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
   7 enum {
   8         CTX_BIT_USER    = 1 << 0,
   9         CTX_BIT_KERNEL  = 1 << 1,
  10         CTX_BIT_HV      = 1 << 2,
  11         CTX_BIT_HOST    = 1 << 3,
  12         CTX_BIT_IDLE    = 1 << 4,
  13         CTX_BIT_MAX     = 1 << 5,
  14 };
  15
  16 #define NUM_CTX CTX_BIT_MAX
  17
  18 /*
  19  * AGGR_GLOBAL: Use CPU 0
  20  * AGGR_SOCKET: Use first CPU of socket
  21  * AGGR_CORE: Use first CPU of core
  22  * AGGR_NONE: Use matching CPU
  23  * AGGR_THREAD: Not supported?
  24  */
  25 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
  26 static struct stats runtime_cycles_stats[NUM_CTX][MAX_NR_CPUS];
  27 static struct stats runtime_stalled_cycles_front_stats[NUM_CTX][MAX_NR_CPUS];
  28 static struct stats runtime_stalled_cycles_back_stats[NUM_CTX][MAX_NR_CPUS];
  29 static struct stats runtime_branches_stats[NUM_CTX][MAX_NR_CPUS];
  30 static struct stats runtime_cacherefs_stats[NUM_CTX][MAX_NR_CPUS];
  31 static struct stats runtime_l1_dcache_stats[NUM_CTX][MAX_NR_CPUS];
  32 static struct stats runtime_l1_icache_stats[NUM_CTX][MAX_NR_CPUS];
  33 static struct stats runtime_ll_cache_stats[NUM_CTX][MAX_NR_CPUS];
  34 static struct stats runtime_itlb_cache_stats[NUM_CTX][MAX_NR_CPUS];
  35 static struct stats runtime_dtlb_cache_stats[NUM_CTX][MAX_NR_CPUS];
  36 static struct stats runtime_cycles_in_tx_stats[NUM_CTX][MAX_NR_CPUS];
  37 static struct stats runtime_transaction_stats[NUM_CTX][MAX_NR_CPUS];
  38 static struct stats runtime_elision_stats[NUM_CTX][MAX_NR_CPUS];
  39 static bool have_frontend_stalled;
  40
  41 struct stats walltime_nsecs_stats;
  42
  43 void perf_stat__init_shadow_stats(void)
  44 {
  45         have_frontend_stalled = pmu_have_event("cpu", "stalled-cycles-frontend");
  46 }
  47
  48 static int evsel_context(struct perf_evsel *evsel)
  49 {
  50         int ctx = 0;
  51
  52         if (evsel->attr.exclude_kernel)
  53                 ctx |= CTX_BIT_KERNEL;
  54         if (evsel->attr.exclude_user)
  55                 ctx |= CTX_BIT_USER;
  56         if (evsel->attr.exclude_hv)
  57                 ctx |= CTX_BIT_HV;
  58         if (evsel->attr.exclude_host)
  59                 ctx |= CTX_BIT_HOST;
  60         if (evsel->attr.exclude_idle)
  61                 ctx |= CTX_BIT_IDLE;
  62
  63         return ctx;
  64 }
  65
  66 void perf_stat__reset_shadow_stats(void)
  67 {
  68         memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
  69         memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
  70         memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
  71         memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
  72         memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
  73         memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
  74         memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
  75         memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
  76         memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
  77         memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
  78         memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
  79         memset(runtime_cycles_in_tx_stats, 0,
  80                         sizeof(runtime_cycles_in_tx_stats));
  81         memset(runtime_transaction_stats, 0,
  82                 sizeof(runtime_transaction_stats));
  83         memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
  84         memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
  85 }
  86
  87 /*
  88  * Update various tracking values we maintain to print
  89  * more semantic information such as miss/hit ratios,
  90  * instruction rates, etc:
  91  */
  92 void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
  93                                     int cpu)
  94 {
  95         int ctx = evsel_context(counter);
  96
  97         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
  98                 update_stats(&runtime_nsecs_stats[cpu], count[0]);
  99         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 100                 update_stats(&runtime_cycles_stats[ctx][cpu], count[0]);
 101         else if (perf_stat_evsel__is(counter, CYCLES_IN_TX))
 102                 update_stats(&runtime_cycles_in_tx_stats[ctx][cpu], count[0]);
 103         else if (perf_stat_evsel__is(counter, TRANSACTION_START))
 104                 update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
 105         else if (perf_stat_evsel__is(counter, ELISION_START))
 106                 update_stats(&runtime_elision_stats[ctx][cpu], count[0]);
 107         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 108                 update_stats(&runtime_stalled_cycles_front_stats[ctx][cpu], count[0]);
 109         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 110                 update_stats(&runtime_stalled_cycles_back_stats[ctx][cpu], count[0]);
 111         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 112                 update_stats(&runtime_branches_stats[ctx][cpu], count[0]);
 113         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 114                 update_stats(&runtime_cacherefs_stats[ctx][cpu], count[0]);
 115         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 116                 update_stats(&runtime_l1_dcache_stats[ctx][cpu], count[0]);
 117         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 118                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 119         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 120                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 121         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 122                 update_stats(&runtime_dtlb_cache_stats[ctx][cpu], count[0]);
 123         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 124                 update_stats(&runtime_itlb_cache_stats[ctx][cpu], count[0]);
 125 }
 126
 127 /* used for get_ratio_color() */
 128 enum grc_type {
 129         GRC_STALLED_CYCLES_FE,
 130         GRC_STALLED_CYCLES_BE,
 131         GRC_CACHE_MISSES,
 132         GRC_MAX_NR
 133 };
 134
 135 static const char *get_ratio_color(enum grc_type type, double ratio)
 136 {
 137         static const double grc_table[GRC_MAX_NR][3] = {
 138                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 139                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 140                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 141         };
 142         const char *color = PERF_COLOR_NORMAL;
 143
 144         if (ratio > grc_table[type][0])
 145                 color = PERF_COLOR_RED;
 146         else if (ratio > grc_table[type][1])
 147                 color = PERF_COLOR_MAGENTA;
 148         else if (ratio > grc_table[type][2])
 149                 color = PERF_COLOR_YELLOW;
 150
 151         return color;
 152 }
 153
 154 static void print_stalled_cycles_frontend(int cpu,
 155                                           struct perf_evsel *evsel
 156                                           __maybe_unused, double avg,
 157                                           struct perf_stat_output_ctx *out)
 158 {
 159         double total, ratio = 0.0;
 160         const char *color;
 161         int ctx = evsel_context(evsel);
 162
 163         total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 164
 165         if (total)
 166                 ratio = avg / total * 100.0;
 167
 168         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 169
 170         if (ratio)
 171                 out->print_metric(out->ctx, color, "%7.2f%%", "frontend cycles idle",
 172                                   ratio);
 173         else
 174                 out->print_metric(out->ctx, NULL, NULL, "frontend cycles idle", 0);
 175 }
 176
 177 static void print_stalled_cycles_backend(int cpu,
 178                                          struct perf_evsel *evsel
 179                                          __maybe_unused, double avg,
 180                                          struct perf_stat_output_ctx *out)
 181 {
 182         double total, ratio = 0.0;
 183         const char *color;
 184         int ctx = evsel_context(evsel);
 185
 186         total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 187
 188         if (total)
 189                 ratio = avg / total * 100.0;
 190
 191         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 192
 193         out->print_metric(out->ctx, color, "%6.2f%%", "backend cycles idle", ratio);
 194 }
 195
 196 static void print_branch_misses(int cpu,
 197                                 struct perf_evsel *evsel __maybe_unused,
 198                                 double avg,
 199                                 struct perf_stat_output_ctx *out)
 200 {
 201         double total, ratio = 0.0;
 202         const char *color;
 203         int ctx = evsel_context(evsel);
 204
 205         total = avg_stats(&runtime_branches_stats[ctx][cpu]);
 206
 207         if (total)
 208                 ratio = avg / total * 100.0;
 209
 210         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 211
 212         out->print_metric(out->ctx, color, "%7.2f%%", "of all branches", ratio);
 213 }
 214
 215 static void print_l1_dcache_misses(int cpu,
 216                                    struct perf_evsel *evsel __maybe_unused,
 217                                    double avg,
 218                                    struct perf_stat_output_ctx *out)
 219 {
 220         double total, ratio = 0.0;
 221         const char *color;
 222         int ctx = evsel_context(evsel);
 223
 224         total = avg_stats(&runtime_l1_dcache_stats[ctx][cpu]);
 225
 226         if (total)
 227                 ratio = avg / total * 100.0;
 228
 229         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 230
 231         out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-dcache hits", ratio);
 232 }
 233
 234 static void print_l1_icache_misses(int cpu,
 235                                    struct perf_evsel *evsel __maybe_unused,
 236                                    double avg,
 237                                    struct perf_stat_output_ctx *out)
 238 {
 239         double total, ratio = 0.0;
 240         const char *color;
 241         int ctx = evsel_context(evsel);
 242
 243         total = avg_stats(&runtime_l1_icache_stats[ctx][cpu]);
 244
 245         if (total)
 246                 ratio = avg / total * 100.0;
 247
 248         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 249         out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-icache hits", ratio);
 250 }
 251
 252 static void print_dtlb_cache_misses(int cpu,
 253                                     struct perf_evsel *evsel __maybe_unused,
 254                                     double avg,
 255                                     struct perf_stat_output_ctx *out)
 256 {
 257         double total, ratio = 0.0;
 258         const char *color;
 259         int ctx = evsel_context(evsel);
 260
 261         total = avg_stats(&runtime_dtlb_cache_stats[ctx][cpu]);
 262
 263         if (total)
 264                 ratio = avg / total * 100.0;
 265
 266         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 267         out->print_metric(out->ctx, color, "%7.2f%%", "of all dTLB cache hits", ratio);
 268 }
 269
 270 static void print_itlb_cache_misses(int cpu,
 271                                     struct perf_evsel *evsel __maybe_unused,
 272                                     double avg,
 273                                     struct perf_stat_output_ctx *out)
 274 {
 275         double total, ratio = 0.0;
 276         const char *color;
 277         int ctx = evsel_context(evsel);
 278
 279         total = avg_stats(&runtime_itlb_cache_stats[ctx][cpu]);
 280
 281         if (total)
 282                 ratio = avg / total * 100.0;
 283
 284         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 285         out->print_metric(out->ctx, color, "%7.2f%%", "of all iTLB cache hits", ratio);
 286 }
 287
 288 static void print_ll_cache_misses(int cpu,
 289                                   struct perf_evsel *evsel __maybe_unused,
 290                                   double avg,
 291                                   struct perf_stat_output_ctx *out)
 292 {
 293         double total, ratio = 0.0;
 294         const char *color;
 295         int ctx = evsel_context(evsel);
 296
 297         total = avg_stats(&runtime_ll_cache_stats[ctx][cpu]);
 298
 299         if (total)
 300                 ratio = avg / total * 100.0;
 301
 302         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 303         out->print_metric(out->ctx, color, "%7.2f%%", "of all LL-cache hits", ratio);
 304 }
 305
 306 void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
 307                                    double avg, int cpu,
 308                                    struct perf_stat_output_ctx *out)
 309 {
 310         void *ctxp = out->ctx;
 311         print_metric_t print_metric = out->print_metric;
 312         double total, ratio = 0.0, total2;
 313         int ctx = evsel_context(evsel);
 314
 315         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 316                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 317                 if (total) {
 318                         ratio = avg / total;
 319                         print_metric(ctxp, NULL, "%7.2f ",
 320                                         "insn per cycle", ratio);
 321                 } else {
 322                         print_metric(ctxp, NULL, NULL, "insn per cycle", 0);
 323                 }
 324                 total = avg_stats(&runtime_stalled_cycles_front_stats[ctx][cpu]);
 325                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[ctx][cpu]));
 326
 327                 if (total && avg) {
 328                         out->new_line(ctxp);
 329                         ratio = total / avg;
 330                         print_metric(ctxp, NULL, "%7.2f ",
 331                                         "stalled cycles per insn",
 332                                         ratio);
 333                 } else if (have_frontend_stalled) {
 334                         print_metric(ctxp, NULL, NULL,
 335                                      "stalled cycles per insn", 0);
 336                 }
 337         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES)) {
 338                 if (runtime_branches_stats[ctx][cpu].n != 0)
 339                         print_branch_misses(cpu, evsel, avg, out);
 340                 else
 341                         print_metric(ctxp, NULL, NULL, "of all branches", 0);
 342         } else if (
 343                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 344                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 345                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 346                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 347                 if (runtime_l1_dcache_stats[ctx][cpu].n != 0)
 348                         print_l1_dcache_misses(cpu, evsel, avg, out);
 349                 else
 350                         print_metric(ctxp, NULL, NULL, "of all L1-dcache hits", 0);
 351         } else if (
 352                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 353                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 354                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 355                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 356                 if (runtime_l1_icache_stats[ctx][cpu].n != 0)
 357                         print_l1_icache_misses(cpu, evsel, avg, out);
 358                 else
 359                         print_metric(ctxp, NULL, NULL, "of all L1-icache hits", 0);
 360         } else if (
 361                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 362                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 363                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 364                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 365                 if (runtime_dtlb_cache_stats[ctx][cpu].n != 0)
 366                         print_dtlb_cache_misses(cpu, evsel, avg, out);
 367                 else
 368                         print_metric(ctxp, NULL, NULL, "of all dTLB cache hits", 0);
 369         } else if (
 370                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 371                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 372                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 373                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 374                 if (runtime_itlb_cache_stats[ctx][cpu].n != 0)
 375                         print_itlb_cache_misses(cpu, evsel, avg, out);
 376                 else
 377                         print_metric(ctxp, NULL, NULL, "of all iTLB cache hits", 0);
 378         } else if (
 379                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 380                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 381                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 382                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 383                 if (runtime_ll_cache_stats[ctx][cpu].n != 0)
 384                         print_ll_cache_misses(cpu, evsel, avg, out);
 385                 else
 386                         print_metric(ctxp, NULL, NULL, "of all LL-cache hits", 0);
 387         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) {
 388                 total = avg_stats(&runtime_cacherefs_stats[ctx][cpu]);
 389
 390                 if (total)
 391                         ratio = avg * 100 / total;
 392
 393                 if (runtime_cacherefs_stats[ctx][cpu].n != 0)
 394                         print_metric(ctxp, NULL, "%8.3f %%",
 395                                      "of all cache refs", ratio);
 396                 else
 397                         print_metric(ctxp, NULL, NULL, "of all cache refs", 0);
 398         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 399                 print_stalled_cycles_frontend(cpu, evsel, avg, out);
 400         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 401                 print_stalled_cycles_backend(cpu, evsel, avg, out);
 402         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 403                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 404
 405                 if (total) {
 406                         ratio = avg / total;
 407                         print_metric(ctxp, NULL, "%8.3f", "GHz", ratio);
 408                 } else {
 409                         print_metric(ctxp, NULL, NULL, "Ghz", 0);
 410                 }
 411         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX)) {
 412                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 413                 if (total)
 414                         print_metric(ctxp, NULL,
 415                                         "%7.2f%%", "transactional cycles",
 416                                         100.0 * (avg / total));
 417                 else
 418                         print_metric(ctxp, NULL, NULL, "transactional cycles",
 419                                      0);
 420         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX_CP)) {
 421                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 422                 total2 = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 423                 if (total2 < avg)
 424                         total2 = avg;
 425                 if (total)
 426                         print_metric(ctxp, NULL, "%7.2f%%", "aborted cycles",
 427                                 100.0 * ((total2-avg) / total));
 428                 else
 429                         print_metric(ctxp, NULL, NULL, "aborted cycles", 0);
 430         } else if (perf_stat_evsel__is(evsel, TRANSACTION_START)) {
 431                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 432
 433                 if (avg)
 434                         ratio = total / avg;
 435
 436                 if (runtime_cycles_in_tx_stats[ctx][cpu].n != 0)
 437                         print_metric(ctxp, NULL, "%8.0f",
 438                                      "cycles / transaction", ratio);
 439                 else
 440                         print_metric(ctxp, NULL, NULL, "cycles / transaction",
 441                                      0);
 442         } else if (perf_stat_evsel__is(evsel, ELISION_START)) {
 443                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 444
 445                 if (avg)
 446                         ratio = total / avg;
 447
 448                 print_metric(ctxp, NULL, "%8.0f", "cycles / elision", ratio);
 449         } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) {
 450                 if ((ratio = avg_stats(&walltime_nsecs_stats)) != 0)
 451                         print_metric(ctxp, NULL, "%8.3f", "CPUs utilized",
 452                                      avg / ratio);
 453                 else
 454                         print_metric(ctxp, NULL, NULL, "CPUs utilized", 0);
 455         } else if (runtime_nsecs_stats[cpu].n != 0) {
 456                 char unit = 'M';
 457                 char unit_buf[10];
 458
 459                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 460
 461                 if (total)
 462                         ratio = 1000.0 * avg / total;
 463                 if (ratio < 0.001) {
 464                         ratio *= 1000;
 465                         unit = 'K';
 466                 }
 467                 snprintf(unit_buf, sizeof(unit_buf), "%c/sec", unit);
 468                 print_metric(ctxp, NULL, "%8.3f", unit_buf, ratio);
 469         } else {
 470                 print_metric(ctxp, NULL, NULL, NULL, 0);
 471         }
 472 }