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

       2269.713142      task-clock (msec)         #    0.997 CPUs utilized            ( +-  0.07% )
               625      context-switches          #    0.275 K/sec                    ( +-  1.61% )
                 0      cpu-migrations            #    0.000 K/sec                  
            14,500      page-faults               #    0.006 M/sec                    ( +-  0.00% )
     8,352,933,711      cycles                    #    3.680 GHz                      ( +-  0.06% )
     8,726,844,696      instructions              #    1.04  insn per cycle           ( +-  0.01% )
     1,701,309,978      branches                  #  749.570 M/sec                    ( +-  0.01% )
        25,423,400      branch-misses             #    1.49% of all branches          ( +-  0.05% )

       2.276401018 seconds time elapsed                                          ( +-  0.07% )