<div dir="ltr">Dear Juerg; Thank you for your answer. I calculated nearly the same job for Gaussian09 and CP2K for C240 molecule (contains 240 carbon atom). For BLYP, wall clock times of Gaussian09 and CP2K are similar (about 20min), but for hybrid methods such as PBE0 and B3LYP, the wall clock times are very different. For Gaussian09, PBE0 time is about 40 min, and B3LYP is about 45 min, but for CP2K, PBE0 two cycles of SCF needs 96 min!!!!. It needs at least 10 cycles to SCF to be converged. Please see the attached files. I think this is because I didn't use parallel compiling for Libint (googling doesn't show any parallel compiling for Libint). Thanks again. On Friday, February 17, 2017 at 12:37:35 PM UTC+3:30, jgh wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">Hi without more information I will have to guess: this is most likely NOT a libint problem. Doing a basic PBE0 calculation will cost you about 10 times more than a PBE calculation. Now, if you didn't have enough memory (check the output) this will be even longer. The settings of the HFX part are also crucial for performance (screening). regards Juerg -------------------------------------------------------------- Juerg Hutter Phone : ++41 44 635 4491 Institut für Chemie C FAX : ++41 44 635 6838 Universität Zürich E-mail: <a href="javascript:" target="_blank" gdf-obfuscated-mailto="Gl5MOF3ECAAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">hut...@chem.uzh.ch</a> Winterthurerstrasse 190 CH-8057 Zürich, Switzerland --------------------------------------------------------------- -----<a href="javascript:" target="_blank" gdf-obfuscated-mailto="Gl5MOF3ECAAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">cp...@googlegroups.com</a> wrote: -----To: cp2k <<a href="javascript:" target="_blank" gdf-obfuscated-mailto="Gl5MOF3ECAAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">cp...@googlegroups.com</a>> From: Reza Sent by: <a href="javascript:" target="_blank" gdf-obfuscated-mailto="Gl5MOF3ECAAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">cp...@googlegroups.com</a> Date: 02/17/2017 07:44AM Subject: [CP2K:8704] Libinit compilation Dear Users, I have compile libint and linked it in cp2k ssmp and psmp versions. I used ifort, icc, icpc of intel. speed of GGA BLYP method for fullerene (C240 molecule in 30*30*30 box) is good, but when I use PBE0, a hybrid method, speed is very low. Is it possible to compile libint with mpicc? I think libint should be very fast for HFX, but my performance is very low. I used 6-31G** basis set for C atoms in C240. -- You received this message because you are subscribed to the Google Groups "cp2k" group. To unsubscribe from this group and stop receiving emails from it, send an email to <a href="javascript:" target="_blank" gdf-obfuscated-mailto="Gl5MOF3ECAAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">cp2k+uns...@googlegroups.com</a>. To post to this group, send email to <a href="javascript:" target="_blank" gdf-obfuscated-mailto="Gl5MOF3ECAAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">cp...@googlegroups.com</a>. Visit this group at <a href="https://groups.google.com/group/cp2k" target="_blank" rel="nofollow" onmousedown="this.href='https://groups.google.com/group/cp2k';return true;" onclick="this.href='https://groups.google.com/group/cp2k';return true;">https://groups.google.com/group/cp2k</a>. For more options, visit <a href="https://groups.google.com/d/optout" target="_blank" rel="nofollow" onmousedown="this.href='https://groups.google.com/d/optout';return true;" onclick="this.href='https://groups.google.com/d/optout';return true;">https://groups.google.com/d/optout</a>. </blockquote></div>