Re: [Qemu-devel] qemu-system-ppc speed

[Brad Watson]

Hi J,

I was comparing the ppc-softmmu w/ the i86-softmmu. 
I've since noticed the following messages in dmesg on
the ppc Linux instance, and I suspect that my
impression that it was more "sluggishness" is likely
related to the following messages:

hdc: DSC timeout
hdc: DSC timeout
.
.
.
etc.

hdc was assigned to an iso file via the  -cdrom
parameter when qemu-system-ppc was started.

Regards,

Brad Watson


--- "J. Mayer" <address@hidden> wrote:
> On Sat, 2004-07-03 at 23:14, Natalia Portillo wrote:
> 
> > It is due to emulation overhead, and the PowerPC
> CPU (specially the MMU)
> > complexity.
> 
> In my opinion, PPC is far less complicated than
> x86....
> I ran nbench under qemu-system-ppc some time ago. It
> gave me the
> emulated system was 15 times slower than the host
> machine. It seems to
> be quite acceptable to me.
> 
> > > En nombre de Brad Watson
> > > Hi All,
> > > 
> > > I've been experimenting w/running linux under 
> > > qemu-system-ppc.  My impression is that is
> considerably 
> > > slower than linux running under qemu. Is it due
> to primarily 
> > > endian conversion overhead or something else ?
> 
> Did you compare with i386-softmmu ?
> 
> 
> -- 
> 
> J. Mayer <address@hidden>
> 
> Never organized
> 
> 
> 
> _______________________________________________
> Qemu-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
> 


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