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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 81.5 6134.97 256 278.4 215517
Collective MPI_Reduce_Bcast-nodes
256 90.7 2756.34 256 282 13297.9

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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 2002-01-31