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perf tests: Test evsel__set_config_if_unset() and config change tracking

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Test that evsel__set_config_if_unset() behaves as expected. This also
tests the user config change tracking mechanism as it depends on it.

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark
2026-01-14 15:57:21 +00:00
committed by Arnaldo Carvalho de Melo
parent 6f87719b8a
commit 8e2ef85c66
1 changed files with 92 additions and 1 deletions
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93
tools/perf/tests/pmu.c
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@@ -192,7 +192,6 @@ static int test__pmu_format(struct test_suite *test __maybe_unused, int subtest
}
if (attr.config2 != 0x0400000020041d07) {
pr_err("Unexpected config2 value %llx\n", attr.config2);
goto err_out;
}
ret = TEST_OK;
@@ -202,6 +201,97 @@ err_out:
return ret;
}
static int test__pmu_usr_chgs(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
const char *event = "perf-pmu-test/config=15,config1=4,krava02=170,"
"krava03=1,krava11=27,krava12=1/";
struct parse_events_terms terms;
struct parse_events_error err;
LIST_HEAD(config_terms);
struct evlist *evlist;
struct perf_pmu *pmu;
struct evsel *evsel;
int ret = TEST_FAIL;
char dir[PATH_MAX];
u64 val;
pmu = test_pmu_get(dir, sizeof(dir));
if (!pmu)
return TEST_FAIL;
evlist = evlist__new();
if (evlist == NULL) {
pr_err("Failed allocation");
goto err_out;
}
parse_events_terms__init(&terms);
ret = parse_events(evlist, event, &err);
if (ret) {
pr_debug("failed to parse event '%s', err %d\n", event, ret);
parse_events_error__print(&err, event);
if (parse_events_error__contains(&err, "can't access trace events"))
ret = TEST_SKIP;
goto err_out;
}
evsel = evlist__first(evlist);
/*
* Set via config=15, krava01 bits 0-1
* Set via config1=4, krava11 bit 1
* Set values: krava02=170, krava03=1, krava11=27, krava12=1
*
* Test that already set values aren't overwritten.
*/
evsel__set_config_if_unset(evsel, "krava01", 16);
evsel__get_config_val(evsel, "krava01", &val);
TEST_ASSERT_EQUAL("krava01 overwritten", (int) val, (15 & 0b11));
evsel__set_config_if_unset(evsel, "krava11", 45);
evsel__get_config_val(evsel, "krava11", &val);
TEST_ASSERT_EQUAL("krava11 overwritten", (int) val, (27 | (4 << 1)));
evsel__set_config_if_unset(evsel, "krava02", 32);
evsel__get_config_val(evsel, "krava02", &val);
TEST_ASSERT_EQUAL("krava02 overwritten", (int) val, 170);
evsel__set_config_if_unset(evsel, "krava03", 0);
evsel__get_config_val(evsel, "krava03", &val);
TEST_ASSERT_EQUAL("krava03 overwritten", (int) val, 1);
/*
* krava13 doesn't have any bits set by either krava13= or config1=
* but setting _any_ raw value for config1 implies that krava13
* shouldn't be overwritten. So it's value should remain as 0.
*/
evsel__set_config_if_unset(evsel, "krava13", 5);
evsel__get_config_val(evsel, "krava13", &val);
TEST_ASSERT_EQUAL("krava13 overwritten", (int) val, 0);
/*
* Unset values: krava21, krava22, krava23
*
* Test that unset values are overwritten.
*/
evsel__set_config_if_unset(evsel, "krava21", 13905);
evsel__get_config_val(evsel, "krava21", &val);
TEST_ASSERT_EQUAL("krava21 not overwritten", (int) val, 13905);
evsel__set_config_if_unset(evsel, "krava22", 11);
evsel__get_config_val(evsel, "krava22", &val);
TEST_ASSERT_EQUAL("krava22 not overwritten", (int) val, 11);
evsel__set_config_if_unset(evsel, "krava23", 0);
evsel__get_config_val(evsel, "krava23", &val);
TEST_ASSERT_EQUAL("krava23 not overwritten", (int) val, 0);
ret = TEST_OK;
err_out:
parse_events_terms__exit(&terms);
evlist__delete(evlist);
test_pmu_put(dir, pmu);
return ret;
}
static int test__pmu_events(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
char dir[PATH_MAX];
@@ -539,6 +629,7 @@ static struct test_case tests__pmu[] = {
TEST_CASE("PMU name combining", name_len),
TEST_CASE("PMU name comparison", name_cmp),
TEST_CASE("PMU cmdline match", pmu_match),
TEST_CASE("PMU user config changes", pmu_usr_chgs),
{ .name = NULL, }
};