Prints output like this:

Collected 36843 samples spanning 8.85 s

Tracepoint statistics:

  name              count
  ----              -----
  sched_wait        18420
  sched_wait_ret    18423

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>