sysbench --test=cpu --cpu-max-prime=20000 run
sysbench 0.4.12:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 1

Doing CPU performance benchmark

Threads started!
Done.

Maximum prime number checked in CPU test: 20000


Test execution summary:
    total time:                          628.8730s
    total number of events:              10000
    total time taken by event execution: 628.8369
    per-request statistics:
         min:                                 60.18ms
         avg:                                 62.88ms
         max:                                193.09ms
         approx.  95 percentile:              88.40ms

Threads fairness:
    events (avg/stddev):           10000.0000/0.00
    execution time (avg/stddev):   628.8369/0.00

sysbench --test=cpu --cpu-max-prime=20000 run
sysbench 0.4.12:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 1

Doing CPU performance benchmark

Threads started!
Done.

Maximum prime number checked in CPU test: 20000


Test execution summary:
    total time:                          635.8420s
    total number of events:              10000
    total time taken by event execution: 635.7948
    per-request statistics:
         min:                                 60.21ms
         avg:                                 63.58ms
         max:                                234.14ms
         approx.  95 percentile:              88.06ms

Threads fairness:
    events (avg/stddev):           10000.0000/0.00
    execution time (avg/stddev):   635.7948/0.00