yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

Kan, could you install callgring /vallgrind/kcachegrind and run this 
command :

valgrind --tool=callgrind ./yade-svn1258 -n -- -f 
/home/bruno/YADE/data/scene.xml -v 1000 -p -m 2

with scene.xml = your 100k spheres simulation. It will make only two 
iterations then stop, and you will get a nice file in /bin that you can 
open with kcachegrind. It will show which function takes all this time.

And yes, I suspect physicalActionContainer too.

Bruno

p.s. saving/loading in binary format would be faster probably.


Václav Šmilauer a écrit :
>> I also need to do large scale simulation which may need to do around
>> 500,000 for field engineering case. but instead of using YADE I have
>> to develop my own code to do this, :(.
>> In my opinion, the CPU computing time is the most important issue in
>> DEM, while the memory is determined by the total particle number, and
>> you data-structure design, 2GB can do a lot for a 2D case, for 3D case
>> you may need more memory. but the momory requirements will not change
>> much when your total particle number is defined.
>>     
> Since Bruno just began hunting bottlenecks, Yade could be useful even
> for 5e5 - in the current state, one iteration would take about 5 seconds
> (by extrapolation).
>   
>>  
>> hi, Vaclav,
>> is it possible that the 5 mins used for packing or sample preparation
>> to fill the container? I just guess, for my case, it takes some time
>> for this step and then enter the cycling.
>>     
> No, I was loading that file from .xml and it took that time after
> starting the simulation that had been already loaded. I think Janek
> (ping Janek ;-) ) could comment on this, the PhysicalAction containers
> can take a lot of time to initialize.
>
> Vaclav
>
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Chareyre Bruno
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