fddist man page on MacOSX

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fddist(1m)			 USER COMMANDS			    fddist(1m)

NAME
       fddist - file descriptor usage distributions. Uses DTrace.

SYNOPSIS
       fddist [-r|-w]

DESCRIPTION
       This prints distributions for read and write events by file descriptor,
       by process. This can be used  to	 determine  which  file	 descriptor  a
       process is doing the most I/O with.

       Since  this  uses  DTrace, only users with root privileges can run this
       command.

OPTIONS
       -r     reads only

       -w     writes only

EXAMPLES
       Sample both read and write activity,
	      # fddist

       Sample reads only,
	      # fddist -r

FIELDS
       EXEC   process name

       PID    process ID

       value  file descriptor

       count  number of events

BASED ON
       /usr/demo/dtrace/lquantize.d

DOCUMENTATION
       DTrace Guide "Aggregations" chapter (docs.sun.com)

       See the DTraceToolkit for further documentation under the  Docs	direc‐
       tory. The DTraceToolkit docs may include full worked examples with ver‐
       bose descriptions explaining the output.

EXIT
       fddist will sample until Ctrl-C is hit.

SEE ALSO
       dtrace(1M)

version 0.70			 Jun 08, 2005			    fddist(1m)
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