Well, yes. Do you still have high indeterminism after such small value is reached?
-- You received this bug notification because you are a member of Yade developers, which is the registrant for Yade. https://bugs.launchpad.net/bugs/987164 Title: bug with multithreading Status in Yet Another Dynamic Engine: New Bug description: This bug is related to a question: https://answers.launchpad.net/yade/+question/191904 Using multi-threading option in yade leads to instabilities, that are caused by indeterminism. To reproduce the bug, download attached file, extract and run 1-generation.py. You will get a save-file called save1-test.yade. With this file run 2-relaxation.py and wait until its ready (will take a few minutes, be patient). Then a new save file called save2-test.yade will be created. With this save file you can run 3-settling.py to reproduce the bug, see below: 1.) run on 1 core: me@debian ~/YADE/my-yade-projects/multi-threading-bug >yade 3-settling.py Welcome to Yade unknown TCP python prompt on localhost:9001, auth cookie `sauces' XMLRPC info provider on http://localhost:21001 Running script 3-settling.py actual porosity: 46.090125 percent ball with id 2 has maximum velocity of 0.002235 actual porosity: 41.579271 percent ball with id 7 has maximum velocity of 0.354973 actual porosity: 42.846368 percent ball with id 3 has maximum velocity of 0.180586 Yade: normal exit. Beendet 2.) run on more cores: me@debian ~/YADE/my-yade-projects/multi-threading-bug >yade -j4 3-settling.py Welcome to Yade unknown TCP python prompt on localhost:9001, auth cookie `ekcdsa' XMLRPC info provider on http://localhost:21001 Running script 3-settling.py actual porosity: 46.090125 percent ball with id 2 has maximum velocity of 0.002235 actual porosity: 43.217713 percent ball with id 0 has maximum velocity of 0.103208 actual porosity: 43.106072 percent ball with id 20 has maximum velocity of 0.164024 Yade: normal exit. Beendet 2.) run on more cores again, until instability occurs: me@debian ~/YADE/my-yade-projects/multi-threading-bug >yade -j4 3-settling.py Welcome to Yade unknown TCP python prompt on localhost:9000, auth cookie `ssacue' XMLRPC info provider on http://localhost:21000 Running script 3-settling.py actual porosity: 46.090125 percent ball with id 2 has maximum velocity of 0.002235 actual porosity: 42.783835 percent ball with id 5 has maximum velocity of 0.170237 actual porosity: 57.019197 percent !!!!!!!!!!!!!!!BUG LEADS TO INSTABILITY OF THE MODEL HERE !!!!!!!!!!! ball with id 10 has maximum velocity of 3.735641 pure virtual method called terminate called without an active exception Abgebrochen To manage notifications about this bug go to: https://bugs.launchpad.net/yade/+bug/987164/+subscriptions _______________________________________________ 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
