SMP hyperthreading and bi-processors

["sebastien.prouff" <sebastien.prouff@laposte.net>]

Good morning/afternoon,

I have a problem on a bi-Xeon Server.
I just installed (two days ago) the debian sarge for AMD64.
The server is a bi-Xeon with hyperthreading.
So, I have to see 4 processors in /proc/cpuinfo (that what I
understood on various forums...) and I only see 2 processors.

THis is the result of /proc/cpuinfo.

Djak:/usr/src/kernel-headers-2.6.8-11-em64t-p4-smp# cat
/proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      :                   Intel(R) Xeon(TM) CPU 3.20GHz
stepping        : 3
cpu MHz         : 3200.253
cache size      : 0 KB
physical id     : 0
siblings        : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 3
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep
mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2
ss ht tm syscall nx lm pni monitor ds_cpl cid cmpxchg16b
bogomips        : 6324.22
clflush size    : 64
cache_alignment : 128
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      :                   Intel(R) Xeon(TM) CPU 3.20GHz
stepping        : 3
cpu MHz         : 3200.253
cache size      : 0 KB
physical id     : 3
siblings        : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep
mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2
ss ht tm syscall nx lm pni monitor ds_cpl cid cmpxchg16b
bogomips        : 6389.76
clflush size    : 64
cache_alignment : 128
address sizes   : 36 bits physical, 48 bits virtual
power management:

So, instead of 4 results, I have just two results.
- As you can see, there is the flags ht activated
- the physical_id number is different so it is two different
physical processor.

This is my kernel :
Linux Djak 2.6.8-11-em64t-p4-smp #1 SMP Mon Oct 3 00:07:51
CEST 2005 x86_64 GNU/Linux

As I download the header for this kernel, I try to see with a
make menuconfig is something go wrong.
Well, I did not see any problem, the processor type is EM64T
with SMP activated up to 8 processors.

So please help, because I'm stick
I am waiting for your ideas.

Regards

Sébastien
Network Enginneer






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