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Message-ID: <Zz7KAAG2pHhCg-Dx@google.com>
Date: Wed, 20 Nov 2024 21:49:52 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] perf tests: Fix hwmon parsing with PMU name test
On Wed, Nov 20, 2024 at 04:09:55PM -0800, Ian Rogers wrote:
> Incorrectly the hwmon with PMU name test didn't pass "true". Fix and
> address issue with hwmon_pmu__config_terms needing to load events - a
> load bearing assert fired. Also fix missing list deletion when putting
> the hwmon test PMU and lower some debug warnings to make the hwmon PMU
> less spammy in verbose mode.
>
> Signed-off-by: Ian Rogers <irogers@...gle.com>
Tested-by: Namhyung Kim <namhyung@...nel.org>
Thanks,
Namhyung
> ---
> tools/perf/tests/hwmon_pmu.c | 5 +++--
> tools/perf/util/hwmon_pmu.c | 16 ++++++++++------
> 2 files changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/tools/perf/tests/hwmon_pmu.c b/tools/perf/tests/hwmon_pmu.c
> index d8bc71b51599..b4656529146e 100644
> --- a/tools/perf/tests/hwmon_pmu.c
> +++ b/tools/perf/tests/hwmon_pmu.c
> @@ -41,6 +41,7 @@ static int test_pmu_put(const char *dir, struct perf_pmu *hwm)
> if (ret)
> pr_err("Failure to \"%s\"\n", buf);
>
> + list_del(&hwm->list);
> perf_pmu__delete(hwm);
> return ret;
> }
> @@ -147,7 +148,7 @@ static int do_test(size_t i, bool with_pmu, bool with_alias)
> }
>
> if (with_pmu)
> - snprintf(str, sizeof(str), "/%s/", test_event);
> + snprintf(str, sizeof(str), "hwmon_a_test_hwmon_pmu/%s/", test_event);
> else
> strlcpy(str, test_event, sizeof(str));
>
> @@ -230,7 +231,7 @@ static int test__hwmon_pmu_without_pmu(struct test_suite *test __maybe_unused,
> static int test__hwmon_pmu_with_pmu(struct test_suite *test __maybe_unused,
> int subtest __maybe_unused)
> {
> - return test__hwmon_pmu(/*with_pmu=*/false);
> + return test__hwmon_pmu(/*with_pmu=*/true);
> }
>
> static int test__parse_hwmon_filename(struct test_suite *test __maybe_unused,
> diff --git a/tools/perf/util/hwmon_pmu.c b/tools/perf/util/hwmon_pmu.c
> index 4d9d6f405434..e61429b38ba7 100644
> --- a/tools/perf/util/hwmon_pmu.c
> +++ b/tools/perf/util/hwmon_pmu.c
> @@ -197,13 +197,13 @@ bool parse_hwmon_filename(const char *filename,
> }
> }
> if (fn_item == NULL || fn_type[0] == '\0' || (item != NULL && fn_item[0] == '\0')) {
> - pr_debug("hwmon_pmu: not a hwmon file '%s'\n", filename);
> + pr_debug3("hwmon_pmu: not a hwmon file '%s'\n", filename);
> return false;
> }
> elem = bsearch(&fn_type, hwmon_type_strs + 1, ARRAY_SIZE(hwmon_type_strs) - 1,
> sizeof(hwmon_type_strs[0]), hwmon_strcmp);
> if (!elem) {
> - pr_debug("hwmon_pmu: not a hwmon type '%s' in file name '%s'\n",
> + pr_debug3("hwmon_pmu: not a hwmon type '%s' in file name '%s'\n",
> fn_type, filename);
> return false;
> }
> @@ -223,7 +223,7 @@ bool parse_hwmon_filename(const char *filename,
> elem = bsearch(fn_item, hwmon_item_strs + 1, ARRAY_SIZE(hwmon_item_strs) - 1,
> sizeof(hwmon_item_strs[0]), hwmon_strcmp);
> if (!elem) {
> - pr_debug("hwmon_pmu: not a hwmon item '%s' in file name '%s'\n",
> + pr_debug3("hwmon_pmu: not a hwmon item '%s' in file name '%s'\n",
> fn_item, filename);
> return false;
> }
> @@ -281,7 +281,7 @@ static int hwmon_pmu__read_events(struct hwmon_pmu *pmu)
> continue;
>
> if (!parse_hwmon_filename(ent->d_name, &type, &number, &item, &alarm)) {
> - pr_debug("Not a hwmon file '%s'\n", ent->d_name);
> + pr_debug3("Not a hwmon file '%s'\n", ent->d_name);
> continue;
> }
> key.num = number;
> @@ -653,10 +653,14 @@ int hwmon_pmu__config_terms(const struct perf_pmu *pmu,
> struct parse_events_terms *terms,
> struct parse_events_error *err)
> {
> - const struct hwmon_pmu *hwm = container_of(pmu, struct hwmon_pmu, pmu);
> + struct hwmon_pmu *hwm = container_of(pmu, struct hwmon_pmu, pmu);
> struct parse_events_term *term;
> + int ret;
> +
> + ret = hwmon_pmu__read_events(hwm);
> + if (ret)
> + return ret;
>
> - assert(pmu->sysfs_aliases_loaded);
> list_for_each_entry(term, &terms->terms, list) {
> if (hwmon_pmu__config_term(hwm, attr, term, err))
> return -EINVAL;
> --
> 2.47.0.371.ga323438b13-goog
>
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