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UCX MEMTYPE AVOID COPY=y does not fully prevent memory type copy operations during progress

UCX MEMTYPE AVOID COPY=y does not fully prevent memory type copy operations during progress: a task in LegoFlow-SWE (Harbor dataset). Symptom When the environment variable UCX MEMTYPE AVOID COPY=y is set, the intent is to completely disable any protocol that would execute a memory-type copy…

The task

**Symptom** When the environment variable `UCX_MEMTYPE_AVOID_COPY=y` is set, the intent is to completely disable any protocol that would execute a memory-type copy operation (e.g., CUDA memcpy) so that no CUDA calls occur inside `ucp_worker_progress()`. Despite this setting, some protocols that involve memory-type…

Part of Lego-X/LegoFlow-SWE.