Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756156AbXFKPzo (ORCPT ); Mon, 11 Jun 2007 11:55:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753113AbXFKPzc (ORCPT ); Mon, 11 Jun 2007 11:55:32 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:57946 "EHLO e1.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752426AbXFKPz3 (ORCPT ); Mon, 11 Jun 2007 11:55:29 -0400 Date: Mon, 11 Jun 2007 08:55:27 -0700 From: "Paul E. McKenney" To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, Thomas Gleixner , Dinakar Guniguntala Subject: Re: v2.6.21.4-rt11 Message-ID: <20070611155527.GD9102@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20070609210507.GA29194@elte.hu> <20070611011954.GG27982@linux.vnet.ibm.com> <20070611073634.GB32446@elte.hu> <20070611144401.GA9102@linux.vnet.ibm.com> <20070611153855.GA21136@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070611153855.GA21136@elte.hu> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3206 Lines: 100 On Mon, Jun 11, 2007 at 05:38:55PM +0200, Ingo Molnar wrote: > > * Paul E. McKenney wrote: > > > > hm, what affinity do they start out with? Could they all be pinned > > > to CPU#0 by default? > > > > They start off with affinity masks of 0xf on a 4-CPU system. I would > > expect them to load-balance across the four CPUs, but they stay all on > > the same CPU until long after I lose patience (many minutes). > > ugh. Would be nice to figure out why this happens. I enabled rcutorture > on a dual-core CPU and all the threads are spread evenly. Here is the /proc/cpuinfo in case this helps. I am starting up a test on a dual-core CPU to see if that works better. Thanx, Paul processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 5 model name : AMD Opteron(tm) Processor 844 stepping : 8 cpu MHz : 1793.105 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall mmxext lm 3dnowext 3dnow bogomips : 3522.56 processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 5 model name : AMD Opteron(tm) Processor 844 stepping : 8 cpu MHz : 1793.105 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall mmxext lm 3dnowext 3dnow bogomips : 3579.90 processor : 2 vendor_id : AuthenticAMD cpu family : 15 model : 5 model name : AMD Opteron(tm) Processor 844 stepping : 8 cpu MHz : 1793.105 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall mmxext lm 3dnowext 3dnow bogomips : 3579.90 processor : 3 vendor_id : AuthenticAMD cpu family : 15 model : 5 model name : AMD Opteron(tm) Processor 844 stepping : 8 cpu MHz : 1793.105 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall mmxext lm 3dnowext 3dnow bogomips : 3579.90 - 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/