[Trillian-users] One Node, One Proc Per Node Jobs

[James Pringle]

I have seen this happen in other cray systems when the node-level
parallelization is done with openMP instead of MPI. (Or any other thread
instead of process level parallelization).

Jamie

On Tue, Dec 6, 2016 at 5:54 PM, Anderson, Robert <rea at sr.unh.edu> wrote:

> Just wanted to point out that at least one software package is not
> being reported correctly.  The NAMD package is being reported as a
> running on a single core, which is most likely a batch queuing
> error on my application script.  The code does run one process on the
> node but that process is multi-cored and heavily utilizes all of the
> nodes CPU resources.
>
> The performance clearly indicates full utilization, so I haven't been
> quick to spend time working out the clerical error in the batch
> system.   Perhaps there are reasons why fixing this should have a higher
> priority.
>
> Just adding a data point, not really trying to defend my laziness.  :)
>
> On Tue, 6 Dec 2016 17:24:00 +0000
> "Gorby, Matthew" <Matthew.Gorby at unh.edu> wrote:
>
> > Hello Trillian Users,
> >
> >
> > I'm seeing a lot of one node, one proc / node jobs running at the
> > moment.  If this is just the way "qstat -a" displays a type of run
> > I'm not familiar then please excuse this email.  If those jobs really
> > are what they appear to be then may we have one of the admins chime
> > in on this issue?  I'd like to know if that is an acceptable use of
> > Trillian's resources.  If not, it would be really great to have the
> > other 31/32 of those procs available.
> >
> >
> > Thanks,
> >
> >
> > -Matt
> >
> >
> >
>
>
>
> --
> --------------------------------------------------
> Robert E. Anderson -- (603) 862-3489
> Associate Director -- UNH Research Computing Center
> http://www.unh.edu/research/rcc
> --------------------------------------------------
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