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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5CCE9C77B7C for ; Tue, 9 May 2023 06:55:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235113AbjEIGzP (ORCPT ); Tue, 9 May 2023 02:55:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235175AbjEIGy7 (ORCPT ); Tue, 9 May 2023 02:54:59 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B0ECAD2E for ; Mon, 8 May 2023 23:54:37 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id d9443c01a7336-1aaf70676b6so38411065ad.3 for ; Mon, 08 May 2023 23:54:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fromorbit-com.20221208.gappssmtp.com; s=20221208; t=1683615277; x=1686207277; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=8f7AFFRkXXKxkzsTH7JfwHgWYybfOeRANzMf6aB4GvY=; b=oS/3s1VQfCdROM7w06UUy1feQDAkekR15S+W+Lck1hb5ImBoiw9PTJrGHvLGdhTWxX YIO5QVFOI+XUkjxUqxVV3Jqo2HpFqpr0K5ZFfmXsTsaGMWK05+dMdJyyfOOjAoqu9k0M GO33YahzUNlU+1+5U7niPyeqwzkzx/fVZs7IEsHtO22XI+sIS4ZGG2JF9rogkh2/8Q64 pJ2AA1fb4Lyq/cQl6LGsYw5vjhO7zc7/9CxueqbTm5gm8Zrb451c4H1g7aVDJKy5LfpF yP8zbgyeQlqJ/c47Q/1Woo4pxbo+jHEAqO2sNJGFYpVV8etIY3Of/UPdn8K3elJmevyL ZXVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683615277; x=1686207277; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=8f7AFFRkXXKxkzsTH7JfwHgWYybfOeRANzMf6aB4GvY=; b=SWFIYpz61wrjRzRJimf6jH+UwBTmTrp/noaatoZRmEKRdXmPgQOIVdovZyAnTHMK8W jPPTalCx/73TUR7A450I5han8ZO/ZIuEWQc5k6xhHx5IQzipIEOw0ZmCo7O2JEF5WTQD ayL6A2Gw7JKr+Xkrrr2u2B7Ru5Oj1nrtrH90llNuxvR2eKEqT/Ku6YFUYWyHw/uALzhL 4SN7neKMUBx/+KfmSFdJcnD74rzcbPWlACj9X1MD/X2VOpYQ1HlxpFF65d9zVTScNr2W PHGKTN12sMOGWn9VaGs+o9clYml6tsmHITcUaEBfpWJzOQcQhTesAmfLWVY3Xlgttit6 uZZA== X-Gm-Message-State: AC+VfDwHji8y8/z3uRpEMeVL182Nnf2gApAiaJ96mRn16yLavgbJuaHp eaMiZkfH1e/5RySnI1PLSQ9coA== X-Google-Smtp-Source: ACHHUZ7LdOHTKLDLgTu5Mf4elrCAwM8dbTu05hZuRJn2cRPKqYLnO0y9skDG4YG19caNlHilV8oKBA== X-Received: by 2002:a17:902:eb46:b0:1a6:5487:3f97 with SMTP id i6-20020a170902eb4600b001a654873f97mr12176228pli.64.1683615277073; Mon, 08 May 2023 23:54:37 -0700 (PDT) Received: from dread.disaster.area (pa49-181-88-204.pa.nsw.optusnet.com.au. [49.181.88.204]) by smtp.gmail.com with ESMTPSA id g7-20020a170902868700b001aad4be4503sm719394plo.2.2023.05.08.23.54.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 May 2023 23:54:36 -0700 (PDT) Received: from dave by dread.disaster.area with local (Exim 4.92.3) (envelope-from ) id 1pwHF3-00D7ut-QH; Tue, 09 May 2023 16:54:33 +1000 Date: Tue, 9 May 2023 16:54:33 +1000 From: Dave Chinner To: kernel test robot Cc: Dave Chinner , oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, "Darrick J. Wong" , linux-xfs@vger.kernel.org, ying.huang@intel.com, feng.tang@intel.com, fengwei.yin@intel.com Subject: Re: [linus:master] [xfs] 2edf06a50f: fsmark.files_per_sec -5.7% regression Message-ID: <20230509065433.GT3223426@dread.disaster.area> References: <202305090905.aff4e0e6-oliver.sang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202305090905.aff4e0e6-oliver.sang@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 09, 2023 at 10:13:19AM +0800, kernel test robot wrote: > > > Hello, > > kernel test robot noticed a -5.7% regression of fsmark.files_per_sec on: > > > commit: 2edf06a50f5bbe664283f3c55c480fc013221d70 ("xfs: factor xfs_alloc_vextent_this_ag() for _iterate_ags()") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master This is just a refactoring patch and doesn't change any logic. Hence I'm sceptical that it actually resulted in a performance regression. Indeed, the profile indicates a significant change of behaviour in the allocator and I can't see how the commit above would cause anything like that. Was this a result of a bisect? If so, what were the original kernel versions where the regression was detected? Cheers, Dave. -- Dave Chinner david@fromorbit.com