RE: [Xen-devel] RE: [PATCH] record max stime skew (was RE: [PATCH] strictly increasing hvm guest time)

["Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx>]

> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx]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


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