Dual P4 2.4Ghz Xeon With Hyperthreading enabled...

[Brooks Davis]

On Tue, Aug 12, 2003 at 05:26:42PM -0600, Stephane Raimbault wrote:
> Hi Brooks,
> 
> Thanks for responding...
> 
> However I'm confused by the terms used.  Are you saying if I set it to 0, I
> would be using the processing power of all CPU's?  I'm not sure how this
> halted comes in to play, cuz the only thing that comes to mind is to halt
> the machine as in shutdown....  I'm probably confusing terms here... can you
> expand and clarify?  I just want to make sure what this all means.  Also is
> this an option that can be modified via sysctl -w and the /etc/sysctl.conf
> file ?  Or is this going to have to be set in a boot option?

When halted, the logical CPUs are rendered unavailable.  This is the
default.  If you want the logical CPUs to work, you see the boolean
sysctl to 0 telling the kernel to let them work.  You can set the option
any time you want.

-- Brooks
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