[root@linux bench]#  sysbench --test=fileio --file-total-size=10G prepare
sysbench 0.4.12:  multi-threaded system evaluation benchmark

128 files, 81920Kb each, 10240Mb total
Creating files for the test...
[root@linux bench]# sysbench --test=fileio --file-total-size=10G --file-test-mode=rndrw --init-rng=on --max-time=300 --max-requests=0 run
sysbench 0.4.12:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 1
Initializing random number generator from timer.


Extra file open flags: 0
128 files, 80Mb each
10Gb total file size
Block size 16Kb
Number of random requests for random IO: 0
Read/Write ratio for combined random IO test: 1.50
Periodic FSYNC enabled, calling fsync() each 100 requests.
Calling fsync() at the end of test, Enabled.
Using synchronous I/O mode
Doing random r/w test
Threads started!
Time limit exceeded, exiting...
Done.

Operations performed:  33416 Read, 22277 Write, 71168 Other = 126861 Total
Read 522.12Mb  Written 348.08Mb  Total transferred 870.2Mb  (2.9006Mb/sec)
  185.64 Requests/sec executed

Test execution summary:
    total time:                          300.0040s
    total number of events:              55693
    total time taken by event execution: 223.6059
    per-request statistics:
         min:                                  0.00ms
         avg:                                  4.01ms
         max:                                746.19ms
         approx.  95 percentile:              11.24ms

Threads fairness:
    events (avg/stddev):           55693.0000/0.00
    execution time (avg/stddev):   223.6059/0.00