From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ritesh Harjani Subject: Re: [RFC 0/4] mmc: sdhci-msm: Add CQE support for sdhci-msm Date: Sat, 2 Sep 2017 10:46:34 +0530 Message-ID: <150ccb40-bdf5-4668-033c-289a45c8c297@codeaurora.org> References: <1504098251-27739-1-git-send-email-riteshh@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:55640 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751147AbdIBFQn (ORCPT ); Sat, 2 Sep 2017 01:16:43 -0400 In-Reply-To: Content-Language: en-US Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Adrian Hunter , ulf.hansson@linaro.org Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, stummala@codeaurora.org, asutoshd@codeaurora.org On 8/31/2017 2:09 PM, Adrian Hunter wrote: > On 30/08/17 16:04, Ritesh Harjani wrote: >> Hi All, >> >> Please ignore the previous patch series from a wrong email >> address. Stupid gitconfig issue. Apologies for the spam. >> >> This is RFC patch series based on top of ulfh_mmc/cmdq branch >> which is based upon Adrian's CMDQ patch series. >> >> Below patch series enables CQE for sdhci-msm platform. >> This has been tested on internal 8996 MTP which has CMDQ support. >> >> Fixes w.r.t. CMDQ:- >> There are some patches identified which were required atleast on >> MSM platform. I am not sure if these are required for any other >> CQE platform or not. Patchset 1, 3 & 4 commit text describes >> the problems. >> >> Performance related:- >> I gave one small shot for performance and the numbers were not looking good. >> So, unless I have tested for performance completely, I should not discuss >> on performance numbers as of now with this patchset. >> I can try doing some more performance testing and post the results - >> though this may take some while. > > You might also need custom Send Status Configuration. Yes, I will check that once. I think for the single job I/O this may not would have matter much. But sure, I will check on this, if re-configuring is needed. > >> >> I used below test script for random read/write test. >> >> *randwrite-test-script* >> [global] >> bs=32k >> size=1g >> rw=randwrite >> direct=1 >> directory=/data/fiotest > > Random write results can vary a lot. It is important to know if the eMMC > has lots of un-mapped blocks or not. e.g. for ext4 is the "-o discard" > option being used. I find I get more consistent results if I always have > discards enabled. > >> >> [file1] >> filename=singlefile1 >> >> *randread-test-script* >> [global] >> bs=32k >> size=1g >> rw=randread >> directory=/data/fiotest > > If you don't set numjobs > 1 then there is little benefit of the queue. > Also still need direct=1 Yes, silly me. But still I got lower results with single job then. But anyways let me again check this out. Thanks. > >> >> [file1] >> filename=singlefile1 >> >> @Adrian, >> Thanks a lot for pursuing and bringing CMDQ patch series to it's final stages :) >> >> >> Ritesh Harjani (4): >> mmc: cqhci: Move CQHCI_ENABLE before setting TDLBA/TDLBAU >> mmc: sdhci-msm: Add CQHCI support for sdhci-msm >> mmc: sdhci-msm: Change the desc_sz on cqe_enable/disable. >> mmc: sdhci-msm: Handle unexpected interrupt case on enabling legacy >> IRQs on CQE halt >> >> .../devicetree/bindings/mmc/sdhci-msm.txt | 1 + >> drivers/mmc/host/Kconfig | 1 + >> drivers/mmc/host/cqhci.c | 7 +- >> drivers/mmc/host/sdhci-msm.c | 121 ++++++++++++++++++++- >> 4 files changed, 125 insertions(+), 5 deletions(-) >> > -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.