tools/perf/tests/time-utils-test.c

Source file repositories/reference/linux-study-clean/tools/perf/tests/time-utils-test.c

File Facts

System
Linux kernel
Corpus path
tools/perf/tests/time-utils-test.c
Extension
.c
Size
6174 bytes
Lines
254
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

struct test_data {
	const char *str;
	u64 first;
	u64 last;
	struct perf_time_interval ptime[TEST_MAX];
	int num;
	u64 skip[TEST_MAX];
	u64 noskip[TEST_MAX];
};

static bool test__perf_time__parse_for_ranges(struct test_data *d)
{
	struct evlist evlist = {
		.first_sample_time = d->first,
		.last_sample_time = d->last,
	};
	struct perf_session session = { .evlist = &evlist };
	struct perf_time_interval *ptime = NULL;
	int range_size, range_num;
	bool pass = false;
	int i, err;

	pr_debug("\nperf_time__parse_for_ranges(\"%s\")\n", d->str);

	if (strchr(d->str, '%'))
		pr_debug("first_sample_time %" PRIu64 " last_sample_time %" PRIu64 "\n",
			 d->first, d->last);

	err = perf_time__parse_for_ranges(d->str, &session, &ptime, &range_size,
					  &range_num);
	if (err) {
		pr_debug("error %d\n", err);
		goto out;
	}

	if (range_size < d->num || range_num != d->num) {
		pr_debug("bad size: range_size %d range_num %d expected num %d\n",
			 range_size, range_num, d->num);
		goto out;
	}

	for (i = 0; i < d->num; i++) {
		if (ptime[i].start != d->ptime[i].start ||
		    ptime[i].end != d->ptime[i].end) {
			pr_debug("bad range %d expected %" PRIu64 " to %" PRIu64 "\n",
				 i, d->ptime[i].start, d->ptime[i].end);
			goto out;
		}
	}

	if (perf_time__ranges_skip_sample(ptime, d->num, 0)) {
		pr_debug("failed to keep 0\n");
		goto out;
	}

	for (i = 0; i < TEST_MAX; i++) {
		if (d->skip[i] &&
		    !perf_time__ranges_skip_sample(ptime, d->num, d->skip[i])) {
			pr_debug("failed to skip %" PRIu64 "\n", d->skip[i]);
			goto out;
		}
		if (d->noskip[i] &&
		    perf_time__ranges_skip_sample(ptime, d->num, d->noskip[i])) {
			pr_debug("failed to keep %" PRIu64 "\n", d->noskip[i]);
			goto out;
		}
	}

	pass = true;
out:
	free(ptime);
	return pass;
}

static int test__time_utils(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
{
	bool pass = true;

	pass &= test__parse_nsec_time("0", 0);
	pass &= test__parse_nsec_time("1", 1000000000ULL);
	pass &= test__parse_nsec_time("0.000000001", 1);
	pass &= test__parse_nsec_time("1.000000001", 1000000001ULL);
	pass &= test__parse_nsec_time("123456.123456", 123456123456000ULL);
	pass &= test__parse_nsec_time("1234567.123456789", 1234567123456789ULL);
	pass &= test__parse_nsec_time("18446744073.709551615",
				      0xFFFFFFFFFFFFFFFFULL);

	pass &= test__perf_time__parse_str("1234567.123456789,1234567.123456789",
					   1234567123456789ULL, 1234567123456789ULL);
	pass &= test__perf_time__parse_str("1234567.123456789,1234567.123456790",

Annotation

Implementation Notes