[Qemu-devel] Qemu speed degradation?

[Karel Gardas]

Hello,

I have just run nbench on my host machine (debian
3.0/gcc3.4.0/binutils2.14) and on my qemu guest (solaris9/sun studio9) and
found that:

host:

==============================LINUX DATA BELOW===============================
CPU                 : GenuineIntel Pentium III (Coppermine) 996MHz
L2 Cache            : 256 KB
OS                  : Linux 2.6.4
C compiler          : gcc version 3.4.0
libc                : ld-2.2.5.so
MEMORY INDEX        : 4.548
INTEGER INDEX       : 4.583
FLOATING-POINT INDEX: 7.538
Baseline (LINUX)    : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38


guest:

==============================LINUX DATA BELOW===============================
CPU                 :
L2 Cache            :
OS                  : SunOS 5.9
C compiler          : cc
libc                :
MEMORY INDEX        : 0.327
INTEGER INDEX       : 0.341
FLOATING-POINT INDEX: 0.464
Baseline (LINUX)    : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38


so the ratio between host and guest is:

memory index        : 13.90
integer index       : 13.43
floating-point index: 16.24


This is not that bad in comparison with for example bochs, but on the
other hand these results are twice slower than results on
http://fabrice.bellard.free.fr/qemu/benchmarks.html

What do you think about it?

Thanks,

Karel
--
Karel Gardas                  address@hidden
ObjectSecurity Ltd.           http://www.objectsecurity.com