Matthew Knepley <[email protected]> writes: > I would use MPI, but I would use > > http://www.mpich.org/static/docs/v3.1/www3/MPI_Scan.html > > which will give you all the partial sums at once.
Yes, MPI_Scan if you want the owner of each x to know ∫_a^x f MPI_Allreduce if you want everyone to know ∫_a^y f for a single y known globally.
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