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

Muli Ben-Yehuda
2008-05-14T15:39:12Z

On Wed, May 14, 2008 at 06:09:42PM +0300, Dor Laor wrote:

> > Do you have any performance numbers for networking to see how it
> > compares to the real hardware?
> >
> > - Linux host (or: real Windows running on that host)
>
> For host you can measure yourself but for Linux guest (to host) it
> currently do about 1G, using TSO (work in progress) it can do 2.5G,
> and there is also work in progress to make the kernel know virtio
> through the tap interface which will further boot performance.

... with what kind of CPU utilization?

> > - PV Windows (network driver)
>
> About 700Mb+-, there is currently extra copy that we need to omit.
> Thanks for Anthony, we just have to change the driver.

Same question (although it's less interesting if we can't even
saturate the pipe).

> > - non-PV Windows
>
> What do you mean? Other fully emulated nics like e1000?
> It does not perform as pv but depending on the guest it can do up to
> 600Mb+-.

Same question (although again it's less interesting if we can't even
saturate the pipe).

Cheers,
Muli