On: Open-source project ZLUDA lets CUDA apps run on AMD GPUs

[mnau]

Cuda is big deal because it works on every nv hw. Plus theyvhave fine tuned sw that utiluzes hw to max.

Amd doesn't. Go watch https://www.youtube.com/watch?v=NPinFkavsrk or https://www.youtube.com/watch?v=AqPIOtUkxNo

That is an attempt to avoid buggy amd implementation and go closer to hw. Everything crashes (kernel), their own demos lock up the card and so on.

[wruza → mnau]

At first I thought "not gonna watch a 6+ hour stream", but decided to give it a go anyway. Those who are interested and have at least ~some assembly background may find all the funny things in the first 10 minutes of the first video, and that isn't even a highlight compilation. I understand the problem much deeper now :) thanks!

[mnau → wruza]

Yea, in the 5:50 of video: Oh no, AMD driver just dereferenced null pointer.

It has been a while since I watched these streams, but that is about the theme of all six hours (and few others streams). It's just complete mine field, where he is trying to walk through a very narrow path of success.

Combine it with things like

this (they now actually have a improved documentation, significant progress): https://github.com/ROCm/ROCm/issues/1714

or this (HIP doesn't support L2 cache coherency, so disable GPU L2 cache) https://docs.amd.com/projects/HIP/en/latest/user_guide/hip_p...

and it's just FUBAR.

[zero_k → mnau]

Haha null deref is funny. Not surprised they are so bad still. They were terrible back then. Didn't improve over time.