HTT on single CPU?

John Baldwin jhb at
Wed Jul 9 14:47:20 PDT 2003

On 09-Jul-2003 Jens Rehsack wrote:
> Brooks Davis wrote:
>> P4's below ~3.1GHz do not actually provide logical CPU support.
> That's not true. German distributors sell P4 CPU's FSB 800
> (starting at 2.4GHz) which supports HTT.
> I know, that BSD didn't found 2 logical CPU's as John remarked,
> but I didn't understood why the CPU has the feature for HTT but
> no additional logical CPU's?

The bit just means that you can ask the CPU how many cores it
contains.  All P4's have this bit.  Early ones just say that they
contain only 1 core when you ask. :)


John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve!"  -

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