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Re: [Qemu-discuss] Getting The Performance monitoring interrupt fired

From: Bandan Das
Subject: Re: [Qemu-discuss] Getting The Performance monitoring interrupt fired
Date: Fri, 10 Feb 2017 12:31:34 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Parfait Tokponnon <address@hidden> writes:

>  Hello Bandan,
> Thank you for your reply;
> 2017-02-07 0:14 GMT+01:00 Bandan Das <address@hidden>:
>> KVM implements a subset but I think this should work. Could it be that
>> interrupts
>> are not firing exactly when you want them ?
> I don't think so because, this interrupt never fires no matter how much I
> wait for it
> In this thread
> <http://kvm.vger.kernel.narkive.com/PCuzsRwf/vt-x-and-performance-counter-interrupt-in-kvm-mode>,
> we read that Performance counter interrupt virtualization may be integrated
> in KVM, but the thread is too old now to reply and I don't know if this

Right :) I think this discussion was well before vPMU was implemented. I think 
the best approach
is to try a case where it's known to work (such as Linux) and then try to 
backstep on why it's
not working in your case.

> feature is now fully implemented in kvm.

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