Vulkan: adding GGML_OP_MULTI_ADD implementation#582
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This is relevant for MoE models. The performance improvement is surprisingly small. Somewhere it was mentioned that Vulkan kernel launch overhead is significantly larger than CUDA, so I would have expected a more significant performance benefit. For DeepSeek-Lite, the number of graph nodes in
ik_llama.cppwith this PR is 1420 vs 1871 in mainlinellama.cpp.But, if nothing else, this removes the last Vulkan special-casing when building the compute graph.