From patchwork Thu Jan 25 11:12:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maciej Wieczor-Retman X-Patchwork-Id: 13530681 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 647EE45949; Thu, 25 Jan 2024 11:12:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=134.134.136.65 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706181155; cv=none; b=JPem8cLQ3v2gfqw88c2pnYwI7N5uQf7UY1VWF4QtE130bciZoWt2fOCVu7+zKOsJ7wK+xC8n2V6SEx8BG3TgvWJ64lhwKD7YcpxLP8mttJDzMAl3AdR5O/ij9v7DP3asf5CdIGSIX6Dh0gQBV5OdbyVbFAUq6gZSlzr7VTQ8Lu4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706181155; c=relaxed/simple; bh=kZQi7qRqgWMe3fx6XtYYh/qZ7SHVk5oDrPpzUONn+7g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jqiR6cQ4LJT9KY8UBvLl7P4rPPKVVU7eDaUXBTI5/nwwe+j1OCd0dYR0lt+aYctSLApznIvlhUaLcGKDzgrqFKjFxlcONeW9RhTiNahpkbJ+Wo2Ww8zDE5Ec8aAnelH+VYKqGujeiDRHcggZsl0x0jtw3kPmbakRMt1LIwqgAuI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=bLO/kufr; arc=none smtp.client-ip=134.134.136.65 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="bLO/kufr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706181153; x=1737717153; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=kZQi7qRqgWMe3fx6XtYYh/qZ7SHVk5oDrPpzUONn+7g=; b=bLO/kufrVAXPe7mC9x2hHXAr9nCuFqRWNyGd1ElrTixS19LxUpZ8ZFIT mjzRtvkAPFWt49cIOjaF7DkgK+u/oYzaW4X8r9ETekpED7eTICsL5GB/M tjmqDsl+muWDn/V0/4rvqZ6BxjOTa/mnI2HNura5ut0X9kex4Ch0a31uX TuUot7++GDJNn1CMGnaeHivi3JlFxx9H1t17mSgpopoPFhiFjg1uiW9/u O3o+tszkeCEemSjKQINm3YH+2zuxlQjb6NrZ49SKWhLyymQ4xIxpYoo12 E/v2hyqzC3Xneb1WIDPllxFhw9BGJVyOREqLsUQWBcn4dOIIZpyxng4SM w==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="405881002" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="405881002" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jan 2024 03:12:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="877017521" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="877017521" Received: from apejovix-mobl1.ger.corp.intel.com (HELO wieczorr-mobl1.intel.com) ([10.213.0.239]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jan 2024 03:12:29 -0800 From: Maciej Wieczor-Retman To: reinette.chatre@intel.com, shuah@kernel.org, fenghua.yu@intel.com Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, ilpo.jarvinen@linux.intel.com Subject: [PATCH v3 3/5] selftests/resctrl: Split validate_resctrl_feature_request() Date: Thu, 25 Jan 2024 12:12:11 +0100 Message-ID: <415cc65c113143c833ca2eaacd3a03c285c2e841.1706180726.git.maciej.wieczor-retman@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 validate_resctrl_feature_request() is used to test both if a resource is present in the info directory, and if a passed monitoring feature is present in the mon_features file. Refactor validate_resctrl_feature_request() into two smaller functions that each accomplish one check to give feature checking more granularity: - Resource directory presence in the /sys/fs/resctrl/info directory. - Feature name presence in the /sys/fs/resctrl/info/L3_MON/mon_features file. Signed-off-by: Maciej Wieczor-Retman --- Changelog v3: - Move new function to a separate patch. (Reinette) - Rewrite resctrl_mon_feature_exists() only for L3_MON. Changelog v2: - Add this patch. tools/testing/selftests/resctrl/cmt_test.c | 4 +-- tools/testing/selftests/resctrl/mba_test.c | 4 +-- tools/testing/selftests/resctrl/mbm_test.c | 6 ++-- tools/testing/selftests/resctrl/resctrl.h | 3 +- tools/testing/selftests/resctrl/resctrlfs.c | 33 +++++++++++++-------- 5 files changed, 30 insertions(+), 20 deletions(-) diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c index dd5ca343c469..428de9df81c8 100644 --- a/tools/testing/selftests/resctrl/cmt_test.c +++ b/tools/testing/selftests/resctrl/cmt_test.c @@ -169,8 +169,8 @@ static int cmt_run_test(const struct resctrl_test *test, const struct user_param static bool cmt_feature_check(const struct resctrl_test *test) { - return test_resource_feature_check(test) && - validate_resctrl_feature_request("L3_MON", "llc_occupancy"); + return resctrl_mon_feature_exists("llc_occupancy") && + resctrl_resource_exists("L3"); } struct resctrl_test cmt_test = { diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c index da256d2dbe5c..e22285b80e37 100644 --- a/tools/testing/selftests/resctrl/mba_test.c +++ b/tools/testing/selftests/resctrl/mba_test.c @@ -170,8 +170,8 @@ static int mba_run_test(const struct resctrl_test *test, const struct user_param static bool mba_feature_check(const struct resctrl_test *test) { - return test_resource_feature_check(test) && - validate_resctrl_feature_request("L3_MON", "mbm_local_bytes"); + return resctrl_resource_exists(test->resource) && + resctrl_mon_feature_exists("mbm_local_bytes"); } struct resctrl_test mba_test = { diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c index 34879e7b71a0..9c885bc427ca 100644 --- a/tools/testing/selftests/resctrl/mbm_test.c +++ b/tools/testing/selftests/resctrl/mbm_test.c @@ -97,7 +97,7 @@ static int mbm_setup(const struct resctrl_test *test, return END_OF_TESTS; /* Set up shemata with 100% allocation on the first run. */ - if (p->num_of_runs == 0 && validate_resctrl_feature_request("MB", NULL)) + if (p->num_of_runs == 0 && resctrl_resource_exists("MB")) ret = write_schemata(p->ctrlgrp, "100", uparams->cpu, test->resource); p->num_of_runs++; @@ -140,8 +140,8 @@ static int mbm_run_test(const struct resctrl_test *test, const struct user_param static bool mbm_feature_check(const struct resctrl_test *test) { - return validate_resctrl_feature_request("L3_MON", "mbm_total_bytes") && - validate_resctrl_feature_request("L3_MON", "mbm_local_bytes"); + return resctrl_mon_feature_exists("mbm_total_bytes") && + resctrl_mon_feature_exists("mbm_local_bytes"); } struct resctrl_test mbm_test = { diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index 5116ea082d03..4603b215b97e 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -136,7 +136,8 @@ int get_domain_id(const char *resource, int cpu_no, int *domain_id); int mount_resctrlfs(void); int umount_resctrlfs(void); int validate_bw_report_request(char *bw_report); -bool validate_resctrl_feature_request(const char *resource, const char *feature); +bool resctrl_resource_exists(const char *resource); +bool resctrl_mon_feature_exists(const char *feature); bool test_resource_feature_check(const struct resctrl_test *test); char *fgrep(FILE *inf, const char *str); int taskset_benchmark(pid_t bm_pid, int cpu_no, cpu_set_t *old_affinity); diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c index cb5147c5f9a9..e4ba8614fb7b 100644 --- a/tools/testing/selftests/resctrl/resctrlfs.c +++ b/tools/testing/selftests/resctrl/resctrlfs.c @@ -711,20 +711,16 @@ char *fgrep(FILE *inf, const char *str) } /* - * validate_resctrl_feature_request - Check if requested feature is valid. - * @resource: Required resource (e.g., MB, L3, L2, L3_MON, etc.) - * @feature: Required monitor feature (in mon_features file). Can only be - * set for L3_MON. Must be NULL for all other resources. + * resctrl_resource_exists - Check if a resource is supported. + * @resource: Resctrl resource (e.g., MB, L3, L2, L3_MON, etc.) * - * Return: True if the resource/feature is supported, else false. False is + * Return: True if the resource is supported, else false. False is * also returned if resctrl FS is not mounted. */ -bool validate_resctrl_feature_request(const char *resource, const char *feature) +bool resctrl_resource_exists(const char *resource) { char res_path[PATH_MAX]; struct stat statbuf; - char *res; - FILE *inf; int ret; if (!resource) @@ -739,11 +735,24 @@ bool validate_resctrl_feature_request(const char *resource, const char *feature) if (stat(res_path, &statbuf)) return false; + return true; +} + +/* + * resctrl_mon_feature_exists - Check if requested monitoring L3_MON feature is valid. + * @feature: Required monitor feature (in mon_features file). + * + * Return: True if the feature is supported, else false. + */ +bool resctrl_mon_feature_exists(const char *feature) +{ + char *res; + FILE *inf; + if (!feature) - return true; + return false; - snprintf(res_path, sizeof(res_path), "%s/%s/mon_features", INFO_PATH, resource); - inf = fopen(res_path, "r"); + inf = fopen("/sys/fs/resctrl/info/L3_MON/mon_features", "r"); if (!inf) return false; @@ -756,7 +765,7 @@ bool validate_resctrl_feature_request(const char *resource, const char *feature) bool test_resource_feature_check(const struct resctrl_test *test) { - return validate_resctrl_feature_request(test->resource, NULL); + return resctrl_resource_exists(test->resource); } int filter_dmesg(void)