mirror of https://gitee.com/openkylin/linux.git
466 lines
12 KiB
C
466 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#define _GNU_SOURCE
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#include <argp.h>
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#include <linux/compiler.h>
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#include <sys/time.h>
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#include <sched.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <sys/sysinfo.h>
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#include <sys/resource.h>
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#include <signal.h>
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#include "bench.h"
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#include "testing_helpers.h"
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struct env env = {
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.warmup_sec = 1,
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.duration_sec = 5,
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.affinity = false,
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.consumer_cnt = 1,
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.producer_cnt = 1,
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};
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static int libbpf_print_fn(enum libbpf_print_level level,
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const char *format, va_list args)
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{
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if (level == LIBBPF_DEBUG && !env.verbose)
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return 0;
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return vfprintf(stderr, format, args);
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}
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static int bump_memlock_rlimit(void)
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{
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struct rlimit rlim_new = {
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.rlim_cur = RLIM_INFINITY,
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.rlim_max = RLIM_INFINITY,
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};
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return setrlimit(RLIMIT_MEMLOCK, &rlim_new);
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}
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void setup_libbpf()
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{
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int err;
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libbpf_set_print(libbpf_print_fn);
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err = bump_memlock_rlimit();
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if (err)
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fprintf(stderr, "failed to increase RLIMIT_MEMLOCK: %d", err);
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}
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void hits_drops_report_progress(int iter, struct bench_res *res, long delta_ns)
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{
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double hits_per_sec, drops_per_sec;
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double hits_per_prod;
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hits_per_sec = res->hits / 1000000.0 / (delta_ns / 1000000000.0);
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hits_per_prod = hits_per_sec / env.producer_cnt;
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drops_per_sec = res->drops / 1000000.0 / (delta_ns / 1000000000.0);
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printf("Iter %3d (%7.3lfus): ",
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iter, (delta_ns - 1000000000) / 1000.0);
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printf("hits %8.3lfM/s (%7.3lfM/prod), drops %8.3lfM/s\n",
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hits_per_sec, hits_per_prod, drops_per_sec);
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}
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void hits_drops_report_final(struct bench_res res[], int res_cnt)
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{
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int i;
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double hits_mean = 0.0, drops_mean = 0.0;
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double hits_stddev = 0.0, drops_stddev = 0.0;
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for (i = 0; i < res_cnt; i++) {
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hits_mean += res[i].hits / 1000000.0 / (0.0 + res_cnt);
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drops_mean += res[i].drops / 1000000.0 / (0.0 + res_cnt);
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}
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if (res_cnt > 1) {
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for (i = 0; i < res_cnt; i++) {
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hits_stddev += (hits_mean - res[i].hits / 1000000.0) *
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(hits_mean - res[i].hits / 1000000.0) /
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(res_cnt - 1.0);
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drops_stddev += (drops_mean - res[i].drops / 1000000.0) *
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(drops_mean - res[i].drops / 1000000.0) /
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(res_cnt - 1.0);
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}
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hits_stddev = sqrt(hits_stddev);
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drops_stddev = sqrt(drops_stddev);
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}
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printf("Summary: hits %8.3lf \u00B1 %5.3lfM/s (%7.3lfM/prod), ",
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hits_mean, hits_stddev, hits_mean / env.producer_cnt);
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printf("drops %8.3lf \u00B1 %5.3lfM/s\n",
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drops_mean, drops_stddev);
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}
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const char *argp_program_version = "benchmark";
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const char *argp_program_bug_address = "<bpf@vger.kernel.org>";
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const char argp_program_doc[] =
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"benchmark Generic benchmarking framework.\n"
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"\n"
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"This tool runs benchmarks.\n"
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"\n"
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"USAGE: benchmark <bench-name>\n"
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"\n"
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"EXAMPLES:\n"
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" # run 'count-local' benchmark with 1 producer and 1 consumer\n"
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" benchmark count-local\n"
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" # run 'count-local' with 16 producer and 8 consumer thread, pinned to CPUs\n"
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" benchmark -p16 -c8 -a count-local\n";
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enum {
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ARG_PROD_AFFINITY_SET = 1000,
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ARG_CONS_AFFINITY_SET = 1001,
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};
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static const struct argp_option opts[] = {
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{ "list", 'l', NULL, 0, "List available benchmarks"},
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{ "duration", 'd', "SEC", 0, "Duration of benchmark, seconds"},
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{ "warmup", 'w', "SEC", 0, "Warm-up period, seconds"},
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{ "producers", 'p', "NUM", 0, "Number of producer threads"},
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{ "consumers", 'c', "NUM", 0, "Number of consumer threads"},
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{ "verbose", 'v', NULL, 0, "Verbose debug output"},
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{ "affinity", 'a', NULL, 0, "Set consumer/producer thread affinity"},
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{ "prod-affinity", ARG_PROD_AFFINITY_SET, "CPUSET", 0,
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"Set of CPUs for producer threads; implies --affinity"},
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{ "cons-affinity", ARG_CONS_AFFINITY_SET, "CPUSET", 0,
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"Set of CPUs for consumer threads; implies --affinity"},
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{},
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};
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extern struct argp bench_ringbufs_argp;
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static const struct argp_child bench_parsers[] = {
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{ &bench_ringbufs_argp, 0, "Ring buffers benchmark", 0 },
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{},
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};
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static error_t parse_arg(int key, char *arg, struct argp_state *state)
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{
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static int pos_args;
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switch (key) {
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case 'v':
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env.verbose = true;
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break;
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case 'l':
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env.list = true;
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break;
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case 'd':
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env.duration_sec = strtol(arg, NULL, 10);
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if (env.duration_sec <= 0) {
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fprintf(stderr, "Invalid duration: %s\n", arg);
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argp_usage(state);
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}
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break;
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case 'w':
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env.warmup_sec = strtol(arg, NULL, 10);
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if (env.warmup_sec <= 0) {
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fprintf(stderr, "Invalid warm-up duration: %s\n", arg);
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argp_usage(state);
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}
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break;
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case 'p':
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env.producer_cnt = strtol(arg, NULL, 10);
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if (env.producer_cnt <= 0) {
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fprintf(stderr, "Invalid producer count: %s\n", arg);
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argp_usage(state);
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}
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break;
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case 'c':
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env.consumer_cnt = strtol(arg, NULL, 10);
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if (env.consumer_cnt <= 0) {
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fprintf(stderr, "Invalid consumer count: %s\n", arg);
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argp_usage(state);
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}
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break;
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case 'a':
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env.affinity = true;
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break;
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case ARG_PROD_AFFINITY_SET:
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env.affinity = true;
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if (parse_num_list(arg, &env.prod_cpus.cpus,
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&env.prod_cpus.cpus_len)) {
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fprintf(stderr, "Invalid format of CPU set for producers.");
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argp_usage(state);
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}
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break;
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case ARG_CONS_AFFINITY_SET:
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env.affinity = true;
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if (parse_num_list(arg, &env.cons_cpus.cpus,
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&env.cons_cpus.cpus_len)) {
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fprintf(stderr, "Invalid format of CPU set for consumers.");
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argp_usage(state);
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}
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break;
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case ARGP_KEY_ARG:
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if (pos_args++) {
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fprintf(stderr,
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"Unrecognized positional argument: %s\n", arg);
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argp_usage(state);
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}
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env.bench_name = strdup(arg);
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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static void parse_cmdline_args(int argc, char **argv)
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{
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static const struct argp argp = {
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.options = opts,
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.parser = parse_arg,
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.doc = argp_program_doc,
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.children = bench_parsers,
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};
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if (argp_parse(&argp, argc, argv, 0, NULL, NULL))
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exit(1);
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if (!env.list && !env.bench_name) {
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argp_help(&argp, stderr, ARGP_HELP_DOC, "bench");
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exit(1);
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}
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}
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static void collect_measurements(long delta_ns);
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static __u64 last_time_ns;
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static void sigalarm_handler(int signo)
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{
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long new_time_ns = get_time_ns();
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long delta_ns = new_time_ns - last_time_ns;
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collect_measurements(delta_ns);
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last_time_ns = new_time_ns;
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}
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/* set up periodic 1-second timer */
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static void setup_timer()
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{
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static struct sigaction sigalarm_action = {
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.sa_handler = sigalarm_handler,
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};
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struct itimerval timer_settings = {};
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int err;
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last_time_ns = get_time_ns();
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err = sigaction(SIGALRM, &sigalarm_action, NULL);
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if (err < 0) {
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fprintf(stderr, "failed to install SIGALRM handler: %d\n", -errno);
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exit(1);
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}
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timer_settings.it_interval.tv_sec = 1;
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timer_settings.it_value.tv_sec = 1;
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err = setitimer(ITIMER_REAL, &timer_settings, NULL);
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if (err < 0) {
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fprintf(stderr, "failed to arm interval timer: %d\n", -errno);
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exit(1);
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}
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}
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static void set_thread_affinity(pthread_t thread, int cpu)
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{
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cpu_set_t cpuset;
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CPU_ZERO(&cpuset);
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CPU_SET(cpu, &cpuset);
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if (pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset)) {
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fprintf(stderr, "setting affinity to CPU #%d failed: %d\n",
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cpu, errno);
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exit(1);
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}
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}
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static int next_cpu(struct cpu_set *cpu_set)
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{
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if (cpu_set->cpus) {
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int i;
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/* find next available CPU */
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for (i = cpu_set->next_cpu; i < cpu_set->cpus_len; i++) {
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if (cpu_set->cpus[i]) {
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cpu_set->next_cpu = i + 1;
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return i;
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}
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}
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fprintf(stderr, "Not enough CPUs specified, need CPU #%d or higher.\n", i);
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exit(1);
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}
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return cpu_set->next_cpu++;
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}
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static struct bench_state {
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int res_cnt;
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struct bench_res *results;
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pthread_t *consumers;
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pthread_t *producers;
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} state;
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const struct bench *bench = NULL;
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extern const struct bench bench_count_global;
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extern const struct bench bench_count_local;
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extern const struct bench bench_rename_base;
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extern const struct bench bench_rename_kprobe;
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extern const struct bench bench_rename_kretprobe;
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extern const struct bench bench_rename_rawtp;
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extern const struct bench bench_rename_fentry;
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extern const struct bench bench_rename_fexit;
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extern const struct bench bench_rename_fmodret;
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extern const struct bench bench_trig_base;
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extern const struct bench bench_trig_tp;
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extern const struct bench bench_trig_rawtp;
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extern const struct bench bench_trig_kprobe;
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extern const struct bench bench_trig_fentry;
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extern const struct bench bench_trig_fmodret;
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extern const struct bench bench_rb_libbpf;
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extern const struct bench bench_rb_custom;
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extern const struct bench bench_pb_libbpf;
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extern const struct bench bench_pb_custom;
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static const struct bench *benchs[] = {
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&bench_count_global,
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&bench_count_local,
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&bench_rename_base,
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&bench_rename_kprobe,
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&bench_rename_kretprobe,
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&bench_rename_rawtp,
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&bench_rename_fentry,
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&bench_rename_fexit,
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&bench_rename_fmodret,
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&bench_trig_base,
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&bench_trig_tp,
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&bench_trig_rawtp,
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&bench_trig_kprobe,
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&bench_trig_fentry,
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&bench_trig_fmodret,
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&bench_rb_libbpf,
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&bench_rb_custom,
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&bench_pb_libbpf,
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&bench_pb_custom,
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};
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static void setup_benchmark()
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{
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int i, err;
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if (!env.bench_name) {
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fprintf(stderr, "benchmark name is not specified\n");
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exit(1);
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}
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for (i = 0; i < ARRAY_SIZE(benchs); i++) {
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if (strcmp(benchs[i]->name, env.bench_name) == 0) {
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bench = benchs[i];
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break;
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}
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}
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if (!bench) {
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fprintf(stderr, "benchmark '%s' not found\n", env.bench_name);
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exit(1);
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}
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printf("Setting up benchmark '%s'...\n", bench->name);
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state.producers = calloc(env.producer_cnt, sizeof(*state.producers));
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state.consumers = calloc(env.consumer_cnt, sizeof(*state.consumers));
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state.results = calloc(env.duration_sec + env.warmup_sec + 2,
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sizeof(*state.results));
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if (!state.producers || !state.consumers || !state.results)
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exit(1);
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if (bench->validate)
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bench->validate();
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if (bench->setup)
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bench->setup();
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for (i = 0; i < env.consumer_cnt; i++) {
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err = pthread_create(&state.consumers[i], NULL,
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bench->consumer_thread, (void *)(long)i);
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if (err) {
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fprintf(stderr, "failed to create consumer thread #%d: %d\n",
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i, -errno);
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exit(1);
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}
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if (env.affinity)
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set_thread_affinity(state.consumers[i],
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next_cpu(&env.cons_cpus));
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}
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/* unless explicit producer CPU list is specified, continue after
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* last consumer CPU
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*/
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if (!env.prod_cpus.cpus)
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env.prod_cpus.next_cpu = env.cons_cpus.next_cpu;
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for (i = 0; i < env.producer_cnt; i++) {
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err = pthread_create(&state.producers[i], NULL,
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bench->producer_thread, (void *)(long)i);
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if (err) {
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fprintf(stderr, "failed to create producer thread #%d: %d\n",
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i, -errno);
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exit(1);
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}
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if (env.affinity)
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set_thread_affinity(state.producers[i],
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next_cpu(&env.prod_cpus));
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}
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printf("Benchmark '%s' started.\n", bench->name);
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}
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static pthread_mutex_t bench_done_mtx = PTHREAD_MUTEX_INITIALIZER;
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static pthread_cond_t bench_done = PTHREAD_COND_INITIALIZER;
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static void collect_measurements(long delta_ns) {
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int iter = state.res_cnt++;
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struct bench_res *res = &state.results[iter];
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bench->measure(res);
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if (bench->report_progress)
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bench->report_progress(iter, res, delta_ns);
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if (iter == env.duration_sec + env.warmup_sec) {
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pthread_mutex_lock(&bench_done_mtx);
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pthread_cond_signal(&bench_done);
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pthread_mutex_unlock(&bench_done_mtx);
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}
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}
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int main(int argc, char **argv)
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{
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parse_cmdline_args(argc, argv);
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if (env.list) {
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int i;
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printf("Available benchmarks:\n");
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for (i = 0; i < ARRAY_SIZE(benchs); i++) {
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printf("- %s\n", benchs[i]->name);
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}
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return 0;
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}
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setup_benchmark();
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setup_timer();
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pthread_mutex_lock(&bench_done_mtx);
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pthread_cond_wait(&bench_done, &bench_done_mtx);
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pthread_mutex_unlock(&bench_done_mtx);
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if (bench->report_final)
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/* skip first sample */
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bench->report_final(state.results + env.warmup_sec,
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state.res_cnt - env.warmup_sec);
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return 0;
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}
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