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
libbpf_print_fn(enum libbpf_print_level level,const char * format,va_list args)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
setup_libbpf(void)31 void setup_libbpf(void)
32 {
33 libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
34 libbpf_set_print(libbpf_print_fn);
35 }
36
false_hits_report_progress(int iter,struct bench_res * res,long delta_ns)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
false_hits_report_final(struct bench_res res[],int res_cnt)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
hits_drops_report_progress(int iter,struct bench_res * res,long delta_ns)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
grace_period_latency_basic_stats(struct bench_res res[],int res_cnt,struct basic_stats * gp_stat)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
grace_period_ticks_basic_stats(struct bench_res res[],int res_cnt,struct basic_stats * gp_stat)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
hits_drops_report_final(struct bench_res res[],int res_cnt)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
ops_report_progress(int iter,struct bench_res * res,long delta_ns)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
ops_report_final(struct bench_res res[],int res_cnt)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
local_storage_report_progress(int iter,struct bench_res * res,long delta_ns)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
local_storage_report_final(struct bench_res res[],int res_cnt)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
parse_arg(int key,char * arg,struct argp_state * state)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
parse_cmdline_args(int argc,char ** argv)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;
sigalarm_handler(int signo)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 */
setup_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
set_thread_affinity(pthread_t thread,int cpu)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
next_cpu(struct cpu_set * cpu_set)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
setup_benchmark()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
collect_measurements(long delta_ns)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
main(int argc,char ** argv)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