[Xen-users] windows 2003 hvm performance on xen 3.0.3 and xen 3.0.4

[Digilab <info@xxxxxxxxxxxxx>]

Hi,
i'm testing windows 2003 on xen/hvm and today i installed xen 3.0.4.
I used the old image disk of win2003 and it started without problem, i 
see then that even if xen 3.0.4 support apci/pae/acpi/smp cpu on 
windows, my old installation was for 1 standard pc with no smp/apic support.
So i installed from scratch win 2003 on xen 3.0.4 and at the end i  got 
2 cpu just putting vcpu=2.
I started to notice (with xentop) that the windows 2003 with smp 
enabled, consume much more cpu then the single cpu win 2003 and i notice 
also that win2003 installed from scratch on xen 3.0.4 for smp support 
had bad persormance.
While win2003 uniprocessor standard pc version is very fast, the newer 
smp/2cpu had bad performance.
why? i thinked/hoped to had improve performance from a windows2003 
smp/2cpu but isn't so...
Some suggest?

Regards,
@lessandro Marzini
DIGILAB

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