root@sysbench-test-do:~# for each in 1 2 4 8 16; do sysbench --test=cpu --cpu-max-prime=20000 --num-threads=$each run; done
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

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


Prime numbers limit: 20000

Initializing worker threads...

Threads started!

CPU speed:
    events per second:   467.67

General statistics:
    total time:                          10.0012s
    total number of events:              4678

Latency (ms):
         min:                                  1.96
         avg:                                  2.14
         max:                                  2.39
         95th percentile:                      2.14
         sum:                               9999.80

Threads fairness:
    events (avg/stddev):           4678.0000/0.00
    execution time (avg/stddev):   9.9998/0.00

WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

Running the test with following options:
Number of threads: 2
Initializing random number generator from current time


Prime numbers limit: 20000

Initializing worker threads...

Threads started!

CPU speed:
    events per second:   936.02

General statistics:
    total time:                          10.0004s
    total number of events:              9362

Latency (ms):
         min:                                  1.96
         avg:                                  2.14
         max:                                  2.60
         95th percentile:                      2.14
         sum:                              19998.04

Threads fairness:
    events (avg/stddev):           4681.0000/3.00
    execution time (avg/stddev):   9.9990/0.00

WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

Running the test with following options:
Number of threads: 4
Initializing random number generator from current time


Prime numbers limit: 20000

Initializing worker threads...

Threads started!

CPU speed:
    events per second:   933.95

General statistics:
    total time:                          10.0024s
    total number of events:              9343

Latency (ms):
         min:                                  1.99
         avg:                                  4.28
         max:                                 22.14
         95th percentile:                     10.09
         sum:                              39986.14

Threads fairness:
    events (avg/stddev):           2335.7500/7.08
    execution time (avg/stddev):   9.9965/0.01

WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

Running the test with following options:
Number of threads: 8
Initializing random number generator from current time


Prime numbers limit: 20000

Initializing worker threads...

Threads started!

CPU speed:
    events per second:   933.84

General statistics:
    total time:                          10.0046s
    total number of events:              9344

Latency (ms):
         min:                                  1.96
         avg:                                  8.55
         max:                                 46.14
         95th percentile:                     14.21
         sum:                              79895.23

Threads fairness:
    events (avg/stddev):           1168.0000/6.20
    execution time (avg/stddev):   9.9869/0.01

WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

Running the test with following options:
Number of threads: 16
Initializing random number generator from current time


Prime numbers limit: 20000

Initializing worker threads...

Threads started!

CPU speed:
    events per second:   934.35

General statistics:
    total time:                          10.0088s
    total number of events:              9353

Latency (ms):
         min:                                  2.00
         avg:                                 17.06
         max:                                 62.16
         95th percentile:                     30.26
         sum:                             159526.97

Threads fairness:
    events (avg/stddev):           584.5625/6.36
    execution time (avg/stddev):   9.9704/0.02

root@sysbench-test-do:~#