1 // SPDX-License-Identifier: GPL-2.0 2 #include <math.h> 3 #include <stdio.h> 4 #include "evsel.h" 5 #include "stat.h" 6 #include "color.h" 7 #include "debug.h" 8 #include "pmu.h" 9 #include "rblist.h" 10 #include "evlist.h" 11 #include "expr.h" 12 #include "metricgroup.h" 13 #include "cgroup.h" 14 #include "units.h" 15 #include <linux/zalloc.h> 16 #include "iostat.h" 17 18 /* 19 * AGGR_GLOBAL: Use CPU 0 20 * AGGR_SOCKET: Use first CPU of socket 21 * AGGR_DIE: Use first CPU of die 22 * AGGR_CORE: Use first CPU of core 23 * AGGR_NONE: Use matching CPU 24 * AGGR_THREAD: Not supported? 25 */ 26 27 struct runtime_stat rt_stat; 28 struct stats walltime_nsecs_stats; 29 struct rusage_stats ru_stats; 30 31 struct saved_value { 32 struct rb_node rb_node; 33 struct evsel *evsel; 34 enum stat_type type; 35 int ctx; 36 int cpu_map_idx; 37 struct cgroup *cgrp; 38 struct runtime_stat *stat; 39 struct stats stats; 40 u64 metric_total; 41 int metric_other; 42 }; 43 44 static int saved_value_cmp(struct rb_node *rb_node, const void *entry) 45 { 46 struct saved_value *a = container_of(rb_node, 47 struct saved_value, 48 rb_node); 49 const struct saved_value *b = entry; 50 51 if (a->cpu_map_idx != b->cpu_map_idx) 52 return a->cpu_map_idx - b->cpu_map_idx; 53 54 /* 55 * Previously the rbtree was used to link generic metrics. 56 * The keys were evsel/cpu. Now the rbtree is extended to support 57 * per-thread shadow stats. For shadow stats case, the keys 58 * are cpu/type/ctx/stat (evsel is NULL). For generic metrics 59 * case, the keys are still evsel/cpu (type/ctx/stat are 0 or NULL). 60 */ 61 if (a->type != b->type) 62 return a->type - b->type; 63 64 if (a->ctx != b->ctx) 65 return a->ctx - b->ctx; 66 67 if (a->cgrp != b->cgrp) 68 return (char *)a->cgrp < (char *)b->cgrp ? -1 : +1; 69 70 if (a->evsel == NULL && b->evsel == NULL) { 71 if (a->stat == b->stat) 72 return 0; 73 74 if ((char *)a->stat < (char *)b->stat) 75 return -1; 76 77 return 1; 78 } 79 80 if (a->evsel == b->evsel) 81 return 0; 82 if ((char *)a->evsel < (char *)b->evsel) 83 return -1; 84 return +1; 85 } 86 87 static struct rb_node *saved_value_new(struct rblist *rblist __maybe_unused, 88 const void *entry) 89 { 90 struct saved_value *nd = malloc(sizeof(struct saved_value)); 91 92 if (!nd) 93 return NULL; 94 memcpy(nd, entry, sizeof(struct saved_value)); 95 return &nd->rb_node; 96 } 97 98 static void saved_value_delete(struct rblist *rblist __maybe_unused, 99 struct rb_node *rb_node) 100 { 101 struct saved_value *v; 102 103 BUG_ON(!rb_node); 104 v = container_of(rb_node, struct saved_value, rb_node); 105 free(v); 106 } 107 108 static struct saved_value *saved_value_lookup(struct evsel *evsel, 109 int cpu_map_idx, 110 bool create, 111 enum stat_type type, 112 int ctx, 113 struct runtime_stat *st, 114 struct cgroup *cgrp) 115 { 116 struct rblist *rblist; 117 struct rb_node *nd; 118 struct saved_value dm = { 119 .cpu_map_idx = cpu_map_idx, 120 .evsel = evsel, 121 .type = type, 122 .ctx = ctx, 123 .stat = st, 124 .cgrp = cgrp, 125 }; 126 127 rblist = &st->value_list; 128 129 /* don't use context info for clock events */ 130 if (type == STAT_NSECS) 131 dm.ctx = 0; 132 133 nd = rblist__find(rblist, &dm); 134 if (nd) 135 return container_of(nd, struct saved_value, rb_node); 136 if (create) { 137 rblist__add_node(rblist, &dm); 138 nd = rblist__find(rblist, &dm); 139 if (nd) 140 return container_of(nd, struct saved_value, rb_node); 141 } 142 return NULL; 143 } 144 145 void runtime_stat__init(struct runtime_stat *st) 146 { 147 struct rblist *rblist = &st->value_list; 148 149 rblist__init(rblist); 150 rblist->node_cmp = saved_value_cmp; 151 rblist->node_new = saved_value_new; 152 rblist->node_delete = saved_value_delete; 153 } 154 155 void runtime_stat__exit(struct runtime_stat *st) 156 { 157 rblist__exit(&st->value_list); 158 } 159 160 void perf_stat__init_shadow_stats(void) 161 { 162 runtime_stat__init(&rt_stat); 163 } 164 165 static int evsel_context(struct evsel *evsel) 166 { 167 int ctx = 0; 168 169 if (evsel->core.attr.exclude_kernel) 170 ctx |= CTX_BIT_KERNEL; 171 if (evsel->core.attr.exclude_user) 172 ctx |= CTX_BIT_USER; 173 if (evsel->core.attr.exclude_hv) 174 ctx |= CTX_BIT_HV; 175 if (evsel->core.attr.exclude_host) 176 ctx |= CTX_BIT_HOST; 177 if (evsel->core.attr.exclude_idle) 178 ctx |= CTX_BIT_IDLE; 179 180 return ctx; 181 } 182 183 static void reset_stat(struct runtime_stat *st) 184 { 185 struct rblist *rblist; 186 struct rb_node *pos, *next; 187 188 rblist = &st->value_list; 189 next = rb_first_cached(&rblist->entries); 190 while (next) { 191 pos = next; 192 next = rb_next(pos); 193 memset(&container_of(pos, struct saved_value, rb_node)->stats, 194 0, 195 sizeof(struct stats)); 196 } 197 } 198 199 void perf_stat__reset_shadow_stats(void) 200 { 201 reset_stat(&rt_stat); 202 memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats)); 203 memset(&ru_stats, 0, sizeof(ru_stats)); 204 } 205 206 void perf_stat__reset_shadow_per_stat(struct runtime_stat *st) 207 { 208 reset_stat(st); 209 } 210 211 struct runtime_stat_data { 212 int ctx; 213 struct cgroup *cgrp; 214 }; 215 216 static void update_runtime_stat(struct runtime_stat *st, 217 enum stat_type type, 218 int cpu_map_idx, u64 count, 219 struct runtime_stat_data *rsd) 220 { 221 struct saved_value *v = saved_value_lookup(NULL, cpu_map_idx, true, type, 222 rsd->ctx, st, rsd->cgrp); 223 224 if (v) 225 update_stats(&v->stats, count); 226 } 227 228 /* 229 * Update various tracking values we maintain to print 230 * more semantic information such as miss/hit ratios, 231 * instruction rates, etc: 232 */ 233 void perf_stat__update_shadow_stats(struct evsel *counter, u64 count, 234 int cpu_map_idx, struct runtime_stat *st) 235 { 236 u64 count_ns = count; 237 struct saved_value *v; 238 struct runtime_stat_data rsd = { 239 .ctx = evsel_context(counter), 240 .cgrp = counter->cgrp, 241 }; 242 243 count *= counter->scale; 244 245 if (evsel__is_clock(counter)) 246 update_runtime_stat(st, STAT_NSECS, cpu_map_idx, count_ns, &rsd); 247 else if (evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) 248 update_runtime_stat(st, STAT_CYCLES, cpu_map_idx, count, &rsd); 249 else if (perf_stat_evsel__is(counter, CYCLES_IN_TX)) 250 update_runtime_stat(st, STAT_CYCLES_IN_TX, cpu_map_idx, count, &rsd); 251 else if (perf_stat_evsel__is(counter, TRANSACTION_START)) 252 update_runtime_stat(st, STAT_TRANSACTION, cpu_map_idx, count, &rsd); 253 else if (perf_stat_evsel__is(counter, ELISION_START)) 254 update_runtime_stat(st, STAT_ELISION, cpu_map_idx, count, &rsd); 255 else if (perf_stat_evsel__is(counter, TOPDOWN_TOTAL_SLOTS)) 256 update_runtime_stat(st, STAT_TOPDOWN_TOTAL_SLOTS, 257 cpu_map_idx, count, &rsd); 258 else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_ISSUED)) 259 update_runtime_stat(st, STAT_TOPDOWN_SLOTS_ISSUED, 260 cpu_map_idx, count, &rsd); 261 else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_RETIRED)) 262 update_runtime_stat(st, STAT_TOPDOWN_SLOTS_RETIRED, 263 cpu_map_idx, count, &rsd); 264 else if (perf_stat_evsel__is(counter, TOPDOWN_FETCH_BUBBLES)) 265 update_runtime_stat(st, STAT_TOPDOWN_FETCH_BUBBLES, 266 cpu_map_idx, count, &rsd); 267 else if (perf_stat_evsel__is(counter, TOPDOWN_RECOVERY_BUBBLES)) 268 update_runtime_stat(st, STAT_TOPDOWN_RECOVERY_BUBBLES, 269 cpu_map_idx, count, &rsd); 270 else if (perf_stat_evsel__is(counter, TOPDOWN_RETIRING)) 271 update_runtime_stat(st, STAT_TOPDOWN_RETIRING, 272 cpu_map_idx, count, &rsd); 273 else if (perf_stat_evsel__is(counter, TOPDOWN_BAD_SPEC)) 274 update_runtime_stat(st, STAT_TOPDOWN_BAD_SPEC, 275 cpu_map_idx, count, &rsd); 276 else if (perf_stat_evsel__is(counter, TOPDOWN_FE_BOUND)) 277 update_runtime_stat(st, STAT_TOPDOWN_FE_BOUND, 278 cpu_map_idx, count, &rsd); 279 else if (perf_stat_evsel__is(counter, TOPDOWN_BE_BOUND)) 280 update_runtime_stat(st, STAT_TOPDOWN_BE_BOUND, 281 cpu_map_idx, count, &rsd); 282 else if (perf_stat_evsel__is(counter, TOPDOWN_HEAVY_OPS)) 283 update_runtime_stat(st, STAT_TOPDOWN_HEAVY_OPS, 284 cpu_map_idx, count, &rsd); 285 else if (perf_stat_evsel__is(counter, TOPDOWN_BR_MISPREDICT)) 286 update_runtime_stat(st, STAT_TOPDOWN_BR_MISPREDICT, 287 cpu_map_idx, count, &rsd); 288 else if (perf_stat_evsel__is(counter, TOPDOWN_FETCH_LAT)) 289 update_runtime_stat(st, STAT_TOPDOWN_FETCH_LAT, 290 cpu_map_idx, count, &rsd); 291 else if (perf_stat_evsel__is(counter, TOPDOWN_MEM_BOUND)) 292 update_runtime_stat(st, STAT_TOPDOWN_MEM_BOUND, 293 cpu_map_idx, count, &rsd); 294 else if (evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) 295 update_runtime_stat(st, STAT_STALLED_CYCLES_FRONT, 296 cpu_map_idx, count, &rsd); 297 else if (evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND)) 298 update_runtime_stat(st, STAT_STALLED_CYCLES_BACK, 299 cpu_map_idx, count, &rsd); 300 else if (evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) 301 update_runtime_stat(st, STAT_BRANCHES, cpu_map_idx, count, &rsd); 302 else if (evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES)) 303 update_runtime_stat(st, STAT_CACHEREFS, cpu_map_idx, count, &rsd); 304 else if (evsel__match(counter, HW_CACHE, HW_CACHE_L1D)) 305 update_runtime_stat(st, STAT_L1_DCACHE, cpu_map_idx, count, &rsd); 306 else if (evsel__match(counter, HW_CACHE, HW_CACHE_L1I)) 307 update_runtime_stat(st, STAT_L1_ICACHE, cpu_map_idx, count, &rsd); 308 else if (evsel__match(counter, HW_CACHE, HW_CACHE_LL)) 309 update_runtime_stat(st, STAT_LL_CACHE, cpu_map_idx, count, &rsd); 310 else if (evsel__match(counter, HW_CACHE, HW_CACHE_DTLB)) 311 update_runtime_stat(st, STAT_DTLB_CACHE, cpu_map_idx, count, &rsd); 312 else if (evsel__match(counter, HW_CACHE, HW_CACHE_ITLB)) 313 update_runtime_stat(st, STAT_ITLB_CACHE, cpu_map_idx, count, &rsd); 314 else if (perf_stat_evsel__is(counter, SMI_NUM)) 315 update_runtime_stat(st, STAT_SMI_NUM, cpu_map_idx, count, &rsd); 316 else if (perf_stat_evsel__is(counter, APERF)) 317 update_runtime_stat(st, STAT_APERF, cpu_map_idx, count, &rsd); 318 319 if (counter->collect_stat) { 320 v = saved_value_lookup(counter, cpu_map_idx, true, STAT_NONE, 0, st, 321 rsd.cgrp); 322 update_stats(&v->stats, count); 323 if (counter->metric_leader) 324 v->metric_total += count; 325 } else if (counter->metric_leader) { 326 v = saved_value_lookup(counter->metric_leader, 327 cpu_map_idx, true, STAT_NONE, 0, st, rsd.cgrp); 328 v->metric_total += count; 329 v->metric_other++; 330 } 331 } 332 333 /* used for get_ratio_color() */ 334 enum grc_type { 335 GRC_STALLED_CYCLES_FE, 336 GRC_STALLED_CYCLES_BE, 337 GRC_CACHE_MISSES, 338 GRC_MAX_NR 339 }; 340 341 static const char *get_ratio_color(enum grc_type type, double ratio) 342 { 343 static const double grc_table[GRC_MAX_NR][3] = { 344 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 }, 345 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 }, 346 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 }, 347 }; 348 const char *color = PERF_COLOR_NORMAL; 349 350 if (ratio > grc_table[type][0]) 351 color = PERF_COLOR_RED; 352 else if (ratio > grc_table[type][1]) 353 color = PERF_COLOR_MAGENTA; 354 else if (ratio > grc_table[type][2]) 355 color = PERF_COLOR_YELLOW; 356 357 return color; 358 } 359 360 static struct evsel *perf_stat__find_event(struct evlist *evsel_list, 361 const char *name) 362 { 363 struct evsel *c2; 364 365 evlist__for_each_entry (evsel_list, c2) { 366 if (!strcasecmp(c2->name, name) && !c2->collect_stat) 367 return c2; 368 } 369 return NULL; 370 } 371 372 /* Mark MetricExpr target events and link events using them to them. */ 373 void perf_stat__collect_metric_expr(struct evlist *evsel_list) 374 { 375 struct evsel *counter, *leader, **metric_events, *oc; 376 bool found; 377 struct expr_parse_ctx *ctx; 378 struct hashmap_entry *cur; 379 size_t bkt; 380 int i; 381 382 ctx = expr__ctx_new(); 383 if (!ctx) { 384 pr_debug("expr__ctx_new failed"); 385 return; 386 } 387 evlist__for_each_entry(evsel_list, counter) { 388 bool invalid = false; 389 390 leader = evsel__leader(counter); 391 if (!counter->metric_expr) 392 continue; 393 394 expr__ctx_clear(ctx); 395 metric_events = counter->metric_events; 396 if (!metric_events) { 397 if (expr__find_ids(counter->metric_expr, 398 counter->name, 399 ctx) < 0) 400 continue; 401 402 metric_events = calloc(sizeof(struct evsel *), 403 hashmap__size(ctx->ids) + 1); 404 if (!metric_events) { 405 expr__ctx_free(ctx); 406 return; 407 } 408 counter->metric_events = metric_events; 409 } 410 411 i = 0; 412 hashmap__for_each_entry(ctx->ids, cur, bkt) { 413 const char *metric_name = (const char *)cur->key; 414 415 found = false; 416 if (leader) { 417 /* Search in group */ 418 for_each_group_member (oc, leader) { 419 if (!strcasecmp(oc->name, 420 metric_name) && 421 !oc->collect_stat) { 422 found = true; 423 break; 424 } 425 } 426 } 427 if (!found) { 428 /* Search ignoring groups */ 429 oc = perf_stat__find_event(evsel_list, 430 metric_name); 431 } 432 if (!oc) { 433 /* Deduping one is good enough to handle duplicated PMUs. */ 434 static char *printed; 435 436 /* 437 * Adding events automatically would be difficult, because 438 * it would risk creating groups that are not schedulable. 439 * perf stat doesn't understand all the scheduling constraints 440 * of events. So we ask the user instead to add the missing 441 * events. 442 */ 443 if (!printed || 444 strcasecmp(printed, metric_name)) { 445 fprintf(stderr, 446 "Add %s event to groups to get metric expression for %s\n", 447 metric_name, 448 counter->name); 449 free(printed); 450 printed = strdup(metric_name); 451 } 452 invalid = true; 453 continue; 454 } 455 metric_events[i++] = oc; 456 oc->collect_stat = true; 457 } 458 metric_events[i] = NULL; 459 if (invalid) { 460 free(metric_events); 461 counter->metric_events = NULL; 462 counter->metric_expr = NULL; 463 } 464 } 465 expr__ctx_free(ctx); 466 } 467 468 static double runtime_stat_avg(struct runtime_stat *st, 469 enum stat_type type, int cpu_map_idx, 470 struct runtime_stat_data *rsd) 471 { 472 struct saved_value *v; 473 474 v = saved_value_lookup(NULL, cpu_map_idx, false, type, rsd->ctx, st, rsd->cgrp); 475 if (!v) 476 return 0.0; 477 478 return avg_stats(&v->stats); 479 } 480 481 static double runtime_stat_n(struct runtime_stat *st, 482 enum stat_type type, int cpu_map_idx, 483 struct runtime_stat_data *rsd) 484 { 485 struct saved_value *v; 486 487 v = saved_value_lookup(NULL, cpu_map_idx, false, type, rsd->ctx, st, rsd->cgrp); 488 if (!v) 489 return 0.0; 490 491 return v->stats.n; 492 } 493 494 static void print_stalled_cycles_frontend(struct perf_stat_config *config, 495 int cpu_map_idx, double avg, 496 struct perf_stat_output_ctx *out, 497 struct runtime_stat *st, 498 struct runtime_stat_data *rsd) 499 { 500 double total, ratio = 0.0; 501 const char *color; 502 503 total = runtime_stat_avg(st, STAT_CYCLES, cpu_map_idx, rsd); 504 505 if (total) 506 ratio = avg / total * 100.0; 507 508 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio); 509 510 if (ratio) 511 out->print_metric(config, out->ctx, color, "%7.2f%%", "frontend cycles idle", 512 ratio); 513 else 514 out->print_metric(config, out->ctx, NULL, NULL, "frontend cycles idle", 0); 515 } 516 517 static void print_stalled_cycles_backend(struct perf_stat_config *config, 518 int cpu_map_idx, double avg, 519 struct perf_stat_output_ctx *out, 520 struct runtime_stat *st, 521 struct runtime_stat_data *rsd) 522 { 523 double total, ratio = 0.0; 524 const char *color; 525 526 total = runtime_stat_avg(st, STAT_CYCLES, cpu_map_idx, rsd); 527 528 if (total) 529 ratio = avg / total * 100.0; 530 531 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio); 532 533 out->print_metric(config, out->ctx, color, "%7.2f%%", "backend cycles idle", ratio); 534 } 535 536 static void print_branch_misses(struct perf_stat_config *config, 537 int cpu_map_idx, double avg, 538 struct perf_stat_output_ctx *out, 539 struct runtime_stat *st, 540 struct runtime_stat_data *rsd) 541 { 542 double total, ratio = 0.0; 543 const char *color; 544 545 total = runtime_stat_avg(st, STAT_BRANCHES, cpu_map_idx, rsd); 546 547 if (total) 548 ratio = avg / total * 100.0; 549 550 color = get_ratio_color(GRC_CACHE_MISSES, ratio); 551 552 out->print_metric(config, out->ctx, color, "%7.2f%%", "of all branches", ratio); 553 } 554 555 static void print_l1_dcache_misses(struct perf_stat_config *config, 556 int cpu_map_idx, double avg, 557 struct perf_stat_output_ctx *out, 558 struct runtime_stat *st, 559 struct runtime_stat_data *rsd) 560 { 561 double total, ratio = 0.0; 562 const char *color; 563 564 total = runtime_stat_avg(st, STAT_L1_DCACHE, cpu_map_idx, rsd); 565 566 if (total) 567 ratio = avg / total * 100.0; 568 569 color = get_ratio_color(GRC_CACHE_MISSES, ratio); 570 571 out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-dcache accesses", ratio); 572 } 573 574 static void print_l1_icache_misses(struct perf_stat_config *config, 575 int cpu_map_idx, double avg, 576 struct perf_stat_output_ctx *out, 577 struct runtime_stat *st, 578 struct runtime_stat_data *rsd) 579 { 580 double total, ratio = 0.0; 581 const char *color; 582 583 total = runtime_stat_avg(st, STAT_L1_ICACHE, cpu_map_idx, rsd); 584 585 if (total) 586 ratio = avg / total * 100.0; 587 588 color = get_ratio_color(GRC_CACHE_MISSES, ratio); 589 out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-icache accesses", ratio); 590 } 591 592 static void print_dtlb_cache_misses(struct perf_stat_config *config, 593 int cpu_map_idx, double avg, 594 struct perf_stat_output_ctx *out, 595 struct runtime_stat *st, 596 struct runtime_stat_data *rsd) 597 { 598 double total, ratio = 0.0; 599 const char *color; 600 601 total = runtime_stat_avg(st, STAT_DTLB_CACHE, cpu_map_idx, rsd); 602 603 if (total) 604 ratio = avg / total * 100.0; 605 606 color = get_ratio_color(GRC_CACHE_MISSES, ratio); 607 out->print_metric(config, out->ctx, color, "%7.2f%%", "of all dTLB cache accesses", ratio); 608 } 609 610 static void print_itlb_cache_misses(struct perf_stat_config *config, 611 int cpu_map_idx, double avg, 612 struct perf_stat_output_ctx *out, 613 struct runtime_stat *st, 614 struct runtime_stat_data *rsd) 615 { 616 double total, ratio = 0.0; 617 const char *color; 618 619 total = runtime_stat_avg(st, STAT_ITLB_CACHE, cpu_map_idx, rsd); 620 621 if (total) 622 ratio = avg / total * 100.0; 623 624 color = get_ratio_color(GRC_CACHE_MISSES, ratio); 625 out->print_metric(config, out->ctx, color, "%7.2f%%", "of all iTLB cache accesses", ratio); 626 } 627 628 static void print_ll_cache_misses(struct perf_stat_config *config, 629 int cpu_map_idx, double avg, 630 struct perf_stat_output_ctx *out, 631 struct runtime_stat *st, 632 struct runtime_stat_data *rsd) 633 { 634 double total, ratio = 0.0; 635 const char *color; 636 637 total = runtime_stat_avg(st, STAT_LL_CACHE, cpu_map_idx, rsd); 638 639 if (total) 640 ratio = avg / total * 100.0; 641 642 color = get_ratio_color(GRC_CACHE_MISSES, ratio); 643 out->print_metric(config, out->ctx, color, "%7.2f%%", "of all LL-cache accesses", ratio); 644 } 645 646 /* 647 * High level "TopDown" CPU core pipe line bottleneck break down. 648 * 649 * Basic concept following 650 * Yasin, A Top Down Method for Performance analysis and Counter architecture 651 * ISPASS14 652 * 653 * The CPU pipeline is divided into 4 areas that can be bottlenecks: 654 * 655 * Frontend -> Backend -> Retiring 656 * BadSpeculation in addition means out of order execution that is thrown away 657 * (for example branch mispredictions) 658 * Frontend is instruction decoding. 659 * Backend is execution, like computation and accessing data in memory 660 * Retiring is good execution that is not directly bottlenecked 661 * 662 * The formulas are computed in slots. 663 * A slot is an entry in the pipeline each for the pipeline width 664 * (for example a 4-wide pipeline has 4 slots for each cycle) 665 * 666 * Formulas: 667 * BadSpeculation = ((SlotsIssued - SlotsRetired) + RecoveryBubbles) / 668 * TotalSlots 669 * Retiring = SlotsRetired / TotalSlots 670 * FrontendBound = FetchBubbles / TotalSlots 671 * BackendBound = 1.0 - BadSpeculation - Retiring - FrontendBound 672 * 673 * The kernel provides the mapping to the low level CPU events and any scaling 674 * needed for the CPU pipeline width, for example: 675 * 676 * TotalSlots = Cycles * 4 677 * 678 * The scaling factor is communicated in the sysfs unit. 679 * 680 * In some cases the CPU may not be able to measure all the formulas due to 681 * missing events. In this case multiple formulas are combined, as possible. 682 * 683 * Full TopDown supports more levels to sub-divide each area: for example 684 * BackendBound into computing bound and memory bound. For now we only 685 * support Level 1 TopDown. 686 */ 687 688 static double sanitize_val(double x) 689 { 690 if (x < 0 && x >= -0.02) 691 return 0.0; 692 return x; 693 } 694 695 static double td_total_slots(int cpu_map_idx, struct runtime_stat *st, 696 struct runtime_stat_data *rsd) 697 { 698 return runtime_stat_avg(st, STAT_TOPDOWN_TOTAL_SLOTS, cpu_map_idx, rsd); 699 } 700 701 static double td_bad_spec(int cpu_map_idx, struct runtime_stat *st, 702 struct runtime_stat_data *rsd) 703 { 704 double bad_spec = 0; 705 double total_slots; 706 double total; 707 708 total = runtime_stat_avg(st, STAT_TOPDOWN_SLOTS_ISSUED, cpu_map_idx, rsd) - 709 runtime_stat_avg(st, STAT_TOPDOWN_SLOTS_RETIRED, cpu_map_idx, rsd) + 710 runtime_stat_avg(st, STAT_TOPDOWN_RECOVERY_BUBBLES, cpu_map_idx, rsd); 711 712 total_slots = td_total_slots(cpu_map_idx, st, rsd); 713 if (total_slots) 714 bad_spec = total / total_slots; 715 return sanitize_val(bad_spec); 716 } 717 718 static double td_retiring(int cpu_map_idx, struct runtime_stat *st, 719 struct runtime_stat_data *rsd) 720 { 721 double retiring = 0; 722 double total_slots = td_total_slots(cpu_map_idx, st, rsd); 723 double ret_slots = runtime_stat_avg(st, STAT_TOPDOWN_SLOTS_RETIRED, 724 cpu_map_idx, rsd); 725 726 if (total_slots) 727 retiring = ret_slots / total_slots; 728 return retiring; 729 } 730 731 static double td_fe_bound(int cpu_map_idx, struct runtime_stat *st, 732 struct runtime_stat_data *rsd) 733 { 734 double fe_bound = 0; 735 double total_slots = td_total_slots(cpu_map_idx, st, rsd); 736 double fetch_bub = runtime_stat_avg(st, STAT_TOPDOWN_FETCH_BUBBLES, 737 cpu_map_idx, rsd); 738 739 if (total_slots) 740 fe_bound = fetch_bub / total_slots; 741 return fe_bound; 742 } 743 744 static double td_be_bound(int cpu_map_idx, struct runtime_stat *st, 745 struct runtime_stat_data *rsd) 746 { 747 double sum = (td_fe_bound(cpu_map_idx, st, rsd) + 748 td_bad_spec(cpu_map_idx, st, rsd) + 749 td_retiring(cpu_map_idx, st, rsd)); 750 if (sum == 0) 751 return 0; 752 return sanitize_val(1.0 - sum); 753 } 754 755 /* 756 * Kernel reports metrics multiplied with slots. To get back 757 * the ratios we need to recreate the sum. 758 */ 759 760 static double td_metric_ratio(int cpu_map_idx, enum stat_type type, 761 struct runtime_stat *stat, 762 struct runtime_stat_data *rsd) 763 { 764 double sum = runtime_stat_avg(stat, STAT_TOPDOWN_RETIRING, cpu_map_idx, rsd) + 765 runtime_stat_avg(stat, STAT_TOPDOWN_FE_BOUND, cpu_map_idx, rsd) + 766 runtime_stat_avg(stat, STAT_TOPDOWN_BE_BOUND, cpu_map_idx, rsd) + 767 runtime_stat_avg(stat, STAT_TOPDOWN_BAD_SPEC, cpu_map_idx, rsd); 768 double d = runtime_stat_avg(stat, type, cpu_map_idx, rsd); 769 770 if (sum) 771 return d / sum; 772 return 0; 773 } 774 775 /* 776 * ... but only if most of the values are actually available. 777 * We allow two missing. 778 */ 779 780 static bool full_td(int cpu_map_idx, struct runtime_stat *stat, 781 struct runtime_stat_data *rsd) 782 { 783 int c = 0; 784 785 if (runtime_stat_avg(stat, STAT_TOPDOWN_RETIRING, cpu_map_idx, rsd) > 0) 786 c++; 787 if (runtime_stat_avg(stat, STAT_TOPDOWN_BE_BOUND, cpu_map_idx, rsd) > 0) 788 c++; 789 if (runtime_stat_avg(stat, STAT_TOPDOWN_FE_BOUND, cpu_map_idx, rsd) > 0) 790 c++; 791 if (runtime_stat_avg(stat, STAT_TOPDOWN_BAD_SPEC, cpu_map_idx, rsd) > 0) 792 c++; 793 return c >= 2; 794 } 795 796 static void print_smi_cost(struct perf_stat_config *config, int cpu_map_idx, 797 struct perf_stat_output_ctx *out, 798 struct runtime_stat *st, 799 struct runtime_stat_data *rsd) 800 { 801 double smi_num, aperf, cycles, cost = 0.0; 802 const char *color = NULL; 803 804 smi_num = runtime_stat_avg(st, STAT_SMI_NUM, cpu_map_idx, rsd); 805 aperf = runtime_stat_avg(st, STAT_APERF, cpu_map_idx, rsd); 806 cycles = runtime_stat_avg(st, STAT_CYCLES, cpu_map_idx, rsd); 807 808 if ((cycles == 0) || (aperf == 0)) 809 return; 810 811 if (smi_num) 812 cost = (aperf - cycles) / aperf * 100.00; 813 814 if (cost > 10) 815 color = PERF_COLOR_RED; 816 out->print_metric(config, out->ctx, color, "%8.1f%%", "SMI cycles%", cost); 817 out->print_metric(config, out->ctx, NULL, "%4.0f", "SMI#", smi_num); 818 } 819 820 static int prepare_metric(struct evsel **metric_events, 821 struct metric_ref *metric_refs, 822 struct expr_parse_ctx *pctx, 823 int cpu_map_idx, 824 struct runtime_stat *st) 825 { 826 double scale; 827 char *n; 828 int i, j, ret; 829 830 for (i = 0; metric_events[i]; i++) { 831 struct saved_value *v; 832 struct stats *stats; 833 u64 metric_total = 0; 834 int source_count; 835 836 if (evsel__is_tool(metric_events[i])) { 837 source_count = 1; 838 switch (metric_events[i]->tool_event) { 839 case PERF_TOOL_DURATION_TIME: 840 stats = &walltime_nsecs_stats; 841 scale = 1e-9; 842 break; 843 case PERF_TOOL_USER_TIME: 844 stats = &ru_stats.ru_utime_usec_stat; 845 scale = 1e-6; 846 break; 847 case PERF_TOOL_SYSTEM_TIME: 848 stats = &ru_stats.ru_stime_usec_stat; 849 scale = 1e-6; 850 break; 851 case PERF_TOOL_NONE: 852 pr_err("Invalid tool event 'none'"); 853 abort(); 854 case PERF_TOOL_MAX: 855 pr_err("Invalid tool event 'max'"); 856 abort(); 857 default: 858 pr_err("Unknown tool event '%s'", evsel__name(metric_events[i])); 859 abort(); 860 } 861 } else { 862 v = saved_value_lookup(metric_events[i], cpu_map_idx, false, 863 STAT_NONE, 0, st, 864 metric_events[i]->cgrp); 865 if (!v) 866 break; 867 stats = &v->stats; 868 scale = 1.0; 869 source_count = evsel__source_count(metric_events[i]); 870 871 if (v->metric_other) 872 metric_total = v->metric_total; 873 } 874 n = strdup(evsel__metric_id(metric_events[i])); 875 if (!n) 876 return -ENOMEM; 877 878 expr__add_id_val_source_count(pctx, n, 879 metric_total ? : avg_stats(stats) * scale, 880 source_count); 881 } 882 883 for (j = 0; metric_refs && metric_refs[j].metric_name; j++) { 884 ret = expr__add_ref(pctx, &metric_refs[j]); 885 if (ret) 886 return ret; 887 } 888 889 return i; 890 } 891 892 static void generic_metric(struct perf_stat_config *config, 893 const char *metric_expr, 894 struct evsel **metric_events, 895 struct metric_ref *metric_refs, 896 char *name, 897 const char *metric_name, 898 const char *metric_unit, 899 int runtime, 900 int cpu_map_idx, 901 struct perf_stat_output_ctx *out, 902 struct runtime_stat *st) 903 { 904 print_metric_t print_metric = out->print_metric; 905 struct expr_parse_ctx *pctx; 906 double ratio, scale; 907 int i; 908 void *ctxp = out->ctx; 909 910 pctx = expr__ctx_new(); 911 if (!pctx) 912 return; 913 914 pctx->runtime = runtime; 915 i = prepare_metric(metric_events, metric_refs, pctx, cpu_map_idx, st); 916 if (i < 0) { 917 expr__ctx_free(pctx); 918 return; 919 } 920 if (!metric_events[i]) { 921 if (expr__parse(&ratio, pctx, metric_expr) == 0) { 922 char *unit; 923 char metric_bf[64]; 924 925 if (metric_unit && metric_name) { 926 if (perf_pmu__convert_scale(metric_unit, 927 &unit, &scale) >= 0) { 928 ratio *= scale; 929 } 930 if (strstr(metric_expr, "?")) 931 scnprintf(metric_bf, sizeof(metric_bf), 932 "%s %s_%d", unit, metric_name, runtime); 933 else 934 scnprintf(metric_bf, sizeof(metric_bf), 935 "%s %s", unit, metric_name); 936 937 print_metric(config, ctxp, NULL, "%8.1f", 938 metric_bf, ratio); 939 } else { 940 print_metric(config, ctxp, NULL, "%8.2f", 941 metric_name ? 942 metric_name : 943 out->force_header ? name : "", 944 ratio); 945 } 946 } else { 947 print_metric(config, ctxp, NULL, NULL, 948 out->force_header ? 949 (metric_name ? metric_name : name) : "", 0); 950 } 951 } else { 952 print_metric(config, ctxp, NULL, NULL, 953 out->force_header ? 954 (metric_name ? metric_name : name) : "", 0); 955 } 956 957 expr__ctx_free(pctx); 958 } 959 960 double test_generic_metric(struct metric_expr *mexp, int cpu_map_idx, struct runtime_stat *st) 961 { 962 struct expr_parse_ctx *pctx; 963 double ratio = 0.0; 964 965 pctx = expr__ctx_new(); 966 if (!pctx) 967 return NAN; 968 969 if (prepare_metric(mexp->metric_events, mexp->metric_refs, pctx, cpu_map_idx, st) < 0) 970 goto out; 971 972 if (expr__parse(&ratio, pctx, mexp->metric_expr)) 973 ratio = 0.0; 974 975 out: 976 expr__ctx_free(pctx); 977 return ratio; 978 } 979 980 void perf_stat__print_shadow_stats(struct perf_stat_config *config, 981 struct evsel *evsel, 982 double avg, int cpu_map_idx, 983 struct perf_stat_output_ctx *out, 984 struct rblist *metric_events, 985 struct runtime_stat *st) 986 { 987 void *ctxp = out->ctx; 988 print_metric_t print_metric = out->print_metric; 989 double total, ratio = 0.0, total2; 990 const char *color = NULL; 991 struct runtime_stat_data rsd = { 992 .ctx = evsel_context(evsel), 993 .cgrp = evsel->cgrp, 994 }; 995 struct metric_event *me; 996 int num = 1; 997 998 if (config->iostat_run) { 999 iostat_print_metric(config, evsel, out); 1000 } else if (evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) { 1001 total = runtime_stat_avg(st, STAT_CYCLES, cpu_map_idx, &rsd); 1002 1003 if (total) { 1004 ratio = avg / total; 1005 print_metric(config, ctxp, NULL, "%7.2f ", 1006 "insn per cycle", ratio); 1007 } else { 1008 print_metric(config, ctxp, NULL, NULL, "insn per cycle", 0); 1009 } 1010 1011 total = runtime_stat_avg(st, STAT_STALLED_CYCLES_FRONT, cpu_map_idx, &rsd); 1012 1013 total = max(total, runtime_stat_avg(st, 1014 STAT_STALLED_CYCLES_BACK, 1015 cpu_map_idx, &rsd)); 1016 1017 if (total && avg) { 1018 out->new_line(config, ctxp); 1019 ratio = total / avg; 1020 print_metric(config, ctxp, NULL, "%7.2f ", 1021 "stalled cycles per insn", 1022 ratio); 1023 } 1024 } else if (evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES)) { 1025 if (runtime_stat_n(st, STAT_BRANCHES, cpu_map_idx, &rsd) != 0) 1026 print_branch_misses(config, cpu_map_idx, avg, out, st, &rsd); 1027 else 1028 print_metric(config, ctxp, NULL, NULL, "of all branches", 0); 1029 } else if ( 1030 evsel->core.attr.type == PERF_TYPE_HW_CACHE && 1031 evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_L1D | 1032 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 1033 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) { 1034 1035 if (runtime_stat_n(st, STAT_L1_DCACHE, cpu_map_idx, &rsd) != 0) 1036 print_l1_dcache_misses(config, cpu_map_idx, avg, out, st, &rsd); 1037 else 1038 print_metric(config, ctxp, NULL, NULL, "of all L1-dcache accesses", 0); 1039 } else if ( 1040 evsel->core.attr.type == PERF_TYPE_HW_CACHE && 1041 evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_L1I | 1042 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 1043 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) { 1044 1045 if (runtime_stat_n(st, STAT_L1_ICACHE, cpu_map_idx, &rsd) != 0) 1046 print_l1_icache_misses(config, cpu_map_idx, avg, out, st, &rsd); 1047 else 1048 print_metric(config, ctxp, NULL, NULL, "of all L1-icache accesses", 0); 1049 } else if ( 1050 evsel->core.attr.type == PERF_TYPE_HW_CACHE && 1051 evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_DTLB | 1052 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 1053 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) { 1054 1055 if (runtime_stat_n(st, STAT_DTLB_CACHE, cpu_map_idx, &rsd) != 0) 1056 print_dtlb_cache_misses(config, cpu_map_idx, avg, out, st, &rsd); 1057 else 1058 print_metric(config, ctxp, NULL, NULL, "of all dTLB cache accesses", 0); 1059 } else if ( 1060 evsel->core.attr.type == PERF_TYPE_HW_CACHE && 1061 evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_ITLB | 1062 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 1063 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) { 1064 1065 if (runtime_stat_n(st, STAT_ITLB_CACHE, cpu_map_idx, &rsd) != 0) 1066 print_itlb_cache_misses(config, cpu_map_idx, avg, out, st, &rsd); 1067 else 1068 print_metric(config, ctxp, NULL, NULL, "of all iTLB cache accesses", 0); 1069 } else if ( 1070 evsel->core.attr.type == PERF_TYPE_HW_CACHE && 1071 evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_LL | 1072 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) | 1073 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) { 1074 1075 if (runtime_stat_n(st, STAT_LL_CACHE, cpu_map_idx, &rsd) != 0) 1076 print_ll_cache_misses(config, cpu_map_idx, avg, out, st, &rsd); 1077 else 1078 print_metric(config, ctxp, NULL, NULL, "of all LL-cache accesses", 0); 1079 } else if (evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) { 1080 total = runtime_stat_avg(st, STAT_CACHEREFS, cpu_map_idx, &rsd); 1081 1082 if (total) 1083 ratio = avg * 100 / total; 1084 1085 if (runtime_stat_n(st, STAT_CACHEREFS, cpu_map_idx, &rsd) != 0) 1086 print_metric(config, ctxp, NULL, "%8.3f %%", 1087 "of all cache refs", ratio); 1088 else 1089 print_metric(config, ctxp, NULL, NULL, "of all cache refs", 0); 1090 } else if (evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) { 1091 print_stalled_cycles_frontend(config, cpu_map_idx, avg, out, st, &rsd); 1092 } else if (evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) { 1093 print_stalled_cycles_backend(config, cpu_map_idx, avg, out, st, &rsd); 1094 } else if (evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) { 1095 total = runtime_stat_avg(st, STAT_NSECS, cpu_map_idx, &rsd); 1096 1097 if (total) { 1098 ratio = avg / total; 1099 print_metric(config, ctxp, NULL, "%8.3f", "GHz", ratio); 1100 } else { 1101 print_metric(config, ctxp, NULL, NULL, "Ghz", 0); 1102 } 1103 } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX)) { 1104 total = runtime_stat_avg(st, STAT_CYCLES, cpu_map_idx, &rsd); 1105 1106 if (total) 1107 print_metric(config, ctxp, NULL, 1108 "%7.2f%%", "transactional cycles", 1109 100.0 * (avg / total)); 1110 else 1111 print_metric(config, ctxp, NULL, NULL, "transactional cycles", 1112 0); 1113 } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX_CP)) { 1114 total = runtime_stat_avg(st, STAT_CYCLES, cpu_map_idx, &rsd); 1115 total2 = runtime_stat_avg(st, STAT_CYCLES_IN_TX, cpu_map_idx, &rsd); 1116 1117 if (total2 < avg) 1118 total2 = avg; 1119 if (total) 1120 print_metric(config, ctxp, NULL, "%7.2f%%", "aborted cycles", 1121 100.0 * ((total2-avg) / total)); 1122 else 1123 print_metric(config, ctxp, NULL, NULL, "aborted cycles", 0); 1124 } else if (perf_stat_evsel__is(evsel, TRANSACTION_START)) { 1125 total = runtime_stat_avg(st, STAT_CYCLES_IN_TX, cpu_map_idx, &rsd); 1126 1127 if (avg) 1128 ratio = total / avg; 1129 1130 if (runtime_stat_n(st, STAT_CYCLES_IN_TX, cpu_map_idx, &rsd) != 0) 1131 print_metric(config, ctxp, NULL, "%8.0f", 1132 "cycles / transaction", ratio); 1133 else 1134 print_metric(config, ctxp, NULL, NULL, "cycles / transaction", 1135 0); 1136 } else if (perf_stat_evsel__is(evsel, ELISION_START)) { 1137 total = runtime_stat_avg(st, STAT_CYCLES_IN_TX, cpu_map_idx, &rsd); 1138 1139 if (avg) 1140 ratio = total / avg; 1141 1142 print_metric(config, ctxp, NULL, "%8.0f", "cycles / elision", ratio); 1143 } else if (evsel__is_clock(evsel)) { 1144 if ((ratio = avg_stats(&walltime_nsecs_stats)) != 0) 1145 print_metric(config, ctxp, NULL, "%8.3f", "CPUs utilized", 1146 avg / (ratio * evsel->scale)); 1147 else 1148 print_metric(config, ctxp, NULL, NULL, "CPUs utilized", 0); 1149 } else if (perf_stat_evsel__is(evsel, TOPDOWN_FETCH_BUBBLES)) { 1150 double fe_bound = td_fe_bound(cpu_map_idx, st, &rsd); 1151 1152 if (fe_bound > 0.2) 1153 color = PERF_COLOR_RED; 1154 print_metric(config, ctxp, color, "%8.1f%%", "frontend bound", 1155 fe_bound * 100.); 1156 } else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_RETIRED)) { 1157 double retiring = td_retiring(cpu_map_idx, st, &rsd); 1158 1159 if (retiring > 0.7) 1160 color = PERF_COLOR_GREEN; 1161 print_metric(config, ctxp, color, "%8.1f%%", "retiring", 1162 retiring * 100.); 1163 } else if (perf_stat_evsel__is(evsel, TOPDOWN_RECOVERY_BUBBLES)) { 1164 double bad_spec = td_bad_spec(cpu_map_idx, st, &rsd); 1165 1166 if (bad_spec > 0.1) 1167 color = PERF_COLOR_RED; 1168 print_metric(config, ctxp, color, "%8.1f%%", "bad speculation", 1169 bad_spec * 100.); 1170 } else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_ISSUED)) { 1171 double be_bound = td_be_bound(cpu_map_idx, st, &rsd); 1172 const char *name = "backend bound"; 1173 static int have_recovery_bubbles = -1; 1174 1175 /* In case the CPU does not support topdown-recovery-bubbles */ 1176 if (have_recovery_bubbles < 0) 1177 have_recovery_bubbles = pmu_have_event("cpu", 1178 "topdown-recovery-bubbles"); 1179 if (!have_recovery_bubbles) 1180 name = "backend bound/bad spec"; 1181 1182 if (be_bound > 0.2) 1183 color = PERF_COLOR_RED; 1184 if (td_total_slots(cpu_map_idx, st, &rsd) > 0) 1185 print_metric(config, ctxp, color, "%8.1f%%", name, 1186 be_bound * 100.); 1187 else 1188 print_metric(config, ctxp, NULL, NULL, name, 0); 1189 } else if (perf_stat_evsel__is(evsel, TOPDOWN_RETIRING) && 1190 full_td(cpu_map_idx, st, &rsd)) { 1191 double retiring = td_metric_ratio(cpu_map_idx, 1192 STAT_TOPDOWN_RETIRING, st, 1193 &rsd); 1194 if (retiring > 0.7) 1195 color = PERF_COLOR_GREEN; 1196 print_metric(config, ctxp, color, "%8.1f%%", "retiring", 1197 retiring * 100.); 1198 } else if (perf_stat_evsel__is(evsel, TOPDOWN_FE_BOUND) && 1199 full_td(cpu_map_idx, st, &rsd)) { 1200 double fe_bound = td_metric_ratio(cpu_map_idx, 1201 STAT_TOPDOWN_FE_BOUND, st, 1202 &rsd); 1203 if (fe_bound > 0.2) 1204 color = PERF_COLOR_RED; 1205 print_metric(config, ctxp, color, "%8.1f%%", "frontend bound", 1206 fe_bound * 100.); 1207 } else if (perf_stat_evsel__is(evsel, TOPDOWN_BE_BOUND) && 1208 full_td(cpu_map_idx, st, &rsd)) { 1209 double be_bound = td_metric_ratio(cpu_map_idx, 1210 STAT_TOPDOWN_BE_BOUND, st, 1211 &rsd); 1212 if (be_bound > 0.2) 1213 color = PERF_COLOR_RED; 1214 print_metric(config, ctxp, color, "%8.1f%%", "backend bound", 1215 be_bound * 100.); 1216 } else if (perf_stat_evsel__is(evsel, TOPDOWN_BAD_SPEC) && 1217 full_td(cpu_map_idx, st, &rsd)) { 1218 double bad_spec = td_metric_ratio(cpu_map_idx, 1219 STAT_TOPDOWN_BAD_SPEC, st, 1220 &rsd); 1221 if (bad_spec > 0.1) 1222 color = PERF_COLOR_RED; 1223 print_metric(config, ctxp, color, "%8.1f%%", "bad speculation", 1224 bad_spec * 100.); 1225 } else if (perf_stat_evsel__is(evsel, TOPDOWN_HEAVY_OPS) && 1226 full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) { 1227 double retiring = td_metric_ratio(cpu_map_idx, 1228 STAT_TOPDOWN_RETIRING, st, 1229 &rsd); 1230 double heavy_ops = td_metric_ratio(cpu_map_idx, 1231 STAT_TOPDOWN_HEAVY_OPS, st, 1232 &rsd); 1233 double light_ops = retiring - heavy_ops; 1234 1235 if (retiring > 0.7 && heavy_ops > 0.1) 1236 color = PERF_COLOR_GREEN; 1237 print_metric(config, ctxp, color, "%8.1f%%", "heavy operations", 1238 heavy_ops * 100.); 1239 if (retiring > 0.7 && light_ops > 0.6) 1240 color = PERF_COLOR_GREEN; 1241 else 1242 color = NULL; 1243 print_metric(config, ctxp, color, "%8.1f%%", "light operations", 1244 light_ops * 100.); 1245 } else if (perf_stat_evsel__is(evsel, TOPDOWN_BR_MISPREDICT) && 1246 full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) { 1247 double bad_spec = td_metric_ratio(cpu_map_idx, 1248 STAT_TOPDOWN_BAD_SPEC, st, 1249 &rsd); 1250 double br_mis = td_metric_ratio(cpu_map_idx, 1251 STAT_TOPDOWN_BR_MISPREDICT, st, 1252 &rsd); 1253 double m_clears = bad_spec - br_mis; 1254 1255 if (bad_spec > 0.1 && br_mis > 0.05) 1256 color = PERF_COLOR_RED; 1257 print_metric(config, ctxp, color, "%8.1f%%", "branch mispredict", 1258 br_mis * 100.); 1259 if (bad_spec > 0.1 && m_clears > 0.05) 1260 color = PERF_COLOR_RED; 1261 else 1262 color = NULL; 1263 print_metric(config, ctxp, color, "%8.1f%%", "machine clears", 1264 m_clears * 100.); 1265 } else if (perf_stat_evsel__is(evsel, TOPDOWN_FETCH_LAT) && 1266 full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) { 1267 double fe_bound = td_metric_ratio(cpu_map_idx, 1268 STAT_TOPDOWN_FE_BOUND, st, 1269 &rsd); 1270 double fetch_lat = td_metric_ratio(cpu_map_idx, 1271 STAT_TOPDOWN_FETCH_LAT, st, 1272 &rsd); 1273 double fetch_bw = fe_bound - fetch_lat; 1274 1275 if (fe_bound > 0.2 && fetch_lat > 0.15) 1276 color = PERF_COLOR_RED; 1277 print_metric(config, ctxp, color, "%8.1f%%", "fetch latency", 1278 fetch_lat * 100.); 1279 if (fe_bound > 0.2 && fetch_bw > 0.1) 1280 color = PERF_COLOR_RED; 1281 else 1282 color = NULL; 1283 print_metric(config, ctxp, color, "%8.1f%%", "fetch bandwidth", 1284 fetch_bw * 100.); 1285 } else if (perf_stat_evsel__is(evsel, TOPDOWN_MEM_BOUND) && 1286 full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) { 1287 double be_bound = td_metric_ratio(cpu_map_idx, 1288 STAT_TOPDOWN_BE_BOUND, st, 1289 &rsd); 1290 double mem_bound = td_metric_ratio(cpu_map_idx, 1291 STAT_TOPDOWN_MEM_BOUND, st, 1292 &rsd); 1293 double core_bound = be_bound - mem_bound; 1294 1295 if (be_bound > 0.2 && mem_bound > 0.2) 1296 color = PERF_COLOR_RED; 1297 print_metric(config, ctxp, color, "%8.1f%%", "memory bound", 1298 mem_bound * 100.); 1299 if (be_bound > 0.2 && core_bound > 0.1) 1300 color = PERF_COLOR_RED; 1301 else 1302 color = NULL; 1303 print_metric(config, ctxp, color, "%8.1f%%", "Core bound", 1304 core_bound * 100.); 1305 } else if (evsel->metric_expr) { 1306 generic_metric(config, evsel->metric_expr, evsel->metric_events, NULL, 1307 evsel->name, evsel->metric_name, NULL, 1, cpu_map_idx, out, st); 1308 } else if (runtime_stat_n(st, STAT_NSECS, cpu_map_idx, &rsd) != 0) { 1309 char unit = ' '; 1310 char unit_buf[10] = "/sec"; 1311 1312 total = runtime_stat_avg(st, STAT_NSECS, cpu_map_idx, &rsd); 1313 if (total) 1314 ratio = convert_unit_double(1000000000.0 * avg / total, &unit); 1315 1316 if (unit != ' ') 1317 snprintf(unit_buf, sizeof(unit_buf), "%c/sec", unit); 1318 print_metric(config, ctxp, NULL, "%8.3f", unit_buf, ratio); 1319 } else if (perf_stat_evsel__is(evsel, SMI_NUM)) { 1320 print_smi_cost(config, cpu_map_idx, out, st, &rsd); 1321 } else { 1322 num = 0; 1323 } 1324 1325 if ((me = metricgroup__lookup(metric_events, evsel, false)) != NULL) { 1326 struct metric_expr *mexp; 1327 1328 list_for_each_entry (mexp, &me->head, nd) { 1329 if (num++ > 0) 1330 out->new_line(config, ctxp); 1331 generic_metric(config, mexp->metric_expr, mexp->metric_events, 1332 mexp->metric_refs, evsel->name, mexp->metric_name, 1333 mexp->metric_unit, mexp->runtime, cpu_map_idx, out, st); 1334 } 1335 } 1336 if (num == 0) 1337 print_metric(config, ctxp, NULL, NULL, NULL, 0); 1338 } 1339