Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262813AbUC2L2s (ORCPT ); Mon, 29 Mar 2004 06:28:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262814AbUC2L2s (ORCPT ); Mon, 29 Mar 2004 06:28:48 -0500 Received: from smtp015.mail.yahoo.com ([216.136.173.59]:38560 "HELO smtp015.mail.yahoo.com") by vger.kernel.org with SMTP id S262813AbUC2L2q (ORCPT ); Mon, 29 Mar 2004 06:28:46 -0500 Message-ID: <40680868.2070800@yahoo.com.au> Date: Mon, 29 Mar 2004 21:28:40 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040122 Debian/1.6-1 X-Accept-Language: en MIME-Version: 1.0 To: Rick Lindsley CC: Andi Kleen , Ingo Molnar , jun.nakajima@intel.com, piggin@cyberone.com.au, linux-kernel@vger.kernel.org, akpm@osdl.org, kernel@kolivas.org, rusty@rustcorp.com.au, anton@samba.org, lse-tech@lists.sourceforge.net, mbligh@aracnet.com Subject: Re: [Lse-tech] [patch] sched-domain cleanups, sched-2.6.5-rc2-mm2-A3 References: <200403291021.i2TAKxx21370@owlet.beaverton.ibm.com> In-Reply-To: <200403291021.i2TAKxx21370@owlet.beaverton.ibm.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1242 Lines: 29 Rick Lindsley wrote: > I've got a web page up now on my home machine which shows data from > schedstats across the various flavors of 2.6.4 and 2.6.5-rc2 under > load from kernbench, SPECjbb, and SPECdet. > > http://eaglet.rain.com/rick/linux/sched-domain/index.html > I can't see it > Two things that stand out are that sched-domains tends to call > load_balance() less frequently when it is idle and more frequently when > it is busy (as compared to the "standard" scheduler.) Another is that John Hawkes noticed problems here too. mm5 has a patch to improve this for NUMA node balancing. No change on non-NUMA though if that is what you were testing - we might need to tune this a bit if it is hurting. > even though it moves fewer tasks on average, the sched-domains code shows > about half of pull_task()'s work is coming from active_load_balance() ... Yeah this is wrong and shouldn't be happening. It would have been due to a bug in the imbalance calculation which is now fixed. - 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/