yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

>>   (Don't use Newton::gravity though, it breaks something in your
>> script and I'm still investigating).
> It is not related to the new Newton::gravity, it only revealed another
> bug in eigen's quaternions.
> In your script, Klaus, the clump sometimes disappear, did you notice? It
> is because the axisAngle conversion of clump members orientation is nan
> from time to time
Actually, no... The nan quaternions break the display but they seem to
be harmless. The problem was https://bugs.launchpad.net/yade/+bug/923929
It is fixed in bzr3009. Below is what I get with your 02_net-wall_par.py
script Klaus (-j2, default collider setting, for 3009 this is without
gravity engine).
The speedup is only 25%. As said before, it can't be much better since
the collider takes only 14% of total time initially.
Still, all engines are a bit faster. :)

Bruno


bzr2999
Name                                                   
Count                 Time            Rel. time
-------------------------------------------------------------------------------------------------------
ForceResetter                                     20050           
7068191us                3.38%     
InsertionSortCollider                              1855          
29429129us               14.06%     
InteractionLoop                                   20050          
92135400us               44.03%     
"gravity"                                         20050          
23556447us               11.26%     
"newton"                                          20050          
57063846us               27.27%     
TOTAL                                                           
209253016us              100.00%

bzr3009
Name                                                   
Count                 Time            Rel. time
-------------------------------------------------------------------------------------------------------
ForceResetter                                     20050           
7087997us                4.68%     
InsertionSortCollider                               634          
11046290us                7.29%     
InteractionLoop                                   20050          
80287582us               52.98%     
"newton"                                          20050          
53130390us               35.06%     
TOTAL                                                           
151552261us              100.00%