tools/perf/builtin-report.c

   1 /*
   2  * builtin-report.c
   3  *
   4  * Builtin report command: Analyze the perf.data input file,
   5  * look up and read DSOs and symbol information and display
   6  * a histogram of results, along various sorting keys.
   7  */
   8 #include "builtin.h"
   9
  10 #include "util/util.h"
  11
  12 #include "util/color.h"
  13 #include "util/list.h"
  14 #include "util/cache.h"
  15 #include "util/rbtree.h"
  16 #include "util/symbol.h"
  17 #include "util/string.h"
  18
  19 #include "perf.h"
  20
  21 #include "util/parse-options.h"
  22 #include "util/parse-events.h"
  23
  24 #define SHOW_KERNEL     1
  25 #define SHOW_USER       2
  26 #define SHOW_HV         4
  27
  28 static char             const *input_name = "perf.data";
  29 static char             *vmlinux = NULL;
  30
  31 static char             default_sort_order[] = "comm,dso";
  32 static char             *sort_order = default_sort_order;
  33
  34 static int              input;
  35 static int              show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
  36
  37 static int              dump_trace = 0;
  38 #define dprintf(x...)   do { if (dump_trace) printf(x); } while (0)
  39
  40 static int              verbose;
  41 static int              full_paths;
  42
  43 static unsigned long    page_size;
  44 static unsigned long    mmap_window = 32;
  45
  46 struct ip_event {
  47         struct perf_event_header header;
  48         __u64 ip;
  49         __u32 pid, tid;
  50 };
  51
  52 struct mmap_event {
  53         struct perf_event_header header;
  54         __u32 pid, tid;
  55         __u64 start;
  56         __u64 len;
  57         __u64 pgoff;
  58         char filename[PATH_MAX];
  59 };
  60
  61 struct comm_event {
  62         struct perf_event_header header;
  63         __u32 pid, tid;
  64         char comm[16];
  65 };
  66
  67 struct fork_event {
  68         struct perf_event_header header;
  69         __u32 pid, ppid;
  70 };
  71
  72 struct period_event {
  73         struct perf_event_header header;
  74         __u64 time;
  75         __u64 id;
  76         __u64 sample_period;
  77 };
  78
  79 typedef union event_union {
  80         struct perf_event_header        header;
  81         struct ip_event                 ip;
  82         struct mmap_event               mmap;
  83         struct comm_event               comm;
  84         struct fork_event               fork;
  85         struct period_event             period;
  86 } event_t;
  87
  88 static LIST_HEAD(dsos);
  89 static struct dso *kernel_dso;
  90 static struct dso *vdso;
  91
  92 static void dsos__add(struct dso *dso)
  93 {
  94         list_add_tail(&dso->node, &dsos);
  95 }
  96
  97 static struct dso *dsos__find(const char *name)
  98 {
  99         struct dso *pos;
 100
 101         list_for_each_entry(pos, &dsos, node)
 102                 if (strcmp(pos->name, name) == 0)
 103                         return pos;
 104         return NULL;
 105 }
 106
 107 static struct dso *dsos__findnew(const char *name)
 108 {
 109         struct dso *dso = dsos__find(name);
 110         int nr;
 111
 112         if (dso)
 113                 return dso;
 114
 115         dso = dso__new(name, 0);
 116         if (!dso)
 117                 goto out_delete_dso;
 118
 119         nr = dso__load(dso, NULL, verbose);
 120         if (nr < 0) {
 121                 if (verbose)
 122                         fprintf(stderr, "Failed to open: %s\n", name);
 123                 goto out_delete_dso;
 124         }
 125         if (!nr && verbose) {
 126                 fprintf(stderr,
 127                 "No symbols found in: %s, maybe install a debug package?\n",
 128                                 name);
 129         }
 130
 131         dsos__add(dso);
 132
 133         return dso;
 134
 135 out_delete_dso:
 136         dso__delete(dso);
 137         return NULL;
 138 }
 139
 140 static void dsos__fprintf(FILE *fp)
 141 {
 142         struct dso *pos;
 143
 144         list_for_each_entry(pos, &dsos, node)
 145                 dso__fprintf(pos, fp);
 146 }
 147
 148 static struct symbol *vdso__find_symbol(struct dso *dso, uint64_t ip)
 149 {
 150         return dso__find_symbol(kernel_dso, ip);
 151 }
 152
 153 static int load_kernel(void)
 154 {
 155         int err;
 156
 157         kernel_dso = dso__new("[kernel]", 0);
 158         if (!kernel_dso)
 159                 return -1;
 160
 161         err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
 162         if (err) {
 163                 dso__delete(kernel_dso);
 164                 kernel_dso = NULL;
 165         } else
 166                 dsos__add(kernel_dso);
 167
 168         vdso = dso__new("[vdso]", 0);
 169         if (!vdso)
 170                 return -1;
 171
 172         vdso->find_symbol = vdso__find_symbol;
 173
 174         dsos__add(vdso);
 175
 176         return err;
 177 }
 178
 179 static char __cwd[PATH_MAX];
 180 static char *cwd = __cwd;
 181 static int cwdlen;
 182
 183 static int strcommon(const char *pathname)
 184 {
 185         int n = 0;
 186
 187         while (pathname[n] == cwd[n] && n < cwdlen)
 188                 ++n;
 189
 190         return n;
 191 }
 192
 193 struct map {
 194         struct list_head node;
 195         uint64_t         start;
 196         uint64_t         end;
 197         uint64_t         pgoff;
 198         uint64_t         (*map_ip)(struct map *, uint64_t);
 199         struct dso       *dso;
 200 };
 201
 202 static uint64_t map__map_ip(struct map *map, uint64_t ip)
 203 {
 204         return ip - map->start + map->pgoff;
 205 }
 206
 207 static uint64_t vdso__map_ip(struct map *map, uint64_t ip)
 208 {
 209         return ip;
 210 }
 211
 212 static inline int is_anon_memory(const char *filename)
 213 {
 214      return strcmp(filename, "//anon") == 0;
 215 }
 216
 217 static struct map *map__new(struct mmap_event *event)
 218 {
 219         struct map *self = malloc(sizeof(*self));
 220
 221         if (self != NULL) {
 222                 const char *filename = event->filename;
 223                 char newfilename[PATH_MAX];
 224                 int anon;
 225
 226                 if (cwd) {
 227                         int n = strcommon(filename);
 228
 229                         if (n == cwdlen) {
 230                                 snprintf(newfilename, sizeof(newfilename),
 231                                          ".%s", filename + n);
 232                                 filename = newfilename;
 233                         }
 234                 }
 235
 236                 anon = is_anon_memory(filename);
 237
 238                 if (anon) {
 239                         snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
 240                         filename = newfilename;
 241                 }
 242
 243                 self->start = event->start;
 244                 self->end   = event->start + event->len;
 245                 self->pgoff = event->pgoff;
 246
 247                 self->dso = dsos__findnew(filename);
 248                 if (self->dso == NULL)
 249                         goto out_delete;
 250
 251                 if (self->dso == vdso || anon)
 252                         self->map_ip = vdso__map_ip;
 253                 else
 254                         self->map_ip = map__map_ip;
 255         }
 256         return self;
 257 out_delete:
 258         free(self);
 259         return NULL;
 260 }
 261
 262 static struct map *map__clone(struct map *self)
 263 {
 264         struct map *map = malloc(sizeof(*self));
 265
 266         if (!map)
 267                 return NULL;
 268
 269         memcpy(map, self, sizeof(*self));
 270
 271         return map;
 272 }
 273
 274 static int map__overlap(struct map *l, struct map *r)
 275 {
 276         if (l->start > r->start) {
 277                 struct map *t = l;
 278                 l = r;
 279                 r = t;
 280         }
 281
 282         if (l->end > r->start)
 283                 return 1;
 284
 285         return 0;
 286 }
 287
 288 static size_t map__fprintf(struct map *self, FILE *fp)
 289 {
 290         return fprintf(fp, " %"PRIx64"-%"PRIx64" %"PRIx64" %s\n",
 291                        self->start, self->end, self->pgoff, self->dso->name);
 292 }
 293
 294
 295 struct thread {
 296         struct rb_node   rb_node;
 297         struct list_head maps;
 298         pid_t            pid;
 299         char             *comm;
 300 };
 301
 302 static struct thread *thread__new(pid_t pid)
 303 {
 304         struct thread *self = malloc(sizeof(*self));
 305
 306         if (self != NULL) {
 307                 self->pid = pid;
 308                 self->comm = malloc(32);
 309                 if (self->comm)
 310                         snprintf(self->comm, 32, ":%d", self->pid);
 311                 INIT_LIST_HEAD(&self->maps);
 312         }
 313
 314         return self;
 315 }
 316
 317 static int thread__set_comm(struct thread *self, const char *comm)
 318 {
 319         if (self->comm)
 320                 free(self->comm);
 321         self->comm = strdup(comm);
 322         return self->comm ? 0 : -ENOMEM;
 323 }
 324
 325 static size_t thread__fprintf(struct thread *self, FILE *fp)
 326 {
 327         struct map *pos;
 328         size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
 329
 330         list_for_each_entry(pos, &self->maps, node)
 331                 ret += map__fprintf(pos, fp);
 332
 333         return ret;
 334 }
 335
 336
 337 static struct rb_root threads;
 338 static struct thread *last_match;
 339
 340 static struct thread *threads__findnew(pid_t pid)
 341 {
 342         struct rb_node **p = &threads.rb_node;
 343         struct rb_node *parent = NULL;
 344         struct thread *th;
 345
 346         /*
 347          * Font-end cache - PID lookups come in blocks,
 348          * so most of the time we dont have to look up
 349          * the full rbtree:
 350          */
 351         if (last_match && last_match->pid == pid)
 352                 return last_match;
 353
 354         while (*p != NULL) {
 355                 parent = *p;
 356                 th = rb_entry(parent, struct thread, rb_node);
 357
 358                 if (th->pid == pid) {
 359                         last_match = th;
 360                         return th;
 361                 }
 362
 363                 if (pid < th->pid)
 364                         p = &(*p)->rb_left;
 365                 else
 366                         p = &(*p)->rb_right;
 367         }
 368
 369         th = thread__new(pid);
 370         if (th != NULL) {
 371                 rb_link_node(&th->rb_node, parent, p);
 372                 rb_insert_color(&th->rb_node, &threads);
 373                 last_match = th;
 374         }
 375
 376         return th;
 377 }
 378
 379 static void thread__insert_map(struct thread *self, struct map *map)
 380 {
 381         struct map *pos, *tmp;
 382
 383         list_for_each_entry_safe(pos, tmp, &self->maps, node) {
 384                 if (map__overlap(pos, map)) {
 385                         list_del_init(&pos->node);
 386                         /* XXX leaks dsos */
 387                         free(pos);
 388                 }
 389         }
 390
 391         list_add_tail(&map->node, &self->maps);
 392 }
 393
 394 static int thread__fork(struct thread *self, struct thread *parent)
 395 {
 396         struct map *map;
 397
 398         if (self->comm)
 399                 free(self->comm);
 400         self->comm = strdup(parent->comm);
 401         if (!self->comm)
 402                 return -ENOMEM;
 403
 404         list_for_each_entry(map, &parent->maps, node) {
 405                 struct map *new = map__clone(map);
 406                 if (!new)
 407                         return -ENOMEM;
 408                 thread__insert_map(self, new);
 409         }
 410
 411         return 0;
 412 }
 413
 414 static struct map *thread__find_map(struct thread *self, uint64_t ip)
 415 {
 416         struct map *pos;
 417
 418         if (self == NULL)
 419                 return NULL;
 420
 421         list_for_each_entry(pos, &self->maps, node)
 422                 if (ip >= pos->start && ip <= pos->end)
 423                         return pos;
 424
 425         return NULL;
 426 }
 427
 428 static size_t threads__fprintf(FILE *fp)
 429 {
 430         size_t ret = 0;
 431         struct rb_node *nd;
 432
 433         for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
 434                 struct thread *pos = rb_entry(nd, struct thread, rb_node);
 435
 436                 ret += thread__fprintf(pos, fp);
 437         }
 438
 439         return ret;
 440 }
 441
 442 /*
 443  * histogram, sorted on item, collects counts
 444  */
 445
 446 static struct rb_root hist;
 447
 448 struct hist_entry {
 449         struct rb_node   rb_node;
 450
 451         struct thread    *thread;
 452         struct map       *map;
 453         struct dso       *dso;
 454         struct symbol    *sym;
 455         uint64_t         ip;
 456         char             level;
 457
 458         uint32_t         count;
 459 };
 460
 461 /*
 462  * configurable sorting bits
 463  */
 464
 465 struct sort_entry {
 466         struct list_head list;
 467
 468         char *header;
 469
 470         int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
 471         int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
 472         size_t  (*print)(FILE *fp, struct hist_entry *);
 473 };
 474
 475 /* --sort pid */
 476
 477 static int64_t
 478 sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
 479 {
 480         return right->thread->pid - left->thread->pid;
 481 }
 482
 483 static size_t
 484 sort__thread_print(FILE *fp, struct hist_entry *self)
 485 {
 486         return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
 487 }
 488
 489 static struct sort_entry sort_thread = {
 490         .header = "         Command:  Pid",
 491         .cmp    = sort__thread_cmp,
 492         .print  = sort__thread_print,
 493 };
 494
 495 /* --sort comm */
 496
 497 static int64_t
 498 sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
 499 {
 500         return right->thread->pid - left->thread->pid;
 501 }
 502
 503 static int64_t
 504 sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
 505 {
 506         char *comm_l = left->thread->comm;
 507         char *comm_r = right->thread->comm;
 508
 509         if (!comm_l || !comm_r) {
 510                 if (!comm_l && !comm_r)
 511                         return 0;
 512                 else if (!comm_l)
 513                         return -1;
 514                 else
 515                         return 1;
 516         }
 517
 518         return strcmp(comm_l, comm_r);
 519 }
 520
 521 static size_t
 522 sort__comm_print(FILE *fp, struct hist_entry *self)
 523 {
 524         return fprintf(fp, "%16s", self->thread->comm);
 525 }
 526
 527 static struct sort_entry sort_comm = {
 528         .header         = "         Command",
 529         .cmp            = sort__comm_cmp,
 530         .collapse       = sort__comm_collapse,
 531         .print          = sort__comm_print,
 532 };
 533
 534 /* --sort dso */
 535
 536 static int64_t
 537 sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
 538 {
 539         struct dso *dso_l = left->dso;
 540         struct dso *dso_r = right->dso;
 541
 542         if (!dso_l || !dso_r) {
 543                 if (!dso_l && !dso_r)
 544                         return 0;
 545                 else if (!dso_l)
 546                         return -1;
 547                 else
 548                         return 1;
 549         }
 550
 551         return strcmp(dso_l->name, dso_r->name);
 552 }
 553
 554 static size_t
 555 sort__dso_print(FILE *fp, struct hist_entry *self)
 556 {
 557         if (self->dso)
 558                 return fprintf(fp, "%-25s", self->dso->name);
 559
 560         return fprintf(fp, "%016llx         ", (__u64)self->ip);
 561 }
 562
 563 static struct sort_entry sort_dso = {
 564         .header = "Shared Object            ",
 565         .cmp    = sort__dso_cmp,
 566         .print  = sort__dso_print,
 567 };
 568
 569 /* --sort symbol */
 570
 571 static int64_t
 572 sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
 573 {
 574         uint64_t ip_l, ip_r;
 575
 576         if (left->sym == right->sym)
 577                 return 0;
 578
 579         ip_l = left->sym ? left->sym->start : left->ip;
 580         ip_r = right->sym ? right->sym->start : right->ip;
 581
 582         return (int64_t)(ip_r - ip_l);
 583 }
 584
 585 static size_t
 586 sort__sym_print(FILE *fp, struct hist_entry *self)
 587 {
 588         size_t ret = 0;
 589
 590         if (verbose)
 591                 ret += fprintf(fp, "%#018llx  ", (__u64)self->ip);
 592
 593         if (self->sym) {
 594                 ret += fprintf(fp, "[%c] %s",
 595                         self->dso == kernel_dso ? 'k' : '.', self->sym->name);
 596         } else {
 597                 ret += fprintf(fp, "%#016llx", (__u64)self->ip);
 598         }
 599
 600         return ret;
 601 }
 602
 603 static struct sort_entry sort_sym = {
 604         .header = "Symbol",
 605         .cmp    = sort__sym_cmp,
 606         .print  = sort__sym_print,
 607 };
 608
 609 static int sort__need_collapse = 0;
 610
 611 struct sort_dimension {
 612         char                    *name;
 613         struct sort_entry       *entry;
 614         int                     taken;
 615 };
 616
 617 static struct sort_dimension sort_dimensions[] = {
 618         { .name = "pid",        .entry = &sort_thread,  },
 619         { .name = "comm",       .entry = &sort_comm,    },
 620         { .name = "dso",        .entry = &sort_dso,     },
 621         { .name = "symbol",     .entry = &sort_sym,     },
 622 };
 623
 624 static LIST_HEAD(hist_entry__sort_list);
 625
 626 static int sort_dimension__add(char *tok)
 627 {
 628         int i;
 629
 630         for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
 631                 struct sort_dimension *sd = &sort_dimensions[i];
 632
 633                 if (sd->taken)
 634                         continue;
 635
 636                 if (strncasecmp(tok, sd->name, strlen(tok)))
 637                         continue;
 638
 639                 if (sd->entry->collapse)
 640                         sort__need_collapse = 1;
 641
 642                 list_add_tail(&sd->entry->list, &hist_entry__sort_list);
 643                 sd->taken = 1;
 644
 645                 return 0;
 646         }
 647
 648         return -ESRCH;
 649 }
 650
 651 static int64_t
 652 hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
 653 {
 654         struct sort_entry *se;
 655         int64_t cmp = 0;
 656
 657         list_for_each_entry(se, &hist_entry__sort_list, list) {
 658                 cmp = se->cmp(left, right);
 659                 if (cmp)
 660                         break;
 661         }
 662
 663         return cmp;
 664 }
 665
 666 static int64_t
 667 hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
 668 {
 669         struct sort_entry *se;
 670         int64_t cmp = 0;
 671
 672         list_for_each_entry(se, &hist_entry__sort_list, list) {
 673                 int64_t (*f)(struct hist_entry *, struct hist_entry *);
 674
 675                 f = se->collapse ?: se->cmp;
 676
 677                 cmp = f(left, right);
 678                 if (cmp)
 679                         break;
 680         }
 681
 682         return cmp;
 683 }
 684
 685 static size_t
 686 hist_entry__fprintf(FILE *fp, struct hist_entry *self, uint64_t total_samples)
 687 {
 688         struct sort_entry *se;
 689         size_t ret;
 690
 691         if (total_samples) {
 692                 double percent = self->count * 100.0 / total_samples;
 693                 char *color = PERF_COLOR_NORMAL;
 694
 695                 /*
 696                  * We color high-overhead entries in red, mid-overhead
 697                  * entries in green - and keep the low overhead places
 698                  * normal:
 699                  */
 700                 if (percent >= 5.0) {
 701                         color = PERF_COLOR_RED;
 702                 } else {
 703                         if (percent >= 0.5)
 704                                 color = PERF_COLOR_GREEN;
 705                 }
 706
 707                 ret = color_fprintf(fp, color, "   %6.2f%%",
 708                                 (self->count * 100.0) / total_samples);
 709         } else
 710                 ret = fprintf(fp, "%12d ", self->count);
 711
 712         list_for_each_entry(se, &hist_entry__sort_list, list) {
 713                 fprintf(fp, "  ");
 714                 ret += se->print(fp, self);
 715         }
 716
 717         ret += fprintf(fp, "\n");
 718
 719         return ret;
 720 }
 721
 722 /*
 723  * collect histogram counts
 724  */
 725
 726 static int
 727 hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
 728                 struct symbol *sym, uint64_t ip, char level)
 729 {
 730         struct rb_node **p = &hist.rb_node;
 731         struct rb_node *parent = NULL;
 732         struct hist_entry *he;
 733         struct hist_entry entry = {
 734                 .thread = thread,
 735                 .map    = map,
 736                 .dso    = dso,
 737                 .sym    = sym,
 738                 .ip     = ip,
 739                 .level  = level,
 740                 .count  = 1,
 741         };
 742         int cmp;
 743
 744         while (*p != NULL) {
 745                 parent = *p;
 746                 he = rb_entry(parent, struct hist_entry, rb_node);
 747
 748                 cmp = hist_entry__cmp(&entry, he);
 749
 750                 if (!cmp) {
 751                         he->count++;
 752                         return 0;
 753                 }
 754
 755                 if (cmp < 0)
 756                         p = &(*p)->rb_left;
 757                 else
 758                         p = &(*p)->rb_right;
 759         }
 760
 761         he = malloc(sizeof(*he));
 762         if (!he)
 763                 return -ENOMEM;
 764         *he = entry;
 765         rb_link_node(&he->rb_node, parent, p);
 766         rb_insert_color(&he->rb_node, &hist);
 767
 768         return 0;
 769 }
 770
 771 static void hist_entry__free(struct hist_entry *he)
 772 {
 773         free(he);
 774 }
 775
 776 /*
 777  * collapse the histogram
 778  */
 779
 780 static struct rb_root collapse_hists;
 781
 782 static void collapse__insert_entry(struct hist_entry *he)
 783 {
 784         struct rb_node **p = &collapse_hists.rb_node;
 785         struct rb_node *parent = NULL;
 786         struct hist_entry *iter;
 787         int64_t cmp;
 788
 789         while (*p != NULL) {
 790                 parent = *p;
 791                 iter = rb_entry(parent, struct hist_entry, rb_node);
 792
 793                 cmp = hist_entry__collapse(iter, he);
 794
 795                 if (!cmp) {
 796                         iter->count += he->count;
 797                         hist_entry__free(he);
 798                         return;
 799                 }
 800
 801                 if (cmp < 0)
 802                         p = &(*p)->rb_left;
 803                 else
 804                         p = &(*p)->rb_right;
 805         }
 806
 807         rb_link_node(&he->rb_node, parent, p);
 808         rb_insert_color(&he->rb_node, &collapse_hists);
 809 }
 810
 811 static void collapse__resort(void)
 812 {
 813         struct rb_node *next;
 814         struct hist_entry *n;
 815
 816         if (!sort__need_collapse)
 817                 return;
 818
 819         next = rb_first(&hist);
 820         while (next) {
 821                 n = rb_entry(next, struct hist_entry, rb_node);
 822                 next = rb_next(&n->rb_node);
 823
 824                 rb_erase(&n->rb_node, &hist);
 825                 collapse__insert_entry(n);
 826         }
 827 }
 828
 829 /*
 830  * reverse the map, sort on count.
 831  */
 832
 833 static struct rb_root output_hists;
 834
 835 static void output__insert_entry(struct hist_entry *he)
 836 {
 837         struct rb_node **p = &output_hists.rb_node;
 838         struct rb_node *parent = NULL;
 839         struct hist_entry *iter;
 840
 841         while (*p != NULL) {
 842                 parent = *p;
 843                 iter = rb_entry(parent, struct hist_entry, rb_node);
 844
 845                 if (he->count > iter->count)
 846                         p = &(*p)->rb_left;
 847                 else
 848                         p = &(*p)->rb_right;
 849         }
 850
 851         rb_link_node(&he->rb_node, parent, p);
 852         rb_insert_color(&he->rb_node, &output_hists);
 853 }
 854
 855 static void output__resort(void)
 856 {
 857         struct rb_node *next;
 858         struct hist_entry *n;
 859         struct rb_root *tree = &hist;
 860
 861         if (sort__need_collapse)
 862                 tree = &collapse_hists;
 863
 864         next = rb_first(tree);
 865
 866         while (next) {
 867                 n = rb_entry(next, struct hist_entry, rb_node);
 868                 next = rb_next(&n->rb_node);
 869
 870                 rb_erase(&n->rb_node, tree);
 871                 output__insert_entry(n);
 872         }
 873 }
 874
 875 static size_t output__fprintf(FILE *fp, uint64_t total_samples)
 876 {
 877         struct hist_entry *pos;
 878         struct sort_entry *se;
 879         struct rb_node *nd;
 880         size_t ret = 0;
 881
 882         fprintf(fp, "\n");
 883         fprintf(fp, "#\n");
 884         fprintf(fp, "# (%Ld samples)\n", (__u64)total_samples);
 885         fprintf(fp, "#\n");
 886
 887         fprintf(fp, "# Overhead");
 888         list_for_each_entry(se, &hist_entry__sort_list, list)
 889                 fprintf(fp, "  %s", se->header);
 890         fprintf(fp, "\n");
 891
 892         fprintf(fp, "# ........");
 893         list_for_each_entry(se, &hist_entry__sort_list, list) {
 894                 int i;
 895
 896                 fprintf(fp, "  ");
 897                 for (i = 0; i < strlen(se->header); i++)
 898                         fprintf(fp, ".");
 899         }
 900         fprintf(fp, "\n");
 901
 902         fprintf(fp, "#\n");
 903
 904         for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
 905                 pos = rb_entry(nd, struct hist_entry, rb_node);
 906                 ret += hist_entry__fprintf(fp, pos, total_samples);
 907         }
 908
 909         if (!strcmp(sort_order, default_sort_order)) {
 910                 fprintf(fp, "#\n");
 911                 fprintf(fp, "# (For more details, try: perf report --sort comm,dso,symbol)\n");
 912                 fprintf(fp, "#\n");
 913         }
 914         fprintf(fp, "\n");
 915
 916         return ret;
 917 }
 918
 919 static void register_idle_thread(void)
 920 {
 921         struct thread *thread = threads__findnew(0);
 922
 923         if (thread == NULL ||
 924                         thread__set_comm(thread, "[idle]")) {
 925                 fprintf(stderr, "problem inserting idle task.\n");
 926                 exit(-1);
 927         }
 928 }
 929
 930 static unsigned long total = 0,
 931                      total_mmap = 0,
 932                      total_comm = 0,
 933                      total_fork = 0,
 934                      total_unknown = 0;
 935
 936 static int
 937 process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
 938 {
 939         char level;
 940         int show = 0;
 941         struct dso *dso = NULL;
 942         struct thread *thread = threads__findnew(event->ip.pid);
 943         uint64_t ip = event->ip.ip;
 944         struct map *map = NULL;
 945
 946         dprintf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
 947                 (void *)(offset + head),
 948                 (void *)(long)(event->header.size),
 949                 event->header.misc,
 950                 event->ip.pid,
 951                 (void *)(long)ip);
 952
 953         dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 954
 955         if (thread == NULL) {
 956                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 957                         event->header.type);
 958                 return -1;
 959         }
 960
 961         if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
 962                 show = SHOW_KERNEL;
 963                 level = 'k';
 964
 965                 dso = kernel_dso;
 966
 967                 dprintf(" ...... dso: %s\n", dso->name);
 968
 969         } else if (event->header.misc & PERF_EVENT_MISC_USER) {
 970
 971                 show = SHOW_USER;
 972                 level = '.';
 973
 974                 map = thread__find_map(thread, ip);
 975                 if (map != NULL) {
 976                         ip = map->map_ip(map, ip);
 977                         dso = map->dso;
 978                 } else {
 979                         /*
 980                          * If this is outside of all known maps,
 981                          * and is a negative address, try to look it
 982                          * up in the kernel dso, as it might be a
 983                          * vsyscall (which executes in user-mode):
 984                          */
 985                         if ((long long)ip < 0)
 986                                 dso = kernel_dso;
 987                 }
 988                 dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
 989
 990         } else {
 991                 show = SHOW_HV;
 992                 level = 'H';
 993                 dprintf(" ...... dso: [hypervisor]\n");
 994         }
 995
 996         if (show & show_mask) {
 997                 struct symbol *sym = NULL;
 998
 999                 if (dso)
1000                         sym = dso->find_symbol(dso, ip);
1001
1002                 if (hist_entry__add(thread, map, dso, sym, ip, level)) {
1003                         fprintf(stderr,
1004                 "problem incrementing symbol count, skipping event\n");
1005                         return -1;
1006                 }
1007         }
1008         total++;
1009
1010         return 0;
1011 }
1012
1013 static int
1014 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
1015 {
1016         struct thread *thread = threads__findnew(event->mmap.pid);
1017         struct map *map = map__new(&event->mmap);
1018
1019         dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
1020                 (void *)(offset + head),
1021                 (void *)(long)(event->header.size),
1022                 event->mmap.pid,
1023                 (void *)(long)event->mmap.start,
1024                 (void *)(long)event->mmap.len,
1025                 (void *)(long)event->mmap.pgoff,
1026                 event->mmap.filename);
1027
1028         if (thread == NULL || map == NULL) {
1029                 dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
1030                 return 0;
1031         }
1032
1033         thread__insert_map(thread, map);
1034         total_mmap++;
1035
1036         return 0;
1037 }
1038
1039 static int
1040 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
1041 {
1042         struct thread *thread = threads__findnew(event->comm.pid);
1043
1044         dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
1045                 (void *)(offset + head),
1046                 (void *)(long)(event->header.size),
1047                 event->comm.comm, event->comm.pid);
1048
1049         if (thread == NULL ||
1050             thread__set_comm(thread, event->comm.comm)) {
1051                 dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
1052                 return -1;
1053         }
1054         total_comm++;
1055
1056         return 0;
1057 }
1058
1059 static int
1060 process_fork_event(event_t *event, unsigned long offset, unsigned long head)
1061 {
1062         struct thread *thread = threads__findnew(event->fork.pid);
1063         struct thread *parent = threads__findnew(event->fork.ppid);
1064
1065         dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
1066                 (void *)(offset + head),
1067                 (void *)(long)(event->header.size),
1068                 event->fork.pid, event->fork.ppid);
1069
1070         if (!thread || !parent || thread__fork(thread, parent)) {
1071                 dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
1072                 return -1;
1073         }
1074         total_fork++;
1075
1076         return 0;
1077 }
1078
1079 static int
1080 process_period_event(event_t *event, unsigned long offset, unsigned long head)
1081 {
1082         dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n",
1083                 (void *)(offset + head),
1084                 (void *)(long)(event->header.size),
1085                 event->period.time,
1086                 event->period.id,
1087                 event->period.sample_period);
1088
1089         return 0;
1090 }
1091
1092 static int
1093 process_event(event_t *event, unsigned long offset, unsigned long head)
1094 {
1095         if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
1096                 return process_overflow_event(event, offset, head);
1097
1098         switch (event->header.type) {
1099         case PERF_EVENT_MMAP:
1100                 return process_mmap_event(event, offset, head);
1101
1102         case PERF_EVENT_COMM:
1103                 return process_comm_event(event, offset, head);
1104
1105         case PERF_EVENT_FORK:
1106                 return process_fork_event(event, offset, head);
1107
1108         case PERF_EVENT_PERIOD:
1109                 return process_period_event(event, offset, head);
1110         /*
1111          * We dont process them right now but they are fine:
1112          */
1113
1114         case PERF_EVENT_THROTTLE:
1115         case PERF_EVENT_UNTHROTTLE:
1116                 return 0;
1117
1118         default:
1119                 return -1;
1120         }
1121
1122         return 0;
1123 }
1124
1125 static int __cmd_report(void)
1126 {
1127         int ret, rc = EXIT_FAILURE;
1128         unsigned long offset = 0;
1129         unsigned long head = 0;
1130         struct stat stat;
1131         event_t *event;
1132         uint32_t size;
1133         char *buf;
1134
1135         register_idle_thread();
1136
1137         input = open(input_name, O_RDONLY);
1138         if (input < 0) {
1139                 fprintf(stderr, " failed to open file: %s", input_name);
1140                 if (!strcmp(input_name, "perf.data"))
1141                         fprintf(stderr, "  (try 'perf record' first)");
1142                 fprintf(stderr, "\n");
1143                 exit(-1);
1144         }
1145
1146         ret = fstat(input, &stat);
1147         if (ret < 0) {
1148                 perror("failed to stat file");
1149                 exit(-1);
1150         }
1151
1152         if (!stat.st_size) {
1153                 fprintf(stderr, "zero-sized file, nothing to do!\n");
1154                 exit(0);
1155         }
1156
1157         if (load_kernel() < 0) {
1158                 perror("failed to load kernel symbols");
1159                 return EXIT_FAILURE;
1160         }
1161
1162         if (!full_paths) {
1163                 if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
1164                         perror("failed to get the current directory");
1165                         return EXIT_FAILURE;
1166                 }
1167                 cwdlen = strlen(cwd);
1168         } else {
1169                 cwd = NULL;
1170                 cwdlen = 0;
1171         }
1172 remap:
1173         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
1174                            MAP_SHARED, input, offset);
1175         if (buf == MAP_FAILED) {
1176                 perror("failed to mmap file");
1177                 exit(-1);
1178         }
1179
1180 more:
1181         event = (event_t *)(buf + head);
1182
1183         size = event->header.size;
1184         if (!size)
1185                 size = 8;
1186
1187         if (head + event->header.size >= page_size * mmap_window) {
1188                 unsigned long shift = page_size * (head / page_size);
1189                 int ret;
1190
1191                 ret = munmap(buf, page_size * mmap_window);
1192                 assert(ret == 0);
1193
1194                 offset += shift;
1195                 head -= shift;
1196                 goto remap;
1197         }
1198
1199         size = event->header.size;
1200
1201         dprintf("%p [%p]: event: %d\n",
1202                         (void *)(offset + head),
1203                         (void *)(long)event->header.size,
1204                         event->header.type);
1205
1206         if (!size || process_event(event, offset, head) < 0) {
1207
1208                 dprintf("%p [%p]: skipping unknown header type: %d\n",
1209                         (void *)(offset + head),
1210                         (void *)(long)(event->header.size),
1211                         event->header.type);
1212
1213                 total_unknown++;
1214
1215                 /*
1216                  * assume we lost track of the stream, check alignment, and
1217                  * increment a single u64 in the hope to catch on again 'soon'.
1218                  */
1219
1220                 if (unlikely(head & 7))
1221                         head &= ~7ULL;
1222
1223                 size = 8;
1224         }
1225
1226         head += size;
1227
1228         if (offset + head < stat.st_size)
1229                 goto more;
1230
1231         rc = EXIT_SUCCESS;
1232         close(input);
1233
1234         dprintf("      IP events: %10ld\n", total);
1235         dprintf("    mmap events: %10ld\n", total_mmap);
1236         dprintf("    comm events: %10ld\n", total_comm);
1237         dprintf("    fork events: %10ld\n", total_fork);
1238         dprintf(" unknown events: %10ld\n", total_unknown);
1239
1240         if (dump_trace)
1241                 return 0;
1242
1243         if (verbose >= 3)
1244                 threads__fprintf(stdout);
1245
1246         if (verbose >= 2)
1247                 dsos__fprintf(stdout);
1248
1249         collapse__resort();
1250         output__resort();
1251         output__fprintf(stdout, total);
1252
1253         return rc;
1254 }
1255
1256 static const char * const report_usage[] = {
1257         "perf report [<options>] <command>",
1258         NULL
1259 };
1260
1261 static const struct option options[] = {
1262         OPT_STRING('i', "input", &input_name, "file",
1263                     "input file name"),
1264         OPT_BOOLEAN('v', "verbose", &verbose,
1265                     "be more verbose (show symbol address, etc)"),
1266         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1267                     "dump raw trace in ASCII"),
1268         OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
1269         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1270                    "sort by key(s): pid, comm, dso, symbol. Default: pid,symbol"),
1271         OPT_BOOLEAN('P', "full-paths", &full_paths,
1272                     "Don't shorten the pathnames taking into account the cwd"),
1273         OPT_END()
1274 };
1275
1276 static void setup_sorting(void)
1277 {
1278         char *tmp, *tok, *str = strdup(sort_order);
1279
1280         for (tok = strtok_r(str, ", ", &tmp);
1281                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
1282                 if (sort_dimension__add(tok) < 0) {
1283                         error("Unknown --sort key: `%s'", tok);
1284                         usage_with_options(report_usage, options);
1285                 }
1286         }
1287
1288         free(str);
1289 }
1290
1291 int cmd_report(int argc, const char **argv, const char *prefix)
1292 {
1293         symbol__init();
1294
1295         page_size = getpagesize();
1296
1297         argc = parse_options(argc, argv, options, report_usage, 0);
1298
1299         setup_sorting();
1300
1301         /*
1302          * Any (unrecognized) arguments left?
1303          */
1304         if (argc)
1305                 usage_with_options(report_usage, options);
1306
1307         setup_pager();
1308
1309         return __cmd_report();
1310 }