cannam@95: Previous: MPI Plan Creation, cannam@95: Up: FFTW MPI Reference cannam@95:
To facilitate synchronizing wisdom among the different MPI processes, cannam@95: we provide two functions: cannam@95: cannam@95:
void fftw_mpi_gather_wisdom(MPI_Comm comm); cannam@95: void fftw_mpi_broadcast_wisdom(MPI_Comm comm); cannam@95:cannam@95:
The fftw_mpi_gather_wisdom function gathers all wisdom in the
cannam@95: given communicator comm to the process of rank 0 in the
cannam@95: communicator: that process obtains the union of all wisdom on all the
cannam@95: processes. As a side effect, some other processes will gain
cannam@95: additional wisdom from other processes, but only process 0 will gain
cannam@95: the complete union.
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The fftw_mpi_broadcast_wisdom does the reverse: it exports
cannam@95: wisdom from process 0 in comm to all other processes in the
cannam@95: communicator, replacing any wisdom they currently have.
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See FFTW MPI Wisdom. cannam@95: cannam@95: cannam@95: cannam@95: