KVM performance

[Randy Broman <rbroman@bayarea.net>]

I am using Intel Core2 Duo E6600, Kubuntu 8.04 with kernel 
2.6.24-21-generic,
kvm (as in "QEMU PC emulator version 0.9.1 (kvm-62)") and a WinXP SP3 
guest,
with bridged networking. My start command is:

sudo kvm -m 1024 -cdrom /dev/cdrom -boot c -net 
nic,macaddr=00:d0:13:b0:2d:32,
model=rtl8139 -net tap -soundhw all -localtime /home/rbroman/windows.img

All this is stable and generally works well, except that internet-based 
video and
audio performance is poor (choppy, skips) in comparison with performance 
under
WinXP running native on the same machine (it's a dual-boot). I would 
appreciate
recommendations to improve video and audio performance, and have the 
following
specific questions:

-I've tried both the default Cirrus adapter and the "-std-vga" option. 
Which is better?
I saw reference to another VMware-based adapter, but I can't figure out 
how to implement
it - would that be better?

-I notice we're up to kvm-79 vs my kvm-62. Should I move to the newer 
version? Do I
have to custom-compile my kernel to do so, and if so what kernel version 
and what
specific kernel options should I use?

-Are there other tuning steps I could take?

Please copy me directly as I'm not on this list. Thankyou