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=-4.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 8103AC433ED for ; Fri, 7 May 2021 19:09:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 458D661404 for ; Fri, 7 May 2021 19:09:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229816AbhEGTKv (ORCPT ); Fri, 7 May 2021 15:10:51 -0400 Received: from mail-io1-f46.google.com ([209.85.166.46]:38441 "EHLO mail-io1-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229852AbhEGTJH (ORCPT ); Fri, 7 May 2021 15:09:07 -0400 Received: by mail-io1-f46.google.com with SMTP id t3so8896182iol.5 for ; Fri, 07 May 2021 12:08:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=j5E2YSP3NYcynyofXZdzGROLm20IiDiHBcvrV+16RiU=; b=UUrLjAlBbtwowDv1elXLAyUyw5gs13b6wFrjh8uIJXVrvRn+sop7Ez8akRViF+MoGS Uk6s3t6CfgY28JLdSEbz8LaFR224O6JMj502D+0OcxJ1/qJuvHW1W/t68tOXBL5kBtcG 83deIhx8WXFDrfhD/ZAm5mqlEdRRC/IJ+3C87kfSVWbsAwkfhjU0JdXaXroj0TivtN8/ OSJvGAOFSnXDS0AgRuLpdTDa82A6ybKU5UVqs9Mj9M/voTcSxhaA3tkSgCAy2AShTC7A 96E5ZfJv89WD+vW7sQ1Zt08/UxuND2O9B7K/0EjeElPwwUpkCdoKZsGCJ/5JNJRV+v+C Z7og== X-Gm-Message-State: AOAM532QnirtYiS/d3fWaUuc5+3DaazLcWUdxq4iaziNN7fyjFg/fbDP GdA3A9lOFz1rDYWjFlzcneQ= X-Google-Smtp-Source: ABdhPJz/PEGgKCTtwBn+SohYZtyyyVYhK5giMROF3zHxpMnHV8j/Wf7A4ie8MiKlGcw5N/vYunFd9w== X-Received: by 2002:a05:6602:1641:: with SMTP id y1mr8694414iow.54.1620414485520; Fri, 07 May 2021 12:08:05 -0700 (PDT) Received: from google.com (243.199.238.35.bc.googleusercontent.com. [35.238.199.243]) by smtp.gmail.com with ESMTPSA id f11sm2704647iov.9.2021.05.07.12.08.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 May 2021 12:08:05 -0700 (PDT) Date: Fri, 7 May 2021 19:08:03 +0000 From: Dennis Zhou To: Oliver Sang , Roman Gushchin Cc: Pratik Sampat , LKML , "lkp@lists.01.org" , "lkp@intel.com" , "ying.huang@intel.com" , "feng.tang@intel.com" , "zhengjun.xing@intel.com" Subject: Re: [percpu] ace7e70901: aim9.sync_disk_rw.ops_per_sec -2.3% regression Message-ID: References: <20210427073448.GD32408@xsang-OptiPlex-9020> <40632FBD-8874-4B6C-A945-F2EBC96CF12B@fb.com> <20210507030606.GA27263@xsang-OptiPlex-9020> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 07, 2021 at 10:52:22AM -0700, Roman Gushchin wrote: > On Fri, May 07, 2021 at 11:06:06AM +0800, Oliver Sang wrote: > > hi Roman, > > > > On Thu, May 06, 2021 at 12:54:59AM +0000, Roman Gushchin wrote: > > > Ping > > > > sorry for late. > > > > the new patch makes the performance a little better but still has > > 1.9% regression comparing to > > f183324133 ("percpu: implement partial chunk depopulation") > > Hi Oliver! > > Thank you for testing it! > > Btw, can you, please, confirm that the regression is coming specifically > from ace7e70901 ("percpu: use reclaim threshold instead of running for every page")? > I do see *some* regression in my setup, but the data is very noisy, so I'm not sure > I can confirm it. > > Thanks! Thanks Oliver and Roman. If this is the case, I'll drop the final patch and just merge up to f183324133 ("percpu: implement partial chunk depopulation") into for-next as this is v5.14 anyway. Oliver, is there a way to trigger the kernel test robot for a specific test? Thanks, Dennis