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    <p>Dear Moe,</p>
    <p>your inputs are correct, although not optimal (more on this
      later). I did some testing, and it seems that  you ran into a bug
      of the wavelet solver when large boxes and high number of OMP
      threads are involved. We will look into that.</p>
    <p>A box of 50A x 50A x 50A is very, very large. For optimal
      performance, one should pick a box size that is just big enough,
      such that the electronic density vanishes at its edges. In your
      case, 18A x 18A x 18A is sufficient. This choice should speed
      things up significantly, and keep you away from the bug I
      mentioned earlier.</p>
    <p>As a side note, CP2K is better optimized for MPI parallelization
      rather than OMP. From your output file, I can see that you run
      with 1 MPI rank and 36 OMP threads. I would suggest something like
      9 MPI ranks and 4 OMP threads instead (I get a speedup of 10 that
      way).</p>
    <p>Best,</p>
    <p> Augustin</p>
    <div class="moz-cite-prefix">On 1/13/22 21:49, Moe El wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:f9c3b3dd-f39b-496b-8c1d-aa5acd2d313an@googlegroups.com">
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      <div>Hi Everyone,</div>
      <div>I am trying to run a static energy and geometry optimization
        of an rgd chain; however, I always keep getting an error related
        to the solver. I followed the tutorial online and tried to use
        the same methodology for my molecule. I am very new to CP2K and
        I dont know what I am doing wrong. I would like any feedback for
        improvement. Thank you all for your time and effort.<img
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    </blockquote>
    <pre class="moz-signature" cols="72">-- 
Augustin Bussy
Postdoc Researcher
--------------------------

University of Zurich
Augustin Bussy
Department of Chemistry
Research Group Hutter
Winterthurerstrasse 190
CH-8057 Zurich

<a class="moz-txt-link-abbreviated" href="http://www.chem.uzh.ch">www.chem.uzh.ch</a>
<a class="moz-txt-link-abbreviated" href="mailto:augustin.bussy@chem.uzh.ch">augustin.bussy@chem.uzh.ch</a>
--------------------------</pre>
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