[OmniOS-discuss] Potential KVM Virtio Performance Issues

[Dominik Hassler]

Dan,

>> After further testing I achieved 952 MBytes on a VM-2-VM
>> connection...1
>> linux Ubuntu 12.04 vm to another CentOS 6.6 VM running on two
>> different SmartOS host machines (through an extreme networks switch).

if I got John correctly, he was running his second test on SmartOS hosts...

We did a lot of testing on OmniOS with -net vnic and -device
virtio-net-pci but sadly to no avail...

I think we have to hope that SmartOS kvm improvements will get
upstreamed sooner or later.

On 03/24/2015 11:47 PM, Dan McDonald wrote:
> 
>> On Mar 24, 2015, at 5:34 PM, John Barfield <john.barfield at bissinc.com> wrote:
>>
>>
>> They use this format:
>>
>> -device \
>> virtio-net-pci,mac=02:08:20:5f:85:0d,tx=timer,x-txtimer=200000,x-txburst=12
>> 8,vlan=0 \
>> \
>> -net \
>> vnic,name=${VNIC1},vlan=0,ifname=${VNIC1} \
> 
>> I’m not sure if the txtimer values did anything performance gaining or 
>> not…I’m pretty sure just switching to the -device configuration instead of 
>> the legacy -net nic configuration is what did the trick. 
>>
>> If anyone wants me to I’ll test and see if that was the only difference. 
> 
> I would be interested, especially so if we have to update our KVM page to mention this.
> 
> Thanks!
> Dan
> 
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