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+.TH tcl_who.d 1m "$Date:: 2007-10-03 #$" "USER COMMANDS"
+.SH NAME
+tcl_who.d - trace Tcl calls by process using DTrace.
+.SH SYNOPSIS
+.B tcl_who.d
+
+.SH DESCRIPTION
+This traces activity from all Tcl processes on the system with DTrace
+provider support (tcl8.4.16).
+
+Calls is a measure of activity, and is a count of the procedures and
+commands that Tcl called.
+
+The argument list is truncated at 55 characters (up to 80 is easily
+available). To easily read the full argument list, use other system tools;
+on Solaris use "pargs PID".
+.SH OS
+Any
+.SH STABILITY
+Evolving - uses the DTrace Tcl provider, which may change
+as additional features are introduced. Check Tcl/Readme
+to see what version these scripts are based on.
+.SH EXAMPLES
+.TP
+Default output,
+#
+.B tcl_who.d
+.PP
+.SH FIELDS
+.TP
+PID
+Process ID of Tcl
+.TP
+UID
+User ID of the owner
+.TP
+CALLS
+Number of calls made (proc + cmd)
+.TP
+ARGS
+Process name and arguments
+.PP
+.SH DOCUMENTATION
+See the DTraceToolkit for further documentation under the
+Examples, Notes and Docs directories. The example files may be
+especially useful as they aim to demonstrate how to interpret
+the output.
+.SH EXIT
+tcl_who.d will run until Ctrl-C is hit.
+.SH AUTHOR
+Brendan Gregg
+[CA, USA]
+.SH SEE ALSO
+dtrace(1M)