ROCm is a total mess, and is Linux only.
OneAPI is in a rather good state considering it’s barely a release candidate now I’ll put my money on Blender support Intel GPUs sooner than AMD ones with Cycles X unless AMD will adopt OneAPI.
ROCm doesn't even run on every AMD card, it only supports a subset of their architectures skewed towards the HPC market
The current and previous generations of consumer AMD cards just don't work with ROCm and there's been no indication they ever will
Re:Cycles X
by sudosysgen on Friday April 23, 2021 @08:36PM
(#26920970)
OneAPI/SYCL also works on AMD if the card supports ROCM.
“Works” and actually works are different things.
ROCm isn’t in a state that i would define actually working atm, considering just how broken their CUDA to HIP stuff is I’m not going to hold my breath.
Re:Cycles X
by sudosysgen on Saturday April 24, 2021 @10:51AM
(#26925257)
SYCL can be targeted directly to HIP without going through Cuda first, but I agree that it's far from perfect. IMO though, it's as useable as OpenCL by now.
I believe an open stack can and will emerge, but it will take time and effort on all levels of the stack. It's possible to do pretty amazing things with Vulkan compute shaders, but the programming model is different than CUDA (it's not single-source), and the tooling support is not quite there.
In time, I am hopeful that WebGPU will gather more momentum, and be officially supported even in places where Vulkan requires janky adapter layers. But in its current form, it's very immature and far from being usable for real workloads.