Re: [Qemu-devel] [PATCH 2/3] virtio network device

[Anthony Liguori <anthony@codemonkey.ws>]

Anthony Liguori wrote:
>
>
> Subject: [PATCH 2/3] virtio network device
> Cc: Rusty Russell <rusty@rustcorp.com.au>
> Cc: Avi Kivity <avi@qumranet.com>
> Cc: Dor Laor <dor.laor@qumranet.com>
>
> This patch implements the backend support for the virtio network device.  The
> device is optimized for virtualized environments by limiting the number of
> guest=>host transitions per-packet.  In the best case, the number of
> transitions per-packet is < 1.
>
> With some further optimizations, I have been able to obtain 1.5gbit/sec
> host=>guest with this driver (compared to the 90mbit/sec from the rtl8139
> card).  This requires additional patches not present in this series.

Let me qualify that these numbers are with KVM.  I haven't done 
performance testing using CPU emulation.

Regards,

Anthony Liguori