From: JR <botemout@gmail.com>
To: Venkateswara Rao Nandigam <venkateswararao.nandigam@citrix.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: Poor performance with virtio network driver on windows 2008 R2 on KVM
Date: Thu, 15 May 2014 13:59:15 -0400 [thread overview]
Message-ID: <53750073.7090806@gmail.com> (raw)
In-Reply-To: <5CC583AB71FC0C44A5CAB54823E83A84064D4D2E@SINPEX01CL01.citrite.net>
We have tried TSO offload; no effect.
I'm thinking about passthough; I don't think that grizzly (openstack,
the environment in which I'm running) supports it. Not to say that
there's not a way to make it work but ...
Thanks
JR
On 5/15/2014 12:49 AM, Venkateswara Rao Nandigam wrote:
> Try TSO offload on Guest Virtio interface
>
> And try passthrough interface mode at Host Level for this Guest Virtio Interface
>
> Thanks,
> Venkatesh
>
> -----Original Message-----
> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] On Behalf Of JR
> Sent: Wednesday, May 14, 2014 9:07 PM
> To: kvm@vger.kernel.org
> Subject: Poor performance with virtio network driver on windows 2008 R2 on KVM
>
> Greetings all,
>
> Though I don't believe that this is KVM problem per se, I'm seeing very poor network performance when using windows 2008R2 KVM instances with the virtio driver when on a 10G network. iperf results show linux VMs getting close to wire speeds, while windows only does about 1.3Gb/sec.
>
> I've tried a number of tcp settings (chimney, etc...) as recommended by some google searches but nothing has helped.
>
> Does anyone have any advice?
>
> Thanks much,
> JR
>
>
> --
> Your electronic communications are being monitored; strong encryption is an answer. My public key <http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4F08C504BD634953>
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> To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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--
Your electronic communications are being monitored; strong encryption is
an answer. My public key
<http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4F08C504BD634953>
next prev parent reply other threads:[~2014-05-15 17:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-14 15:37 Poor performance with virtio network driver on windows 2008 R2 on KVM JR
2014-05-15 4:49 ` Venkateswara Rao Nandigam
2014-05-15 17:41 ` Venkateswara Rao Nandigam
2014-05-15 18:03 ` JR
2014-05-15 18:07 ` Venkateswara Rao Nandigam
2014-05-15 17:59 ` JR [this message]
2014-05-15 17:27 ` Peter Kieser
2014-05-15 18:01 ` JR
2014-06-30 3:00 ` Peter Kieser
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