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MPICH development call tomorrow
by Zhou, Hui 07 Jan '26

07 Jan '26

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * MPICH 5.0.0rc1 released on 12/19/2025 * Improve check for AVX support * MPI attributes and Fortran binding * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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MPICH development call tomorrow
by Zhou, Hui 17 Dec '25

17 Dec '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * MPICH 5.0.0 release update * Ch4 RMA fallback path * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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MPICH development call tomorrow
by Zhou, Hui 10 Dec '25

10 Dec '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * Use larger av_tables size for spawn thread-safety * Fix win_shm_alloc_impl * Add library dependencies to RPATH * Avoid duplicating confdb and submodules * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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MPICH development call tomorrow
by Zhou, Hui 03 Dec '25

03 Dec '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * Show commit hash in DEBUG_SUMMARY * Improving ch4 progress throttle * Data races found by ThreadSanitizer * Issues with MPI_Comm_fromint etc. * Preparations for CSEL redesign * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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Join us for the MPICH BoF Wednesday evening at SC25
by Raffenetti, Ken 13 Nov '25

13 Nov '25

All, The MPICH team will host a Birds-of-a-Feather session Wednesday evening as part of the SC25 proceedings. We hope you will join us to discuss the latest MPICH developments and hear from the community. Date and Time: Wednesday, November 19th, 5:15pm - 6:45pm CST Location: 125 Agenda: * Welcome and ANL Update * Welcome – Ken Raffenetti * ANL Update – Yanfei Guo & Hui Zhou * Partner Presentations * Maria Garzaran, Intel * Nathaniel Shineman, MVAPICH * Simon Pickartz, ParTec AG * Naveen Ravi, HPE * Jeff Hammond, NVIDIA * Mike Wilkins, Cornelis Networks * User Presentations * Thomas Applencourt, ANL/ALCF * Q&A https://urldefense.us/v3/__https://sc25.conference-program.com/presentation… Cheers, The MPICH team

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MPICH development call tomorrow
by Zhou, Hui 12 Nov '25

12 Nov '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * Genq pool page alignment * CMA check ptrace_scope * Adding UCC collectives * CSEL redesign * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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MPICH development call tomorrow
by Zhou, Hui 05 Nov '25

05 Nov '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * MPICH v5.0.0b1 release plan * Enable CH4 CMA by default * Misc. fixes * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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MPICH development call tomorrow
by Zhou, Hui 29 Oct '25

29 Oct '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * Fix ch4 ofi pipeline issues * Enable CMA by default * Misc warnings fix * Noblocking contextid allocation using MPIX Async * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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MPICH development call tomorrow
by Zhou, Hui 22 Oct '25

22 Oct '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * Ch4 progress throttle at high PPN * Ch4 SHM performance tuning * Session psets support * Ch4 pipeline algorithm deadlock due to out-of cells * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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MPICH development call tomorrow
by Zhou, Hui 15 Oct '25

15 Oct '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * ch4/ofi: VCIs with scalable endpoints * ch3/rma: Fix noncontig accumulate * ch4/shm: Tune default cell size * datatype: Fix leaks of external types internally * Recently merged PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * Recently opened PRs<https://urldefense.us/v3/__https://github.com/pmodels/mpich/pulls?q=is*3Apr… > * New issues<https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues?q=is*3Ai… > To join the Meeting: https://urldefense.us/v3/__https://teams.microsoft.com/l/meetup-join/19*3am… If you would like a calendar invite, please send us a message. Thanks, -- Hui Zhou Principal Research Software Engineer Mathematics and Computer Science Argonne National Laboratory TEL: 630-252-3430

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