<div dir="ltr">Paolo,<div><br></div><div>Thank you. Is there any documentation where I can quickly see which tests this issue would creep in? I will check the other failing tests with better conv_thr.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-im" style="font-size:10.9091px">> I have never run QE in my academic career</span><span class="gmail-im" style="font-size:10.9091px"><br></span><span style="font-size:10.9091px">time to start</span></blockquote><div><br></div><div>The scientific problems I am interested in aren't solved by this package, but through support I will probably have to get more familiar.</div><div><br></div><div>- Barry </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, May 15, 2017 at 1:57 PM, Paolo Giannozzi <span dir="ltr"><<a href="mailto:p.giannozzi@gmail.com" target="_blank">p.giannozzi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Mon, May 15, 2017 at 6:52 PM, Barry Moore <<a href="mailto:moore0557@gmail.com">moore0557@gmail.com</a>> wrote:<br>
<br>
> pw_langevin - <a href="http://langevin.in" rel="noreferrer" target="_blank">langevin.in</a>: **FAILED**.<br>
> pw_langevin - <a href="http://langevin_smc.in" rel="noreferrer" target="_blank">langevin_smc.in</a>: **FAILED**.<br>
> [...]<br>
> Is this expected?<br>
<br>
yes. The "langevin" test is stochastic and you get different results<br>
if you run in serial and in parallel. It should actually be removed.<br>
<span class=""><br>
> There are about 30 failing tests total. They are all "very close" to the correct answer, but not the correct answer.<br>
<br>
</span>Then they are correct. There are two reasons why the results may differ:<br>
- randomized initial wavefunctions depend upon the number of<br>
processors and may result in slightly different paths to convergence<br>
and to a slightly different end point. Such difference may be<br>
minimized by tightening convergence criteria<br>
(conv_thr)<br>
- Those oh so fast mathematical libraries are not always oh so accurate<br>
<span class=""><br>
> I have never run QE in my academic career<br>
<br>
</span>time to start<br>
<span class="HOEnZb"><font color="#888888"><br>
Paolo<br>
<br>
--<br>
Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
Phone <a href="tel:%2B39-0432-558216" value="+390432558216">+39-0432-558216</a>, fax <a href="tel:%2B39-0432-558222" value="+390432558222">+39-0432-558222</a><br>
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</font></span></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><font face="courier new, monospace">Barry E Moore II, PhD<br>E-mail: <a href="mailto:bmooreii@pitt.edu" target="_blank">bmooreii@pitt.edu</a><br><br>Assistant Research Professor<br>Center for Simulation and Modeling<br>University of Pittsburgh<br>Pittsburgh, PA 15260</font><b><br></b></div></div></div></div></div></div>
</div>