Compatibility Control

I_MPI_COMPATIBILITY

Select the runtime compatibility mode.

Syntax

I_MPI_COMPATIBILITY=<value>

Arguments

<value>

Define compatibility mode

not defined

The MPI-3.0 standard compatibility. This is the default mode

3

The Intel® MPI Library 3.x compatible mode

4

The Intel® MPI Library 4.0.x compatible mode

Description

Set this environment variable to choose the Intel® MPI Library runtime compatible mode. By default, the library complies with the MPI-3.0 standard. If your application depends on the MPI-2.1 behavior, set the value of the environment variable I_MPI_COMPATIBILITY to 4. If your application depends on the pre-MPI-2.1 behavior, set the value of the environment variable I_MPI_COMPATIBILITY to 3.