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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2026 Meta Platforms, Inc. and affiliates. */
#include <argp.h>
#include "bench.h"
#include "bpf_for_bench.skel.h"
/* BPF triggering benchmarks */
static struct ctx {
struct bpf_for_bench *skel;
} ctx;
static struct {
__u32 nr_loops;
} args = {
/*
* Default to a large loop count so the per-iteration bpf_iter_num_next() cost dominates
* the one-time bpf_iter_num_new()/destroy() setup and teardown.
*/
.nr_loops = 1000,
};
enum {
ARG_NR_LOOPS = 4000,
};
static const struct argp_option opts[] = {
{ "nr_loops", ARG_NR_LOOPS, "nr_loops", 0,
"Set number of iterations for the bpf_for() loop"},
{},
};
static error_t parse_arg(int key, char *arg, struct argp_state *state)
{
switch (key) {
case ARG_NR_LOOPS:
args.nr_loops = strtol(arg, NULL, 10);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* exported into benchmark runner */
const struct argp bench_bpf_for_argp = {
.options = opts,
.parser = parse_arg,
};
static void validate(void)
{
if (env.consumer_cnt != 0) {
fprintf(stderr, "benchmark doesn't support consumer!\n");
exit(1);
}
}
static void *producer(void *input)
{
while (true)
/* trigger the bpf program */
syscall(__NR_getpgid);
return NULL;
}
static void measure(struct bench_res *res)
{
res->hits = atomic_swap(&ctx.skel->bss->hits, 0);
}
static void setup(void)
{
struct bpf_link *link;
setup_libbpf();
ctx.skel = bpf_for_bench__open_and_load();
if (!ctx.skel) {
fprintf(stderr, "failed to open skeleton\n");
exit(1);
}
link = bpf_program__attach(ctx.skel->progs.benchmark);
if (!link) {
fprintf(stderr, "failed to attach program!\n");
exit(1);
}
ctx.skel->bss->nr_loops = args.nr_loops;
}
const struct bench bench_bpf_for = {
.name = "bpf-for",
.argp = &bench_bpf_for_argp,
.validate = validate,
.setup = setup,
.producer_thread = producer,
.measure = measure,
.report_progress = ops_report_progress,
.report_final = ops_report_final,
};
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