Re: [PATCH] Enhance perf to collect KVM guest os statistics from host side

Avi Kivity
2010-03-17T08:20:27Z

On 03/17/2010 10:16 AM, Ingo Molnar wrote:
> * Avi Kivity<avi@redhat.com> wrote:
>
>
>> Monitoring guests from the host is useful for kvm developers, but less so
>> for users.
>>
> Guest space profiling is easy, and 'perf kvm' is not about that. (plain 'perf'
> will work if a proper paravirt channel is opened to the host)
>
> I think you might have misunderstood the purpose and role of the 'perf kvm'
> patch here? 'perf kvm' is aimed at KVM developers: it is them who improve KVM
> code, not guest kernel users.
>

Of course I understood it. My point was that 'perf kvm' serves a tiny
minority of users. That doesn't mean it isn't useful, just that it
doesn't satisfy all needs by itself.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.