Re: [PATCH] KVM test: Add perfmon into the guest tests

[Chen Cao <kcao@redhat.com>]

On Thu, May 27, 2010 at 10:08:49AM +0200, Jes Sorensen wrote:
> On 05/25/10 05:05, Chen Cao wrote:
> > perfmon2 API provides access to the hardware performance counters of
> > modern processors.
> > 
> > Dependency,
> > To compile the source code of the test, the following packages should
> > be installed,
> >         glibc-static-2.11.1-6.x86_64
> >         glibc-headers-2.11.1-6.x86_64
> >         glibc-common-2.11.1-6.x86_64
> >         glibc-devel-2.11.1-6.x86_64
> >         glibc-2.11.1-6.x86_64
> > 
> > Note,
> > 1. libpfm uses the Performance Monitor Unit (PMU) on the processors,
> > but this unit is not provided by kvm currently, i.e. the test should
> > fail in kvm guests.
> > 2. According to the README file of perfmon-tests-0.3, 2.6.24 or higer
> > Linux kernel (with perfmon v2.8 or higher) is needed to run the tests.
> 
> I thought perfmon2 was deprecated in favor of perf_event.c ? The only
> reference left for perfmon2 in the kernel is in the ia64 tree, and
> KVM/ia64 seems to be pretty dead these days.
> 

Jes,

Thank you for reminding.
I have not noticed your mail this afternoon and resent the patches for
the perfmon test, it seems that i may have made a mistake.

by the way, could you tell me how to verify that "perfmon2 was
deprecated in favor of perf_event.c", except looking into the kernel
code?


Regards,

Cao, Chen
2010/05/27