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 IntelĀ® 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