[TriLUG] Ubuntu and hyperthreaded CPUs

[Dave Sorenson]

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