Patrick,

> Result of the tests:
> On a request which take 2,8S on the PIV 3Ghz :
> On a PIV 2.5 Ghz
> 1 user = 3,079s
> 3 users = 5,578s 5,172s 5,953s
>
> On a PIV 3.0Gh without modifying the IB config
> 1 user = 2,813s
> 3 users = 3,313s 3,609s 5,062s
>
> On a PIV 3.0Gh with CPU_AFFINITY 3
> 1 user = 2,859s
> 3 users = 3,187s 5,359s 5,703s

You realize that CPU_AFFINITY 3 maps to: Physical CPU 1/Logical CPU 1
and Physical CPU 1/Logical CPU 2.

I would suggest that a better choice might be CPU_AFFINITY 5 --
Physical CPU 1 Logical CPU 1/Physical CPU 2 Logical CPU 1.

Finally, you realize that (even according to Intel) Hyper-Threading only
provides a 30% increase in performance.