yade-dev team mailing list archive

[Klaus Thoeni <klaus.thoeni@xxxxxxxxx>]

Hi Bruno,

thanks for having a look at my scripts!

I know that the clump is disappearing sometimes on the display but the 
simulation itself seems to be ok so I never had a closer look at it. But it 
was good you did ;-)

I just had a look at rev 3010 and now I got some speed up too which is great. 
I will get rid of the GravityEngine and just use NewtonIntegrator::gravity.

Thanks again,

Klaus


On Tue, 31 Jan 2012 08:02:30 AM Bruno Chareyre wrote:
> >>   (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%