kernel/tools/perf/ui/stdio/hist.c

   1 #include <stdio.h>
   2
   3 #include "../../util/util.h"
   4 #include "../../util/hist.h"
   5 #include "../../util/sort.h"
   6 #include "../../util/evsel.h"
   7
   8
   9 static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
  10 {
  11         int i;
  12         int ret = fprintf(fp, "            ");
  13
  14         for (i = 0; i < left_margin; i++)
  15                 ret += fprintf(fp, " ");
  16
  17         return ret;
  18 }
  19
  20 static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
  21                                           int left_margin)
  22 {
  23         int i;
  24         size_t ret = callchain__fprintf_left_margin(fp, left_margin);
  25
  26         for (i = 0; i < depth; i++)
  27                 if (depth_mask & (1 << i))
  28                         ret += fprintf(fp, "|          ");
  29                 else
  30                         ret += fprintf(fp, "           ");
  31
  32         ret += fprintf(fp, "\n");
  33
  34         return ret;
  35 }
  36
  37 static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain,
  38                                      int depth, int depth_mask, int period,
  39                                      u64 total_samples, u64 hits,
  40                                      int left_margin)
  41 {
  42         int i;
  43         size_t ret = 0;
  44         char bf[1024];
  45
  46         ret += callchain__fprintf_left_margin(fp, left_margin);
  47         for (i = 0; i < depth; i++) {
  48                 if (depth_mask & (1 << i))
  49                         ret += fprintf(fp, "|");
  50                 else
  51                         ret += fprintf(fp, " ");
  52                 if (!period && i == depth - 1) {
  53                         double percent;
  54
  55                         percent = hits * 100.0 / total_samples;
  56                         ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
  57                 } else
  58                         ret += fprintf(fp, "%s", "          ");
  59         }
  60         fputs(callchain_list__sym_name(chain, bf, sizeof(bf), false), fp);
  61         fputc('\n', fp);
  62         return ret;
  63 }
  64
  65 static struct symbol *rem_sq_bracket;
  66 static struct callchain_list rem_hits;
  67
  68 static void init_rem_hits(void)
  69 {
  70         rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
  71         if (!rem_sq_bracket) {
  72                 fprintf(stderr, "Not enough memory to display remaining hits\n");
  73                 return;
  74         }
  75
  76         strcpy(rem_sq_bracket->name, "[...]");
  77         rem_hits.ms.sym = rem_sq_bracket;
  78 }
  79
  80 static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
  81                                          u64 total_samples, int depth,
  82                                          int depth_mask, int left_margin)
  83 {
  84         struct rb_node *node, *next;
  85         struct callchain_node *child;
  86         struct callchain_list *chain;
  87         int new_depth_mask = depth_mask;
  88         u64 remaining;
  89         size_t ret = 0;
  90         int i;
  91         uint entries_printed = 0;
  92
  93         remaining = total_samples;
  94
  95         node = rb_first(root);
  96         while (node) {
  97                 u64 new_total;
  98                 u64 cumul;
  99
 100                 child = rb_entry(node, struct callchain_node, rb_node);
 101                 cumul = callchain_cumul_hits(child);
 102                 remaining -= cumul;
 103
 104                 /*
 105                  * The depth mask manages the output of pipes that show
 106                  * the depth. We don't want to keep the pipes of the current
 107                  * level for the last child of this depth.
 108                  * Except if we have remaining filtered hits. They will
 109                  * supersede the last child
 110                  */
 111                 next = rb_next(node);
 112                 if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
 113                         new_depth_mask &= ~(1 << (depth - 1));
 114
 115                 /*
 116                  * But we keep the older depth mask for the line separator
 117                  * to keep the level link until we reach the last child
 118                  */
 119                 ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
 120                                                    left_margin);
 121                 i = 0;
 122                 list_for_each_entry(chain, &child->val, list) {
 123                         ret += ipchain__fprintf_graph(fp, chain, depth,
 124                                                       new_depth_mask, i++,
 125                                                       total_samples,
 126                                                       cumul,
 127                                                       left_margin);
 128                 }
 129
 130                 if (callchain_param.mode == CHAIN_GRAPH_REL)
 131                         new_total = child->children_hit;
 132                 else
 133                         new_total = total_samples;
 134
 135                 ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
 136                                                   depth + 1,
 137                                                   new_depth_mask | (1 << depth),
 138                                                   left_margin);
 139                 node = next;
 140                 if (++entries_printed == callchain_param.print_limit)
 141                         break;
 142         }
 143
 144         if (callchain_param.mode == CHAIN_GRAPH_REL &&
 145                 remaining && remaining != total_samples) {
 146
 147                 if (!rem_sq_bracket)
 148                         return ret;
 149
 150                 new_depth_mask &= ~(1 << (depth - 1));
 151                 ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
 152                                               new_depth_mask, 0, total_samples,
 153                                               remaining, left_margin);
 154         }
 155
 156         return ret;
 157 }
 158
 159 static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 160                                        u64 total_samples, int left_margin)
 161 {
 162         struct callchain_node *cnode;
 163         struct callchain_list *chain;
 164         u32 entries_printed = 0;
 165         bool printed = false;
 166         struct rb_node *node;
 167         int i = 0;
 168         int ret = 0;
 169         char bf[1024];
 170
 171         /*
 172          * If have one single callchain root, don't bother printing
 173          * its percentage (100 % in fractal mode and the same percentage
 174          * than the hist in graph mode). This also avoid one level of column.
 175          */
 176         node = rb_first(root);
 177         if (node && !rb_next(node)) {
 178                 cnode = rb_entry(node, struct callchain_node, rb_node);
 179                 list_for_each_entry(chain, &cnode->val, list) {
 180                         /*
 181                          * If we sort by symbol, the first entry is the same than
 182                          * the symbol. No need to print it otherwise it appears as
 183                          * displayed twice.
 184                          */
 185                         if (!i++ && field_order == NULL &&
 186                             sort_order && !prefixcmp(sort_order, "sym"))
 187                                 continue;
 188                         if (!printed) {
 189                                 ret += callchain__fprintf_left_margin(fp, left_margin);
 190                                 ret += fprintf(fp, "|\n");
 191                                 ret += callchain__fprintf_left_margin(fp, left_margin);
 192                                 ret += fprintf(fp, "---");
 193                                 left_margin += 3;
 194                                 printed = true;
 195                         } else
 196                                 ret += callchain__fprintf_left_margin(fp, left_margin);
 197
 198                         ret += fprintf(fp, "%s\n", callchain_list__sym_name(chain, bf, sizeof(bf),
 199                                                         false));
 200
 201                         if (++entries_printed == callchain_param.print_limit)
 202                                 break;
 203                 }
 204                 root = &cnode->rb_root;
 205         }
 206
 207         ret += __callchain__fprintf_graph(fp, root, total_samples,
 208                                           1, 1, left_margin);
 209         ret += fprintf(fp, "\n");
 210
 211         return ret;
 212 }
 213
 214 static size_t __callchain__fprintf_flat(FILE *fp, struct callchain_node *node,
 215                                         u64 total_samples)
 216 {
 217         struct callchain_list *chain;
 218         size_t ret = 0;
 219         char bf[1024];
 220
 221         if (!node)
 222                 return 0;
 223
 224         ret += __callchain__fprintf_flat(fp, node->parent, total_samples);
 225
 226
 227         list_for_each_entry(chain, &node->val, list) {
 228                 if (chain->ip >= PERF_CONTEXT_MAX)
 229                         continue;
 230                 ret += fprintf(fp, "                %s\n", callchain_list__sym_name(chain,
 231                                         bf, sizeof(bf), false));
 232         }
 233
 234         return ret;
 235 }
 236
 237 static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *tree,
 238                                       u64 total_samples)
 239 {
 240         size_t ret = 0;
 241         u32 entries_printed = 0;
 242         struct callchain_node *chain;
 243         struct rb_node *rb_node = rb_first(tree);
 244
 245         while (rb_node) {
 246                 double percent;
 247
 248                 chain = rb_entry(rb_node, struct callchain_node, rb_node);
 249                 percent = chain->hit * 100.0 / total_samples;
 250
 251                 ret = percent_color_fprintf(fp, "           %6.2f%%\n", percent);
 252                 ret += __callchain__fprintf_flat(fp, chain, total_samples);
 253                 ret += fprintf(fp, "\n");
 254                 if (++entries_printed == callchain_param.print_limit)
 255                         break;
 256
 257                 rb_node = rb_next(rb_node);
 258         }
 259
 260         return ret;
 261 }
 262
 263 static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
 264                                             u64 total_samples, int left_margin,
 265                                             FILE *fp)
 266 {
 267         switch (callchain_param.mode) {
 268         case CHAIN_GRAPH_REL:
 269                 return callchain__fprintf_graph(fp, &he->sorted_chain,
 270                                                 symbol_conf.cumulate_callchain ?
 271                                                 he->stat_acc->period : he->stat.period,
 272                                                 left_margin);
 273                 break;
 274         case CHAIN_GRAPH_ABS:
 275                 return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
 276                                                 left_margin);
 277                 break;
 278         case CHAIN_FLAT:
 279                 return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
 280                 break;
 281         case CHAIN_NONE:
 282                 break;
 283         default:
 284                 pr_err("Bad callchain mode\n");
 285         }
 286
 287         return 0;
 288 }
 289
 290 static size_t hist_entry__callchain_fprintf(struct hist_entry *he,
 291                                             struct hists *hists,
 292                                             FILE *fp)
 293 {
 294         int left_margin = 0;
 295         u64 total_period = hists->stats.total_period;
 296
 297         if (field_order == NULL && (sort_order == NULL ||
 298                                     !prefixcmp(sort_order, "comm"))) {
 299                 struct perf_hpp_fmt *fmt;
 300
 301                 perf_hpp__for_each_format(fmt) {
 302                         if (!perf_hpp__is_sort_entry(fmt))
 303                                 continue;
 304
 305                         /* must be 'comm' sort entry */
 306                         left_margin = fmt->width(fmt, NULL, hists_to_evsel(hists));
 307                         left_margin -= thread__comm_len(he->thread);
 308                         break;
 309                 }
 310         }
 311         return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
 312 }
 313
 314 static int hist_entry__snprintf(struct hist_entry *he, struct perf_hpp *hpp)
 315 {
 316         const char *sep = symbol_conf.field_sep;
 317         struct perf_hpp_fmt *fmt;
 318         char *start = hpp->buf;
 319         int ret;
 320         bool first = true;
 321
 322         if (symbol_conf.exclude_other && !he->parent)
 323                 return 0;
 324
 325         perf_hpp__for_each_format(fmt) {
 326                 if (perf_hpp__should_skip(fmt))
 327                         continue;
 328
 329                 /*
 330                  * If there's no field_sep, we still need
 331                  * to display initial '  '.
 332                  */
 333                 if (!sep || !first) {
 334                         ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
 335                         advance_hpp(hpp, ret);
 336                 } else
 337                         first = false;
 338
 339                 if (perf_hpp__use_color() && fmt->color)
 340                         ret = fmt->color(fmt, hpp, he);
 341                 else
 342                         ret = fmt->entry(fmt, hpp, he);
 343
 344                 advance_hpp(hpp, ret);
 345         }
 346
 347         return hpp->buf - start;
 348 }
 349
 350 static int hist_entry__fprintf(struct hist_entry *he, size_t size,
 351                                struct hists *hists,
 352                                char *bf, size_t bfsz, FILE *fp)
 353 {
 354         int ret;
 355         struct perf_hpp hpp = {
 356                 .buf            = bf,
 357                 .size           = size,
 358         };
 359
 360         if (size == 0 || size > bfsz)
 361                 size = hpp.size = bfsz;
 362
 363         hist_entry__snprintf(he, &hpp);
 364
 365         ret = fprintf(fp, "%s\n", bf);
 366
 367         if (symbol_conf.use_callchain)
 368                 ret += hist_entry__callchain_fprintf(he, hists, fp);
 369
 370         return ret;
 371 }
 372
 373 size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 374                       int max_cols, float min_pcnt, FILE *fp)
 375 {
 376         struct perf_hpp_fmt *fmt;
 377         struct rb_node *nd;
 378         size_t ret = 0;
 379         unsigned int width;
 380         const char *sep = symbol_conf.field_sep;
 381         int nr_rows = 0;
 382         char bf[96];
 383         struct perf_hpp dummy_hpp = {
 384                 .buf    = bf,
 385                 .size   = sizeof(bf),
 386         };
 387         bool first = true;
 388         size_t linesz;
 389         char *line = NULL;
 390
 391         init_rem_hits();
 392
 393         perf_hpp__for_each_format(fmt)
 394                 perf_hpp__reset_width(fmt, hists);
 395
 396         if (symbol_conf.col_width_list_str)
 397                 perf_hpp__set_user_width(symbol_conf.col_width_list_str);
 398
 399         if (!show_header)
 400                 goto print_entries;
 401
 402         fprintf(fp, "# ");
 403
 404         perf_hpp__for_each_format(fmt) {
 405                 if (perf_hpp__should_skip(fmt))
 406                         continue;
 407
 408                 if (!first)
 409                         fprintf(fp, "%s", sep ?: "  ");
 410                 else
 411                         first = false;
 412
 413                 fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
 414                 fprintf(fp, "%s", bf);
 415         }
 416
 417         fprintf(fp, "\n");
 418         if (max_rows && ++nr_rows >= max_rows)
 419                 goto out;
 420
 421         if (sep)
 422                 goto print_entries;
 423
 424         first = true;
 425
 426         fprintf(fp, "# ");
 427
 428         perf_hpp__for_each_format(fmt) {
 429                 unsigned int i;
 430
 431                 if (perf_hpp__should_skip(fmt))
 432                         continue;
 433
 434                 if (!first)
 435                         fprintf(fp, "%s", sep ?: "  ");
 436                 else
 437                         first = false;
 438
 439                 width = fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
 440                 for (i = 0; i < width; i++)
 441                         fprintf(fp, ".");
 442         }
 443
 444         fprintf(fp, "\n");
 445         if (max_rows && ++nr_rows >= max_rows)
 446                 goto out;
 447
 448         fprintf(fp, "#\n");
 449         if (max_rows && ++nr_rows >= max_rows)
 450                 goto out;
 451
 452 print_entries:
 453         linesz = hists__sort_list_width(hists) + 3 + 1;
 454         linesz += perf_hpp__color_overhead();
 455         line = malloc(linesz);
 456         if (line == NULL) {
 457                 ret = -1;
 458                 goto out;
 459         }
 460
 461         for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 462                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 463                 float percent;
 464
 465                 if (h->filtered)
 466                         continue;
 467
 468                 percent = hist_entry__get_percent_limit(h);
 469                 if (percent < min_pcnt)
 470                         continue;
 471
 472                 ret += hist_entry__fprintf(h, max_cols, hists, line, linesz, fp);
 473
 474                 if (max_rows && ++nr_rows >= max_rows)
 475                         break;
 476
 477                 if (h->ms.map == NULL && verbose > 1) {
 478                         __map_groups__fprintf_maps(h->thread->mg,
 479                                                    MAP__FUNCTION, fp);
 480                         fprintf(fp, "%.10s end\n", graph_dotted_line);
 481                 }
 482         }
 483
 484         free(line);
 485 out:
 486         zfree(&rem_sq_bracket);
 487
 488         return ret;
 489 }
 490
 491 size_t events_stats__fprintf(struct events_stats *stats, FILE *fp)
 492 {
 493         int i;
 494         size_t ret = 0;
 495
 496         for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
 497                 const char *name;
 498
 499                 if (stats->nr_events[i] == 0)
 500                         continue;
 501
 502                 name = perf_event__name(i);
 503                 if (!strcmp(name, "UNKNOWN"))
 504                         continue;
 505
 506                 ret += fprintf(fp, "%16s events: %10d\n", name,
 507                                stats->nr_events[i]);
 508         }
 509
 510         return ret;
 511 }