<div dir="ltr"><div dir="ltr">Dear Daniel:</div><div dir="ltr"><br></div><div dir="ltr">Regarding this issue, you could try the following recent merge request:<br><div><br></div><div><a href="https://gitlab.com/QEF/q-e/-/merge_requests/1176">https://gitlab.com/QEF/q-e/-/merge_requests/1176</a><br></div><div><br></div><div>Sincerely,<br></div><div><br></div><div>Hyungjun Lee</div><div>UT Austin</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 16, 2020 at 1:08 PM Daniel Marchand <<a href="mailto:t-dmarchand@microsoft.com">t-dmarchand@microsoft.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
<div lang="EN-US" style="word-wrap:break-word">
<div class="gmail-m_-1618815216944481574WordSection1">
<p class="MsoNormal">Hi Everyone,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">We’re having some trouble running pw2wannier on a very large system as it is running very slow. To give some comparison, we are able to finish the nscf calculation in ~4hours, while pw2wannier has not finished the first MMN: iknum step
even after ~8 hours of runtime. It seems like in theory pw2wannier should be parallelizable but we found poor performance beyond a single node.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Is there anything we can do to help speed up the process? Parallelization steps to try out or common pitfalls that we could avoid?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Best,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Daniel <u></u><u></u></p>
</div>
</div>
_______________________________________________<br>
Wannier mailing list<br>
<a>Wannier@lists.quantum-espresso.org</a><br>
<a rel="noreferrer">https://lists.quantum-espresso.org/mailman/listinfo/wannier</a><br>
</blockquote></div>