Re: [Qemu-devel] RFC: This project needs a stable branch

[Johannes Schindelin]

Hi,

On Thu, 22 Mar 2007, Julian Seward wrote:

> On Thursday 22 March 2007 23:27, Paul Brook wrote:
> > > Do you mean you're asking me to break up Paul Brook's QOPS tree at
> > > https://nowt.dyndns.org and submit it to mainline?  I can do this thing,
> > > if you really think it would help.
> >
> > If you implement all the missing bits in the process it'll help ;-)
> 
> What bits would they be then?

AFAICT almost _all_ ops for the i86 target are missing.

> FWIW, I snarfed the patch last Sunday and tested it on amd64 host / x86 
> guest, and successfully booted a couple of linux distros.  So it's not 
> obviously broken, at least for my mundane host/guest choice. It also 
> seemed marginally slower on a big compile in the guest - 395.4 host cpu 
> seconds for mainline vs 422.9 with qops.

I saw something similar (qops performing worse than non-qops), which I 
could only explain by the non-optimizing nature of not relying on GCC's 
optimizer.

Ciao,
Dscho