Module Trace_event.Event

Events.

Each callback in a subscriber corresponds to an event, which can be for example queued somewhere or batched for further processing.

module Sub = Trace_subscriber
type t =
  1. | E_tick
  2. | E_init of {
    1. time_ns : int64;
    }
  3. | E_shutdown of {
    1. time_ns : int64;
    }
  4. | E_message of {
    1. tid : int;
    2. msg : string;
    3. time_ns : int64;
    4. data : (string * Sub.user_data) list;
    }
  5. | E_define_span of {
    1. tid : int;
    2. name : string;
    3. time_ns : int64;
    4. id : Trace_core.span;
    5. fun_name : string option;
    6. data : (string * Sub.user_data) list;
    }
  6. | E_exit_span of {
    1. id : Trace_core.span;
    2. time_ns : int64;
    }
  7. | E_add_data of {
    1. id : Trace_core.span;
    2. data : (string * Sub.user_data) list;
    }
  8. | E_enter_manual_span of {
    1. tid : int;
    2. name : string;
    3. time_ns : int64;
    4. id : Trace_core.trace_id;
    5. flavor : Sub.flavor option;
    6. fun_name : string option;
    7. data : (string * Sub.user_data) list;
    }
  9. | E_exit_manual_span of {
    1. tid : int;
    2. name : string;
    3. time_ns : int64;
    4. flavor : Sub.flavor option;
    5. data : (string * Sub.user_data) list;
    6. id : Trace_core.trace_id;
    }
  10. | E_counter of {
    1. name : string;
    2. tid : int;
    3. time_ns : int64;
    4. n : float;
    }
  11. | E_name_process of {
    1. name : string;
    }
  12. | E_name_thread of {
    1. tid : int;
    2. name : string;
    }
  13. | E_extension_event of {
    1. tid : int;
    2. time_ns : int64;
    3. ext : Trace_core.extension_event;
    }

An event with TEF/fuchsia semantics