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Multi threading version #156

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trueman1990 opened this issue Jul 11, 2019 · 2 comments
Open

Multi threading version #156

trueman1990 opened this issue Jul 11, 2019 · 2 comments

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@trueman1990
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trueman1990 commented Jul 11, 2019 •
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Is still a Multi-threading version offer now?
@laprej
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laprej commented Jul 11, 2019

tl;dr No, ROSS does not currently support threading.

As far as I know all threading support within ROSS has been removed. It happened quite some time ago when the decision was made to only support MPI. In recent years, however, some of the supercomputer vendors are once again encouraging the use of threads. @carothersc may have an old version of ROSS that still has threading support.

@caitlinross
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Yeah, Justin is right. I removed any remaining threading support recently because there are no plans to go to a hybrid MPI/pthreads version of ROSS. There is a shared memory version which still uses only MPI, but MPI ranks that are colocated on a compute node use event buffers from a shared memory segment for on-node events. This hasn't been merged into the master branch of ROSS yet though for various reasons.

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@laprej @trueman1990 @caitlinross