1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2020 Facebook */ 3 #define _GNU_SOURCE 4 #include <argp.h> 5 #include <linux/compiler.h> 6 #include <sys/time.h> 7 #include <sched.h> 8 #include <fcntl.h> 9 #include <pthread.h> 10 #include <sys/sysinfo.h> 11 #include <signal.h> 12 #include "bench.h" 13 #include "testing_helpers.h" 14 15 struct env env = { 16 .warmup_sec = 1, 17 .duration_sec = 5, 18 .affinity = false, 19 .quiet = false, 20 .consumer_cnt = 1, 21 .producer_cnt = 1, 22 }; 23 24 static int libbpf_print_fn(enum libbpf_print_level level, 25 const char *format, va_list args) 26 { 27 if (level == LIBBPF_DEBUG && !env.verbose) 28 return 0; 29 return vfprintf(stderr, format, args); 30 } 31 32 void setup_libbpf(void) 33 { 34 libbpf_set_strict_mode(LIBBPF_STRICT_ALL); 35 libbpf_set_print(libbpf_print_fn); 36 } 37 38 void false_hits_report_progress(int iter, struct bench_res *res, long delta_ns) 39 { 40 long total = res->false_hits + res->hits + res->drops; 41 42 printf("Iter %3d (%7.3lfus): ", 43 iter, (delta_ns - 1000000000) / 1000.0); 44 45 printf("%ld false hits of %ld total operations. Percentage = %2.2f %%\n", 46 res->false_hits, total, ((float)res->false_hits / total) * 100); 47 } 48 49 void false_hits_report_final(struct bench_res res[], int res_cnt) 50 { 51 long total_hits = 0, total_drops = 0, total_false_hits = 0, total_ops = 0; 52 int i; 53 54 for (i = 0; i < res_cnt; i++) { 55 total_hits += res[i].hits; 56 total_false_hits += res[i].false_hits; 57 total_drops += res[i].drops; 58 } 59 total_ops = total_hits + total_false_hits + total_drops; 60 61 printf("Summary: %ld false hits of %ld total operations. ", 62 total_false_hits, total_ops); 63 printf("Percentage = %2.2f %%\n", 64 ((float)total_false_hits / total_ops) * 100); 65 } 66 67 void hits_drops_report_progress(int iter, struct bench_res *res, long delta_ns) 68 { 69 double hits_per_sec, drops_per_sec; 70 double hits_per_prod; 71 72 hits_per_sec = res->hits / 1000000.0 / (delta_ns / 1000000000.0); 73 hits_per_prod = hits_per_sec / env.producer_cnt; 74 drops_per_sec = res->drops / 1000000.0 / (delta_ns / 1000000000.0); 75 76 printf("Iter %3d (%7.3lfus): ", 77 iter, (delta_ns - 1000000000) / 1000.0); 78 79 printf("hits %8.3lfM/s (%7.3lfM/prod), drops %8.3lfM/s, total operations %8.3lfM/s\n", 80 hits_per_sec, hits_per_prod, drops_per_sec, hits_per_sec + drops_per_sec); 81 } 82 83 void 84 grace_period_latency_basic_stats(struct bench_res res[], int res_cnt, struct basic_stats *gp_stat) 85 { 86 int i; 87 88 memset(gp_stat, 0, sizeof(struct basic_stats)); 89 90 for (i = 0; i < res_cnt; i++) 91 gp_stat->mean += res[i].gp_ns / 1000.0 / (double)res[i].gp_ct / (0.0 + res_cnt); 92 93 #define IT_MEAN_DIFF (res[i].gp_ns / 1000.0 / (double)res[i].gp_ct - gp_stat->mean) 94 if (res_cnt > 1) { 95 for (i = 0; i < res_cnt; i++) 96 gp_stat->stddev += (IT_MEAN_DIFF * IT_MEAN_DIFF) / (res_cnt - 1.0); 97 } 98 gp_stat->stddev = sqrt(gp_stat->stddev); 99 #undef IT_MEAN_DIFF 100 } 101 102 void 103 grace_period_ticks_basic_stats(struct bench_res res[], int res_cnt, struct basic_stats *gp_stat) 104 { 105 int i; 106 107 memset(gp_stat, 0, sizeof(struct basic_stats)); 108 for (i = 0; i < res_cnt; i++) 109 gp_stat->mean += res[i].stime / (double)res[i].gp_ct / (0.0 + res_cnt); 110 111 #define IT_MEAN_DIFF (res[i].stime / (double)res[i].gp_ct - gp_stat->mean) 112 if (res_cnt > 1) { 113 for (i = 0; i < res_cnt; i++) 114 gp_stat->stddev += (IT_MEAN_DIFF * IT_MEAN_DIFF) / (res_cnt - 1.0); 115 } 116 gp_stat->stddev = sqrt(gp_stat->stddev); 117 #undef IT_MEAN_DIFF 118 } 119 120 void hits_drops_report_final(struct bench_res res[], int res_cnt) 121 { 122 int i; 123 double hits_mean = 0.0, drops_mean = 0.0, total_ops_mean = 0.0; 124 double hits_stddev = 0.0, drops_stddev = 0.0, total_ops_stddev = 0.0; 125 double total_ops; 126 127 for (i = 0; i < res_cnt; i++) { 128 hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt); 129 drops_mean += res[i].drops / 1000000.0 / (0.0 + res_cnt); 130 } 131 total_ops_mean = hits_mean + drops_mean; 132 133 if (res_cnt > 1) { 134 for (i = 0; i < res_cnt; i++) { 135 hits_stddev += (hits_mean - res[i].hits / 1000000.0) * 136 (hits_mean - res[i].hits / 1000000.0) / 137 (res_cnt - 1.0); 138 drops_stddev += (drops_mean - res[i].drops / 1000000.0) * 139 (drops_mean - res[i].drops / 1000000.0) / 140 (res_cnt - 1.0); 141 total_ops = res[i].hits + res[i].drops; 142 total_ops_stddev += (total_ops_mean - total_ops / 1000000.0) * 143 (total_ops_mean - total_ops / 1000000.0) / 144 (res_cnt - 1.0); 145 } 146 hits_stddev = sqrt(hits_stddev); 147 drops_stddev = sqrt(drops_stddev); 148 total_ops_stddev = sqrt(total_ops_stddev); 149 } 150 printf("Summary: hits %8.3lf \u00B1 %5.3lfM/s (%7.3lfM/prod), ", 151 hits_mean, hits_stddev, hits_mean / env.producer_cnt); 152 printf("drops %8.3lf \u00B1 %5.3lfM/s, ", 153 drops_mean, drops_stddev); 154 printf("total operations %8.3lf \u00B1 %5.3lfM/s\n", 155 total_ops_mean, total_ops_stddev); 156 } 157 158 void ops_report_progress(int iter, struct bench_res *res, long delta_ns) 159 { 160 double hits_per_sec, hits_per_prod; 161 162 hits_per_sec = res->hits / 1000000.0 / (delta_ns / 1000000000.0); 163 hits_per_prod = hits_per_sec / env.producer_cnt; 164 165 printf("Iter %3d (%7.3lfus): ", iter, (delta_ns - 1000000000) / 1000.0); 166 167 printf("hits %8.3lfM/s (%7.3lfM/prod)\n", hits_per_sec, hits_per_prod); 168 } 169 170 void ops_report_final(struct bench_res res[], int res_cnt) 171 { 172 double hits_mean = 0.0, hits_stddev = 0.0; 173 int i; 174 175 for (i = 0; i < res_cnt; i++) 176 hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt); 177 178 if (res_cnt > 1) { 179 for (i = 0; i < res_cnt; i++) 180 hits_stddev += (hits_mean - res[i].hits / 1000000.0) * 181 (hits_mean - res[i].hits / 1000000.0) / 182 (res_cnt - 1.0); 183 184 hits_stddev = sqrt(hits_stddev); 185 } 186 printf("Summary: throughput %8.3lf \u00B1 %5.3lf M ops/s (%7.3lfM ops/prod), ", 187 hits_mean, hits_stddev, hits_mean / env.producer_cnt); 188 printf("latency %8.3lf ns/op\n", 1000.0 / hits_mean * env.producer_cnt); 189 } 190 191 void local_storage_report_progress(int iter, struct bench_res *res, 192 long delta_ns) 193 { 194 double important_hits_per_sec, hits_per_sec; 195 double delta_sec = delta_ns / 1000000000.0; 196 197 hits_per_sec = res->hits / 1000000.0 / delta_sec; 198 important_hits_per_sec = res->important_hits / 1000000.0 / delta_sec; 199 200 printf("Iter %3d (%7.3lfus): ", iter, (delta_ns - 1000000000) / 1000.0); 201 202 printf("hits %8.3lfM/s ", hits_per_sec); 203 printf("important_hits %8.3lfM/s\n", important_hits_per_sec); 204 } 205 206 void local_storage_report_final(struct bench_res res[], int res_cnt) 207 { 208 double important_hits_mean = 0.0, important_hits_stddev = 0.0; 209 double hits_mean = 0.0, hits_stddev = 0.0; 210 int i; 211 212 for (i = 0; i < res_cnt; i++) { 213 hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt); 214 important_hits_mean += res[i].important_hits / 1000000.0 / (0.0 + res_cnt); 215 } 216 217 if (res_cnt > 1) { 218 for (i = 0; i < res_cnt; i++) { 219 hits_stddev += (hits_mean - res[i].hits / 1000000.0) * 220 (hits_mean - res[i].hits / 1000000.0) / 221 (res_cnt - 1.0); 222 important_hits_stddev += 223 (important_hits_mean - res[i].important_hits / 1000000.0) * 224 (important_hits_mean - res[i].important_hits / 1000000.0) / 225 (res_cnt - 1.0); 226 } 227 228 hits_stddev = sqrt(hits_stddev); 229 important_hits_stddev = sqrt(important_hits_stddev); 230 } 231 printf("Summary: hits throughput %8.3lf \u00B1 %5.3lf M ops/s, ", 232 hits_mean, hits_stddev); 233 printf("hits latency %8.3lf ns/op, ", 1000.0 / hits_mean); 234 printf("important_hits throughput %8.3lf \u00B1 %5.3lf M ops/s\n", 235 important_hits_mean, important_hits_stddev); 236 } 237 238 const char *argp_program_version = "benchmark"; 239 const char *argp_program_bug_address = "<bpf@vger.kernel.org>"; 240 const char argp_program_doc[] = 241 "benchmark Generic benchmarking framework.\n" 242 "\n" 243 "This tool runs benchmarks.\n" 244 "\n" 245 "USAGE: benchmark <bench-name>\n" 246 "\n" 247 "EXAMPLES:\n" 248 " # run 'count-local' benchmark with 1 producer and 1 consumer\n" 249 " benchmark count-local\n" 250 " # run 'count-local' with 16 producer and 8 consumer thread, pinned to CPUs\n" 251 " benchmark -p16 -c8 -a count-local\n"; 252 253 enum { 254 ARG_PROD_AFFINITY_SET = 1000, 255 ARG_CONS_AFFINITY_SET = 1001, 256 }; 257 258 static const struct argp_option opts[] = { 259 { "list", 'l', NULL, 0, "List available benchmarks"}, 260 { "duration", 'd', "SEC", 0, "Duration of benchmark, seconds"}, 261 { "warmup", 'w', "SEC", 0, "Warm-up period, seconds"}, 262 { "producers", 'p', "NUM", 0, "Number of producer threads"}, 263 { "consumers", 'c', "NUM", 0, "Number of consumer threads"}, 264 { "verbose", 'v', NULL, 0, "Verbose debug output"}, 265 { "affinity", 'a', NULL, 0, "Set consumer/producer thread affinity"}, 266 { "quiet", 'q', NULL, 0, "Be more quiet"}, 267 { "prod-affinity", ARG_PROD_AFFINITY_SET, "CPUSET", 0, 268 "Set of CPUs for producer threads; implies --affinity"}, 269 { "cons-affinity", ARG_CONS_AFFINITY_SET, "CPUSET", 0, 270 "Set of CPUs for consumer threads; implies --affinity"}, 271 {}, 272 }; 273 274 extern struct argp bench_ringbufs_argp; 275 extern struct argp bench_bloom_map_argp; 276 extern struct argp bench_bpf_loop_argp; 277 extern struct argp bench_local_storage_argp; 278 extern struct argp bench_local_storage_rcu_tasks_trace_argp; 279 extern struct argp bench_strncmp_argp; 280 extern struct argp bench_hashmap_lookup_argp; 281 282 static const struct argp_child bench_parsers[] = { 283 { &bench_ringbufs_argp, 0, "Ring buffers benchmark", 0 }, 284 { &bench_bloom_map_argp, 0, "Bloom filter map benchmark", 0 }, 285 { &bench_bpf_loop_argp, 0, "bpf_loop helper benchmark", 0 }, 286 { &bench_local_storage_argp, 0, "local_storage benchmark", 0 }, 287 { &bench_strncmp_argp, 0, "bpf_strncmp helper benchmark", 0 }, 288 { &bench_local_storage_rcu_tasks_trace_argp, 0, 289 "local_storage RCU Tasks Trace slowdown benchmark", 0 }, 290 { &bench_hashmap_lookup_argp, 0, "Hashmap lookup benchmark", 0 }, 291 {}, 292 }; 293 294 /* Make pos_args global, so that we can run argp_parse twice, if necessary */ 295 static int pos_args; 296 297 static error_t parse_arg(int key, char *arg, struct argp_state *state) 298 { 299 switch (key) { 300 case 'v': 301 env.verbose = true; 302 break; 303 case 'l': 304 env.list = true; 305 break; 306 case 'd': 307 env.duration_sec = strtol(arg, NULL, 10); 308 if (env.duration_sec <= 0) { 309 fprintf(stderr, "Invalid duration: %s\n", arg); 310 argp_usage(state); 311 } 312 break; 313 case 'w': 314 env.warmup_sec = strtol(arg, NULL, 10); 315 if (env.warmup_sec <= 0) { 316 fprintf(stderr, "Invalid warm-up duration: %s\n", arg); 317 argp_usage(state); 318 } 319 break; 320 case 'p': 321 env.producer_cnt = strtol(arg, NULL, 10); 322 if (env.producer_cnt <= 0) { 323 fprintf(stderr, "Invalid producer count: %s\n", arg); 324 argp_usage(state); 325 } 326 break; 327 case 'c': 328 env.consumer_cnt = strtol(arg, NULL, 10); 329 if (env.consumer_cnt <= 0) { 330 fprintf(stderr, "Invalid consumer count: %s\n", arg); 331 argp_usage(state); 332 } 333 break; 334 case 'a': 335 env.affinity = true; 336 break; 337 case 'q': 338 env.quiet = true; 339 break; 340 case ARG_PROD_AFFINITY_SET: 341 env.affinity = true; 342 if (parse_num_list(arg, &env.prod_cpus.cpus, 343 &env.prod_cpus.cpus_len)) { 344 fprintf(stderr, "Invalid format of CPU set for producers."); 345 argp_usage(state); 346 } 347 break; 348 case ARG_CONS_AFFINITY_SET: 349 env.affinity = true; 350 if (parse_num_list(arg, &env.cons_cpus.cpus, 351 &env.cons_cpus.cpus_len)) { 352 fprintf(stderr, "Invalid format of CPU set for consumers."); 353 argp_usage(state); 354 } 355 break; 356 case ARGP_KEY_ARG: 357 if (pos_args++) { 358 fprintf(stderr, 359 "Unrecognized positional argument: %s\n", arg); 360 argp_usage(state); 361 } 362 env.bench_name = strdup(arg); 363 break; 364 default: 365 return ARGP_ERR_UNKNOWN; 366 } 367 return 0; 368 } 369 370 static void parse_cmdline_args_init(int argc, char **argv) 371 { 372 static const struct argp argp = { 373 .options = opts, 374 .parser = parse_arg, 375 .doc = argp_program_doc, 376 .children = bench_parsers, 377 }; 378 if (argp_parse(&argp, argc, argv, 0, NULL, NULL)) 379 exit(1); 380 } 381 382 static void parse_cmdline_args_final(int argc, char **argv) 383 { 384 struct argp_child bench_parsers[2] = {}; 385 const struct argp argp = { 386 .options = opts, 387 .parser = parse_arg, 388 .doc = argp_program_doc, 389 .children = bench_parsers, 390 }; 391 392 /* Parse arguments the second time with the correct set of parsers */ 393 if (bench->argp) { 394 bench_parsers[0].argp = bench->argp; 395 bench_parsers[0].header = bench->name; 396 pos_args = 0; 397 if (argp_parse(&argp, argc, argv, 0, NULL, NULL)) 398 exit(1); 399 } 400 } 401 402 static void collect_measurements(long delta_ns); 403 404 static __u64 last_time_ns; 405 static void sigalarm_handler(int signo) 406 { 407 long new_time_ns = get_time_ns(); 408 long delta_ns = new_time_ns - last_time_ns; 409 410 collect_measurements(delta_ns); 411 412 last_time_ns = new_time_ns; 413 } 414 415 /* set up periodic 1-second timer */ 416 static void setup_timer() 417 { 418 static struct sigaction sigalarm_action = { 419 .sa_handler = sigalarm_handler, 420 }; 421 struct itimerval timer_settings = {}; 422 int err; 423 424 last_time_ns = get_time_ns(); 425 err = sigaction(SIGALRM, &sigalarm_action, NULL); 426 if (err < 0) { 427 fprintf(stderr, "failed to install SIGALRM handler: %d\n", -errno); 428 exit(1); 429 } 430 timer_settings.it_interval.tv_sec = 1; 431 timer_settings.it_value.tv_sec = 1; 432 err = setitimer(ITIMER_REAL, &timer_settings, NULL); 433 if (err < 0) { 434 fprintf(stderr, "failed to arm interval timer: %d\n", -errno); 435 exit(1); 436 } 437 } 438 439 static void set_thread_affinity(pthread_t thread, int cpu) 440 { 441 cpu_set_t cpuset; 442 443 CPU_ZERO(&cpuset); 444 CPU_SET(cpu, &cpuset); 445 if (pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset)) { 446 fprintf(stderr, "setting affinity to CPU #%d failed: %d\n", 447 cpu, errno); 448 exit(1); 449 } 450 } 451 452 static int next_cpu(struct cpu_set *cpu_set) 453 { 454 if (cpu_set->cpus) { 455 int i; 456 457 /* find next available CPU */ 458 for (i = cpu_set->next_cpu; i < cpu_set->cpus_len; i++) { 459 if (cpu_set->cpus[i]) { 460 cpu_set->next_cpu = i + 1; 461 return i; 462 } 463 } 464 fprintf(stderr, "Not enough CPUs specified, need CPU #%d or higher.\n", i); 465 exit(1); 466 } 467 468 return cpu_set->next_cpu++; 469 } 470 471 static struct bench_state { 472 int res_cnt; 473 struct bench_res *results; 474 pthread_t *consumers; 475 pthread_t *producers; 476 } state; 477 478 const struct bench *bench = NULL; 479 480 extern const struct bench bench_count_global; 481 extern const struct bench bench_count_local; 482 extern const struct bench bench_rename_base; 483 extern const struct bench bench_rename_kprobe; 484 extern const struct bench bench_rename_kretprobe; 485 extern const struct bench bench_rename_rawtp; 486 extern const struct bench bench_rename_fentry; 487 extern const struct bench bench_rename_fexit; 488 extern const struct bench bench_trig_base; 489 extern const struct bench bench_trig_tp; 490 extern const struct bench bench_trig_rawtp; 491 extern const struct bench bench_trig_kprobe; 492 extern const struct bench bench_trig_fentry; 493 extern const struct bench bench_trig_fentry_sleep; 494 extern const struct bench bench_trig_fmodret; 495 extern const struct bench bench_trig_uprobe_base; 496 extern const struct bench bench_trig_uprobe_with_nop; 497 extern const struct bench bench_trig_uretprobe_with_nop; 498 extern const struct bench bench_trig_uprobe_without_nop; 499 extern const struct bench bench_trig_uretprobe_without_nop; 500 extern const struct bench bench_rb_libbpf; 501 extern const struct bench bench_rb_custom; 502 extern const struct bench bench_pb_libbpf; 503 extern const struct bench bench_pb_custom; 504 extern const struct bench bench_bloom_lookup; 505 extern const struct bench bench_bloom_update; 506 extern const struct bench bench_bloom_false_positive; 507 extern const struct bench bench_hashmap_without_bloom; 508 extern const struct bench bench_hashmap_with_bloom; 509 extern const struct bench bench_bpf_loop; 510 extern const struct bench bench_strncmp_no_helper; 511 extern const struct bench bench_strncmp_helper; 512 extern const struct bench bench_bpf_hashmap_full_update; 513 extern const struct bench bench_local_storage_cache_seq_get; 514 extern const struct bench bench_local_storage_cache_interleaved_get; 515 extern const struct bench bench_local_storage_cache_hashmap_control; 516 extern const struct bench bench_local_storage_tasks_trace; 517 extern const struct bench bench_bpf_hashmap_lookup; 518 519 static const struct bench *benchs[] = { 520 &bench_count_global, 521 &bench_count_local, 522 &bench_rename_base, 523 &bench_rename_kprobe, 524 &bench_rename_kretprobe, 525 &bench_rename_rawtp, 526 &bench_rename_fentry, 527 &bench_rename_fexit, 528 &bench_trig_base, 529 &bench_trig_tp, 530 &bench_trig_rawtp, 531 &bench_trig_kprobe, 532 &bench_trig_fentry, 533 &bench_trig_fentry_sleep, 534 &bench_trig_fmodret, 535 &bench_trig_uprobe_base, 536 &bench_trig_uprobe_with_nop, 537 &bench_trig_uretprobe_with_nop, 538 &bench_trig_uprobe_without_nop, 539 &bench_trig_uretprobe_without_nop, 540 &bench_rb_libbpf, 541 &bench_rb_custom, 542 &bench_pb_libbpf, 543 &bench_pb_custom, 544 &bench_bloom_lookup, 545 &bench_bloom_update, 546 &bench_bloom_false_positive, 547 &bench_hashmap_without_bloom, 548 &bench_hashmap_with_bloom, 549 &bench_bpf_loop, 550 &bench_strncmp_no_helper, 551 &bench_strncmp_helper, 552 &bench_bpf_hashmap_full_update, 553 &bench_local_storage_cache_seq_get, 554 &bench_local_storage_cache_interleaved_get, 555 &bench_local_storage_cache_hashmap_control, 556 &bench_local_storage_tasks_trace, 557 &bench_bpf_hashmap_lookup, 558 }; 559 560 static void find_benchmark(void) 561 { 562 int i; 563 564 if (!env.bench_name) { 565 fprintf(stderr, "benchmark name is not specified\n"); 566 exit(1); 567 } 568 for (i = 0; i < ARRAY_SIZE(benchs); i++) { 569 if (strcmp(benchs[i]->name, env.bench_name) == 0) { 570 bench = benchs[i]; 571 break; 572 } 573 } 574 if (!bench) { 575 fprintf(stderr, "benchmark '%s' not found\n", env.bench_name); 576 exit(1); 577 } 578 } 579 580 static void setup_benchmark(void) 581 { 582 int i, err; 583 584 if (!env.quiet) 585 printf("Setting up benchmark '%s'...\n", bench->name); 586 587 state.producers = calloc(env.producer_cnt, sizeof(*state.producers)); 588 state.consumers = calloc(env.consumer_cnt, sizeof(*state.consumers)); 589 state.results = calloc(env.duration_sec + env.warmup_sec + 2, 590 sizeof(*state.results)); 591 if (!state.producers || !state.consumers || !state.results) 592 exit(1); 593 594 if (bench->validate) 595 bench->validate(); 596 if (bench->setup) 597 bench->setup(); 598 599 for (i = 0; i < env.consumer_cnt; i++) { 600 err = pthread_create(&state.consumers[i], NULL, 601 bench->consumer_thread, (void *)(long)i); 602 if (err) { 603 fprintf(stderr, "failed to create consumer thread #%d: %d\n", 604 i, -errno); 605 exit(1); 606 } 607 if (env.affinity) 608 set_thread_affinity(state.consumers[i], 609 next_cpu(&env.cons_cpus)); 610 } 611 612 /* unless explicit producer CPU list is specified, continue after 613 * last consumer CPU 614 */ 615 if (!env.prod_cpus.cpus) 616 env.prod_cpus.next_cpu = env.cons_cpus.next_cpu; 617 618 for (i = 0; i < env.producer_cnt; i++) { 619 err = pthread_create(&state.producers[i], NULL, 620 bench->producer_thread, (void *)(long)i); 621 if (err) { 622 fprintf(stderr, "failed to create producer thread #%d: %d\n", 623 i, -errno); 624 exit(1); 625 } 626 if (env.affinity) 627 set_thread_affinity(state.producers[i], 628 next_cpu(&env.prod_cpus)); 629 } 630 631 if (!env.quiet) 632 printf("Benchmark '%s' started.\n", bench->name); 633 } 634 635 static pthread_mutex_t bench_done_mtx = PTHREAD_MUTEX_INITIALIZER; 636 static pthread_cond_t bench_done = PTHREAD_COND_INITIALIZER; 637 638 static void collect_measurements(long delta_ns) { 639 int iter = state.res_cnt++; 640 struct bench_res *res = &state.results[iter]; 641 642 bench->measure(res); 643 644 if (bench->report_progress) 645 bench->report_progress(iter, res, delta_ns); 646 647 if (iter == env.duration_sec + env.warmup_sec) { 648 pthread_mutex_lock(&bench_done_mtx); 649 pthread_cond_signal(&bench_done); 650 pthread_mutex_unlock(&bench_done_mtx); 651 } 652 } 653 654 int main(int argc, char **argv) 655 { 656 parse_cmdline_args_init(argc, argv); 657 658 if (env.list) { 659 int i; 660 661 printf("Available benchmarks:\n"); 662 for (i = 0; i < ARRAY_SIZE(benchs); i++) { 663 printf("- %s\n", benchs[i]->name); 664 } 665 return 0; 666 } 667 668 find_benchmark(); 669 parse_cmdline_args_final(argc, argv); 670 671 setup_benchmark(); 672 673 setup_timer(); 674 675 pthread_mutex_lock(&bench_done_mtx); 676 pthread_cond_wait(&bench_done, &bench_done_mtx); 677 pthread_mutex_unlock(&bench_done_mtx); 678 679 if (bench->report_final) 680 /* skip first sample */ 681 bench->report_final(state.results + env.warmup_sec, 682 state.res_cnt - env.warmup_sec); 683 684 return 0; 685 } 686