- announce - mailman3.cels.anl.gov

Upgrade on mailing list infrastructure
by Doukas, Barbara 24 Jun '26

24 Jun '26

Hi List Owners, We are excited to announce that we are upgrading our mailing list infrastructure from Mailman 2 to Mailman 3. This move brings a more modern interface, better security, and a much-improved user experience for both you and your subscribers. What’s New? Modern Web Interface: A sleek, mobile-friendly dashboard for managing settings and archives. Single Login: No more individual passwords for every list; you can now manage all your lists under one account. Using your Argonne password and accessible via one URL: https://mailman.cels.anl.gov <https://mailman.cels.anl.gov/ > Improved Archiving: Archives are now searchable, threaded, and much easier to navigate. Drafting & Moderation: A more intuitive workflow for approving held messages. The Migration Timeline We have scheduled the migration for your lists on Thursday June 25th at 12:00PM. Downtime: Expect a brief window of approximately three hours where list configuration changes will be disabled. Mail Delivery: We do not anticipate any interruptions to actual email delivery during this window. What You Need to Do? In most cases, your settings, memberships, and archives will migrate automatically. However, we recommend the following: Verify Access: After Thursday June 25th, log in at https://mailman.cels.anl.gov/your list’s name to ensure you see your lists. Check Archives: Confirm that your historical data has synced correctly. Update Links: If you have "Join our list" links on your own websites, please update them to point to the new Mailman 3 URL. Note: Your list addresses (e.g., list-name(a)domain.com<mailto:[email protected]>) will not change. If you have questions or encounter any issues during this transition, please reach out to the help desk at help(a)cels.anl.gov<mailto:[email protected]> The publicly available documentation on mailman 3 can be found under this link: https://urldefense.us/v3/__https://docs.mailman3.org/en/latest/userguide.ht… Best regards, Barb Doukas – CELS IT Technical Support Engineer Level 1 ARGONNE NATIONAL LABORATORY<https://www.anl.gov/ > 9700 South Cass Avenue; Building 240, Office 2.A.13 Lemont, IL 60439 P: 630-252-6525 bdoukas(a)anl.gov<mailto:[email protected]> [Image] Impact | Safety | Respect | Integrity | Teamwork -

1 0

Upgrade on mailing list infrastructure
by Doukas, Barbara 24 Jun '26

24 Jun '26

Hi List Owners, We are excited to announce that we are upgrading our mailing list infrastructure from Mailman 2 to Mailman 3. This move brings a more modern interface, better security, and a much-improved user experience for both you and your subscribers. What’s New? Modern Web Interface: A sleek, mobile-friendly dashboard for managing settings and archives. Single Login: No more individual passwords for every list; you can now manage all your lists under one account. Using your Argonne password and accessible via one URL: https://mailman.cels.anl.gov <https://mailman.cels.anl.gov/ > Improved Archiving: Archives are now searchable, threaded, and much easier to navigate. Drafting & Moderation: A more intuitive workflow for approving held messages. The Migration Timeline We have scheduled the migration for your lists on Thursday June 25th at 12:00PM. Downtime: Expect a brief window of approximately three hours where list configuration changes will be disabled. Mail Delivery: We do not anticipate any interruptions to actual email delivery during this window. What You Need to Do? In most cases, your settings, memberships, and archives will migrate automatically. However, we recommend the following: Verify Access: After Thursday June 25th, log in at https://mailman.cels.anl.gov/your list’s name to ensure you see your lists. Check Archives: Confirm that your historical data has synced correctly. Update Links: If you have "Join our list" links on your own websites, please update them to point to the new Mailman 3 URL. Note: Your list addresses (e.g., list-name(a)domain.com<mailto:[email protected]>) will not change. If you have questions or encounter any issues during this transition, please reach out to the help desk at help(a)cels.anl.gov<mailto:[email protected]> The publicly available documentation on mailman 3 can be found under this link: https://urldefense.us/v3/__https://docs.mailman3.org/en/latest/userguide.ht… Best regards, Barb Doukas – CELS IT Technical Support Engineer Level 1 ARGONNE NATIONAL LABORATORY<https://www.anl.gov/ > 9700 South Cass Avenue; Building 240, Office 2.A.13 Lemont, IL 60439 P: 630-252-6525 bdoukas(a)anl.gov<mailto:[email protected]> [Image] Impact | Safety | Respect | Integrity | Teamwork -

1 0

MPICH 5.0.1 released
by Raffenetti, Ken 10 Apr '26

10 Apr '26

A new stable release of MPICH, 5.0.1, is now available for download. This release addresses a number of user-reported issues. Thanks to all who contributed reports and fixes! For the full set of commits see https://urldefense.us/v3/__https://github.com/pmodels/mpich/compare/v5.0.0_… …v5.0.1/. You can find the release on our downloads page (https://urldefense.us/v3/__https://www.mpich.org/downloads/__;!!G_uCfscf7eW… ) Regards, The MPICH team =============================================================================== Changes in 5.0.1 =============================================================================== # Fix bad cast in release-gather collectives that caused data loss issues on Big-Endian 64b arches (s390x) # Fix issue with canceling MPI_ANY_SOURCE receive requests # Fix configuration issue when C++ compiler does not support complex types # Fix function signature issue in Hydra PBS support # Fix crash in MPI_Allreduce with MPI_LOGICAL type # Fix potential crash in multi-nic libfabric initialization # Fix memory leaks in Level Zero and PMIx support # Fix bug in CMA code when GPU support is enabled # Fix potential shared memory collision between multiple singleton processes on the same node # Add large count and other necessary aliases to ROMIO to avoid accidental profiling of internal MPI function usage # Add missing error checks in rndv and colletive composition code # Improve autogen.sh error message when autotools are too old

1 0

MPICH 5.0.1rc3 released
by Raffenetti, Ken 07 Apr '26

07 Apr '26

A new release candidate of MPICH, 5.0.1rc3, is now available for download. This release addresses a number of user-reported issues, including a potential corruption issue with multiple singleton inits on the same node. For the full set of commits see https://urldefense.us/v3/__https://github.com/pmodels/mpich/compare/v5.0.0_… …v5.0.1rc3/. You can find the release on our downloads page (https://urldefense.us/v3/__https://www.mpich.org/downloads/__;!!G_uCfscf7eW… ) Regards, The MPICH team =============================================================================== Changes in 5.0.1 =============================================================================== # Fix bad cast in release-gather collectives that caused data loss issues on Big-Endian 64b arches (s390x) # Fix issue with canceling MPI_ANY_SOURCE receive requests # Fix configuration issue when C++ compiler does not support complex types # Fix function signature issue in Hydra PBS support # Fix crash in MPI_Allreduce with MPI_LOGICAL type # Fix potential crash in multi-nic libfabric initialization # Fix memory leaks in Level Zero and PMIx support # Fix bug in CMA code when GPU support is enabled # Fix potential shared memory collision between multiple singleton processes on the same node # Add large count and other necessary aliases to ROMIO to avoid accidental profiling of internal MPI function usage # Add missing error checks in rndv and colletive composition code # Improve autogen.sh error message when autotools are too old

1 0

MPICH 5.0.1rc2 released
by Raffenetti, Ken 01 Apr '26

01 Apr '26

A new release candidate of MPICH, 5.0.1rc2, is now available for download. This release addresses several user-reported issues, including an accidental breakage of the standard ABI build (–enable-mpi-abi) present in 5.0.1rc1. For the full set of commits see https://urldefense.us/v3/__https://github.com/pmodels/mpich/compare/v5.0.0_… …v5.0.1rc2/. You can find the release on our downloads page (https://urldefense.us/v3/__https://www.mpich.org/downloads/__;!!G_uCfscf7eW… ) Regards, The MPICH team =============================================================================== Changes in 5.0.1 =============================================================================== # Fix bad cast in release-gather collectives that caused data loss issues on Big-Endian 64b arches (s390x) # Fix issue with canceling MPI_ANY_SOURCE receive requests # Fix configuration issue when C++ compiler does not support complex types # Fix function signature issue in Hydra PBS support # Fix crash in MPI_Allreduce with MPI_LOGICAL type # Fix potential crash in multi-nic libfabric initialization # Fix memory leaks in Level Zero and PMIx support # Fix bug in CMA code when GPU support is enabled # Add large count and other necessary aliases to ROMIO to avoid accidental profiling of internal MPI function usage # Add missing error checks in rndv and colletive composition code # Improve autogen.sh error message when autotools are too old

1 0

MPICH 5.0.1rc1 released
by Raffenetti, Ken 31 Mar '26

31 Mar '26

A new release candidate of MPICH, 5.0.1rc1, is now available for download. This release addresses several user-reported issues. For the full set of commits see https://urldefense.us/v3/__https://github.com/pmodels/mpich/compare/v5.0.0_… …v5.0.1rc1/. You can find the release on our downloads page (https://urldefense.us/v3/__https://www.mpich.org/downloads/__;!!G_uCfscf7eW… ) Regards, The MPICH team =============================================================================== Changes in 5.0.1 =============================================================================== # Fix bad cast in release-gather collectives that caused data loss issues on Big-Endian 64b arches (s390x) # Fix issue with canceling MPI_ANY_SOURCE receive requests # Fix configuration issue when C++ compiler does not support complex types # Fix function signature issue in Hydra PBS support # Fix crash in MPI_Allreduce with MPI_LOGICAL type # Fix potential crash in multi-nic libfabric initialization # Fix memory leaks in Level Zero and PMIx support # Fix bug in CMA code when GPU support is enabled # Add large count and other necessary aliases to ROMIO to avoid accidental profiling of internal MPI function usage # Add missing error checks in rndv and colletive composition code # Improve autogen.sh error message when autotools are too old

1 0

REMINDER: Join us Thursday, February 12th for an MPICH BoF as part of CASS Community BoF Days
by Raffenetti, Ken 12 Feb '26

12 Feb '26

Reminder that the MPICH BoF starts in about 30 minutes! There is still time to register and attend. Updated schedule below. Date and Time: Thursday, February 12th, 10:00am – 11:30am Central Time Registration: https://urldefense.us/v3/__https://www.zoomgov.com/meeting/register/EQumnsm… Agenda: * ANL Update – Hui Zhou * Partner Updates * Kim McMahon, Hewlett Packard Enterprise * Nat Shineman, Ohio State University * Simon Pickartz, ParTec AG * Gengbin Zheng, Intel * User Presentations * Nathan Nichols, ANL/ALCF * Junchao Zhang, ANL/PETSc * Q&A Cheers, The MPICH team

1 0

Join us Thursday, February 12th for an MPICH BoF as part of CASS Community BoF Days
by Raffenetti, Ken 09 Feb '26

09 Feb '26

All, The MPICH team will host a Birds-of-a-Feather session this Thursday, February 12th at 10am Central time as part of the CASS Community BoF Days https://urldefense.us/v3/__https://cass.community/news/2026-02-10-cass-bof-… . We hope to see folks there to discuss upcoming MPICH release plans and to hear presentations from MPICH partners and users. Date and Time: Thursday, February 12th, 10:00am – 11:30am Central Time Registration: https://urldefense.us/v3/__https://www.zoomgov.com/meeting/register/EQumnsm… Agenda: * ANL Update – Hui Zhou * Partner Updates * Kim McMahon, Hewlett Packard Enterprise * Nat Shineman, Ohio State University * Simon Pickartz, ParTec AG * Maria Garzaran, Intel * User Presentations * Thomas Applencourt, ANL/ALCF * Junchao Zhang, ANL/PETSc * Q&A Cheers, The MPICH team

1 0

MPICH 5.0.0 Released!
by Zhou, Hui 04 Feb '26

04 Feb '26

We are happy to announce the release of MPICH version 5.0.0. This is the first stable release for the 5.0.x series. MPICH 5.0.0 contains the full support for the MPI-5 standard including the new MPI ABI specification. In addition, this release contains more robust support for MPI applications that require more dynamism via MPI sessions. Full change log attached below. Please checkout at https://urldefense.us/v3/__https://www.mpich.org/downloads/__;!!G_uCfscf7eW… and enjoy! Cheers! The MPICH Team =============================================================================== Changes in 5.0.0 =============================================================================== # MPI_VERSION/MPI_SUBVERSION updated to 5 and 0. MPICH now supports the MPI 5.0 standard. # MPIR_CHKLMEM_ and MPIR_CHKPMEM_ macros are simplified, removing non-essential argument such as type case and custom error messages. # Rename MPIR_CVAR_DEBUG_PROGRESS_TIMEOUT to MPIR_CVAR_PROGRESS_TIMEOUT, and enable it whether or not --enable-g=progress is used in configure. # MPICH now generates the MPI-IO bindings when ROMIO is build inside MPICH. It remains the same for using ROMIO outside MPICH. # Yaksa is now maintained inside MPICH rather than as an external submodule. # Added internal builtin datatypes and external builtin datatypes are mapped to internal types. For example, both MPI_INT and MPI_INT32_T are mapped to internal type MPIR_INT32. NOTE: direct usage of external MPI types are disallowed in MPICH internally. For example, use MPIR_INT_INTERNAL to replace direct usage of MPI_INT. Commonly used types include MPI_BYTE, MPI_CHAR, MPI_AINT, use MPIR_BYTE_INTERNAL, MPIR_CHAR_INTERNAL, MPIR_AINT_INTERNAL instead. There is no impact to users. # Removed MPIR_Find_{local,external}. Added in MPIR_Comm struct with attr and hierarchical fields to more efficiently query communicator's hierarchical structure. # Use MPIR_Comm_get_{node,node_roots}_comm to obtain node_comm and node_roots_comm. This provides the mechanism to create subcomms on demand. In general, use MPIR_Subcomm_create to create subcomms. Subcomms are marked by MPIR_COMM_ATTR__SUBCOMM bit in the attr field. They can be much more lightweight than user-visible communicators. # ADI: MPID_Comm_get_lpid removed. Lpids are looked up from the local_group and remote_group in the MPIR_Comm struct. # ADI: MPID_Intercomm_exchange_map renamed to MPID_Intercomm_exchange and parameters now include tag, context_id, and will perform context_id exchange and lpid exchange. # Added MPI_LOGICAL1, MPI_LOGICAL2, MPI_LOGICAL4, MPI_LOGICAL8, and MPI_LOGICAL16. # Added MPIX_BFLOAT16, and added software reduction support for MPIX_BFLOAT16 and MPIX_C_FLOAT16. # Reworked AVX and AVX512 support. By default, MPICH will use runtime check to detect if AVX or AVX512 is supported. If supported, MPICH will internally use AVX and AVX512 for inter-NUMA and Intel GPU device memory copy operations. The --enable-fast=avx and --enable-fast=avx512f options now does two things: 1) skips the runtime check and force enables AVX and AVX512; 2) enables the usage of AVX and AVX512 to build the entire libmpi.so (instead of selected memory copy operations). A new summary in ./configure will report info on these usages. # PMI 2 is now deprecated. Please consider switching to PMI 1. # PMI 2 thread support is removed. # PMI 1 upgraded to PMI 1.2, adding new API PMI_Barrier_group. PMI_Barrier_group support KVS exchange and barrier over a group of processes rather than the world. Usage in multiple threads is supported. # MPI_Session_init default to MPI_THREAD_MULTIPLE. Thread levels are global. The first MPI_Session_init, MPI_Init, or MPI_Init_thread sets the thread level; the later init will ignore users request and inherit the global thread level. # Internal collective interface replaces the last parameter "MPIR_Errflag_t errflag" with "int coll_attr". Use MPIR_COLL_ATTR_SYNC for internal collective usages where completing the synchronization is more critical than batch latency. # CH4:OFI added native RNDV feature. Set MPIR_CVAR_CH4_OFI_EAGER_THRESHOLD to enable the RNDV path. The RNDV path supports the following protocols: pipeline, read, write, and direct.

1 0

MPICH-5.0.0rc3 released
by Zhou, Hui 23 Jan '26

23 Jan '26

We announce the availability of MPICH version 5.0.0rc3. Compared to the 5.0.0rc2 release, this release contains a fix for potential build issues with older ROCm versions. The release tarball is available in the MPICH download area. We encourage users to test this release and report any issues. Thank you for your continued support. The MPICH Team

1 0