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NAME

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

DESCRIPTION

       etop should be started with the provided  scripts  etop  and  getop  for  text  based  and
       graphical  presentation  respectively. This will start a hidden erlang node which connects
       to the node to be measured. The measured node is given  with  the  -node  option.  If  the
       measured  node has a different cookie than the default cookie for the user who invokes the
       script, the cookie must be explicitly given witht the -setcookie option.

       Under Windows the batch files etop.bat and getop.bat can be used.

       The following configuration parameters exist for the etop tool. When executing the etop or
       getop  scripts,  these  parameters  can be given as command line options, e.g. getop -node
       testnode@myhost -setcookie MyCookie.

         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

       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.

       See the user's guide for more information about the etop tool.

EXPORTS

       start() -> ok

              This function starts etop. Note that etop is preferably started with the  etop  and
              getop scripts

       start(Options) -> ok

              Types:

                 Options = [Option]
                 Option = {Key, Value}
                 Key = atom()
                 Value = term()

              This function starts etop. Use help/0 to see a description of the possible options.

       help() -> ok

              This function prints the help of etop and its options.

       config(Key,Value) -> Result

              Types:

                 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

              Types:

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

              This function dumps the current display to a text file.

       stop() -> stop

              This function terminates etop.