Dear Paolo,<br>Thanks for your suggestion.<br>Just few more things.<br>1. in GRID_examples, its in 4.2 version examples only. But I think its just a script, and it will work with older versions of espresso's also. Is it so or it will working with espresso 4.2.1 only?<br>
<br>2. With your personal experience, is libraries like scalapack, FFTW increase the calculation speed (the phonon calculation especially) <br>Thanks<br><div class="gmail_quote">O<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><br>
<br>
> You can try Small Displacement Method ( see http://<br>
> <a href="http://www.homepages.ucl.ac.uk/%7Eucfbdxa/" target="_blank">www.homepages.ucl.ac.uk/~ucfbdxa/</a> ) which has different idea than<br>
> DFPT.<br>
<br>
</div>not necessarily a better idea, though<br>
<div><br>
> I am mainly doing Phonon calculation, which generally is time<br>
> consuming ( even in parallel). I just want to know if there is any<br>
> possible way to speed up the calculations<br>
<br>
</div>use a good compiler and machine-optimized mathematical libraries; use<br>
a parallel<br>
computer with fast interconnects; read the user guide about<br>
parallelization; see<br>
also in examples/GRID_example how to split phonon calculations<br>
<br>
Paolo<br>
---<br>
<font color="#888888">Paolo Giannozzi, Dept of Physics, University of Udine<br>
via delle Scienze 208, 33100 Udine, Italy<br>
Phone +39-0432-558216, fax +39-0432-558222<br>
</font><div><div></div><div><br>
<br>
<br>
_______________________________________________<br>
Pw_forum mailing list<br>
<a href="mailto:Pw_forum@pwscf.org" target="_blank">Pw_forum@pwscf.org</a><br>
<a href="http://www.democritos.it/mailman/listinfo/pw_forum" target="_blank">http://www.democritos.it/mailman/listinfo/pw_forum</a><br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Dr. Bipul Rakshit<br>Research Associate,<br>S N Bose Centre for Basic Sciences,<br>Salt Lake,<br>Kolkata 700 098<br>India<br>