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<p class="MsoNormal">Hi Team,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am using MPICH 3.0.4.<o:p></o:p></p>
<p class="MsoNormal">My top level script invokes a ‘batch script’ in background and then runs my mpi-program using mpiexec.<o:p></o:p></p>
<p class="MsoNormal">I run this top-level script in background mode ( please check details later).<o:p></o:p></p>
<p class="MsoNormal">It seems once I invoke the mpiexec, my batch-script execution is suspended.<o:p></o:p></p>
<p class="MsoNormal">I tried OpenMPI and they do not have the issue.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have attached 3 files.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1><span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>run.sh : run script to run the top-level program<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2><span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>background.sh : invoked from run.sh as a background job. Just prints something on a while loop<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">3><span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>myprog.c : simple MPI program which just waits on a loop<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Compile step : mpicc myprog.c <span style="font-family:Wingdings">
à</span> a.out<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">#! /bin/bash<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">./background.sh &<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">mpiexec -n 1 ./a.out
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To reproduce : <o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-family:"Courier New"">Shell >> ./run.sh &<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Courier New"">Shell >> jobs<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Courier New"">[1] + Suspended (tty input) ./run.sh<o:p></o:p></span></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here the background.sh is suspended. However, a.out keeps running.<o:p></o:p></p>
<p class="MsoNormal">If I change the script so that mpiexec takes input from /dev/null, then the issue is resolved.<o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">#! /bin/bash<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">./background.sh &<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">mpiexec -n 1 ./a.out
<b>< /dev/null<o:p></o:p></b></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal">It seems to be a MPICH specific issue.<o:p></o:p></p>
<p class="MsoNormal">Could you please have a look and file a bug for this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Hirak<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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