[Qemu-devel] QEMU newbie : disk access slowness

[Qemu-devel] QEMU newbie : disk access slowness

[Matthew Frederico]

So QEMU rocks as far as cpu emulation is concerned... however, I am
wondering if I am doing something wrong, or can do something different
about disk access..

My host machine is FC3t3, and my qemu version is CVS (6.1) as of 10-26-2004...

I've been able to install both WIN98 and WinXP just fine, but
accessing the hard drive is sluggish at best.  CD-ROM appears to be
close to native.

Anybody have any pointers or tips as fars speeding up my hard disk
access with QEMU?

Regards,

-- 
-- Matthew Frederico
http://www.ultrize.com

Re: [Qemu-devel] QEMU newbie : disk access slowness

[zitu]

Quoting Matthew Frederico <mfrederico@gmail.com>:
> Anybody have any pointers or tips as fars speeding up my hard disk
> access with QEMU?

On win XP host, recompiling with gcc-3.3.3 instead of gcc-3.2.3 gave
some improvements. But the top is a certain patch posted some weeks
ago. See below...

(Host is winXPpro, guest is bbc-2.1.iso cdrom)
(all my recompilations are with msys/mingw+gcc-3.3.3)

qemu-0.6.0 (binaries from qemu's website)           = ~17 MB/s
qemu-0.6.0 (recompiled with msys/mingw+gcc-3.3.3)   = ~17.5 MB/s
qemu-0.6.1 (cvs *with* suggested pci-ide DMA PATCH) = ~47 MB/s !!!! :))

Please look back at this mailing list archives to get the
"suggested pci-ide DMA PATCH".

Zitu
--