gernot@tintenfass:~# dtrace -n 'syscall:::entry { @[execname]=count()}'
dtrace: description 'syscall:::entry ' matched 234 probes
^C

  idmapd                                                            1
  inetd                                                             1
  nscd                                                              1
  svc.configd                                                       1
  svc.startd                                                        1
  fmd                                                               2
  gconfd-2                                                          3
  at-spi-registryd                                                  5
  mdnsd                                                             6
  devfsadm                                                          8
  sendmail                                                         10
  smbd                                                             10
  gnome-power-mana                                                 14
  sshd                                                             19
  metacity                                                         23
  ntpd                                                             45
  gdm-simple-greet                                                116
  Xorg                                                            323
  dtrace                                                         2633