$ cat > syscall.lua <<EOF
ffi.cdef("long syscall(long, long, long, long);")
function event()
  ffi.C.syscall(0, 0, 0, 0)
end
EOF

$ sysbench syscall.lua run
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)

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

Initializing worker threads...

Threads started!

Throughput:
    events/s (eps):                      5046112.7918
    time elapsed:                        10.0002s
    total number of events:              50462252

Latency (ms):
         min:                                  0.00
         avg:                                  0.00
         max:                                  0.97
         95th percentile:                      0.00
         sum:                               3337.46

Threads fairness:
    events (avg/stddev):           50462252.0000/0.00
    execution time (avg/stddev):   3.3375/0.00