linux-kernel - Re: [RFC PATCH 00/17] virtual-bus

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Message-ID: <20090402170610.GA3001@gondor.apana.org.au>
Date:	Fri, 3 Apr 2009 01:06:10 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Avi Kivity <avi@...hat.com>
Cc:	Gregory Haskins <ghaskins@...ell.com>,
	Rusty Russell <rusty@...tcorp.com.au>, anthony@...emonkey.ws,
	andi@...stfloor.org, linux-kernel@...r.kernel.org, agraf@...e.de,
	pmullaney@...ell.com, pmorreale@...ell.com, netdev@...r.kernel.org,
	kvm@...r.kernel.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: [RFC PATCH 00/17] virtual-bus

On Thu, Apr 02, 2009 at 07:54:21PM +0300, Avi Kivity wrote:
>
> 3ms latency for ping?
>
> (ping will always be scheduled immediately when the reply arrives if I  
> understand cfs, so guest load won't delay it)

That only happens if the guest immediately does some CPU-intensive
computation 3ms and assuming its timeslice lasts that long.

In any case, the same thing will happen right now if the host or
some other guest on the same CPU hogs the CPU for 3ms.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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