trace_processor/track_event/track_event_counters.textproto

# Sequence 1 defaults to track for "t1" and extra_counter_values for "c1".
packet {
  trusted_packet_sequence_id: 1
  timestamp: 0
  incremental_state_cleared: true
  track_descriptor {
    uuid: 1
    parent_uuid: 3
    thread {
      pid: 5
      tid: 1
      thread_name: "t1"
    }
  }
  trace_packet_defaults {
    track_event_defaults {
      track_uuid: 1
      extra_counter_track_uuids: 10  # Counter "c1", defined below.
    }
  }
}

# Process track for the thread.
packet {
  trusted_packet_sequence_id: 1
  timestamp: 0
  track_descriptor {
    uuid: 3
    process {
      pid: 5
      process_name: "Browser"
    }
  }
}

# Counter track "c1", a thread-scoped counter for "t1".
packet {
  trusted_packet_sequence_id: 1
  timestamp: 0
  track_descriptor {
    uuid: 10
    parent_uuid: 1
    counter {
      type: 1                # COUNTER_THREAD_TIME_NS.
      unit_multiplier: 1000  # provided in ys.
      is_incremental: true   # use delta encoding.
    }
  }
}

# Sequence 2 has no defaults. Define a new global counter "MySizeCounter".
packet {
  trusted_packet_sequence_id: 2
  timestamp: 0
  incremental_state_cleared: true
  track_descriptor {
    uuid: 11
    name: "MySizeCounter"
    counter {
      unit: 3  # UNIT_SIZE_BYTES.
    }
  }
}

# Should appear on default track "t1" with extra_counter_values for "c1".
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 1000
  track_event {
    categories: "cat"
    name: "event1_on_t1"
    type: 1                     # TYPE_SLICE_BEGIN.
    extra_counter_values: 1000  # First value, so effectively absolute.
  }
}

# End for event above.
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 1100
  track_event {
    type: 2                   # TYPE_SLICE_END.
    extra_counter_values: 10  # Absolute: 1010.
  }
}

# Resetting incremental state on sequence 1 will restart counter at 0.
packet {
  trusted_packet_sequence_id: 1
  timestamp: 2000
  incremental_state_cleared: true
  track_descriptor {
    uuid: 1
    parent_uuid: 3
    thread {
      pid: 5
      tid: 1
      thread_name: "t1"
    }
  }
  trace_packet_defaults {
    track_event_defaults {
      track_uuid: 1
      extra_counter_track_uuids: 10  # Counter "c1", defined below.
    }
  }
}

# Reemit process track for the thread.
packet {
  trusted_packet_sequence_id: 1
  timestamp: 2000
  track_descriptor {
    uuid: 3
    process {
      pid: 5
      process_name: "Browser"
    }
  }
}

# Reemit counter descriptor, too.
packet {
  trusted_packet_sequence_id: 1
  timestamp: 2000
  track_descriptor {
    uuid: 10
    parent_uuid: 1
    counter {
      type: 1                # COUNTER_THREAD_TIME_NS.
      unit_multiplier: 1000  # provided in us.
      is_incremental: true   # use delta encoding.
    }
  }
}

# Should appear on default track "t1" with extra_counter_values for "c1".
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 2000
  track_event {
    categories: "cat"
    name: "event2_on_t1"
    type: 1                     # TYPE_SLICE_BEGIN.
    extra_counter_values: 2000  # First value after reset, so absolute.
  }
}

# Nested value that happens to be emitted at the same timestamp but different
# thread time value.
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 2000
  track_event {
    categories: "cat"
    name: "event3_on_t1"
    type: 1                     # TYPE_SLICE_BEGIN.
    extra_counter_values: 10    # Absolute: 2010
  }
}

# End for event above.
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 2200
  track_event {
    type: 2                   # TYPE_SLICE_END.
    extra_counter_values: 10  # Absolute: 2020.
  }
}

# End for event for "event2_on_t1".
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 2200
  track_event {
    type: 2                   # TYPE_SLICE_END.
    extra_counter_values: 10  # Absolute: 2030.
  }
}

# Counter type event for "MySizeCounter" on sequence 1.
packet {
  trusted_packet_sequence_id: 1
  timestamp: 3000
  track_event {
    track_uuid: 11       # "MySizeCounter".
    type: 4              # TYPE_COUNTER.
    counter_value: 1024  # Absolute.
  }
}

# Counter type event for "MySizeCounter" on sequence 2.
packet {
  trusted_packet_sequence_id: 2
  timestamp: 3100
  track_event {
    track_uuid: 11       # "MySizeCounter".
    type: 4              # TYPE_COUNTER.
    counter_value: 2048  # Absolute.
  }
}

# Override the default extra_counter_values.
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 4000
  track_event {
    categories: "cat"
    name: "event4_on_t1"
    type: 3                        # TYPE_INSTANT.
    extra_counter_track_uuids: 10  # "c1".
    extra_counter_track_uuids: 11  # "MySizeCounter".
    extra_counter_values: 10       # Absolute: 2040.
    extra_counter_values: 1024     # Absolute: 2040.
  }
}

# Sequence 3 defaults to track for "t4" and uses legacy thread time and
# instruction count.
packet {
  trusted_packet_sequence_id: 3
  timestamp: 0
  incremental_state_cleared: true
  track_descriptor {
    uuid: 4
    parent_uuid: 3
    thread {
      pid: 5
      tid: 4
      thread_name: "t4"
    }
  }
  trace_packet_defaults {
    track_event_defaults {
      track_uuid: 4
    }
  }
}

packet {
  trusted_packet_sequence_id: 3
  timestamp: 4000
  track_event {
    categories: "cat"
    name: "event1_on_t3"
    type: 1                        # TYPE_SLICE_BEGIN.
    thread_time_absolute_us: 10
    thread_instruction_count_absolute: 20
  }
}

packet {
  trusted_packet_sequence_id: 3
  timestamp: 4100
  track_event {
    categories: "cat"
    name: "event1_on_t3"
    type: 2                        # TYPE_SLICE_END.
    thread_time_absolute_us: 15
    thread_instruction_count_absolute: 25
  }
}

packet {
  trusted_packet_sequence_id: 1
  timestamp: 4200
  incremental_state_cleared: true
  track_descriptor {
    uuid: 12
    name: "MyDoubleCounter"
    counter {
    }
  }
}

# Floating point counter value.
packet {
  trusted_packet_sequence_id: 1
  timestamp: 4200
  track_event {
    track_uuid: 12                   # "MyDoubleCounter".
    type: 4                          # TYPE_COUNTER.
    double_counter_value: 3.1415926  # Floating point.
  }
}

# Floating point extra counter value.
packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 4300
  track_event {
    categories: "cat"
    name: "float_counter_on_t1"
    type: 3                               # TYPE_INSTANT.
    extra_double_counter_track_uuids: 12  # "MyDoubleCounter".
    extra_double_counter_values: 0.5
  }
}

# Floating point extra counter value with sequence defaults (used together with
# an integer counter).
packet {
  trusted_packet_sequence_id: 1
  timestamp: 4400
  trace_packet_defaults {
    track_event_defaults {
      track_uuid: 1
      extra_counter_track_uuids: 11         # "MySizeCounter"
      extra_double_counter_track_uuids: 12  # "MyDoubleCounter"
    }
  }
}

packet {
  trusted_packet_sequence_id: 1
  sequence_flags: 2  # SEQ_NEEDS_INCREMENTAL_STATE
  timestamp: 4500
  track_event {
    categories: "cat"
    name: "float_counter_on_t1"
    type: 3                        # TYPE_INSTANT.
    extra_counter_values: 4096
    extra_double_counter_values: 2.71828
  }
}