linux-kernel - Re: [PATCH 0/15] KVM: optimize for MMIO handled

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Message-Id: <20110608173301.fad91fa9.yoshikawa.takuya@oss.ntt.co.jp>
Date:	Wed, 8 Jun 2011 17:33:01 +0900
From:	Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Cc:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH 0/15] KVM: optimize for MMIO handled

On Wed, 08 Jun 2011 14:22:36 +0800
Xiao Guangrong <xiaoguangrong@...fujitsu.com> wrote:

> On 06/08/2011 11:47 AM, Takuya Yoshikawa wrote:
> 
> >>> Sure, KVM guest is the client, and it uses e1000 NIC, and uses NAT
> >>> network connect to the netperf server, the bandwidth of our network
> >>> is 100M.
> >>>
> > 
> > I see the reason, thank you!
> > 
> > I used virtio-net and you used e1000.
> > You are using e1000 to see the MMIO performance change, right?
> > 
> 
> Hi Takuya,
> 
> Now, i have done the performance test for virtio-net, the performance is
> improved very little, and it is not *regression* ;-)
> 
> The reason is, MMIO generated by virtio-net is very very little.
> 

Yes, so I thought you had chosen e1000 for this test :)

Thanks,
  Takuya

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