Detection of HTT

[John Baldwin]

On Monday 15 November 2004 08:41 pm, Wilkinson, Alex wrote:
> Is it possible to find out whether HTT is turned on in the BIOS without
> having to reboot ? acpidump(8) ?
>
> It's just that I notice that I have a HTT capable CPU:
>
> CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2793.19-MHz 686-class CPU)
>   Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
>  
> Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MC
>A,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS, HTT,TM,PBE>
>
> And
>
> options   SMP
>
> compiled into the kernel,
>
> but lack any message in /var/run/dmesg about HTT being enabled.

FAQ (please search the archives in the future).  The 'HTT' bit in the Features 
line just means that your processor implements the registers that enumerate 
logical processors.  In other words, that feature means that we can ask the 
processor how many logical cores it has.  It can claim to only have one core 
though.  If it actually has multiple cores then we print the message during 
boot that you noticed in the other guy's dmesg.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org