{
  "host": "scan",
  "cell": "cpp/vma/pool",
  "schedule_version": 4,
  "classification": "nonpublishing ring comparison; no maximum-throughput or reliability verdict",
  "source_commit": "301c5dbb518c8302f6f060f51ff2fda0e3645e32",
  "cpp_build_source": "5e011904e55d2e42c7e6544da47a74794815da19",
  "source_and_installed_manifests_equal": true,
  "changed_environment_keys": [
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    "VMA_RING_LOGIC"
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  "port": 45702,
  "rate": 50000,
  "rows": [
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      "evidence": "/tmp/libhft-cpp-vma-rings-20260910-dFEZjl/comparison-ring0",
      "finished_utc": "2026-09-09T23:15:41Z",
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        }
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        "WARN": 1
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      "raw": {
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        "samples_per_probe": 1920000,
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        "worst_us": "48.362",
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        "scheduler_delay_p99_us": "1.656"
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        "measured_sheds": 0,
        "measured_deficits": 0,
        "exact_marker_all_clients": true,
        "service_and_response_four_quantiles": true,
        "scheduler_p99": true,
        "logged_session_run_means": true,
        "logged_aggregate_maxima": true,
        "final_raw_and_text_hashes_revalidated": true
      },
      "one_second_windows": {
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        ],
        "completions": [
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        ],
        "generator_backlog_before_end": [
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      "evidence": "/tmp/libhft-cpp-vma-rings-20260910-dFEZjl/comparison-ring20",
      "finished_utc": "2026-09-09T23:18:38Z",
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        }
      },
      "stability": {
        "PASS": 30,
        "WARN": 2
      },
      "live_pinning": {
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      },
      "raw": {
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        "series": 288,
        "samples_per_probe": 1920000,
        "drops": 0,
        "clamps": 0,
        "response_equals_service_plus_scheduler": true
      },
      "metrics_us": {
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        "p99_us": "37.034",
        "p999_us": "47.787",
        "worst_us": "67.629",
        "resp_p50_us": "14.868",
        "resp_p99_us": "37.836",
        "resp_p999_us": "48.778",
        "resp_worst_us": "68.551",
        "scheduler_delay_p99_us": "1.924"
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      "exact_metrics_verified": {
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        "measured_sheds": 0,
        "measured_deficits": 0,
        "exact_marker_all_clients": true,
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        "scheduler_p99": true,
        "logged_session_run_means": true,
        "logged_aggregate_maxima": true,
        "final_raw_and_text_hashes_revalidated": true
      },
      "one_second_windows": {
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        ],
        "completions": [
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        "generator_backlog_before_end": [
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        "outstanding_before_end": [
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      },
      "hashes": {
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  ],
  "limitations": [
    "One three-pass control at each setting, with an earlier normal ring-20 observation; not randomized or an exhaustive intermittent-failure test.",
    "Ring 20 has VMA runtime readbacks. Ring 0 is bound by exact argv and verified installed launcher; the VMA INFO banner omits its default.",
    "Raw task-start windows are not wire timing or observed server queue occupancy; sampled affinity is not continuous proof.",
    "Both controls retain stability warnings. No timeout/cap/CV gate changed and neither was imported into the target matrix."
  ]
}