<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt">Dear Tran<br>Thank you very much for your advice.<br>I finish the calculations by B3LYP on Nanoribbon with 16 16 1 k-points. But for band structure calculation I have used 20 kpoints at the in-plane of BZ (i.e. M-->Gamma--->K--->Gamma). now after 2 months the 'sumhfpara' hasn't finished yet! Which is very surprising because for SCF it just took about less than one week (on a pc with cpu i7 930). In the following, you will see the case.outputhf_ which is for scf.<br>I think, cpu time for scf should be to much more that cpu time for run_bandplothf_lapw -p. is it right?<br>what is your advice? <br>Best Regards<br>Ali<br><br><br>cpu time (in sec.) for
calc_h:<br>------------------------------<br>total : 3812<br>all before loop ik1 : 0 0%<br>FFT 1 : 0 0%<br>alm, blm,
clm : 0 0%<br>ftmp3a, ftmp3b, ftmp3c : 17 0%<br>FFT 2 : 33 1%<br>qlm,
tdd : 12 0%<br>FFT 3 : 592 16%<br>pseudocharge, potential : 552 14%<br>FFT
4 : 624 16%<br>Hamiltonian in interstitial : 165 4%<br>Hamiltonian in spheres 1 : 2 0%<br>Hamiltonian in spheres 2 : 139 4%<br>diagonalization and other
things : 0 0%<br> <br>wall time (in sec.) for calc_h:<br>-------------------------------<br>total : 3986<br>all before loop ik1 : 0 0%<br>FFT 1
: 0 0%<br>alm, blm, clm : 0 0%<br>ftmp3a, ftmp3b, ftmp3c : 18 0%<br>FFT 2 : 34 1%<br>qlm,
tdd : 13 0%<br>FFT 3 : 621 16%<br>pseudocharge, potential : 577 14%<br>FFT
4 : 653 16%<br>Hamiltonian in interstitial : 173 4%<br>Hamiltonian in spheres 1 : 2 0%<br>Hamiltonian in spheres 2 : 145 4%<br>diagonalization and other
things : 0 0%<br> <br>cpu time (in sec.) for hf:<br>--------------------------<br>total : 3821<br>Hamiltonian (calc_h) : 3812 100%<br> <br>wall time (in sec.) for
hf:<br>---------------------------<br>total : 3995<br>Hamiltonian (calc_h) : 3986 100%<br><div style="display: block;" class="yahoo_quoted"> <br> <br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> On Thursday, November 14, 2013 8:54 AM, "tran@theochem.tuwien.ac.at"
<tran@theochem.tuwien.ac.at> wrote:<br> </font> </div> <div class="y_msg_container">So, I suppose these are the FFTs which take most of the time because of the<br clear="none">large unit cell used for the vacuum. At the end of the files case.outputhf_*<br clear="none">the timing is shown and the values for "FFT 3" and "FFT 4" should be<br clear="none">much larger than the others.<br clear="none"><div class="yqt4601112989" id="yqtfd67537"><br clear="none">On Wed, 13 Nov 2013, ali ghafari wrote:<br clear="none"><br clear="none">> both structures have 3 atoms. Furthermore, I have selected the same values<br clear="none">> in case.inhf for both structures.<br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> On Wednesday, November 13, 2013 8:27 PM, "<a shape="rect" ymailto="mailto:tran@theochem.tuwien.ac.at" href="mailto:tran@theochem.tuwien.ac.at">tran@theochem.tuwien.ac.at</a>"<br clear="none">> <<a
shape="rect" ymailto="mailto:tran@theochem.tuwien.ac.at" href="mailto:tran@theochem.tuwien.ac.at">tran@theochem.tuwien.ac.at</a>> wrote:<br clear="none">> I suppose that it's because there are more atoms in the unit cell for<br clear="none">> nanoribbon than for bulk. How many atoms do contain these unit cells?<br clear="none">> <br clear="none">> In general, since hybrid functionals are very expensive it is<br clear="none">> recommended to do some tests to search for the lowest values of<br clear="none">> the parameters in case.inhf which still leads to the desired accuracy.<br clear="none">> <br clear="none">> On Wed, 13 Nov 2013, ali ghafari wrote:<br clear="none">> <br clear="none">> > Dear Tran<br clear="none">> > Thank you very much for reply.<br clear="none">> > I'm using 50 K-point for ploting band structure of ZrSe2 bulk<br clear="none">> > and nanoribbon. But in the bulk structure
"run bandplothf lapw" is more<br clear="none">> than 100 times faster than nanoribbon. the question is why?<br clear="none">> > Best Regards<br clear="none">> > Ali<br clear="none">> ><br clear="none">> ><br clear="none">> > On Wednesday, November 13, 2013 5:00 PM, "<a shape="rect" ymailto="mailto:tran@theochem.tuwien.ac.at" href="mailto:tran@theochem.tuwien.ac.at">tran@theochem.tuwien.ac.at</a>"<br clear="none">> <<a shape="rect" ymailto="mailto:tran@theochem.tuwien.ac.at" href="mailto:tran@theochem.tuwien.ac.at">tran@theochem.tuwien.ac.at</a>> wrote:<br clear="none">> > sumhfpara does not run in parallel simply because this is the program<br clear="none">> > which merges the vector files case.vectorhf_1, case.vectorhf_2,<br clear="none">> > etc. created by hf on processors 1, 2, etc.<br clear="none">> > Anyway, sumhfpara is very fast (a few seconds). This is hf which is very<br
clear="none">> > expensive. How many k-points are you using for plotting band structure?<br clear="none">> > Maybe you should choose less k-points.<br clear="none">> ><br clear="none">> > F. Tran<br clear="none">> ><br clear="none">> > On Tue, 12 Nov 2013, ali ghafari wrote:<br clear="none">> ><br clear="none">> > > Dear Prof. Blaha<br clear="none">> > > I'm calculating the band structure by hybrid functional B3LYP. for<br clear="none">> polting band structure as<br clear="none">> > > discussed on page 53 of UG, we should run "run_bandplothf_lapw -p" which<br clear="none">> will takes about two weeks<br clear="none">> > > for a structure with 2 atoms.<br clear="none">> > > I see,<br clear="none">> > > lapw1 -band -p<br clear="none">> > > hf -band -p<br clear="none">> > > sumhfpara -band -d<br
clear="none">> > ><br clear="none">> > > my question is: why 'sumhfpara' can not run on parallel? <br clear="none">> > > Best Regards<br clear="none">> > > Ali<br clear="none">> > ><br clear="none">> > ><br clear="none">> ><br clear="none">> > _______________________________________________<br clear="none">> > Wien mailing list<br clear="none">> > <a shape="rect" ymailto="mailto:Wien@zeus.theochem.tuwien.ac.at" href="mailto:Wien@zeus.theochem.tuwien.ac.at">Wien@zeus.theochem.tuwien.ac.at</a><br clear="none">> > <a shape="rect" href="http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien" target="_blank">http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien</a><br clear="none">> > SEARCH the MAILING-LIST at: <br clear="none">> <a shape="rect" href="http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html"
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