JuliaArrays / JuliaArrays/StructArrays.jl
Supporting `map` on GPU
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- Dominant language
- Julia
- Stars
- 402
- Forks
- 49
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Description
StructArrays components can be GPU arrays, but many operations on them are not supported yet. For example, a simple map:
using Metal
A = StructArray(a=MtlArray(rand(Float32, 10^3)), b=MtlArray(rand(Int8, 10^3)))
map(exp, A.a) # works
map(x -> exp(x.a), A) # throws "Scalar indexing is disallowed" because `map` falls back to iteration
Would be great to make it work! How do you think could be implemented? I'm not very experienced with GPU arrays and their inner workings.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the Julia example with StructArray components backed by MtlArray, comparing map on a component with map on the StructArray. Read the map and iteration behavior involved in the scalar-indexing fallback. Done means mapping over the StructArray works on GPU arrays without the “Scalar indexing is disallowed” error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- data
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100