RE: [Qemu-devel] Inquiry, speed comparison on OS X, QEMU vs Virtual PC

[Natalia Portillo]

I think that including support for the PowerPC swapping instructions in QEMU
will break compatibility with host PowerPCs before G3, so that instructions
should be used in a run-time capability detection scheme. 

> -----Mensaje original-----
> De: address@hidden 
> [mailto:address@hidden 
> En nombre de Pierre d'Herbemont
> Enviado el: viernes, 09 de julio de 2004 20:38
> Para: address@hidden
> Asunto: Re: [Qemu-devel] Inquiry, speed comparison on OS X, 
> QEMU vs Virtual PC
> 
> I probably should add that the Mac OS X version that is 
> avalaible for download doesn't include support for the 
> PowerPC swapping instructions (little-endian storing and 
> loading instructions). Next release will.
> 
> Pierre
> 
> Le 6 juil. 04, à 02:29, address@hidden a écrit :
> 
> > It was precisely because it has not yet been optimized that I was 
> > curious of first impressions.  The fact that it has been 
> described as 
> > "somewhat" slower is encouraging.  No one expects it to be 
> faster than 
> > VPC out the gate, but to be in the same ballpark is quite an 
> > achievement.
> >
> > -Daniel
> >
> >
> > On Jul 5, 2004, at 5:23 PM, Leigh Dyer wrote:
> >
> >> On Mon, 2004-07-05 at 15:24 -0700, Daniel J.Guinan wrote:
> >>> I'm curious, how does the speed compare to Virtual PC?
> >>>
> >>
> >> Not terribly well yet - on my 1Ghz Tibook, it feels about the same 
> >> speed as on my 800Mhz PIII desktop PC at work, which is to 
> say that 
> >> the emulated system seems somewhere around 
> >> high-end-468/low-end-Pentium speed. However, it's important to 
> >> remember that Virtual PC:
> >>
> >> * has been around for ages, and has seen lots of development and 
> >> optimisation
> >> * uses a hand-written and heavily optimised x86->PPC translator
> >> * uses special PPC features like Altivec and little-endian mode to 
> >> speed things up
> >> * uses the host system's MMU to accelerate memory access
> >>
> >> Qemu's still fast enough to be usable for a great many 
> things though, 
> >> so if you're debating whether or not to try it, by all 
> means download 
> >> it and give it a go.
> >>
> >> Thanks
> >> Leigh
> >>
> >>
> >>
> >> _______________________________________________
> >> Qemu-devel mailing list
> >> address@hidden
> >> http://lists.nongnu.org/mailman/listinfo/qemu-devel
> >>
> >
> >
> >
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> >
> 
> 
> 
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