<div dir="ltr"><div><div><div><div>Hi all,<br><br><br></div>Compiling and running <a href="https://code.google.com/p/daneelrepo/source/browse/eth_question/eth.c">this code</a> that builds a petsc matrix gives different results when run with different number of processors.<br>
<br></div>The code is large and complex, so I have created a smaller program with the <a href="http://pastebin.ca/2457643">same loop structure here.</a><br><br></div>Compile it and run it with "mpirun -np $N ./test -draw_pause -1" gives different results for different values of N even though it's not supposed to.<br>
<br></div><a href="http://i42.tinypic.com/2s16ccw.jpg">Here is a sample output</a> for N=1,2,3,4 from left to right.<br><div><div><div><br></div><div>Can anyone guide me as to what I'm doing wrong? Are any of the petssc routines used not parallelizable?<br>
<br></div><div>Thanks in advance,<br></div><div><br></div><div>Regards.<br></div><div><br><div><div><div>-- <br><font face="tahoma, sans-serif">---</font><div><font face="tahoma, sans-serif"><b>Analabha Roy</b></font></div>
<div><font face="tahoma, sans-serif"><a href="http://www.csir.res.in" target="_blank">C.S.I.R</a> <a href="http://csirhrdg.res.in/poolsra.htm" target="_blank">Senior Research Associate</a></font></div><div><font face="tahoma, sans-serif"><a href="http://www.saha.ac.in" target="_blank">Saha Institute of Nuclear Physics</a></font></div>
<div><font face="tahoma, sans-serif">Section 1, Block AF</font></div><div><font face="tahoma, sans-serif">Bidhannagar, Calcutta 700064</font></div><div><font face="tahoma, sans-serif">India</font></div><div><b style="font-family:tahoma,sans-serif">Emails</b><span style="font-family:tahoma,sans-serif">: </span><a href="mailto:daneel@physics.utexas.edu" style="font-family:tahoma,sans-serif" target="_blank">daneel@physics.utexas.edu</a><span style="font-family:tahoma,sans-serif">, </span><a href="mailto:hariseldon99@gmail.com" style="font-family:tahoma,sans-serif" target="_blank">hariseldon99@gmail.com</a></div>
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