tools/testing/selftests/bpf/bench.c

   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 = "<[email protected]>";
 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 extern struct argp bench_trigger_batch_argp;
 285 extern struct argp bench_crypto_argp;
 286
 287 static const struct argp_child bench_parsers[] = {
 288         { &bench_ringbufs_argp, 0, "Ring buffers benchmark", 0 },
 289         { &bench_bloom_map_argp, 0, "Bloom filter map benchmark", 0 },
 290         { &bench_bpf_loop_argp, 0, "bpf_loop helper benchmark", 0 },
 291         { &bench_local_storage_argp, 0, "local_storage benchmark", 0 },
 292         { &bench_strncmp_argp, 0, "bpf_strncmp helper benchmark", 0 },
 293         { &bench_local_storage_rcu_tasks_trace_argp, 0,
 294                 "local_storage RCU Tasks Trace slowdown benchmark", 0 },
 295         { &bench_hashmap_lookup_argp, 0, "Hashmap lookup benchmark", 0 },
 296         { &bench_local_storage_create_argp, 0, "local-storage-create benchmark", 0 },
 297         { &bench_htab_mem_argp, 0, "hash map memory benchmark", 0 },
 298         { &bench_trigger_batch_argp, 0, "BPF triggering benchmark", 0 },
 299         { &bench_crypto_argp, 0, "bpf crypto benchmark", 0 },
 300         {},
 301 };
 302
 303 /* Make pos_args global, so that we can run argp_parse twice, if necessary */
 304 static int pos_args;
 305
 306 static error_t parse_arg(int key, char *arg, struct argp_state *state)
 307 {
 308         switch (key) {
 309         case 'v':
 310                 env.verbose = true;
 311                 break;
 312         case 'l':
 313                 env.list = true;
 314                 break;
 315         case 'd':
 316                 env.duration_sec = strtol(arg, NULL, 10);
 317                 if (env.duration_sec <= 0) {
 318                         fprintf(stderr, "Invalid duration: %s\n", arg);
 319                         argp_usage(state);
 320                 }
 321                 break;
 322         case 'w':
 323                 env.warmup_sec = strtol(arg, NULL, 10);
 324                 if (env.warmup_sec <= 0) {
 325                         fprintf(stderr, "Invalid warm-up duration: %s\n", arg);
 326                         argp_usage(state);
 327                 }
 328                 break;
 329         case 'p':
 330                 env.producer_cnt = strtol(arg, NULL, 10);
 331                 if (env.producer_cnt < 0) {
 332                         fprintf(stderr, "Invalid producer count: %s\n", arg);
 333                         argp_usage(state);
 334                 }
 335                 break;
 336         case 'c':
 337                 env.consumer_cnt = strtol(arg, NULL, 10);
 338                 if (env.consumer_cnt < 0) {
 339                         fprintf(stderr, "Invalid consumer count: %s\n", arg);
 340                         argp_usage(state);
 341                 }
 342                 break;
 343         case 'a':
 344                 env.affinity = true;
 345                 break;
 346         case 'q':
 347                 env.quiet = true;
 348                 break;
 349         case ARG_PROD_AFFINITY_SET:
 350                 env.affinity = true;
 351                 if (parse_num_list(arg, &env.prod_cpus.cpus,
 352                                    &env.prod_cpus.cpus_len)) {
 353                         fprintf(stderr, "Invalid format of CPU set for producers.");
 354                         argp_usage(state);
 355                 }
 356                 break;
 357         case ARG_CONS_AFFINITY_SET:
 358                 env.affinity = true;
 359                 if (parse_num_list(arg, &env.cons_cpus.cpus,
 360                                    &env.cons_cpus.cpus_len)) {
 361                         fprintf(stderr, "Invalid format of CPU set for consumers.");
 362                         argp_usage(state);
 363                 }
 364                 break;
 365         case ARGP_KEY_ARG:
 366                 if (pos_args++) {
 367                         fprintf(stderr,
 368                                 "Unrecognized positional argument: %s\n", arg);
 369                         argp_usage(state);
 370                 }
 371                 env.bench_name = strdup(arg);
 372                 break;
 373         default:
 374                 return ARGP_ERR_UNKNOWN;
 375         }
 376         return 0;
 377 }
 378
 379 static void parse_cmdline_args_init(int argc, char **argv)
 380 {
 381         static const struct argp argp = {
 382                 .options = opts,
 383                 .parser = parse_arg,
 384                 .doc = argp_program_doc,
 385                 .children = bench_parsers,
 386         };
 387         if (argp_parse(&argp, argc, argv, 0, NULL, NULL))
 388                 exit(1);
 389 }
 390
 391 static void parse_cmdline_args_final(int argc, char **argv)
 392 {
 393         struct argp_child bench_parsers[2] = {};
 394         const struct argp argp = {
 395                 .options = opts,
 396                 .parser = parse_arg,
 397                 .doc = argp_program_doc,
 398                 .children = bench_parsers,
 399         };
 400
 401         /* Parse arguments the second time with the correct set of parsers */
 402         if (bench->argp) {
 403                 bench_parsers[0].argp = bench->argp;
 404                 bench_parsers[0].header = bench->name;
 405                 pos_args = 0;
 406                 if (argp_parse(&argp, argc, argv, 0, NULL, NULL))
 407                         exit(1);
 408         }
 409 }
 410
 411 static void collect_measurements(long delta_ns);
 412
 413 static __u64 last_time_ns;
 414 static void sigalarm_handler(int signo)
 415 {
 416         long new_time_ns = get_time_ns();
 417         long delta_ns = new_time_ns - last_time_ns;
 418
 419         collect_measurements(delta_ns);
 420
 421         last_time_ns = new_time_ns;
 422 }
 423
 424 /* set up periodic 1-second timer */
 425 static void setup_timer()
 426 {
 427         static struct sigaction sigalarm_action = {
 428                 .sa_handler = sigalarm_handler,
 429         };
 430         struct itimerval timer_settings = {};
 431         int err;
 432
 433         last_time_ns = get_time_ns();
 434         err = sigaction(SIGALRM, &sigalarm_action, NULL);
 435         if (err < 0) {
 436                 fprintf(stderr, "failed to install SIGALRM handler: %d\n", -errno);
 437                 exit(1);
 438         }
 439         timer_settings.it_interval.tv_sec = 1;
 440         timer_settings.it_value.tv_sec = 1;
 441         err = setitimer(ITIMER_REAL, &timer_settings, NULL);
 442         if (err < 0) {
 443                 fprintf(stderr, "failed to arm interval timer: %d\n", -errno);
 444                 exit(1);
 445         }
 446 }
 447
 448 static void set_thread_affinity(pthread_t thread, int cpu)
 449 {
 450         cpu_set_t cpuset;
 451         int err;
 452
 453         CPU_ZERO(&cpuset);
 454         CPU_SET(cpu, &cpuset);
 455         err = pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset);
 456         if (err) {
 457                 fprintf(stderr, "setting affinity to CPU #%d failed: %d\n",
 458                         cpu, -err);
 459                 exit(1);
 460         }
 461 }
 462
 463 static int next_cpu(struct cpu_set *cpu_set)
 464 {
 465         if (cpu_set->cpus) {
 466                 int i;
 467
 468                 /* find next available CPU */
 469                 for (i = cpu_set->next_cpu; i < cpu_set->cpus_len; i++) {
 470                         if (cpu_set->cpus[i]) {
 471                                 cpu_set->next_cpu = i + 1;
 472                                 return i;
 473                         }
 474                 }
 475                 fprintf(stderr, "Not enough CPUs specified, need CPU #%d or higher.\n", i);
 476                 exit(1);
 477         }
 478
 479         return cpu_set->next_cpu++ % env.nr_cpus;
 480 }
 481
 482 static struct bench_state {
 483         int res_cnt;
 484         struct bench_res *results;
 485         pthread_t *consumers;
 486         pthread_t *producers;
 487 } state;
 488
 489 const struct bench *bench = NULL;
 490
 491 extern const struct bench bench_count_global;
 492 extern const struct bench bench_count_local;
 493 extern const struct bench bench_rename_base;
 494 extern const struct bench bench_rename_kprobe;
 495 extern const struct bench bench_rename_kretprobe;
 496 extern const struct bench bench_rename_rawtp;
 497 extern const struct bench bench_rename_fentry;
 498 extern const struct bench bench_rename_fexit;
 499
 500 /* pure counting benchmarks to establish theoretical lmits */
 501 extern const struct bench bench_trig_usermode_count;
 502 extern const struct bench bench_trig_syscall_count;
 503 extern const struct bench bench_trig_kernel_count;
 504
 505 /* batched, staying mostly in-kernel benchmarks */
 506 extern const struct bench bench_trig_kprobe;
 507 extern const struct bench bench_trig_kretprobe;
 508 extern const struct bench bench_trig_kprobe_multi;
 509 extern const struct bench bench_trig_kretprobe_multi;
 510 extern const struct bench bench_trig_fentry;
 511 extern const struct bench bench_trig_fexit;
 512 extern const struct bench bench_trig_fmodret;
 513 extern const struct bench bench_trig_tp;
 514 extern const struct bench bench_trig_rawtp;
 515
 516 /* uprobe/uretprobe benchmarks */
 517 extern const struct bench bench_trig_uprobe_nop;
 518 extern const struct bench bench_trig_uretprobe_nop;
 519 extern const struct bench bench_trig_uprobe_push;
 520 extern const struct bench bench_trig_uretprobe_push;
 521 extern const struct bench bench_trig_uprobe_ret;
 522 extern const struct bench bench_trig_uretprobe_ret;
 523 extern const struct bench bench_trig_uprobe_multi_nop;
 524 extern const struct bench bench_trig_uretprobe_multi_nop;
 525 extern const struct bench bench_trig_uprobe_multi_push;
 526 extern const struct bench bench_trig_uretprobe_multi_push;
 527 extern const struct bench bench_trig_uprobe_multi_ret;
 528 extern const struct bench bench_trig_uretprobe_multi_ret;
 529
 530 extern const struct bench bench_rb_libbpf;
 531 extern const struct bench bench_rb_custom;
 532 extern const struct bench bench_pb_libbpf;
 533 extern const struct bench bench_pb_custom;
 534 extern const struct bench bench_bloom_lookup;
 535 extern const struct bench bench_bloom_update;
 536 extern const struct bench bench_bloom_false_positive;
 537 extern const struct bench bench_hashmap_without_bloom;
 538 extern const struct bench bench_hashmap_with_bloom;
 539 extern const struct bench bench_bpf_loop;
 540 extern const struct bench bench_strncmp_no_helper;
 541 extern const struct bench bench_strncmp_helper;
 542 extern const struct bench bench_bpf_hashmap_full_update;
 543 extern const struct bench bench_local_storage_cache_seq_get;
 544 extern const struct bench bench_local_storage_cache_interleaved_get;
 545 extern const struct bench bench_local_storage_cache_hashmap_control;
 546 extern const struct bench bench_local_storage_tasks_trace;
 547 extern const struct bench bench_bpf_hashmap_lookup;
 548 extern const struct bench bench_local_storage_create;
 549 extern const struct bench bench_htab_mem;
 550 extern const struct bench bench_crypto_encrypt;
 551 extern const struct bench bench_crypto_decrypt;
 552
 553 static const struct bench *benchs[] = {
 554         &bench_count_global,
 555         &bench_count_local,
 556         &bench_rename_base,
 557         &bench_rename_kprobe,
 558         &bench_rename_kretprobe,
 559         &bench_rename_rawtp,
 560         &bench_rename_fentry,
 561         &bench_rename_fexit,
 562         /* pure counting benchmarks for establishing theoretical limits */
 563         &bench_trig_usermode_count,
 564         &bench_trig_kernel_count,
 565         &bench_trig_syscall_count,
 566         /* batched, staying mostly in-kernel triggers */
 567         &bench_trig_kprobe,
 568         &bench_trig_kretprobe,
 569         &bench_trig_kprobe_multi,
 570         &bench_trig_kretprobe_multi,
 571         &bench_trig_fentry,
 572         &bench_trig_fexit,
 573         &bench_trig_fmodret,
 574         &bench_trig_tp,
 575         &bench_trig_rawtp,
 576         /* uprobes */
 577         &bench_trig_uprobe_nop,
 578         &bench_trig_uretprobe_nop,
 579         &bench_trig_uprobe_push,
 580         &bench_trig_uretprobe_push,
 581         &bench_trig_uprobe_ret,
 582         &bench_trig_uretprobe_ret,
 583         &bench_trig_uprobe_multi_nop,
 584         &bench_trig_uretprobe_multi_nop,
 585         &bench_trig_uprobe_multi_push,
 586         &bench_trig_uretprobe_multi_push,
 587         &bench_trig_uprobe_multi_ret,
 588         &bench_trig_uretprobe_multi_ret,
 589         /* ringbuf/perfbuf benchmarks */
 590         &bench_rb_libbpf,
 591         &bench_rb_custom,
 592         &bench_pb_libbpf,
 593         &bench_pb_custom,
 594         &bench_bloom_lookup,
 595         &bench_bloom_update,
 596         &bench_bloom_false_positive,
 597         &bench_hashmap_without_bloom,
 598         &bench_hashmap_with_bloom,
 599         &bench_bpf_loop,
 600         &bench_strncmp_no_helper,
 601         &bench_strncmp_helper,
 602         &bench_bpf_hashmap_full_update,
 603         &bench_local_storage_cache_seq_get,
 604         &bench_local_storage_cache_interleaved_get,
 605         &bench_local_storage_cache_hashmap_control,
 606         &bench_local_storage_tasks_trace,
 607         &bench_bpf_hashmap_lookup,
 608         &bench_local_storage_create,
 609         &bench_htab_mem,
 610         &bench_crypto_encrypt,
 611         &bench_crypto_decrypt,
 612 };
 613
 614 static void find_benchmark(void)
 615 {
 616         int i;
 617
 618         if (!env.bench_name) {
 619                 fprintf(stderr, "benchmark name is not specified\n");
 620                 exit(1);
 621         }
 622         for (i = 0; i < ARRAY_SIZE(benchs); i++) {
 623                 if (strcmp(benchs[i]->name, env.bench_name) == 0) {
 624                         bench = benchs[i];
 625                         break;
 626                 }
 627         }
 628         if (!bench) {
 629                 fprintf(stderr, "benchmark '%s' not found\n", env.bench_name);
 630                 exit(1);
 631         }
 632 }
 633
 634 static void setup_benchmark(void)
 635 {
 636         int i, err;
 637
 638         if (!env.quiet)
 639                 printf("Setting up benchmark '%s'...\n", bench->name);
 640
 641         state.producers = calloc(env.producer_cnt, sizeof(*state.producers));
 642         state.consumers = calloc(env.consumer_cnt, sizeof(*state.consumers));
 643         state.results = calloc(env.duration_sec + env.warmup_sec + 2,
 644                                sizeof(*state.results));
 645         if (!state.producers || !state.consumers || !state.results)
 646                 exit(1);
 647
 648         if (bench->validate)
 649                 bench->validate();
 650         if (bench->setup)
 651                 bench->setup();
 652
 653         for (i = 0; i < env.consumer_cnt; i++) {
 654                 if (!bench->consumer_thread) {
 655                         fprintf(stderr, "benchmark doesn't support consumers!\n");
 656                         exit(1);
 657                 }
 658                 err = pthread_create(&state.consumers[i], NULL,
 659                                      bench->consumer_thread, (void *)(long)i);
 660                 if (err) {
 661                         fprintf(stderr, "failed to create consumer thread #%d: %d\n",
 662                                 i, -err);
 663                         exit(1);
 664                 }
 665                 if (env.affinity)
 666                         set_thread_affinity(state.consumers[i],
 667                                             next_cpu(&env.cons_cpus));
 668         }
 669
 670         /* unless explicit producer CPU list is specified, continue after
 671          * last consumer CPU
 672          */
 673         if (!env.prod_cpus.cpus)
 674                 env.prod_cpus.next_cpu = env.cons_cpus.next_cpu;
 675
 676         for (i = 0; i < env.producer_cnt; i++) {
 677                 if (!bench->producer_thread) {
 678                         fprintf(stderr, "benchmark doesn't support producers!\n");
 679                         exit(1);
 680                 }
 681                 err = pthread_create(&state.producers[i], NULL,
 682                                      bench->producer_thread, (void *)(long)i);
 683                 if (err) {
 684                         fprintf(stderr, "failed to create producer thread #%d: %d\n",
 685                                 i, -err);
 686                         exit(1);
 687                 }
 688                 if (env.affinity)
 689                         set_thread_affinity(state.producers[i],
 690                                             next_cpu(&env.prod_cpus));
 691         }
 692
 693         if (!env.quiet)
 694                 printf("Benchmark '%s' started.\n", bench->name);
 695 }
 696
 697 static pthread_mutex_t bench_done_mtx = PTHREAD_MUTEX_INITIALIZER;
 698 static pthread_cond_t bench_done = PTHREAD_COND_INITIALIZER;
 699
 700 static void collect_measurements(long delta_ns) {
 701         int iter = state.res_cnt++;
 702         struct bench_res *res = &state.results[iter];
 703
 704         bench->measure(res);
 705
 706         if (bench->report_progress)
 707                 bench->report_progress(iter, res, delta_ns);
 708
 709         if (iter == env.duration_sec + env.warmup_sec) {
 710                 pthread_mutex_lock(&bench_done_mtx);
 711                 pthread_cond_signal(&bench_done);
 712                 pthread_mutex_unlock(&bench_done_mtx);
 713         }
 714 }
 715
 716 int main(int argc, char **argv)
 717 {
 718         env.nr_cpus = get_nprocs();
 719         parse_cmdline_args_init(argc, argv);
 720
 721         if (env.list) {
 722                 int i;
 723
 724                 printf("Available benchmarks:\n");
 725                 for (i = 0; i < ARRAY_SIZE(benchs); i++) {
 726                         printf("- %s\n", benchs[i]->name);
 727                 }
 728                 return 0;
 729         }
 730
 731         find_benchmark();
 732         parse_cmdline_args_final(argc, argv);
 733
 734         setup_benchmark();
 735
 736         setup_timer();
 737
 738         pthread_mutex_lock(&bench_done_mtx);
 739         pthread_cond_wait(&bench_done, &bench_done_mtx);
 740         pthread_mutex_unlock(&bench_done_mtx);
 741
 742         if (bench->report_final)
 743                 /* skip first sample */
 744                 bench->report_final(state.results + env.warmup_sec,
 745                                     state.res_cnt - env.warmup_sec);
 746
 747         return 0;
 748 }