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.