From nobody Thu Dec 18 18:18:30 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 70D2AC54E76 for ; Mon, 20 Nov 2023 11:14:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233093AbjKTLOa (ORCPT ); Mon, 20 Nov 2023 06:14:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232947AbjKTLOW (ORCPT ); Mon, 20 Nov 2023 06:14:22 -0500 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3D4BEB; Mon, 20 Nov 2023 03:14:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700478858; x=1732014858; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oPd148SmWp/iUjrfvXH7JtKA59KsnXMqvq4QV8VYIOI=; b=Wj32LvqrBJItBLlrsMJSCegGaKe/SGOaCDm90XovIF24q5ehmCwJNLzj 3nEQjBksuWRj670FcFDO0SBrWVc2+DkUfmYuOmAIkXI+37GavWnbZOHuS XYw9sR+b9UHUxUBknxO1nAC7aHG/5/+XZb27rQS31EmB2+F2pcFh+YH4t UdGac9C3Zf9UIBAkcmQ5rIbzeGQFz1NJgyF4yXPSaWbZZaAMZfQoVvRNS qeEgDhiaIi7J5zxKolAs84DG27B5bfan6/zF3kx+PFVuZD0ySZFYcnI9R HeeN72W3G4uH/V1jaSV3blIZooSE8HDQWDzCWJjMKV6ClYwhDKhZw9huN Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10899"; a="458095894" X-IronPort-AV: E=Sophos;i="6.04,213,1695711600"; d="scan'208";a="458095894" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2023 03:14:18 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10899"; a="716179315" X-IronPort-AV: E=Sophos;i="6.04,213,1695711600"; d="scan'208";a="716179315" Received: from sc9itsct4906.amr.corp.intel.com (HELO localhost) ([10.249.46.107]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2023 03:14:15 -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 03/26] selftests/resctrl: Refactor fill_buf functions Date: Mon, 20 Nov 2023 13:13:17 +0200 Message-Id: <20231120111340.7805-4-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 There are unnecessary nested calls in fill_buf.c: - run_fill_buf() calls fill_cache() - alloc_buffer() calls malloc_and_init_memory() Simplify the code flow and remove those unnecessary call levels by moving the called code inside the calling function. Resolve the difference in run_fill_buf() and fill_cache() parameter name into 'buf_size' which is more descriptive than 'span'. Also, while moving the allocation related code, rename 'p' into 'buf' to be consistent in naming the variables. Signed-off-by: Ilpo J=C3=A4rvinen Reviewed-by: Reinette Chatre --- tools/testing/selftests/resctrl/fill_buf.c | 54 +++++++--------------- tools/testing/selftests/resctrl/resctrl.h | 2 +- 2 files changed, 18 insertions(+), 38 deletions(-) diff --git a/tools/testing/selftests/resctrl/fill_buf.c b/tools/testing/sel= ftests/resctrl/fill_buf.c index 6f32f44128e1..b9303a9d819b 100644 --- a/tools/testing/selftests/resctrl/fill_buf.c +++ b/tools/testing/selftests/resctrl/fill_buf.c @@ -51,29 +51,6 @@ static void mem_flush(unsigned char *buf, size_t buf_siz= e) sb(); } =20 -static void *malloc_and_init_memory(size_t buf_size) -{ - void *p =3D NULL; - uint64_t *p64; - size_t s64; - int ret; - - ret =3D posix_memalign(&p, PAGE_SIZE, buf_size); - if (ret < 0) - return NULL; - - p64 =3D (uint64_t *)p; - s64 =3D buf_size / sizeof(uint64_t); - - while (s64 > 0) { - *p64 =3D (uint64_t)rand(); - p64 +=3D (CL_SIZE / sizeof(uint64_t)); - s64 -=3D (CL_SIZE / sizeof(uint64_t)); - } - - return p; -} - static int fill_one_span_read(unsigned char *buf, size_t buf_size) { unsigned char *end_ptr =3D buf + buf_size; @@ -137,12 +114,25 @@ static int fill_cache_write(unsigned char *buf, size_= t buf_size, bool once) =20 static unsigned char *alloc_buffer(size_t buf_size, int memflush) { - unsigned char *buf; + void *buf =3D NULL; + uint64_t *p64; + size_t s64; + int ret; =20 - buf =3D malloc_and_init_memory(buf_size); - if (!buf) + ret =3D posix_memalign(&buf, PAGE_SIZE, buf_size); + if (ret < 0) return NULL; =20 + /* Initialize the buffer */ + p64 =3D buf; + s64 =3D buf_size / sizeof(uint64_t); + + while (s64 > 0) { + *p64 =3D (uint64_t)rand(); + p64 +=3D (CL_SIZE / sizeof(uint64_t)); + s64 -=3D (CL_SIZE / sizeof(uint64_t)); + } + /* Flush the memory before using to avoid "cache hot pages" effect */ if (memflush) mem_flush(buf, buf_size); @@ -150,7 +140,7 @@ static unsigned char *alloc_buffer(size_t buf_size, int= memflush) return buf; } =20 -static int fill_cache(size_t buf_size, int memflush, int op, bool once) +int run_fill_buf(size_t buf_size, int memflush, int op, bool once) { unsigned char *buf; int ret; @@ -164,16 +154,6 @@ static int fill_cache(size_t buf_size, int memflush, i= nt op, bool once) else ret =3D fill_cache_write(buf, buf_size, once); free(buf); - - return ret; -} - -int run_fill_buf(size_t span, int memflush, int op, bool once) -{ - size_t cache_size =3D span; - int ret; - - ret =3D fill_cache(cache_size, memflush, op, once); if (ret) { printf("\n Error in fill cache\n"); return -1; diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/self= tests/resctrl/resctrl.h index a33f414f6019..08b95b5a4949 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -92,7 +92,7 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, = char *mongrp, char *resctrl_val); int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu, int group_fd, unsigned long flags); -int run_fill_buf(size_t span, int memflush, int op, bool once); +int run_fill_buf(size_t buf_size, int memflush, int op, bool once); int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_para= m *param); int mbm_bw_change(int cpu_no, const char * const *benchmark_cmd); void tests_cleanup(void); --=20 2.30.2