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 X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5BB80C3F2D1 for ; Wed, 4 Mar 2020 09:37:51 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 274612073D for ; Wed, 4 Mar 2020 09:37:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 274612073D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 934916B0003; Wed, 4 Mar 2020 04:37:50 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8BE0D6B0005; Wed, 4 Mar 2020 04:37:50 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7AC696B0006; Wed, 4 Mar 2020 04:37:50 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0214.hostedemail.com [216.40.44.214]) by kanga.kvack.org (Postfix) with ESMTP id 5ED6B6B0003 for ; Wed, 4 Mar 2020 04:37:50 -0500 (EST) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id DDE6B181AC9BF for ; Wed, 4 Mar 2020 09:37:49 +0000 (UTC) X-FDA: 76557177858.02.pump02_614ed8cc7461d X-HE-Tag: pump02_614ed8cc7461d X-Filterd-Recvd-Size: 3182 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Wed, 4 Mar 2020 09:37:48 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04452;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=16;SR=0;TI=SMTPD_---0TrdAbQ3_1583314652; Received: from IT-FVFX43SYHV2H.local(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0TrdAbQ3_1583314652) by smtp.aliyun-inc.com(127.0.0.1); Wed, 04 Mar 2020 17:37:32 +0800 Subject: Re: [PATCH v9 07/20] mm/lru: introduce TestClearPageLRU To: Rong Chen Cc: Andrew Morton , cgroups@vger.kernel.org, mgorman@techsingularity.net, tj@kernel.org, hughd@google.com, khlebnikov@yandex-team.ru, daniel.m.jordan@oracle.com, yang.shi@linux.alibaba.com, willy@infradead.org, hannes@cmpxchg.org, lkp@intel.com, Michal Hocko , Vladimir Davydov , linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <1583146830-169516-1-git-send-email-alex.shi@linux.alibaba.com> <1583146830-169516-8-git-send-email-alex.shi@linux.alibaba.com> <20200302141144.b30abe0d89306fd387e13a92@linux-foundation.org> <9cacdc21-9c1f-2a17-05cb-e9cf2959cef5@linux.alibaba.com> <20200303164659.b3a30ab9d68c9ed82299a29c@linux-foundation.org> <6d155f79-8ba2-b322-4e92-311e7be98f79@linux.alibaba.com> <20200304090301.GB5972@shao2-debian> From: Alex Shi Message-ID: <60d253bb-33d0-4328-bfde-3b7c26435cde@linux.alibaba.com> Date: Wed, 4 Mar 2020 17:37:31 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200304090301.GB5972@shao2-debian> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: =E5=9C=A8 2020/3/4 =E4=B8=8B=E5=8D=885:03, Rong Chen =E5=86=99=E9=81=93: >> Hi Andrew, >> >> Thanks a lot for comments! >> Yes, this patch is essential for all next. >> >> Consider the normal memory testing would focus on user page, that prob= abably with PageLRU.=20 >> >> Fengguang's vm-scalibicase-small-allocs which used a lots vm_area_stru= ct slab, which may >> got some impact. 0day/Cheng Rong is working on the test. In my roughly= testing, it may drop 5% on my >> 96threads/394GB machine. >> >> Thanks >> Alex > Hi, >=20 > We only tested one case and found a slight regression of vm-scalability= .median from this patch set: >=20 > Test case: small allocs > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > compiler/cpufreq_governor/kconfig/rootfs/runtime/tbox_group/test/testca= se/ucode: > gcc-7/performance/x86_64-rhel-7.6/debian-x86_64-20191114.cgz/300s/lkp= -ivb-d02/small-allocs/vm-scalability/0x21 It's a very acceptable result! Thanks a lot for so quick testing! I believe your results would be far mo= re stable than me. :) (My testing show quit different result in 2 reboot(1.3% or 6.6% drop). Ma= ybe sth wrong for me in this case.) Thanks for your report! Alex