Estimate time for running a input file?

Total energy, geometry optimization, DFT+U, spin....

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lamsalc
Posts: 15
Joined: Thu Aug 18, 2011 10:08 pm

Estimate time for running a input file?

Post by lamsalc » Fri Jan 20, 2012 11:37 pm

Hello Everyone
I am wondering whether there is a way to find an estimate of the time period
required for running input file in abinit before I actullay make the run? Thank you.

mverstra
Posts: 655
Joined: Wed Aug 19, 2009 12:01 pm

Re: Estimate time for running a input file?

Post by mverstra » Sun Jan 22, 2012 4:01 pm

Hello,

not easy - I would extrapolate from small runs with low ecut. Try ecut 2, 5, 7, 10, with identical nkpt, processor distribution, etc... and see how it varies. Might be quadratic with ecut... Of course if you end up with much more memory and communications in the full production run, things will slow down too.

M.
Matthieu Verstraete
University of Liege, Belgium

lamsalc
Posts: 15
Joined: Thu Aug 18, 2011 10:08 pm

Re: Estimate time for running a input file?

Post by lamsalc » Wed Feb 29, 2012 8:24 pm

Hello,
Yes, your answer completely makes sense to me. I will try that. Thank you very much!

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