{
  "study_id": "dash0-qwen30b-chat-smoke",
  "hardware": {
    "gpu_count": 4,
    "gpu_model": "H20",
    "host_candidates": ["dash0"]
  },
  "model": {
    "model_id": "qwen3-30b-a3b",
    "served_model_name": "qwen3-30b-smoke"
  },
  "engine": {
    "engine_name": "vllm",
    "engine_version": "0.13.0rc2.dev2111+gb44b43f43.d20260309",
    "exec_path": "/usr/local/bin/vllm",
    "cwd": "/home/admin/cpfs/wjh/aituner/aituner",
    "host": "127.0.0.1",
    "port": 18080,
    "healthcheck_path": "/v1/models",
    "ready_timeout_s": 900,
    "request_timeout_s": 900,
    "launch_args": [
      "serve",
      "/home/admin/resource/model/464482ce.qwen3-30b-a3b/1m-instruct-0726-fp4"
    ],
    "base_envs": {
      "CUDA_VISIBLE_DEVICES": "0,1,2,3"
    },
    "base_flags": {
      "host": "127.0.0.1",
      "port": 18080,
      "served-model-name": "qwen3-30b-smoke",
      "max-model-len": 65536,
      "disable-log-requests": true,
      "trust-remote-code": true
    },
    "tunable_envs": [
      "VLLM_ATTENTION_BACKEND"
    ],
    "tunable_flags": [
      "tensor-parallel-size",
      "max-num-seqs",
      "max-num-batched-tokens",
      "gpu-memory-utilization",
      "block-size"
    ],
    "python_executable": "python3"
  },
  "trace": {
    "windows_path": "/home/admin/cpfs/wjh/aituner/aituner/trace_windows/windows.json",
    "window_id": "chat_w20260311_1000",
    "u_field": "sampling_u",
    "timestamp_field": "timestamp",
    "max_concurrency": 2,
    "max_requests_per_probe": 24
  },
  "slo": {
    "target_pass_rate": 0.95,
    "ttft_rule": {
      "kind": "step_ms",
      "buckets": [
        {"max_input_tokens": 4096, "threshold_ms": 15000},
        {"max_input_tokens": 16384, "threshold_ms": 30000},
        {"threshold_ms": 45000}
      ]
    },
    "tpot_rule": {
      "kind": "fixed_ms",
      "threshold_ms": 1500
    }
  },
  "search": {
    "low": 0.0,
    "high": 1.0,
    "tolerance": 0.1,
    "max_probes": 4,
    "sample_seed": 20260325
  },
  "llm": {
    "system_prompt": "Propose a single engine config patch that increases the maximum feasible sampling_u under the SLO target.",
    "max_history_trials": 8
  }
}