[PVE-User] Network performance on 1.6

[Martin Maurer]

Hi Pete,

Yes, we will do these test and will integrate as soon as possible (if it makes sense).

Br, martin

> -----Original Message-----
> From: pve-user-bounces at pve.proxmox.com [mailto:pve-user-
> bounces at pve.proxmox.com] On Behalf Of Pete Ashdown
> Sent: Mittwoch, 06. Oktober 2010 23:37
> To: pve-user at pve.proxmox.com
> Subject: [PVE-User] Network performance on 1.6
> 
> I posted this on the forums, but wanted to make sure the developers saw
> this.
> 
> I thought you might be interested in this email from the KVM mailing list. I
> have verified the results on a Ubuntu guest on ProxMox 1.6 with ethtool and
> offloading is not being used, and as a result my ethernet performance is
> about 35% slower than native.
> 
> 
>   Not sure what userspace you are using, but you are probably not getting
>   any of the useful offload features set. Checking "ethtool -k $ETH"
>   in the guest will verify that.
> 
>   Try changing this:
> 
>    -net nic,macaddr=52:54:00:35:11:f1,vlan=0,model=virtio, name=virtio.0 \
>    -net tap,fd=51,vlan=0,name=tap.0
> 
>   to use newer syntax:
> 
>    -netdev type=tap,id=netdev0
>    -device virtio-net-pci,mac=52:54:00:35:11:f1,netdev=netdev0
> 
>   With just a 1Gb link, you should see line rate from guest via virtio.
> 
>   thanks,
>   -chris
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