From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============7088007212301405224==" MIME-Version: 1.0 From: Kees Cook To: lkp@lists.01.org Subject: Re: [PCI] dc83615370: will-it-scale.per_process_ops -1.2% regression Date: Tue, 12 Jan 2021 09:30:46 -0800 Message-ID: <202101120927.B3345B30@keescook> In-Reply-To: <20210112141045.GD30747@xsang-OptiPlex-9020> List-Id: --===============7088007212301405224== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Tue, Jan 12, 2021 at 10:10:45PM +0800, kernel test robot wrote: > FYI, we noticed a -1.2% regression of will-it-scale.per_process_ops due t= o commit: > = > commit: dc83615370e7ebcb181a21a8ad13a77c278ab81c ("PCI: Fix PREL32 reloca= tions for LTO") > https://git.kernel.org/cgit/linux/kernel/git/kees/linux.git for-next/kspp O_o Well that's surprising. This only creates stubs. > will-it-scale.workload = = > = = > 2.14e+07 +-------------------------------------------------------------= ---+ = > |.+. .+ : + +.+. +.+. .+ +.+. .+ : = | = > 2.13e+07 |-+ + : +.+ + + + + : = | = > | : : + .+.+..+. .+ +. = | = > 2.12e+07 |-+ : : + + += .+.| = > | +.+ = | = > 2.11e+07 |-+ = | = > | = | = > 2.1e+07 |-+ O O O O O O O = | = > | O O O O O O O O O = | = > 2.09e+07 |-+ O = | = > | O O = | = > 2.08e+07 |-O O O O O = | = > | = | = > 2.07e+07 +-------------------------------------------------------------= ---+ = > = = > = = > [*] bisect-good sample > [O] bisect-bad sample But it's pretty clear _something_ has happened. We'll investigate... -- = Kees Cook --===============7088007212301405224==-- 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=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 3B1ABC433E0 for ; Tue, 12 Jan 2021 17:31:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 075FB22AED for ; Tue, 12 Jan 2021 17:31:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392852AbhALRb3 (ORCPT ); Tue, 12 Jan 2021 12:31:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728411AbhALRb3 (ORCPT ); Tue, 12 Jan 2021 12:31:29 -0500 Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E060EC061575 for ; Tue, 12 Jan 2021 09:30:48 -0800 (PST) Received: by mail-pg1-x52b.google.com with SMTP id n7so1888826pgg.2 for ; Tue, 12 Jan 2021 09:30:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=XdTRu5tlj/A3yBDzJivXQhUbmV9kR2B6mc01lpwlJu8=; b=RZ/5dMMonUTO9uwDF4pLhzmX9iV9siHtpHS8tn8hJcEmD4EfymPs2hg5s1T9cx0ATz dLpYTPPbyoRxH3P5VSLCIVFmj9tnEVansZQL2IJJmKQR6dZNa9AmudWjqHSQTBn5Gqu3 nGJ0JffzpNvhC03FDQe8N1JqYgLXogyfShpwE= 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=XdTRu5tlj/A3yBDzJivXQhUbmV9kR2B6mc01lpwlJu8=; b=rnH8kbgarp7Q5903p6YkJH4RfYu0LZil5LhirtT/RCMI1a8o184gAd0/8W9fsSc00C 5ttp6Dirky2sn2keWTFxC5SnRZshtniOmLnOvjd9utU1nKoOxXJ4HGHvfWV71DOgz3mZ b9yBpKGPm9zefG+dEpomcWd4tiWK5P1wmhldDOQtBX7lcjEAVNI/j5eHOgAryOKFxmPx JbftSBsxH92wHJs9GZmc08zJQnZRugc/U8rh4f5mhsMJVwjN9vpNxUoKG+um2TDtpJ2b AD3L2/9PK0qcnfezTGJUUo7YuRdlpf/V8Worfc0T1Zl+zB2sv9sdvYdWNqvH9iCwo0qx kQ3Q== X-Gm-Message-State: AOAM532eT3UTZnmY6z0k2LBGsHbdaEs49zTtzps+0MjGLXYvAXe35ht8 QuuB8CpdPJpJrUuex5oWSKjUIAYj7bvAmA== X-Google-Smtp-Source: ABdhPJzMKQx3DoJR2OewHw8Nh5bUmiaIAGtOtMJzX2jEh38fP63P0Grlpv6Y89dXjIkc2LEhFcqxcQ== X-Received: by 2002:a63:6e8f:: with SMTP id j137mr126332pgc.416.1610472648419; Tue, 12 Jan 2021 09:30:48 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id g16sm3502796pfh.187.2021.01.12.09.30.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jan 2021 09:30:47 -0800 (PST) Date: Tue, 12 Jan 2021 09:30:46 -0800 From: Kees Cook To: kernel test robot Cc: Sami Tolvanen , Bjorn Helgaas , LKML , lkp@lists.01.org, lkp@intel.com, ying.huang@intel.com, feng.tang@intel.com, zhengjun.xing@intel.com Subject: Re: [PCI] dc83615370: will-it-scale.per_process_ops -1.2% regression Message-ID: <202101120927.B3345B30@keescook> References: <20210112141045.GD30747@xsang-OptiPlex-9020> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210112141045.GD30747@xsang-OptiPlex-9020> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 12, 2021 at 10:10:45PM +0800, kernel test robot wrote: > FYI, we noticed a -1.2% regression of will-it-scale.per_process_ops due to commit: > > commit: dc83615370e7ebcb181a21a8ad13a77c278ab81c ("PCI: Fix PREL32 relocations for LTO") > https://git.kernel.org/cgit/linux/kernel/git/kees/linux.git for-next/kspp O_o Well that's surprising. This only creates stubs. > will-it-scale.workload > > 2.14e+07 +----------------------------------------------------------------+ > |.+. .+ : + +.+. +.+. .+ +.+. .+ : | > 2.13e+07 |-+ + : +.+ + + + + : | > | : : + .+.+..+. .+ +. | > 2.12e+07 |-+ : : + + +.+.| > | +.+ | > 2.11e+07 |-+ | > | | > 2.1e+07 |-+ O O O O O O O | > | O O O O O O O O O | > 2.09e+07 |-+ O | > | O O | > 2.08e+07 |-O O O O O | > | | > 2.07e+07 +----------------------------------------------------------------+ > > > [*] bisect-good sample > [O] bisect-bad sample But it's pretty clear _something_ has happened. We'll investigate... -- Kees Cook