{
  "spec": {
    "rows": 10000000,
    "job": "group_low",
    "engine": "spark",
    "mode": "compute",
    "repeat": 1,
    "cores": 1,
    "heap": "96g",
    "memory": "128g",
    "kind": "single_core_supplement",
    "image_id": "sha256:215b09f971f3ac8d72022ea6e3157d80d88835ceb62899aecd829be0705e12b1"
  },
  "run_id": "0012-a0",
  "status": "completed",
  "source_hash": "68ab7d2564bcb09b20271dfa49f88ce8023df6f097c74c06fba624cf5b2cf3b3",
  "command": [
    "sudo",
    "-n",
    "docker",
    "run",
    "--name",
    "pb-105d32b50d7510cf",
    "--log-driver=none",
    "--network",
    "none",
    "--hostname",
    "localhost",
    "--user",
    "1001:1001",
    "-e",
    "HOME=/tmp",
    "-e",
    "JAVA_TOOL_OPTIONS=-Duser.home=/tmp",
    "-e",
    "SPARK_USER=benchmark",
    "-v",
    "/dev/shm/pb-anl8a3sz/passwd:/etc/passwd:ro",
    "-v",
    "/dev/shm/pb-anl8a3sz/group:/etc/group:ro",
    "--label",
    "pandas-spark-benchmark=worker-v1",
    "--cpuset-cpus",
    "0",
    "--memory",
    "128g",
    "--memory-swap",
    "128g",
    "-e",
    "OMP_NUM_THREADS=1",
    "-e",
    "OPENBLAS_NUM_THREADS=1",
    "-e",
    "MKL_NUM_THREADS=1",
    "-e",
    "SPARK_LOCAL_IP=127.0.0.1",
    "-v",
    "/data/pyspark-pandas-benchmark/data:/data:ro",
    "-v",
    "/dev/shm/pb-anl8a3sz:/control",
    "-v",
    "/data/pyspark-pandas-benchmark/results/20261026-single-core-completion-supplement/0012-a0/output:/output",
    "-v",
    "/data/pyspark-pandas-benchmark/results/20261026-single-core-completion-supplement/0012-a0/scratch:/scratch",
    "sha256:215b09f971f3ac8d72022ea6e3157d80d88835ceb62899aecd829be0705e12b1",
    "python",
    "-m",
    "benchlib.worker",
    "/control/spec.json"
  ],
  "exit_code": 0,
  "worker": {
    "compute_seconds": 2.557605144,
    "measurement_start": {
      "phase": "measurement_start",
      "utc_ns": 1793027395144670518,
      "monotonic_ns": 1656219801173600
    },
    "measurement_end": {
      "phase": "measurement_end",
      "utc_ns": 1793027397702275417,
      "monotonic_ns": 1656222358778744
    },
    "output_rows": 100
  },
  "seconds": 2.557605144,
  "rows_per_second": 3909907.6819811086,
  "clock_drift_seconds": -3.542661133337788e-07,
  "measurement_utc": [
    1793027395.1446705,
    1793027397.7022753
  ],
  "metrics_quality": {
    "valid": true,
    "problems": [],
    "counter_resets": [],
    "minimum_measurement_samples": 2,
    "resolution_insufficient": true,
    "maximum_interval_seconds": 1.0
  },
  "valid": true,
  "signature": {
    "rows": 100,
    "columns": [
      "id1",
      "sum_v1"
    ],
    "unordered_hash_sums": [
      10515569743779244144,
      2716212690307743224
    ],
    "float_round_decimals": 6,
    "nulls": {
      "id1": 0,
      "sum_v1": 0
    },
    "globally_ordered": true,
    "files": [
      {
        "path": "part-00000-51656dd7-28ab-42e1-9345-9a91d9a1130b-c000.snappy.parquet",
        "rows": 100,
        "bytes": 1673,
        "sha256": "14b780f37e03ce9968b7e31369bb297e7f6f4180e1172e5401e5170914461e23"
      }
    ],
    "verification": "streaming probabilistic signature; small fixtures checked by full equality"
  }
}