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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76A58C83F01 for ; Sat, 26 Aug 2023 16:44:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230211AbjHZQnx (ORCPT ); Sat, 26 Aug 2023 12:43:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230203AbjHZQnt (ORCPT ); Sat, 26 Aug 2023 12:43:49 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A6B21995; Sat, 26 Aug 2023 09:43:38 -0700 (PDT) X-UUID: afba5c26442f11eeb20a276fd37b9834-20230827 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=run78isH9wzuv4qEeW4mY8FxhoAXSLzkLolztccpSzM=; b=PwjqMvbrBO/ZU7p57J5iqNeMWApmC5ERFmMRQbiFU0j57V1ghXhHEJ5LNZ7eUuEJat8Z93KfKbHbUUWMPY0goa0bLZ7DNntkleegp9xriEGptqvXUJyZDhf90Hk6N2/JYF9QcwqV0U4bRvNqfeZoRSKHFnXb7+LkLgzH4zm9X/g=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.31,REQID:fe925674-a4eb-4fd3-8d3e-12e0b9b64a6a,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:0ad78a4,CLOUDID:48abf9ee-9a6e-4c39-b73e-f2bc08ca3dc5,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO, DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: afba5c26442f11eeb20a276fd37b9834-20230827 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1266044288; Sun, 27 Aug 2023 00:43:29 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Sun, 27 Aug 2023 00:43:28 +0800 Received: from mbjsdccf07.mediatek.inc (10.15.20.246) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sun, 27 Aug 2023 00:43:27 +0800 From: To: CC: , , , , , , , , Subject: Re: [PATCH 1/1] mmc: Set optimal I/O size when mmc_setip_queue Date: Sun, 27 Aug 2023 00:26:35 +0800 Message-ID: <20230826162635.617-1-Sharp.Xia@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <769a67cb-1b32-fd4f-b37e-e3ec4dab5eb9@rock-chips.com> References: <769a67cb-1b32-fd4f-b37e-e3ec4dab5eb9@rock-chips.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2023-08-25 at 17:17 +0800, Shawn Lin wrote: > > > On 2023/8/25 16:39, Sharp.Xia@mediatek.com wrote: > > On Fri, 2023-08-25 at 16:11 +0800, Shawn Lin wrote: > >> > >> Hi Sharp, > > ... > > >>> 1024 > >>> > > Hi Shawn, > > > > What is your readahead value before and after applying this patch? > > > > The original readahead is 128, and after applying the patch is 1024 > > > cat /d/mmc0/ios > clock: 200000000 Hz > actual clock: 200000000 Hz > vdd: 18 (3.0 ~ 3.1 V) > bus mode: 2 (push-pull) > chip select: 0 (don't care) > power mode: 2 (on) > bus width: 3 (8 bits) > timing spec: 10 (mmc HS400 enhanced strobe) > signal voltage: 1 (1.80 V) > driver type: 0 (driver type B) > > The driver I used is sdhci-of-dwcmshc.c with a KLMBG2JETDB041 eMMC > chip. I tested with RK3568 and sdhci-of-dwcmshc.c driver, the performance improved by 2~3%. Before: root@OpenWrt:/mnt/mmcblk0p3# time dd if=test.img of=/dev/null 2097152+0 records in 2097152+0 records out real 0m 6.01s user 0m 0.84s sys 0m 2.89s root@OpenWrt:/mnt/mmcblk0p3# cat /sys/block/mmcblk0/queue/read_ahead_kb 128 After: root@OpenWrt:/mnt/mmcblk0p3# echo 3 > /proc/sys/vm/drop_caches root@OpenWrt:/mnt/mmcblk0p3# time dd if=test.img of=/dev/null 2097152+0 records in 2097152+0 records out real 0m 5.86s user 0m 1.04s sys 0m 3.18s root@OpenWrt:/mnt/mmcblk0p3# cat /sys/block/mmcblk0/queue/read_ahead_kb 1024 root@OpenWrt:/sys/kernel/debug/mmc0# cat ios clock: 200000000 Hz actual clock: 200000000 Hz vdd: 18 (3.0 ~ 3.1 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 3 (8 bits) timing spec: 9 (mmc HS200) signal voltage: 1 (1.80 V) driver type: 0 (driver type B)