What's New

This document reflects the updates for Intel® MPI Library 2019 Update 4 release for Linux* OS:

The following latest changes in this document were made:

Intel MPI Library 2019 Update 4

Intel MPI Library 2019 Update 3

Intel MPI Library 2019 Update 2

  • Bug fixes.

Intel MPI Library 2019 Update 1

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

For more complete information about compiler optimizations, see our Optimization Notice.
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