[TriLUG] Ubuntu and hyperthreaded CPUs

[Christopher L Merrill]

I think the Precision 470 is similar to the PE SC1420 in that you also need
a different fan shroud for the 2nd processor and a VRM.  You can find then
on eBay most of the time.

C


James Tuttle wrote:
> Oh, I said Optiplex before.  It's a Precision 470 and there are two
> sockets.  Hmmm... what could I use this for?  64 bit, 4 GB of RAM, 2
> Xeon processors, gigabit LAN... Quake server!
> 
> jim
> 
> Dave Sorenson wrote:
>> Should work if you have a dual processor motherboard.
>>
>> Dave
>>
>> James Tuttle wrote:
>>> I have two of these sitting on my desk.  One is off and unused.  If I
>>> pull the processor out of it and stick it into the working machine, will
>>> I be able see and use 4 CUP's?
>>>
>>> That would be awesome.  Of course, it would be a total waste of
>>> electricity, but it would be awesome.
>>>
>>> Jim
>>>
>>> James Tuttle wrote:
>>>   
>>>> Oh, yeah.
>>>>
>>>>
>>>> Yes.
>>>>
>>>>
>>>> Jim
>>>>
>>>> Christopher L Merrill wrote:
>>>>     
>>>>> So, for the record, that is "YES, Ubuntu also reports
>>>>> a single hyperthreaded CPU as 2 processors".
>>>>>
>>>>> Thanks!
>>>>> C
>>>>>
>>>>>
>>>>> James Tuttle wrote:
>>>>>       
>>>>>> I have a Dell Optiplex with a Xeon 2.8 GHz CPU running Ubuntu 6.06.
>>>>>> Here's the cpu info:
>>>>>>
>>>>>> jim at dmz:~$ cat /proc/cpuinfo
>>>>>> processor       : 0
>>>>>> vendor_id       : GenuineIntel
>>>>>> cpu family      : 15
>>>>>> model           : 4
>>>>>> model name      : Intel(R) Xeon(TM) CPU 2.80GHz
>>>>>> stepping        : 1
>>>>>> cpu MHz         : 2793.102
>>>>>> cache size      : 1024 KB
>>>>>> fdiv_bug        : no
>>>>>> hlt_bug         : no
>>>>>> f00f_bug        : no
>>>>>> coma_bug        : no
>>>>>> 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 pbe nx lm pni
>>>>>> monitor ds_c
>>>>>> pl cid cx16 xtpr
>>>>>> bogomips        : 5590.35
>>>>>>
>>>>>> processor       : 1
>>>>>> vendor_id       : GenuineIntel
>>>>>> cpu family      : 15
>>>>>> model           : 4
>>>>>> model name      : Intel(R) Xeon(TM) CPU 2.80GHz
>>>>>> stepping        : 1
>>>>>> cpu MHz         : 2793.102
>>>>>> cache size      : 1024 KB
>>>>>> fdiv_bug        : no
>>>>>> hlt_bug         : no
>>>>>> f00f_bug        : no
>>>>>> coma_bug        : no
>>>>>> 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 pbe nx lm pni monitor ds_c
>>>>>>
>>>>>>                                                     pl cid cx16 xtpr
>>>>>> bogomips        : 5586.18
>>>>>>
>>>>>>
>>>>>> Christopher L Merrill wrote:
>>>>>>         
>>>>>>> Does Ubuntu 7.04 recognize a single Xeon as 2 processors if
>>>>>>> hyperthreading is enabled?
>>>>>>>
>>>>>>> A specific example:
>>>>>>>    http://i133.photobucket.com/albums/q55/axvel/new/IMG_7386.jpg
>>>>>>>
>>>>>>> Would that be a single CPU machine?  I know RHEL/CentOS works
>>>>>>> this way...so I was curious if the others do too.  I assume so,
>>>>>>> since this is probably determined by the kernel.
>>>>>>>
>>>>>>> TIA,
>>>>>>> C
>>>>>>>
>>>>>>>           
>>>>     
>>>   
> 
> 


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