Thank you very much, Paolo. Trinh
On 8/28/10 11:54 AM, "Paolo Giannozzi" <giannozz at democritos.it> wrote: > > On Aug 28, 2010, at 20:14 , Vo, Trinh (388C) wrote: > >> For all my jobs, the wall time is usually significantly larger than >> the CPU time >> [...] I don?t know what are the possible reasons that causes this >> delay. > > 1) time spent in I/O > 2) time spent in communications (in parallel execution) > >> What factors I should look at to fix this problem. > > 1) reduce I/O, or use fast I/O channels > 2) faster communication hardware, or usage of parallelization > levels requiring less communications. > > More in the user guide > > P. > --- > Paolo Giannozzi, Dept of Physics, University of Udine > via delle Scienze 208, 33100 Udine, Italy > Phone +39-0432-558216, fax +39-0432-558222 > > > > _______________________________________________ > Pw_forum mailing list > Pw_forum at pwscf.org > http://www.democritos.it/mailman/listinfo/pw_forum
