tools/perf/util/stat-shadow.c

   1 #include <stdio.h>
   2 #include "evsel.h"
   3 #include "stat.h"
   4 #include "color.h"
   5 #include "pmu.h"
   6 #include "rblist.h"
   7 #include "evlist.h"
   8 #include "expr.h"
   9
  10 enum {
  11         CTX_BIT_USER    = 1 << 0,
  12         CTX_BIT_KERNEL  = 1 << 1,
  13         CTX_BIT_HV      = 1 << 2,
  14         CTX_BIT_HOST    = 1 << 3,
  15         CTX_BIT_IDLE    = 1 << 4,
  16         CTX_BIT_MAX     = 1 << 5,
  17 };
  18
  19 #define NUM_CTX CTX_BIT_MAX
  20
  21 /*
  22  * AGGR_GLOBAL: Use CPU 0
  23  * AGGR_SOCKET: Use first CPU of socket
  24  * AGGR_CORE: Use first CPU of core
  25  * AGGR_NONE: Use matching CPU
  26  * AGGR_THREAD: Not supported?
  27  */
  28 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
  29 static struct stats runtime_cycles_stats[NUM_CTX][MAX_NR_CPUS];
  30 static struct stats runtime_stalled_cycles_front_stats[NUM_CTX][MAX_NR_CPUS];
  31 static struct stats runtime_stalled_cycles_back_stats[NUM_CTX][MAX_NR_CPUS];
  32 static struct stats runtime_branches_stats[NUM_CTX][MAX_NR_CPUS];
  33 static struct stats runtime_cacherefs_stats[NUM_CTX][MAX_NR_CPUS];
  34 static struct stats runtime_l1_dcache_stats[NUM_CTX][MAX_NR_CPUS];
  35 static struct stats runtime_l1_icache_stats[NUM_CTX][MAX_NR_CPUS];
  36 static struct stats runtime_ll_cache_stats[NUM_CTX][MAX_NR_CPUS];
  37 static struct stats runtime_itlb_cache_stats[NUM_CTX][MAX_NR_CPUS];
  38 static struct stats runtime_dtlb_cache_stats[NUM_CTX][MAX_NR_CPUS];
  39 static struct stats runtime_cycles_in_tx_stats[NUM_CTX][MAX_NR_CPUS];
  40 static struct stats runtime_transaction_stats[NUM_CTX][MAX_NR_CPUS];
  41 static struct stats runtime_elision_stats[NUM_CTX][MAX_NR_CPUS];
  42 static struct stats runtime_topdown_total_slots[NUM_CTX][MAX_NR_CPUS];
  43 static struct stats runtime_topdown_slots_issued[NUM_CTX][MAX_NR_CPUS];
  44 static struct stats runtime_topdown_slots_retired[NUM_CTX][MAX_NR_CPUS];
  45 static struct stats runtime_topdown_fetch_bubbles[NUM_CTX][MAX_NR_CPUS];
  46 static struct stats runtime_topdown_recovery_bubbles[NUM_CTX][MAX_NR_CPUS];
  47 static struct stats runtime_smi_num_stats[NUM_CTX][MAX_NR_CPUS];
  48 static struct stats runtime_aperf_stats[NUM_CTX][MAX_NR_CPUS];
  49 static struct rblist runtime_saved_values;
  50 static bool have_frontend_stalled;
  51
  52 struct stats walltime_nsecs_stats;
  53
  54 struct saved_value {
  55         struct rb_node rb_node;
  56         struct perf_evsel *evsel;
  57         int cpu;
  58         int ctx;
  59         struct stats stats;
  60 };
  61
  62 static int saved_value_cmp(struct rb_node *rb_node, const void *entry)
  63 {
  64         struct saved_value *a = container_of(rb_node,
  65                                              struct saved_value,
  66                                              rb_node);
  67         const struct saved_value *b = entry;
  68
  69         if (a->ctx != b->ctx)
  70                 return a->ctx - b->ctx;
  71         if (a->cpu != b->cpu)
  72                 return a->cpu - b->cpu;
  73         return a->evsel - b->evsel;
  74 }
  75
  76 static struct rb_node *saved_value_new(struct rblist *rblist __maybe_unused,
  77                                      const void *entry)
  78 {
  79         struct saved_value *nd = malloc(sizeof(struct saved_value));
  80
  81         if (!nd)
  82                 return NULL;
  83         memcpy(nd, entry, sizeof(struct saved_value));
  84         return &nd->rb_node;
  85 }
  86
  87 static struct saved_value *saved_value_lookup(struct perf_evsel *evsel,
  88                                               int cpu, int ctx,
  89                                               bool create)
  90 {
  91         struct rb_node *nd;
  92         struct saved_value dm = {
  93                 .cpu = cpu,
  94                 .ctx = ctx,
  95                 .evsel = evsel,
  96         };
  97         nd = rblist__find(&runtime_saved_values, &dm);
  98         if (nd)
  99                 return container_of(nd, struct saved_value, rb_node);
 100         if (create) {
 101                 rblist__add_node(&runtime_saved_values, &dm);
 102                 nd = rblist__find(&runtime_saved_values, &dm);
 103                 if (nd)
 104                         return container_of(nd, struct saved_value, rb_node);
 105         }
 106         return NULL;
 107 }
 108
 109 void perf_stat__init_shadow_stats(void)
 110 {
 111         have_frontend_stalled = pmu_have_event("cpu", "stalled-cycles-frontend");
 112         rblist__init(&runtime_saved_values);
 113         runtime_saved_values.node_cmp = saved_value_cmp;
 114         runtime_saved_values.node_new = saved_value_new;
 115         /* No delete for now */
 116 }
 117
 118 static int evsel_context(struct perf_evsel *evsel)
 119 {
 120         int ctx = 0;
 121
 122         if (evsel->attr.exclude_kernel)
 123                 ctx |= CTX_BIT_KERNEL;
 124         if (evsel->attr.exclude_user)
 125                 ctx |= CTX_BIT_USER;
 126         if (evsel->attr.exclude_hv)
 127                 ctx |= CTX_BIT_HV;
 128         if (evsel->attr.exclude_host)
 129                 ctx |= CTX_BIT_HOST;
 130         if (evsel->attr.exclude_idle)
 131                 ctx |= CTX_BIT_IDLE;
 132
 133         return ctx;
 134 }
 135
 136 void perf_stat__reset_shadow_stats(void)
 137 {
 138         struct rb_node *pos, *next;
 139
 140         memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
 141         memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
 142         memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
 143         memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
 144         memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
 145         memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
 146         memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
 147         memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
 148         memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
 149         memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
 150         memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
 151         memset(runtime_cycles_in_tx_stats, 0,
 152                         sizeof(runtime_cycles_in_tx_stats));
 153         memset(runtime_transaction_stats, 0,
 154                 sizeof(runtime_transaction_stats));
 155         memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
 156         memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
 157         memset(runtime_topdown_total_slots, 0, sizeof(runtime_topdown_total_slots));
 158         memset(runtime_topdown_slots_retired, 0, sizeof(runtime_topdown_slots_retired));
 159         memset(runtime_topdown_slots_issued, 0, sizeof(runtime_topdown_slots_issued));
 160         memset(runtime_topdown_fetch_bubbles, 0, sizeof(runtime_topdown_fetch_bubbles));
 161         memset(runtime_topdown_recovery_bubbles, 0, sizeof(runtime_topdown_recovery_bubbles));
 162         memset(runtime_smi_num_stats, 0, sizeof(runtime_smi_num_stats));
 163         memset(runtime_aperf_stats, 0, sizeof(runtime_aperf_stats));
 164
 165         next = rb_first(&runtime_saved_values.entries);
 166         while (next) {
 167                 pos = next;
 168                 next = rb_next(pos);
 169                 memset(&container_of(pos, struct saved_value, rb_node)->stats,
 170                        0,
 171                        sizeof(struct stats));
 172         }
 173 }
 174
 175 /*
 176  * Update various tracking values we maintain to print
 177  * more semantic information such as miss/hit ratios,
 178  * instruction rates, etc:
 179  */
 180 void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
 181                                     int cpu)
 182 {
 183         int ctx = evsel_context(counter);
 184
 185         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK) ||
 186             perf_evsel__match(counter, SOFTWARE, SW_CPU_CLOCK))
 187                 update_stats(&runtime_nsecs_stats[cpu], count[0]);
 188         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 189                 update_stats(&runtime_cycles_stats[ctx][cpu], count[0]);
 190         else if (perf_stat_evsel__is(counter, CYCLES_IN_TX))
 191                 update_stats(&runtime_cycles_in_tx_stats[ctx][cpu], count[0]);
 192         else if (perf_stat_evsel__is(counter, TRANSACTION_START))
 193                 update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
 194         else if (perf_stat_evsel__is(counter, ELISION_START))
 195                 update_stats(&runtime_elision_stats[ctx][cpu], count[0]);
 196         else if (perf_stat_evsel__is(counter, TOPDOWN_TOTAL_SLOTS))
 197                 update_stats(&runtime_topdown_total_slots[ctx][cpu], count[0]);
 198         else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_ISSUED))
 199                 update_stats(&runtime_topdown_slots_issued[ctx][cpu], count[0]);
 200         else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_RETIRED))
 201                 update_stats(&runtime_topdown_slots_retired[ctx][cpu], count[0]);
 202         else if (perf_stat_evsel__is(counter, TOPDOWN_FETCH_BUBBLES))
 203                 update_stats(&runtime_topdown_fetch_bubbles[ctx][cpu],count[0]);
 204         else if (perf_stat_evsel__is(counter, TOPDOWN_RECOVERY_BUBBLES))
 205                 update_stats(&runtime_topdown_recovery_bubbles[ctx][cpu], count[0]);
 206         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 207                 update_stats(&runtime_stalled_cycles_front_stats[ctx][cpu], count[0]);
 208         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 209                 update_stats(&runtime_stalled_cycles_back_stats[ctx][cpu], count[0]);
 210         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 211                 update_stats(&runtime_branches_stats[ctx][cpu], count[0]);
 212         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 213                 update_stats(&runtime_cacherefs_stats[ctx][cpu], count[0]);
 214         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 215                 update_stats(&runtime_l1_dcache_stats[ctx][cpu], count[0]);
 216         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 217                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 218         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 219                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 220         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 221                 update_stats(&runtime_dtlb_cache_stats[ctx][cpu], count[0]);
 222         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 223                 update_stats(&runtime_itlb_cache_stats[ctx][cpu], count[0]);
 224         else if (perf_stat_evsel__is(counter, SMI_NUM))
 225                 update_stats(&runtime_smi_num_stats[ctx][cpu], count[0]);
 226         else if (perf_stat_evsel__is(counter, APERF))
 227                 update_stats(&runtime_aperf_stats[ctx][cpu], count[0]);
 228
 229         if (counter->collect_stat) {
 230                 struct saved_value *v = saved_value_lookup(counter, cpu, ctx,
 231                                                            true);
 232                 update_stats(&v->stats, count[0]);
 233         }
 234 }
 235
 236 /* used for get_ratio_color() */
 237 enum grc_type {
 238         GRC_STALLED_CYCLES_FE,
 239         GRC_STALLED_CYCLES_BE,
 240         GRC_CACHE_MISSES,
 241         GRC_MAX_NR
 242 };
 243
 244 static const char *get_ratio_color(enum grc_type type, double ratio)
 245 {
 246         static const double grc_table[GRC_MAX_NR][3] = {
 247                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 248                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 249                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 250         };
 251         const char *color = PERF_COLOR_NORMAL;
 252
 253         if (ratio > grc_table[type][0])
 254                 color = PERF_COLOR_RED;
 255         else if (ratio > grc_table[type][1])
 256                 color = PERF_COLOR_MAGENTA;
 257         else if (ratio > grc_table[type][2])
 258                 color = PERF_COLOR_YELLOW;
 259
 260         return color;
 261 }
 262
 263 static struct perf_evsel *perf_stat__find_event(struct perf_evlist *evsel_list,
 264                                                 const char *name)
 265 {
 266         struct perf_evsel *c2;
 267
 268         evlist__for_each_entry (evsel_list, c2) {
 269                 if (!strcasecmp(c2->name, name))
 270                         return c2;
 271         }
 272         return NULL;
 273 }
 274
 275 /* Mark MetricExpr target events and link events using them to them. */
 276 void perf_stat__collect_metric_expr(struct perf_evlist *evsel_list)
 277 {
 278         struct perf_evsel *counter, *leader, **metric_events, *oc;
 279         bool found;
 280         const char **metric_names;
 281         int i;
 282         int num_metric_names;
 283
 284         evlist__for_each_entry(evsel_list, counter) {
 285                 bool invalid = false;
 286
 287                 leader = counter->leader;
 288                 if (!counter->metric_expr)
 289                         continue;
 290                 metric_events = counter->metric_events;
 291                 if (!metric_events) {
 292                         if (expr__find_other(counter->metric_expr, counter->name,
 293                                                 &metric_names, &num_metric_names) < 0)
 294                                 continue;
 295
 296                         metric_events = calloc(sizeof(struct perf_evsel *),
 297                                                num_metric_names + 1);
 298                         if (!metric_events)
 299                                 return;
 300                         counter->metric_events = metric_events;
 301                 }
 302
 303                 for (i = 0; i < num_metric_names; i++) {
 304                         found = false;
 305                         if (leader) {
 306                                 /* Search in group */
 307                                 for_each_group_member (oc, leader) {
 308                                         if (!strcasecmp(oc->name, metric_names[i])) {
 309                                                 found = true;
 310                                                 break;
 311                                         }
 312                                 }
 313                         }
 314                         if (!found) {
 315                                 /* Search ignoring groups */
 316                                 oc = perf_stat__find_event(evsel_list, metric_names[i]);
 317                         }
 318                         if (!oc) {
 319                                 /* Deduping one is good enough to handle duplicated PMUs. */
 320                                 static char *printed;
 321
 322                                 /*
 323                                  * Adding events automatically would be difficult, because
 324                                  * it would risk creating groups that are not schedulable.
 325                                  * perf stat doesn't understand all the scheduling constraints
 326                                  * of events. So we ask the user instead to add the missing
 327                                  * events.
 328                                  */
 329                                 if (!printed || strcasecmp(printed, metric_names[i])) {
 330                                         fprintf(stderr,
 331                                                 "Add %s event to groups to get metric expression for %s\n",
 332                                                 metric_names[i],
 333                                                 counter->name);
 334                                         printed = strdup(metric_names[i]);
 335                                 }
 336                                 invalid = true;
 337                                 continue;
 338                         }
 339                         metric_events[i] = oc;
 340                         oc->collect_stat = true;
 341                 }
 342                 metric_events[i] = NULL;
 343                 free(metric_names);
 344                 if (invalid) {
 345                         free(metric_events);
 346                         counter->metric_events = NULL;
 347                         counter->metric_expr = NULL;
 348                 }
 349         }
 350 }
 351
 352 static void print_stalled_cycles_frontend(int cpu,
 353                                           struct perf_evsel *evsel, double avg,
 354                                           struct perf_stat_output_ctx *out)
 355 {
 356         double total, ratio = 0.0;
 357         const char *color;
 358         int ctx = evsel_context(evsel);
 359
 360         total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 361
 362         if (total)
 363                 ratio = avg / total * 100.0;
 364
 365         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 366
 367         if (ratio)
 368                 out->print_metric(out->ctx, color, "%7.2f%%", "frontend cycles idle",
 369                                   ratio);
 370         else
 371                 out->print_metric(out->ctx, NULL, NULL, "frontend cycles idle", 0);
 372 }
 373
 374 static void print_stalled_cycles_backend(int cpu,
 375                                          struct perf_evsel *evsel, double avg,
 376                                          struct perf_stat_output_ctx *out)
 377 {
 378         double total, ratio = 0.0;
 379         const char *color;
 380         int ctx = evsel_context(evsel);
 381
 382         total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 383
 384         if (total)
 385                 ratio = avg / total * 100.0;
 386
 387         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 388
 389         out->print_metric(out->ctx, color, "%7.2f%%", "backend cycles idle", ratio);
 390 }
 391
 392 static void print_branch_misses(int cpu,
 393                                 struct perf_evsel *evsel,
 394                                 double avg,
 395                                 struct perf_stat_output_ctx *out)
 396 {
 397         double total, ratio = 0.0;
 398         const char *color;
 399         int ctx = evsel_context(evsel);
 400
 401         total = avg_stats(&runtime_branches_stats[ctx][cpu]);
 402
 403         if (total)
 404                 ratio = avg / total * 100.0;
 405
 406         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 407
 408         out->print_metric(out->ctx, color, "%7.2f%%", "of all branches", ratio);
 409 }
 410
 411 static void print_l1_dcache_misses(int cpu,
 412                                    struct perf_evsel *evsel,
 413                                    double avg,
 414                                    struct perf_stat_output_ctx *out)
 415 {
 416         double total, ratio = 0.0;
 417         const char *color;
 418         int ctx = evsel_context(evsel);
 419
 420         total = avg_stats(&runtime_l1_dcache_stats[ctx][cpu]);
 421
 422         if (total)
 423                 ratio = avg / total * 100.0;
 424
 425         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 426
 427         out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-dcache hits", ratio);
 428 }
 429
 430 static void print_l1_icache_misses(int cpu,
 431                                    struct perf_evsel *evsel,
 432                                    double avg,
 433                                    struct perf_stat_output_ctx *out)
 434 {
 435         double total, ratio = 0.0;
 436         const char *color;
 437         int ctx = evsel_context(evsel);
 438
 439         total = avg_stats(&runtime_l1_icache_stats[ctx][cpu]);
 440
 441         if (total)
 442                 ratio = avg / total * 100.0;
 443
 444         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 445         out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-icache hits", ratio);
 446 }
 447
 448 static void print_dtlb_cache_misses(int cpu,
 449                                     struct perf_evsel *evsel,
 450                                     double avg,
 451                                     struct perf_stat_output_ctx *out)
 452 {
 453         double total, ratio = 0.0;
 454         const char *color;
 455         int ctx = evsel_context(evsel);
 456
 457         total = avg_stats(&runtime_dtlb_cache_stats[ctx][cpu]);
 458
 459         if (total)
 460                 ratio = avg / total * 100.0;
 461
 462         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 463         out->print_metric(out->ctx, color, "%7.2f%%", "of all dTLB cache hits", ratio);
 464 }
 465
 466 static void print_itlb_cache_misses(int cpu,
 467                                     struct perf_evsel *evsel,
 468                                     double avg,
 469                                     struct perf_stat_output_ctx *out)
 470 {
 471         double total, ratio = 0.0;
 472         const char *color;
 473         int ctx = evsel_context(evsel);
 474
 475         total = avg_stats(&runtime_itlb_cache_stats[ctx][cpu]);
 476
 477         if (total)
 478                 ratio = avg / total * 100.0;
 479
 480         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 481         out->print_metric(out->ctx, color, "%7.2f%%", "of all iTLB cache hits", ratio);
 482 }
 483
 484 static void print_ll_cache_misses(int cpu,
 485                                   struct perf_evsel *evsel,
 486                                   double avg,
 487                                   struct perf_stat_output_ctx *out)
 488 {
 489         double total, ratio = 0.0;
 490         const char *color;
 491         int ctx = evsel_context(evsel);
 492
 493         total = avg_stats(&runtime_ll_cache_stats[ctx][cpu]);
 494
 495         if (total)
 496                 ratio = avg / total * 100.0;
 497
 498         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 499         out->print_metric(out->ctx, color, "%7.2f%%", "of all LL-cache hits", ratio);
 500 }
 501
 502 /*
 503  * High level "TopDown" CPU core pipe line bottleneck break down.
 504  *
 505  * Basic concept following
 506  * Yasin, A Top Down Method for Performance analysis and Counter architecture
 507  * ISPASS14
 508  *
 509  * The CPU pipeline is divided into 4 areas that can be bottlenecks:
 510  *
 511  * Frontend -> Backend -> Retiring
 512  * BadSpeculation in addition means out of order execution that is thrown away
 513  * (for example branch mispredictions)
 514  * Frontend is instruction decoding.
 515  * Backend is execution, like computation and accessing data in memory
 516  * Retiring is good execution that is not directly bottlenecked
 517  *
 518  * The formulas are computed in slots.
 519  * A slot is an entry in the pipeline each for the pipeline width
 520  * (for example a 4-wide pipeline has 4 slots for each cycle)
 521  *
 522  * Formulas:
 523  * BadSpeculation = ((SlotsIssued - SlotsRetired) + RecoveryBubbles) /
 524  *                      TotalSlots
 525  * Retiring = SlotsRetired / TotalSlots
 526  * FrontendBound = FetchBubbles / TotalSlots
 527  * BackendBound = 1.0 - BadSpeculation - Retiring - FrontendBound
 528  *
 529  * The kernel provides the mapping to the low level CPU events and any scaling
 530  * needed for the CPU pipeline width, for example:
 531  *
 532  * TotalSlots = Cycles * 4
 533  *
 534  * The scaling factor is communicated in the sysfs unit.
 535  *
 536  * In some cases the CPU may not be able to measure all the formulas due to
 537  * missing events. In this case multiple formulas are combined, as possible.
 538  *
 539  * Full TopDown supports more levels to sub-divide each area: for example
 540  * BackendBound into computing bound and memory bound. For now we only
 541  * support Level 1 TopDown.
 542  */
 543
 544 static double sanitize_val(double x)
 545 {
 546         if (x < 0 && x >= -0.02)
 547                 return 0.0;
 548         return x;
 549 }
 550
 551 static double td_total_slots(int ctx, int cpu)
 552 {
 553         return avg_stats(&runtime_topdown_total_slots[ctx][cpu]);
 554 }
 555
 556 static double td_bad_spec(int ctx, int cpu)
 557 {
 558         double bad_spec = 0;
 559         double total_slots;
 560         double total;
 561
 562         total = avg_stats(&runtime_topdown_slots_issued[ctx][cpu]) -
 563                 avg_stats(&runtime_topdown_slots_retired[ctx][cpu]) +
 564                 avg_stats(&runtime_topdown_recovery_bubbles[ctx][cpu]);
 565         total_slots = td_total_slots(ctx, cpu);
 566         if (total_slots)
 567                 bad_spec = total / total_slots;
 568         return sanitize_val(bad_spec);
 569 }
 570
 571 static double td_retiring(int ctx, int cpu)
 572 {
 573         double retiring = 0;
 574         double total_slots = td_total_slots(ctx, cpu);
 575         double ret_slots = avg_stats(&runtime_topdown_slots_retired[ctx][cpu]);
 576
 577         if (total_slots)
 578                 retiring = ret_slots / total_slots;
 579         return retiring;
 580 }
 581
 582 static double td_fe_bound(int ctx, int cpu)
 583 {
 584         double fe_bound = 0;
 585         double total_slots = td_total_slots(ctx, cpu);
 586         double fetch_bub = avg_stats(&runtime_topdown_fetch_bubbles[ctx][cpu]);
 587
 588         if (total_slots)
 589                 fe_bound = fetch_bub / total_slots;
 590         return fe_bound;
 591 }
 592
 593 static double td_be_bound(int ctx, int cpu)
 594 {
 595         double sum = (td_fe_bound(ctx, cpu) +
 596                       td_bad_spec(ctx, cpu) +
 597                       td_retiring(ctx, cpu));
 598         if (sum == 0)
 599                 return 0;
 600         return sanitize_val(1.0 - sum);
 601 }
 602
 603 static void print_smi_cost(int cpu, struct perf_evsel *evsel,
 604                            struct perf_stat_output_ctx *out)
 605 {
 606         double smi_num, aperf, cycles, cost = 0.0;
 607         int ctx = evsel_context(evsel);
 608         const char *color = NULL;
 609
 610         smi_num = avg_stats(&runtime_smi_num_stats[ctx][cpu]);
 611         aperf = avg_stats(&runtime_aperf_stats[ctx][cpu]);
 612         cycles = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 613
 614         if ((cycles == 0) || (aperf == 0))
 615                 return;
 616
 617         if (smi_num)
 618                 cost = (aperf - cycles) / aperf * 100.00;
 619
 620         if (cost > 10)
 621                 color = PERF_COLOR_RED;
 622         out->print_metric(out->ctx, color, "%8.1f%%", "SMI cycles%", cost);
 623         out->print_metric(out->ctx, NULL, "%4.0f", "SMI#", smi_num);
 624 }
 625
 626 void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
 627                                    double avg, int cpu,
 628                                    struct perf_stat_output_ctx *out)
 629 {
 630         void *ctxp = out->ctx;
 631         print_metric_t print_metric = out->print_metric;
 632         double total, ratio = 0.0, total2;
 633         const char *color = NULL;
 634         int ctx = evsel_context(evsel);
 635
 636         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 637                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 638                 if (total) {
 639                         ratio = avg / total;
 640                         print_metric(ctxp, NULL, "%7.2f ",
 641                                         "insn per cycle", ratio);
 642                 } else {
 643                         print_metric(ctxp, NULL, NULL, "insn per cycle", 0);
 644                 }
 645                 total = avg_stats(&runtime_stalled_cycles_front_stats[ctx][cpu]);
 646                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[ctx][cpu]));
 647
 648                 if (total && avg) {
 649                         out->new_line(ctxp);
 650                         ratio = total / avg;
 651                         print_metric(ctxp, NULL, "%7.2f ",
 652                                         "stalled cycles per insn",
 653                                         ratio);
 654                 } else if (have_frontend_stalled) {
 655                         print_metric(ctxp, NULL, NULL,
 656                                      "stalled cycles per insn", 0);
 657                 }
 658         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES)) {
 659                 if (runtime_branches_stats[ctx][cpu].n != 0)
 660                         print_branch_misses(cpu, evsel, avg, out);
 661                 else
 662                         print_metric(ctxp, NULL, NULL, "of all branches", 0);
 663         } else if (
 664                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 665                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 666                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 667                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 668                 if (runtime_l1_dcache_stats[ctx][cpu].n != 0)
 669                         print_l1_dcache_misses(cpu, evsel, avg, out);
 670                 else
 671                         print_metric(ctxp, NULL, NULL, "of all L1-dcache hits", 0);
 672         } else if (
 673                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 674                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 675                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 676                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 677                 if (runtime_l1_icache_stats[ctx][cpu].n != 0)
 678                         print_l1_icache_misses(cpu, evsel, avg, out);
 679                 else
 680                         print_metric(ctxp, NULL, NULL, "of all L1-icache hits", 0);
 681         } else if (
 682                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 683                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 684                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 685                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 686                 if (runtime_dtlb_cache_stats[ctx][cpu].n != 0)
 687                         print_dtlb_cache_misses(cpu, evsel, avg, out);
 688                 else
 689                         print_metric(ctxp, NULL, NULL, "of all dTLB cache hits", 0);
 690         } else if (
 691                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 692                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 693                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 694                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 695                 if (runtime_itlb_cache_stats[ctx][cpu].n != 0)
 696                         print_itlb_cache_misses(cpu, evsel, avg, out);
 697                 else
 698                         print_metric(ctxp, NULL, NULL, "of all iTLB cache hits", 0);
 699         } else if (
 700                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 701                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 702                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 703                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 704                 if (runtime_ll_cache_stats[ctx][cpu].n != 0)
 705                         print_ll_cache_misses(cpu, evsel, avg, out);
 706                 else
 707                         print_metric(ctxp, NULL, NULL, "of all LL-cache hits", 0);
 708         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) {
 709                 total = avg_stats(&runtime_cacherefs_stats[ctx][cpu]);
 710
 711                 if (total)
 712                         ratio = avg * 100 / total;
 713
 714                 if (runtime_cacherefs_stats[ctx][cpu].n != 0)
 715                         print_metric(ctxp, NULL, "%8.3f %%",
 716                                      "of all cache refs", ratio);
 717                 else
 718                         print_metric(ctxp, NULL, NULL, "of all cache refs", 0);
 719         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 720                 print_stalled_cycles_frontend(cpu, evsel, avg, out);
 721         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 722                 print_stalled_cycles_backend(cpu, evsel, avg, out);
 723         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 724                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 725
 726                 if (total) {
 727                         ratio = avg / total;
 728                         print_metric(ctxp, NULL, "%8.3f", "GHz", ratio);
 729                 } else {
 730                         print_metric(ctxp, NULL, NULL, "Ghz", 0);
 731                 }
 732         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX)) {
 733                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 734                 if (total)
 735                         print_metric(ctxp, NULL,
 736                                         "%7.2f%%", "transactional cycles",
 737                                         100.0 * (avg / total));
 738                 else
 739                         print_metric(ctxp, NULL, NULL, "transactional cycles",
 740                                      0);
 741         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX_CP)) {
 742                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 743                 total2 = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 744                 if (total2 < avg)
 745                         total2 = avg;
 746                 if (total)
 747                         print_metric(ctxp, NULL, "%7.2f%%", "aborted cycles",
 748                                 100.0 * ((total2-avg) / total));
 749                 else
 750                         print_metric(ctxp, NULL, NULL, "aborted cycles", 0);
 751         } else if (perf_stat_evsel__is(evsel, TRANSACTION_START)) {
 752                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 753
 754                 if (avg)
 755                         ratio = total / avg;
 756
 757                 if (runtime_cycles_in_tx_stats[ctx][cpu].n != 0)
 758                         print_metric(ctxp, NULL, "%8.0f",
 759                                      "cycles / transaction", ratio);
 760                 else
 761                         print_metric(ctxp, NULL, NULL, "cycles / transaction",
 762                                      0);
 763         } else if (perf_stat_evsel__is(evsel, ELISION_START)) {
 764                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 765
 766                 if (avg)
 767                         ratio = total / avg;
 768
 769                 print_metric(ctxp, NULL, "%8.0f", "cycles / elision", ratio);
 770         } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK) ||
 771                    perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK)) {
 772                 if ((ratio = avg_stats(&walltime_nsecs_stats)) != 0)
 773                         print_metric(ctxp, NULL, "%8.3f", "CPUs utilized",
 774                                      avg / ratio);
 775                 else
 776                         print_metric(ctxp, NULL, NULL, "CPUs utilized", 0);
 777         } else if (perf_stat_evsel__is(evsel, TOPDOWN_FETCH_BUBBLES)) {
 778                 double fe_bound = td_fe_bound(ctx, cpu);
 779
 780                 if (fe_bound > 0.2)
 781                         color = PERF_COLOR_RED;
 782                 print_metric(ctxp, color, "%8.1f%%", "frontend bound",
 783                                 fe_bound * 100.);
 784         } else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_RETIRED)) {
 785                 double retiring = td_retiring(ctx, cpu);
 786
 787                 if (retiring > 0.7)
 788                         color = PERF_COLOR_GREEN;
 789                 print_metric(ctxp, color, "%8.1f%%", "retiring",
 790                                 retiring * 100.);
 791         } else if (perf_stat_evsel__is(evsel, TOPDOWN_RECOVERY_BUBBLES)) {
 792                 double bad_spec = td_bad_spec(ctx, cpu);
 793
 794                 if (bad_spec > 0.1)
 795                         color = PERF_COLOR_RED;
 796                 print_metric(ctxp, color, "%8.1f%%", "bad speculation",
 797                                 bad_spec * 100.);
 798         } else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_ISSUED)) {
 799                 double be_bound = td_be_bound(ctx, cpu);
 800                 const char *name = "backend bound";
 801                 static int have_recovery_bubbles = -1;
 802
 803                 /* In case the CPU does not support topdown-recovery-bubbles */
 804                 if (have_recovery_bubbles < 0)
 805                         have_recovery_bubbles = pmu_have_event("cpu",
 806                                         "topdown-recovery-bubbles");
 807                 if (!have_recovery_bubbles)
 808                         name = "backend bound/bad spec";
 809
 810                 if (be_bound > 0.2)
 811                         color = PERF_COLOR_RED;
 812                 if (td_total_slots(ctx, cpu) > 0)
 813                         print_metric(ctxp, color, "%8.1f%%", name,
 814                                         be_bound * 100.);
 815                 else
 816                         print_metric(ctxp, NULL, NULL, name, 0);
 817         } else if (evsel->metric_expr) {
 818                 struct parse_ctx pctx;
 819                 int i;
 820
 821                 expr__ctx_init(&pctx);
 822                 expr__add_id(&pctx, evsel->name, avg);
 823                 for (i = 0; evsel->metric_events[i]; i++) {
 824                         struct saved_value *v;
 825
 826                         v = saved_value_lookup(evsel->metric_events[i], cpu, ctx, false);
 827                         if (!v)
 828                                 break;
 829                         expr__add_id(&pctx, evsel->metric_events[i]->name,
 830                                              avg_stats(&v->stats));
 831                 }
 832                 if (!evsel->metric_events[i]) {
 833                         const char *p = evsel->metric_expr;
 834
 835                         if (expr__parse(&ratio, &pctx, &p) == 0)
 836                                 print_metric(ctxp, NULL, "%8.1f",
 837                                         evsel->metric_name ?
 838                                         evsel->metric_name :
 839                                         out->force_header ?  evsel->name : "",
 840                                         ratio);
 841                         else
 842                                 print_metric(ctxp, NULL, NULL, "", 0);
 843                 } else
 844                         print_metric(ctxp, NULL, NULL, "", 0);
 845         } else if (runtime_nsecs_stats[cpu].n != 0) {
 846                 char unit = 'M';
 847                 char unit_buf[10];
 848
 849                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 850
 851                 if (total)
 852                         ratio = 1000.0 * avg / total;
 853                 if (ratio < 0.001) {
 854                         ratio *= 1000;
 855                         unit = 'K';
 856                 }
 857                 snprintf(unit_buf, sizeof(unit_buf), "%c/sec", unit);
 858                 print_metric(ctxp, NULL, "%8.3f", unit_buf, ratio);
 859         } else if (perf_stat_evsel__is(evsel, SMI_NUM)) {
 860                 print_smi_cost(cpu, evsel, out);
 861         } else {
 862                 print_metric(ctxp, NULL, NULL, NULL, 0);
 863         }
 864 }