Add CuPy GPU simulation with double-buffered streaming pipeline and nsys profiling#5

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tackandr with Copilot wants to merge 8 commits into

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copilot/add-cupy-simulation

Commits on Apr 6, 2026

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Add CuPy GPU simulation with double-buffered streaming pipeline

Copilot
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tackandr
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Fix np.frombuffer call: pass explicit count when wrapping PinnedMemoryPointer

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tackandr
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Add --profile flag for per-chunk CUDA kernel and D2H timing

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tackandr
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Add cupyx.profiler.time_range NVTX annotations for nsys profile support

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tackandr
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Fix double-buffer race: use per-slot chunk_gpus to remove D2H/kernel dependency

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tackandr
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Write each chunk to a separate .npy file; drop growing history array

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tackandr
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Remove --profile/Event timing; keep only NVTX time_range annotations

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tackandr
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