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<div>Hi Aurelien,</div>
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<div>responses interleaved below:</div>
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<div>Howard Pritchard</div>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 11pt;">Office 9, 2<sup>nd</sup> floor Research Park<o:p></o:p></p>
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<div>Los Alamos National Laboratory</div>
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<span style="font-weight:bold">From: </span>mpiwg-sessions <<a href="mailto:mpiwg-sessions-bounces@lists.mpi-forum.org">mpiwg-sessions-bounces@lists.mpi-forum.org</a>> on behalf of Aurelien Bouteiller <<a href="mailto:bouteill@icl.utk.edu">bouteill@icl.utk.edu</a>><br>
<span style="font-weight:bold">Reply-To: </span>MPI Sessions working group <<a href="mailto:mpiwg-sessions@lists.mpi-forum.org">mpiwg-sessions@lists.mpi-forum.org</a>><br>
<span style="font-weight:bold">Date: </span>Tuesday, August 21, 2018 at 7:41 AM<br>
<span style="font-weight:bold">To: </span>MPI Sessions working group <<a href="mailto:mpiwg-sessions@lists.mpi-forum.org">mpiwg-sessions@lists.mpi-forum.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [mpiwg-sessions] question about section 8.3 and MPI_COMM_SELF<br>
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Howard,
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<div class="">A similar issue has been discussed during the last virtual meeting about what happens to errors in MPI_INIT (in which it is not guaranteed that MPI_COMM_SELF) is completely initialized yet, and error handlers had no chance to be set by users yet). </div>
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<div class="">One of the feedback of the call is that in such cases, returning an error code is a desired outcome. That would particularly apply to session_init. </div>
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<div>I like this idea! I’ll put some text into 8.3 stating this behavior when using the Peer to Peer model for initialization.</div>
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<div class="">For the rest of the session operations, it could be beneficial to be able to set explicitly (i.e. with a session api call) what is the default/fallback error handler for when the MPI_COMM_SELF object has not been created, and the rules for precedence
between these mechanisms when both are in play. I do not remember the group discussing these issues in much more details.</div>
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<div>Agreed. We need to come up with some way to deal with the way MPI_COMM_SELF is used currently as a grab bag of things.</div>
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<div class="">Best, </div>
<div class="">Aurelien </div>
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<div class="">On Aug 20, 2018, at 14:20, Pritchard Jr., Howard <<a href="mailto:howardp@lanl.gov" class="">howardp@lanl.gov</a>> wrote:</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;" class="">Hi Folks,</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;" class="">Does anyone in the WG recall what our thoughts were concerning</div>
<div style="font-size: 14px; font-family: Calibri, sans-serif;" class="">the case when MPI encounters an error in an MPI function</div>
<div style="font-size: 14px; font-family: Calibri, sans-serif;" class="">not associated with a particular communicator, file, window, or</div>
<div style="font-size: 14px; font-family: Calibri, sans-serif;" class="">(now) session?</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;" class="">I’m concerned about this sentence in 8.3:</div>
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When using the MPI calls that are not related to any objects are considered to be attached to the communicator</div>
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MPI_COMM_SELF<span style="font-size: 11px; line-height: normal;" class="">.</span></div>
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<div style="margin: 0px; line-height: normal;" class=""><span style="line-height: normal;" class=""><font face="Calibri" class="">Looking at the old power point slide deck, this problem is mentioned, but not</font></span></div>
<div style="margin: 0px; line-height: normal;" class=""><span style="line-height: normal;" class=""><font face="Calibri" class="">addressed.</font></span></div>
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<div style="margin: 0px; line-height: normal;" class=""><span style="line-height: normal;" class=""><font face="Calibri" class="">Howard</font></span></div>
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<span style="font-family: Calibri, sans-serif; font-size: 14px;" class="">-- </span></div>
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<div class="">Howard Pritchard</div>
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<div class="">B Schedule</div>
<div class="">HPC-ENV</div>
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<div style="margin: 0in 0in 0.0001pt; font-size: 11pt;" class="">Office 9, 2<sup class="">nd</sup> floor Research Park<o:p class=""></o:p></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 11pt;" class="">TA-03, Building 4200, Room 203</div>
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<div class="">Los Alamos National Laboratory</div>
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