tools/perf/tests/expand-cgroup.c

Source file repositories/reference/linux-study-clean/tools/perf/tests/expand-cgroup.c

File Facts

System
Linux kernel
Corpus path
tools/perf/tests/expand-cgroup.c
Extension
.c
Size
5179 bytes
Lines
216
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

if (ev_name[i] == NULL) {
			pr_debug("memory allocation failure\n");
			goto out;
		}
		i++;
	}
	/* remember grouping info */
	was_group_event = evsel__is_group_event(evlist__first(evlist));
	nr_members = evlist__first(evlist)->core.nr_members;

	ret = evlist__expand_cgroup(evlist, cgrp_str, false);
	if (ret < 0) {
		pr_debug("failed to expand events for cgroups\n");
		goto out;
	}

	ret = TEST_FAIL;
	if (evlist->core.nr_entries != nr_events * nr_cgrps) {
		pr_debug("event count doesn't match\n");
		goto out;
	}

	i = 0;
	evlist__for_each_entry(evlist, evsel) {
		if (!evsel__name_is(evsel, ev_name[i % nr_events])) {
			pr_debug("event name doesn't match:\n");
			pr_debug("  evsel[%d]: %s\n  expected: %s\n",
				 i, evsel->name, ev_name[i % nr_events]);
			goto out;
		}
		if (strcmp(evsel->cgrp->name, cgrp_name[i / nr_events])) {
			pr_debug("cgroup name doesn't match:\n");
			pr_debug("  evsel[%d]: %s\n  expected: %s\n",
				 i, evsel->cgrp->name, cgrp_name[i / nr_events]);
			goto out;
		}

		if ((i % nr_events) == 0) {
			if (evsel__is_group_event(evsel) != was_group_event) {
				pr_debug("event group doesn't match: got %s, expect %s\n",
					 evsel__is_group_event(evsel) ? "true" : "false",
					 was_group_event ? "true" : "false");
				goto out;
			}
			if (evsel->core.nr_members != nr_members) {
				pr_debug("event group member doesn't match: %d vs %d\n",
					 evsel->core.nr_members, nr_members);
				goto out;
			}
		}
		i++;
	}
	ret = TEST_OK;

out:	for (i = 0; i < nr_events; i++)
		free(ev_name[i]);
	free(ev_name);
	return ret;
}

static int expand_default_events(void)
{
	int ret;
	struct target target = {};
	struct evlist *evlist = evlist__new_default(&target, /*sample_callchains=*/false);

	TEST_ASSERT_VAL("failed to get evlist", evlist);

	ret = test_expand_events(evlist);
	evlist__delete(evlist);
	return ret;
}

static int expand_group_events(void)
{
	int ret;
	struct evlist *evlist;
	struct parse_events_error err;
	const char event_str[] = "{cycles,instructions}";

	symbol_conf.event_group = true;

	evlist = evlist__new();
	TEST_ASSERT_VAL("failed to get evlist", evlist);

	parse_events_error__init(&err);
	ret = parse_events(evlist, event_str, &err);
	if (ret < 0) {
		pr_debug("failed to parse event '%s', err %d\n", event_str, ret);
		parse_events_error__print(&err, event_str);

Annotation

Implementation Notes