From: Andrew Theurer <habanero@us.ibm.com>
To: "Grover, Andrew" <andrew.grover@intel.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Hyperthreading and physical/logical CPU identification
Date: Mon, 29 Apr 2002 14:59:51 -0500 [thread overview]
Message-ID: <200204292017.PAA25836@popmail.austin.ibm.com> (raw)
In-Reply-To: <59885C5E3098D511AD690002A5072D3C02AB7DF0@orsmsx111.jf.intel.com>
> > I would very much like to believe that in this configuration,
> > I am only
> > running on 2 physical, 4 logical processors, but I am getting a 31%
> > improvement (netbench) when hyperthreading is enabled. Thats
> > why I want to
> > confirm I am really only using 2 physical, 4 logical
> > processors. Is there
> > any way I can do this? (dmesg? /proc/cpuinfo?)
>
> Well the two alternatives are, either A) turning on hyperthreading enabled
> the two virtual processors or B) turning on hyperthreading somehow enabled
> the other two processors, right?
>
> I would think B would be highly unlikely.
>
> Anyone else who actually has HT hardware care to comment? ;-)
>
> Regards -- Andy
Yes, those are the two alternatives. I agree B is unlikely, but honestly I
thought a 31% improvement from hyperthreading seemed unlikely as well.
Believe me, I am hoping situaiton A is the correct one!
-Andrew
next prev parent reply other threads:[~2002-04-29 20:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-29 19:40 Hyperthreading and physical/logical CPU identification Grover, Andrew
2002-04-29 19:59 ` Andrew Theurer [this message]
2002-04-29 22:20 ` J.A. Magallon
2002-04-29 23:14 ` Jauder Ho
-- strict thread matches above, loose matches on Subject: below --
2002-04-29 20:41 Holzrichter, Bruce
2002-04-29 18:31 Andrew Theurer
2002-04-29 22:41 ` Martin J. Bligh
2002-04-30 17:00 ` Jack F. Vogel
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