.TH dappprof 1m "May 14, 2005" "version 1.10" "USER COMMANDS"
.SH NAME
dappprof \- profile user and lib function usage. Uses DTrace.
.SH SYNOPSIS
.B dappprof
[\-acehoTU] [\-u lib] { \-p PID | command }
.SH DESCRIPTION
dappprof prints details on user and library call times for processes
as a summary style aggragation. By default the user fuctions are
traced, options can be used to trace library activity. Output can
include function counts, elapsed times and on cpu times.
The elapsed times are interesting, to help identify functions
that take some time to complete (during which the process may
have slept). CPU time helps us identify syscalls that
are consuming CPU cycles to run.
Since this uses DTrace, only users with root privileges can run this command.
.SH OPTIONS
.TP
\-a
print all data
.TP
\-c
print function counts
.TP
\-e
print elapsed times, ns
.TP
\-o
print CPU times, ns
.TP
\-T
print totals
.TP
\-p PID
examine this PID
.TP
\-u lib
trace this library instead
.TP
\-U
trace all library and user functions
.PP
.SH EXAMPLES
.TP
run and examine the "df \-h" command,
#
.B dappprof
df \-h
.PP
.TP
print elapsed times, on-cpu times and counts for "df \-h",
#
.B dappprof
-ceo df \-h
.TP
print elapsed times for PID 1871,
#
.B dappprof
\-p 1871
.PP
.TP
print all data for PID 1871,
#
.B dappprof
\-ap 1871
.PP
.SH FIELDS
.TP
CALL
Function call name
.TP
ELAPSED
Total elapsed time, nanoseconds
.TP
CPU
Total on-cpu time, nanoseconds
.TP
COUNT
Number of occurrences
.SH DOCUMENTATION
See the DTraceToolkit for further documentation under the
Docs directory. The DTraceToolkit docs may include full worked
examples with verbose descriptions explaining the output.
.SH EXIT
dappprof will sample until Ctrl\-C is hit.
.SH AUTHOR
Brendan Gregg
[Sydney, Australia]
.SH SEE ALSO
dapptrace(1M), dtrace(1M), apptrace(1)