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Announcing the availability of MPICH 4.0rc3
by Raffenetti, Ken 12 Jan '22

12 Jan '22

A new release candidate of MPICH, 4.0rc3, is now available for download. This is the third release candidate in the 4.0 series, and contains critical fixes found during the RC period. Note that we did not announce the 4.0rc2 release, since a high priority bug was discovered shortly after it was tagged. At this stage, only critical bugs will be fixed before the 4.0 GA release. Please give it a try! You can find the release on our downloads page (https://www.mpich.org/downloads/) Regards, The MPICH team =============================================================================== Changes in 4.0 =============================================================================== # 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 (mpif.h, mpi_f08) bindings using Python scripts. # Generate collective entrance functions and generate per-algorithm tests. # 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. # Default to ch4:ofi when configure doesn't have a clear choice. Add message block at the end of configure to advise user. # Multiple VCI is fully implemented including the active message fallback paths. # Extend IPC to support non-contig datatypes. # Add AMD GPU support using HIP. # Add generic RNDV callback mechanism with active messages. # Refactor ch4 dynamic process functions. # Avoid building MPL and hwloc multiple times. # Fix MPIX_Query_cuda_support. # Many bug fixes and code clean-ups. A full list of changes is available at the following link: http://www.mpich.org/static/downloads/4.0rc1/shortlog

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Announcing the availability of MPICH 4.0rc1
by Raffenetti, Ken 22 Dec '21

22 Dec '21

A new release candidate of MPICH, 4.0rc1, is now available for download. This is the first release candidate in the 4.0 series. This release is feature complete and includes support for all new MPI-4.0 APIs. At this stage, only critical bugs will be fixed before the 4.0 GA release. Please give it a try! You can find the release on our downloads page (https://www.mpich.org/downloads/) Regards, The MPICH team =============================================================================== Changes in 4.0 =============================================================================== # 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 (mpif.h, mpi_f08) bindings using Python scripts. # Generate collective entrance functions and generate per-algorithm tests. # 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. # Default to ch4:ofi when configure doesn't have a clear choice. Add message block at the end of configure to advise user. # Multiple VCI is fully implemented including the active message fallback paths. # Extend IPC to support non-contig datatypes. # Add AMD GPU support using HIP. # Add generic RNDV callback mechanism with active messages. # Refactor ch4 dynamic process functions. # Avoid building MPL and hwloc multiple times. # Fix MPIX_Query_cuda_support. # Many bug fixes and code clean-ups. A full list of changes is available at the following link: http://www.mpich.org/static/downloads/4.0rc1/shortlog

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Announcing the availability of MPICH 3.4.3
by Raffenetti, Ken 16 Dec '21

16 Dec '21

A new stable release of MPICH, 3.4.3, is now available for download. This is the third bug-fix release in the 3.4.x series. This release contains improvements and fixes for Hydra, GPU support, ROMIO, datatypes, and other user-reported bugs and build issues. 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 3.4.3 =============================================================================== # Fix bugs in GPFS ROMIO driver # Fix bugs in DAOS ROMIO driver # Fix nemesis shm bug on systems with weak memory consistency # Fix progress issue in ch4:ucx finalize # Fix nonblocking collective issue during finalize # Fix UBSan warnings in 32-bit builds # Fix predefined datatype handle leaks # Fix bug in topology-aware communicator creation # Fix Slurm nodelist parsing # Fix testcase for out-of-tree configuration # Fix truncation testcase for possible disconnection error # Hydra help message improvements # Add support for DAOS pool and container labels A full list of changes is available at the following link: https://github.com/pmodels/mpich/compare/v3.4.2…v3.4.3

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Slides from SC21 MPICH BoF posted
by Raffenetti, Ken 30 Nov '21

30 Nov '21

Hi all, Slides from the SC21 MPICH BoF have been posted to the MPICH Github wiki. https://github.com/pmodels/mpich/wiki/2021-Supercomputing-BoF#presentations Additionally, the session recording is available to SC21 attendees via the Hubb platform for a limited time. https://sc21.hubb.me/fe/schedule-builder/sessions/879718 Once again, thanks to all the presenters and the MPICH community for participating! Cheers, The MPICH team

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Join the MPICH BoF this evening at SC21
by Raffenetti, Ken 17 Nov '21

17 Nov '21

All, A reminder that the MPICH team will host a virtual Birds-of-a-Feather session tonight at 5:15pm CST as part of the SC21 proceedings. We hope to see you there to discuss the latest developments in MPICH, and to hear from partners Intel, HPE, ParTec, MVAPICH, and Cornelis Networks. See the link below for join info! https://sc21.hubb.me/fe/schedule-builder/sessions/879718 Cheers, The MPICH team

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Announcing the availability of MPICH 4.0b1
by Raffenetti, Ken 15 Nov '21

15 Nov '21

A new beta release of MPICH, 4.0b1, is now available for download. This is the first beta release in the 4.0 series. This release is feature complete and includes support for all new MPI-4.0 APIs. You can find the release on our downloads page (https://www.mpich.org/downloads/) Regards, The MPICH team =============================================================================== Changes in 4.0 =============================================================================== # 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/4.0b1/shortlog

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Join the MPICH team at SC21
by Raffenetti, Ken 11 Nov '21

11 Nov '21

The MPICH team will participate is several sessions at next week's SC21 conference. We hope you can join us! A FACT-Based Approach: Making ML Collective Autotuning Feasible on Exascale Systems ExaMPI Workshop Paper Presentation Sunday, 14 November 2021 2:30pm - 3pm CST https://sc21.supercomputing.org/presentation/?id=ws_exampi101&sess=sess430 Advanced MPI Programming Tutorial Monday, 15 November 20218am - 5pm CST https://sc21.supercomputing.org/presentation/?id=tut120&sess=sess204 Parallel I/O In Practice Tutorial Monday, 15 November 2021 8am - 5pm CST https://sc21.supercomputing.org/?post_type=page&p=3480&sess=sess203 UCX: Unified Communication X Community Birds of a Feather Tuesday, 16 November 2021 5:15pm - 6:45pm CST https://sc21.supercomputing.org/presentation/?id=bof107&sess=sess355 Runtime Systems for Zettascale Panel Wednesday, 17 November 2021 10:30am - 12pm CST https://sc21.supercomputing.org/presentation/?sess=sess228&id=pan116#038;id… Pilgrim: Scalable and (Near) Lossless MPI Tracing Paper Presentation Wednesday, 17 November 20211:30pm - 2pm CST https://sc21.supercomputing.org/presentation/?sess=sess147&id=pap177#038;id… MPICH: A High Performance Open-Source MPI Implementation Birds of a Feather Wednesday, 17 November 20215:15pm - 6:45pm CST https://sc21.supercomputing.org/presentation/?sess=sess354&id=bof105#038;id…

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MPICH 4.0a2 Released
by Zhou, Hui 11 Jun '21

11 Jun '21

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 =============================================================================== Changes in 4.0 =============================================================================== # 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

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Announcing the availability of MPICH 3.4.2
by Raffenetti, Kenneth J. 28 May '21

28 May '21

A new stable release of MPICH, 3.4.2, is now available for download. This is the second bug-fix release in the 3.4.x series. This release contains fixes for GPU support and other user-reported bugs and build issues. 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 3.4.2 =============================================================================== # Update configure options to support --disable-ze and --disable-cuda to explicitly disable GPU-awareness # Update embedded hwloc to version 2.4.1. Fixes a build issue on systems with OpenCL. # Fixes for Argobots thread package support. # Fixes for the DAOS ROMIO driver (thanks to Intel for contributing) # Fix additional bugs in GPU-aware nonblocking op collectives # Fix 'make check' errors with embedded MPL and json-c libraries # Fix support for GNI provider in ch4:ofi netmod # Fix bug in dynamic window memory registration with ch4:ofi netmod # Fix bug in persistent pt2pt when used with MPI_PROC_NULL # Fix bug in hydra nameserver when freeing published entries # Fix bugs in GPFS ROMIO driver (thanks to IBM for contributing) # Fix bug in darray type creation (thanks to IBM for contributing) # Fix bugs in XPMEM support # Fix bug in MPI_Comm_spawn_multiple where non-root args were not ignored A full list of changes is available at the following link: https://github.com/pmodels/mpich/compare/v3.4.1…v3.4.2

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Announcing the availability of MPICH 4.0a1
by Zhou, Hui 26 Feb '21

26 Feb '21

A new alpha release of MPICH, 4.0a1, is now available for download. This is the first alpha release in the 4.0 series. This release adds implementations of many new APIs in the coming MPI 4.0 specification. Because the official MPI 4.0 specification is still in draft status, all the new API functions and symbols are implemented using MPIX prefix. 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 =============================================================================== Changes in 4.0a1 =============================================================================== # Implemented basic MPI-4 session API using MPIX interface. # Implemented basic MPI-4 partitioned communication API using MPIX interface. # Implemented MPI-4 large-count API using MPIX interface. # Implemented MPI-4 Tool events API using MPIX_T interface. # Implemented MPI-4 persistent bcast -- MPIX_Bcast_init. # Implemented MPIX_Isendrecv and MPIX_Isendrecv_replace. # Implemented MPIX_Comm_idup_with_info. # Implemented MPIX_Delete_error_{class,code,string}. # Implemented MPIX_Info_get_string. # MPI_Info objects can be accessed before MPI_Init{_thread}. # Support explict --without-cuda configure option.

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