[torqueusers] ncpus anyone?

Garrick Staples garrick at usc.edu
Mon Mar 1 14:31:18 MST 2010


On Mon, Mar 01, 2010 at 02:18:36PM -0700, David Beer alleged:
> Hi all,
> 
> I'm wondering if anyone uses ncpus for TORQUE (in the 2.3 and beyond versions). From looking through the users list's old entries, it seems that a lot of people are confused about this attribute and sometimes just decide to avoid it. From my testing, which I admit isn't extensive, it seems that this attribute is almost completely meaningless. For example, if a job is submitted with -l ncpus=10, it still appears to only run in one place. I see this in pbsnodes -a:
> 
> jobs = 0/83.napali
> 
> despite the fact that:
> 
>     Resource_List.ncpus = 10
> 
> appears in qstat -f's output. I'm wondering if there's anyone out there successfully using this feature, because it looks to me that TORQUE doesn't do anything with ncpus in its current state.
> 
> Thanks for any light you can shed on this,

It requests cpus on 1 machine.  It is useful with large single system image
machines (SMP or NUMA).

-- 
Garrick Staples, GNU/Linux HPCC SysAdmin
University of Southern California

Life is Good!
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