b7616

vulkan: Optimize GGML_OP_CUMSUM (#18417)

• vulkan: Optimize GGML_OP_CUMSUM

There are two paths: The preexisting one that does a whole row per workgroup in a single shader, and one that splits each row into multiple blocks and does two passes. The first pass computes partials within a block, the second adds the block partials to compute the final result. The multipass shader is used when there are a small number of large rows.

In the whole-row shader, handle multiple elements per invocation.

• use 2 ELEM_PER_THREAD for AMD/Intel

• address feedback

macOS/iOS:

• macOS Apple Silicon (arm64)
• macOS Intel (x64)
• iOS XCFramework

Linux:

• Ubuntu x64 (CPU)
• Ubuntu x64 (Vulkan)
• Ubuntu s390x (CPU)

Windows:

• Windows x64 (CPU)
• Windows arm64 (CPU)
• Windows x64 (CUDA 12) - CUDA 12.4 DLLs
• Windows x64 (CUDA 13) - CUDA 13.1 DLLs
• Windows x64 (Vulkan)
• Windows x64 (SYCL)
• Windows x64 (HIP)

openEuler:

• openEuler x86 (310p)
• openEuler x86 (910b)
• openEuler aarch64 (310p)
• openEuler aarch64 (910b)