Performance counter stats for 'du -s -x /' (10 runs):

       2838.761420      task-clock (msec)         #    0.998 CPUs utilized            ( +-  0.20% )
               268      context-switches          #    0.094 K/sec                    ( +-  1.07% )
                 0      cpu-migrations            #    0.000 K/sec                    ( +- 66.67% )
            14,512      page-faults               #    0.005 M/sec                    ( +-  0.00% )
    10,505,896,958      cycles                    #    3.701 GHz                      ( +-  0.20% )
     8,698,903,334      instructions              #    0.83  insn per cycle           ( +-  0.01% )
     1,700,011,206      branches                  #  598.857 M/sec                    ( +-  0.00% )
        25,390,388      branch-misses             #    1.49% of all branches          ( +-  0.07% )

       2.844345185 seconds time elapsed                                          ( +-  0.20% )