Re: [PATCH v1 08/40] perf test: Test more sysfs events

["Liang, Kan" <kan.liang@linux.intel.com>]

On 2023-04-26 3:00 a.m., Ian Rogers wrote:
> Parse events for all PMUs, and not just cpu, in test "Parsing of all
> PMU events from sysfs".
> 
> Signed-off-by: Ian Rogers <irogers@google.com>

Run the test on Cascade Lake and Alder Lake. It looks good.

Tested-by: Kan Liang <kan.liang@linux.intel.com>

Thanks,
Kan
> ---
>  tools/perf/tests/parse-events.c | 103 +++++++++++++++++---------------
>  1 file changed, 55 insertions(+), 48 deletions(-)
> 
> diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
> index 8068cfd89b84..385bbbc4a409 100644
> --- a/tools/perf/tests/parse-events.c
> +++ b/tools/perf/tests/parse-events.c
> @@ -7,6 +7,7 @@
>  #include "debug.h"
>  #include "pmu.h"
>  #include "pmu-hybrid.h"
> +#include "pmus.h"
>  #include <dirent.h>
>  #include <errno.h>
>  #include "fncache.h"
> @@ -2225,49 +2226,24 @@ static int test_pmu(void)
>  
>  static int test__pmu_events(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
>  {
> -	struct stat st;
> -	char path[PATH_MAX];
> -	struct dirent *ent;
> -	DIR *dir;
> -	int ret;
> -
> -	if (!test_pmu())
> -		return TEST_SKIP;
> -
> -	snprintf(path, PATH_MAX, "%s/bus/event_source/devices/cpu/events/",
> -		 sysfs__mountpoint());
> -
> -	ret = stat(path, &st);
> -	if (ret) {
> -		pr_debug("omitting PMU cpu events tests: %s\n", path);
> -		return TEST_OK;
> -	}
> +	struct perf_pmu *pmu;
> +	int ret = TEST_OK;
>  
> -	dir = opendir(path);
> -	if (!dir) {
> -		pr_debug("can't open pmu event dir: %s\n", path);
> -		return TEST_FAIL;
> -	}
> +	perf_pmus__for_each_pmu(pmu) {
> +		struct stat st;
> +		char path[PATH_MAX];
> +		struct dirent *ent;
> +		DIR *dir;
> +		int err;
>  
> -	ret = TEST_OK;
> -	while ((ent = readdir(dir))) {
> -		struct evlist_test e = { .name = NULL, };
> -		char name[2 * NAME_MAX + 1 + 12 + 3];
> -		int test_ret;
> +		snprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/events/",
> +			sysfs__mountpoint(), pmu->name);
>  
> -		/* Names containing . are special and cannot be used directly */
> -		if (strchr(ent->d_name, '.'))
> +		err = stat(path, &st);
> +		if (err) {
> +			pr_debug("skipping PMU %s events tests: %s\n", pmu->name, path);
> +			ret = combine_test_results(ret, TEST_SKIP);
>  			continue;
> -
> -		snprintf(name, sizeof(name), "cpu/event=%s/u", ent->d_name);
> -
> -		e.name  = name;
> -		e.check = test__checkevent_pmu_events;
> -
> -		test_ret = test_event(&e);
> -		if (test_ret != TEST_OK) {
> -			pr_debug("Test PMU event failed for '%s'", name);
> -			ret = combine_test_results(ret, test_ret);
>  		}
>  		/*
>  		 * Names containing '-' are recognized as prefixes and suffixes
> @@ -2282,17 +2258,48 @@ static int test__pmu_events(struct test_suite *test __maybe_unused, int subtest
>  		if (strchr(ent->d_name, '-'))
>  			continue;
>  
> -		snprintf(name, sizeof(name), "%s:u,cpu/event=%s/u", ent->d_name, ent->d_name);
> -		e.name  = name;
> -		e.check = test__checkevent_pmu_events_mix;
> -		test_ret = test_event(&e);
> -		if (test_ret != TEST_OK) {
> -			pr_debug("Test PMU event failed for '%s'", name);
> -			ret = combine_test_results(ret, test_ret);
> +		dir = opendir(path);
> +		if (!dir) {
> +			pr_debug("can't open pmu event dir: %s\n", path);
> +			ret = combine_test_results(ret, TEST_SKIP);
> +			continue;
>  		}
> -	}
>  
> -	closedir(dir);
> +		while ((ent = readdir(dir))) {
> +			struct evlist_test e = { .name = NULL, };
> +			char name[2 * NAME_MAX + 1 + 12 + 3];
> +			int test_ret;
> +
> +			/* Names containing . are special and cannot be used directly */
> +			if (strchr(ent->d_name, '.'))
> +				continue;
> +
> +			snprintf(name, sizeof(name), "%s/event=%s/u", pmu->name, ent->d_name);
> +
> +			e.name  = name;
> +			e.check = test__checkevent_pmu_events;
> +
> +			test_ret = test_event(&e);
> +			if (test_ret != TEST_OK) {
> +				pr_debug("Test PMU event failed for '%s'", name);
> +				ret = combine_test_results(ret, test_ret);
> +			}
> +
> +			if (!is_pmu_core(pmu->name))
> +				continue;
> +
> +			snprintf(name, sizeof(name), "%s:u,%s/event=%s/u", ent->d_name, pmu->name, ent->d_name);
> +			e.name  = name;
> +			e.check = test__checkevent_pmu_events_mix;
> +			test_ret = test_event(&e);
> +			if (test_ret != TEST_OK) {
> +				pr_debug("Test PMU event failed for '%s'", name);
> +				ret = combine_test_results(ret, test_ret);
> +			}
> +		}
> +
> +		closedir(dir);
> +	}
>  	return ret;
>  }
>