On 08/25/2010 04:28 PM, Anthony Liguori wrote:
On 08/25/2010 06:09 PM, walt wrote:
On 08/25/2010 12:48 PM, Anthony Liguori wrote:
On 08/25/2010 02:37 PM, walt wrote:
I find that qemu-kvm boots to the Win7 login prompt in 25 seconds,
while qemu with kvm enabled takes about 45 seconds.
Also, what's your full command line?
/usr/local/bin/qemu-system-x86_64 -m 1024 -enable-kvm -cpu kvm64 w7.diff
You'll get more accurate and repeatable results by using:
qemu-system-x86_64 -m 1024 -enable-kvm -cpu kvm64 -drive file=w7.diff,cache=none
Turning off the cache slows both of them down, as I would expect:
qemu-kvm: 52 seconds
qemu: 65 seconds
Also try qemu-kvm with -no-kvm-irqchip. I can't believe an in-kernel lapic
would make this much of a difference with windows 7 but it's worth trying.
Using that flag wipes out the difference entirely: both come in at about 65
seconds.
I also tried xp-32 running on the same two kvm64 virtual machines, with slightly
different results:
qemu-kvm: 35 seconds (65 seconds using -no-kvm-irqchip, a huge disadvantage)
qemu: 58 seconds
Anything unexpected in these results?
Thanks for your time.
