[TriLUG] Ubuntu and hyperthreaded CPUs

[Christopher L Merrill]

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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