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

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 2/7/08 23:41, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> Attached is the patch.  Interestingly, on my single-socket
> two-core recent-vintage Intel processor, this patch reports
> a max skew of >13 usec, much higher than the values I'm
> seeing from "xm debug-key t".  I wonder if this is due to
> a mistake in my patch (though I don't see it) or if the
> various stime error corrections are not converging as
> expected, resulting in a broader stime skew between
> processors than expected?

Perhaps this relatively large skew happens at start of day, before the
periodic calibration has 'locked on'?

 -- Keir



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