Thanks for your suggestion Robert, and also to Markus and Farshid who replied to my first post.
Interestingly, using the SingleThreaded model appears to totally remove the problem. This, at least, provides me with a stable development opportunity, although I am intrigued (and annoyed) by this problem so I'm still trying to hunt down the cause. Using the 2.1.8 SVN version markedly decreased the probability of a crash, but did not remove it. Under this version it's common for the examples to appear to run normally until I *change* the threading model mid-execution, in which case the machine almost always freezes. In response to Farshid's suggestion that I turn nvidia's threading optimization off: I tried this without effect. I already had it disabled for an application that was experiencing trouble (erratic framerate, no crashes), and I can reliably reproduce at least one of the side-effects of this problem using the program found here: http://keyj.s2000.ws/?p=67 The problems this (apparently well-known) nvidia 'feature' causes on my machines seem dissimilar to the problem that I am facing with OSG, plus turning it off doesn't help, so it looks as if the solution lies elsewhere. Setting process affinity had somewhat more interesting results. On the machine with the 6600GT, this also completely removed the problem. No such luck with the 8800GTX, however, despite my already using the latest 162.18 release drivers (which I reinstalled today using a complete file and registry clean). Still, an nvidia vs multicore/multiprocessor conflict seems the most promising avenue of investigation to me right now (unless Serge you have managed to reproduce the problem under different circumstances). I hate to make blanket requests here, but if anyone has any links to information or forum posts about ongoing problems/solutions nvidia windows drivers are experiencing in this department I would greatly appreciate it. Chris. On 8/29/07, Serge Lages <[EMAIL PROTECTED]> wrote: > Just to say that I can't manage to reproduce the freeze, so it must be > something on my side. :) > > > On 8/29/07, Robert Osfield < [EMAIL PROTECTED]> wrote: > > Hi Serge, > > > > On 8/29/07, Serge Lages < [EMAIL PROTECTED]> wrote: > > > Since yesterday I am also experiencing such freezes, but currently I > really > > > can't tell if it's my fault or something else (I am working on the SVN > > > version, WinXP and NVidia 8500GT). > > > > > > As soon as I find some time I'll try to investigate on this. > > > > In general threading should now be much better as I've applied fixes > > last week that I got positive feedback on Windows and OSX. I don't > > recall any recent changes that should unravel this. > > > > Robert. > > _______________________________________________ > > osg-users mailing list > > [email protected] > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > > -- > Serge Lages > http://www.magrathea-engine.org > _______________________________________________ > 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
