Re: [Qemu-devel] virtio-net performance on mach-virt.

[Paolo Bonzini]

Il 31/10/2013 04:32, Giridhar Maruthy ha scritto:
> On 30 October 2013 22:12, Paolo Bonzini <address@hidden> wrote:
>> Il 30/10/2013 15:40, Giridhar Maruthy ha scritto:
>>> Hi All,
>>>
>>> I tried to measure the network performance of guest (mach-virt) with
>>> virtio-net on an ARM host platform (Samsung exynos). The qemu version
>>> is 1.6.50.
>>>
>>> I found that with 1GbE NIC on the host, the host iperf gave a speed of
>>> 847Mbits/sec when a local dhcp server was used as a iperf server.
>>>
>>> But the guest gave a speed of 478Mbits/sec which is around 56% compared to 
>>> host.
>>>
>>> What is the typical guest network efficiency compared to host with 
>>> virtio-net?
>>> Any ideas would be helpful.
>>
>> Were you using vhost?
> 
> Yes, I did use vhost in the host kernel configuration and passed
> vhost=on in qemu, but there is no difference in the performance of
> guest.

What's your command line?

Paolo