{
  "status": "passed",
  "unit": "milliseconds",
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      "oom_kills": 0,
      "outer_throttled_usec": 0
    },
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  },
  "measured_pairs": 6,
  "provenance": {
    "agent_sha256": "4dff5e8e6a29e79fb4856e8043b8fc05b047044714149ce928f20f75ed18db7a",
    "baseline_sha256": "4ff59594af008ff0efb517e9c70cb90d5cf7c240dc0f71d53a162c7b4a0eea2d",
    "benchmark_script_sha256": "a04caa337a35989a4df9d88bab061037c178f45cf1b493c2445a2226e8e2f5fb",
    "cache_state": "Prepared artifacts and decompressed templates; warm host caches, no cache dropping, no downloads timed; each lifecycle creates a new microVM.",
    "consumer_lock_sha256": "adcd77a39eb5d0b8e05d45eaad3e287b61c49ca65ca4fb6fc28c66116540762f",
    "cpu_affinity_pinned": false,
    "cpu_governor": "powersave",
    "date_local": "2026-09-16",
    "direct_kernel": "7.1.5-76070105-generic",
    "elixir": "1.20.4",
    "execution_host": "ssh linux only; no macOS execution tests",
    "guest_python": "3.12.14",
    "hardware": "Intel Core i5-1135G7, four cores / eight threads, approximately 64 GiB RAM",
    "libkrun_sha256": "2a58b2fcd8975972c6c1eba0aa687ad0e7844069209d9e56e3bdb4afe6e9fbf7",
    "libkrunfw_sha256": "767495f52bd786e6e0b0fa1b04adf40dea44b80019f6953ca6eb6394cc90d264",
    "measured_window_utc": [
      "2026-09-17T02:24:40Z",
      "2026-09-17T02:27:22Z"
    ],
    "microvm": {
      "cpus": 1,
      "memory_mb": 512,
      "network": "offline",
      "overlay_gb": 1,
      "storage_gb": 1
    },
    "microvm_kernel": "6.12.95",
    "nested_worker_kernel": "6.8.0-139-generic",
    "otp": "29.0.6",
    "outer_vm": {
      "cpus": 4,
      "disk_gib": 100,
      "host_cpu_percent": 400,
      "host_memory_gib": 12,
      "memory_gib": 8
    },
    "raw_archive_sha256": "a64fa2e74180d5873c73c61224ebcfb9ba2713995e3a26be1a5507b899b38a7c",
    "runtime_archive_sha256": "cb7d6ea34914b4d71958e16eafc8a3220fe9e8cd5b76fa983ef9f648159f4c9b",
    "runtime_binary_sha256": "487f20b84053ce6441c67d4d8af35fc028d3bfc7fcfd2da4309c070930fe46a1",
    "sample_design": "One completed warmup per configuration excluded; six alternating pairs, direct first on odd pairs and nested first on even pairs. No measured failure or sample exclusion.",
    "scope": "Small trusted workloads on one Intel host, one job at a time. Different worker kernels and storage stacks, no CPU pinning or fixed frequency. No isolated causal estimate of KVM overhead, cold-cache storage claim, tail-latency guarantee, concurrency benchmark, or production qualification.",
    "setup_attempts": "Before measurement: corrected noexec staging and stale user-manager group access; enabled guest user lingering; corrected descriptor traversal and dealt with protected direct descriptors. Five diagnostic low-level executions cleaned up but failed instrumentation assertions; no timing from them is included. Corrected trace output filtering produced explicit successful KVM_CREATE_VM and KVM_CREATE_VCPU calls in a separate direct pilot. All measured samples are untraced.",
    "storage": {
      "direct": "host ext4, noatime",
      "nested": "ext4 with relatime and discard, inside QEMU qcow2 overlay on host lab ext4 volume"
    },
    "teardown": {
      "both_final_inventories_empty": true,
      "both_worker_cgroups_absent": true,
      "original_host_worker_preserved": true,
      "outer_vm_stopped": true,
      "recovery_complete": true
    },
    "timezone": "America/Denver",
    "turbo_enabled": true,
    "worker_limits": {
      "cpu_percent": 200,
      "lifetime_seconds": 1800,
      "memory_bytes": 4294967296,
      "swap_bytes": 0,
      "tasks": 192
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        "memory.events": "low 0\nhigh 0\nmax 0\noom 0\noom_kill 0\noom_group_kill 0\nsock_throttled 0\n",
        "memory.max": "4294967296\n",
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        "memory.events": "low 0\nhigh 0\nmax 0\noom 0\noom_kill 0\noom_group_kill 0\nsock_throttled 0\n",
        "memory.max": "4294967296\n",
        "memory.peak": "456212480\n"
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      "elixir": "1.20.4",
      "host_kernel": "7.1.5-76070105-generic",
      "label": "direct",
      "library_version": "0.1.3",
      "low_level": {
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          "guest_ms": 336.183128,
          "iterations": 2000000,
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          "797446 ioctl(14, KVM_CREATE_VCPU, 0)    = 25"
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        "ready_ms": 1798.2010000000002,
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      "otp": "29",
      "outer_cpu_delta": {
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        "throttled_usec": 0
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      "recorded_at": "2026-09-17T02:24:40.689486Z",
      "runtime_version": "1.16.0",
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        "memory.max": "4294967296\n",
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        "memory.events": "low 0\nhigh 0\nmax 0\noom 0\noom_kill 0\noom_group_kill 0\nsock_throttled 0\n",
        "memory.max": "4294967296\n",
        "memory.peak": "456212480\n"
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      "elixir": "1.20.4",
      "host_kernel": "7.1.5-76070105-generic",
      "label": "direct",
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          "guest_ms": 316.350986,
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        "create_ms": 148.706,
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        "kvm_descriptors": [
          "797446 ioctl(13, KVM_CREATE_VM, 0)      = 14",
          "797446 ioctl(14, KVM_CREATE_VCPU, 0)    = 25"
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        "ready_ms": 1768.177,
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      "otp": "29",
      "outer_cpu_delta": {
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        "throttled_usec": 0
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      "recorded_at": "2026-09-17T02:25:28.457934Z",
      "runtime_version": "1.16.0",
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      "counters_before": {
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      "recorded_at": "2026-09-17T02:25:35.140226Z",
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