Dual core processors

[Jeff Mohler]

My dmesg matches yours Juha..

Would enabling Hyperthreading increase any of my processing power?



On 11/14/06, Juha Saarinen <juhasaarinen at gmail.com> wrote:
> On 11/15/06, Robert Fitzpatrick <lists at webtent.net> wrote:
> > Looks like my hyperthreading is enabled and it is in the BIOS. I was
> > told there was a dual-core in the machine, but not confirmed. But there
> > should be two with HT anyway as seen, correct?
>
> This is a dmesg from an Intel D830 box:
>
> CPU: Genuine Intel(R) CPU 3.20GHz (3217.43-MHz 686-class CPU)
> Origin = "GenuineIntel"  Id = 0xf47  Stepping = 7
> Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,P
> SE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>   Features2=0x649d<SSE3,RSVD2,MON,DS_CPL,EST,CNTX-ID,CX16,<b14>>
>   AMD Features=0x20100000<NX,LM>
>   AMD Features2=0x1<LAHF>
>   Cores per package: 2
>
> I think you do have a single processor with hyperthreading (logical
> CPUs) and not a dual-core model.
>
> To get hyperthreading up and running, you need to add:
>
> machdep.hyperthreading_allowed=1
>
> to /etc/sysctl.conf or change it manually. Please google for the
> security implications of doing this first though.
>
>
> --
> Juha
> http://www.geekzone.co.nz/juha
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