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      1 The following is a demonstration of the sar-c.d script.
      2 
      3 
      4 Here we run both sar-c.d and "sar -c 1 100" at the same time, to compare
      5 outputs.
      6 
      7 The DTrace script,
      8 
      9  # ./sar-c.d
     10  Time                 scall/s sread/s swrit/s  fork/s  exec/s  rchar/s  wchar/s
     11  2005 Jun 14 02:40:24    1556      82      71    0.00    0.00    10262    10508
     12  2005 Jun 14 02:40:25    1553      88      75    0.00    0.00    15095    15341
     13  2005 Jun 14 02:40:26    1596      89      76    0.00    0.00    14885    15131
     14  2005 Jun 14 02:40:27    5395     290     154    9.00   10.00   185991    77219
     15  2005 Jun 14 02:40:28    1755      91      98    1.00    1.00    15421    16788
     16  2005 Jun 14 02:40:29    1757     100      91    1.00    1.00    17127    17462
     17  2005 Jun 14 02:40:30    1603      95      80    0.00    0.00    16767    16634
     18  2005 Jun 14 02:40:31   14380      83    2420    1.00    1.00    14556   126461
     19  2005 Jun 14 02:40:32   10573      88    1586    0.00    0.00    14222    87888
     20  2005 Jun 14 02:40:33    1645      87      76    0.00    0.00    15320    15608
     21  2005 Jun 14 02:40:34    2099     167     130    0.00    0.00   126295    74281
     22  2005 Jun 14 02:40:35    1559      79      67    0.00    0.00    11663    11977
     23  [...]
     24 
     25 The original command,
     26 
     27  $ sar -c 1 100
     28  
     29  SunOS jupiter 5.10 Generic i86pc    06/14/2005
     30  
     31  02:40:23 scall/s sread/s swrit/s  fork/s  exec/s rchar/s wchar/s
     32  02:40:24    1549      86      74    0.00    0.00   14799   15040
     33  02:40:25    1552      85      73    0.00    0.00   14475   14719
     34  02:40:26    5479     300     161    9.00   10.00  186755   77983
     35  02:40:27    1725      86      94    0.99    0.99   14819   16172
     36  02:40:28    1596      96      82    0.00    0.00   16521   16762
     37  02:40:29    1716      93      85    1.00    1.00   16395   16730
     38  02:40:30    1579      88      75    0.00    0.00   15324   15192
     39  02:40:32   23036      79    3887    0.99    0.99   10113  193520
     40  02:40:33    1756      94      83    0.00    0.00   14935   15300
     41  02:40:34    2099     165     130    0.00    0.00  125051   73552
     42  02:40:35    1560      82      69    0.00    0.00   15976   16287
     43  [...]
     44 
     45 We can see that both tools are producing similar data.
     46 
     47 The DTrace output lacks the "summary since boot" line, as it is not using
     48 Kstat to fetch this data.
     49 
     50 
     51 The sar-c.d script is not intended itself as a useful program, rather it
     52 is intended as a starting point for other DTrace scripts; a starting point
     53 of familiar statistics to provide the programmer with a "common ground"
     54 of knowledge.
     55 
     56