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<p class="MsoNormal"><span style="font-size:11.0pt">Hello MPI FTer’s,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The Sessions WG could use some help/suggestions about how to adjust the following advice to implementors that accompanies the definition of MPI_Abort:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="p1"><span class="s1">\begin</span><span class="s2">{implementors}</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s2">After aborting a subset of processes, a high quality implementation should</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s2">be able to provide error handling for communicators, windows, and files</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s2">involving both aborted and non-aborted processes. As an example, if the</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s2">user changes the error handler for
</span><span class="s1">\const</span><span class="s3">{</span><span class="s2">MPI</span><span class="s3">\_</span><span class="s2">COMM</span><span class="s3">\_</span><span class="s2">WORLD</span><span class="s3">}</span><span class="s2"> to</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s1">\const</span><span class="s3">{</span><span class="s2">MPI</span><span class="s3">\_</span><span class="s2">ERRORS</span><span class="s3">\_</span><span class="s2">RETURN</span><span class="s3">}</span><span class="s2">
or a custom error handler, when a subset of</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s1">\const</span><span class="s3">{</span><span class="s2">MPI</span><span class="s3">\_</span><span class="s2">COMM</span><span class="s3">\_</span><span class="s2">WORLD</span><span class="s3">}</span><span class="s2">
is aborted, the remaining processes in</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s1">\const</span><span class="s3">{</span><span class="s2">MPI</span><span class="s3">\_</span><span class="s2">COMM</span><span class="s3">\_</span><span class="s2">WORLD</span><span class="s3">}</span><span class="s2">
should be able to continue communicating with each</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s2">other and receive appropriate error codes when attempting communication</span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><span class="s2">with an aborted process.</span><o:p></o:p></p>
<p class="p1"><span class="s1">\end</span><span class="s2">{implementors}</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We would like to generalize this advice to implementors to the case where MPI_COMM_WORLD isn’t a valid communicator, i.e. when an application is using the Sessions model.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We think that there would need to be some reworking of the existing text to cover the sessions use case. Since the FT group has worked quite a bit on this text, we’d defer to your group for suggestions on
how to generalize this text to cover the sessions use case.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks very much for any help,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Howard<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">-- <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Howard Pritchard<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">HPC-ENV<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Los Alamos National Laboratory<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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