1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * A scheduler that verifies that we do proper counting of init, enable, etc
4 * callbacks.
5 *
6 * Copyright (c) 2023 Meta Platforms, Inc. and affiliates.
7 * Copyright (c) 2023 David Vernet <dvernet@meta.com>
8 * Copyright (c) 2023 Tejun Heo <tj@kernel.org>
9 */
10
11 #include <scx/common.bpf.h>
12
13 char _license[] SEC("license") = "GPL";
14
15 u64 init_task_cnt, exit_task_cnt, enable_cnt, disable_cnt;
16 u64 init_fork_cnt, init_transition_cnt;
17
18 s32 BPF_STRUCT_OPS_SLEEPABLE(cnt_init_task, struct task_struct *p,
19 struct scx_init_task_args *args)
20 {
21 __sync_fetch_and_add(&init_task_cnt, 1);
22
23 if (args->fork)
24 __sync_fetch_and_add(&init_fork_cnt, 1);
25 else
26 __sync_fetch_and_add(&init_transition_cnt, 1);
27
28 return 0;
29 }
30
31 void BPF_STRUCT_OPS(cnt_exit_task, struct task_struct *p)
32 {
33 __sync_fetch_and_add(&exit_task_cnt, 1);
34 }
35
36 void BPF_STRUCT_OPS(cnt_enable, struct task_struct *p)
37 {
38 __sync_fetch_and_add(&enable_cnt, 1);
39 }
40
41 void BPF_STRUCT_OPS(cnt_disable, struct task_struct *p)
42 {
43 __sync_fetch_and_add(&disable_cnt, 1);
44 }
45
46 SEC(".struct_ops.link")
47 struct sched_ext_ops init_enable_count_ops = {
48 .init_task = (void *) cnt_init_task,
49 .exit_task = (void *) cnt_exit_task,
50 .enable = (void *) cnt_enable,
51 .disable = (void *) cnt_disable,
52 .name = "init_enable_count",
53 };
54
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