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Re: [Xen-devel] Time went backwards
| To: | Rik van Riel <riel@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Time went backwards |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Fri, 10 Mar 2006 17:14:16 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 10 Mar 2006 17:14:47 +0000 |
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On 10 Mar 2006, at 17:00, Rik van Riel wrote: I am very frequently seeing these Time went backwards messages on my test systems. Running a 2 VCPU guest on a single CPU computer seems to be effective at triggering this ;) That's interesting, particularly if you can trigger on a single physical CPU. In that case cpu_delta should definitely *never* be negative. Maybe the steal_time logic, which does mess with per-cpu processed_system_time, is not quite right? :-) When did you start seeing the messages? -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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