1// SPDX-License-Identifier: GPL-2.0 2/* Copyright (c) 2021 Facebook */ 3 4#include "vmlinux.h" 5#include <bpf/bpf_helpers.h> 6#include "bpf_misc.h" 7 8char _license[] SEC("license") = "GPL"; 9 10u32 nr_loops; 11long hits; 12 13static int empty_callback(__u32 index, void *data) 14{ 15 return 0; 16} 17 18static int outer_loop(__u32 index, void *data) 19{ 20 bpf_loop(nr_loops, empty_callback, NULL, 0); 21 __sync_add_and_fetch(&hits, nr_loops); 22 return 0; 23} 24 25SEC("fentry/" SYS_PREFIX "sys_getpgid") 26int benchmark(void *ctx) 27{ 28 bpf_loop(1000, outer_loop, NULL, 0); 29 return 0; 30} 31