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<p>Dear Paolo,</p>
<p>Here I attach the input.</p>
<p>I made several trials, the error is given even if I reduce to 54
the npool, but if I use npool = 24 it runs without problems.</p>
<p>I was submitting the calculation on 4 nodes of the MARCONI KNL
partition (68 cores per node).<br>
</p>
<p>So for now it is ok, as the parallelization is still good with
this setup, however it is a strange behaviour</p>
<p>Lorenzo<br>
</p>
<div class="moz-cite-prefix">On 18/12/19 11:46, Paolo Giannozzi
wrote<br>
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cite="mid:CAPMgbCt8hH7yeqX7zSYwFdcJh81fMpXHWP=zPYrCBTifeEQVQQ@mail.gmail.com">
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<div>Very strange. Can you please provide the input data?</div>
<div><br>
</div>
<div>Paolo<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Dec 18, 2019 at 8:04
AM Lorenzo Monacelli <<a
href="mailto:lorenzo.monacelli@roma1.infn.it"
moz-do-not-send="true">lorenzo.monacelli@roma1.infn.it</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">Dear
QE user list,<br>
<br>
I'm facing the error when using n_pool parallelization that
says that <br>
some processor has no k-point.<br>
<br>
I learned this error appears when the number of n_pool in the
<br>
parallelization is not a good divisor of the total number of
k-points in <br>
a calculation.<br>
<br>
However, in this nscf calculation I'm running I have 216 K
points and <br>
I'm using 216 processors with npool = 108 (see the output)<br>
<br>
So I assume each pool should process 2 k points (I have no
symmetry).<br>
<br>
However, the calculation stops with the error in the
subroutine <br>
divide_et_impera related on the k point division.<br>
<br>
Is there some other constraint in the use of npool that I am
not aware of?<br>
<br>
Bests,<br>
<br>
Lorenzo Monacelli<br>
<br>
<br>
<br>
_______________________________________________<br>
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<br>
-- <br>
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<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>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
Quantum ESPRESSO is supported by MaX (<a class="moz-txt-link-abbreviated" href="http://www.max-centre.eu/quantum-espresso">www.max-centre.eu/quantum-espresso</a>)
users mailing list <a class="moz-txt-link-abbreviated" href="mailto:users@lists.quantum-espresso.org">users@lists.quantum-espresso.org</a>
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