1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2023 Bytedance */
3 
4 #include "vmlinux.h"
5 #include <bpf/bpf_helpers.h>
6 #include <bpf/bpf_tracing.h>
7 
8 unsigned long span = 0;
9 
10 SEC("fentry/load_balance")
11 int BPF_PROG(fentry_fentry, int this_cpu, struct rq *this_rq,
12 		struct sched_domain *sd)
13 {
14 	span = sd->span[0];
15 
16 	return 0;
17 }
18 
19 char _license[] SEC("license") = "GPL";
20