KernelAbstractions: add Atomix back-end

[maleadt]

See https://github.com/JuliaConcurrent/Atomix.jl/tree/main/lib/AtomixCUDA and JuliaGPU/CUDA.jl#1790

[OsKnoth]

Is there any hope that we will have @atomic for Metal via KernelAbstractions

[anicusan]

I created a pull request for this

[christiangnrd]

This is on the way (JuliaConcurrent/Atomix.jl#42) with Atomix 1.0 so I think we can close this.

[efaulhaber]

What is the current status on this? My kernels with Atomix.@atomic are not running on Metal. Am I doing something wrong or is this not supported yet?

[christiangnrd]

@efaulhaber Can you provide the output of Metal.versioninfo() in the environment you're trying to get it to work?

[efaulhaber]

Your comment sounded like it should be possible, so I cleaned up and updated all my dependent environments and now it works. Thanks!