Intel® MPI Benchmarks User Guide and Methodology Description

# Open_Close

The benchmark for the `MPI_File_open/MPI_File_close` functions. All processes open the same file. To avoid MPI implementation optimizations for an unused file, a negligible non-trivial action is performed with the file. See the basic definitions of the benchmark below.

## Open_Close Definition

Property | Description
--- | ---
Measured pattern | `MPI_File_open/MPI_File_close`
`etype` | `MPI_BYTE`
File type | `MPI_BYTE`
Reported timings | `t=Δt` (in `μsec`), as indicated in the figure below.
Reported throughput | None

## Open_Close Pattern