From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f70.google.com (mail-wm0-f70.google.com [74.125.82.70]) by kanga.kvack.org (Postfix) with ESMTP id B205F6B0038 for ; Wed, 30 Nov 2016 03:56:02 -0500 (EST) Received: by mail-wm0-f70.google.com with SMTP id w13so49358600wmw.0 for ; Wed, 30 Nov 2016 00:56:02 -0800 (PST) Received: from outbound-smtp07.blacknight.com (outbound-smtp07.blacknight.com. [46.22.139.12]) by mx.google.com with ESMTPS id p10si62778166wjb.172.2016.11.30.00.56.00 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Nov 2016 00:56:00 -0800 (PST) Received: from mail.blacknight.com (pemlinmail01.blacknight.ie [81.17.254.10]) by outbound-smtp07.blacknight.com (Postfix) with ESMTPS id 1C32A1C23F6 for ; Wed, 30 Nov 2016 08:56:00 +0000 (GMT) Date: Wed, 30 Nov 2016 08:55:59 +0000 From: Mel Gorman Subject: Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v3 Message-ID: <20161130085559.shfdy6mx6lx4fr3i@techsingularity.net> References: <20161127131954.10026-1-mgorman@techsingularity.net> <5621b386-ee65-0fa5-e217-334924412c7f@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <5621b386-ee65-0fa5-e217-334924412c7f@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: Andrew Morton , Christoph Lameter , Michal Hocko , Johannes Weiner , Linux-MM , Linux-Kernel On Mon, Nov 28, 2016 at 12:00:41PM +0100, Vlastimil Babka wrote: > > 1-socket 6 year old machine > > 4.9.0-rc5 4.9.0-rc5 > > vanilla hopcpu-v3 > > Hmean send-64 87.47 ( 0.00%) 127.14 ( 45.36%) > > Hmean send-128 174.36 ( 0.00%) 256.42 ( 47.06%) > > Hmean send-256 347.52 ( 0.00%) 509.41 ( 46.59%) > > Hmean send-1024 1363.03 ( 0.00%) 1991.54 ( 46.11%) > > Hmean send-2048 2632.68 ( 0.00%) 3759.51 ( 42.80%) > > Hmean send-3312 4123.19 ( 0.00%) 5873.28 ( 42.45%) > > Hmean send-4096 5056.48 ( 0.00%) 7072.81 ( 39.88%) > > Hmean send-8192 8784.22 ( 0.00%) 12143.92 ( 38.25%) > > Hmean send-16384 15081.60 ( 0.00%) 19812.71 ( 31.37%) > > Hmean recv-64 86.19 ( 0.00%) 126.59 ( 46.87%) > > Hmean recv-128 173.93 ( 0.00%) 255.21 ( 46.73%) > > Hmean recv-256 346.19 ( 0.00%) 506.72 ( 46.37%) > > Hmean recv-1024 1358.28 ( 0.00%) 1980.03 ( 45.77%) > > Hmean recv-2048 2623.45 ( 0.00%) 3729.35 ( 42.15%) > > Hmean recv-3312 4108.63 ( 0.00%) 5831.47 ( 41.93%) > > Hmean recv-4096 5037.25 ( 0.00%) 7021.59 ( 39.39%) > > Hmean recv-8192 8762.32 ( 0.00%) 12072.44 ( 37.78%) > > Hmean recv-16384 15042.36 ( 0.00%) 19690.14 ( 30.90%) > > That looks way much better than the "v1" RFC posting. Was it just because > you stopped doing the "at first iteration, use migratetype as index", and > initializing pindex UINT_MAX hits so much quicker, or was there something > more subtle that I missed? There was no changelog between "v1" and "v2". > FYI, the LKP test robot reported the following so there is some independent basis for picking this up. ---8<--- FYI, we noticed a +23.0% improvement of netperf.Throughput_Mbps due to commit: commit 79404c5a5c66481aa55c0cae685e49e0f44a0479 ("mm: page_alloc: High-order per-cpu page allocator") https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git mm-pagealloc-highorder-percpu-v3r1 -- Mel Gorman SUSE Labs -- 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