{ "schemaVersion": 1, "kind": "measured-linux-child-io-inheritance", "generatedAt": "2026-10-18T01:06:13.261223+00:00", "sourceSha256": "71c7fae476c86bf2fe967a2390ca77ea15361652a567c2cf75712a6493885872", "license": "MIT", "environment": { "kernel": "6.8.0-146-generic", "machine": "x86_64", "python": "3.12.3", "filesystemMagicLabel": "ext2/ext3", "pageSizeBytes": 4096 }, "parameters": { "repetitionsPerSize": 5, "payloadBytes": [ 0, 1048576, 4194304 ] }, "method": "External observer reads stopped parent and stopped child; child zombie state is checked without reading zombie I/O counters; anonymous shared memory carries only the child PID. Parent waits for stopped child, then WEXITED|WNOWAIT, then reaps. Child fsyncs positive-size payloads before exit.", "limits": [ "One host and single-threaded parent/child, default SIGCHLD disposition.", "Upstream v6.8 source explains the mechanism; running Ubuntu kernel may contain downstream patches.", "Counters are accounting, not measured physical device traffic or latency.", "No grandchild chains, orphan adoption, subreapers, ptrace or concurrent thread reaping tested.", "Child I/O sampled at its last stop before _exit; zombie I/O read is not required (permission denied on the measured host)." ], "observations": [ { "repetition": 1, "payloadBytes": 0, "stages": { "before_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "after_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "exited_wnowait": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null }, "reaped": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null } }, "summary": { "child_last_stopped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "inherited_after_own_task_adjustment": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_delta_by_stage": { "before_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "after_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "exited_wnowait": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "reaped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "retained_child_plus_reaped_parent_wchar": 0 } }, { "repetition": 2, "payloadBytes": 0, "stages": { "before_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "after_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "exited_wnowait": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null }, "reaped": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null } }, "summary": { "child_last_stopped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "inherited_after_own_task_adjustment": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_delta_by_stage": { "before_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "after_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "exited_wnowait": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "reaped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "retained_child_plus_reaped_parent_wchar": 0 } }, { "repetition": 3, "payloadBytes": 0, "stages": { "before_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "after_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "exited_wnowait": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null }, "reaped": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null } }, "summary": { "child_last_stopped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "inherited_after_own_task_adjustment": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_delta_by_stage": { "before_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "after_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "exited_wnowait": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "reaped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "retained_child_plus_reaped_parent_wchar": 0 } }, { "repetition": 4, "payloadBytes": 0, "stages": { "before_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "after_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "exited_wnowait": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null }, "reaped": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null } }, "summary": { "child_last_stopped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "inherited_after_own_task_adjustment": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_delta_by_stage": { "before_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "after_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "exited_wnowait": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "reaped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "retained_child_plus_reaped_parent_wchar": 0 } }, { "repetition": 5, "payloadBytes": 0, "stages": { "before_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "after_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "exited_wnowait": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null }, "reaped": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null } }, "summary": { "child_last_stopped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "inherited_after_own_task_adjustment": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_delta_by_stage": { "before_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "after_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "exited_wnowait": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "reaped": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "retained_child_plus_reaped_parent_wchar": 0 } }, { "repetition": 1, "payloadBytes": 1048576, "stages": { "before_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "after_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 } }, "exited_wnowait": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null }, "reaped": { "parent": { "rchar": 297, "wchar": 1048576, "syscr": 1, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null } }, "summary": { "child_last_stopped": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_reap_delta": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_task_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "inherited_after_own_task_adjustment": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_delta_by_stage": { "before_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "after_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "exited_wnowait": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "reaped": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 } }, "retained_child_plus_reaped_parent_wchar": 2097152 } }, { "repetition": 2, "payloadBytes": 1048576, "stages": { "before_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 } }, "after_write": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 } }, "exited_wnowait": { "parent": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null }, "reaped": { "parent": { "rchar": 297, "wchar": 1048576, "syscr": 1, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_task": { "rchar": 297, "wchar": 0, "syscr": 1, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "child": null } }, "summary": { "child_last_stopped": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_reap_delta": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_task_reap_delta": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "inherited_after_own_task_adjustment": { "rchar": 0, "wchar": 1048576, "syscr": 0, "syscw": 1, "read_bytes": 0, "write_bytes": 1048576, "cancelled_write_bytes": 0 }, "parent_delta_by_stage": { "before_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "after_write": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, "exited_wnowait": { "rchar": 0, "wchar": 0, "syscr": 0, "syscw": 0, "read_bytes": 0, "write_bytes": 0, "cancelled_write_bytes": 0 }, 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