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Comp. MPI_Allreduce-nodes and MPI_Reduce_Bcast-nodes

\epsfig{file=col_MPI_Allreduce-nodes.comp032.eps}
msg. len. latency bandwidth msg. len latency bandwidth
[units] [$\mu$s] [1024 units/s] [units] [$\mu$s] [1024 units/s]
Min. msg. length Max. msg. length
(other params also min.) (other params also max.)
Collective MPI_Allreduce-nodes
256 657 761.035 256 1943 7205.35
Collective MPI_Reduce_Bcast-nodes
256 646.7 386.578 256 1931.8 905.891

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Next: Comp. MPI_Allreduce-length and MPI_Reduce_Bcast-length Up: Comparisons Previous: Comp. MPI_Allreduce-length and MPI_Reduce-length   Contents
Per Ekman 2002-01-29