tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.c

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.c
Extension
.c
Size
1471 bytes
Lines
60
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 <bpf/bpf.h>
#include <scx/common.h>
#include <unistd.h>
#include "ddsp_vtimelocal_fail.bpf.skel.h"
#include "scx_test.h"

static enum scx_test_status setup(void **ctx)
{
	struct ddsp_vtimelocal_fail *skel;

	skel = ddsp_vtimelocal_fail__open();
	SCX_FAIL_IF(!skel, "Failed to open");
	SCX_ENUM_INIT(skel);
	SCX_FAIL_IF(ddsp_vtimelocal_fail__load(skel), "Failed to load skel");

	*ctx = skel;

	return SCX_TEST_PASS;
}

static enum scx_test_status run(void *ctx)
{
	struct ddsp_vtimelocal_fail *skel = ctx;
	struct bpf_link *link;

	link = bpf_map__attach_struct_ops(skel->maps.ddsp_vtimelocal_fail_ops);
	SCX_FAIL_IF(!link, "Failed to attach struct_ops");

	sleep(1);

	SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_ERROR));
	bpf_link__destroy(link);

	return SCX_TEST_PASS;
}

static void cleanup(void *ctx)
{
	struct ddsp_vtimelocal_fail *skel = ctx;

	ddsp_vtimelocal_fail__destroy(skel);
}

struct scx_test ddsp_vtimelocal_fail = {
	.name = "ddsp_vtimelocal_fail",
	.description = "Verify we gracefully fail, and fall back to using a "
		       "built-in DSQ, if we do a direct vtime dispatch to a "
		       "built-in DSQ from DSQ in ops.select_cpu()",
	.setup = setup,
	.run = run,
	.cleanup = cleanup,
};
REGISTER_SCX_TEST(&ddsp_vtimelocal_fail)

Annotation

Implementation Notes