etop

(observer)

Erlang Top is a tool for presenting information about erlang processes similar to the information presented by "top" in UNIX.

etop should be started with the provided scripts etop and getop for text based and graphical presentation respectively. Under Windows the batch files etop.bat and getop.bat can be used.

All interaction with etop when running the graphical presentation should happen via the menus. For the text based presentation the functions described below can be used.

The following configuration parameters exist for etop.

node
The measured node.
Value: atom()
Mandatory
setcookie
Cookie to use for the etop node - must be the same as the cookie on the measured node.
Value: atom()
lines
Number of lines (processes) to display.
Value: integer()
Default: 10
interval
The time interval (in seconds) between each update of the display.
Value: integer()
Default: 5
accumulate
If true the execution time and reductions are accumulated.
Value: boolean()
Default: false
sort
Identifies what information to sort by.
Value: runtime | reductions | memory | msg_q
Default: runtime (reductions if tracing=off)
tracing
etop uses the erlang trace facility, and thus no other tracing is possible on the measured node while etop is running, unless this option is set to off. Also helpful if the etop tracing causes too high load on the measured node. With tracing off, runtime is not measured.
Value: on | off
Default: on

Functions

config(Key,Value) -> Result

  • Result = ok | {error,Reason}
  • Key = lines | interval | accumulate | sort
  • Value = term()

This function is used to change the tool's configuration parameters during runtime. The table above indicates the allowed values for each parameter.

dump(File) -> Result

  • Result = ok | {error,Reason}
  • File = string()

This function dumps the current display to a text file.

stop() -> stop

This function terminates etop.

View Functions