Darktable blacklists the beignet opencl driver (which supports the integrated GPU on Intel processors), supposedly because it doesn’t give any speed improvments. Having problems setting up OpenCL to properly work on my dedicated gpu, I decide to benchmark the beignet nonetheless.
I recompiled the latest darktable, removing the beignet from the black list in
opencl_drivers_blacklist.h and benchmarked by processing a raw from a random PlayRaw post.
I benchmarked 9.4sec for the beignet opencl and 11.2sec with opencl disabled (average of three runs each). This is only one benchmark, but seems to me that beignet should be disabled, as it does provide speed improvements.
Are there any disadvantages to enabling OpenCL on beignet?