tools/testing/selftests/sched_ext/init_enable_count.bpf.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/sched_ext/init_enable_count.bpf.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/sched_ext/init_enable_count.bpf.c
Extension
.c
Size
1308 bytes
Lines
54
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <scx/common.bpf.h>

char _license[] SEC("license") = "GPL";

u64 init_task_cnt, exit_task_cnt, enable_cnt, disable_cnt;
u64 init_fork_cnt, init_transition_cnt;

s32 BPF_STRUCT_OPS_SLEEPABLE(cnt_init_task, struct task_struct *p,
			     struct scx_init_task_args *args)
{
	__sync_fetch_and_add(&init_task_cnt, 1);

	if (args->fork)
		__sync_fetch_and_add(&init_fork_cnt, 1);
	else
		__sync_fetch_and_add(&init_transition_cnt, 1);

	return 0;
}

void BPF_STRUCT_OPS(cnt_exit_task, struct task_struct *p)
{
	__sync_fetch_and_add(&exit_task_cnt, 1);
}

void BPF_STRUCT_OPS(cnt_enable, struct task_struct *p)
{
	__sync_fetch_and_add(&enable_cnt, 1);
}

void BPF_STRUCT_OPS(cnt_disable, struct task_struct *p)
{
	__sync_fetch_and_add(&disable_cnt, 1);
}

SEC(".struct_ops.link")
struct sched_ext_ops init_enable_count_ops = {
	.init_task	= (void *) cnt_init_task,
	.exit_task	= (void *) cnt_exit_task,
	.enable		= (void *) cnt_enable,
	.disable	= (void *) cnt_disable,
	.name		= "init_enable_count",
};

Annotation

Implementation Notes