Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422802AbWBIGEK (ORCPT ); Thu, 9 Feb 2006 01:04:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422810AbWBIGEK (ORCPT ); Thu, 9 Feb 2006 01:04:10 -0500 Received: from mustang.oldcity.dca.net ([216.158.38.3]:2529 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S1422802AbWBIGEJ (ORCPT ); Thu, 9 Feb 2006 01:04:09 -0500 Subject: Re: preempt-rt, NUMA and strange latency traces From: Lee Revell To: =?ISO-8859-1?Q?S=E9bastien_Dugu=E9?= Cc: Steven Rostedt , "linux-kernel@vger.kernel.org" , Ingo Molnar In-Reply-To: <1139395534.21471.13.camel@frecb000686> References: <1139311689.19708.36.camel@frecb000686> <1139395534.21471.13.camel@frecb000686> Content-Type: text/plain; charset=ISO-8859-1 Date: Thu, 09 Feb 2006 01:04:05 -0500 Message-Id: <1139465045.30058.31.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.5.90 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 606 Lines: 15 On Wed, 2006-02-08 at 11:45 +0100, S?bastien Dugu? wrote: > The more I think about it, the more I tend to believe it's hardware > related. It seems as if the CPU just hangs for ~27 ms before > resuming processing. That would be an exceptionally long latency - you would probably notice it if the mouse froze, VOIP dropped out, ping stops, etc for 30ms. Lee - 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/