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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id DFE43C4332F for ; Fri, 2 Dec 2022 06:43:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5E9B16B0073; Fri, 2 Dec 2022 01:43:20 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 573306B0075; Fri, 2 Dec 2022 01:43:20 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 413256B0078; Fri, 2 Dec 2022 01:43:20 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 2DEDB6B0073 for ; Fri, 2 Dec 2022 01:43:20 -0500 (EST) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id F29C61205DF for ; Fri, 2 Dec 2022 06:43:19 +0000 (UTC) X-FDA: 80196424518.20.64F33EF Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) by imf10.hostedemail.com (Postfix) with ESMTP id 64414C0006 for ; Fri, 2 Dec 2022 06:43:19 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf10.hostedemail.com: domain of regressions@leemhuis.info designates 80.237.130.52 as permitted sender) smtp.mailfrom=regressions@leemhuis.info ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1669963399; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UmLqUSwvQTdkV3HAzUYJMVTpz7sQ2IAiXtxw0qBtP4s=; b=Z+8/f3FzVLhea52pB6X7d67nMioiwDpE9DfVKvchHmlBB8/qpTcQgZjOz1cKm7RwGa+W9m bkfljhPGu/vIbbykcJGUJNKB/ERuLKW0BTVa00c3w8VZtQPFaMFchkRydPVgnSV4jgTXjV p/cufgMajbuha+3RmE5z/oqkUOGbDLk= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1669963399; a=rsa-sha256; cv=none; b=YWILGEXvffL7IrQks09Xcx1W340gQERw8Y0gM07OATQq9hNnWiuuYiV4Q21jHYwupcv6QO s6YWM8ibWhqdwZ6fiWPxiEv6vm8eeMtL4D71PWB4pRgSfc9R4MTjLXeinGb38bnMEEpga5 dSy9HCjVD5IGCsr+O36wBjzfJzD5eLw= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf10.hostedemail.com: domain of regressions@leemhuis.info designates 80.237.130.52 as permitted sender) smtp.mailfrom=regressions@leemhuis.info Received: from [2a02:8108:963f:de38:eca4:7d19:f9a2:22c5]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1p0zlV-0000PL-Kq; Fri, 02 Dec 2022 07:43:17 +0100 Message-ID: <8d2dbbb5-5816-c1e9-e98c-6c64a8d85f81@leemhuis.info> Date: Fri, 2 Dec 2022 07:43:17 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.1 Subject: Re: [mm] f35b5d7d67: will-it-scale.per_process_ops -95.5% regression #forregzbot Content-Language: en-US, de-DE From: Thorsten Leemhuis To: "regressions@lists.linux.dev" Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <202210181535.7144dd15-yujie.liu@intel.com> <87edv4r2ip.fsf@yhuang6-desk2.ccr.corp.intel.com> <84964891-5a39-adb2-3093-54b716ca94ae@leemhuis.info> In-Reply-To: <84964891-5a39-adb2-3093-54b716ca94ae@leemhuis.info> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1669963399;c9588390; X-HE-SMSGID: 1p0zlV-0000PL-Kq X-Stat-Signature: o3paaqwrq6sicwyx6awas19nkyu5k45b X-Spamd-Result: default: False [0.79 / 9.00]; SUBJECT_HAS_UNDERSCORES(1.00)[]; R_SPF_ALLOW(-0.20)[+ip4:80.237.130.0/24]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[text/plain]; BAYES_HAM(-0.01)[46.46%]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_SOME(0.00)[]; ARC_SIGNED(0.00)[hostedemail.com:s=arc-20220608:i=1]; DMARC_NA(0.00)[leemhuis.info]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_EQ_ADDR_SOME(0.00)[] X-Rspamd-Queue-Id: 64414C0006 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1669963399-715179 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000452, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 29.11.22 09:59, Thorsten Leemhuis wrote: > [Note: this mail is primarily send for documentation purposes and/or for > regzbot, my Linux kernel regression tracking bot. That's why I removed > most or all folks from the list of recipients, but left any that looked > like a mailing lists. These mails usually contain '#forregzbot' in the > subject, to make them easy to spot and filter out.] > > On 20.10.22 06:23, Nathan Chancellor wrote: >> [...] >> For what it's worth, I just bisected a massive and visible performance >> regression on my Threadripper 3990X workstation to commit f35b5d7d676e >> ("mm: align larger anonymous mappings on THP boundaries"), which seems >> directly related to this report/analysis. I initially noticed this >> because my full set of kernel builds against mainline went from 2 hours >> and 20 minutes or so to over 3 hours. Zeroing in on x86_64 allmodconfig, >> which I used for the bisect: > > Thanks for the report. To be sure below issue doesn't fall through the > cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression > tracking bot: > > #regzbot ^introduced f35b5d7d676e59e4 > #regzbot title performance: mm: building Linux with clang takes a lot > longer (~27 %) > #regzbot ignore-activity #regzbot fix: revert "mm: align larger anonymous mappings on THP boundaries" Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) P.S.: As the Linux kernel's regression tracker I deal with a lot of reports and sometimes miss something important when writing mails like this. If that's the case here, don't hesitate to tell me in a public reply, it's in everyone's interest to set the public record straight.