Re: [Qemu-devel] Ideas wiki for GSoC 2010

Joerg Roedel
2010-03-15T13:03:14Z

On Mon, Mar 15, 2010 at 05:53:13AM -0700, Muli Ben-Yehuda wrote:
> On Mon, Mar 15, 2010 at 02:25:41PM +0200, Avi Kivity wrote:
> > On 03/10/2010 11:30 PM, Luiz Capitulino wrote:
>
> > > Hi there,
> > >
> > > Our wiki page for the Summer of Code 2010 is doing quite well:
> > >
> > >http://wiki.qemu.org/Google_Summer_of_Code_2010
> >
> > I will add another project - iommu emulation. Could be very useful
> > for doing device assignment to nested guests, which could make
> > testing a lot easier.
>
> Our experiments show that nested device assignment is pretty much
> required for I/O performance in nested scenarios.

Really? I did a small test with virtio-blk in a nested guest (disk read
with dd, so not a real benchmark) and got a reasonable read-performance
of around 25MB/s from the disk in the l2-guest.

Joerg