From nobody Thu Dec 18 18:19:13 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D3C0C54FB9 for ; Mon, 20 Nov 2023 11:15:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233274AbjKTLPc (ORCPT ); Mon, 20 Nov 2023 06:15:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233300AbjKTLPN (ORCPT ); Mon, 20 Nov 2023 06:15:13 -0500 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8FB3D50; Mon, 20 Nov 2023 03:15:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700478907; x=1732014907; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=wlc1yHtUNg5nZeWynJyWXWslqEGuM8uym9nNHVX6mDs=; b=BwpP46frdfqvTAoM9i1jaI2bjRbyn3SlVgNjq99xfYf99eBQt3ApCQX9 4WjdGxyUKxhoYlKqhPTZb09bVWpcx8OpAspbHyky5+/HTeWxFrHcS1ggK oziJG1pbJ8FzcOMQCD2lbrNci542lsM5KlLah7vLDwpJHLI0gftlaxQzo EBs+D1jtuUpqKCYZoE/7lbFC+wbbnGWvwS/r0Thx+Z3A0AHxPk9b54lBq eGj8T1JpVIhl9GXWWTw4M99upU/S4Wy9ohYCukuAnYoZzm+pHb+8Xfq7R j/qqd9O6d7yXK+UnVKfSYFPStLkC8+AyRkzfG1/zuh2s9isu4t9/nXf/Z g==; X-IronPort-AV: E=McAfee;i="6600,9927,10899"; a="477808938" X-IronPort-AV: E=Sophos;i="6.04,213,1695711600"; d="scan'208";a="477808938" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2023 03:15:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.04,213,1695711600"; d="scan'208";a="7523257" Received: from sc9itsct4906.amr.corp.intel.com (HELO localhost) ([10.249.46.107]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2023 03:15:04 -0800 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= To: linux-kselftest@vger.kernel.org, Reinette Chatre , Shuah Khan , Shaopeng Tan , =?UTF-8?q?Maciej=20Wiecz=C3=B3r-Retman?= , Fenghua Yu Cc: linux-kernel@vger.kernel.org, =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Subject: [PATCH v2 09/26] selftests/resctrl: Split show_cache_info() to test specific and generic parts Date: Mon, 20 Nov 2023 13:13:23 +0200 Message-Id: <20231120111340.7805-10-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20231120111340.7805-1-ilpo.jarvinen@linux.intel.com> References: <20231120111340.7805-1-ilpo.jarvinen@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org show_cache_info() calculates results and provides generic cache information. This makes it hard to alter pass/fail conditions. Separate the test specific checks into CAT and CMT test files and leave only the generic information part into show_cache_info(). Signed-off-by: Ilpo J=C3=A4rvinen Reviewed-by: Reinette Chatre --- tools/testing/selftests/resctrl/cache.c | 42 +++++----------------- tools/testing/selftests/resctrl/cat_test.c | 30 ++++++++++++++-- tools/testing/selftests/resctrl/cmt_test.c | 32 +++++++++++++++-- tools/testing/selftests/resctrl/resctrl.h | 6 ++-- 4 files changed, 66 insertions(+), 44 deletions(-) diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selfte= sts/resctrl/cache.c index 129d1c293518..493e0e924123 100644 --- a/tools/testing/selftests/resctrl/cache.c +++ b/tools/testing/selftests/resctrl/cache.c @@ -281,43 +281,17 @@ int cat_val(struct resctrl_val_param *param, size_t s= pan) } =20 /* - * show_cache_info: show cache test result information - * @sum_llc_val: sum of LLC cache result data - * @no_of_bits: number of bits - * @cache_span: cache span in bytes for CMT or in lines for CAT - * @max_diff: max difference - * @max_diff_percent: max difference percentage - * @num_of_runs: number of runs - * @platform: show test information on this platform - * @cmt: CMT test or CAT test - * - * Return: 0 on success. non-zero on failure. + * show_cache_info - Show generic cache test information + * @no_of_bits: Number of bits + * @avg_llc_val: Average of LLC cache result data + * @cache_span: Cache span + * @lines: @cache_span in lines or bytes */ -int show_cache_info(unsigned long sum_llc_val, int no_of_bits, - size_t cache_span, unsigned long max_diff, - unsigned long max_diff_percent, unsigned long num_of_runs, - bool platform, bool cmt) +void show_cache_info(int no_of_bits, unsigned long avg_llc_val, + size_t cache_span, bool lines) { - unsigned long avg_llc_val =3D 0; - float diff_percent; - long avg_diff =3D 0; - int ret; - - avg_llc_val =3D sum_llc_val / num_of_runs; - avg_diff =3D (long)abs(cache_span - avg_llc_val); - diff_percent =3D ((float)cache_span - avg_llc_val) / cache_span * 100; - - ret =3D platform && abs((int)diff_percent) > max_diff_percent && - (cmt ? (abs(avg_diff) > max_diff) : true); - - ksft_print_msg("%s Check cache miss rate within %lu%%\n", - ret ? "Fail:" : "Pass:", max_diff_percent); - - ksft_print_msg("Percent diff=3D%d\n", abs((int)diff_percent)); ksft_print_msg("Number of bits: %d\n", no_of_bits); ksft_print_msg("Average LLC val: %lu\n", avg_llc_val); - ksft_print_msg("Cache span (%s): %zu\n", cmt ? "bytes" : "lines", + ksft_print_msg("Cache span (%s): %zu\n", lines ? "lines" : "bytes", cache_span); - - return ret; } diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/sel= ftests/resctrl/cat_test.c index 2c8b37c0a179..2842dff292f0 100644 --- a/tools/testing/selftests/resctrl/cat_test.c +++ b/tools/testing/selftests/resctrl/cat_test.c @@ -41,6 +41,30 @@ static int cat_setup(struct resctrl_val_param *p) return ret; } =20 +static int show_results_info(unsigned long sum_llc_val, int no_of_bits, + unsigned long cache_span, unsigned long max_diff, + unsigned long max_diff_percent, unsigned long num_of_runs, + bool platform) +{ + unsigned long avg_llc_val =3D 0; + float diff_percent; + int ret; + + avg_llc_val =3D sum_llc_val / num_of_runs; + diff_percent =3D ((float)cache_span - avg_llc_val) / cache_span * 100; + + ret =3D platform && abs((int)diff_percent) > max_diff_percent; + + ksft_print_msg("%s Check cache miss rate within %lu%%\n", + ret ? "Fail:" : "Pass:", max_diff_percent); + + ksft_print_msg("Percent diff=3D%d\n", abs((int)diff_percent)); + + show_cache_info(no_of_bits, avg_llc_val, cache_span, true); + + return ret; +} + static int check_results(struct resctrl_val_param *param, size_t span) { char *token_array[8], temp[512]; @@ -76,9 +100,9 @@ static int check_results(struct resctrl_val_param *param= , size_t span) fclose(fp); no_of_bits =3D count_bits(param->mask); =20 - return show_cache_info(sum_llc_perf_miss, no_of_bits, span / 64, - MAX_DIFF, MAX_DIFF_PERCENT, runs - 1, - get_vendor() =3D=3D ARCH_INTEL, false); + return show_results_info(sum_llc_perf_miss, no_of_bits, span / 64, + MAX_DIFF, MAX_DIFF_PERCENT, runs - 1, + get_vendor() =3D=3D ARCH_INTEL); } =20 void cat_test_cleanup(void) diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/sel= ftests/resctrl/cmt_test.c index 51cbfc392f66..4573a99d87b5 100644 --- a/tools/testing/selftests/resctrl/cmt_test.c +++ b/tools/testing/selftests/resctrl/cmt_test.c @@ -27,6 +27,33 @@ static int cmt_setup(struct resctrl_val_param *p) return 0; } =20 +static int show_results_info(unsigned long sum_llc_val, int no_of_bits, + unsigned long cache_span, unsigned long max_diff, + unsigned long max_diff_percent, unsigned long num_of_runs, + bool platform) +{ + unsigned long avg_llc_val =3D 0; + float diff_percent; + long avg_diff =3D 0; + int ret; + + avg_llc_val =3D sum_llc_val / num_of_runs; + avg_diff =3D (long)abs(cache_span - avg_llc_val); + diff_percent =3D ((float)cache_span - avg_llc_val) / cache_span * 100; + + ret =3D platform && abs((int)diff_percent) > max_diff_percent && + abs(avg_diff) > max_diff; + + ksft_print_msg("%s Check cache miss rate within %lu%%\n", + ret ? "Fail:" : "Pass:", max_diff_percent); + + ksft_print_msg("Percent diff=3D%d\n", abs((int)diff_percent)); + + show_cache_info(no_of_bits, avg_llc_val, cache_span, false); + + return ret; +} + static int check_results(struct resctrl_val_param *param, size_t span, int= no_of_bits) { char *token_array[8], temp[512]; @@ -58,9 +85,8 @@ static int check_results(struct resctrl_val_param *param,= size_t span, int no_of } fclose(fp); =20 - return show_cache_info(sum_llc_occu_resc, no_of_bits, span, - MAX_DIFF, MAX_DIFF_PERCENT, runs - 1, - true, true); + return show_results_info(sum_llc_occu_resc, no_of_bits, span, + MAX_DIFF, MAX_DIFF_PERCENT, runs - 1, true); } =20 void cmt_test_cleanup(void) diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/self= tests/resctrl/resctrl.h index d35e3ba4dfa2..4a05efccab35 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -115,10 +115,8 @@ unsigned int count_bits(unsigned long n); void cmt_test_cleanup(void); int get_core_sibling(int cpu_no); int measure_llc_resctrl(const char *filename, int bm_pid); -int show_cache_info(unsigned long sum_llc_val, int no_of_bits, - size_t cache_span, unsigned long max_diff, - unsigned long max_diff_percent, unsigned long num_of_runs, - bool platform, bool cmt); +void show_cache_info(int no_of_bits, unsigned long avg_llc_val, + size_t cache_span, bool lines); =20 /* * cache_portion_size - Calculate the size of a cache portion --=20 2.30.2