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 14:03:05 -0400 [thread overview]
Message-ID: <53750159.2000404@gmail.com> (raw)
In-Reply-To: <5CC583AB71FC0C44A5CAB54823E83A84064D5948@SINPEX01CL01.citrite.net>
Yes, thank you, Venkateswara, it is vhost=on is present.
This is something specific to driver in windows since, in linux it
performs very well.
On 5/15/2014 1:41 PM, Venkateswara Rao Nandigam wrote:
> One more important thing is to make sure you launch vhost thread for your virtio nic, as part of Guest instantiation. There will be a parameter "vhost=on" in Guest instantiation command line.
>
> -----Original Message-----
> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] On Behalf Of Venkateswara Rao Nandigam
> Sent: Thursday, May 15, 2014 10:20 AM
> To: JR; kvm@vger.kernel.org
> Subject: RE: Poor performance with virtio network driver on windows 2008 R2 on KVM
>
> 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>
> --
> 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
> --
> 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
>
--
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 18:03 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 [this message]
2014-05-15 18:07 ` Venkateswara Rao Nandigam
2014-05-15 17:59 ` JR
2014-05-15 17:27 ` Peter Kieser
2014-05-15 18:01 ` JR
2014-06-30 3:00 ` Peter Kieser
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=53750159.2000404@gmail.com \
--to=botemout@gmail.com \
--cc=kvm@vger.kernel.org \
--cc=venkateswararao.nandigam@citrix.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.