yade-dev team mailing list archive

[Klaus Thoeni <Klaus.Thoeni@xxxxxxxxxxxxxxxx>]

Hi guys,

don't forget to enable feature cgal before compiling ;-)

I checked my test with the implementation in branch lp:~bruno-
chareyre/yade/collide2. Computational speed improves compared to trunk 
version. Very good! And clumps are working as well.

Good job Bruno!

Cheers
Klaus

On Tue, 27 Sep 2011 10:43:28 pm Bruno Chareyre wrote:
> There was indeed a bug with clumps (fixed), but the thing I don't
> understand is the branch did not contain the changes. Bazaar branches
> are not quite user-friendly for commits/updates...
> Klaus, you probably didn't try the good code (but then how did you spot
> the bug? I'm lost...).
> Could you send me a copy of the core/bound.hpp you downloaded, just to
> be sure?
> 
> Bruno
> 
> On 26/09/11 10:37, Bruno Chareyre wrote:
> > (moving to yade-dev)
> > 
> > No guess yet. Thanks for notifying. Which scripts gives the segfault?
> > 
> > B
> > 
> > On 26/09/11 07:43, Klaus Thoeni wrote:
> >> Hi Bruno,
> >> 
> >> I tested your implementation with my examples (dynamic problem with
> >> about 10000 particles) and the computational time in
> >> InsertionSortCollider slightly improved as expected.
> >> 
> >> However, when running your branch with examples with clumps gives a
> >> Segmentation Fault. Any guess?
> >> 
> >> Klaus
> >> 
> >> On Tue, 20 Sep 2011 07:29:02 AM Bruno Chareyre wrote:
> >>> Hi all,
> >>> 
> >>> I worked on some optimizations of contact detection recently and I
> >>> would like to get feedback from you to detect possible bugs and
> >>> confirm the speedup for different applications. If everything is ok,
> >>> the changes can be part of the next release after some code cleanup
> >>> and documentation.
> >>> 
> >>> If you have a chance, could you please download and compile the branch
> >>> lp:~bruno-chareyre/yade/collide2 (bzr checkout
> >>> lp:~bruno-chareyre/yade/collide, cd yade, scons, as usual) and try this
> >>> with your own problems?
> >>> I would be gratefull if you could report differences in terms of
> >>> computation speed.
> >>> I don't expect big improvements for small quasistatic problems. The
> >>> speedup is more likely to happen on large and/or dynamic problems,
> >>> where it should range between x2 and x3, or even more in multithread.
> >>> Some results are reported here:
> >>> https://yade-dem.org/wiki/Colliders_performace#Improved_InsertionSort
> >>> 
> >>> Thanks.
> >>> 
> >>> Bruno

-- 
Dr. Klaus Thoeni - Centre for Geotechnical and Materials Modelling
Civil, Surveying and Environmental Engineering - Engineering Building EA
The University of Newcastle, Callaghan, NSW 2308, Australia
web: http://www.newcastle.edu.au/research-centre/cgmm
phone: +61 (0)2 4921 5118