[petsc-dev] Swarm tag error

[Matthew Knepley]

In data_ex.c, Swarm uses a distinct tag for each pair of processes. If the
number of processes exceeds 1024, there are > 1024^2 tags which exceeds
MPI_TAG_UB on Intel MPI.

My solution is going to be to use that process pair number modulo
MPI_TAG_UB. Does anyone have a slicker suggestion?

  Thanks,

      Matt

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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