Re: [ANNOUNCE] kvm-guest-drivers-windows-2

Dor Laor
2008-05-15T06:57:29Z

On Wed, 2008-05-14 at 23:09 +0200, Tomasz Chmielewski wrote:
> Anthony Liguori schrieb:
>
> (...)
>
> >>> So, a PV network driver can do about 700Mb/s, and an emulated NIC can
> >>> do about 600 Mb/s, Windows guest to host?
> >>>
> >>> That would be about 20% improvement?
> >>>
> >
> > FWIW, virtio-net is much better with my patches applied. The difference
> > between the e1000 and virtio-net is that e1000 consumes almost twice as
> > much CPU as virtio-net so in my testing, the performance improvement
> > with virtio-net is about 2x. We were loosing about 20-30% throughput
> > because of the delays in handling incoming packets.
>
> Do you by chance have any recent numbers on disk performance (i.e., Windows
> guest vs Linux host)?
>
>

At the moment there is no pv block driver for Windows guests. (there is
for linux)
You can use scsi for windows, it should perform well.