Am Donnerstag, 8. November 2012 schrieb Philip Ashmore:
> On 08/11/12 19:38, Martin Steigerwald wrote:
> > Am Donnerstag, 8. November 2012 schrieb Philip Ashmore:
> >> But cat /proc/cpuinfo says:
> >> ...
> >> processor : 0
> >> vendor_id : GenuineIntel
> >> cpu family : 6
> >> model : 42
> >> model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz
> >> stepping : 7
> >> microcode : 0x28
> >> cpu MHz : 2201.000
> >> cache size : 6144 KB
> >> physical id : 0
> >> siblings : 8
> >> core id : 0
> >> cpu cores : 4
> >> ...
> >>
> >> I'm sure the system has 4 cores or 8 hyper-threads.
> >> Am I reading it wrong?
> >
> > Regarding the subject of you mail:
> >
> > Thats in total 8 siblings.
> >
> > So you divide 8 / 4 and get 2 siblings per core. I never seen any
> > hyperthreading with more than 2 siblings per core so far.
> >
> > Ciao,
>
> I guess I wasn't being clear: cpuid tells me I have 16 siblings:
>
> $ cpuid
[…]
> Extended brand string: " Intel(R) Core(TM) i7-2670QM CPU @
> 2.20GHz" CLFLUSH instruction cache line size: 8
> Initial APIC ID: 3
> Hyper threading siblings: 16
[…]
I think it is either making things up or getting some wrong information by
BIOS.
For the dualcore CPU in this ThinkPad T520 it tells also 16:
Extended brand string: " Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz"
CLFLUSH instruction cache line size: 8
Initial APIC ID: 3
Hyper threading siblings: 16
dmidecode got it right however:
merkaba:~> dmidecode | grep -i "Thread count"
Thread Count: 4
So I think there is a bug in cpuid.
Ciao,
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7
--
To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Archive: http://lists.debian.org/201211082345.28434.mar...@lichtvoll.de
