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 "bpf_util.h" 14 #include "testing_helpers.h" 15 16 struct env env = { 17 .warmup_sec = 1, 18 .duration_sec = 5, 19 .affinity = false, 20 .quiet = false, 21 .consumer_cnt = 0, 22 .producer_cnt = 1, 23 }; 24 25 static int libbpf_print_fn(enum libbpf_print_level level, 26 const char *format, va_list args) 27 { 28 if (level == LIBBPF_DEBUG && !env.verbose) 29 return 0; 30 return vfprintf(stderr, format, args); 31 } 32 33 void setup_libbpf(void) 34 { 35 libbpf_set_strict_mode(LIBBPF_STRICT_ALL); 36 libbpf_set_print(libbpf_print_fn); 37 } 38 39 void false_hits_report_progress(int iter, struct bench_res *res, long delta_ns) 40 { 41 long total = res->false_hits + res->hits + res->drops; 42 43 printf("Iter %3d (%7.3lfus): ", 44 iter, (delta_ns - 1000000000) / 1000.0); 45 46 printf("%ld false hits of %ld total operations. Percentage = %2.2f %%\n", 47 res->false_hits, total, ((float)res->false_hits / total) * 100); 48 } 49 50 void false_hits_report_final(struct bench_res res[], int res_cnt) 51 { 52 long total_hits = 0, total_drops = 0, total_false_hits = 0, total_ops = 0; 53 int i; 54 55 for (i = 0; i < res_cnt; i++) { 56 total_hits += res[i].hits; 57 total_false_hits += res[i].false_hits; 58 total_drops += res[i].drops; 59 } 60 total_ops = total_hits + total_false_hits + total_drops; 61 62 printf("Summary: %ld false hits of %ld total operations. ", 63 total_false_hits, total_ops); 64 printf("Percentage = %2.2f %%\n", 65 ((float)total_false_hits / total_ops) * 100); 66 } 67 68 void hits_drops_report_progress(int iter, struct bench_res *res, long delta_ns) 69 { 70 double hits_per_sec, drops_per_sec; 71 double hits_per_prod; 72 73 hits_per_sec = res->hits / 1000000.0 / (delta_ns / 1000000000.0); 74 hits_per_prod = hits_per_sec / env.producer_cnt; 75 drops_per_sec = res->drops / 1000000.0 / (delta_ns / 1000000000.0); 76 77 printf("Iter %3d (%7.3lfus): ", 78 iter, (delta_ns - 1000000000) / 1000.0); 79 80 printf("hits %8.3lfM/s (%7.3lfM/prod), drops %8.3lfM/s, total operations %8.3lfM/s\n", 81 hits_per_sec, hits_per_prod, drops_per_sec, hits_per_sec + drops_per_sec); 82 } 83 84 void 85 grace_period_latency_basic_stats(struct bench_res res[], int res_cnt, struct basic_stats *gp_stat) 86 { 87 int i; 88 89 memset(gp_stat, 0, sizeof(struct basic_stats)); 90 91 for (i = 0; i < res_cnt; i++) 92 gp_stat->mean += res[i].gp_ns / 1000.0 / (double)res[i].gp_ct / (0.0 + res_cnt); 93 94 #define IT_MEAN_DIFF (res[i].gp_ns / 1000.0 / (double)res[i].gp_ct - gp_stat->mean) 95 if (res_cnt > 1) { 96 for (i = 0; i < res_cnt; i++) 97 gp_stat->stddev += (IT_MEAN_DIFF * IT_MEAN_DIFF) / (res_cnt - 1.0); 98 } 99 gp_stat->stddev = sqrt(gp_stat->stddev); 100 #undef IT_MEAN_DIFF 101 } 102 103 void 104 grace_period_ticks_basic_stats(struct bench_res res[], int res_cnt, struct basic_stats *gp_stat) 105 { 106 int i; 107 108 memset(gp_stat, 0, sizeof(struct basic_stats)); 109 for (i = 0; i < res_cnt; i++) 110 gp_stat->mean += res[i].stime / (double)res[i].gp_ct / (0.0 + res_cnt); 111 112 #define IT_MEAN_DIFF (res[i].stime / (double)res[i].gp_ct - gp_stat->mean) 113 if (res_cnt > 1) { 114 for (i = 0; i < res_cnt; i++) 115 gp_stat->stddev += (IT_MEAN_DIFF * IT_MEAN_DIFF) / (res_cnt - 1.0); 116 } 117 gp_stat->stddev = sqrt(gp_stat->stddev); 118 #undef IT_MEAN_DIFF 119 } 120 121 void hits_drops_report_final(struct bench_res res[], int res_cnt) 122 { 123 int i; 124 double hits_mean = 0.0, drops_mean = 0.0, total_ops_mean = 0.0; 125 double hits_stddev = 0.0, drops_stddev = 0.0, total_ops_stddev = 0.0; 126 double total_ops; 127 128 for (i = 0; i < res_cnt; i++) { 129 hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt); 130 drops_mean += res[i].drops / 1000000.0 / (0.0 + res_cnt); 131 } 132 total_ops_mean = hits_mean + drops_mean; 133 134 if (res_cnt > 1) { 135 for (i = 0; i < res_cnt; i++) { 136 hits_stddev += (hits_mean - res[i].hits / 1000000.0) * 137 (hits_mean - res[i].hits / 1000000.0) / 138 (res_cnt - 1.0); 139 drops_stddev += (drops_mean - res[i].drops / 1000000.0) * 140 (drops_mean - res[i].drops / 1000000.0) / 141 (res_cnt - 1.0); 142 total_ops = res[i].hits + res[i].drops; 143 total_ops_stddev += (total_ops_mean - total_ops / 1000000.0) * 144 (total_ops_mean - total_ops / 1000000.0) / 145 (res_cnt - 1.0); 146 } 147 hits_stddev = sqrt(hits_stddev); 148 drops_stddev = sqrt(drops_stddev); 149 total_ops_stddev = sqrt(total_ops_stddev); 150 } 151 printf("Summary: hits %8.3lf \u00B1 %5.3lfM/s (%7.3lfM/prod), ", 152 hits_mean, hits_stddev, hits_mean / env.producer_cnt); 153 printf("drops %8.3lf \u00B1 %5.3lfM/s, ", 154 drops_mean, drops_stddev); 155 printf("total operations %8.3lf \u00B1 %5.3lfM/s\n", 156 total_ops_mean, total_ops_stddev); 157 } 158 159 void ops_report_progress(int iter, struct bench_res *res, long delta_ns) 160 { 161 double hits_per_sec, hits_per_prod; 162 163 hits_per_sec = res->hits / 1000000.0 / (delta_ns / 1000000000.0); 164 hits_per_prod = hits_per_sec / env.producer_cnt; 165 166 printf("Iter %3d (%7.3lfus): ", iter, (delta_ns - 1000000000) / 1000.0); 167 168 printf("hits %8.3lfM/s (%7.3lfM/prod)\n", hits_per_sec, hits_per_prod); 169 } 170 171 void ops_report_final(struct bench_res res[], int res_cnt) 172 { 173 double hits_mean = 0.0, hits_stddev = 0.0; 174 int i; 175 176 for (i = 0; i < res_cnt; i++) 177 hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt); 178 179 if (res_cnt > 1) { 180 for (i = 0; i < res_cnt; i++) 181 hits_stddev += (hits_mean - res[i].hits / 1000000.0) * 182 (hits_mean - res[i].hits / 1000000.0) / 183 (res_cnt - 1.0); 184 185 hits_stddev = sqrt(hits_stddev); 186 } 187 printf("Summary: throughput %8.3lf \u00B1 %5.3lf M ops/s (%7.3lfM ops/prod), ", 188 hits_mean, hits_stddev, hits_mean / env.producer_cnt); 189 printf("latency %8.3lf ns/op\n", 1000.0 / hits_mean * env.producer_cnt); 190 } 191 192 void local_storage_report_progress(int iter, struct bench_res *res, 193 long delta_ns) 194 { 195 double important_hits_per_sec, hits_per_sec; 196 double delta_sec = delta_ns / 1000000000.0; 197 198 hits_per_sec = res->hits / 1000000.0 / delta_sec; 199 important_hits_per_sec = res->important_hits / 1000000.0 / delta_sec; 200 201 printf("Iter %3d (%7.3lfus): ", iter, (delta_ns - 1000000000) / 1000.0); 202 203 printf("hits %8.3lfM/s ", hits_per_sec); 204 printf("important_hits %8.3lfM/s\n", important_hits_per_sec); 205 } 206 207 void local_storage_report_final(struct bench_res res[], int res_cnt) 208 { 209 double important_hits_mean = 0.0, important_hits_stddev = 0.0; 210 double hits_mean = 0.0, hits_stddev = 0.0; 211 int i; 212 213 for (i = 0; i < res_cnt; i++) { 214 hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt); 215 important_hits_mean += res[i].important_hits / 1000000.0 / (0.0 + res_cnt); 216 } 217 218 if (res_cnt > 1) { 219 for (i = 0; i < res_cnt; i++) { 220 hits_stddev += (hits_mean - res[i].hits / 1000000.0) * 221 (hits_mean - res[i].hits / 1000000.0) / 222 (res_cnt - 1.0); 223 important_hits_stddev += 224 (important_hits_mean - res[i].important_hits / 1000000.0) * 225 (important_hits_mean - res[i].important_hits / 1000000.0) / 226 (res_cnt - 1.0); 227 } 228 229 hits_stddev = sqrt(hits_stddev); 230 important_hits_stddev = sqrt(important_hits_stddev); 231 } 232 printf("Summary: hits throughput %8.3lf \u00B1 %5.3lf M ops/s, ", 233 hits_mean, hits_stddev); 234 printf("hits latency %8.3lf ns/op, ", 1000.0 / hits_mean); 235 printf("important_hits throughput %8.3lf \u00B1 %5.3lf M ops/s\n", 236 important_hits_mean, important_hits_stddev); 237 } 238 239 const char *argp_program_version = "benchmark"; 240 const char *argp_program_bug_address = "<bpf@vger.kernel.org>"; 241 const char argp_program_doc[] = 242 "benchmark Generic benchmarking framework.\n" 243 "\n" 244 "This tool runs benchmarks.\n" 245 "\n" 246 "USAGE: benchmark <bench-name>\n" 247 "\n" 248 "EXAMPLES:\n" 249 " # run 'count-local' benchmark with 1 producer and 1 consumer\n" 250 " benchmark count-local\n" 251 " # run 'count-local' with 16 producer and 8 consumer thread, pinned to CPUs\n" 252 " benchmark -p16 -c8 -a count-local\n"; 253 254 enum { 255 ARG_PROD_AFFINITY_SET = 1000, 256 ARG_CONS_AFFINITY_SET = 1001, 257 }; 258 259 static const struct argp_option opts[] = { 260 { "list", 'l', NULL, 0, "List available benchmarks"}, 261 { "duration", 'd', "SEC", 0, "Duration of benchmark, seconds"}, 262 { "warmup", 'w', "SEC", 0, "Warm-up period, seconds"}, 263 { "producers", 'p', "NUM", 0, "Number of producer threads"}, 264 { "consumers", 'c', "NUM", 0, "Number of consumer threads"}, 265 { "verbose", 'v', NULL, 0, "Verbose debug output"}, 266 { "affinity", 'a', NULL, 0, "Set consumer/producer thread affinity"}, 267 { "quiet", 'q', NULL, 0, "Be more quiet"}, 268 { "prod-affinity", ARG_PROD_AFFINITY_SET, "CPUSET", 0, 269 "Set of CPUs for producer threads; implies --affinity"}, 270 { "cons-affinity", ARG_CONS_AFFINITY_SET, "CPUSET", 0, 271 "Set of CPUs for consumer threads; implies --affinity"}, 272 {}, 273 }; 274 275 extern struct argp bench_ringbufs_argp; 276 extern struct argp bench_bloom_map_argp; 277 extern struct argp bench_bpf_loop_argp; 278 extern struct argp bench_local_storage_argp; 279 extern struct argp bench_local_storage_rcu_tasks_trace_argp; 280 extern struct argp bench_strncmp_argp; 281 extern struct argp bench_hashmap_lookup_argp; 282 extern struct argp bench_local_storage_create_argp; 283 extern struct argp bench_htab_mem_argp; 284 285 static const struct argp_child bench_parsers[] = { 286 { &bench_ringbufs_argp, 0, "Ring buffers benchmark", 0 }, 287 { &bench_bloom_map_argp, 0, "Bloom filter map benchmark", 0 }, 288 { &bench_bpf_loop_argp, 0, "bpf_loop helper benchmark", 0 }, 289 { &bench_local_storage_argp, 0, "local_storage benchmark", 0 }, 290 { &bench_strncmp_argp, 0, "bpf_strncmp helper benchmark", 0 }, 291 { &bench_local_storage_rcu_tasks_trace_argp, 0, 292 "local_storage RCU Tasks Trace slowdown benchmark", 0 }, 293 { &bench_hashmap_lookup_argp, 0, "Hashmap lookup benchmark", 0 }, 294 { &bench_local_storage_create_argp, 0, "local-storage-create benchmark", 0 }, 295 { &bench_htab_mem_argp, 0, "hash map memory benchmark", 0 }, 296 {}, 297 }; 298 299 /* Make pos_args global, so that we can run argp_parse twice, if necessary */ 300 static int pos_args; 301 302 static error_t parse_arg(int key, char *arg, struct argp_state *state) 303 { 304 switch (key) { 305 case 'v': 306 env.verbose = true; 307 break; 308 case 'l': 309 env.list = true; 310 break; 311 case 'd': 312 env.duration_sec = strtol(arg, NULL, 10); 313 if (env.duration_sec <= 0) { 314 fprintf(stderr, "Invalid duration: %s\n", arg); 315 argp_usage(state); 316 } 317 break; 318 case 'w': 319 env.warmup_sec = strtol(arg, NULL, 10); 320 if (env.warmup_sec <= 0) { 321 fprintf(stderr, "Invalid warm-up duration: %s\n", arg); 322 argp_usage(state); 323 } 324 break; 325 case 'p': 326 env.producer_cnt = strtol(arg, NULL, 10); 327 if (env.producer_cnt <= 0) { 328 fprintf(stderr, "Invalid producer count: %s\n", arg); 329 argp_usage(state); 330 } 331 break; 332 case 'c': 333 env.consumer_cnt = strtol(arg, NULL, 10); 334 if (env.consumer_cnt <= 0) { 335 fprintf(stderr, "Invalid consumer count: %s\n", arg); 336 argp_usage(state); 337 } 338 break; 339 case 'a': 340 env.affinity = true; 341 break; 342 case 'q': 343 env.quiet = true; 344 break; 345 case ARG_PROD_AFFINITY_SET: 346 env.affinity = true; 347 if (parse_num_list(arg, &env.prod_cpus.cpus, 348 &env.prod_cpus.cpus_len)) { 349 fprintf(stderr, "Invalid format of CPU set for producers."); 350 argp_usage(state); 351 } 352 break; 353 case ARG_CONS_AFFINITY_SET: 354 env.affinity = true; 355 if (parse_num_list(arg, &env.cons_cpus.cpus, 356 &env.cons_cpus.cpus_len)) { 357 fprintf(stderr, "Invalid format of CPU set for consumers."); 358 argp_usage(state); 359 } 360 break; 361 case ARGP_KEY_ARG: 362 if (pos_args++) { 363 fprintf(stderr, 364 "Unrecognized positional argument: %s\n", arg); 365 argp_usage(state); 366 } 367 env.bench_name = strdup(arg); 368 break; 369 default: 370 return ARGP_ERR_UNKNOWN; 371 } 372 return 0; 373 } 374 375 static void parse_cmdline_args_init(int argc, char **argv) 376 { 377 static const struct argp argp = { 378 .options = opts, 379 .parser = parse_arg, 380 .doc = argp_program_doc, 381 .children = bench_parsers, 382 }; 383 if (argp_parse(&argp, argc, argv, 0, NULL, NULL)) 384 exit(1); 385 } 386 387 static void parse_cmdline_args_final(int argc, char **argv) 388 { 389 struct argp_child bench_parsers[2] = {}; 390 const struct argp argp = { 391 .options = opts, 392 .parser = parse_arg, 393 .doc = argp_program_doc, 394 .children = bench_parsers, 395 }; 396 397 /* Parse arguments the second time with the correct set of parsers */ 398 if (bench->argp) { 399 bench_parsers[0].argp = bench->argp; 400 bench_parsers[0].header = bench->name; 401 pos_args = 0; 402 if (argp_parse(&argp, argc, argv, 0, NULL, NULL)) 403 exit(1); 404 } 405 } 406 407 static void collect_measurements(long delta_ns); 408 409 static __u64 last_time_ns; 410 static void sigalarm_handler(int signo) 411 { 412 long new_time_ns = get_time_ns(); 413 long delta_ns = new_time_ns - last_time_ns; 414 415 collect_measurements(delta_ns); 416 417 last_time_ns = new_time_ns; 418 } 419 420 /* set up periodic 1-second timer */ 421 static void setup_timer() 422 { 423 static struct sigaction sigalarm_action = { 424 .sa_handler = sigalarm_handler, 425 }; 426 struct itimerval timer_settings = {}; 427 int err; 428 429 last_time_ns = get_time_ns(); 430 err = sigaction(SIGALRM, &sigalarm_action, NULL); 431 if (err < 0) { 432 fprintf(stderr, "failed to install SIGALRM handler: %d\n", -errno); 433 exit(1); 434 } 435 timer_settings.it_interval.tv_sec = 1; 436 timer_settings.it_value.tv_sec = 1; 437 err = setitimer(ITIMER_REAL, &timer_settings, NULL); 438 if (err < 0) { 439 fprintf(stderr, "failed to arm interval timer: %d\n", -errno); 440 exit(1); 441 } 442 } 443 444 static void set_thread_affinity(pthread_t thread, int cpu) 445 { 446 cpu_set_t cpuset; 447 int err; 448 449 CPU_ZERO(&cpuset); 450 CPU_SET(cpu, &cpuset); 451 err = pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset); 452 if (err) { 453 fprintf(stderr, "setting affinity to CPU #%d failed: %d\n", 454 cpu, -err); 455 exit(1); 456 } 457 } 458 459 static int next_cpu(struct cpu_set *cpu_set) 460 { 461 if (cpu_set->cpus) { 462 int i; 463 464 /* find next available CPU */ 465 for (i = cpu_set->next_cpu; i < cpu_set->cpus_len; i++) { 466 if (cpu_set->cpus[i]) { 467 cpu_set->next_cpu = i + 1; 468 return i; 469 } 470 } 471 fprintf(stderr, "Not enough CPUs specified, need CPU #%d or higher.\n", i); 472 exit(1); 473 } 474 475 return cpu_set->next_cpu++ % env.nr_cpus; 476 } 477 478 static struct bench_state { 479 int res_cnt; 480 struct bench_res *results; 481 pthread_t *consumers; 482 pthread_t *producers; 483 } state; 484 485 const struct bench *bench = NULL; 486 487 extern const struct bench bench_count_global; 488 extern const struct bench bench_count_local; 489 extern const struct bench bench_rename_base; 490 extern const struct bench bench_rename_kprobe; 491 extern const struct bench bench_rename_kretprobe; 492 extern const struct bench bench_rename_rawtp; 493 extern const struct bench bench_rename_fentry; 494 extern const struct bench bench_rename_fexit; 495 extern const struct bench bench_trig_base; 496 extern const struct bench bench_trig_tp; 497 extern const struct bench bench_trig_rawtp; 498 extern const struct bench bench_trig_kprobe; 499 extern const struct bench bench_trig_fentry; 500 extern const struct bench bench_trig_fentry_sleep; 501 extern const struct bench bench_trig_fmodret; 502 extern const struct bench bench_trig_uprobe_base; 503 extern const struct bench bench_trig_uprobe_with_nop; 504 extern const struct bench bench_trig_uretprobe_with_nop; 505 extern const struct bench bench_trig_uprobe_without_nop; 506 extern const struct bench bench_trig_uretprobe_without_nop; 507 extern const struct bench bench_rb_libbpf; 508 extern const struct bench bench_rb_custom; 509 extern const struct bench bench_pb_libbpf; 510 extern const struct bench bench_pb_custom; 511 extern const struct bench bench_bloom_lookup; 512 extern const struct bench bench_bloom_update; 513 extern const struct bench bench_bloom_false_positive; 514 extern const struct bench bench_hashmap_without_bloom; 515 extern const struct bench bench_hashmap_with_bloom; 516 extern const struct bench bench_bpf_loop; 517 extern const struct bench bench_strncmp_no_helper; 518 extern const struct bench bench_strncmp_helper; 519 extern const struct bench bench_bpf_hashmap_full_update; 520 extern const struct bench bench_local_storage_cache_seq_get; 521 extern const struct bench bench_local_storage_cache_interleaved_get; 522 extern const struct bench bench_local_storage_cache_hashmap_control; 523 extern const struct bench bench_local_storage_tasks_trace; 524 extern const struct bench bench_bpf_hashmap_lookup; 525 extern const struct bench bench_local_storage_create; 526 extern const struct bench bench_htab_mem; 527 528 static const struct bench *benchs[] = { 529 &bench_count_global, 530 &bench_count_local, 531 &bench_rename_base, 532 &bench_rename_kprobe, 533 &bench_rename_kretprobe, 534 &bench_rename_rawtp, 535 &bench_rename_fentry, 536 &bench_rename_fexit, 537 &bench_trig_base, 538 &bench_trig_tp, 539 &bench_trig_rawtp, 540 &bench_trig_kprobe, 541 &bench_trig_fentry, 542 &bench_trig_fentry_sleep, 543 &bench_trig_fmodret, 544 &bench_trig_uprobe_base, 545 &bench_trig_uprobe_with_nop, 546 &bench_trig_uretprobe_with_nop, 547 &bench_trig_uprobe_without_nop, 548 &bench_trig_uretprobe_without_nop, 549 &bench_rb_libbpf, 550 &bench_rb_custom, 551 &bench_pb_libbpf, 552 &bench_pb_custom, 553 &bench_bloom_lookup, 554 &bench_bloom_update, 555 &bench_bloom_false_positive, 556 &bench_hashmap_without_bloom, 557 &bench_hashmap_with_bloom, 558 &bench_bpf_loop, 559 &bench_strncmp_no_helper, 560 &bench_strncmp_helper, 561 &bench_bpf_hashmap_full_update, 562 &bench_local_storage_cache_seq_get, 563 &bench_local_storage_cache_interleaved_get, 564 &bench_local_storage_cache_hashmap_control, 565 &bench_local_storage_tasks_trace, 566 &bench_bpf_hashmap_lookup, 567 &bench_local_storage_create, 568 &bench_htab_mem, 569 }; 570 571 static void find_benchmark(void) 572 { 573 int i; 574 575 if (!env.bench_name) { 576 fprintf(stderr, "benchmark name is not specified\n"); 577 exit(1); 578 } 579 for (i = 0; i < ARRAY_SIZE(benchs); i++) { 580 if (strcmp(benchs[i]->name, env.bench_name) == 0) { 581 bench = benchs[i]; 582 break; 583 } 584 } 585 if (!bench) { 586 fprintf(stderr, "benchmark '%s' not found\n", env.bench_name); 587 exit(1); 588 } 589 } 590 591 static void setup_benchmark(void) 592 { 593 int i, err; 594 595 if (!env.quiet) 596 printf("Setting up benchmark '%s'...\n", bench->name); 597 598 state.producers = calloc(env.producer_cnt, sizeof(*state.producers)); 599 state.consumers = calloc(env.consumer_cnt, sizeof(*state.consumers)); 600 state.results = calloc(env.duration_sec + env.warmup_sec + 2, 601 sizeof(*state.results)); 602 if (!state.producers || !state.consumers || !state.results) 603 exit(1); 604 605 if (bench->validate) 606 bench->validate(); 607 if (bench->setup) 608 bench->setup(); 609 610 for (i = 0; i < env.consumer_cnt; i++) { 611 err = pthread_create(&state.consumers[i], NULL, 612 bench->consumer_thread, (void *)(long)i); 613 if (err) { 614 fprintf(stderr, "failed to create consumer thread #%d: %d\n", 615 i, -err); 616 exit(1); 617 } 618 if (env.affinity) 619 set_thread_affinity(state.consumers[i], 620 next_cpu(&env.cons_cpus)); 621 } 622 623 /* unless explicit producer CPU list is specified, continue after 624 * last consumer CPU 625 */ 626 if (!env.prod_cpus.cpus) 627 env.prod_cpus.next_cpu = env.cons_cpus.next_cpu; 628 629 for (i = 0; i < env.producer_cnt; i++) { 630 err = pthread_create(&state.producers[i], NULL, 631 bench->producer_thread, (void *)(long)i); 632 if (err) { 633 fprintf(stderr, "failed to create producer thread #%d: %d\n", 634 i, -err); 635 exit(1); 636 } 637 if (env.affinity) 638 set_thread_affinity(state.producers[i], 639 next_cpu(&env.prod_cpus)); 640 } 641 642 if (!env.quiet) 643 printf("Benchmark '%s' started.\n", bench->name); 644 } 645 646 static pthread_mutex_t bench_done_mtx = PTHREAD_MUTEX_INITIALIZER; 647 static pthread_cond_t bench_done = PTHREAD_COND_INITIALIZER; 648 649 static void collect_measurements(long delta_ns) { 650 int iter = state.res_cnt++; 651 struct bench_res *res = &state.results[iter]; 652 653 bench->measure(res); 654 655 if (bench->report_progress) 656 bench->report_progress(iter, res, delta_ns); 657 658 if (iter == env.duration_sec + env.warmup_sec) { 659 pthread_mutex_lock(&bench_done_mtx); 660 pthread_cond_signal(&bench_done); 661 pthread_mutex_unlock(&bench_done_mtx); 662 } 663 } 664 665 int main(int argc, char **argv) 666 { 667 env.nr_cpus = get_nprocs(); 668 parse_cmdline_args_init(argc, argv); 669 670 if (env.list) { 671 int i; 672 673 printf("Available benchmarks:\n"); 674 for (i = 0; i < ARRAY_SIZE(benchs); i++) { 675 printf("- %s\n", benchs[i]->name); 676 } 677 return 0; 678 } 679 680 find_benchmark(); 681 parse_cmdline_args_final(argc, argv); 682 683 setup_benchmark(); 684 685 setup_timer(); 686 687 pthread_mutex_lock(&bench_done_mtx); 688 pthread_cond_wait(&bench_done, &bench_done_mtx); 689 pthread_mutex_unlock(&bench_done_mtx); 690 691 if (bench->report_final) 692 /* skip first sample */ 693 bench->report_final(state.results + env.warmup_sec, 694 state.res_cnt - env.warmup_sec); 695 696 return 0; 697 } 698