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Re: [Qemu-devel] SMB for DOS ?
From: |
Herbert Poetzl |
Subject: |
Re: [Qemu-devel] SMB for DOS ? |
Date: |
Sun, 19 Dec 2004 06:27:41 +0100 |
User-agent: |
Mutt/1.4.1i |
On Sat, Dec 18, 2004 at 06:32:24PM +0000, Paul Brook wrote:
> > > I hope you will not forget us poor mac users. Optimizing x86 on ppc
> > > performance would make a number of people very happy, I'd say.
> >
> > performance on ppc can become very good because
> > there are much more registers available for emulating
> > the x86 stuff ...
>
> The really slow bit tends to be MMU emulation, and more
> host registers doesn't help here. Mapping all guest registers
> directly onto host registers probably doesn't make all that
> much difference as the values will tend to be in L1
> cache anyway.
well, thought I do some benchmarks with bintrans[1] vs
qemu (i386 userspace on PPC) to see what should be possible ...
the test cadidates[2] are cli only and do cpu-bound stuff
(fibonacci numbers, the game go, and the magic square)
version [A] [B] [C]
---------------------------------------------------------------
qemu 0.5.5 33.20 583.30 1237.48
qemu 0.6.1 18.33 476.78 872.69
bintrans 0.1 10.33 176.71 348.64
---------------------------------------------------------------
speedup 77.4% 169.8% 150.3%
[A] i386-root/bin/fib
time i386-user/qemu-i386 i386-root/bin/fib
time bintrans-0.1/bintrans i386-root/bin/fib
39088169
Command exited with non-zero status 9
[B] i386-root/bin/go
time i386-user/qemu-i386 i386-root/bin/go 50 21 5stone21.in
time bintrans-0.1/bintrans i386-root/bin/go 50 21 5stone21.in
...
370 W pass
371 B pass
Game over
exit (0)
[C] i386-root/bin/imc
time i386-user/qemu-i386 i386-root/bin/imc 10000 >/dev/null
time bintrans-0.1/bintrans i386-root/bin/imc 10000 >/dev/null
best,
Herbert
[1] http://www.complang.tuwien.ac.at/schani/bintrans/
[2] http://www.complang.tuwien.ac.at/schani/bintrans/i386-root.tar.gz
> Paul
- Re: [Qemu-devel] SMB for DOS ?, (continued)
- Re: [Qemu-devel] SMB for DOS ?, Adrian Smarzewski, 2004/12/16
- Re: [Qemu-devel] SMB for DOS ?, Fabrice Bellard, 2004/12/16
- Re: [Qemu-devel] SMB for DOS ?, Laurent Amon, 2004/12/16
- optimizations, was Re: [Qemu-devel] SMB for DOS ?, Johannes Schindelin, 2004/12/16
- Re: [Qemu-devel] SMB for DOS ?, Herbert Poetzl, 2004/12/18
- Re: [Qemu-devel] SMB for DOS ?, Paul Brook, 2004/12/18
- Re: [Qemu-devel] SMB for DOS ?, John R. Hogerhuis, 2004/12/18
- Re: [Qemu-devel] SMB for DOS ?, André Braga, 2004/12/18
- Re: [Qemu-devel] SMB for DOS ?,
Herbert Poetzl <=
- Re: [Qemu-devel] SMB for DOS ?, Adrian Smarzewski, 2004/12/16
- Re: [Qemu-devel] SMB for DOS ?, Herbert Poetzl, 2004/12/18
Re: [Qemu-devel] SMB for DOS ?, Ryan Underwood, 2004/12/16
RE: [Qemu-devel] SMB for DOS ?, Andreas Bollhalder, 2004/12/17