1
2
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 <sys/resource.h>
12#include <signal.h>
13#include "bench.h"
14#include "testing_helpers.h"
15
16struct env env = {
17 .warmup_sec = 1,
18 .duration_sec = 5,
19 .affinity = false,
20 .consumer_cnt = 1,
21 .producer_cnt = 1,
22};
23
24static int libbpf_print_fn(enum libbpf_print_level level,
25 const char *format, va_list args)
26{
27 if (level == LIBBPF_DEBUG && !env.verbose)
28 return 0;
29 return vfprintf(stderr, format, args);
30}
31
32static int bump_memlock_rlimit(void)
33{
34 struct rlimit rlim_new = {
35 .rlim_cur = RLIM_INFINITY,
36 .rlim_max = RLIM_INFINITY,
37 };
38
39 return setrlimit(RLIMIT_MEMLOCK, &rlim_new);
40}
41
42void setup_libbpf()
43{
44 int err;
45
46 libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
47 libbpf_set_print(libbpf_print_fn);
48
49 err = bump_memlock_rlimit();
50 if (err)
51 fprintf(stderr, "failed to increase RLIMIT_MEMLOCK: %d", err);
52}
53
54void hits_drops_report_progress(int iter, struct bench_res *res, long delta_ns)
55{
56 double hits_per_sec, drops_per_sec;
57 double hits_per_prod;
58
59 hits_per_sec = res->hits / 1000000.0 / (delta_ns / 1000000000.0);
60 hits_per_prod = hits_per_sec / env.producer_cnt;
61 drops_per_sec = res->drops / 1000000.0 / (delta_ns / 1000000000.0);
62
63 printf("Iter %3d (%7.3lfus): ",
64 iter, (delta_ns - 1000000000) / 1000.0);
65
66 printf("hits %8.3lfM/s (%7.3lfM/prod), drops %8.3lfM/s\n",
67 hits_per_sec, hits_per_prod, drops_per_sec);
68}
69
70void hits_drops_report_final(struct bench_res res[], int res_cnt)
71{
72 int i;
73 double hits_mean = 0.0, drops_mean = 0.0;
74 double hits_stddev = 0.0, drops_stddev = 0.0;
75
76 for (i = 0; i < res_cnt; i++) {
77 hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt);
78 drops_mean += res[i].drops / 1000000.0 / (0.0 + res_cnt);
79 }
80
81 if (res_cnt > 1) {
82 for (i = 0; i < res_cnt; i++) {
83 hits_stddev += (hits_mean - res[i].hits / 1000000.0) *
84 (hits_mean - res[i].hits / 1000000.0) /
85 (res_cnt - 1.0);
86 drops_stddev += (drops_mean - res[i].drops / 1000000.0) *
87 (drops_mean - res[i].drops / 1000000.0) /
88 (res_cnt - 1.0);
89 }
90 hits_stddev = sqrt(hits_stddev);
91 drops_stddev = sqrt(drops_stddev);
92 }
93 printf("Summary: hits %8.3lf \u00B1 %5.3lfM/s (%7.3lfM/prod), ",
94 hits_mean, hits_stddev, hits_mean / env.producer_cnt);
95 printf("drops %8.3lf \u00B1 %5.3lfM/s\n",
96 drops_mean, drops_stddev);
97}
98
99const char *argp_program_version = "benchmark";
100const char *argp_program_bug_address = "<bpf@vger.kernel.org>";
101const char argp_program_doc[] =
102"benchmark Generic benchmarking framework.\n"
103"\n"
104"This tool runs benchmarks.\n"
105"\n"
106"USAGE: benchmark <bench-name>\n"
107"\n"
108"EXAMPLES:\n"
109" # run 'count-local' benchmark with 1 producer and 1 consumer\n"
110" benchmark count-local\n"
111" # run 'count-local' with 16 producer and 8 consumer thread, pinned to CPUs\n"
112" benchmark -p16 -c8 -a count-local\n";
113
114enum {
115 ARG_PROD_AFFINITY_SET = 1000,
116 ARG_CONS_AFFINITY_SET = 1001,
117};
118
119static const struct argp_option opts[] = {
120 { "list", 'l', NULL, 0, "List available benchmarks"},
121 { "duration", 'd', "SEC", 0, "Duration of benchmark, seconds"},
122 { "warmup", 'w', "SEC", 0, "Warm-up period, seconds"},
123 { "producers", 'p', "NUM", 0, "Number of producer threads"},
124 { "consumers", 'c', "NUM", 0, "Number of consumer threads"},
125 { "verbose", 'v', NULL, 0, "Verbose debug output"},
126 { "affinity", 'a', NULL, 0, "Set consumer/producer thread affinity"},
127 { "prod-affinity", ARG_PROD_AFFINITY_SET, "CPUSET", 0,
128 "Set of CPUs for producer threads; implies --affinity"},
129 { "cons-affinity", ARG_CONS_AFFINITY_SET, "CPUSET", 0,
130 "Set of CPUs for consumer threads; implies --affinity"},
131 {},
132};
133
134extern struct argp bench_ringbufs_argp;
135
136static const struct argp_child bench_parsers[] = {
137 { &bench_ringbufs_argp, 0, "Ring buffers benchmark", 0 },
138 {},
139};
140
141static error_t parse_arg(int key, char *arg, struct argp_state *state)
142{
143 static int pos_args;
144
145 switch (key) {
146 case 'v':
147 env.verbose = true;
148 break;
149 case 'l':
150 env.list = true;
151 break;
152 case 'd':
153 env.duration_sec = strtol(arg, NULL, 10);
154 if (env.duration_sec <= 0) {
155 fprintf(stderr, "Invalid duration: %s\n", arg);
156 argp_usage(state);
157 }
158 break;
159 case 'w':
160 env.warmup_sec = strtol(arg, NULL, 10);
161 if (env.warmup_sec <= 0) {
162 fprintf(stderr, "Invalid warm-up duration: %s\n", arg);
163 argp_usage(state);
164 }
165 break;
166 case 'p':
167 env.producer_cnt = strtol(arg, NULL, 10);
168 if (env.producer_cnt <= 0) {
169 fprintf(stderr, "Invalid producer count: %s\n", arg);
170 argp_usage(state);
171 }
172 break;
173 case 'c':
174 env.consumer_cnt = strtol(arg, NULL, 10);
175 if (env.consumer_cnt <= 0) {
176 fprintf(stderr, "Invalid consumer count: %s\n", arg);
177 argp_usage(state);
178 }
179 break;
180 case 'a':
181 env.affinity = true;
182 break;
183 case ARG_PROD_AFFINITY_SET:
184 env.affinity = true;
185 if (parse_num_list(arg, &env.prod_cpus.cpus,
186 &env.prod_cpus.cpus_len)) {
187 fprintf(stderr, "Invalid format of CPU set for producers.");
188 argp_usage(state);
189 }
190 break;
191 case ARG_CONS_AFFINITY_SET:
192 env.affinity = true;
193 if (parse_num_list(arg, &env.cons_cpus.cpus,
194 &env.cons_cpus.cpus_len)) {
195 fprintf(stderr, "Invalid format of CPU set for consumers.");
196 argp_usage(state);
197 }
198 break;
199 case ARGP_KEY_ARG:
200 if (pos_args++) {
201 fprintf(stderr,
202 "Unrecognized positional argument: %s\n", arg);
203 argp_usage(state);
204 }
205 env.bench_name = strdup(arg);
206 break;
207 default:
208 return ARGP_ERR_UNKNOWN;
209 }
210 return 0;
211}
212
213static void parse_cmdline_args(int argc, char **argv)
214{
215 static const struct argp argp = {
216 .options = opts,
217 .parser = parse_arg,
218 .doc = argp_program_doc,
219 .children = bench_parsers,
220 };
221 if (argp_parse(&argp, argc, argv, 0, NULL, NULL))
222 exit(1);
223 if (!env.list && !env.bench_name) {
224 argp_help(&argp, stderr, ARGP_HELP_DOC, "bench");
225 exit(1);
226 }
227}
228
229static void collect_measurements(long delta_ns);
230
231static __u64 last_time_ns;
232static void sigalarm_handler(int signo)
233{
234 long new_time_ns = get_time_ns();
235 long delta_ns = new_time_ns - last_time_ns;
236
237 collect_measurements(delta_ns);
238
239 last_time_ns = new_time_ns;
240}
241
242
243static void setup_timer()
244{
245 static struct sigaction sigalarm_action = {
246 .sa_handler = sigalarm_handler,
247 };
248 struct itimerval timer_settings = {};
249 int err;
250
251 last_time_ns = get_time_ns();
252 err = sigaction(SIGALRM, &sigalarm_action, NULL);
253 if (err < 0) {
254 fprintf(stderr, "failed to install SIGALRM handler: %d\n", -errno);
255 exit(1);
256 }
257 timer_settings.it_interval.tv_sec = 1;
258 timer_settings.it_value.tv_sec = 1;
259 err = setitimer(ITIMER_REAL, &timer_settings, NULL);
260 if (err < 0) {
261 fprintf(stderr, "failed to arm interval timer: %d\n", -errno);
262 exit(1);
263 }
264}
265
266static void set_thread_affinity(pthread_t thread, int cpu)
267{
268 cpu_set_t cpuset;
269
270 CPU_ZERO(&cpuset);
271 CPU_SET(cpu, &cpuset);
272 if (pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset)) {
273 fprintf(stderr, "setting affinity to CPU #%d failed: %d\n",
274 cpu, errno);
275 exit(1);
276 }
277}
278
279static int next_cpu(struct cpu_set *cpu_set)
280{
281 if (cpu_set->cpus) {
282 int i;
283
284
285 for (i = cpu_set->next_cpu; i < cpu_set->cpus_len; i++) {
286 if (cpu_set->cpus[i]) {
287 cpu_set->next_cpu = i + 1;
288 return i;
289 }
290 }
291 fprintf(stderr, "Not enough CPUs specified, need CPU #%d or higher.\n", i);
292 exit(1);
293 }
294
295 return cpu_set->next_cpu++;
296}
297
298static struct bench_state {
299 int res_cnt;
300 struct bench_res *results;
301 pthread_t *consumers;
302 pthread_t *producers;
303} state;
304
305const struct bench *bench = NULL;
306
307extern const struct bench bench_count_global;
308extern const struct bench bench_count_local;
309extern const struct bench bench_rename_base;
310extern const struct bench bench_rename_kprobe;
311extern const struct bench bench_rename_kretprobe;
312extern const struct bench bench_rename_rawtp;
313extern const struct bench bench_rename_fentry;
314extern const struct bench bench_rename_fexit;
315extern const struct bench bench_trig_base;
316extern const struct bench bench_trig_tp;
317extern const struct bench bench_trig_rawtp;
318extern const struct bench bench_trig_kprobe;
319extern const struct bench bench_trig_fentry;
320extern const struct bench bench_trig_fentry_sleep;
321extern const struct bench bench_trig_fmodret;
322extern const struct bench bench_rb_libbpf;
323extern const struct bench bench_rb_custom;
324extern const struct bench bench_pb_libbpf;
325extern const struct bench bench_pb_custom;
326
327static const struct bench *benchs[] = {
328 &bench_count_global,
329 &bench_count_local,
330 &bench_rename_base,
331 &bench_rename_kprobe,
332 &bench_rename_kretprobe,
333 &bench_rename_rawtp,
334 &bench_rename_fentry,
335 &bench_rename_fexit,
336 &bench_trig_base,
337 &bench_trig_tp,
338 &bench_trig_rawtp,
339 &bench_trig_kprobe,
340 &bench_trig_fentry,
341 &bench_trig_fentry_sleep,
342 &bench_trig_fmodret,
343 &bench_rb_libbpf,
344 &bench_rb_custom,
345 &bench_pb_libbpf,
346 &bench_pb_custom,
347};
348
349static void setup_benchmark()
350{
351 int i, err;
352
353 if (!env.bench_name) {
354 fprintf(stderr, "benchmark name is not specified\n");
355 exit(1);
356 }
357
358 for (i = 0; i < ARRAY_SIZE(benchs); i++) {
359 if (strcmp(benchs[i]->name, env.bench_name) == 0) {
360 bench = benchs[i];
361 break;
362 }
363 }
364 if (!bench) {
365 fprintf(stderr, "benchmark '%s' not found\n", env.bench_name);
366 exit(1);
367 }
368
369 printf("Setting up benchmark '%s'...\n", bench->name);
370
371 state.producers = calloc(env.producer_cnt, sizeof(*state.producers));
372 state.consumers = calloc(env.consumer_cnt, sizeof(*state.consumers));
373 state.results = calloc(env.duration_sec + env.warmup_sec + 2,
374 sizeof(*state.results));
375 if (!state.producers || !state.consumers || !state.results)
376 exit(1);
377
378 if (bench->validate)
379 bench->validate();
380 if (bench->setup)
381 bench->setup();
382
383 for (i = 0; i < env.consumer_cnt; i++) {
384 err = pthread_create(&state.consumers[i], NULL,
385 bench->consumer_thread, (void *)(long)i);
386 if (err) {
387 fprintf(stderr, "failed to create consumer thread #%d: %d\n",
388 i, -errno);
389 exit(1);
390 }
391 if (env.affinity)
392 set_thread_affinity(state.consumers[i],
393 next_cpu(&env.cons_cpus));
394 }
395
396
397
398
399 if (!env.prod_cpus.cpus)
400 env.prod_cpus.next_cpu = env.cons_cpus.next_cpu;
401
402 for (i = 0; i < env.producer_cnt; i++) {
403 err = pthread_create(&state.producers[i], NULL,
404 bench->producer_thread, (void *)(long)i);
405 if (err) {
406 fprintf(stderr, "failed to create producer thread #%d: %d\n",
407 i, -errno);
408 exit(1);
409 }
410 if (env.affinity)
411 set_thread_affinity(state.producers[i],
412 next_cpu(&env.prod_cpus));
413 }
414
415 printf("Benchmark '%s' started.\n", bench->name);
416}
417
418static pthread_mutex_t bench_done_mtx = PTHREAD_MUTEX_INITIALIZER;
419static pthread_cond_t bench_done = PTHREAD_COND_INITIALIZER;
420
421static void collect_measurements(long delta_ns) {
422 int iter = state.res_cnt++;
423 struct bench_res *res = &state.results[iter];
424
425 bench->measure(res);
426
427 if (bench->report_progress)
428 bench->report_progress(iter, res, delta_ns);
429
430 if (iter == env.duration_sec + env.warmup_sec) {
431 pthread_mutex_lock(&bench_done_mtx);
432 pthread_cond_signal(&bench_done);
433 pthread_mutex_unlock(&bench_done_mtx);
434 }
435}
436
437int main(int argc, char **argv)
438{
439 parse_cmdline_args(argc, argv);
440
441 if (env.list) {
442 int i;
443
444 printf("Available benchmarks:\n");
445 for (i = 0; i < ARRAY_SIZE(benchs); i++) {
446 printf("- %s\n", benchs[i]->name);
447 }
448 return 0;
449 }
450
451 setup_benchmark();
452
453 setup_timer();
454
455 pthread_mutex_lock(&bench_done_mtx);
456 pthread_cond_wait(&bench_done, &bench_done_mtx);
457 pthread_mutex_unlock(&bench_done_mtx);
458
459 if (bench->report_final)
460
461 bench->report_final(state.results + env.warmup_sec,
462 state.res_cnt - env.warmup_sec);
463
464 return 0;
465}
466
