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

[Dor L. <dor...@qu...>]

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.