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Signed-off-by: Yuki Huang <yukih@nvidia.com>
Signed-off-by: Yuki Huang <yukih@nvidia.com>
Signed-off-by: Yuki Huang <yukih@nvidia.com>
Signed-off-by: Yuki Huang <yukih@nvidia.com>
Signed-off-by: Yuki Huang <yukih@nvidia.com>
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What does this PR do ?
Scale HTTP request handling and tokenization with multiple frontend processes sharing one vLLM engine. Single-frontend behavior remains the default.
What changed
1. Add shared-engine HTTP serving. Set
vllm_cfg.http_api_server_countabove one with async HTTP serving enabled. All frontends share one listening socket.2. Synchronize frontend state. Broadcast token-capture setup and rollout weight versions to every frontend, and aggregate multiprocess Prometheus metrics.
Validation: Ruff checks and formatting pass. GPU validation is pending.