Message-ID: <40D0A63F.9000809@comcast.net>
Date: Wed, 16 Jun 2004 15:57:51 -0400
From: David van Hoose <david.vanhoose@comcast.net>
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To: Robert Love <rml@ximian.com>
CC: Phy Prabab <phyprabab@yahoo.com>, linux-kernel@vger.kernel.org
Subject: Re: Programtically tell diff between HT and real
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Robert Love wrote:
> On Wed, 2004-06-16 at 13:56 -0400, Robert Love wrote:
> 
> 
>>Yah.  Look at /proc/cpuinfo.
>>
>>Virtual processors have different 'processor' values but the same
>>'physical id', while physical processors obviously have different values
>>for both.
> 
> 
> Oh, and if you just want to see if a processor supports HT - the 'ht'
> flag is set in 'flags' in /proc/cpuinfo.

Not always true. I have a non-HT Pentium4, but I still have ht in my 
flags. The same goes for a couple of dual Xeon's I work on at school. 
Aparently Intel disabled the HT on a lot of Pentium 4 and Xeon chips, 
but left the HT flag behind. My system even has the additional IO-APICs 
too. Hence why everytime I boot a UP kernel, I get an 'unexpected 
IO-APIC' message.

Cheers,
David
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