2ee9571575621c0ffc2596f245d6b5b14ee9e6a5
PROBLEM: gen_patch.py extracts bi100_* struct fields (items, threads, vec) but VLLM_INJECTION_POINTS keys are (_PARTITION_SIZE, BLOCK_M, NUM_WARPS, etc). These sets don't intersect → zero patches generated → dead pipeline. ROOT CAUSE: enginex ships precompiled .so + Python + Triton — NO .cu source. The csrc/*.cu injection paths in gen_patch.py are all DEAD. Real injection is Python runtime params in paged_attn.py, prefix_prefill.py, triton_flash_attention.py, _custom_ops.py, computility-run.yaml. FIX: derive_injection.py maps CCCL-level parameters to vllm-level parameters: reduce.threads=512, items=24 → _PARTITION_SIZE derivation (GridEvenShare) reduce.* → use_v1 heuristic restore (V2 enables cross-partition reduce) scan.threads=384, items=22 → BLOCK_M=32 (SMEM constraint: 256 head_dim) topk.bits_per_pass=11 → sampling RADIX_BITS topk.threads=512 → sampling thread count transform.bytes_in_flight=64KB → prefetch depth Produces 6 derived values + 3 actionable patch commands. Tested: python3 muh/derive_injection.py outputs all 6 values correctly.
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