107 lines
1.9 KiB
C
107 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2021 Facebook */
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#include <argp.h>
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#include "bench.h"
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#include "bpf_loop_bench.skel.h"
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/* BPF triggering benchmarks */
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static struct ctx {
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struct bpf_loop_bench *skel;
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} ctx;
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static struct {
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__u32 nr_loops;
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} args = {
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.nr_loops = 10,
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};
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enum {
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ARG_NR_LOOPS = 4000,
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};
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static const struct argp_option opts[] = {
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{ "nr_loops", ARG_NR_LOOPS, "nr_loops", 0,
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"Set number of loops for the bpf_loop helper"},
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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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switch (key) {
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case ARG_NR_LOOPS:
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args.nr_loops = strtol(arg, NULL, 10);
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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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/* exported into benchmark runner */
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const struct argp bench_bpf_loop_argp = {
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.options = opts,
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.parser = parse_arg,
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};
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static void validate(void)
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{
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if (env.consumer_cnt != 1) {
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fprintf(stderr, "benchmark doesn't support multi-consumer!\n");
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exit(1);
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}
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}
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static void *producer(void *input)
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{
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while (true)
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/* trigger the bpf program */
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syscall(__NR_getpgid);
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return NULL;
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}
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static void *consumer(void *input)
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{
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return NULL;
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}
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static void measure(struct bench_res *res)
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{
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res->hits = atomic_swap(&ctx.skel->bss->hits, 0);
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}
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static void setup(void)
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{
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struct bpf_link *link;
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setup_libbpf();
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ctx.skel = bpf_loop_bench__open_and_load();
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if (!ctx.skel) {
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fprintf(stderr, "failed to open skeleton\n");
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exit(1);
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}
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link = bpf_program__attach(ctx.skel->progs.benchmark);
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if (!link) {
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fprintf(stderr, "failed to attach program!\n");
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exit(1);
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}
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ctx.skel->bss->nr_loops = args.nr_loops;
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}
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const struct bench bench_bpf_loop = {
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.name = "bpf-loop",
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.argp = &bench_bpf_loop_argp,
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.validate = validate,
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.setup = setup,
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.producer_thread = producer,
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.consumer_thread = consumer,
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.measure = measure,
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.report_progress = ops_report_progress,
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.report_final = ops_report_final,
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};
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