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             perf_evsel__match(counter, SOFTWARE, SW_CPU_CLOCK))
  99                 update_stats(&runtime_nsecs_stats[cpu], count[0]);
 100         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 101                 update_stats(&runtime_cycles_stats[ctx][cpu], count[0]);
 102         else if (perf_stat_evsel__is(counter, CYCLES_IN_TX))
 103                 update_stats(&runtime_cycles_in_tx_stats[ctx][cpu], count[0]);
 104         else if (perf_stat_evsel__is(counter, TRANSACTION_START))
 105                 update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
 106         else if (perf_stat_evsel__is(counter, ELISION_START))
 107                 update_stats(&runtime_elision_stats[ctx][cpu], count[0]);
 108         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 109                 update_stats(&runtime_stalled_cycles_front_stats[ctx][cpu], count[0]);
 110         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 111                 update_stats(&runtime_stalled_cycles_back_stats[ctx][cpu], count[0]);
 112         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 113                 update_stats(&runtime_branches_stats[ctx][cpu], count[0]);
 114         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 115                 update_stats(&runtime_cacherefs_stats[ctx][cpu], count[0]);
 116         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 117                 update_stats(&runtime_l1_dcache_stats[ctx][cpu], count[0]);
 118         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 119                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 120         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 121                 update_stats(&runtime_ll_cache_stats[ctx][cpu], count[0]);
 122         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 123                 update_stats(&runtime_dtlb_cache_stats[ctx][cpu], count[0]);
 124         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 125                 update_stats(&runtime_itlb_cache_stats[ctx][cpu], count[0]);
 126 }
 127
 128 /* used for get_ratio_color() */
 129 enum grc_type {
 130         GRC_STALLED_CYCLES_FE,
 131         GRC_STALLED_CYCLES_BE,
 132         GRC_CACHE_MISSES,
 133         GRC_MAX_NR
 134 };
 135
 136 static const char *get_ratio_color(enum grc_type type, double ratio)
 137 {
 138         static const double grc_table[GRC_MAX_NR][3] = {
 139                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 140                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 141                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 142         };
 143         const char *color = PERF_COLOR_NORMAL;
 144
 145         if (ratio > grc_table[type][0])
 146                 color = PERF_COLOR_RED;
 147         else if (ratio > grc_table[type][1])
 148                 color = PERF_COLOR_MAGENTA;
 149         else if (ratio > grc_table[type][2])
 150                 color = PERF_COLOR_YELLOW;
 151
 152         return color;
 153 }
 154
 155 static void print_stalled_cycles_frontend(int cpu,
 156                                           struct perf_evsel *evsel, 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, double avg,
 179                                          struct perf_stat_output_ctx *out)
 180 {
 181         double total, ratio = 0.0;
 182         const char *color;
 183         int ctx = evsel_context(evsel);
 184
 185         total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 186
 187         if (total)
 188                 ratio = avg / total * 100.0;
 189
 190         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 191
 192         out->print_metric(out->ctx, color, "%7.2f%%", "backend cycles idle", ratio);
 193 }
 194
 195 static void print_branch_misses(int cpu,
 196                                 struct perf_evsel *evsel,
 197                                 double avg,
 198                                 struct perf_stat_output_ctx *out)
 199 {
 200         double total, ratio = 0.0;
 201         const char *color;
 202         int ctx = evsel_context(evsel);
 203
 204         total = avg_stats(&runtime_branches_stats[ctx][cpu]);
 205
 206         if (total)
 207                 ratio = avg / total * 100.0;
 208
 209         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 210
 211         out->print_metric(out->ctx, color, "%7.2f%%", "of all branches", ratio);
 212 }
 213
 214 static void print_l1_dcache_misses(int cpu,
 215                                    struct perf_evsel *evsel,
 216                                    double avg,
 217                                    struct perf_stat_output_ctx *out)
 218 {
 219         double total, ratio = 0.0;
 220         const char *color;
 221         int ctx = evsel_context(evsel);
 222
 223         total = avg_stats(&runtime_l1_dcache_stats[ctx][cpu]);
 224
 225         if (total)
 226                 ratio = avg / total * 100.0;
 227
 228         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 229
 230         out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-dcache hits", ratio);
 231 }
 232
 233 static void print_l1_icache_misses(int cpu,
 234                                    struct perf_evsel *evsel,
 235                                    double avg,
 236                                    struct perf_stat_output_ctx *out)
 237 {
 238         double total, ratio = 0.0;
 239         const char *color;
 240         int ctx = evsel_context(evsel);
 241
 242         total = avg_stats(&runtime_l1_icache_stats[ctx][cpu]);
 243
 244         if (total)
 245                 ratio = avg / total * 100.0;
 246
 247         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 248         out->print_metric(out->ctx, color, "%7.2f%%", "of all L1-icache hits", ratio);
 249 }
 250
 251 static void print_dtlb_cache_misses(int cpu,
 252                                     struct perf_evsel *evsel,
 253                                     double avg,
 254                                     struct perf_stat_output_ctx *out)
 255 {
 256         double total, ratio = 0.0;
 257         const char *color;
 258         int ctx = evsel_context(evsel);
 259
 260         total = avg_stats(&runtime_dtlb_cache_stats[ctx][cpu]);
 261
 262         if (total)
 263                 ratio = avg / total * 100.0;
 264
 265         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 266         out->print_metric(out->ctx, color, "%7.2f%%", "of all dTLB cache hits", ratio);
 267 }
 268
 269 static void print_itlb_cache_misses(int cpu,
 270                                     struct perf_evsel *evsel,
 271                                     double avg,
 272                                     struct perf_stat_output_ctx *out)
 273 {
 274         double total, ratio = 0.0;
 275         const char *color;
 276         int ctx = evsel_context(evsel);
 277
 278         total = avg_stats(&runtime_itlb_cache_stats[ctx][cpu]);
 279
 280         if (total)
 281                 ratio = avg / total * 100.0;
 282
 283         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 284         out->print_metric(out->ctx, color, "%7.2f%%", "of all iTLB cache hits", ratio);
 285 }
 286
 287 static void print_ll_cache_misses(int cpu,
 288                                   struct perf_evsel *evsel,
 289                                   double avg,
 290                                   struct perf_stat_output_ctx *out)
 291 {
 292         double total, ratio = 0.0;
 293         const char *color;
 294         int ctx = evsel_context(evsel);
 295
 296         total = avg_stats(&runtime_ll_cache_stats[ctx][cpu]);
 297
 298         if (total)
 299                 ratio = avg / total * 100.0;
 300
 301         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 302         out->print_metric(out->ctx, color, "%7.2f%%", "of all LL-cache hits", ratio);
 303 }
 304
 305 void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
 306                                    double avg, int cpu,
 307                                    struct perf_stat_output_ctx *out)
 308 {
 309         void *ctxp = out->ctx;
 310         print_metric_t print_metric = out->print_metric;
 311         double total, ratio = 0.0, total2;
 312         int ctx = evsel_context(evsel);
 313
 314         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 315                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 316                 if (total) {
 317                         ratio = avg / total;
 318                         print_metric(ctxp, NULL, "%7.2f ",
 319                                         "insn per cycle", ratio);
 320                 } else {
 321                         print_metric(ctxp, NULL, NULL, "insn per cycle", 0);
 322                 }
 323                 total = avg_stats(&runtime_stalled_cycles_front_stats[ctx][cpu]);
 324                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[ctx][cpu]));
 325
 326                 if (total && avg) {
 327                         out->new_line(ctxp);
 328                         ratio = total / avg;
 329                         print_metric(ctxp, NULL, "%7.2f ",
 330                                         "stalled cycles per insn",
 331                                         ratio);
 332                 } else if (have_frontend_stalled) {
 333                         print_metric(ctxp, NULL, NULL,
 334                                      "stalled cycles per insn", 0);
 335                 }
 336         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES)) {
 337                 if (runtime_branches_stats[ctx][cpu].n != 0)
 338                         print_branch_misses(cpu, evsel, avg, out);
 339                 else
 340                         print_metric(ctxp, NULL, NULL, "of all branches", 0);
 341         } else if (
 342                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 343                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
 344                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 345                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 346                 if (runtime_l1_dcache_stats[ctx][cpu].n != 0)
 347                         print_l1_dcache_misses(cpu, evsel, avg, out);
 348                 else
 349                         print_metric(ctxp, NULL, NULL, "of all L1-dcache hits", 0);
 350         } else if (
 351                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 352                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
 353                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 354                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 355                 if (runtime_l1_icache_stats[ctx][cpu].n != 0)
 356                         print_l1_icache_misses(cpu, evsel, avg, out);
 357                 else
 358                         print_metric(ctxp, NULL, NULL, "of all L1-icache hits", 0);
 359         } else if (
 360                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 361                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
 362                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 363                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 364                 if (runtime_dtlb_cache_stats[ctx][cpu].n != 0)
 365                         print_dtlb_cache_misses(cpu, evsel, avg, out);
 366                 else
 367                         print_metric(ctxp, NULL, NULL, "of all dTLB cache hits", 0);
 368         } else if (
 369                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 370                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
 371                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 372                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 373                 if (runtime_itlb_cache_stats[ctx][cpu].n != 0)
 374                         print_itlb_cache_misses(cpu, evsel, avg, out);
 375                 else
 376                         print_metric(ctxp, NULL, NULL, "of all iTLB cache hits", 0);
 377         } else if (
 378                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
 379                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
 380                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
 381                                          ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16))) {
 382                 if (runtime_ll_cache_stats[ctx][cpu].n != 0)
 383                         print_ll_cache_misses(cpu, evsel, avg, out);
 384                 else
 385                         print_metric(ctxp, NULL, NULL, "of all LL-cache hits", 0);
 386         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) {
 387                 total = avg_stats(&runtime_cacherefs_stats[ctx][cpu]);
 388
 389                 if (total)
 390                         ratio = avg * 100 / total;
 391
 392                 if (runtime_cacherefs_stats[ctx][cpu].n != 0)
 393                         print_metric(ctxp, NULL, "%8.3f %%",
 394                                      "of all cache refs", ratio);
 395                 else
 396                         print_metric(ctxp, NULL, NULL, "of all cache refs", 0);
 397         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 398                 print_stalled_cycles_frontend(cpu, evsel, avg, out);
 399         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
 400                 print_stalled_cycles_backend(cpu, evsel, avg, out);
 401         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
 402                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 403
 404                 if (total) {
 405                         ratio = avg / total;
 406                         print_metric(ctxp, NULL, "%8.3f", "GHz", ratio);
 407                 } else {
 408                         print_metric(ctxp, NULL, NULL, "Ghz", 0);
 409                 }
 410         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX)) {
 411                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 412                 if (total)
 413                         print_metric(ctxp, NULL,
 414                                         "%7.2f%%", "transactional cycles",
 415                                         100.0 * (avg / total));
 416                 else
 417                         print_metric(ctxp, NULL, NULL, "transactional cycles",
 418                                      0);
 419         } else if (perf_stat_evsel__is(evsel, CYCLES_IN_TX_CP)) {
 420                 total = avg_stats(&runtime_cycles_stats[ctx][cpu]);
 421                 total2 = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 422                 if (total2 < avg)
 423                         total2 = avg;
 424                 if (total)
 425                         print_metric(ctxp, NULL, "%7.2f%%", "aborted cycles",
 426                                 100.0 * ((total2-avg) / total));
 427                 else
 428                         print_metric(ctxp, NULL, NULL, "aborted cycles", 0);
 429         } else if (perf_stat_evsel__is(evsel, TRANSACTION_START)) {
 430                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 431
 432                 if (avg)
 433                         ratio = total / avg;
 434
 435                 if (runtime_cycles_in_tx_stats[ctx][cpu].n != 0)
 436                         print_metric(ctxp, NULL, "%8.0f",
 437                                      "cycles / transaction", ratio);
 438                 else
 439                         print_metric(ctxp, NULL, NULL, "cycles / transaction",
 440                                      0);
 441         } else if (perf_stat_evsel__is(evsel, ELISION_START)) {
 442                 total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 443
 444                 if (avg)
 445                         ratio = total / avg;
 446
 447                 print_metric(ctxp, NULL, "%8.0f", "cycles / elision", ratio);
 448         } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK) ||
 449                    perf_evsel__match(evsel, SOFTWARE, SW_CPU_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 }