LuxCoreRender Forums

Yes, the results are really strange. I get very low cuda performance in general with my builds compared to the azure build, factor 4 slower for the 1080. The OpenCL kernel compilation ended with the mentioned error messages. I tested various versions of cuda SDK (8.0, 10.1 and 10.2) and the results ...

I have installed cuda sdk 10.2 for the new compilation of the new code. The old one I had installed was 8.0, IIRC. Could that be the source of the problem of the error messages?

Yes, it is the same with the cuda version and also the opencl only version.

I get errors with latest build and OpenCL and the food demo scene, too, e.g. PATHOCL:clFinish(CL_INVALID_COMMAND_QUEUE) or TILEPATHOCL: clEnqueueReadBuffer(CL_OUT_OF_RESOURCES). With cuda my GTX 780 is 1.5 times faster than the GTX 1080. Is it normal behaviour? However, only Blender crashes, LuxCor...

I get errors with latest build and OpenCL and the food demo scene, too, e.g. PATHOCL:clFinish(CL_INVALID_COMMAND_QUEUE) or TILEPATHOCL: clEnqueueReadBuffer(CL_OUT_OF_RESOURCES). With cuda my GTX 780 is 1.5 times faster than the GTX 1080. Is it normal behaviour?

With the latest fixes it works fine for me.

The same happens if you change some render config with only one device selected, e. g. sampler or render size. I'm not able to replicate this. Are you running LuxCoreUI and just selecting a different sampler ? Yes, I selected only one device and change the sampler in LuxCoreUI or resized the LuxCor...

Yes, it is related to multi GPU config. It compiles the kernels and exit without error. The same happens if you change some render config with only one device selected, e. g. sampler or render size.

The crashes are due to blender mantaflow code, e. g. cache file management.

I have pushed a first fix for support of mantaflow in Blender 2.82. There are a lot of bugs in Blender still. It crashes very often.