From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6303AC432BE for ; Wed, 1 Sep 2021 05:48:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 476C86108E for ; Wed, 1 Sep 2021 05:48:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242150AbhIAFtk (ORCPT ); Wed, 1 Sep 2021 01:49:40 -0400 Received: from mga12.intel.com ([192.55.52.136]:22076 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242157AbhIAFtO (ORCPT ); Wed, 1 Sep 2021 01:49:14 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10093"; a="198198157" X-IronPort-AV: E=Sophos;i="5.84,368,1620716400"; d="scan'208";a="198198157" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Aug 2021 22:48:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,368,1620716400"; d="scan'208";a="688126566" Received: from kbl-ppc.sh.intel.com ([10.239.159.163]) by fmsmga006.fm.intel.com with ESMTP; 31 Aug 2021 22:48:15 -0700 From: Jin Yao To: acme@kernel.org, jolsa@kernel.org, peterz@infradead.org, mingo@redhat.com, alexander.shishkin@linux.intel.com Cc: Linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, ak@linux.intel.com, kan.liang@intel.com, yao.jin@intel.com, rickyman7@gmail.com, john.garry@huawei.com, Jin Yao Subject: [PATCH v6 2/2] perf tests: Test for PMU alias Date: Wed, 1 Sep 2021 13:46:02 +0800 Message-Id: <20210901054602.17010-3-yao.jin@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210901054602.17010-1-yao.jin@linux.intel.com> References: <20210901054602.17010-1-yao.jin@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A perf uncore PMU may have two PMU names, a real name and an alias name. Add one test case to verify the real name and alias name having the same effect. Iterate the sysfs to get one event which has an alias and create evlist by adding two evsels. Evsel1 is created by event and evsel2 is created by alias. Test asserts: evsel1->core.attr.type == evsel2->core.attr.type evsel1->core.attr.config == evsel2->core.attr.config Signed-off-by: Jin Yao Reviewed-by: Andi Kleen --- v6: - No change. v5: - No change. v4: - Rebase to perf/core. v3: - Use fgets to read alias string from sysfs. - Resource cleanup. v2: - New in v2. tools/perf/tests/parse-events.c | 92 +++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c index 8d4866739255..fd3556cc9ad4 100644 --- a/tools/perf/tests/parse-events.c +++ b/tools/perf/tests/parse-events.c @@ -9,6 +9,7 @@ #include "pmu-hybrid.h" #include #include +#include "fncache.h" #include #include #include @@ -2194,9 +2195,91 @@ static int test_pmu_events(void) return ret; } +static bool test_alias(char **event, char **alias) +{ + char path[PATH_MAX]; + DIR *dir; + struct dirent *dent; + const char *sysfs = sysfs__mountpoint(); + char buf[128]; + FILE *file; + + if (!sysfs) + return false; + + snprintf(path, PATH_MAX, "%s/bus/event_source/devices/", sysfs); + dir = opendir(path); + if (!dir) + return false; + + while ((dent = readdir(dir))) { + if (!strcmp(dent->d_name, ".") || + !strcmp(dent->d_name, "..")) + continue; + + snprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/alias", + sysfs, dent->d_name); + + if (!file_available(path)) + continue; + + file = fopen(path, "r"); + if (!file) + continue; + + if (!fgets(buf, sizeof(buf), file)) { + fclose(file); + continue; + } + + /* Remove the last '\n' */ + buf[strlen(buf) - 1] = 0; + + fclose(file); + *event = strdup(dent->d_name); + *alias = strdup(buf); + closedir(dir); + + if (*event == NULL || *alias == NULL) { + free(*event); + free(*alias); + return false; + } + + return true; + } + + closedir(dir); + return false; +} + +static int test__checkevent_pmu_events_alias(struct evlist *evlist) +{ + struct evsel *evsel1 = evlist__first(evlist); + struct evsel *evsel2 = evlist__last(evlist); + + TEST_ASSERT_VAL("wrong type", evsel1->core.attr.type == evsel2->core.attr.type); + TEST_ASSERT_VAL("wrong config", evsel1->core.attr.config == evsel2->core.attr.config); + return 0; +} + +static int test_pmu_events_alias(char *event, char *alias) +{ + struct evlist_test e = { .id = 0, }; + char name[2 * NAME_MAX + 20]; + + snprintf(name, sizeof(name), "%s/event=1/,%s/event=1/", + event, alias); + + e.name = name; + e.check = test__checkevent_pmu_events_alias; + return test_event(&e); +} + int test__parse_events(struct test *test __maybe_unused, int subtest __maybe_unused) { int ret1, ret2 = 0; + char *event, *alias; #define TEST_EVENTS(tests) \ do { \ @@ -2221,6 +2304,15 @@ do { \ return ret; } + if (test_alias(&event, &alias)) { + int ret = test_pmu_events_alias(event, alias); + + free(event); + free(alias); + if (ret) + return ret; + } + ret1 = test_terms(test__terms, ARRAY_SIZE(test__terms)); if (!ret2) ret2 = ret1; -- 2.17.1