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Load the computed-token and deferred PP-update kernels at worker startup, before synthetic warmups can post feedback receives. Use scratch counters and a negative request index to preserve request state, and keep the preload independent of optional JIT warmup, including eager mode. Keep PP feedback active through the existing warmup trajectory and remove PPHandler's disabled state. Cover preload ordering and stage selection with JIT warmup both enabled and disabled. Co-authored-by: Codex <noreply@openai.com> Signed-off-by: Summer Yang <girasoleyang@gmail.com>
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Load both PP state-update kernels before startup warmups can post feedback receives. This keeps normal PP communication active throughout warmup and removes
PPHandler.disabledand its bypasses. Scratch counters and a negative request index preserve request state during the preload.The preload runs independently of
enable_jit_warmup, including--enforce-eager, which now disables optional JIT warmup. The worker retains one synthetic warmup trajectory.This is a focused follow-up into the source branch of vllm-project#56956. Duplicate checks found no existing PR for this explicit-preload change. Production code changes total 15 insertions and 39 deletions.
Validation:
pytest tests/v1/worker/test_mixed_warmup_gate.py tests/v1/worker/test_gpu_model_runner_v2.py tests/v1/worker/test_pp_utils.py tests/v1/worker/test_gpu_warmup_blocks.py -q -p no:cacheprovider. Executed throughpytest.main()in the existing Python 3.12 environment withPYTHONPATH=. PYTHONDONTWRITEBYTECODE=1and a teardown-onlytorch.accelerator.empty_host_cache = lambda: Noneshim to avoid the known macOS cleanup crash.mypy-3.12manual hook, andgit diff --checkpassed for the six changed files.Full DSpark PP GPU startup and model evaluation have not been rerun on this branch. This is a draft pending that validation, including checking for other late kernel loads; it does not claim that preloading these two kernels covers every backend specialization.
AI assistance: prepared with OpenAI Codex from the previously reviewed preload prototype.