[fix] MD-TRT: rebind NCCL communicator after execution context invalidation - #4464
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[fix] MD-TRT: rebind NCCL communicator after execution context invalidation#4464apbose wants to merge 1 commit into
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bind_nccl_comm() attaches the communicator to the IExecutionContext. disable_profiling() and set_resource_allocation_strategy() dropped that context without clearing nccl_initialized, so the lazy re-bind in execute_engine.cpp never fired and the replacement context ran collectives with no communicator (~98% output mismatch). Mirrors runtime_settings(). Verified on 2 GPUs: both new tests fail before the fix and pass after.
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bind_nccl_comm() attaches the communicator to the IExecutionContext. disable_profiling() and set_resource_allocation_strategy() dropped that context without clearing nccl_initialized, so the lazy re-bind in execute_engine.cpp never fired and the replacement context ran collectives with no communicator (~98% output mismatch). Mirrors runtime_settings().