Re: HT not active

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Mon, 14 Aug 2006, Lennart Sorensen wrote:

> On Mon, Aug 14, 2006 at 10:51:47AM -0400, linux-os (Dick Johnson) wrote:
>> It's mostly a motherboard issue. This board is an Intel motherboard.
>> However, Intel decided to not allow HT (strange). I tried to
>> bring the MB back to CompUSA, but they declared; "The board is
>> not defective. Windows doesn't use hyper threading, and this is
>> a windows-only board...." They claim no board is compatible with
>> Linux. They were perfectly willing to give me back my money, but
>> they would not guarantee that any of their motherboards were
>> "compatible" with Linux. With an attitude like that, one can
>> quickly learn where not to buy motherboards.
>
> It is both a motherboard (bios actually) and cpu issue.
>
>> processor	: 0
>> vendor_id	: GenuineIntel
>> cpu family	: 15
>> model		: 2
>> model name	: Intel(R) Pentium(R) 4 CPU 2.80GHz
>> stepping	: 7
>> cpu MHz		: 2794.381
>> cache size	: 512 KB
>> fdiv_bug	: no
>> hlt_bug		: no
>> f00f_bug	: no
>> coma_bug	: no
>> fpu		: yes
>> fpu_exception	: yes
>> cpuid level	: 2
>> wp		: yes
>> flags		: 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 ht tm pbe cid xtpr
>> bogomips	: 5592.62
>
> I have a P4 2.8GHz which does do HT.  It is family 15, model 2, stepping
> 9.  Stepping 7 is probably from just before intel started enabling HT
> support.  The P4A Northwood did not have HT and came in 1.6 to 2.8GHz
> (400FSB).  The P4B Northwood did have HT on the 3.06Ghz model only and
> came in 2.0 to 3.06Ghz (533FSB).  The P4C Northwood had HT and came
> in 2.4 to 3.4GHz (800FSB).  I have the P4C 2.8GHz which is showing as
> model 2 stepping 9.
>
>> The solution may be, in the future, to bring a bootable CR/ROM with you
>> when buying motherboards or CPUs.... and get stuff off the net that's
>> guaranteed to do what you want. This exact same software, exact same
>> configuration ".config" file, produces this on another machine:
>
> Who wants to buy a power wasting P4 now, when they can instead get the
> Core 2 or an Athlon 64 which run faster using less power?

They are now pretty cheap in the USA. Being obsolete by a year
or so gets some good performance at the additional electrical
cost of a nightlight!

>
>> processor	: 0
>> vendor_id	: GenuineIntel
>> cpu family	: 15
>> model		: 2
>> model name	: Intel(R) Xeon(TM) CPU 2.40GHz
>> stepping	: 9
>> cpu MHz		: 2399.779
>> cache size	: 512 KB
>> physical id	: 0
>> siblings	: 2
>> core id		: 0
>> cpu cores	: 1
>> fdiv_bug	: no
>> hlt_bug		: no
>> f00f_bug	: no
>> coma_bug	: no
>> fpu		: yes
>> fpu_exception	: yes
>> cpuid level	: 2
>> wp		: yes
>> flags		: 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 ht tm pbe cid xtpr
>> bogomips	: 4804.62
>
> So this is a model 2 stepping 9 just as my P4 is and HT works just like
> my P4 does.
>
> I can't actually find a list that says when stepping had what feature
> enabled.
>
> --
> Len Sorensen
>

Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.24 on an i686 machine (5592.62 BogoMips).
New book: http://www.AbominableFirebug.com/
_


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