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Re: [Xen-devel] time went backwards
| To: | "Jan Beulich" <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] time went backwards |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Mon, 12 Jun 2006 11:21:10 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Mon, 12 Jun 2006 03:21:33 -0700 |
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On 12 Jun 2006, at 10:35, Jan Beulich wrote: I continue to see occasional 'time went backwards' messages on 3.0-testing on larger systems. Is anyone else seeing such? Have there been any improvements to -unstable that haven't been moved over? If so, can anyone point out therespective changesets? Thanks, Jan That would mean cross-cpu jitter of >10ms, when TSCs are resynced every 1s. That's a lot of jitter. I would guess that either we have a bug or something is changing CPU clock frequencies every once in a while (perhaps automatically?). Any idea if the messages correlate with lots of system activity or anything like that? -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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