<html>#2890: CarpetX: crash/failed assertion in Z4c_RHS
<table style='border-spacing: 1ex 0pt; '>
<tr><td style='text-align:right'> Reporter:</td><td>Miren Radia</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>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>major</td></tr>
<tr><td style='text-align:right'>Component:</td><td>CarpetX</td></tr>
</table>
<p>Comment (by Miren Radia):</p>
<blockquote>
<p>The problem is likely that the grid is too small for the given number of GPUs.</p>
</blockquote>
<p>I’m not sure about this. I only ran on a single GPU (initially I started on 8 but realised that I could reproduce on just 1) and also started with a more production-sized parameter file with the following grid configuration that reproduces the same problem:</p>
<div class="codehilite"><pre><span></span><code><span>$</span><span class="n">nlevels</span> <span class="o">=</span> <span class="mi">10</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">xmin</span> <span class="o">=</span> <span class="o">-</span><span class="mi">512</span><span class="p">.</span><span class="mi">0</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">ymin</span> <span class="o">=</span> <span class="o">-</span><span class="mi">512</span><span class="p">.</span><span class="mi">0</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">zmin</span> <span class="o">=</span> <span class="o">-</span><span class="mi">512</span><span class="p">.</span><span class="mi">0</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">xmax</span> <span class="o">=</span> <span class="mi">512</span><span class="p">.</span><span class="mi">0</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">ymax</span> <span class="o">=</span> <span class="mi">512</span><span class="p">.</span><span class="mi">0</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">zmax</span> <span class="o">=</span> <span class="mi">512</span><span class="p">.</span><span class="mi">0</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">ncells_x</span> <span class="o">=</span> <span class="mi">128</span>
<span class="n">CarpetX</span><span class="p">::</span><span class="n">ncells_y</span> <span class="o">=</span> <span class="mi">128</span>
<span class="n">CarpetX</span><span class="p">::</span><span
<p>--<br/>
Ticket URL: <a href='https://bitbucket.org/einsteintoolkit/tickets/issues/2890/carpetx-crash-failed-assertion-in-z4c_rhs'>https://bitbucket.org/einsteintoolkit/tickets/issues/2890/carpetx-crash-failed-assertion-in-z4c_rhs</a></p>
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