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Date:   Fri, 28 Apr 2023 22:34:36 -0700
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Subject: [PATCH v3 16/46] perf test: Roundtrip name, don't assume 1 event per name
From:   Ian Rogers <irogers@google.com>
To:     Arnaldo Carvalho de Melo <acme@kernel.org>,
        Kan Liang <kan.liang@linux.intel.com>,
        Ahmad Yasin <ahmad.yasin@intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Stephane Eranian <eranian@google.com>,
        Andi Kleen <ak@linux.intel.com>,
        Perry Taylor <perry.taylor@intel.com>,
        Samantha Alt <samantha.alt@intel.com>,
        Caleb Biggers <caleb.biggers@intel.com>,
        Weilin Wang <weilin.wang@intel.com>,
        Edward Baker <edward.baker@intel.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Florian Fischer <florian.fischer@muhq.space>,
        Rob Herring <robh@kernel.org>,
        Zhengjun Xing <zhengjun.xing@linux.intel.com>,
        John Garry <john.g.garry@oracle.com>,
        Kajol Jain <kjain@linux.ibm.com>,
        Sumanth Korikkar <sumanthk@linux.ibm.com>,
        Thomas Richter <tmricht@linux.ibm.com>,
        Tiezhu Yang <yangtiezhu@loongson.cn>,
        Ravi Bangoria <ravi.bangoria@amd.com>,
        Leo Yan <leo.yan@linaro.org>,
        Yang Jihong <yangjihong1@huawei.com>,
        James Clark <james.clark@arm.com>,
        Suzuki Poulouse <suzuki.poulose@arm.com>,
        Kang Minchul <tegongkang@gmail.com>,
        Athira Rajeev <atrajeev@linux.vnet.ibm.com>,
        linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Ian Rogers <irogers@google.com>
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Precedence: bulk

Opening hardware names and a legacy cache event on a hybrid PMU opens
it on each PMU. Parsing and checking indexes fails, as the parsed
index is double the expected. Avoid checking the index by just
comparing the names immediately after the parse.

This change removes hard coded hybrid logic and removes assumptions
about the expansion of an event. On hybrid the PMUs may or may not
support an event and so using a distance isn't a consistent solution.

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/tests/evsel-roundtrip-name.c | 119 ++++++++++--------------
 1 file changed, 49 insertions(+), 70 deletions(-)

diff --git a/tools/perf/tests/evsel-roundtrip-name.c b/tools/perf/tests/evsel-roundtrip-name.c
index e94fed901992..15ff86f9da0b 100644
--- a/tools/perf/tests/evsel-roundtrip-name.c
+++ b/tools/perf/tests/evsel-roundtrip-name.c
@@ -4,114 +4,93 @@
 #include "parse-events.h"
 #include "tests.h"
 #include "debug.h"
-#include "pmu.h"
-#include "pmu-hybrid.h"
-#include <errno.h>
 #include <linux/kernel.h>
 
 static int perf_evsel__roundtrip_cache_name_test(void)
 {
-	char name[128];
-	int type, op, err = 0, ret = 0, i, idx;
-	struct evsel *evsel;
-	struct evlist *evlist = evlist__new();
+	int ret = TEST_OK;
 
-        if (evlist == NULL)
-                return -ENOMEM;
-
-	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
-		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
+	for (int type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
+		for (int op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 			/* skip invalid cache type */
 			if (!evsel__is_cache_op_valid(type, op))
 				continue;
 
-			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
-				__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
-				err = parse_event(evlist, name);
-				if (err)
-					ret = err;
-			}
-		}
-	}
-
-	idx = 0;
-	evsel = evlist__first(evlist);
+			for (int res = 0; res < PERF_COUNT_HW_CACHE_RESULT_MAX; res++) {
+				char name[128];
+				struct evlist *evlist = evlist__new();
+				struct evsel *evsel;
+				int err;
 
-	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
-		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
-			/* skip invalid cache type */
-			if (!evsel__is_cache_op_valid(type, op))
-				continue;
+				if (evlist == NULL) {
+					pr_debug("Failed to alloc evlist");
+					return TEST_FAIL;
+				}
+				__evsel__hw_cache_type_op_res_name(type, op, res,
+								name, sizeof(name));
 
-			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
-				__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
-				if (evsel->core.idx != idx)
+				err = parse_event(evlist, name);
+				if (err) {
+					pr_debug("Failure to parse cache event '%s' possibly as PMUs don't support it",
+						name);
+					evlist__delete(evlist);
 					continue;
-
-				++idx;
-
-				if (strcmp(evsel__name(evsel), name)) {
-					pr_debug("%s != %s\n", evsel__name(evsel), name);
-					ret = -1;
 				}
-
-				evsel = evsel__next(evsel);
+				evlist__for_each_entry(evlist, evsel) {
+					if (strcmp(evsel__name(evsel), name)) {
+						pr_debug("%s != %s\n", evsel__name(evsel), name);
+						ret = TEST_FAIL;
+					}
+				}
+				evlist__delete(evlist);
 			}
 		}
 	}
-
-	evlist__delete(evlist);
 	return ret;
 }
 
-static int __perf_evsel__name_array_test(const char *const names[], int nr_names,
-					 int distance)
+static int perf_evsel__name_array_test(const char *const names[], int nr_names)
 {
-	int i, err;
-	struct evsel *evsel;
-	struct evlist *evlist = evlist__new();
+	int ret = TEST_OK;
 
-        if (evlist == NULL)
-                return -ENOMEM;
+	for (int i = 0; i < nr_names; ++i) {
+		struct evlist *evlist = evlist__new();
+		struct evsel *evsel;
+		int err;
 
-	for (i = 0; i < nr_names; ++i) {
+		if (evlist == NULL) {
+			pr_debug("Failed to alloc evlist");
+			return TEST_FAIL;
+		}
 		err = parse_event(evlist, names[i]);
 		if (err) {
 			pr_debug("failed to parse event '%s', err %d\n",
 				 names[i], err);
-			goto out_delete_evlist;
+			evlist__delete(evlist);
+			ret = TEST_FAIL;
+			continue;
 		}
-	}
-
-	err = 0;
-	evlist__for_each_entry(evlist, evsel) {
-		if (strcmp(evsel__name(evsel), names[evsel->core.idx / distance])) {
-			--err;
-			pr_debug("%s != %s\n", evsel__name(evsel), names[evsel->core.idx / distance]);
+		evlist__for_each_entry(evlist, evsel) {
+			if (strcmp(evsel__name(evsel), names[i])) {
+				pr_debug("%s != %s\n", evsel__name(evsel), names[i]);
+				ret = TEST_FAIL;
+			}
 		}
+		evlist__delete(evlist);
 	}
-
-out_delete_evlist:
-	evlist__delete(evlist);
-	return err;
+	return ret;
 }
 
-#define perf_evsel__name_array_test(names, distance) \
-	__perf_evsel__name_array_test(names, ARRAY_SIZE(names), distance)
-
 static int test__perf_evsel__roundtrip_name_test(struct test_suite *test __maybe_unused,
 						 int subtest __maybe_unused)
 {
-	int err = 0, ret = 0;
-
-	if (perf_pmu__has_hybrid() && perf_pmu__hybrid_mounted("cpu_atom"))
-		return perf_evsel__name_array_test(evsel__hw_names, 2);
+	int err = 0, ret = TEST_OK;
 
-	err = perf_evsel__name_array_test(evsel__hw_names, 1);
+	err = perf_evsel__name_array_test(evsel__hw_names, PERF_COUNT_HW_MAX);
 	if (err)
 		ret = err;
 
-	err = __perf_evsel__name_array_test(evsel__sw_names, PERF_COUNT_SW_DUMMY + 1, 1);
+	err = perf_evsel__name_array_test(evsel__sw_names, PERF_COUNT_SW_DUMMY + 1);
 	if (err)
 		ret = err;
 
-- 
2.40.1.495.gc816e09b53d-goog