1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2017 Facebook
3 
4 #include <linux/bpf.h>
5 #include <bpf/bpf_helpers.h>
6 
7 /* taken from /sys/kernel/debug/tracing/events/sched/sched_switch/format */
8 struct sched_switch_args {
9 	unsigned long long pad;
10 	char prev_comm[16];
11 	int prev_pid;
12 	int prev_prio;
13 	long long prev_state;
14 	char next_comm[16];
15 	int next_pid;
16 	int next_prio;
17 };
18 
19 SEC("tracepoint/sched/sched_switch")
20 int oncpu(struct sched_switch_args *ctx)
21 {
22 	return 0;
23 }
24 
25 char _license[] SEC("license") = "GPL";
26 __u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */
27