Ok, thanks. I have a test that uses 96 physical cores WITHOUT thread. The output recorded time is:
PWSCF : 0h57m CPU 1h44m WALL By running the same experiement with 96 physical cores and 2 threads per core (total 192 cores). The output recorded time is: PWSCF : 1h41m CPU 1h39m WALL CPU time in case of 2 threads is larger than NO threads, but wall time in case of 2 threads is less than NO threads. So, I just wonder about the meaning of each criteria? and which one I should consider for performance comparison? Regards On Wed, Sep 30, 2015 at 12:42 PM, Paolo Giannozzi <p.gianno...@gmail.com> wrote: > Yes: "wall time" = "what the clock on the wall shows" > > Paolo > > On Wed, Sep 30, 2015 at 12:29 PM, mohammed shambakey <shambak...@gmail.com > > wrote: > >> Hi >> >> In output files, there is cpu time and wall time. Does wall time include >> cpu time plus any time for transer, I/O, and any thing else? >> >> Regards >> >> -- >> Mohammed >> >> _______________________________________________ >> Pw_forum mailing list >> Pw_forum@pwscf.org >> http://pwscf.org/mailman/listinfo/pw_forum >> > > > > -- > Paolo Giannozzi, Dept. Chemistry&Physics&Environment, > Univ. Udine, via delle Scienze 208, 33100 Udine, Italy > Phone +39-0432-558216, fax +39-0432-558222 > > _______________________________________________ > Pw_forum mailing list > Pw_forum@pwscf.org > http://pwscf.org/mailman/listinfo/pw_forum > -- Mohammed
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