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From: Andrew Gallatin <gallatin@cs.duke.edu>
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Date: Wed, 8 Jan 2003 12:20:24 -0500 (EST)
To: John Baldwin <jhb@FreeBSD.org>
Cc: cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org
Subject: Re: cvs commit: src/sys/i386/i386 mp_machdep.c
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John Baldwin writes:

 > > BTW, I'm surprised as hell that HT is enabled on my cpu.  I did not
 > > think that the "older" 2.53Ghz/533MHz FSB P4s had HT.. this box is 2
 > > months old.  The board is an Intel Desktop D845EBG2.
 > 
 > Well, it might not be.  You would need to check your new dmesg to see
 > if it is.  Currently HT is only available on P4 Xeons.  The acpi_cpu

And the 3.06GHz P4s.  

Anyway, what's confusing me is that my cpu has CPU_HTT set in the
features: 

Features=0x3febfbff<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>

I guess what you're saying is that even though it has hyperthreading
set in the features list, it may not have multiple hyperthreading
cores, so HTT in the features might just be a red herring.

Yes, yes, I'll install a new kernel and reboot as soon as I can, but
that might be a few days.  My wife just started a CPU-intensive job on my
box that I can't interrupt.  Kudos to the person responsible for the
icc port btw..

Drew

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