Posted by Wade Walker on Jan 26, 2014; 7:25pm
URL: https://forum.jogamp.org/Multi-GPU-processing-inconsistent-tp4031306p4031363.html

So it sounds like you're copying identical data to the two devices, and each device reads the data but doesn't modify it? As far as I know this should work correctly, as long as any output goes to two separate buffers so the results don't collide.

As Sven mentioned a small test case might be helpful here, to see if anyone else sees the same result (I can't test this personally, since I only have one GPU, but some of Sven's cluster machines might have more than one).