What's New

This document reflects the updates for Intel® MPI Library 2019 release for Linux* OS:

The following latest changes in this document were made:

Intel MPI Library 2019

• Document overhaul to align with supported functionality.

• Removed the I_MPI_HARD_FINALIZE, I_MPI_MIC, I_MPI_ENV_PREFIX_LIST, I_MPI_TUNE*, I_MPI_ENV_PREFIX_LIST,I_MPI_JOB_FAST_STARTUP,I_MPI_FALLBACK, I_MPI_DAPL*, I_MPI_LARGE_SCALE_THRESHOLD, I_MPI_OFA*, I_MPI_TCP*, I_MPI_TMI* environment variables.

• Removed the -hostos option from Local Options.

• Added the I_MPI_OFI_LIBRARY_INTERNAL environment variable to OFI-capable Network Fabrics Control.

• Added an option for setting MPI_UNIVERSE_SIZE to Global Options.

• Added new collective operations to I_MPI_ADJUST Family Environment Variables.

• Added new variables I_MPI_SHM_CELL_EXT_SIZE and I_MPI_SHM_CELL_EXT_NUM_TOTAL to Shared Memory Control.

• Added impi_info utility.

• Updated mpitune utility.

• Updated the topic Environment Variables for Asynchronous Progress Control.

• Added environment variables for Multi-EP (I_MPI_THREAD_SPLIT, I_MPI_THREAD_RUNTIME, I_MPI_THREAD_MAX, I_MPI_THREAD_ID_KEY).

• Examples are now available as a part of Intel® MPI Library Developer Guide

Intel MPI Library 2018 Update 3

• Added new algorithms for I_MPI_ADJUST_ALLREDUCE to I_MPI_ADJUST Family.

Intel MPI Library 2018 Update 2

• Improved shm performance with collective operations (I_MPI_THREAD_YIELD)

• Bug fixes

Intel MPI Library 2018 Update 1

• Added the environment variable I_MPI_STARTUP_MODE in Other Environment Variables.

Intel MPI Library 2018

• Removed support of the Intel® Xeon Phi™ coprocessors (formerly code named Knights Corner).

• Changes in environment variables:

  • I_MPI_DAPL_TRANSLATION_CACHE is now disabled by default

  • I_MPI_HARD_FINALIZE is now enabled by default for the OFI and TMI fabrics

  • I_MPI_JOB_FAST_STARTUP is now intended for OFI and TMI fabrics only

  • Default value change for I_MPI_FABRICS_LIST

• The -mps option has been replaced with -aps.

• Added environment variables I_MPI_{C,CXX,FC,F}FLAGS, I_MPI_LDFLAGS and I_MPI_FORT_BIND in Compilation Environment Variables.

• Added environment variables I_MPI_OFI_ENABLE_LMT and I_MPI_OFI_MAX_MSG_SIZE in OFI-capable Network Fabrics Control.

Intel MPI Library 2017 Update 2

• Added the environment variable I_MPI_HARD_FINALIZE in Other Environment Variables.

• Added the environment variable I_MPI_MEMORY_SWAP_LOCK in Memory Placement Policy Control.

Intel MPI Library 2017 Update 1

• The environment variable I_MPI_SLURM_EXT (Other Environment Variables) is now enabled by default.

• Added a new algorithm for I_MPI_ADJUST_GATHER and related environment variable I_MPI_ADJUST_GATHER_SEGMENT (I_MPI_ADJUST Family).

• Added the environment variable I_MPI_PORT_RANGE in Hydra Environment Variables.

Intel MPI Library 2017

• Document layout changes.

• Updated the topic Memory Placement Policy Control.

• Added the environment variables I_MPI_OFI_DIRECT_RMA and I_MPI_OFI_DSEND in OFI*-capable Network Fabrics Control.

• Added a new topic Asynchronous Progress Control.

• Added the environment variable I_MPI_LUSTRE_STRIPE_AWARE in File System Support.

• Added the environment variable I_MPI_SLURM_EXT in Other Environment Variables.

• Updated the Table: Environment Variables, Collective Operations, and Algorithms in I_MPI_ADJUST Family.

• Added the following environment variables in I_MPI_ADJUST Family:

  • I_MPI_ADJUST_<COLLECTIVE>_SHM_KN_RADIX

  • I_MPI_COLL_INTRANODE