[Pw_forum] band parallelisation what am I missing?

[Lorenzo Paulatto]

I do not understand this sentence:
I run 3 tests using 272 nband 1, 544 nband 2, 816 nband 3 respectively


On 21 September 2015 at 20:15, Tiana Davide <davide.tiana at epfl.ch> wrote:

> Dear all,
> I would like to exploit/ test the band parallelisation
> I am running a gamma point calculation with nbands 272
>
> I run 3 tests using 272 nband 1, 544 nband 2, 816 nband 3 respectively
> Test1
> dtiana at daint104:/scratch/daint/dtiana> grep time afm-1.out
>      total cpu time spent up to now is       11.8 secs
>      total cpu time spent up to now is       22.0 secs
>      total cpu time spent up to now is       28.0 secs
> Application 5747240 resources: utime ~8080s, stime ~103s, Rss ~173424,
> inblocks ~11263176, outblocks ~13955496
> Test2
> dtiana at daint104:/scratch/daint/dtiana> grep time afm-2.out
>      total cpu time spent up to now is       15.1 secs
>      total cpu time spent up to now is       27.3 secs
>      total cpu time spent up to now is       33.9 secs
> Application 5747236 resources: utime ~17984s, stime ~209s, Rss ~175072,
> inblocks ~22506882, outblocks ~27724272
> Test3
> dtiana at daint104:/scratch/daint/dtiana> grep time afm-3.out
>      total cpu time spent up to now is       20.5 secs
>      total cpu time spent up to now is       30.4 secs
>      total cpu time spent up to now is       36.5 secs
> Application 5747233 resources: utime ~26335s, stime ~309s, Rss ~176636,
> inblocks ~33763645, outblocks ~41493055
>
> I am sure I am doing something stupid but I cannot understand what.
> Can anyone give me a tip?
>
> Cheers
> Davide
>
>
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-- 
Dr. Lorenzo Paulatto
IdR @ IMPMC -- CNRS & Université Paris 6
phone: +33 (0)1 44275 084 / skype: paulatz
www:   http://www-int.impmc.upmc.fr/~paulatto/
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