[TriLUG] Ubuntu and hyperthreaded CPUs

[James Tuttle]

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
>>>>>>
>>>>>>           
>>>     
>>
>>   


-- 
--
---Jim Tuttle
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