FreeBSD 5.3 et multiprocessor

[ISP Informatique]

Hello, I recently have just passed a server of FreeBSD 4.2 to FreeBSD 
5.3. The nasty surprise being which I note a notable reduction in the 
performances. The machine is a HP LT6000r, quadri Xeon 700 with 2Go of RAM.
The results are appreciably the same ones with a kernel including or not 
"options SMP".
Did I miss some thing?  or perhaps did this already arrive at others? In 
particular, I has just crossed this in
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html 


>
> options          SCHED_4BSD         # 4BSD scheduler
>  
>
> The traditional scheduler for FreeBSD. Depending on your system's 
> workload, you may gain performance by using the new ULE scheduler for 
> FreeBSD that has been designed specially for SMP, but works just fine 
> on UP systems too. If you wish to try it out, replace SCHED_4BSD with 
> SCHED_ULE in your configuration file.


Did you already test?
By advance, thank you,

-- 
Hubert Adgié

ISP Informatique
www.ispinfo.fr
0890 710 147