A new stable release of MPICH, 3.4.1, is now available for download. This is the first bug-fix release in the 3.4.x series. This release contains critical fixes for GPU support and addresses a compatibility issue for MPI applications that use jansson (https://digip.org/jansson/) for manipulating JSON data.
You can find the release on our downloads page (https://www.mpich.org/downloads/) Production environments are encouraged to upgrade to this release.
Regards,
The MPICH team
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Changes in 3.4.1
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# Fix bug in GPU memory hooks that caused failures with NCCL
# Fix bug in GPU-aware nonblocking op collectives
# Hide symbols from embedded json-c module
# Removed anonymous struct/union usage in MPL
# Disable Java support in embedded UCX module
A full list of changes is available at the following link:
https://github.com/pmodels/mpich/compare/v3.4...v3.4.1
A new stable release of MPICH, 3.4, is now available for download. This is the first stable release in the 3.4.x series. In this series, ch4 replaces ch3 as the default device configuration. New features include GPU support, multi-VCI communication (experimental), XPMEM support, DAOS support in ROMIO (thanks to Intel contribution), and business card exchange enhancements.
Also in this release are several bug fixes and improvements in ch3, hydra, and common MPICH code. You can find the release on our downloads
page (https://www.mpich.org/downloads/)
Production environments are encouraged to upgrade to this release.
Regards,
The MPICH team
===============================================================================
Changes in 3.4
===============================================================================
# ch4 replaces ch3 as the default device configuration.
# Add support for Yaksa datatype engine (default in ch4).
# Add support for GPU buffers (CUDA, Level Zero) in pt2pt,
collectives, and one-sided communication.
# Add support for XPMEM.
# Add support for multiple virtual communication interfaces for more
efficient MPI_THREAD_MULTIPLE (experimental).
# Add DAOS ADIO driver to ROMIO (contributed by Intel).
# Add Quobyte ADIO driver to ROMIO (contributed by Quobyte).
# Add support for Arm compiler toolchain
# Add support for flang/f18 Fortran compiler
# Add support for AddressSanitizer and UndefinedBehaviorSanitizer to
debug configuration
# Remove mxm, llc, and portals4 netmods from ch3.
# Remove support for logical reduction operations on floating point
types.
# Remove MPIX_Mutex interfaces.
# Further improvements to ch4 business card exchange: extra
long address support and fixes for PMIx integration.
# Un-inline non-critical ch4 code for improved build times.
# Fix several test program bugs.
# Fix several static analysis and compiler warnings.
# Change the signature of MPID_Init to include requested and provided
thread levels.
A full list of changes is available at the following link:
https://github.com/pmodels/mpich/compare/v3.3...v3.4
