The following is an example of running tcl_who.d.
The output produces four fields of interest in tracing tcl calls by process.
Here we see it running while Code/Tcl/func_slow.tcl and Code/Tcl/func_abc.tcl
are executed.
Tracing... Hit Ctrl-C to end.
^C
PID UID CALLS ARGS
16063 100 83 ./tclsh scripts/func_slow.tcl
16061 100 86 ./tclsh scripts/func_abc.tcl
CALLS is a measure of activity, and is a count of the procedures and commands
that Tcl called. The ARGS column shows the process name and arguments given
for a particular PID in order to identify the particular Tcl code involved.