HTT on single CPU?

Wilko Bulte wkb at freebie.xs4all.nl
Wed Jul 9 10:26:42 PDT 2003


On Wed, Jul 09, 2003 at 10:14:47AM -0500, Thomas T. Veldhouse wrote:

I can confirm my 2.4G P4 does have HTT:

Jul  8 00:11:48 freebie /kernel: CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2405.46 -MHz 686-class CPU)
Jul  8 00:11:48 freebie /kernel: Origin = "GenuineIntel"  Id = 0xf29 Stepping = 9
Jul  8 00:11:48 freebie /kernel: Features=0xbfebfbff<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,HTT,TM,PBE>
Jul  8 00:11:48 freebie /kernel: Hyperthreading: 2 logical CPUs
Jul  8 00:11:48 freebie /kernel: real memory  = 536018944 (523456K bytes)
Jul  8 00:11:48 freebie /kernel: avail memory = 517664768 (505532K bytes)
Jul  8 00:11:48 freebie /kernel: Preloaded elf kernel "kernel" at
0xc03d0000.

W/

> Actually, a 2.4 could have HT.
> 
> "Intel extends Hyper-Threading Technology? to a variety of desktop PCs, with
> the new Intel® Pentium® 4 processor, featuring an advanced 800 MHz system
> bus and speeds ranging from 2.40C to 3.20 GHz. Hyper-Threading Technology
> from Intel enables the processor to execute two threads (parts of a software
> program) in parallel - so your software can run more efficiently and you can
> multitask more effectively."
> 
> 
> ----- Original Message -----
> From: "Brooks Davis" <brooks at one-eyed-alien.net>
> To: "Jens Rehsack" <rehsack at liwing.de>
> Cc: "Andrey Chernov" <ache at nagual.pp.ru>; <freebsd-current at freebsd.org>;
> "Lukas Ertl" <l.ertl at univie.ac.at>
> Sent: Wednesday, July 09, 2003 10:07 AM
> Subject: Re: HTT on single CPU?
> 
> On Wed, Jul 09, 2003 at 02:47:18PM +0200, Jens Rehsack wrote:
> > Andrey Chernov wrote:
> >
> <snip>
> >
> Features=0xbfebfbff<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,HTT,TM,PBE>
> 
> P4's below ~3.1GHz do not actually provide logical CPU support.
> 
> -- Brooks
> 
> 
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-- 
|   / o / /_  _   		wilko at FreeBSD.org
|/|/ / / /(  (_)  Bulte				


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