1The following is a demonstration of the fddist command, 2 3 4Here fddist is run for a few seconds on an idle workstation, 5 6 Tracing reads and writes... Hit Ctrl-C to end. 7 ^C 8 EXEC: dtrace PID: 3288 9 10 value ------------- Distribution ------------- count 11 0 | 0 12 1 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 2 13 2 | 0 14 15 EXEC: mozilla-bin PID: 1659 16 17 value ------------- Distribution ------------- count 18 3 | 0 19 4 |@@@@@@@@@@ 28 20 5 | 0 21 6 |@@@@@@@@@@@@@@@ 40 22 7 |@@@@@@@@@@@@@@@ 40 23 8 | 0 24 25 EXEC: Xorg PID: 1532 26 27 value ------------- Distribution ------------- count 28 22 | 0 29 23 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 57 30 24 | 0 31 32The above displays the usage pattern for process file descriptors. 33We can see the Xorg process (PID 1532) has made 57 reads or writes to 34it's file descriptor 23. 35 36The pfiles(1) command can be used to help determine what file 37descriptor 23 actually is. 38 39