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

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Message-ID: <4B9F671D.5060001@redhat.com>
Date:	Tue, 16 Mar 2010 13:10:21 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Sheng Yang <sheng@...ux.intel.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	Marcelo Tosatti <mtosatti@...hat.com>,
	oerg Roedel <joro@...tes.org>,
	Jes Sorensen <Jes.Sorensen@...hat.com>,
	Gleb Natapov <gleb@...hat.com>,
	Zachary Amsden <zamsden@...hat.com>, ziteng.huang@...el.com
Subject: Re: [PATCH] Enhance perf to collect KVM guest os statistics from
 host side

On 03/16/2010 12:50 PM, Ingo Molnar wrote:
>
>> I'm confused - initrd seems to be guest-side.  I was talking about the host
>> side.
>>      
> host side doesnt need much support - just some client capability in perf
> itself. I suspect vmchannels are sufficiently flexible and configuration-free
> for such purposes? (i.e. like a filesystem in essence)
>    

I haven't followed vmchannel closely, but I think it is.  vmchannel is 
terminated in qemu on the host side, not in the host kernel.  So perf 
would need to connect to qemu.

-- 
error compiling committee.c: too many arguments to function

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