A new alpha release of MPICH, 4.0a2, is now available for download. This is the second alpha release in the 4.0 series. This release contains full implementations for the just-published MPI 4.0 specification. It also includes a significant amount of bug fixes and enhancements in GPU and threading support. The release is fully backward compatible.
You can find the release on our downloads page (https://www.mpich.org/downloads/) Users are welcome to test this release.
Regards,
The MPICH team
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Changes in 4.0
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# All MPI-4 APIs have been implemented. Major MPI-4 features include MPI
sessions, partitioned point-to-point communications, events in the MPI tool
information interface, large-count functions, persistent collectives,
MPI_Comm_idup_with_info, MPI_Isendrecv and MPI_Isendrecv_replace,
MPI_Info_get_string, MPI_Comm_split_type with new split_type --
MPI_COMM_TYPE_HW_GUIDED and MPI_COMM_TYPE_HW_UNGUIDED.
# Add QMPI (experimental) support.
# Add MPIX_Delete_error_{class,code,string}.
# MPI_Info objects can be accessed before MPI_Init{_thread}.
# Generate C API interface functions including man page notes and error
checking using Python scripts.
# Generate Fortran mpi_f08 binding using Python scripts.
# Support explicit --without-cuda configure option.
# Drop support for UCX version < 1.7.0.
# Configure now optionally require Python 3 (when F08 is enabled).
# Multi-NIC support in ch4:ofi.
A full list of changes is available at the following link:
http://www.mpich.org/static/downloads/4.0a2/shortlog
