Some CUDA tasks don't seem to finish at all, staying at 0.10% progress even after a rather absurd amount of time, at least in GPU terms (longest I've left one on is 3 days).

GPU core load stays constantly at around 10%, whereas VRAM usage is only ~256MB throughout the process. One CPU core, however, is also constantly at 100%.

Note that not all CUDA tasks exhibit this behavior, but every now and then one will, and it's hard to keep track of to avoid wasting GPU compute time and power. I've disabled GPU tasks for now until the situation improves.