362         OPT_INTEGER('E', "entries", &print_entries,
1363                     "display this many functions"),
1364         OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
1365                     "hide user symbols"),
1366         OPT_INCR('v', "verbose", &verbose,
1367                     "be more verbose (show counter open errors, etc)"),
1368         OPT_END()
1369 };
1370
1371 int cmd_top(int argc, const char **argv, const char *prefix __used)
1372 {
1373         int counter;
1374         int i,j;
1375
1376         page_size = sysconf(_SC_PAGE_SIZE);
1377
1378         argc = parse_options(argc, argv, options, top_usage, 0);
1379         if (argc)
1380                 usage_with_options(top_usage, options);
1381
1382         if (target_pid != -1) {
1383                 target_tid = target_pid;
1384                 thread_num = find_all_tid(target_pid, &all_tids);
1385                 if (thread_num <= 0) {
1386                         fprintf(stderr, "Can't find all threads of pid %d\n",
1387                                 target_pid);
1388                         usage_with_options(top_usage, options);
1389                 }
1390         } else {
1391                 all_tids=malloc(sizeof(pid_t));
1392                 if (!all_tids)
1393                         return -ENOMEM;
1394
1395                 all_tids[0] = target_tid;
1396                 thread_num = 1;
1397         }
1398
1399         for (i = 0; i < MAX_NR_CPUS; i++) {
1400                 for (j = 0; j < MAX_COUNTERS; j++) {
1401                         fd[i][j] = malloc(sizeof(int)*thread_num);
1402                         mmap_array[i][j] = zalloc(
1403                                 sizeof(struct mmap_data)*thread_num);
1404                         if (!fd[i][j] || !mmap_array[i][j])
1405                                 return -ENOMEM;
1406                 }
1407         }
1408         event_array = malloc(
1409                 sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
1410         if (!event_array)
1411                 return -ENOMEM;
1412
1413         /* CPU and PID are mutually exclusive */
1414         if (target_tid > 0 && cpu_list) {
1415                 printf("WARNING: PID switch overriding CPU\n");
1416                 sleep(1);
1417                 cpu_list = NULL;
1418         }
1419
1420         if (!nr_counters)
1421                 nr_counters = 1;
1422
1423         symbol_conf.priv_size = (sizeof(struct sym_entry) +
1424                                  (nr_counters + 1) * sizeof(unsigned long));
1425
1426         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1427         if (symbol__init() < 0)
1428                 return -1;
1429
1430         if (delay_secs < 1)
1431                 delay_secs = 1;
1432
1433         /*
1434          * User specified count overrides default frequency.
1435          */
1436         if (default_interval)
1437                 freq = 0;
1438         else if (freq) {
1439                 default_interval = freq;
1440         } else {
1441                 fprintf(stderr, "frequency and count are zero, aborting\n");
1442                 exit(EXIT_FAILURE);
1443         }
1444
1445         /*
1446          * Fill in the ones not specifically initialized via -c:
1447          */
1448         for (counter = 0; counter < nr_counters; counter++) {
1449                 if (attrs[counter].sample_period)
1450                         continue;
1451
1452                 attrs[counter].sample_period = default_interval;
1453         }
1454
1455         if (target_tid != -1)
1456                 nr_cpus = 1;
1457         else
1458                 nr_cpus = read_cpu_map(cpu_list);
1459
1460         if (nr_cpus < 1)
1461                 usage_with_options(top_usage, options);
1462
1463         get_term_dimensions(&winsize);
1464         if (print_entries == 0) {
1465                 update_print_entries(&winsize);
1466                 signal(SIGWINCH, sig_winch_handler);
1467         }
1468
1469         return __cmd_top();
1470 }