On 2/26/08, [EMAIL PROTECTED] < [EMAIL PROTECTED]> wrote: > > Send Yade-users mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.berlios.de/mailman/listinfo/yade-users > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Yade-users digest..." > > > Today's Topics: > > 1. Re: Simulation with 100,000 sphere (Bruno Chareyre) > 2. Re: Simulation with 100,000 sphere (Janek Kozicki) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 25 Feb 2008 19:33:09 +0100 > From: Bruno Chareyre <[EMAIL PROTECTED]> > Subject: Re: [Yade-users] Simulation with 100,000 sphere > To: [email protected] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=windows-1252; format=flowed > > 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.
Thanks, Bruno, I am sorry for the later reply. I have to write my own code for my project, that is why I always asked you nice guys some details in DEM or YADE. Of course I also read the code of YADE, but it is a big project with many a good design, but it is complex for me, that is to say some times I can not understand, :(. Thank you guys again. Kan. V?clav ?milauer a ?crit : > >> 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 > > > > _______________________________________________ > > Yade-users mailing list > > [email protected] > > https://lists.berlios.de/mailman/listinfo/yade-users > > > > > > > -- > > _______________ > Chareyre Bruno > Maitre de conference > > Institut National Polytechnique de Grenoble > Laboratoire 3S (Soils Solids Structures) - bureau E145 > BP 53 - 38041, Grenoble cedex 9 - France > T?l : 33 4 56 52 86 21 > Fax : 33 4 76 82 70 43 > ________________ > > > > ------------------------------ > > Message: 2 > Date: Mon, 25 Feb 2008 20:43:19 +0100 > From: Janek Kozicki <[EMAIL PROTECTED]> > Subject: Re: [Yade-users] Simulation with 100,000 sphere > To: [email protected] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-2 > > V?clav ?milauer said: (by the date of Mon, 25 Feb 2008 10:30:00 +0100) > > > 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. > > well, loading xml is slow (binary is faster). Filling PhysicalAction > can be slow too - but currently it's Bruno who currently knows the > best. He is now doing some heavy profiling, I must read carefully his > results. > > -- > Janek Kozicki | > > > ------------------------------ > > _______________________________________________ > Yade-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/yade-users > > > End of Yade-users Digest, Vol 20, Issue 16 > ****************************************** >
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