tools/tracing/rtla/example/timerlat_bpf_action.c

File Facts

System

Linux kernel

Corpus path

tools/tracing/rtla/example/timerlat_bpf_action.c

Extension

.c

Size

413 bytes

Lines

17

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.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bpf.h
• bpf/bpf_tracing.h

Detected Declarations

• struct trace_event_raw_timerlat_sample
• function action_handler

Annotated Snippet

struct trace_event_raw_timerlat_sample {
	unsigned long long timer_latency;
} __attribute__((preserve_access_index));

SEC("tp/timerlat_action")
int action_handler(struct trace_event_raw_timerlat_sample *tp_args)
{
	bpf_printk("Latency: %lld\n", tp_args->timer_latency);
	return 0;
}

Annotation

• Immediate include surface: `linux/bpf.h`, `bpf/bpf_tracing.h`.
• Detected declarations: `struct trace_event_raw_timerlat_sample`, `function action_handler`.
• Atlas domain: Support Tooling And Documentation / tools.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.