Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752034AbaGaQ1W (ORCPT ); Thu, 31 Jul 2014 12:27:22 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:49750 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750973AbaGaQ1N (ORCPT ); Thu, 31 Jul 2014 12:27:13 -0400 Date: Thu, 31 Jul 2014 18:27:02 +0200 From: Peter Zijlstra To: Jirka Hladky Cc: Rik van Riel , Aaron Lu , LKML , lkp@01.org Subject: Re: [LKP] [sched/numa] a43455a1d57: +94.1% proc-vmstat.numa_hint_faults_local Message-ID: <20140731162702.GZ19379@twins.programming.kicks-ass.net> References: <53d70ee6.JsUEmW5dWsv8dev+%fengguang.wu@intel.com> <53D72FF5.90908@intel.com> <20140729023940.37b6aebc@annuminas.surriel.com> <20140731104241.GA9918@twins.programming.kicks-ass.net> <20140731155723.GY3588@twins.programming.kicks-ass.net> <53DA6BDA.8080000@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="My06KtENIn8d38lB" Content-Disposition: inline In-Reply-To: <53DA6BDA.8080000@redhat.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --My06KtENIn8d38lB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jul 31, 2014 at 06:16:26PM +0200, Jirka Hladky wrote: > On 07/31/2014 05:57 PM, Peter Zijlstra wrote: > >On Thu, Jul 31, 2014 at 12:42:41PM +0200, Peter Zijlstra wrote: > >>On Tue, Jul 29, 2014 at 02:39:40AM -0400, Rik van Riel wrote: > >>>On Tue, 29 Jul 2014 13:24:05 +0800 > >>>Aaron Lu wrote: > >>> > >>>>FYI, we noticed the below changes on > >>>> > >>>>git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git mas= ter > >>>>commit a43455a1d572daf7b730fe12eb747d1e17411365 ("sched/numa: Ensure = task_numa_migrate() checks the preferred node") > >>>> > >>>>ebe06187bf2aec1 a43455a1d572daf7b730fe12e > >>>>--------------- ------------------------- > >>>> 94500 ~ 3% +115.6% 203711 ~ 6% ivb42/hackbench/50%-thre= ads-pipe > >>>> 67745 ~ 4% +64.1% 111174 ~ 5% lkp-snb01/hackbench/50%-= threads-socket > >>>> 162245 ~ 3% +94.1% 314885 ~ 6% TOTAL proc-vmstat.numa_h= int_faults_local > >>>Hi Aaron, > >>> > >>>Jirka Hladky has reported a regression with that changeset as > >>>well, and I have already spent some time debugging the issue. > >>Let me see if I can still find my SPECjbb2005 copy to see what that > >>does. > >Jirka, what kind of setup were you seeing SPECjbb regressions? > > > >I'm not seeing any on 2 sockets with a single SPECjbb instance, I'll go > >check one instance per socket now. > > > > > Peter, I'm seeing regressions for >=20 > SINGLE SPECjbb instance for number of warehouses being the same as total > number of cores in the box. >=20 > Example: 4 NUMA node box, each CPU has 6 cores =3D> biggest regression is= for > 24 warehouses. IVB-EP: 2 node, 10 cores, 2 thread per core: tip/master+origin/master: Warehouses Thrput 4 196781 8 358064 12 511318 16 589251 20 656123 24 710789 28 765426 32 787059 36 777899 * 40 748568 =20 Throughput 18258 =20 Warehouses Thrput 4 201598 8 363470 12 512968 16 584289 20 605299 24 720142 28 776066 32 791263 36 776965 * 40 760572 =20 Throughput 18551 =20 tip/master+origin/master-a43455a1d57 SPEC scores = =20 Warehouses Thrput 4 198667 8 362481 12 503344 16 582602 20 647688 24 731639 28 786135 32 794124 36 774567 * 40 757559 =20 Throughput 18477 =20 Given that there's fairly large variance between the two runs with the commit in, I'm not sure I can say there's a problem here. The one run without the patch is more or less between the two runs with the patch. And doing this many runs takes ages, so I'm not tempted to either make the runs longer or do more of them. Lemme try on a 4 node box though, who knows. --My06KtENIn8d38lB Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJT2m5WAAoJEHZH4aRLwOS6GoQQAIe8KwcQxgmLFLDvbjBwbNRi Pu/duTQfNLDjMsiwNfbXh1RzJIdy3OLHjYJ0fK+Ucgrkl1jH+qH/CjpX3yd5EELg x4sUf9KACxpU795vZ0W6NGhVPSP4+50vrDmYdJdigC+BbNsCBWdAjUxguHsZYNkt C6RXjWCCTpewdkTQFyjRPSdO0uRce2PKi/m5EpI+n32WNpnFs0jQQrIBqXzYp3Du ERtPBkjUpHvvE5Wwo0efi1DVUNz+yBt/i0YeUcYpSi2OnHIvp2n0lzJWl7rHQv0e //siXRFVBnJSxP2weycOvTr60YJCK1Ki2xRxLAq1EVKFLDLZUvaaN3uYhKPqIDC4 LalgU/VX1LsRCIRDOzkfBnIUOGi/aG974XytqStAWuw6m2zY6VmdZ/i2lVpSyk45 WPUzFs4SS2gi38EV/Ofg/XrWnmT+fhkrf9URqMCE0NZv02C8ZSQHyhwH2sd6Hf0F AjH/HKJ0OAg82WP+TI5C52LsX9moIvl2tRcNGOxXr3BHkkAD28m/lNn/5a5fwH+i hrPv9lKAFJWBlN0Q7FWNmfkqULGHy9kknZ3uuoKxk97XbdtqinE+SnpG8FpEt4W6 mX4w4/asWrGbUTAL1dgCHU3x3G6tYDcqLkvf7XmzIEuHCawROdl6abDDyEQHwgFd jjGWZeCS80KRLzFRM/Y6 =0uGq -----END PGP SIGNATURE----- --My06KtENIn8d38lB-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/