[Qemu-devel] kqemu benchmarks versus VMWare 5.0

[Qemu-devel] kqemu benchmarks versus VMWare 5.0

[Matthew Mastracci]

I ran QEMU+kqemu against VMWare 5.0 using the SiSoft Sandra benchmark 
and got some surprising numbers.  I don't know if the VMWare 5.0 beta's 
debugging is getting in the way of its emulation numbers, but it seems 
like QEMU is ahead of the pack here in terms of raw instruction 
throughput (higher is better):

VMWare:
Integer: 13725 it/s
Floating Point: 14580 it/s

QEMU+kqemu:
Integer: 14991 it/s
Floating Point: 15949 it/s

Note that VMWare feels much smoother - most likely due to its more 
advanced video and mouse drivers.

Congrats!
Matt.

Re: [Qemu-devel] kqemu benchmarks versus VMWare 5.0

[Thomas Glanzmann]

Hi Matthew,

benchmarking integer and floating point operation in a virtual machine
like qemu or vmware doesn't make sense because they are both executed on
the real CPU without any modification of the original code. It should be
the same speed than on the native machine.

Interesting would be numbers where many page faults and context switches
involved. Also havy IO. The test that comes in my mind is compiling a
kernel. It would be interesting if you could paste the numbers for say a
kernel compilation of 2.2.8 with default config.

time ( tar xfz /path/to/kernel.tgz; cd kernel-version; make oldconfig; make bzImage )

Maybe you should meassure the time external because the virtual machine
can loose time ticks. But that would be a good start.

Greetings,
	Thomas