Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751537AbVJ0AlM (ORCPT ); Wed, 26 Oct 2005 20:41:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751542AbVJ0AlL (ORCPT ); Wed, 26 Oct 2005 20:41:11 -0400 Received: from unused.mind.net ([69.9.134.98]:3557 "EHLO echo.lysdexia.org") by vger.kernel.org with ESMTP id S1751529AbVJ0AlK (ORCPT ); Wed, 26 Oct 2005 20:41:10 -0400 Date: Wed, 26 Oct 2005 17:34:06 -0700 (PDT) From: William Weston To: john stultz cc: Rui Nuno Capela , george@mvista.com, Ingo Molnar , Fernando Lopez-Lezcano , Mark Knecht , Steven Rostedt , david singleton , Thomas Gleixner , linux-kernel@vger.kernel.org, cc@ccrma.Stanford.EDU Subject: Re: 2.6.14-rc4-rt7 In-Reply-To: <1130369591.27168.358.camel@cog.beaverton.ibm.com> Message-ID: References: <1129852531.5227.4.camel@cmn3.stanford.edu> <20051021080504.GA5088@elte.hu> <1129937138.5001.4.camel@cmn3.stanford.edu> <20051022035851.GC12751@elte.hu> <1130182121.4983.7.camel@cmn3.stanford.edu> <1130182717.4637.2.camel@cmn3.stanford.edu> <1130183199.27168.296.camel@cog.beaverton.ibm.com> <20051025154440.GA12149@elte.hu> <1130264218.27168.320.camel@cog.beaverton.ibm.com> <435E91AA.7080900@mvista.com> <20051026082800.GB28660@elte.hu> <435FA8BD.4050105@mvista.com> <435FBA34.5040000@mvista.com> <435FEAE7.8090104@rncbc.org> <1130369591.27168.358.camel@cog.beaverton.ibm.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 741 Lines: 21 On Wed, 26 Oct 2005, john stultz wrote: > I'm grabbing rt7 to try to reproduce this. Not yet sure what the cause > could be. From Rui's dmesg the tsc clocksource was being used, I assume > this is the case with you as well, William? I found a relatively quick way to trigger the 'time warp' and 'BUG in get_monotonic_clock_ts' warnings. while [ 1 ]; do /bin/date > /dev/null; done I got 1 to 3 warnings a minute (for the first 5 minutes) with a debug -rt7 on the xeon/smt box. ymmv. --ww - 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/