Jan, > I'm still working on my parallel rendering project and can't find a > solution for an error for over a month now. > Whenever i call my rendering routine through an action (component- or > plain action), i get a Segfault at glLinkProgram(). > If i call it in hpx_main() as a normal method or through std::async, it > works fine, so my method is not faulty (correct image, no glErrors). > > I want to call it in a component action to render 16 images on 16 > components of a 16-core node/locality simultaneously, but the simplified > version of just calling it once on a 1-core locality in a plain action > in the hpx_main() gives the same segmentation fault. > > I know this most likely is an error on the interaction of OpenGL and > asynchronous actions in general, but maybe someone on this list has an > idea or has used OpenGL with HPX.
Is OpenGL thread-safe in the first place? If you run an OpenGL function from inside an action and use more than one core, you might end up calling into OpenGL concurrently, not sure if that's a problem. Another issue could be that you run out of stack-space. HPX threads have a very limited stack-size by default which is easily overflown. Try running your app with -Ihpx.stacks.small_size=0x20000 to increase the default stack-sizes used. Regards Hartmut --------------- http://boost-spirit.com http://stellar.cct.lsu.edu _______________________________________________ hpx-users mailing list [email protected] https://mail.cct.lsu.edu/mailman/listinfo/hpx-users
