4 cores Guest Cpu saturation while host cpu load around 37%

[Gianks]

While the guest operating system reports 4 * 100% CPU usage in task manager, top over my linux host reports VirtualBox using just 150% of my total processor. looking at single cores no one reaches 100%.

I've read about poor multiprocessor guests performances in the manual but i don't understand if this behavior may be included or has to be considered "normal".

My Host:

OP: Dell e6410 - Debian Testing x32 with kernel 2.6.38-2-686-bigmem
CPU: Intel i5 M520, 2.4GHz
MEMORY: 8GB

Guest:

OP: Windows 7 x32
ASSIGNED CPU: 4
ASSIGNED MEMORY: 3072 MB
HDD: dynamic, 80Gb (now used 11,8GB)

[Gianks]

Assigning just 2 CPU to the guest, top shows VirtualBox Cpu usage around 180%. The overall guest performaces seems to be better with 2 cpu instead of 4.

[Frank Mehnert]

Still relevant with VBox 4.1.6? If so, please attach a VBox.log file of a 4.1.6 VM session.

[Frank Mehnert]

No response, closing.