Hi Bruno, I just had a look at the code and NormShearPhys is used in many other places as well. This means that it is always assumend that there is a normal and a shear force. So probably I should derive WirePhys from NormSherPhys and set ks and Fs equal to zero.
What do you think? Klaus On Mon, 10 Oct 2011 11:51:40 PM Bruno Chareyre wrote: > Hi, > > If you can get 0 after pausing, then it's a good starting point for > debugging. In release build, you may try and check if there are forces > on the bodies. > In debug build (does it give 0 too?) you could set a breakpoint at > Shop.cpp:162 and see what happens line by line, surely the best way. > > Bruno > > On 10/10/11 14:16, Klaus Thoeni wrote: > > Hi, > > > > yes, if you pause the simulation unbalancedForce() is still exactly 0. > > > > Regarding the results for displacements: > > - if I run the same file with -j1 I will get exactly the same > > deformation, however the the unbalancedForce is not exactly the same > > - if I compare the displacements of a case where I used > > multi-threading the displacements are exactly the same for a certain > > amount of iterations then the slightly differ (even if unbalancedForce > > is 0 from beginning) > > > > I am still trying to find out what's going on. Any hints are welcome! > > > > Thanks, > > Klaus > > > > > > > > On Fri, Oct 7, 2011 at 9:35 PM, Bruno Chareyre > > > > <bruno.chare...@hmg.inpg.fr <mailto:bruno.chare...@hmg.inpg.fr>> wrote: > > I can't imagine any explanation yet. It is strange. > > I wonder if the unbalanced force will also be exactly 0 if you > > pause the > > simulation and type unbalancedForce() in the terminal. > > Are you sure that the results in terms of positions and deformation > > of the net are always the same? else it could mean that there is > > another problem that the unbalanced force is only reflecting. > > > > Bruno > > > > On 07/10/11 07:08, Klaus Thoeni wrote: > > > Hi guys, > > > > > > yes, you have to try it several times in order to reproduce the > > > > strange > > > > > behaviour. > > > > > > However, I found out a bit more. Actually it might be a problem > > > > with multi- > > > > > threading. Maybe someone can try to reproduce the behaviour. The > > > > following > > > > > link provides a slightly modified version my script and a bash > > > > script which > > > > > allows for several executions for -j1 and -j2 (before running the > > > > script make > > > > > sure it is executable 'chmod +x runscript'). In addition I > > > > included as well my > > > > > results. > > > > > > http://bit.ly/rtN0w3 > > > > > > Something very strange is that my desktop has the same problem > > > > even with -j1 > > > > > (eaven cpu usage is more than 100% and I have no idea why) > > > > whereas my notebook > > > > > gives the right results in that case (cpu usage is max 100%) just > > > > have a look > > > > > at the graphs. It would be good to find out if this problem > > > > effects just me or > > > > > if it is a general problem in YADE. Any hints are welcome and I > > > > really > > > > > appreciate your help! > > > > > > Thanks > > > > > > Klaus > > > > > > On Thu, 6 Oct 2011 07:58:24 PM Bruno Chareyre wrote: > > >> I tried the script and didn't find the problem. It needs more runs > > >> maybe. But first, could you explain how you use the function (in a > > >> periodic engine/ live typing/a command in the script)? It would > > >> help understanding what happens. > > >> > > >> Bruno > > >> > > >> On 06/10/11 07:53, Klaus Thoeni wrote: > > >>> Hi Anton, > > >>> > > >>> I tired it already (I know this issue), still the same > > > > behaviour. And now > > > > >>> actually I got zero for Bruno's branch as well. Very strange :-( > > >>> Not sure what the problem is. Would be great if someone could > > > > try if > > > > >>> he/she gets the same behaviour. > > >>> > > >>> Thanks, > > >>> Klaus > > >>> > > >>> On Thu, 6 Oct 2011 04:30:53 PM Anton Gladky wrote: > > >>>> Hi Klaus, > > >>>> try to start your script with -j1 option. > > >>>> There are sometimes some issues with "numerical" error in > > > > multi-thread > > > > >>>> mode. > > >>>> > > >>>> Anton > > >>>> > > >>>> On Thu, Oct 6, 2011 at 6:40 AM, Klaus Thoeni > > > > <klaus.tho...@gmail.com <mailto:klaus.tho...@gmail.com>> > > > > > wrote: > > >>>>> Hi guys, > > >>>>> > > >>>>> I just wanted to use the function unbalancedForce in one of > > > > my scripts. > > > > >>>>> And look what is happening: running the same simulation > > > > several times > > > > >>>>> after each other gives different results for the > > > > unbalancedForce. Well > > > > >>>>> either some values which seem all right or just zero. The > > > > script I used > > > > >>>>> is: > > >>>>> examples/WireMatPM/wirecontacttest.py > > >>>>> > > >>>>> Even using different computers and different versions of yade > > > > gives > > > > >>>>> this problem. However, it doesn't happen all the time. It > > > > seems like > > > > >>>>> you have to try several times to get the wrog value (which is > > > > zero) > > > > >>>>> for unbalancedForce and if I use Bruno's collide2 branch it > > > > seems to > > > > >>>>> work all the time. > > >>>>> > > >>>>> So I don't know if it is a problem with my script or a > > > > problem of the > > > > >>>>> current trunk version. Can anyone reproduce this problem? > > >>>>> > > >>>>> Thanks > > >>>>> Klaus > > >>>>> > > >>>>> _______________________________________________ > > >>>>> Mailing list: https://launchpad.net/~yade-dev > > > > <https://launchpad.net/%7Eyade-dev> > > > > >>>>> Post to : yade-dev@lists.launchpad.net > > > > <mailto:yade-dev@lists.launchpad.net> > > > > >>>>> Unsubscribe : https://launchpad.net/~yade-dev > > > > <https://launchpad.net/%7Eyade-dev> > > > > >>>>> More help : https://help.launchpad.net/ListHelp > > >>>> > > >>>> _______________________________________________ > > >>>> Mailing list: https://launchpad.net/~yade-dev > > > > <https://launchpad.net/%7Eyade-dev> > > > > >>>> Post to : yade-dev@lists.launchpad.net > > > > <mailto:yade-dev@lists.launchpad.net> > > > > >>>> Unsubscribe : https://launchpad.net/~yade-dev > > > > <https://launchpad.net/%7Eyade-dev> > > > > >>>> More help : https://help.launchpad.net/ListHelp > > >>> > > >>> _______________________________________________ > > >>> Mailing list: https://launchpad.net/~yade-dev > > > > <https://launchpad.net/%7Eyade-dev> > > > > >>> Post to : yade-dev@lists.launchpad.net > > > > <mailto:yade-dev@lists.launchpad.net> > > > > >>> Unsubscribe : https://launchpad.net/~yade-dev > > > > <https://launchpad.net/%7Eyade-dev> > > > > >>> More help : https://help.launchpad.net/ListHelp > > > > -- > > _______________ > > 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 <tel:%2B33%204%2056%2052%2086%2021> > > Fax : +33 4 76 82 70 43 <tel:%2B33%204%2076%2082%2070%2043> > > ________________ > > > > > > _______________________________________________ > > Mailing list: https://launchpad.net/~yade-dev > > <https://launchpad.net/%7Eyade-dev> > > Post to : yade-dev@lists.launchpad.net > > <mailto:yade-dev@lists.launchpad.net> > > Unsubscribe : https://launchpad.net/~yade-dev > > <https://launchpad.net/%7Eyade-dev> > > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~yade-dev Post to : yade-dev@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-dev More help : https://help.launchpad.net/ListHelp
