Re: [Xen-devel] [PATCH] perfc: count number of explicit vcpu yields

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Mon, 2015-11-09 at 10:02 -0500, Boris Ostrovsky wrote:
> On 11/09/2015 09:53 AM, Dario Faggioli wrote:
> > On Mon, 2015-11-09 at 14:00 +0000, Ian Campbell wrote:
> > > Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> > > 
> > Reviewed-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
> > 
> > And, while we're here, I've been thinking since a while to try
> > implementing an xl interface for these counters... How bad of an
> > idea
> > is that?
> > 
> > Is something like that possible already via Boris' PMU work?
> 
> VPMU only covers CPU's hardware counters and this patch deals with 
> software events in the hypervisor.
> 
Right, I just wanted to be sure (I've planned to familiarize with that
work, but haven't got to doing it yet).

> As far as xl accessibility --- doesn't xenperf already read them out?
> 
Mmm... ISTR having tried without much luck, and having heard that it
wasn't functional any longer, but maybe I'm confusing it with something
else. I'll try again.

Thanks and Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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