From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751454AbdJCQCq (ORCPT ); Tue, 3 Oct 2017 12:02:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56734 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750787AbdJCQCo (ORCPT ); Tue, 3 Oct 2017 12:02:44 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 0AA7881E1C Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=riel@redhat.com Message-ID: <1507046561.10046.22.camel@redhat.com> Subject: Re: sysbench throughput degradation in 4.13+ From: Rik van Riel To: Peter Zijlstra , Matt Fleming Cc: Eric Farman , ????????? , LKML , jhladky@redhat.com, Ingo Molnar , Christian Borntraeger , "KVM-ML (kvm@vger.kernel.org)" , vcaputo@pengaru.com, Matthew Rosato Date: Tue, 03 Oct 2017 12:02:41 -0400 In-Reply-To: <20171003083932.3qa7jw2spmi5n5pg@hirez.programming.kicks-ass.net> References: <95edafb1-5e9d-8461-db73-bcb002b7ebef@linux.vnet.ibm.com> <50a279d3-84eb-3403-f2f0-854934778037@linux.vnet.ibm.com> <20170922155348.zujigkn3o5eylctn@hirez.programming.kicks-ass.net> <754f5a9f-5332-148d-2631-918fc7a7cfe9@linux.vnet.ibm.com> <20170927093530.s3sgdz2vamc5ka4w@hirez.programming.kicks-ass.net> <20170927135820.61cd077f@cuia.usersys.redhat.com> <20171002225312.GA24578@codeblueprint.co.uk> <20171003083932.3qa7jw2spmi5n5pg@hirez.programming.kicks-ass.net> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-woq1u+T9Pb8E4KdMKN8+" Mime-Version: 1.0 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 03 Oct 2017 16:02:44 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-woq1u+T9Pb8E4KdMKN8+ Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, 2017-10-03 at 10:39 +0200, Peter Zijlstra wrote: > On Mon, Oct 02, 2017 at 11:53:12PM +0100, Matt Fleming wrote: > > On Wed, 27 Sep, at 01:58:20PM, Rik van Riel wrote: > > >=20 > > > I like the simplicity of your approach!=C2=A0=C2=A0I hope it does not= break > > > stuff like netperf... > > >=20 > > > I have been working on the patch below, which is much less > > > optimistic > > > about when to do an affine wakeup than before. > >=20 > > Running netperf for this patch and Peter's patch shows that Peter's > > comes out on top, with scores pretty close to v4.12 in most places > > on > > my 2-NUMA node 48-CPU Xeon box. > >=20 > > I haven't dug any further into why v4.13-peterz+ is worse than > > v4.12, > > but I will next week. >=20 > So I was waiting for Rik, who promised to run a bunch of NUMA > workloads > over the weekend. >=20 > The trivial thing regresses a wee bit on the overloaded case, I've > not > yet tried to fix it. In Jirka's tests, your simple patch also came out on top. --=20 All rights reversed --=-woq1u+T9Pb8E4KdMKN8+ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABCAAGBQJZ07ShAAoJEM553pKExN6Dmn8IALGwCgQBKn74fhmScXEJMlTo KEurC9KkFw9Fe8lr1XEyzHo1TzAOaCt/fSZva6C3vPeS6IJ1biUjZsQ0ko39AId1 qNL93wXDzqvRUPtEvcxXx7VpcdprnRIp0PL2g6HTfyFT8H6c4+61xuXHTSVSPx8p j49aZgy/DOdekcvQod63NdPezT4OWyWkGxxHnAO73f4XOW0+TzaPHPh6BRKBOW+L luc7xnEw8zZuMk4E89xea1spii47KzP0KBFNMOqyQ+smbWBD2X9o8uJMhMNR0XpQ 0G0m6ubYG4qyfCdem2cXmG+AVBbCGnRU6q3hFBzRE1TLVjqFaIjHPE1R5i8DG/A= =WZHH -----END PGP SIGNATURE----- --=-woq1u+T9Pb8E4KdMKN8+--