From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Kinzler Subject: Re: (XEN) Platform timer appears to have unexpectedly wrapped 10 or more times. Date: Tue, 10 Apr 2012 15:59:42 +0200 Message-ID: <4F843CCE.7010307@hfp.de> References: <20120104172343.GA30630@entuzijast.net> <4F84288E.1070407@hfp.de> <20120410130512.GA3598@entuzijast.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120410130512.GA3598@entuzijast.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Josip Rodin Cc: Philippe.Simonet@swisscom.com, xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org > On Tue, Apr 10, 2012 at 02:33:18PM +0200, Andreas Kinzler wrote: >> I have the same problem. Do you use ntpd? Which version? I suspect >> some link between the problem and ntpd. > But ntpd is still a userland program, shouldn't the kernel exert the > ultimate control over who gets to screw with the system's clock source? > In any case, I did a quick grep of ntpd sources and found references to > RDTSC only in the Windows port, so the link doesn't seem obvious. Right, there is no obvious link (but which hard to reproduce bug is obvious?) but see "http://lists.xen.org/archives/html/xen-devel/2011-10/msg01269.html". There seems to be some connection. Regards Andreas