{
  "evidence_type": "selected measurement extract",
  "independent_replication": "not established",
  "privacy": "Local paths, run IDs, signing identities, mapped addresses and device/session identifiers omitted.",
  "source_code_included": false,
  "raw_logs_included": false,
  "observed_on": "2026-10-11",
  "environment": "physical M2 Vision Pro and Mac control; exact builds omitted",
  "physical_device": {
    "extended_virtual_addressing_requested": true,
    "increased_memory_limit_requested": false,
    "page_size_bytes": 16384,
    "isolated_16gib": {
      "length": 17179869184,
      "mapped": true,
      "mmap_errno": 0,
      "first_byte_write_verified": true,
      "munmap_status": 0,
      "physical_bytes_touched": 1
    },
    "isolated_64gib": {
      "length": 68719476736,
      "mapped": true,
      "mmap_errno": 0,
      "first_byte_write_verified": true,
      "munmap_status": 0,
      "physical_bytes_touched": 1
    },
    "held_reservation_sequences": {
      "reservation_sequence_16_64_32_gib": {
        "successful_mappings_held": true,
        "steps": [
          {
            "length": 17179869184,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 68719476736,
            "mapped": 0,
            "mmap_errno": 12,
            "one_byte_write_read_verified": false
          },
          {
            "length": 34359738368,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          }
        ]
      },
      "reservation_sequence_64_16_32_gib": {
        "successful_mappings_held": true,
        "steps": [
          {
            "length": 68719476736,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 17179869184,
            "mapped": 0,
            "mmap_errno": 12,
            "one_byte_write_read_verified": false
          },
          {
            "length": 34359738368,
            "mapped": 0,
            "mmap_errno": 12,
            "one_byte_write_read_verified": false
          }
        ]
      }
    },
    "ordinary_hint_sequences": {
      "reservation_hint_4gib_sequence_16_64_32_gib": {
        "successful_mappings_held": true,
        "steps": [
          {
            "length": 17179869184,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 68719476736,
            "mapped": 0,
            "mmap_errno": 12,
            "one_byte_write_read_verified": false
          },
          {
            "length": 34359738368,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          }
        ]
      },
      "reservation_hint_64gib_sequence_16_64_32_gib": {
        "successful_mappings_held": true,
        "steps": [
          {
            "length": 17179869184,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 68719476736,
            "mapped": 0,
            "mmap_errno": 12,
            "one_byte_write_read_verified": false
          },
          {
            "length": 34359738368,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          }
        ]
      }
    }
  },
  "mac_control": {
    "held_reservation_sequences": {
      "reservation_sequence_16_64_32_gib": {
        "successful_mappings_held": true,
        "steps": [
          {
            "length": 17179869184,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 68719476736,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 34359738368,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          }
        ]
      },
      "reservation_sequence_64_16_32_gib": {
        "successful_mappings_held": true,
        "steps": [
          {
            "length": 68719476736,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 17179869184,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          },
          {
            "length": 34359738368,
            "mapped": 1,
            "mmap_errno": 0,
            "one_byte_write_read_verified": true,
            "munmap_status": 0,
            "munmap_errno": 0
          }
        ]
      }
    }
  },
  "limitations": [
    "A bounded access can fault one physical page; reservation is not physical RAM consumption",
    "Exact global address ceiling and cause not established",
    "Not a gameplay or other-hardware compatibility test"
  ],
  "isolated_controls": {
    "physical_default": {
      "extended_virtual_addressing_requested": false,
      "control_8mib": {
        "length": 8388608,
        "mapped": true,
        "mmap_errno": 0,
        "first_byte_write_verified": true,
        "munmap_status": 0,
        "physical_bytes_touched": 1
      },
      "request_16gib": {
        "length": 17179869184,
        "mapped": false,
        "mmap_errno": 12,
        "first_byte_write_verified": false,
        "munmap_status": 0,
        "physical_bytes_touched": 0
      }
    },
    "physical_extended": {
      "extended_virtual_addressing_requested": true,
      "control_8mib": {
        "length": 8388608,
        "mapped": true,
        "mmap_errno": 0,
        "first_byte_write_verified": true,
        "munmap_status": 0,
        "physical_bytes_touched": 1
      },
      "request_16gib": {
        "length": 17179869184,
        "mapped": true,
        "mmap_errno": 0,
        "first_byte_write_verified": true,
        "munmap_status": 0,
        "physical_bytes_touched": 1
      }
    },
    "simulator": {
      "extended_virtual_addressing_requested": false,
      "control_8mib": {
        "length": 8388608,
        "mapped": true,
        "mmap_errno": 0,
        "first_byte_write_verified": true,
        "munmap_status": 0,
        "physical_bytes_touched": 1
      },
      "request_16gib": {
        "length": 17179869184,
        "mapped": true,
        "mmap_errno": 0,
        "first_byte_write_verified": true,
        "munmap_status": 0,
        "physical_bytes_touched": 1
      }
    },
    "mac": [
      {
        "length": 8388608,
        "mapped": true,
        "mmap_errno": 0,
        "munmap_status": 0
      },
      {
        "length": 17179869184,
        "mapped": true,
        "mmap_errno": 0,
        "munmap_status": 0
      }
    ]
  }
}