August 2018 - mpiwg-sessions - mailman3.cels.anl.gov

Re: [mpiwg-sessions] Next meeting - *Tuesday* next week - midday Eastern US time
by HOLMES Daniel 08 Aug '18

08 Aug '18

Hi Ralph, I was nodding whilst reading, until I got to PMIX_GROUP_LEAVE_REQUEST (Destruct procedure, PMIx_Groups). There are situations where a process will leave without the luxury of requesting and being patient first, e.g. faults (handled as termination, I know, bear with me a moment). If this event was instead PMIX_GROUP_LEFT, then processes would be written to be able to cope with sudden exits in other processes. They have to be written like that anyway because of PMIX_GROUP_NOTIFY_TERMINATION. This event simply distinguishes "the process called PMIx_GROUP_LEAVE" from "the RM figured out a process stopped executing (normally or abnormally)”. Is such a distinction useful? In terms of outstanding/in-progress collective operations, just state that calling PMIX_GROUP_LEAVE is not allowed unless no such operations are in flight. The potential race between a process calling PMIX_GROUP_LEAVE and other process(es) in the group starting a collective operation should not happen in a well-defined program. Also, if PMIX_GROUP_NOTIFY_TERMINATION can state "collective operations will be adjusted appropriately" then why can’t PMIX_GROUP_LEAVE say that too? — For PMIX_GROUP_JOIN, can the leader process give up creation of the group and somehow tell PMIX to stop trying? If so, then processes that accepted a join request should be informed that the group is never going to be constructed, i.e. they should stop waiting for the callback/return of the blocking function. Thus, "once the group has been completely constructed” could be tempered with “or the group construction fails”. Cheers, Dan. — Dr Daniel Holmes PhD Applications Consultant in HPC Research d.holmes(a)epcc.ed.ac.uk<mailto:[email protected]> Phone: +44 (0) 131 651 3465 Mobile: +44 (0) 7940 524 088 Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. — On 8 Aug 2018, at 23:04, Ralph H Castain <rhc(a)open-mpi.org<mailto:[email protected]>> wrote: Hi folks I have updated the PMIx Group web page to capture the discussion of the prior meeting plus some subsequent thoughts: https://pmix.org/pmix-standard/pmix-groups/ I’ll try to put some initial implementation behind it before the meeting, so please feel free to chime up with any thoughts. Ralph On Aug 6, 2018, at 11:38 AM, Ralph H Castain <rhc(a)open-mpi.org<mailto:[email protected]>> wrote: Looks like I can free some time up this week for groups - will try to update later this week Sent from my iPhone On Aug 6, 2018, at 11:05 AM, HOLMES Daniel <d.holmes(a)epcc.ed.ac.uk<mailto:[email protected]>> wrote:to Hi all, The next meeting for the Sessions WG will be *Tuesday 14th Aug 2018* at 12pm Eastern US time. Note the change of day and time. This is a one-off change due to vacation time. The connection details for the call will be sent out on this list nearer the time. Cheers, Dan. — Dr Daniel Holmes PhD Applications Consultant in HPC Research d.holmes(a)epcc.ed.ac.uk<mailto:[email protected]> Phone: +44 (0) 131 651 3465 Mobile: +44 (0) 7940 524 088 Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. _______________________________________________ mpiwg-sessions mailing list mpiwg-sessions(a)lists.mpi-forum.org<mailto:[email protected]> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions _______________________________________________ mpiwg-sessions mailing list mpiwg-sessions(a)lists.mpi-forum.org<mailto:[email protected]> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

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Re: [mpiwg-sessions] Next meeting - *Tuesday* next week - midday Eastern US time
by Ralph H Castain 08 Aug '18

08 Aug '18

Hi folks I have updated the PMIx Group web page to capture the discussion of the prior meeting plus some subsequent thoughts: https://pmix.org/pmix-standard/pmix-groups/ <https://pmix.org/pmix-standard/pmix-groups/> I’ll try to put some initial implementation behind it before the meeting, so please feel free to chime up with any thoughts. Ralph > On Aug 6, 2018, at 11:38 AM, Ralph H Castain <rhc(a)open-mpi.org> wrote: > > Looks like I can free some time up this week for groups - will try to update later this week > > Sent from my iPhone > > On Aug 6, 2018, at 11:05 AM, HOLMES Daniel <d.holmes(a)epcc.ed.ac.uk <mailto:[email protected]>> wrote:to > >> Hi all, >> >> The next meeting for the Sessions WG will be *Tuesday 14th Aug 2018* at 12pm Eastern US time. >> >> Note the change of day and time. This is a one-off change due to vacation time. >> >> The connection details for the call will be sent out on this list nearer the time. >> >> Cheers, >> Dan. >> — >> Dr Daniel Holmes PhD >> Applications Consultant in HPC Research >> d.holmes(a)epcc.ed.ac.uk <mailto:[email protected]> >> Phone: +44 (0) 131 651 3465 >> Mobile: +44 (0) 7940 524 088 >> Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD >> — >> The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. >> — >> >> The University of Edinburgh is a charitable body, registered in >> Scotland, with registration number SC005336. >> _______________________________________________ >> mpiwg-sessions mailing list >> mpiwg-sessions(a)lists.mpi-forum.org <mailto:[email protected]> >> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions <https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions>

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Re: [mpiwg-sessions] Dan's sessions example moved to github
by Pritchard Jr., Howard 06 Aug '18

06 Aug '18

sorry meant “working on” not “moving on" -- Howard Pritchard B Schedule HPC-ENV Office 9, 2nd floor Research Park TA-03, Building 4200, Room 203 Los Alamos National Laboratory From: mpiwg-sessions <mpiwg-sessions-bounces(a)lists.mpi-forum.org<mailto:[email protected]>> on behalf of Howard Pritchard <howardp(a)lanl.gov<mailto:[email protected]>> Reply-To: MPI Sessions working group <mpiwg-sessions(a)lists.mpi-forum.org<mailto:[email protected]>> Date: Monday, August 6, 2018 at 4:11 PM To: MPI Sessions working group <mpiwg-sessions(a)lists.mpi-forum.org<mailto:[email protected]>> Subject: [mpiwg-sessions] Dan's sessions example moved to github Hi Folks, Due to constraints with free accounts on bitbucket, the sessions example code Dan started and that we are moving on is now at https://github.com/hpc/mpi_sessions_code_sandbox This is a private repo. If you’d like access let me know and I’ll add you. Howard -- Howard Pritchard B Schedule HPC-ENV Office 9, 2nd floor Research Park TA-03, Building 4200, Room 203 Los Alamos National Laboratory

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Dan's sessions example moved to github
by Pritchard Jr., Howard 06 Aug '18

06 Aug '18

Hi Folks, Due to constraints with free accounts on bitbucket, the sessions example code Dan started and that we are moving on is now at https://github.com/hpc/mpi_sessions_code_sandbox This is a private repo. If you’d like access let me know and I’ll add you. Howard -- Howard Pritchard B Schedule HPC-ENV Office 9, 2nd floor Research Park TA-03, Building 4200, Room 203 Los Alamos National Laboratory

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Webex meeting invitation: off cadence MPI Sessions webex
by Howard Pritchard 06 Aug '18

06 Aug '18

Hello, Howard Pritchard invites you to join this Webex meeting. off cadence MPI Sessions webex Tuesday, August 14, 2018 10:00 am | Mountain Daylight Time (Denver, GMT-06:00) | 1 hr Meeting number (access code): 804 502 074 Add to Calendar https://lanl-us.webex.com/lanl-us/j.php?MTID=mefd643991b350eb36f20ae856d963… When it's time, join the meeting. https://lanl-us.webex.com/lanl-us/j.php?MTID=mcb9f67db4bbf13516719db5ba86cd… JOIN BY PHONE +1-415-655-0002 US Toll Global call-in numbers: https://lanl-us.webex.com/lanl-us/globalcallin.php?serviceType=MC&ED=713824… Can't join the meeting? https://collaborationhelp.cisco.com/article/WBX000029055 IMPORTANT NOTICE: Please note that this Webex service allows audio and other information sent during the session to be recorded, which may be discoverable in a legal matter. By joining this session, you automatically consent to such recordings. If you do not consent to being recorded, discuss your concerns with the host or do not join the session.

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Re: [mpiwg-sessions] Next meeting - *Tuesday* next week - midday Eastern US time
by Ralph H Castain 06 Aug '18

06 Aug '18

Looks like I can free some time up this week for groups - will try to update later this week Sent from my iPhone > On Aug 6, 2018, at 11:05 AM, HOLMES Daniel <d.holmes(a)epcc.ed.ac.uk> wrote:to > > Hi all, > > The next meeting for the Sessions WG will be *Tuesday 14th Aug 2018* at 12pm Eastern US time. > > Note the change of day and time. This is a one-off change due to vacation time. > > The connection details for the call will be sent out on this list nearer the time. > > Cheers, > Dan. > — > Dr Daniel Holmes PhD > Applications Consultant in HPC Research > d.holmes(a)epcc.ed.ac.uk > Phone: +44 (0) 131 651 3465 > Mobile: +44 (0) 7940 524 088 > Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD > — > The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. > — > > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > _______________________________________________ > mpiwg-sessions mailing list > mpiwg-sessions(a)lists.mpi-forum.org > https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions

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Next meeting - *Tuesday* next week - midday Eastern US time
by HOLMES Daniel 06 Aug '18

06 Aug '18

Hi all, The next meeting for the Sessions WG will be *Tuesday 14th Aug 2018* at 12pm Eastern US time. Note the change of day and time. This is a one-off change due to vacation time. The connection details for the call will be sent out on this list nearer the time. Cheers, Dan. — Dr Daniel Holmes PhD Applications Consultant in HPC Research d.holmes(a)epcc.ed.ac.uk<mailto:[email protected]> Phone: +44 (0) 131 651 3465 Mobile: +44 (0) 7940 524 088 Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

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Re: [mpiwg-sessions] Next meeting - today - 1pm Eastern US time
by Pritchard Jr., Howard 06 Aug '18

06 Aug '18

HI Dan, Well looks like Atlasssian is getting really cheap and turned off my ability to share the bitbucket repo for write access. Time to move to a private repo on github? Note we hit turbulence with the tri-labs project because someone didn’t pay the bill – this was several months ago – but that’s been fixed at least for now. Let’s discuss at the call. Howard -- Howard Pritchard B Schedule HPC-ENV Office 9, 2nd floor Research Park TA-03, Building 4200, Room 203 Los Alamos National Laboratory From: mpiwg-sessions <mpiwg-sessions-bounces(a)lists.mpi-forum.org<mailto:[email protected]>> on behalf of HOLMES Daniel <d.holmes(a)epcc.ed.ac.uk<mailto:[email protected]>> Reply-To: MPI Sessions working group <mpiwg-sessions(a)lists.mpi-forum.org<mailto:[email protected]>> Date: Monday, August 6, 2018 at 5:44 AM To: MPI Sessions working group <mpiwg-sessions(a)lists.mpi-forum.org<mailto:[email protected]>> Subject: [mpiwg-sessions] Next meeting - today - 1pm Eastern US time Hi all, The next meeting for the Sessions WG is today at 1pm Eastern US time. The connection details for the call can be found here: http://mpi-forum.epcc.ed.ac.uk/mpiwg-sessions.php The wiki for the working group, including documentation about Sessions and minutes of previous meetings is here: https://github.com/mpiwg-sessions/sessions-issues/wiki We have two current topics. 1) Changes for the main part of the core sessions proposal https://github.com/mpiwg-sessions/mpi-standard/pull/8 2) Implementation of Sessions a) As a library on top of MPI-3.1 using connect/accept https://bitbucket.org/howard_pritchard/mpi_sessions_code_sandbox<https://bitbucket.org/howard_pritchard/mpi_sessions_code_sandbox/commits/all> b) Directly on top of PMIx, using PMIx groups https://github.com/pmix/RFCs/pull/33/files https://pmix.org/pmix-standard/pmix-groups/ Cheers, Dan. — Dr Daniel Holmes PhD Applications Consultant in HPC Research d.holmes(a)epcc.ed.ac.uk<mailto:[email protected]> Phone: +44 (0) 131 651 3465 Mobile: +44 (0) 7940 524 088 Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. —

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Next meeting - today - 1pm Eastern US time
by HOLMES Daniel 06 Aug '18

06 Aug '18

Hi all, The next meeting for the Sessions WG is today at 1pm Eastern US time. The connection details for the call can be found here: http://mpi-forum.epcc.ed.ac.uk/mpiwg-sessions.php The wiki for the working group, including documentation about Sessions and minutes of previous meetings is here: https://github.com/mpiwg-sessions/sessions-issues/wiki We have two current topics. 1) Changes for the main part of the core sessions proposal https://github.com/mpiwg-sessions/mpi-standard/pull/8 2) Implementation of Sessions a) As a library on top of MPI-3.1 using connect/accept https://bitbucket.org/howard_pritchard/mpi_sessions_code_sandbox<https://bitbucket.org/howard_pritchard/mpi_sessions_code_sandbox/commits/all> b) Directly on top of PMIx, using PMIx groups https://github.com/pmix/RFCs/pull/33/files https://pmix.org/pmix-standard/pmix-groups/ Cheers, Dan. — Dr Daniel Holmes PhD Applications Consultant in HPC Research d.holmes(a)epcc.ed.ac.uk<mailto:[email protected]> Phone: +44 (0) 131 651 3465 Mobile: +44 (0) 7940 524 088 Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

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