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