<div dir="ltr"><div dir="ltr">On Wed, Aug 18, 2021 at 1:01 PM Sebastian Hütter <<a href="mailto:sebastian.huetter@ovgu.de">sebastian.huetter@ovgu.de</a>> wrote:</div><div dir="ltr"><br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Do you have an idea where that "large number" is? I've done a few test runs and slab is consistently 10..20% faster, so I guess I'm below that<br></blockquote><div><br></div><div>when the number of MPI processes for FFT parallelization exceeds the third FFT dimension (nr3s), the efficiency of the slab parallelization flattens out (for an obvious reason: there aren't enough slabs)</div><div><br></div><div>Paolo<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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> The choice will be made automatic sooner or later.<br>
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Automatically optimized defaults are always nice :)<br>
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Best,<br>
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Sebastian<br>
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> <br>
> Paolo<br>
> <br>
> <br>
> <br>
> Thanks for any help,<br>
> <br>
> Sebastian<br>
> <br>
> -- <br>
> M.Sc. Sebastian Hütter<br>
> Otto-von-Guericke University Magdeburg<br>
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> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
> Univ. Udine, via delle Scienze 206, 33100 Udine, Italy<br>
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Quantum ESPRESSO is supported by MaX (<a href="http://www.max-centre.eu" rel="noreferrer" target="_blank">www.max-centre.eu</a>)<br>
users mailing list <a href="mailto:users@lists.quantum-espresso.org" target="_blank">users@lists.quantum-espresso.org</a><br>
<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" rel="noreferrer" target="_blank">https://lists.quantum-espresso.org/mailman/listinfo/users</a></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 206, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div></div>