<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Hello everyone,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">New user of PETSc and trying to get familiar with it for parallel computing applications. <br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I wrote simple hello world code using PETSc environment and found a issue with the output. For instance :</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">When I compile and execute "PETSc_helloWorld.F90" code with multiple processor. It prints following output. </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo">MacUser$ <b>mpiexec -np 4 ./PETSc_helloWorld</b></p>
<p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"><b> Hello from PETSc World, rank: 0 of total 1 processes.</b></p>
<p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"><b> Hello from PETSc World, rank: 0 of total 1 processes.</b></p>
<p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"><b> Hello from PETSc World, rank: 0 of total 1 processes.</b></p>
<p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"><b> Hello from PETSc World, rank: 0 of total 1 processes.</b></p><div><br></div></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Similar code with MPI prints following output: </div><p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"></p><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">MacUser</div>$ <b><span style="font-family:Menlo;font-size:13px">mpiexec</span> -np 4 ./a.out <br></b><p></p>
<p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"><b> Hello from MPI World, rank: 0 </b></p><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline"><b> </b></div><b> of total 4 processes.</b><p></p><b>
</b><p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"><b> Hello from MPI World, rank: 1 </b></p><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline"><b> </b></div><b> of total <div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline"> </div>4 processes.</b><p></p>
<p style="margin:0px;font-size:13px;line-height:normal;font-family:Menlo"><b> Hello from MPI World, rank: 2 </b></p><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline"><b> </b></div><b> of total 4 processes.</b><p></p>
<div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><b><span style="font-family:Menlo;font-size:13px"> </span><span style="font-family:Menlo;font-size:13px">Hello from MPI World, rank: </span><span style="font-family:Menlo;font-size:13px">3</span><span style="font-family:Menlo;font-size:13px"> </span><span style="font-family:Menlo;font-size:13px">of total </span><span style="font-family:Menlo;font-size:13px"> </span><span style="font-family:Menlo;font-size:13px">4</span><span style="font-family:Menlo;font-size:13px"> </span><span style="font-family:Menlo;font-size:13px">processes.</span> </b></div><div><br></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I am not sure is this the issue with the PETSc installation in my machine or am I missing something here?</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I have attached both codes and <i>log_summary</i> of PETSc for your convenience.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Thanks & Regards,</div></div><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><b><font face="verdana, sans-serif">Ajit Desai</font><br></b></div><div><b><font face="verdana, sans-serif" size="1">--</font></b></div><div><div><font face="georgia, serif"><b> Carleton University </b></font></div><div><font face="georgia, serif"><b> Ottawa, Canada</b></font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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