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
Window
This is the benchmark for measuring the overhead of an MPI_Win_create/MPI_Win_fence/MPI_Win_free combination. In the case of an unused window, a negligible non-trivial action is performed inside the window. It minimizes optimization effects of the MPI implementation.
The MPI_Win_fence function is called to properly initialize an access epoch. This is a correction as compared to earlier releases of the Intel(R) MPI Benchmarks.
See the basic definitions and a schematic view of the pattern below.
Window Definition
Property |
Description |
---|---|
Measured pattern |
MPI _Win_create/MPI_Win_ fence/MPI_Win_free |
Reported timings |
t=Δt(M) (in μsec) as indicated in the figure below. |
Reported throughput |
None |
Window Pattern
