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Add propagate w_mul_xj CUDA sparse support using matrix mul#610

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CarloLucibello merged 1 commit intoJuliaGraphs:masterfrom
dferre97:df/wmulxj-sparse-cuda
Jul 16, 2025
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Add propagate w_mul_xj CUDA sparse support using matrix mul#610
CarloLucibello merged 1 commit intoJuliaGraphs:masterfrom
dferre97:df/wmulxj-sparse-cuda

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@dferre97
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Added fast w_mul_xj propagate CUDA support for sparse graphs using SpMM.
Added benchmarks to compare with gather/scatter approach, speedup from 40x to 300x on my machine, huge memory allocation benefits (up to 1000x less or more depending on size of graph and sparsity level).
CUDA tests on GraphNeuralNetworks passed.

@CarloLucibello
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Build kite Cuda issues doesn't seem related to this pr, but we have to fix it at some point.

@CarloLucibello CarloLucibello merged commit 9b327d6 into JuliaGraphs:master Jul 16, 2025
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@dferre97 dferre97 deleted the df/wmulxj-sparse-cuda branch July 17, 2025 05:29
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2 participants