Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263188AbUCYQyS (ORCPT ); Thu, 25 Mar 2004 11:54:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263376AbUCYQyR (ORCPT ); Thu, 25 Mar 2004 11:54:17 -0500 Received: from e6.ny.us.ibm.com ([32.97.182.106]:44928 "EHLO e6.ny.us.ibm.com") by vger.kernel.org with ESMTP id S263188AbUCYQyO (ORCPT ); Thu, 25 Mar 2004 11:54:14 -0500 Date: Thu, 25 Mar 2004 08:53:23 -0800 From: "Martin J. Bligh" To: "Nakajima, Jun" , Andi Kleen , Ingo Molnar cc: piggin@cyberone.com.au, linux-kernel@vger.kernel.org, akpm@osdl.org, kernel@kolivas.org, rusty@rustcorp.com.au, ricklind@us.ibm.com, anton@samba.org, lse-tech@lists.sourceforge.net Subject: RE: [Lse-tech] [patch] sched-domain cleanups, sched-2.6.5-rc2-mm2-A3 Message-ID: <78440000.1080233603@flay> In-Reply-To: <7F740D512C7C1046AB53446D3720017301119907@scsmsx402.sc.intel.com> References: <7F740D512C7C1046AB53446D3720017301119907@scsmsx402.sc.intel.com> X-Mailer: Mulberry/2.1.2 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1451 Lines: 45 > We have found some performance regressions (e.g. SPECjbb) with the > scheduler on a large IA-64 NUMA machine, and we are debugging it. On SMP > machines, we haven't seen performance regressions. Is this the SPECjbb / Java thing that believes that sched_yield is a stable locking primitive? If so, it needs to be ignored ;-) That's the problem we had here, at least ... M. > Jun > >> -----Original Message----- >> From: Andi Kleen [mailto:ak@suse.de] >> Sent: Wednesday, March 24, 2004 8:56 PM >> To: Ingo Molnar >> Cc: piggin@cyberone.com.au; linux-kernel@vger.kernel.org; > akpm@osdl.org; >> kernel@kolivas.org; rusty@rustcorp.com.au; Nakajima, Jun; >> ricklind@us.ibm.com; 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 >> >> On Thu, 25 Mar 2004 09:28:09 +0100 >> Ingo Molnar wrote: >> >>> i've reviewed the sched-domains balancing patches for upstream > inclusion >>> and they look mostly fine. >> >> The main problem it has is that it performs quite badly on Opteron NUMA >> e.g. in the OpenMP STREAM test (much worse than the normal scheduler) >> >> -Andi > > - 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/