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
Date: Fri, 10 Jan 2003 00:20:17 +0000 [thread overview]
Message-ID: <20030110002016.GB8319@codemonkey.org.uk> (raw)
In-Reply-To: <slrnb1rlct.g2c.lunz@stoli.localnet>
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
next prev parent reply other threads:[~2003-01-10 0:14 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-09 20:02 detecting hyperthreading in linux 2.4.19 Jason Lunz
2003-01-09 21:37 ` James Cleverdon
2003-01-09 21:54 ` John Bradford
2003-01-10 0:16 ` James Cleverdon
2003-01-10 0:58 ` Mike Dresser
2003-01-09 21:57 ` Jason Lunz
2003-01-10 12:29 ` Mark Hounschell
2003-01-10 7:05 ` Mikael Pettersson
2003-01-10 11:05 ` Dave Jones
2003-01-10 11:19 ` Mikael Pettersson
2003-01-10 0:20 ` Dave Jones [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-01-09 22:29 Kamble, Nitin A
2003-01-09 23:26 Pallipadi, Venkatesh
2003-01-10 8:16 Pallipadi, Venkatesh
2003-01-10 8:43 ` Mikael Pettersson
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