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=-17.9 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1,USER_IN_DEF_DKIM_WL 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 21902C388F9 for ; Fri, 23 Oct 2020 19:29:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A631F22210 for ; Fri, 23 Oct 2020 19:29:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Kn6H6LbR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754016AbgJWT3D (ORCPT ); Fri, 23 Oct 2020 15:29:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753879AbgJWT3D (ORCPT ); Fri, 23 Oct 2020 15:29:03 -0400 Received: from mail-pl1-x644.google.com (mail-pl1-x644.google.com [IPv6:2607:f8b0:4864:20::644]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 39D7BC0613CE for ; Fri, 23 Oct 2020 12:29:03 -0700 (PDT) Received: by mail-pl1-x644.google.com with SMTP id 1so1473794ple.2 for ; Fri, 23 Oct 2020 12:29:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version:content-id; bh=Ht9BKFglKWwx9V8O4cpGYaHYegYy2q/TklC9j3VH7e8=; b=Kn6H6LbRvoW9Kgkcb1FkKc38czFd5R+J+DU4pE4S5dGQNA4IOqXIQXTvdcNCP/FwsC l4Xw4gq8q5kblhUggqxXTUn64mPVeHRrv1IK5UViv6egZjYtvekap5202lcVf+D0uuK8 V6IYZk4Yr/janF70nxfZBtAD2B3WWh7plzKnAfXoRi2L+NCQWbraQ0HIxCVAKvfdfMm+ Us6hhNgy6pG4czD+ocLsNYJTaZ/qgXcRz7IJ4HO3wmEG6zDwblDVlL3arCQuCeoiMjfm lz+AZmUC+s4VHWI9SFp1ntB9V1MYSSLU5LQwgPtnLtp34QhlR9r6kyuyzrYILTpC91/D f7Dg== 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:in-reply-to:message-id :references:user-agent:mime-version:content-id; bh=Ht9BKFglKWwx9V8O4cpGYaHYegYy2q/TklC9j3VH7e8=; b=rgdcBtdrQgTUYXlTv00M1vpybYquqUpd/q/WennRvoRm6gVIxnHSq8KyqzzGf1TAGQ unal9wKUdS6dNpxyeV1P3DlqThkTpDdLKyWMEnBPVqua68TnUmlgxvTn9iwxybO+Z+tM mwdcd9p1p5SAbVBJKVHmtJJlQghRQSUdqnyuCaM/4GUxiJ7A7UELXgSUKT+cVFs+RlUe dO3G9dY3z+Xaq6B6dYdmWHcyZZIvqchVxAz+oTIKtg0oCjPpYjvZeyqoC8MF3CynRECO hCY6pmTV6za3z8ipQ8owb6A6b1HxodwoIAisy3+BhyZDeyn+5cHpPEiAM4oYC7BCkFef mjyA== X-Gm-Message-State: AOAM531Xz0C4hCHLkM28Xuc4jZp0YgXCvWpf8RXoY5nxWk4bDIKTMh7E 0VHhgyG2E12sCsSnoht/WdbOqg== X-Google-Smtp-Source: ABdhPJwFgHM8eOx1L7iJqpP/Z0i76NT224Lmtie2/hw/XpQvqykmtkrXRbEI4J1ZERve6YFtpvOX7Q== X-Received: by 2002:a17:902:6545:b029:d3:d1fc:ff28 with SMTP id d5-20020a1709026545b02900d3d1fcff28mr437096pln.34.1603481342465; Fri, 23 Oct 2020 12:29:02 -0700 (PDT) Received: from [2620:15c:17:3:4a0f:cfff:fe51:6667] ([2620:15c:17:3:4a0f:cfff:fe51:6667]) by smtp.gmail.com with ESMTPSA id j11sm2789689pfh.143.2020.10.23.12.29.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Oct 2020 12:29:01 -0700 (PDT) Date: Fri, 23 Oct 2020 12:29:00 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: kernel test robot , Axel Rasmussen , Kevin Ko cc: David Hildenbrand , Linus Torvalds , Andrew Morton , Vlastimil Babka , Oscar Salvador , Wei Yang , Pankaj Gupta , Michal Hocko , Alexander Duyck , Mel Gorman , Dave Hansen , Mike Rapoport , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Matthew Wilcox , Michael Ellerman , Michal Hocko , Scott Cheloha , LKML , lkp@lists.01.org, lkp@intel.com, ying.huang@intel.com, feng.tang@intel.com, zhengjun.xing@intel.com Subject: Re: [mm/page_alloc] 7fef431be9: vm-scalability.throughput 87.8% improvement In-Reply-To: <20201021092417.GP11647@shao2-debian> Message-ID: References: <20201021092417.GP11647@shao2-debian> User-Agent: Alpine 2.23 (DEB 453 2020-06-18) MIME-Version: 1.0 Content-Type: text/plain; CHARSET=US-ASCII Content-ID: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 21 Oct 2020, kernel test robot wrote: > Greeting, > > FYI, we noticed a 87.8% improvement of vm-scalability.throughput due to commit: > > > commit: 7fef431be9c9ac255838a9578331567b9dba4477 ("mm/page_alloc: place pages to tail in __free_pages_core()") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master > > > in testcase: vm-scalability > on test machine: 192 threads Intel(R) Xeon(R) Platinum 9242 CPU @ 2.30GHz with 192G memory > with following parameters: > > runtime: 300s > size: 512G > test: anon-wx-rand-mt > cpufreq_governor: performance > ucode: 0x5002f01 > > test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us. > test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/ > I'm curious why we are not able to reproduce this improvement on Skylake and actually see a slight performance degradation, at least for 300s_128G_truncate_throughput. Axel Rasmussen can provide more details on our results.