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Re: [abinit-forum] bandfft paralelization


Chronological Thread 
  • From: "Durgun Engin" <Engin.Durgun@ulg.ac.be>
  • To: forum@abinit.org
  • Subject: Re: [abinit-forum] bandfft paralelization
  • Date: Thu, 20 Dec 2007 22:36:26 +0100 (CET)
  • Importance: Normal

First of I would like to thank you for your responses. I have one final
question. As you mentioned I switched to new version. (abinip5.5.2) and
try to perform the same calcuations with 2, 4, and 8 processors. For each
calculation I am still receiving "nproc =4 .= kpoint =1*nsppol =1 the
number of processors is larger than nkpt. This is a waste." Shall I ignore
this warning? And for the time:

2cpu: 188 sec per cpu
4cpu:197 sec per cpu
8cpu:191 sec per cpu

An increase in speed can not be noticed. Do you have an idea about what i
am doing wrong? Thank you in advance...

Engin


nband 16
iscf 5
nstep 100
toldfe 1.0d-5

npband 2 (4 and 8)
npfft 1
timopt -1
fftalg 401
wfoptalg 4
fft_opt_lob 2
iprcch 0
intxc 0
nloalg 4
istwfk 1

# System
acell 18.0 18.0 18.0
angdeg 60.0 60.0 60.0
ecut 30.0
natom 2
ntypat 1
znucl 79
typat 1 1
xangst
0.0 0.0 -1.3550
0.0 0.0 1.3550

# Common parameters
ixc 1
nkpt 1
kpt 0.0 0.0 0.0
wtk 1.0
occopt 1
diemac 1.0


------------------------------------------------------------------
Engin Durgun
University of Liege
Physics Department, Bat. B5 Phone : ++(32) (0)4-366.36.12
B-4000 Sart Tilman Fax : ++(32) (0)4-366.36.29
Belgium e-mail: engin.durgun@ulg.ac.be
------------------------------------------------------------------





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