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RE: [Xen-devel] [PATCH] Disable Xen PowerNow! support on Opteron 2nd gen
| To: | "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] [PATCH] Disable Xen PowerNow! support on Opteron 2nd gen and earlier processors |
| From: | "Langsdorf, Mark" <mark.langsdorf@xxxxxxx> |
| Date: | Fri, 1 Feb 2008 10:39:56 -0600 |
| Cc: | Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 01 Feb 2008 08:56:19 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH] Disable Xen PowerNow! support on Opteron 2nd gen and earlier processors |
> Changeset 16927 should fix the problem for you. I'm getting about 5 "Time went backwards" messages a day right now, which is a drastic improvement but still more than I'd like. In three instances, the shadow time value does not increase. The weird thing is the cpu time values are always of the form: 0: xxxxxx7444952 1: yyyyyy7447746 2: yyyyyy7447746 3: yyyyyy7447746 the y values are usually but not always the same as x or slightly higher. When they are different, they differ by 1000000, 2000000, or 3000000. I suspect it is related to the fact that platform calibration is only performed if smp_processor_id() == 0, but I can't figure out why this is occurring. -Mark Langsdorf Operating System Research Center AMD _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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