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MPICH development call tomorrow
by Zhou, Hui 08 Oct '25

08 Oct '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * MPICH release plan * Remove MPIO_Request from ROMIO tests * MPI_Type_match_size using internal types * Collective selection framework * CH4 progress optimization * 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 24 Sep '25

24 Sep '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * V4.3.2 release candidate * Fix HCOLL support * Add UCC support * Fix build with NAG compiler * Fix ABI build * 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 18 Sep '25

18 Sep '25

Dear MPICH family and friends, Sorry for the late notice. We will have the MPICH development update call today at 9am CDT. agenda * 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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Re: [mpich-devel] MPICH in Debian/Linux
by Raffenetti, Ken 15 Sep '25

15 Sep '25

Hi Alastair, (1) mpi-fort.pc disappeared in recent releases. Is this a regression or is it expected to change? ie will there be more than mpich.pc for pkgconf in the future? To my knowledge we have never shipped this file. There has been an open issue asking for these (https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues/6845__;!… ). It seems to have fallen thru the cracks. Perhaps we can get this in the 5.0.0beta due out in November. (2) I would like to enable a build for both GPUs and non-GPU systems. Currently a GPU-enabled build will fail to run on a non-GPU machine unless an environment variable is set to override this. This is now resolved in the main branch and will be included in the 5.0.0beta. If desired, we can look at backporting to the 4.3.x branch for a bug-fix release. Ken From: Alastair McKinstry via devel <devel(a)mpich.org> Date: Monday, September 15, 2025 at 4:08 AM To: devel(a)mpich.org <devel(a)mpich.org> Cc: Alastair McKinstry <mckinstry(a)debian.org> Subject: [mpich-devel] MPICH in Debian/Linux This Message Is From an External Sender This message came from outside your organization. Hi I maintain mpich within Debian Linux (currently at version 4.3.1). I have two questions I am trying to find answers for: (1) mpi-fort.pc disappeared in recent releases. Is this a regression or is it expected to change? ie will there be more than mpich.pc for pkgconf in the future? (2) I would like to enable a build for both GPUs and non-GPU systems. Currently a GPU-enabled build will fail to run on a non-GPU machine unless an environment variable is set to override this. This is cumbersome for most uses. It would be preferable to have a default /etc config file setting behaviour. Is this possible? Best regards Alastair -- Alastair McKinstry, GPG: 82383CE9165B347C787081A2CBE6BB4E5D9AD3A5 e: mckinstry(a)debian.org, im: @alastair:mckinstry.ie https://urldefense.us/v3/__https://mastodon.ie/@amckinstry__;!!G_uCfscf7eWS…

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MPICH in Debian/Linux
by Alastair McKinstry 15 Sep '25

15 Sep '25

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

03 Sep '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * Fix support for 3rd party PMI library * Fix ZE init_device_mapping * Fix persistent bcast algorithm * Misc fixes for 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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Re: [mpich-devel] Update for the mpich website: https://www.mpich.org/downloads/
by Raffenetti, Ken 29 Aug '25

29 Aug '25

Hi Alastair, Thank you for your email. I have updated the MPICH website with the new package information. Cheers, Ken From: Alastair McKinstry via devel <devel(a)mpich.org> Date: Wednesday, August 27, 2025 at 6:45 AM To: devel(a)mpich.org <devel(a)mpich.org> Cc: Alastair McKinstry <mckinstry(a)debian.org> Subject: [mpich-devel] Update for the mpich website: https://urldefense.us/v3/__https://www.mpich.org/downloads/__;!!G_uCfscf7eW… This Message Is From an External Sender This message came from outside your organization. Hi, Apologies but I can't find a better destination for this email. I'm the current maintainer of mpich in Debian (Alastair McKinstry, mckinstry(a)debian.org) and the mpich website is out of date: The latest versions of mpich available in Debian are: unstable/forky: https://urldefense.us/v3/__https://packages.debian.org/unstable/mpich__;!!G… 4.3.1 trixie: https://urldefense.us/v3/__https://packages.debian.org/stable/mpich__;!!G_u… 4.2.1 bookworm: https://urldefense.us/v3/__https://packages.debian.org/oldstable/mpich__;!!… 4.2.1 bullseye: https://urldefense.us/v3/__https://packages.debian.org/oldoldstable/mpich__… 3.4.1 Best regards Alastair -- Alastair McKinstry, GPG: 82383CE9165B347C787081A2CBE6BB4E5D9AD3A5 e: mckinstry(a)debian.org, im: @alastair:mckinstry.ie https://urldefense.us/v3/__https://mastodon.ie/@amckinstry__;!!G_uCfscf7eWS…

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MPICH development call tomorrow
by Zhou, Hui 27 Aug '25

27 Aug '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * Completing the support for MPI ABI * RNDV pipeline/read/write protocols for ch4:ofi * Collective selection re-design * 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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Update for the mpich website: https://www.mpich.org/downloads/
by Alastair McKinstry 27 Aug '25

27 Aug '25

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MPICH development call tomorrow
by Zhou, Hui 20 Aug '25

20 Aug '25

Dear MPICH family and friends, The next MPICH development tele-con will be tomorrow (Thursday) at 9am US Central time. agenda * RFC: collective selection redesign * PMI interface runtime switch * Singleton init stdin issue * Update ucx submodule to v1.19.0 * Circulant graph bcast algorithm * 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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