{
  "schemaVersion": 1,
  "generatedAt": "2026-10-17T02:36:57.526008+00:00",
  "method": "Three libc calls using fd=-1 and a nonempty one-byte range; errno reset before each call.",
  "population": "One Linux host, one invocation per API; deterministic invalid-descriptor checks.",
  "limits": "No valid file was read. This does not measure cache residency, NOWAIT support on a filesystem, latency, durability or prefetch effectiveness.",
  "environment": {
    "kernel": "6.8.0-146-generic",
    "machine": "x86_64",
    "libc": [
      "glibc",
      "2.39"
    ],
    "compiler": "cc (Ubuntu 13.3.0-6ubuntu2~24.04.1) 13.3.0",
    "python": "3.12.3"
  },
  "compileFlags": [
    "-std=c11",
    "-Wall",
    "-Wextra",
    "-Werror",
    "-O2"
  ],
  "sourceSha256": "440420ac1622d7e994bc2b14452e043278c35c7bd0f23009efdc70e5f968b3a7",
  "runnerSha256": "1bd881c6b66e793604ebab8281feedd9724863c79d084c93a79fb7eabab01634",
  "passed": true,
  "EBADF": 9,
  "observations": [
    {
      "api": "posix_fadvise",
      "return": 9,
      "errno": 0
    },
    {
      "api": "readahead",
      "return": -1,
      "errno": 9
    },
    {
      "api": "preadv2",
      "return": -1,
      "errno": 9
    }
  ]
}