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Hi Howard,
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<div class="">I’ll be there today.</div>
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<div class="">We need to figure out what our purpose is for the meeting on 24th April - or cancel our involvement. Martin added two for us so they existed but we don’t have to use the 2nd one if we have nothing new to present/ask/etc.</div>
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<div class="">Point of information: the "function pointers” group just decided today that explicit function pointers as part of the MPI user-facing interface, are not necessary for any of the use-cases for which they were proposed. Thus, we are likely not going
to get function pointers + sessions any time ever. This is not a bad thing because one of those driving use-cases for function pointers was sessions - we convinced ourselves that the function pointers needed for sessions, e.g. to support different thread support
levels, can be hidden behind the existing MPI functions and opaque handles. For example, the MPI_Request handle could lead to a function pointer for the actual “wait” function inside the MPI library and another for the actual “test” function. The MPI_WAIT
and MPI_TEST functions will then be implemented as straightforward delegation shim functions that call down into the appropriate function pointer from the passed-in MPI_Request parameter. We should socialise that proposed approach with Aurelien (in particular)
because he voted against sessions in the Chattanooga straw poll because of the perceived lack of support for multiple thread support levels in use at the same time.<br class="">
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Cheers,</div>
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Dan.</div>
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—<br class="">
Dr Daniel Holmes PhD<br class="">
Applications Consultant in HPC Research<br class="">
<a href="mailto:d.holmes@epcc.ed.ac.uk" class="">d.holmes@epcc.ed.ac.uk</a><br class="">
Phone: +44 (0) 131 651 3465<br class="">
Mobile: +44 (0) 7940 524 088<br class="">
Address: Room 2.09, Bayes Centre, 47 Potterrow, Central Area, Edinburgh, EH8 9BT</div>
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—</div>
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The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.</div>
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—</div>
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<div class="">On 22 Apr 2019, at 17:16, Pritchard Jr.,<span class="Apple-tab-span" style="white-space:pre">
</span>Howard via mpiwg-sessions <<a href="mailto:mpiwg-sessions@lists.mpi-forum.org" class="">mpiwg-sessions@lists.mpi-forum.org</a>> wrote:</div>
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<div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">
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<span style="font-size: 11pt;" class="">HI Sessions activists,<o:p class=""></o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class="">If possible, I’d like to meet today to discuss<o:p class=""></o:p></span></div>
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<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<a href="https://github.com/mpiwg-sessions/mpi-standard/pull/27" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">https://github.com/mpiwg-sessions/mpi-standard/pull/27</a><o:p class=""></o:p></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class="">and<o:p class=""></o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<a href="https://github.com/mpiwg-sessions/mpi-standard/pull/26" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">https://github.com/mpiwg-sessions/mpi-standard/pull/26</a><o:p class=""></o:p></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class="">as well as what to knock off next in<o:p class=""></o:p></span></div>
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<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<a href="https://github.com/mpiwg-sessions/sessions-issues/issues/10" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">https://github.com/mpiwg-sessions/sessions-issues/issues/10</a><o:p class=""></o:p></div>
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<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class="">Reminder we have an hour in the upcoming virtual forum on 4/24.<o:p class=""></o:p></span></div>
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<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-size: 11pt;" class="">Thanks,<o:p class=""></o:p></span></div>
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<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class="">Howard<o:p class=""></o:p></span></div>
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<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class="">-- <o:p class=""></o:p></span></div>
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<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10.5pt;" class="">Howard Pritchard<o:p class=""></o:p></span></div>
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<span style="font-size: 10.5pt;" class="">HPC-ENV<o:p class=""></o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10.5pt;" class="">Los Alamos National Laboratory<o:p class=""></o:p></span></div>
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<o:p class=""> </o:p></div>
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<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">mpiwg-sessions
mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<a href="mailto:mpiwg-sessions@lists.mpi-forum.org" style="color: rgb(149, 79, 114); text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">mpiwg-sessions@lists.mpi-forum.org</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<a href="https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions" style="color: rgb(149, 79, 114); text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions</a></div>
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