Visible to Intel only — GUID: GUID-006264AE-06F0-4C3B-9F1E-5753E78140F6
Measuring Communication and Computation Overlap
Measuring Pure Communication Time
Iallgather
Iallgather_pure
Iallgatherv
Iallgatherv_pure
Iallreduce
Iallreduce_pure
Ialltoall
Ialltoall_pure
Ialltoallv
Ialltoallv_pure
Ibarrier
Ibarrier_pure
Ibcast
Ibcast_pure
Igather
Igather_pure
Igatherv
Igatherv_pure
Ireduce
Ireduce_pure
Ireduce_scatter
Ireduce_scatter_pure
Iscatter
Iscatter_pure
Iscatterv
Iscatterv_pure
Visible to Intel only — GUID: GUID-006264AE-06F0-4C3B-9F1E-5753E78140F6
Warm-Up Phase (IMB-MPI1, IMB-EXT, IMB-NBC, and IMB-RMA)
Before starting the actual benchmark measurement for IMB-MPI1, IMB-EXT, IMB-NBC, and IMB-RMA, the selected benchmark is executed N_WARMUP times with a sizeof(assign_type) message length.
The N_WARMUP value is defined in IMB_settings.h, see Parameters Controlling Intel(R) MPI Benchmarks for details. The warm-up phase eliminates the initialization overhead from the benchmark measurement.