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1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2021 Facebook */3 4#include <argp.h>5#include "bench.h"6#include "bpf_loop_bench.skel.h"7 8/* BPF triggering benchmarks */9static struct ctx {10 struct bpf_loop_bench *skel;11} ctx;12 13static struct {14 __u32 nr_loops;15} args = {16 .nr_loops = 10,17};18 19enum {20 ARG_NR_LOOPS = 4000,21};22 23static const struct argp_option opts[] = {24 { "nr_loops", ARG_NR_LOOPS, "nr_loops", 0,25 "Set number of loops for the bpf_loop helper"},26 {},27};28 29static error_t parse_arg(int key, char *arg, struct argp_state *state)30{31 switch (key) {32 case ARG_NR_LOOPS:33 args.nr_loops = strtol(arg, NULL, 10);34 break;35 default:36 return ARGP_ERR_UNKNOWN;37 }38 39 return 0;40}41 42/* exported into benchmark runner */43const struct argp bench_bpf_loop_argp = {44 .options = opts,45 .parser = parse_arg,46};47 48static void validate(void)49{50 if (env.consumer_cnt != 0) {51 fprintf(stderr, "benchmark doesn't support consumer!\n");52 exit(1);53 }54}55 56static void *producer(void *input)57{58 while (true)59 /* trigger the bpf program */60 syscall(__NR_getpgid);61 62 return NULL;63}64 65static void measure(struct bench_res *res)66{67 res->hits = atomic_swap(&ctx.skel->bss->hits, 0);68}69 70static void setup(void)71{72 struct bpf_link *link;73 74 setup_libbpf();75 76 ctx.skel = bpf_loop_bench__open_and_load();77 if (!ctx.skel) {78 fprintf(stderr, "failed to open skeleton\n");79 exit(1);80 }81 82 link = bpf_program__attach(ctx.skel->progs.benchmark);83 if (!link) {84 fprintf(stderr, "failed to attach program!\n");85 exit(1);86 }87 88 ctx.skel->bss->nr_loops = args.nr_loops;89}90 91const struct bench bench_bpf_loop = {92 .name = "bpf-loop",93 .argp = &bench_bpf_loop_argp,94 .validate = validate,95 .setup = setup,96 .producer_thread = producer,97 .measure = measure,98 .report_progress = ops_report_progress,99 .report_final = ops_report_final,100};101