tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_mmcra_sample_test.c
Source file repositories/reference/linux-study-clean/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_mmcra_sample_test.c
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_mmcra_sample_test.c- Extension
.c- Size
- 1285 bytes
- Lines
- 55
- 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
stdio.h../event.h../sampling_tests/misc.h
Detected Declarations
function group_constraint_mmcra_samplefunction main
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2022, Athira Rajeev, IBM Corp.
*/
#include <stdio.h>
#include "../event.h"
#include "../sampling_tests/misc.h"
#define EventCode_1 0x35340401e0
#define EventCode_2 0x353c0101ec
#define EventCode_3 0x35340101ec
/*
* Test that using different sample bits in
* event code cause failure in schedule for
* group of events.
*/
static int group_constraint_mmcra_sample(void)
{
struct event event, leader;
SKIP_IF(platform_check_for_tests());
/*
* Events with different "sample" field values
* in a group will fail to schedule.
* Use event with load only sampling mode as
* group leader. Use event with store only sampling
* as sibling event.
*/
event_init(&leader, EventCode_1);
FAIL_IF(event_open(&leader));
event_init(&event, EventCode_2);
/* Expected to fail as sibling event doesn't use same sampling bits as leader */
FAIL_IF(!event_open_with_group(&event, leader.fd));
event_init(&event, EventCode_3);
/* Expected to pass as sibling event use same sampling bits as leader */
FAIL_IF(event_open_with_group(&event, leader.fd));
event_close(&leader);
event_close(&event);
return 0;
}
int main(void)
{
return test_harness(group_constraint_mmcra_sample, "group_constraint_mmcra_sample");
}
Annotation
- Immediate include surface: `stdio.h`, `../event.h`, `../sampling_tests/misc.h`.
- Detected declarations: `function group_constraint_mmcra_sample`, `function main`.
- 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.