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March 2005

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Subject:
Re: Hyperthreading...
From:
Luke Scharf <[log in to unmask]>
Reply To:
Luke Scharf <[log in to unmask]>
Date:
Tue, 15 Mar 2005 22:22:37 -0500
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On Fri, 2005-03-11 at 04:17, Steve Traylen wrote:
> On Fri, Mar 11, 2005 at 10:41:12AM +1000 or thereabouts, Michael Mansour wrote:
> > Hi,
> > 
> > I'd just like to confirm this. I have a P4 3.06GHz HT cpu running SL303.
> > Hypthreading is enabled.
> > 
> > Do I need to run the SMP kernel to take advantage of the HT support?
> Hi Michael,
> 
> Yes you do otherwise you will only find one CPU.

Yes, but it's worth mentioning if one CPU is doing something that keeps
it truly busy, the other CPU will be slow.  And the speed of the "other"
CPU will depend on what exactly you are doing.

It's not like HT provides two real CPUs -- but HT does require the SMP
kernel to be useful.

-Luke

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