Add optional CuPy backend with auto-detection#36

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savowe wants to merge 37 commits into

heisenborg/cupy-backend

Commits on Feb 17, 2026

Add optional CuPy backend with GPU auto-detection
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Add self-hosted GPU workflow for CuPy backend tests
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Switch GPU CI to on-demand EC2 runner lifecycle
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Switch GPU CI workflow from EC2 to on-demand RunPod
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Add backend parity tests and benchmark utility
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Harden GPU workflow and add benchmark reporting
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Fix RunPod pod polling query and add HTTP retry handling
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Pin RunPod image tag and validate image reference
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Add SSH proxy fallback and avoid scp dependency in GPU CI
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Reduce RunPod SSH endpoint polling retries
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Run tests from git checkout on pod and support proxy SSH mode
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Add generic backend parity tests and richer benchmark matrix
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Commits on Feb 18, 2026

Harden SSH proxy checks and benchmark artifact retrieval
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Add SSH timeouts to prevent RunPod proxy hangs
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Skip SSH probe in RunPod proxy mode
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Represent inactive k-axes as arrays for CuPy meshgrid compatibility
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Stabilize RunPod benchmark flow and fix CuPy eval imports
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Fix RunPod env propagation for remote benchmark job
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Handle CuPy einsum out kwarg compatibly
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Implement private engine kernel redesign for propagation
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Address PR review feedback for backend selection and CI
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Harden RunPod benchmark artifact transport and SSH endpoint selection
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Fix proxy-mode SSH PTY handling for RunPod CI
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Parameterize RunPod benchmark sizes and runtime settings
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Add stage-level propagation timing to backend benchmarks
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Synchronize GPU stage timers for accurate profiling
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Add analytic 2x2 coupled potential propagator
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Add affine-in-time potential precompute mode
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Revert "Add affine-in-time potential precompute mode"
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Add complex64 propagation mode and benchmark controls
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Commits on Feb 19, 2026

feat: add WP4 fused analytic 2x2 kernel mode
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Commits on Feb 23, 2026

docs: add GPU backend documentation
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docs: update Sphinx config and add RTD config
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docs: refresh README with animation and cleaner structure
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docs: extend diffraction GIF to show full diffraction pattern
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docs: replace comparison table with use-case focus
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docs: remove emoji from README
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