Enabling HTT On A Uniproc w/4.11-Stable

Gray Lilley gray at mistaken-identity.co.uk
Sun Apr 17 03:22:43 PDT 2005

>From what I understand, p4 2.00ghz processors are not HTT capable? I own one and its not capable of hyperthreading.

FWIW, the first p4 that supported HTT was the 2.40C I believe.



-----Original Message-----
From: owner-freebsd-stable at freebsd.org [mailto:owner-freebsd-stable at freebsd.org] On Behalf Of Tim Daneliuk
Sent: 17 April 2005 09:42
To: freebsd-stable at freebsd.org
Subject: Re: Enabling HTT On A Uniproc w/4.11-Stable

Thanks for the prompt response!

 > On Sun, 2005-Apr-17 01:50:51 -0500, Tim Daneliuk wrote:
 >> How do I enable hyperthreading on a Uniprocessor p4 system.
 >> I tried my usual SMP kernel options (SMP and APIC) but, of course,  >> the kernel cannot find an APIC.  I have set the appropriate option  >> in loader.conf to enable hyperthreading but, No Joy.  Should I  >> use the SMP option alone here?
 > You definitely need APIC for SMP and the APIC is part of the iA32 spec  > so I'm sure you have one somewhere.  At a quick guess, I suspect you  > haven't enabled the APIC in your BIOS - check for an option that  > allows you to select between PIC and APIC interrupt types.

There seems to be no such option on this MB.

 > If that's not the problem, we need more information: Motherboard/BIOS  > type and at least the beginning of a verbose boot (down to about the  > pci0 probe).

Machine is a Gateway
BIOS appears to be Intel - well there is no other BIOS mfg named.
BIOS ID is: PT84510A.15A.0004.P02.0112051220

Here is some of the dmesg - I infer from the Features line that HTT means this is hyperthread-enabled:


FreeBSD 4.11-STABLE #1: Fri Apr 15 03:41:33 CDT 2005
     toor at security.tundraware.com:/usr/obj/usr/src/sys/UNI
Timecounter "i8254"  frequency 1193182 Hz
CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz (1993.54-MHz 686-class CPU)
   Origin = "GenuineIntel"  Id = 0xf24  Stepping = 4

real memory  = 536608768 (524032K bytes) avail memory = 516800512 (504688K bytes) Preloaded elf kernel "kernel" at 0xc052b000.
Warning: Pentium 4 CPU: PSE disabled
VESA: v3.0, 65536k memory, flags:0x1, mode table:0xc0493502 (1000022)
VESA: NVidia
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 13 entries at 0xc00f2ce0
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82845 Host 4o PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
agp0: <Intel 82845 host to AGP bridge> mem 0xf8000000-0xfbffffff at device 0.0 on pci0

Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/

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