plg.tcl

Description

plg.tcl (Packet Loss Grapher)  is a little utility for tracking the robustness of a network connection in "real time".  It displays a graph representing ping response and packet loss to a particular host.

Screen Shots

 

The Main Window

Usage

After launching plg.tcl, you should enter the address of the host you would like to ping in the top entry field.  Secondly, click the "start" button and that's it.  plg.tcl will now show ping statistics for that host until you click the "stop" button.

Command Line Args

There are currently no command line arguments for plg.tcl.

Key Bindings

 

<Double-Escape>	Exit
<Enter>	Start ping statistics gathering
<Escape> (when gathering stats)	Stop ping statistics gathering
<Escape> (when not gathering stats)	Clear host entry field

Requirements

• The tcl.prehiti.net libraries
• The nwidg.tcl library for simple widget layout.
• Tcl/Tk 8.2 or greater
• IncrTcl 3.0 or greater
• A ping executable in your path with the kind of output plg.tcl expects (plg.tcl searches for the regular expression "time[=<>](\d*)" to find a number representing ping latency in each line of ping's output)

Todo List
 

Bugs

• Each time ping is called externally, the application seems to leak 4KB of memory.  This might cause plg.tcl to freak out after running for a long time.  The memory usage might level out over time.

General

• Expose more of the internal configuration parameters to the command line.