[
  {"pid": 0, "tid": 0, "ph": "M", "name": "process_name", "args": {"name": "p0"}},
  {"pid": 0, "tid": 0, "ph": "M", "name": "thread_name", "args": {"name": "p0t0"}},
  {"pid": 0, "tid": 0, "ph": "X", "name": "alpha", "ts": 0, "dur": 1},
  {"pid": 0, "tid": 1, "ph": "M", "name": "thread_name", "args": {"name": "p0t1"}},
  {"pid": 0, "tid": 1, "ph": "X", "name": "beta", "ts": 0, "dur": 1},

  {"pid": 1, "tid": 0, "ph": "M", "name": "process_name", "args": {"name": "p1"}},
  {"pid": 1, "tid": 0, "ph": "M", "name": "thread_name", "args": {"name": "p1t0"}},
  {"pid": 1, "tid": 0, "ph": "X", "name": "gamma", "ts": 0, "dur": 1},
  {"pid": 1, "tid": 1, "ph": "M", "name": "thread_name", "args": {"name": "p1t1"}},
  {"pid": 1, "tid": 1, "ph": "X", "name": "delta", "ts": 0, "dur": 1},

  {"pid": 2, "tid": 0, "ph": "M", "name": "thread_name", "args": {"name": "p2t0"}},
  {"pid": 2, "tid": 0, "ph": "X", "name": "epsilon", "ts": 0, "dur": 1},
  {"pid": 2, "tid": 1, "ph": "M", "name": "thread_name", "args": {"name": "p2t1"}},
  {"pid": 2, "tid": 1, "ph": "X", "name": "phi", "ts": 0, "dur": 1},

  {"pid": 3, "tid": 0, "ph": "M", "name": "process_name", "args": {"name": "p3"}},
  {"pid": 3, "tid": 0, "ph": "X", "name": "zeta", "ts": 0, "dur": 1},
  {"pid": 3, "tid": 1, "ph": "X", "name": "eta", "ts": 0, "dur": 1}
]