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band parallelism


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  • From: braun@helios.phy.ohiou.edu
  • To: forum@abinit.org
  • Subject: band parallelism
  • Date: Sun, 22 Aug 2004 21:54:24 +0200

Dear all,
I have run calculations for a molecule with one kpt and have tried to
exploit the band parallelism by using wfoptalg 1 and ndbblock 1,2,4 with
four procs and abinip. I am getting different overall cpu times and total
energies depending on what ndbblock I am using. Furthermore the total cpu time
is two times bigger than by using the sequential version. Tests v1 - v4 run
fine (some precision differences) as well as the parallel tests. Should it not
be faster to use wfoptalg in parallel giving always the same energies ?
Thanks for helping
Kai


  • band parallelism, braun, 08/22/2004

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