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Date: Mon, 15 Mar 2010 14:03:11 +0100
From: Joerg Roedel <joro@8bytes.org>
Subject: Re: [Qemu-devel] Ideas wiki for GSoC 2010
Message-ID: <20100315130310.GE13108@8bytes.org>
References: <20100310183023.6632aece@redhat.com> <4B9E2745.7060903@redhat.com>
	<20100315125313.GK9457@il.ibm.com>
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To: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: agraf@suse.de, aliguori@us.ibm.com, kvm@vger.kernel.org, jan.kiszka@siemens.com, qemu-devel@nongnu.org, Luiz Capitulino <lcapitulino@redhat.com>, Avi Kivity <avi@redhat.com>, agl@us.ibm.com, Nadav Amit <nadav.amit@gmail.com>, Ben-Ami Yassour1 <benami@il.ibm.com>

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