[pve-devel] win8r2 virtio net problems

[Cesar Peschiera]

Hi Dietmar

And for better understand of TCP offloads over 1 and 10 Gb/s, please see 
this link:
http://en.wikipedia.org/wiki/TCP_offload_engine

----- Original Message ----- 
From: "Cesar Peschiera" <brain at click.com.py>
To: "Dietmar Maurer" <dietmar at proxmox.com>
Cc: <pve-devel at pve.proxmox.com>
Sent: Saturday, March 29, 2014 1:13 PM
Subject: Re: [pve-devel] win8r2 virtio net problems


> Hi Dietmar
> Please see this link:
> http://lists.gnu.org/archive/html/qemu-devel/2013-04/msg04382.html
>
> ----- Original Message ----- 
> From: "Alexandre DERUMIER" <aderumier at odiso.com>
> To: "Dietmar Maurer" <dietmar at proxmox.com>
> Cc: <pve-devel at pve.proxmox.com>
> Sent: Saturday, March 29, 2014 8:22 AM
> Subject: Re: [pve-devel] win8r2 virtio net problems
>
>
>> Hi, I never reach myself more than 900Mbits with windows guest. (2003 > 
>> 2012, any virito driver
>>
>> But 30mbit/s seem very slow.
>>
>> Maybe trying to play with disabling offloading options (in windows guest 
>> driver options) ?  gro,gso,...
>>
>>
>> ----- Mail original ----- 
>>
>> De: "Dietmar Maurer" <dietmar at proxmox.com>
>> À: pve-devel at pve.proxmox.com
>> Envoyé: Vendredi 28 Mars 2014 15:07:23
>> Objet: [pve-devel] win8r2 virtio net problems
>>
>>
>>
>> Hi all,
>>
>> we just observed bad performance values with virtio network on win8r2 
>> guests.
>>
>> A simple iperf from a VM to the host shown about 700Mbit/s.
>>
>> Even worse, iperf between 2 win8r2 guests on the same bridge shown below 
>> 30Mbit/s.
>>
>> Using linux VMs, I am able to get > 9Gbit/s.
>>
>> I already made all optimizations suggested at:
>>
>> http://pve.proxmox.com/wiki/Paravirtualized_Network_Drivers_for_Windows
>>
>> Any ideas?
>>
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>
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