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

       1754.562690      task-clock (msec)         #    0.997 CPUs utilized            ( +-  0.14% )
               117      context-switches          #    0.067 K/sec                    ( +-  3.58% )
                 0      cpu-migrations            #    0.000 K/sec                    ( +- 44.72% )
            14,500      page-faults               #    0.008 M/sec                    ( +-  0.00% )
     6,464,659,367      cycles                    #    3.684 GHz                      ( +-  0.13% )
     8,576,263,011      instructions              #    1.33  insn per cycle           ( +-  0.01% )
     1,606,838,334      branches                  #  915.806 M/sec                    ( +-  0.01% )
        25,391,014      branch-misses             #    1.58% of all branches          ( +-  0.11% )

       1.760244453 seconds time elapsed                                          ( +-  0.13% )