$ sar -c
Solaris mysys Solaris sun4c    08/22/96
14:28:12 scall/s sread/s swrit/s  fork/s  exec/s rchar/s wchar/s
14:29:12      17       2       2    0.28    0.28    2527    1542
14:30:12      25       2       1    0.50    0.47    1624     295
14:31:12      21       2       2    0.35    0.35    1812     703
 
Average       21       2       2    0.38    0.37    1987     847