[Debian-eeepc-devel] N280 - Two cores? Kernel lying?

[Juan J. Natera]

It's because of the hyper-threading (
http://en.wikipedia.org/wiki/Hyper-threading )

On Fri, Jan 7, 2011 at 10:48 AM, Hans-J. Ullrich <hans.ullrich at loop.de> wrote:
> Hi all,
> as Intel says, in my EEEPC 1005HGO the CPU N280 is a singlecore processor. But
> the kernel is telling me it has two cores (in linux as in windows as well).
>
> As I do not trust windows, but is the kernel lying?
>
> Look here:
>
> root at protheus7:/home/ullhan63# cat /proc/cpuinfo
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 28
> model name      : Intel(R) Atom(TM) CPU N280   @ 1.66GHz
> stepping        : 2
> cpu MHz         : 1000.000
> cache size      : 512 KB
> physical id     : 0
> siblings        : 2
> core id         : 0
> cpu cores       : 1
> apicid          : 0
> initial apicid  : 0
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc
> arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr
> pdcm movbe lahf_lm
> bogomips        : 3333.74
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 32 bits physical, 32 bits virtual
> power management:
>
> processor       : 1
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 28
> model name      : Intel(R) Atom(TM) CPU N280   @ 1.66GHz
> stepping        : 2
> cpu MHz         : 1000.000
> cache size      : 512 KB
> physical id     : 0
> siblings        : 2
> core id         : 0
> cpu cores       : 1
> apicid          : 1
> initial apicid  : 1
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc
> arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr
> pdcm movbe lahf_lm
> bogomips        : 3332.93
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 32 bits physical, 32 bits virtual
> power management:
>
>
> Who is lying now? Any suggestions?
>
>
> Best regards
>
> Hans-J. Ullrich
>
>
>
>
>
>
>
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