1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
4 */
5
6 #include <scx/common.bpf.h>
7
8 char _license[] SEC("license") = "GPL";
9
10 u64 vtime_test;
11
12 void BPF_STRUCT_OPS(maybe_null_running, struct task_struct *p)
13 {}
14
15 void BPF_STRUCT_OPS(maybe_null_success_dispatch, s32 cpu, struct task_struct *p)
16 {
17 if (p != NULL)
18 vtime_test = p->scx.dsq_vtime;
19 }
20
21 bool BPF_STRUCT_OPS(maybe_null_success_yield, struct task_struct *from,
22 struct task_struct *to)
23 {
24 if (to)
25 bpf_printk("Yielding to %s[%d]", to->comm, to->pid);
26
27 return false;
28 }
29
30 SEC(".struct_ops.link")
31 struct sched_ext_ops maybe_null_success = {
32 .dispatch = (void *) maybe_null_success_dispatch,
33 .yield = (void *) maybe_null_success_yield,
34 .enable = (void *) maybe_null_running,
35 .name = "minimal",
36 };
37
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.