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
   7
   8 static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
   9 {
  10         int i;
  11         int ret = fprintf(fp, "            ");
  12
  13         for (i = 0; i < left_margin; i++)
  14                 ret += fprintf(fp, " ");
  15
  16         return ret;
  17 }
  18
  19 static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
  20                                           int left_margin)
  21 {
  22         int i;
  23         size_t ret = callchain__fprintf_left_margin(fp, left_margin);
  24
  25         for (i = 0; i < depth; i++)
  26                 if (depth_mask & (1 << i))
  27                         ret += fprintf(fp, "|          ");
  28                 else
  29                         ret += fprintf(fp, "           ");
  30
  31         ret += fprintf(fp, "\n");
  32
  33         return ret;
  34 }
  35
  36 static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain,
  37                                      int depth, int depth_mask, int period,
  38                                      u64 total_samples, u64 hits,
  39                                      int left_margin)
  40 {
  41         int i;
  42         size_t ret = 0;
  43
  44         ret += callchain__fprintf_left_margin(fp, left_margin);
  45         for (i = 0; i < depth; i++) {
  46                 if (depth_mask & (1 << i))
  47                         ret += fprintf(fp, "|");
  48                 else
  49                         ret += fprintf(fp, " ");
  50                 if (!period && i == depth - 1) {
  51                         double percent;
  52
  53                         percent = hits * 100.0 / total_samples;
  54                         ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
  55                 } else
  56                         ret += fprintf(fp, "%s", "          ");
  57         }
  58         if (chain->ms.sym)
  59                 ret += fprintf(fp, "%s\n", chain->ms.sym->name);
  60         else
  61                 ret += fprintf(fp, "0x%0" PRIx64 "\n", chain->ip);
  62
  63         return ret;
  64 }
  65
  66 static struct symbol *rem_sq_bracket;
  67 static struct callchain_list rem_hits;
  68
  69 static void init_rem_hits(void)
  70 {
  71         rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
  72         if (!rem_sq_bracket) {
  73                 fprintf(stderr, "Not enough memory to display remaining hits\n");
  74                 return;
  75         }
  76
  77         strcpy(rem_sq_bracket->name, "[...]");
  78         rem_hits.ms.sym = rem_sq_bracket;
  79 }
  80
  81 static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
  82                                          u64 total_samples, int depth,
  83                                          int depth_mask, int left_margin)
  84 {
  85         struct rb_node *node, *next;
  86         struct callchain_node *child;
  87         struct callchain_list *chain;
  88         int new_depth_mask = depth_mask;
  89         u64 remaining;
  90         size_t ret = 0;
  91         int i;
  92         uint entries_printed = 0;
  93
  94         remaining = total_samples;
  95
  96         node = rb_first(root);
  97         while (node) {
  98                 u64 new_total;
  99                 u64 cumul;
 100
 101                 child = rb_entry(node, struct callchain_node, rb_node);
 102                 cumul = callchain_cumul_hits(child);
 103                 remaining -= cumul;
 104
 105                 /*
 106                  * The depth mask manages the output of pipes that show
 107                  * the depth. We don't want to keep the pipes of the current
 108                  * level for the last child of this depth.
 109                  * Except if we have remaining filtered hits. They will
 110                  * supersede the last child
 111                  */
 112                 next = rb_next(node);
 113                 if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
 114                         new_depth_mask &= ~(1 << (depth - 1));
 115
 116                 /*
 117                  * But we keep the older depth mask for the line separator
 118                  * to keep the level link until we reach the last child
 119                  */
 120                 ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
 121                                                    left_margin);
 122                 i = 0;
 123                 list_for_each_entry(chain, &child->val, list) {
 124                         ret += ipchain__fprintf_graph(fp, chain, depth,
 125                                                       new_depth_mask, i++,
 126                                                       total_samples,
 127                                                       cumul,
 128                                                       left_margin);
 129                 }
 130
 131                 if (callchain_param.mode == CHAIN_GRAPH_REL)
 132                         new_total = child->children_hit;
 133                 else
 134                         new_total = total_samples;
 135
 136                 ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
 137                                                   depth + 1,
 138                                                   new_depth_mask | (1 << depth),
 139                                                   left_margin);
 140                 node = next;
 141                 if (++entries_printed == callchain_param.print_limit)
 142                         break;
 143         }
 144
 145         if (callchain_param.mode == CHAIN_GRAPH_REL &&
 146                 remaining && remaining != total_samples) {
 147
 148                 if (!rem_sq_bracket)
 149                         return ret;
 150
 151                 new_depth_mask &= ~(1 << (depth - 1));
 152                 ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
 153                                               new_depth_mask, 0, total_samples,
 154                                               remaining, left_margin);
 155         }
 156
 157         return ret;
 158 }
 159
 160 static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 161                                        u64 total_samples, int left_margin)
 162 {
 163         struct callchain_node *cnode;
 164         struct callchain_list *chain;
 165         u32 entries_printed = 0;
 166         bool printed = false;
 167         struct rb_node *node;
 168         int i = 0;
 169         int ret = 0;
 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++ && sort__first_dimension == SORT_SYM)
 186                                 continue;
 187                         if (!printed) {
 188                                 ret += callchain__fprintf_left_margin(fp, left_margin);
 189                                 ret += fprintf(fp, "|\n");
 190                                 ret += callchain__fprintf_left_margin(fp, left_margin);
 191                                 ret += fprintf(fp, "---");
 192                                 left_margin += 3;
 193                                 printed = true;
 194                         } else
 195                                 ret += callchain__fprintf_left_margin(fp, left_margin);
 196
 197                         if (chain->ms.sym)
 198                                 ret += fprintf(fp, " %s\n", chain->ms.sym->name);
 199                         else
 200                                 ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);
 201
 202                         if (++entries_printed == callchain_param.print_limit)
 203                                 break;
 204                 }
 205                 root = &cnode->rb_root;
 206         }
 207
 208         ret += __callchain__fprintf_graph(fp, root, total_samples,
 209                                           1, 1, left_margin);
 210         ret += fprintf(fp, "\n");
 211
 212         return ret;
 213 }
 214
 215 static size_t __callchain__fprintf_flat(FILE *fp,
 216                                         struct callchain_node *self,
 217                                         u64 total_samples)
 218 {
 219         struct callchain_list *chain;
 220         size_t ret = 0;
 221
 222         if (!self)
 223                 return 0;
 224
 225         ret += __callchain__fprintf_flat(fp, self->parent, total_samples);
 226
 227
 228         list_for_each_entry(chain, &self->val, list) {
 229                 if (chain->ip >= PERF_CONTEXT_MAX)
 230                         continue;
 231                 if (chain->ms.sym)
 232                         ret += fprintf(fp, "                %s\n", chain->ms.sym->name);
 233                 else
 234                         ret += fprintf(fp, "                %p\n",
 235                                         (void *)(long)chain->ip);
 236         }
 237
 238         return ret;
 239 }
 240
 241 static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *self,
 242                                       u64 total_samples)
 243 {
 244         size_t ret = 0;
 245         u32 entries_printed = 0;
 246         struct rb_node *rb_node;
 247         struct callchain_node *chain;
 248
 249         rb_node = rb_first(self);
 250         while (rb_node) {
 251                 double percent;
 252
 253                 chain = rb_entry(rb_node, struct callchain_node, rb_node);
 254                 percent = chain->hit * 100.0 / total_samples;
 255
 256                 ret = percent_color_fprintf(fp, "           %6.2f%%\n", percent);
 257                 ret += __callchain__fprintf_flat(fp, chain, total_samples);
 258                 ret += fprintf(fp, "\n");
 259                 if (++entries_printed == callchain_param.print_limit)
 260                         break;
 261
 262                 rb_node = rb_next(rb_node);
 263         }
 264
 265         return ret;
 266 }
 267
 268 static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
 269                                             u64 total_samples, int left_margin,
 270                                             FILE *fp)
 271 {
 272         switch (callchain_param.mode) {
 273         case CHAIN_GRAPH_REL:
 274                 return callchain__fprintf_graph(fp, &he->sorted_chain, he->stat.period,
 275                                                 left_margin);
 276                 break;
 277         case CHAIN_GRAPH_ABS:
 278                 return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
 279                                                 left_margin);
 280                 break;
 281         case CHAIN_FLAT:
 282                 return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
 283                 break;
 284         case CHAIN_NONE:
 285                 break;
 286         default:
 287                 pr_err("Bad callchain mode\n");
 288         }
 289
 290         return 0;
 291 }
 292
 293 static size_t hist_entry__callchain_fprintf(struct hist_entry *he,
 294                                             struct hists *hists,
 295                                             FILE *fp)
 296 {
 297         int left_margin = 0;
 298         u64 total_period = hists->stats.total_period;
 299
 300         if (sort__first_dimension == SORT_COMM) {
 301                 struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
 302                                                          typeof(*se), list);
 303                 left_margin = hists__col_len(hists, se->se_width_idx);
 304                 left_margin -= thread__comm_len(he->thread);
 305         }
 306
 307         return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
 308 }
 309
 310 static int hist_entry__fprintf(struct hist_entry *he, size_t size,
 311                                struct hists *hists, FILE *fp)
 312 {
 313         char bf[512];
 314         int ret;
 315         struct perf_hpp hpp = {
 316                 .buf            = bf,
 317                 .size           = size,
 318         };
 319         bool color = !symbol_conf.field_sep;
 320
 321         if (size == 0 || size > sizeof(bf))
 322                 size = hpp.size = sizeof(bf);
 323
 324         ret = hist_entry__period_snprintf(&hpp, he, color);
 325         hist_entry__sort_snprintf(he, bf + ret, size - ret, hists);
 326
 327         ret = fprintf(fp, "%s\n", bf);
 328
 329         if (symbol_conf.use_callchain)
 330                 ret += hist_entry__callchain_fprintf(he, hists, fp);
 331
 332         return ret;
 333 }
 334
 335 size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 336                       int max_cols, FILE *fp)
 337 {
 338         struct sort_entry *se;
 339         struct rb_node *nd;
 340         size_t ret = 0;
 341         unsigned int width;
 342         const char *sep = symbol_conf.field_sep;
 343         const char *col_width = symbol_conf.col_width_list_str;
 344         int idx, nr_rows = 0;
 345         char bf[96];
 346         struct perf_hpp dummy_hpp = {
 347                 .buf    = bf,
 348                 .size   = sizeof(bf),
 349         };
 350         bool first = true;
 351
 352         init_rem_hits();
 353
 354         if (!show_header)
 355                 goto print_entries;
 356
 357         fprintf(fp, "# ");
 358         for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
 359                 if (!perf_hpp__format[idx].cond)
 360                         continue;
 361
 362                 if (!first)
 363                         fprintf(fp, "%s", sep ?: "  ");
 364                 else
 365                         first = false;
 366
 367                 perf_hpp__format[idx].header(&dummy_hpp);
 368                 fprintf(fp, "%s", bf);
 369         }
 370
 371         list_for_each_entry(se, &hist_entry__sort_list, list) {
 372                 if (se->elide)
 373                         continue;
 374                 if (sep) {
 375                         fprintf(fp, "%c%s", *sep, se->se_header);
 376                         continue;
 377                 }
 378                 width = strlen(se->se_header);
 379                 if (symbol_conf.col_width_list_str) {
 380                         if (col_width) {
 381                                 hists__set_col_len(hists, se->se_width_idx,
 382                                                    atoi(col_width));
 383                                 col_width = strchr(col_width, ',');
 384                                 if (col_width)
 385                                         ++col_width;
 386                         }
 387                 }
 388                 if (!hists__new_col_len(hists, se->se_width_idx, width))
 389                         width = hists__col_len(hists, se->se_width_idx);
 390                 fprintf(fp, "  %*s", width, se->se_header);
 391         }
 392
 393         fprintf(fp, "\n");
 394         if (max_rows && ++nr_rows >= max_rows)
 395                 goto out;
 396
 397         if (sep)
 398                 goto print_entries;
 399
 400         first = true;
 401
 402         fprintf(fp, "# ");
 403         for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
 404                 unsigned int i;
 405
 406                 if (!perf_hpp__format[idx].cond)
 407                         continue;
 408
 409                 if (!first)
 410                         fprintf(fp, "%s", sep ?: "  ");
 411                 else
 412                         first = false;
 413
 414                 width = perf_hpp__format[idx].width(&dummy_hpp);
 415                 for (i = 0; i < width; i++)
 416                         fprintf(fp, ".");
 417         }
 418
 419         list_for_each_entry(se, &hist_entry__sort_list, list) {
 420                 unsigned int i;
 421
 422                 if (se->elide)
 423                         continue;
 424
 425                 fprintf(fp, "  ");
 426                 width = hists__col_len(hists, se->se_width_idx);
 427                 if (width == 0)
 428                         width = strlen(se->se_header);
 429                 for (i = 0; i < width; i++)
 430                         fprintf(fp, ".");
 431         }
 432
 433         fprintf(fp, "\n");
 434         if (max_rows && ++nr_rows >= max_rows)
 435                 goto out;
 436
 437         fprintf(fp, "#\n");
 438         if (max_rows && ++nr_rows >= max_rows)
 439                 goto out;
 440
 441 print_entries:
 442         for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 443                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 444
 445                 if (h->filtered)
 446                         continue;
 447
 448                 ret += hist_entry__fprintf(h, max_cols, hists, fp);
 449
 450                 if (max_rows && ++nr_rows >= max_rows)
 451                         goto out;
 452
 453                 if (h->ms.map == NULL && verbose > 1) {
 454                         __map_groups__fprintf_maps(&h->thread->mg,
 455                                                    MAP__FUNCTION, verbose, fp);
 456                         fprintf(fp, "%.10s end\n", graph_dotted_line);
 457                 }
 458         }
 459 out:
 460         free(rem_sq_bracket);
 461
 462         return ret;
 463 }
 464
 465 size_t hists__fprintf_nr_events(struct hists *hists, FILE *fp)
 466 {
 467         int i;
 468         size_t ret = 0;
 469
 470         for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
 471                 const char *name;
 472
 473                 if (hists->stats.nr_events[i] == 0)
 474                         continue;
 475
 476                 name = perf_event__name(i);
 477                 if (!strcmp(name, "UNKNOWN"))
 478                         continue;
 479
 480                 ret += fprintf(fp, "%16s events: %10d\n", name,
 481                                hists->stats.nr_events[i]);
 482         }
 483
 484         return ret;
 485 }