The following is a demonstration of the writebytes.d script,
Here the writebytes.d script is run for a few seconds, then Ctrl-C is hit,
# writebytes.d
dtrace: description 'sysinfo:::writech ' matched 4 probes
^C
dtrace 1
gnome-settings-d 8
xscreensaver 8
gnome-panel 8
nautilus 8
date 29
wnck-applet 120
bash 210
mozilla-bin 1497
ls 1947
metacity 3172
Xorg 7424
gnome-terminal 51955
In this interval the gnome-terminal command has successfully written 51.9 Kb,
while Xorg has written 7424 bytes.