<div dir="ltr"><div><div><div>Hi,<br><br></div>I have a small (~ 2500x2500) dense matrix, say A, parallelized over 480 procs and stored as MPIAIJ instead of MPIDENSE. This is because I have to perform MatMatMult of A with an MPIDENSE matrix, say B. Since MatMatMult is not supported if both A and B are dense, I'm storing A as MPIAIJ. The entries in A are inserted only by processor 0 through MatSetValues. Now while assembling A, I sometimes get segmentation fault. This error is random,it shows up in one run and doesn't in another. I understand that it doesn't make much sense to distribute such a small matrix over 480 procs, but what can be a possible reason for such random segmentation faults? <br><br></div>Regards,<br></div>Bikash<br clear="all"><div><div><div><div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div><div><div><font color="#666666">Bikash S. Kanungo<br></font></div><font color="#666666">PhD Student<br></font></div><font color="#666666">Computational Materials Physics Group<br></font></div><font color="#666666">Mechanical Engineering <br></font></div><font color="#666666">University of Michigan<br><br></font></div></div>
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