et_viewer

Displays a sequence chart for trace events (messages/actions)

Functions

file(FileName) -> {ok, ViewerPid} | {error, Reason}

  • FileName() = string()
  • ViewerPid = pid()
  • Reason = term()

Start a new event viewer and a corresponding collector and load them with trace events from a trace file.

start() -> ok

Simplified start of a sequence chart viewer with global tracing activated.

Convenient to be used from the command line (erl -s et_viewer).

start(Options) -> ok

Start of a sequence chart viewer without linking to the parent process.

start_link(Options) -> {ok, ViewerPid} | {error, Reason}

  • Options = [option() | collector_option()]
  • option() = {parent_pid, extended_pid()} | {title, term()} | {detail_level, detail_level()} | {is_suspended, boolean()} | {scale, integer()} | {width, integer()} | {height, integer()} | {collector_pid, extended_pid()} | {event_order, event_order()} | {active_filter, atom()} | {max_actors, extended_integer()} | {trace_pattern, et_collector_trace_pattern()} | {trace_port, et_collector_trace_port()} | {trace_global, et_collector_trace_global()} | {trace_client, et_collector_trace_client()} | {dict_insert, {filter, filter_name()}, event_filter_fun()} | {dict_insert, et_collector_dict_key(), et_collector_dict_val()} | {dict_delete, {filter, filter_name()}} | {dict_delete, et_collector_dict_key()} | {actors, actors()} | {first_event, first_key()} | {hide_unknown, boolean()} | {hide_actions, boolean()} | {display_mode, display_mode()}
  • extended_pid() = pid() | undefined
  • detail_level() = min | max | integer(X) when X >=0, X =< 100
  • event_order() = trace_ts | event_ts
  • extended_integer() = integer() | infinity
  • display_mode() = all | {search_actors, direction(), first_key(), actors()}
  • direction() = forward | reverse
  • first_key() = event_key()
  • actors() = [term()]
  • filter_name() = atom()
  • filter_fun() = fun(Event) -> false | true | {true, NewEvent}
  • Event = NewEvent = record(event)
  • ViewerPid = pid()
  • Reason = term()

Start a sequence chart viewer for trace events (messages/actions)

A filter_fun() takes an event record as sole argument and returns false | true | {true, NewEvent}.

If the collector_pid is undefined a new et_collector will be started with the following parameter settings: parent_pid, event_order, trace_global, trace_pattern, trace_port, trace_max_queue, trace_client, dict_insert and dict_delete. The new et_viewer will register itself as an et_collector subscriber.

Default values:

parent_pid - self(). title - "et_viewer". detail_level - max. is_suspended - false. scale - 2. width - 800. height - 600. collector_pid - undefined. event_order - trace_ts. active_filter - collector. max_actors - 5. actors - ["UNKNOWN"]. first_event - first. hide_unknown - false. hide_actions - false. display_mode - all.

get_collector_pid(ViewerPid) -> CollectorPid

  • ViewerPid = pid()
  • CollectorPid = pid()

Returns the identifier of the collector process.

stop(ViewerPid) -> ok

  • ViewerPid = pid()

Stops a viewer process.

View Functions