<html>#2194: Memory increase during regridding
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<tr><td style='text-align:right'> Reporter:</td><td>Wolfgang Kastaun</td></tr>
<tr><td style='text-align:right'> Status:</td><td>open</td></tr>
<tr><td style='text-align:right'>Milestone:</td><td>ET_2019_02</td></tr>
<tr><td style='text-align:right'> Version:</td><td>development version</td></tr>
<tr><td style='text-align:right'> Type:</td><td>bug</td></tr>
<tr><td style='text-align:right'> Priority:</td><td>minor</td></tr>
<tr><td style='text-align:right'>Component:</td><td>Other</td></tr>
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<p>Comment (by Gabriele Bozzola):</p>
<p>I am trying to perform a simulation of fragmentation of a differentially rotating star. The simulation is rather large and expensive, and it is severely affected by this bug. In the simulation I have three centers of refinement with 13 refinement levels. Initially I have only 8 refinement levels active, and I dynamically increase the number using the Trigger thorn. I move two of the three centers dynamically as well. I can see a steady increase in the memory used, but I can complete the simulation using many nodes and running for at most six hours (in fact, the memory requirement is reset after a checkpoint). Now, I changed initial data and I slightly changed the grid by mainly changing resolution and scaling everything up by a factor of five. With this new set up, the memory leakage is so serious that makes the simulation impossible. My quick tests seems to indicate the the memory requirement increases by a factor of two in less than 512 iterations. No matter how many nod
es I use, I could not run for more than 45 minutes. I am running on Blue Waters, up to 60 nodes, up to 64 GB of memory per process. I tried all the version from 02_18 to the latest, and also the branch rhaas/commstate_free_buffers. Is there anything I can do to help debugging/fixing this problem?</p>
<p>--<br/>
Ticket URL: <a href='https://bitbucket.org/einsteintoolkit/tickets/issues/2194/memory-increase-during-regridding'>https://bitbucket.org/einsteintoolkit/tickets/issues/2194/memory-increase-during-regridding</a></p>
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