<div dir="ltr"><div>Parallelization levels do not appear spontaneously: they have to be implemented, sometimes with a lot of effort. Somewhere in the documentation of SternheimerGW
it must be stated which parallelization levels are available: presumably, k-point and/or plane-wave parallelization. The two parallelization levels you mention are implemented only in a subset of QE codes.<br></div><div><br></div><div>Paolo<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 26, 2020 at 7:31 PM grayj6 <<a href="mailto:grayj6@rpi.edu">grayj6@rpi.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello,<br>
<br>
I have a calculation of Germanium that I would like to run, but I am <br>
uncertain as to how to parallelize it. I have a kpt_grid of 4, 4, 4 and <br>
a qpt_grid of 4, 4, 4. The number of bands, num_band is 18. I did the <br>
scf calculation on a kpoint grid of 8 8 8 0 0 0.<br>
<br>
My current submit command is:<br>
mpirun -np 4 /home/grayj6/data/q-e-qe-6.3/SternheimerGW/main/bin/gw.x <br>
-npool 4 < <a href="http://gw.in" rel="noreferrer" target="_blank">gw.in</a> >gw.out<br>
<br>
... but I do not observe any noticeable speed ups when I add in nbgrp or <br>
ntask parallelization.<br>
<br>
Thank you!<br>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div>