From owner-freebsd-stable@FreeBSD.ORG  Tue Sep 20 09:55:43 2005
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Subject: Re: smp on dell poweredge freeze: 5.4 p7
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Claus Guttesen wrote:

>>>What PowerEdge-model is it, dual or quad? If dual, did you try to
>>>disable HTT in BIOS?
>>>      
>>>
>>poweredge 1850 bi cpu xeon 2.8
>>what's the HTT????
>>    
>>
>
>It's hyper-threading, the cpu have some extra registers, so the cpu
>can get some more work done (in theory) during one cpu-cycle. But most
>of the time the improved performance is neglible. If HTT is enabled
>one cpu will show up as two logical cpu's.
>
>So try to disable HTT in BIOS.
>
>regards
>Claus
>_______________________________________________
>freebsd-stable@freebsd.org mailing list
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>  
>
thanks a lot for answers,

in fact here's more informations

ACPI APIC Table: <DELL   PE1750  >
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  6
 cpu3 (AP): APIC ID:  7
ioapic0: Changing APIC ID to 8
ioapic1: Changing APIC ID to 9
ioapic2: Changing APIC ID to 10


which mean HTT is enabled in bios... I'll take a look for that. I've to 
take out all my vpn connections !