• 2019 Update 7
  • 03/31/2020
Contents

Selecting Fabrics

Intel® MPI Library Developer Guide for Linux* OS
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

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804