<html>#2516: Different simulation result with different number of cores setting
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<tr><td style='text-align:right'> Reporter:</td><td></td></tr>
<tr><td style='text-align:right'> Status:</td><td>open</td></tr>
<tr><td style='text-align:right'>Milestone:</td><td></td></tr>
<tr><td style='text-align:right'> Version:</td><td>ET_2019_10</td></tr>
<tr><td style='text-align:right'> Type:</td><td>bug</td></tr>
<tr><td style='text-align:right'> Priority:</td><td>major</td></tr>
<tr><td style='text-align:right'>Component:</td><td></td></tr>
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<p>Comment (by Roland Haas):</p>
<p>Setting</p>
<div class="codehilite"><pre><span></span>export OMP_NUM_THREADS=1
</pre></div>
<p>would at least remove the known and documented source of differences if you have no checkpointing / recovery. With a single thread then I would expect that your results should exactly identical no matter how many MPI ranks. If they are not identical then that could indicate a bug in the ET (or a bug in my understanding of the ET).</p>
<p>--<br/>
Ticket URL: <a href='https://bitbucket.org/einsteintoolkit/tickets/issues/2516/different-simulation-result-with-different'>https://bitbucket.org/einsteintoolkit/tickets/issues/2516/different-simulation-result-with-different</a></p>
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