yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

Does it break compilation without cgal? Oh dear... Then it's another bug
sorry (ZECollider is the problem I guess?), cgal is not mandatory.
I'll document the new algorithm to explain parameters, so you can tune
the collider for different problems.
How much speedup do you have in your simulations?

B

On 28/09/11 08:17, Klaus Thoeni wrote:
> 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


-- 
_______________
Bruno Chareyre
Associate Professor
ENSE³ - Grenoble INP
11, rue des Mathématiques
BP 46
38402 St Martin d'Hères, France
Tél : +33 4 56 52 86 21
Fax : +33 4 76 82 70 43
________________