Intel® MPI Library

Examples of MPI Failures

This section provides examples of typical MPI failures including descriptions, output messages, and related recommendations. The following problems which may cause MPI failures are discussed in this section:

  • Communication problems

  • Environmental problems

  • Other problems

Application Specific Tuning

In the application specific mode, you can find optimal Intel® MPI Library settings for your specific application. To enable this mode, use the --application (-a) option of mpitune. The option takes the full program launch command as an argument. The general syntax is as follows:

File System Support

Intel® MPI Library provides loadable shared modules to provide native support for the following file systems:

  • Panasas* ActiveScale* File System (PanFS)

  • Lustre* File System

  • IBM* General Parallel File System* (GPFS*)

Interoperability with OpenMP API

I_MPI_PIN_DOMAIN

Intel® MPI Library provides an additional environment variable to control process pinning for hybrid MPI/OpenMP* applications. This environment variable is used to define a number of non-overlapping subsets (domains) of logical processors on a node, and a set of rules on how MPI processes are bound to these domains by the following formula: one MPI process per one domain. See the picture below.

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