yade-dev team mailing list archive

[Anton Gladky <gladky.anton@xxxxxxxxx>]

Ok, I will try to use another verletDist.
Anyway, I think we should not merge the branch before 0.70 release.
The current collider is a little slower, but it is tested.
We need to think about adding one more collider or replacing by a new one.
Do you agree?

Anton




On Tue, Oct 18, 2011 at 7:01 PM, Bruno Chareyre
<bruno.chareyre@xxxxxxxxxxx> wrote:
> Yes, this is expected: the new is better with more threads and also with
> more bodies. How many bodies in your simulation?
> The fact that you find worst speed for j=1 is annoying though... Until
> now I only found new speed at least equal to old, but you found some
> cases where new < old.
> It makes the choice of moving to the new algorithm difficult, or it
> suggests to have two colliding logics but it is uneasy since it also
> affects Newton, aabb dispatching, interaction container...
>
> We need however to consider the tuning of parameters. Maybe the default
> values I defined are not good in your case and another optimum can be
> found. If you could send me a simplified script I could test. Or for a
> simple test, you could just decrease verletDist. The default is 0.9, you
> could try the same as in the old algorithm: 0.05, and see what happens.
>
> Bruno
>
> On 18/10/11 18:23, Anton Gladky wrote:
>> Ok, seems, warnings are gone.
>>
>> Speed, iter/sec
>> -j    Old collider    New_Collider:
>> 1          7.94                 6.7
>> 2          13.85               12.89
>> 3          14.83               16.11
>>
>> The new collider works better with threads more than 2.
>>
>> Anton
>>
>>
>>
>>
>> On Mon, Oct 17, 2011 at 3:57 PM, Bruno Chareyre
>> <bruno.chareyre@xxxxxxxxxxx> wrote:
>>> Hi Anton,
>>>
>>> I commited fixes for the collider (branch collide2, r2925) and for cgal
>>> feature. I don't find any problem when removing bodies now, but let you
>>> try with your scripts.
>>> Now, all interactions should be removed correctly after deleting bodies.
>>>
>>> Bruno
>>>
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>
>
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