Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932924AbZKDVpa (ORCPT ); Wed, 4 Nov 2009 16:45:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932697AbZKDVl6 (ORCPT ); Wed, 4 Nov 2009 16:41:58 -0500 Received: from mail.gmx.net ([213.165.64.20]:53725 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S932701AbZKDVl5 (ORCPT ); Wed, 4 Nov 2009 16:41:57 -0500 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX18qBB1OciAqiDUqPZ/uetFme8NicjqeSyN+XVN5wz V7CszH8NLvF71c Subject: Re: [tip:sched/core] sched: Check for an idle shared cache in select_task_rq_fair() From: Mike Galbraith To: arjan@infradead.org Cc: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, stable@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@elte.hu, linux-tip-commits@vger.kernel.org In-Reply-To: <1257367035.9923.3.camel@marge.simson.net> References: <1256654138.17752.7.camel@marge.simson.net> <1257367035.9923.3.camel@marge.simson.net> Content-Type: text/plain Date: Wed, 04 Nov 2009 22:41:57 +0100 Message-Id: <1257370917.11327.7.camel@marge.simson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1.1 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 X-FuHaFi: 0.5600000000000001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2983 Lines: 51 On Wed, 2009-11-04 at 21:37 +0100, Mike Galbraith wrote: > On Wed, 2009-11-04 at 19:33 +0000, tip-bot for Mike Galbraith wrote: > > Commit-ID: a1f84a3ab8e002159498814eaa7e48c33752b04b > > Gitweb: http://git.kernel.org/tip/a1f84a3ab8e002159498814eaa7e48c33752b04b > > Author: Mike Galbraith > > AuthorDate: Tue, 27 Oct 2009 15:35:38 +0100 > > Committer: Ingo Molnar > > CommitDate: Wed, 4 Nov 2009 18:46:22 +0100 > > > > sched: Check for an idle shared cache in select_task_rq_fair() > > > > When waking affine, check for an idle shared cache, and if > > found, wake to that CPU/sibling instead of the waker's CPU. > > This one still wants some work. It's not playing well with 1b9508f. Still does want some work (on the tail), but those numbers were from a failed experiment kernel, not d995f1d. Below are the correct numbers. tip v2.6.32-rc6-1731-gc5bb4b1 mysql+oltp clients 1 2 4 8 16 32 64 128 256 tip 10447.14 19734.58 36038.18 35776.85 34662.76 33682.30 32256.22 28770.99 25323.23 10462.61 19580.14 36050.48 35942.63 35054.84 33988.40 32423.89 29259.65 25892.24 10501.02 19231.27 36007.03 35985.32 35060.79 33945.47 32400.42 29140.84 25716.16 tip avg 10470.25 19515.33 36031.89 35901.60 34926.13 33872.05 32360.17 29057.16 25643.87 tip v2.6.32-rc6-1731-gc5bb4b1 + 1b9508f (Rate-limit newidle) tip+ 10095.64 19989.67 36449.85 35923.98 35024.24 34026.61 32411.75 28965.77 27287.96 10764.98 19864.03 36632.78 36338.00 35610.52 34439.88 32942.57 29889.18 27426.12 10734.48 19572.63 36507.90 36236.36 35486.51 34443.86 32938.90 30136.39 27186.61 tip+ avg 10531.70 19808.77 36530.17 36166.11 35373.75 34303.45 32764.40 29663.78 27300.23 1.005 1.015 1.013 1.007 1.012 1.012 1.012 1.020 1.064 v2.6.32-rc6-1796-gd995f1d 10745.30 19684.71 36367.25 35890.25 34598.08 33672.37 32327.99 28744.09 25393.00 10549.41 19747.85 36778.96 36410.58 35531.90 34292.03 32603.66 29487.77 25351.09 10678.30 19944.74 36789.44 36403.78 35523.40 34267.10 32659.60 29359.59 25751.93 avg 10657.67 19792.43 36645.21 36234.87 35217.79 34077.16 32530.41 29197.15 25498.67 vs c5bb4b1 1.017 1.014 1.017 1.009 1.008 1.006 1.005 1.004 .994 Lost the tail gain, gained peak. Drink one, spill one, give one away. -Mike -- 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/