| // SPDX-License-Identifier: GPL-2.0 | |
| /* Copyright (c) 2021 Facebook */ | |
| #include "vmlinux.h" | |
| #include <bpf/bpf_helpers.h> | |
| char _license[] SEC("license") = "GPL"; | |
| u32 nr_loops; | |
| long hits; | |
| static int empty_callback(__u32 index, void *data) | |
| { | |
| return 0; | |
| } | |
| SEC("fentry/__x64_sys_getpgid") | |
| int benchmark(void *ctx) | |
| { | |
| for (int i = 0; i < 1000; i++) { | |
| bpf_loop(nr_loops, empty_callback, NULL, 0); | |
| __sync_add_and_fetch(&hits, nr_loops); | |
| } | |
| return 0; | |
| } |