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[Xen-ia64-devel] [PATCH 0/6] xenoprof: various fixes for correct samplin
| To: | xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | [Xen-ia64-devel] [PATCH 0/6] xenoprof: various fixes for correct sampling |
| From: | Isaku Yamahata <yamahata@xxxxxxxxxxxxx> |
| Date: | Tue, 11 Dec 2007 18:02:40 +0900 |
| Cc: | Isaku Yamahata <yamahata@xxxxxxxxxxxxx> |
| Delivery-date: | Tue, 11 Dec 2007 01:03:08 -0800 |
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This patch set addresses the xenorpfo/ia64 issues reported by Xing.
Xing.
Could you please try this patch set and report the result?
The fundamental change is
- make psr virtualization code not touch mPSR.pp.
The Xenoprof basic idea is that xenoprof owns PMU so that this is required.
Anyway the currently code doesn't seem to handle mPSR.pp consistently
so that some kind of clean up is needed.
This clean up might upset a guset that think it's owning PMU.
But at this moment PMU isn't virtualized so that this doesn't an issue.
Limitations:
Currently perfmon knows only kernel mode (cpl=0) and user mode(cpl=3).
On the other hand Xen/IA64 uses other cpls.
At this moment only generic pmc/pmd's are supported.
thanks
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