Intel® MPI Benchmarks User Guide and Methodology Description

# 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® 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