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=-7.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 4C833C37120 for ; Mon, 21 Jan 2019 21:25:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D25C2089F for ; Mon, 21 Jan 2019 21:25:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MMhRqtha" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727785AbfAUVZW (ORCPT ); Mon, 21 Jan 2019 16:25:22 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:53683 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727597AbfAUVZW (ORCPT ); Mon, 21 Jan 2019 16:25:22 -0500 Received: by mail-wm1-f66.google.com with SMTP id d15so12193233wmb.3; Mon, 21 Jan 2019 13:25:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=7RtVWnI7IlB/Hix+NvRDOmFAi75yUvewN2ZyW5xLqYc=; b=MMhRqthamkozvZX6NByVgJP7saX9eD80xi7/JkKLyWVgoHx03bdkA7GZ97da8yBHd8 OiXmTyg/OuRPjcQ3JiMR3Zz5J+2oB9cDs+WI5pCWzaY/5467JlhQKA5dQAUk0VhLoUu7 MFJzsa3mlC2o/CNtGMhgE4gZ9c5D861UtkCd42e6TCmATJfMz/evy7XDvniVPuYPrtoV R3/NWtDKkvgg5ZANLiZbbYIhoZ68UFH5FiQDouul5sEmoJaG3ssGgQxiW7J0DPQW5ZBk dLBQpvgJ4X56hShwt/wbPQlGUfQRPKkbtPPUkZPaoIxhDL/hCY7wUC/fwwe54JEyC+qP Isew== 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:user-agent; bh=7RtVWnI7IlB/Hix+NvRDOmFAi75yUvewN2ZyW5xLqYc=; b=OzxpOjGp9oLfI4wJ2IHwYZKVGhQqWVAR3RmariJuQsZQ8xry+j73niJHprSMuWFH9F yUIStWsbeDPNrvV1y2vNWkAkgqucK5skHzaVoehFnSIVghKV4o+7v0xgnpQaPKtn+5mH QABOYnbsjTagZhEv/w3Kg55MZe6Vi+3lZcKJdMdEPR6qY3P4Yylfq690tdtkfV9exc2K jxIRHWgHHltA9kWEd9wrpVnwuX+UMRghhFREoqSYsnP3nczzdkOud1/mfV82exmGsf+0 QFs5qtjaNF/sG2O5cCqaot+PwWTwGSWF69ZHCqyWyW0vWTYVrOHsmyFSJse9+oummX51 iJZA== X-Gm-Message-State: AJcUukcEShZ8WENjq0lEIUWE+5+g9WWxZ4Cgw1pYhhk7NeqqzG4sJUC8 vbVSBeheVemRxzfr8LFw7A== X-Google-Smtp-Source: ALg8bN6nGHilyvsvwLcTiGPMJ/N0snBFSy//cK7LZC6/QpPBhdlX6KbQ5PE2WuA5Xg6u1n2WCy4bgQ== X-Received: by 2002:a7b:c1d7:: with SMTP id a23mr927468wmj.48.1548105919932; Mon, 21 Jan 2019 13:25:19 -0800 (PST) Received: from avx2 ([46.53.246.246]) by smtp.gmail.com with ESMTPSA id s8sm108333112wrn.44.2019.01.21.13.25.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 21 Jan 2019 13:25:18 -0800 (PST) Date: Tue, 22 Jan 2019 00:25:15 +0300 From: Alexey Dobriyan To: Kees Cook Cc: kernel test robot , Waiman Long , Andrew Morton , Luis Chamberlain , Jonathan Corbet , LKML , "open list:DOCUMENTATION" , "linux-fsdevel@vger.kernel.org" , Davidlohr Bueso , Miklos Szeredi , Daniel Colascione , Dave Chinner , Randy Dunlap , LKP Subject: Re: [LKP] [/proc/stat] 3047027b34: reaim.jobs_per_min -4.8% regression Message-ID: <20190121212515.GA18118@avx2> References: <1546873978-27797-3-git-send-email-longman@redhat.com> <20190118084456.GA10690@shao2-debian> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Tue, Jan 22, 2019 at 09:02:53AM +1300, Kees Cook wrote: > On Fri, Jan 18, 2019 at 9:44 PM kernel test robot wrote: > > > > Greeting, > > > > FYI, we noticed a -4.8% regression of reaim.jobs_per_min due to commit: > > > > > > commit: 3047027b34b8c6404b509903058b89836093acc7 ("[PATCH 2/2] /proc/stat: Add sysctl parameter to control irq counts latency") > > url: https://github.com/0day-ci/linux/commits/Waiman-Long/proc-stat-Reduce-irqs-counting-performance-overhead/20190108-104818 > > Is this expected? (And it seems like other things in the report below > are faster? I don't understand why this particular regression was > called out?) No, but the sysctl has been dropped, so the point is moot.