[Users] Einstein toolkit with Sun Grid Engine

Thu Oct 7 15:40:51 CDT 2021

Chris

It might not be necessary to hard-code the number of threads. You can use
arbitrary Python expressions via "@( ... )@" in the templates. See e.g. the
template for Blue Waters which uses this to choose between CPU and GPU
queues.

-erik

On Thu, Oct 7, 2021 at 4:04 PM Chris Stevens <chris.stevens at canterbury.ac.nz>
wrote:

> Hi Roland,
>
> That's fantastic, thanks for linking those files.
>
> It works as expected with only MPI processes. I am careful in compiling
> and running with the same (and only) OpenMPI installation on the cluster,
> so this should be OK.
>
> Finding a Slurm to SGE conversion table, there is no SGE equivalent to
> ncpus-per-task from Slurm, rather it is the allocation type of the given
> parallel environment that does this. I.e. the backend.
>
> https://srcc.stanford.edu/sge-slurm-conversion
>
> Further, in the submit script of ranger, the crucial line
>
> #$ -pe @(@PPN_USED@/@NUM_THREADS@)@way @PROCS_REQUESTED@
>
> shows that you request @PROCS_REQUESTED@ slots (as I currently have) and
> the first argument shows that the name of the parallel environment is
> dependent upon @NUM_THREADS at . From what I take from this, I need to set
> up a parallel environment that has hardcoded the number of threads I want
> per MPI process and then use that parallel environment. I'll see how I go
> there, but it isn't initially obvious how to do this!
>
> Cheers,
>
> Chris
>
>
>
>
>
>
>
> *Dr Chris Stevens*
>
> *Lecturer in Applied Mathematics*
>
> Rm 602, Jack Erskine building
>
> School of Mathematics and Statistics
>
> T: +64 3 369 0396 (Internal 90396)
>
> University of Canterbury | Te Whare Wānanga o Waitaha
>
> Private Bag 4800, Christchurch 8140, New Zealand
>
> http://www.chrisdoesmaths.com
>
> *Director*
> SCRI Ltd
> http://www.scri.co.nz
>
>
> ------------------------------
> *From:* Roland Haas
> *Sent:* Thursday, October 07, 2021 06:22
> *To:* Chris Stevens
> *Cc:* users at einsteintoolkit.org
> *Subject:* Re: [Users] Einstein toolkit with Sun Grid Engine
>
> Hello Chris,
>
> We used SGE a long time ago on some of the TACC machines.
>
> You can find an old setup for TACC's Ranger cluster in an old commit
> like so:
>
> git checkout fed9f8d6fae4c52ed2d0a688fcc99e51b94e608e
>
> and then look at the "ranger" files in OUTDATED subdirectories of
> machines, runscripts, submitscripts.
>
> Having all MPI ranks on a single node might also be caused by using
> different MPI stacks when compiling and when running so you must make
> sure that the "mpirun" (or equivalent command) you use is the one that
> belongs to the MPI library that you used when linking your code.
>
> Finally you may also have to check if this is an issue with threads and
> MPI ranks. Ie I would check if things are still wrong if you use only
> MPI processes and no OpenMP threads at all (in that case you would have
> to check what SGE counts: threads (cores) or MPI ranks (processes)).
>
> Yours,
> Roland
>
> > Hi everyone,
> >
> > I have set up the Einstein toolkit on a local cluster of 20 nodes with
> the SGE scheduler. I have not seen any examples of this scheduler being
> used with the Einstein toolkit.
> >
> > I have managed to get it working; however it seems if I ask for a
> certain number of slots that requires more than one node, it correctly
> allocates these, however all processes and threads are run on the one node
> and is oversubscribed.
> >
> > My question is whether anybody has used SGE with the Einstein toolkit
> and if this is a good thing or not? If it is possible, I can send more
> details if there are people willing to help solve this inter-node
> communication problem.
> >
> > Thanks in advance,
> >
> > Chris
> >
> > [cid:29d54967-59c8-486e-adea-80af7ce2cc49]
> >
> >
> > [cid:55ebbbb5-1e12-45a2-8d51-206c70460c36]
> >
> >
> >
> > Dr Chris Stevens
> >
> > Lecturer in Applied Mathematics
> >
> > Rm 602, Jack Erskine building
> >
> > School of Mathematics and Statistics
> >
> > T: +64 3 369 0396 (Internal 90396)
> >
> > University of Canterbury | Te Whare Wānanga o Waitaha
> >
> > Private Bag 4800, Christchurch 8140, New Zealand
> >
> >
> https://urldefense.com/v3/__http://www.chrisdoesmaths.com__;!!DZ3fjg!rvExVfoK3iWdskfjDNUxwMCUktw9L_Wt8NTaikC7HLu245hE370Ok_JYsZduIoBu$
> <
> https://urldefense.com/v3/__http://www.chrisdoesmaths.com/__;!!DZ3fjg!rvExVfoK3iWdskfjDNUxwMCUktw9L_Wt8NTaikC7HLu245hE370Ok_JYsfTVv_dN$
> >
> >
> >
> > Director
> > SCRI Ltd
> >
> https://urldefense.com/v3/__http://www.scri.co.nz__;!!DZ3fjg!rvExVfoK3iWdskfjDNUxwMCUktw9L_Wt8NTaikC7HLu245hE370Ok_JYsaY3VCkl$
> <
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> >
> >
>
>
>
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-- 
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http://www.perimeterinstitute.ca/personal/eschnetter/
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