[GE users] Ring-fencing CPUs?

John Leidel john.leidel at gmail.com
Fri May 2 13:22:44 BST 2008


James, Reuti is correct.  However, if your job is doing any serious
threading or spawn any child processes, you can't implicitly guarantee
that the processes will not land on your "reserved" cpus.  The only way
to guarantee this is via some sort of processor affinity.  

[there has been talk on the sge dev list on supporting this situation in
future]

...feel free to chime in here Rayson/Shannon

cheers
john 

On Fri, 2008-05-02 at 12:44 +0200, Reuti wrote:
> Hi,
> 
> Am 02.05.2008 um 12:38 schrieb James Gibbon:
> 
> > This may be a naive question - but is it possible to set up a multi
> > -processor SGE client so that one or more of its CPUs aren't  
> > touched by
> > SGE jobs - so that they are reserved for non-SGE applications?
> 
> just define less slots in the queue definition than cores are in the  
> machine.
> 
> -- Reuti
> 
> 
> > Thanks,
> > James
> >
> >
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