From patchwork Tue Sep 5 02:39:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenchao Chen X-Patchwork-Id: 721407 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 1899ACA0FF3 for ; Tue, 5 Sep 2023 16:20:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245708AbjIEQUq (ORCPT ); Tue, 5 Sep 2023 12:20:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343617AbjIECkR (ORCPT ); Mon, 4 Sep 2023 22:40:17 -0400 Received: from SHSQR01.spreadtrum.com (mx1.unisoc.com [222.66.158.135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4EB2AEB; Mon, 4 Sep 2023 19:40:10 -0700 (PDT) Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 3852dfYk095566; Tue, 5 Sep 2023 10:39:41 +0800 (+08) (envelope-from Wenchao.Chen@unisoc.com) Received: from SHDLP.spreadtrum.com (shmbx05.spreadtrum.com [10.29.1.56]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4RfqQX1bnbz2RD6Z7; Tue, 5 Sep 2023 10:36:52 +0800 (CST) Received: from xm9614pcu.spreadtrum.com (10.13.2.29) by shmbx05.spreadtrum.com (10.29.1.56) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Tue, 5 Sep 2023 10:39:39 +0800 From: Wenchao Chen To: CC: , , , , , Wenchao Chen Subject: [PATCH V3 0/2 RESEND] mmc: hsq: dynamically adjust hsq_depth to improve performance Date: Tue, 5 Sep 2023 10:39:19 +0800 Message-ID: <20230905023921.10766-1-wenchao.chen@unisoc.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.13.2.29] X-ClientProxiedBy: SHCAS03.spreadtrum.com (10.0.1.207) To shmbx05.spreadtrum.com (10.29.1.56) X-MAIL: SHSQR01.spreadtrum.com 3852dfYk095566 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Change in v3: - Use "mrq->data->blksz * mrq->data->blocks == 4096" for 4K. - Add explanation for "HSQ_PERFORMANCE_DEPTH". Change in v2: - Support for dynamic adjustment of hsq_depth. Test ===== I tested 3 times for each case and output a average speed. Ran 'fio' to evaluate the performance: 1.Fixed hsq_depth 1) Sequential write: Speed: 168 164 165 Average speed: 165.67MB/S 2) Sequential read: Speed: 326 326 326 Average speed: 326MB/S 3) Random write: Speed: 82.6 83 83 Average speed: 82.87MB/S 4) Random read: Speed: 48.2 48.3 47.6 Average speed: 48.03MB/S 2.Dynamic hsq_depth 1) Sequential write: Speed: 167 166 166 Average speed: 166.33MB/S 2) Sequential read: Speed: 327 326 326 Average speed: 326.3MB/S 3) Random write: Speed: 86.1 86.2 87.7 Average speed: 86.67MB/S 4) Random read: Speed: 48.1 48 48 Average speed: 48.03MB/S Based on the above data, dynamic hsq_depth can improve the performance of random writes. Random write improved by 4.6%. In addition, we tested 8K and 16K. 1.Fixed hsq_depth 1) Random write(bs=8K): Speed: 116 114 115 Average speed: 115MB/S 2) Random read(bs=8K): Speed: 83 83 82.5 Average speed: 82.8MB/S 3) Random write(bs=16K): Speed: 141 142 141 Average speed: 141.3MB/S 4) Random read(bs=16K): Speed: 132 132 132 Average speed: 132MB/S 2.Dynamic hsq_depth(mrq->data->blksz * mrq->data->blocks == 8192 or 16384) 1) Random write(bs=8K): Speed: 115 115 115 Average speed: 115MB/S 2) Random read(bs=8K): Speed: 82.7 82.9 82.8 Average speed: 82.8MB/S 3) Random write(bs=16K): Speed: 143 141 141 Average speed: 141.6MB/S 4) Random read(bs=16K): Speed: 132 132 132 Average speed: 132MB/S Increasing hsq_depth cannot improve 8k and 16k random read/write performance. To reduce latency, we dynamically increase hsq_depth only for 4k random writes. Test cmd ========= 1)write: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=write -bs=512K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 2)read: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=read -bs=512K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 3)randwrite: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randwrite -bs=4K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 4)randread: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randread -bs=4K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 5)randwrite: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randwrite -bs=8K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 6)randread: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randread -bs=8K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 7)randwrite: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randwrite -bs=16K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 8)randread: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randread -bs=16K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 Wenchao Chen (2): mmc: queue: replace immediate with hsq->depth mmc: hsq: dynamic adjustment of hsq->depth drivers/mmc/core/queue.c | 6 +----- drivers/mmc/host/mmc_hsq.c | 28 ++++++++++++++++++++++++++++ drivers/mmc/host/mmc_hsq.h | 11 +++++++++++ include/linux/mmc/host.h | 1 + 4 files changed, 41 insertions(+), 5 deletions(-)