From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f69.google.com (mail-wm0-f69.google.com [74.125.82.69]) by kanga.kvack.org (Postfix) with ESMTP id 697776B025F for ; Tue, 3 Oct 2017 11:23:20 -0400 (EDT) Received: by mail-wm0-f69.google.com with SMTP id i124so5046407wmf.7 for ; Tue, 03 Oct 2017 08:23:20 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id p49si998642eda.49.2017.10.03.08.23.18 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 03 Oct 2017 08:23:19 -0700 (PDT) Subject: Re: [PATCH v9 06/12] mm: zero struct pages during initialization References: <20170920201714.19817-1-pasha.tatashin@oracle.com> <20170920201714.19817-7-pasha.tatashin@oracle.com> <20171003130857.vohli6lnqj4tdmhl@dhcp22.suse.cz> From: Pasha Tatashin Message-ID: <73ea1215-7aa2-39e1-b820-30f58119183e@oracle.com> Date: Tue, 3 Oct 2017 11:22:35 -0400 MIME-Version: 1.0 In-Reply-To: <20171003130857.vohli6lnqj4tdmhl@dhcp22.suse.cz> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, kasan-dev@googlegroups.com, borntraeger@de.ibm.com, heiko.carstens@de.ibm.com, davem@davemloft.net, willy@infradead.org, ard.biesheuvel@linaro.org, mark.rutland@arm.com, will.deacon@arm.com, catalin.marinas@arm.com, sam@ravnborg.org, mgorman@techsingularity.net, steven.sistare@oracle.com, daniel.m.jordan@oracle.com, bob.picco@oracle.com On 10/03/2017 09:08 AM, Michal Hocko wrote: > On Wed 20-09-17 16:17:08, Pavel Tatashin wrote: >> Add struct page zeroing as a part of initialization of other fields in >> __init_single_page(). >> >> This single thread performance collected on: Intel(R) Xeon(R) CPU E7-8895 >> v3 @ 2.60GHz with 1T of memory (268400646 pages in 8 nodes): >> >> BASE FIX >> sparse_init 11.244671836s 0.007199623s >> zone_sizes_init 4.879775891s 8.355182299s >> -------------------------- >> Total 16.124447727s 8.362381922s > > Hmm, this is confusing. This assumes that sparse_init doesn't zero pages > anymore, right? So these number depend on the last patch in the series? Correct, without the last patch sparse_init time won't change. Pasha -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org