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/sched_balance_rq") 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