native ps dtrace

[root@olive-sdc ~]# dtrace -n entry'/progenyof($target)/{@[probefunc] = count()}' -c 'ps'
dtrace: description 'entry' matched 911 probes
  PID TTY         TIME CMD
45890 pts/8       0:00 bash
45941 pts/8       0:00 ps
45940 pts/8       0:00 dtrace
dtrace: pid 45941 has exited

  access                                                            1
  exece                                                             1
  fcntl                                                             1
  getuid                                                            1
  ioctl                                                             1
  openat                                                            1
  rexit                                                             1
  sigpending                                                        1
  zone                                                              1
  getdents                                                          2
  getpid                                                            2
  getrlimit                                                         2
  munmap                                                            2
  sysi86                                                            2
  systeminfo                                                        2
  sysconfig                                                         3
  setcontext                                                        4
  write                                                             4
  brk                                                               8
  fstat                                                            22
  mmapobj                                                          27
  memcntl                                                          28
  resolvepath                                                      29
  lwp_cond_broadcast                                               30
  mmap                                                             43
  read                                                             46
  stat                                                             61
  close                                                            83
  open                                                             83