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