Will, On Wed, Mar 08, 2006 at 03:40:16PM -0500, William Cohen wrote: > > > >I have released another version of the perfmon new base package. > >This release is relative to 2.6.16-rc5 > > Hello Stephane, > > Is there any thoughts on how perfmon2 is going to work with xen enabled > kernels or processors that support virtualization? > AFAIK, there is currently no Xen support for PMU on any platforms. By "support" I mean suport for guests using the PMU. As such, I do not think this works. I am planning on looking at this next because this is becoming a pressing matter and not just on IA-64. My first goal is to ensure that a guest using perfmon2 works once it is virtualized. That implies that the Xen VMM does save/restore PMU state on guest switch. That's a bare minimum. As for HW virutlization support, I think it helps a little bit but there still needs to be some additional code in the VMM to make this work correctly. This is also something I want to look at. -- -Stephane - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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