Developer Guide

Contents

Selecting Fabrics

Intel® MPI Library enables you to select a communication fabric at runtime without having to recompile your application. By default, it automatically selects the most appropriate fabric based on your software and hardware configuration. This means that in most cases you do not have to bother about manually selecting a fabric.
However, in certain situations specifying a particular communication fabric can boost performance of your application. The following fabrics are available:
Fabric
Network hardware and software used
shm
Shared memory (for intra-node communication only).
ofi
OpenFabrics Interfaces* (OFI)-capable network fabrics, such as Intel® True Scale Fabric, Intel® Omni-Path Architecture, InfiniBand* and Ethernet (through OFI API).
Use the
I_MPI_FABRICS
environment variable to specify a fabric. The description is available in the
Developer Reference
, section
Tuning Reference > Fabrics Control
.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.