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Re: [Xen-devel] [PATCH] Disable Xen PowerNow! support on Opteron 2nd gen
| To: | "Langsdorf, Mark" <mark.langsdorf@xxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] Disable Xen PowerNow! support on Opteron 2nd gen and earlier processors |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Mon, 04 Feb 2008 22:41:08 +0000 |
| Cc: | Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Mon, 04 Feb 2008 14:45:57 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH] Disable Xen PowerNow! support on Opteron 2nd gen and earlier processors |
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On 4/2/08 21:52, "Langsdorf, Mark" <mark.langsdorf@xxxxxxx> wrote: > Would turning off interrupts solve it? It might be a bit brute > force, but there's certainly a prechange notifier event and a > postchange notifier event to use to turn them on and off. > > Alternately, the prechange event could sleep until woken by > the timer interrupt, which would increase the chance that all > frequency changes take place at the start of an interrupt. Perhaps you could find out if the big deltas happen on a timer interrupt that happens between pre-notification and post-notification? If so you could indeed disable event delivery and that might well fix it. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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