[TriLUG] Ubuntu and hyperthreaded CPUs

[James Tuttle]

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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--
---Jim Tuttle
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