tools/testing/selftests/bpf/progs/pyperf600.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/bpf/progs/pyperf600.c

Extension

.c

Size

421 bytes

Lines

13

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.

Dependency Surface

• pyperf.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Facebook
#define STACK_MAX_LEN 600
/* Full unroll of 600 iterations will have total
 * program size close to 298k insns and this may
 * cause BPF_JMP insn out of 16-bit integer range.
 * So limit the unroll size to 150 so the
 * total program size is around 80k insns but
 * the loop will still execute 600 times.
 */
#define UNROLL_COUNT 150
#include "pyperf.h"

Annotation

• Immediate include surface: `pyperf.h`.
• 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.