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Date: Fri, 20 Feb 2009 13:09:46 -0500
To: martinko <gamato@users.sf.net>, freebsd-stable@freebsd.org
From: Mike Tancsa <mike@sentex.net>
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Subject: Re: What is the real number of CPUs ? -- was: Re: Problem with
 new Intel DX board and i7 Processor on reboot   attempt (locks)
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At 06:30 PM 2/19/2009, martinko wrote:

>Hi,
>
>I don't get the numbers of CPUs -- AFAIK Core i7 has 4 cores with 2 
>logical CPUs per core (hyper-threading?) and that makes 8 logical 
>CPUs.  Above I see 8 cores per package (!) _but_ 8 x 2 = 16 while 
>only 8 CPUs are detected and started.  Could someone explain pls ?

The CPU is as you said, 4 actual cores plus their new HT tech.  In 
the tests I did, the HT did help with compile times under RELENG_7

http://lists.freebsd.org/pipermail/freebsd-performance/2008-December/003635.html

         ---Mike