Hi Andreas, Sorry for the slow turn around in getting back to this issue. During the last month I've been investigating other threading issues relating to DatabasePager/Referenced/Observer, these look to be addressed so I'm now able to return to the issue of the deadlocks you've seen.
Over the last 3 weeks in svn/trunk I've disabled the boundary equalization code so it as to not interfere with my other work on DatabasePager, but now I've re-enabled it and am attempting to re-creating the deadlocks you've seen. So far I haven't been able to. Looking at your stack trace it looks like your using Windows, unfortunately I don't have a Window machine to test against. Would it be possible for you to test svn/trunk out with your data and see if you still see the problem. I haven't merged your suggested fixes yet as I'm still working on understanding the exact dynamics of the dead-locks, once I understand I should be able to spot the most appropriate fix. Ideally I'd be able re-create the dead-lock but may well not to so relying on others like yourself for testing will be required. Thanks, Robert. On Mon, Apr 26, 2010 at 9:24 AM, Andreas Malzahn <[email protected]> wrote: > Hi Robert, > > i fixed the deadlock using a separate mutex on the updateList in Terrain. > Another option would be using a ReadWriteMutex, so the read operations > (traversal and get) don't block each other. > > I think there are also some not thread safe operations in the code, e.g. the > Terrain::getTile(const TileID& tileID) returns a TerrainTile* which could be > deleted in another thread - maybe this should be changed to a osg::ref<>. > > Or the deleting operation should be moved to a location where no other > database threads run and also the viewer thread is not running. > > Regards, > Andreas > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=27278#27278 > > > > > Attachments: > http://forum.openscenegraph.org//files/terrain_550.zip > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
