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Date: Fri, 10 Jan 2003 00:20:17 +0000
From: Dave Jones <davej@codemonkey.org.uk>
To: Jason Lunz <lunz@falooley.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: detecting hyperthreading in linux 2.4.19
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On Thu, Jan 09, 2003 at 08:02:33PM +0000, Jason Lunz wrote:
 > Is there a way for a userspace program running on linux 2.4.19 to tell
 > the difference between a single hyperthreaded xeon P4 with HT enabled
 > and a dual hyperthreaded xeon P4 with HT disabled? The /proc/cpuinfos
 > for the two cases are indistinguishable.

Check out x86info[1]. It should do the right thing in both cases.
It counts siblings, and also checks the BIOS MP table.

		Dave

[1] http://www.codemonkey.org.uk/x86info/
		
-- 
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs
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