From: "Dan Magenheimer" <dan.magenheimer@oracle.com>
To: "dan.magenheimer@oracle.com" <dan.magenheimer@oracle.com>,
Keir Fraser <keir.fraser@eu.citrix.com>,
"Xen-Devel (E-mail)" <xen-devel@lists.xensource.com>
Cc: Dave Winchell <dwinchell@virtualiron.com>
Subject: RE: RE: [PATCH] record max stime skew (was RE: [PATCH] strictly increasing hvm guest time)
Date: Thu, 3 Jul 2008 10:35:48 -0600 [thread overview]
Message-ID: <20080703103548140.00000003744@djm-pc> (raw)
In-Reply-To: <20080703102413734.00000003744@djm-pc>
> From: xen-devel-bounces@lists.xensource.com
> [mailto:xen-devel-bounces@lists.xensource.com]On Behalf Of Dan
> Magenheimer
> Subject: [Xen-devel] RE: [PATCH] record max stime skew (was
>
> > Perhaps this relatively large skew happens at start of day,
> before the
> > periodic calibration has 'locked on'?
>
> Indeed you are correct. This updated patch now reports zero skew
> as expected.
>
> IMHO, it would be nice to put this patch into the tree as it
> will be good for helping to diagnose time skew problems
> such as the one just reported on the list.
Oops! Just after I sent the above email, I checked again and
the same machine (no reboots, no guests ever launched) now reports
a max stime skew of 4333ns!! Methinks there might be some
periodic glitch in the calibration code?
Dan
next prev parent reply other threads:[~2008-07-03 16:35 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-02 16:03 [PATCH] strictly increasing hvm guest time Dan Magenheimer
2008-07-02 16:07 ` Keir Fraser
2008-07-02 21:50 ` Dan Magenheimer
2008-07-02 22:41 ` [PATCH] record max stime skew (was RE: [PATCH] strictly increasing hvm guest time) Dan Magenheimer
2008-07-03 8:03 ` Keir Fraser
2008-07-03 16:24 ` Dan Magenheimer
2008-07-03 16:35 ` Dan Magenheimer [this message]
2008-07-03 20:03 ` Dan Magenheimer
2008-07-03 23:00 ` Keir Fraser
2008-07-04 15:11 ` Dan Magenheimer
2008-07-04 15:22 ` Keir Fraser
2008-07-04 19:32 ` Dan Magenheimer
2008-07-04 19:56 ` Keir Fraser
2008-07-10 0:24 ` Dan Magenheimer
2008-07-10 7:40 ` Keir Fraser
2008-07-10 22:42 ` Xen system skew MUCH worse than tsc skew (was RE: RE: [PATCH] record max stime skew (was RE: [PATCH] strictly increasing hvm guest time)) Dan Magenheimer
2008-07-11 8:27 ` Keir Fraser
2008-07-11 20:53 ` Dan Magenheimer
2008-07-11 21:27 ` Xen system skew MUCH worse than tsc skew (was RE: RE: [PATCH] record max stime skew (was RE: [PATCH] strictly increasinghvm " Ian Pratt
2008-07-12 21:05 ` Dan Magenheimer
2008-07-11 21:27 ` Xen system skew MUCH worse than tsc skew (was RE: RE: [PATCH] record max stime skew (was RE: [PATCH] strictly increasing hvm " Keir Fraser
2008-07-12 21:07 ` Dan Magenheimer
2008-07-19 17:51 ` Dan Magenheimer
2008-07-21 8:32 ` Keir Fraser
2008-07-22 22:27 ` Dan Magenheimer
2008-07-22 23:07 ` Xen system skew MUCH worse than tsc skew (was RE: RE: [PATCH] record max stime skew (was RE: [PATCH] strictly increasinghvm " Ian Pratt
2008-07-23 0:40 ` Dan Magenheimer
2008-07-23 1:16 ` Ian Pratt
2008-07-23 6:11 ` Tian, Kevin
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