[WIP] integrate MORI for FSDP all-gather - #940
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Wire MORI into TorchTitan and Megatron FSDP2, add runtime preflight and multi-node validation, and provide a clear custom all-gather backend selector.
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Size device-driven workspaces from observed shards and default dense-node collectives to async completion so large models avoid excess HBM while overlapping compute. Document execution modes and add comparison tooling and tests.
Use device events, automatic SHMEM sizing, and persistent backing-buffer registration to eliminate host waits and per-step IPC churn. Add standalone bandwidth and GEMM-interference reproducers with focused tests and documentation.
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Working in progress to integrate MORI for FSDP all gather