2 .\" Copyright (c) 2010 The FreeBSD Foundation
3 .\" All rights reserved.
5 .\" This software was developed by Rui Paulo under sponsorship from the
6 .\" FreeBSD Foundation.
8 .\" Redistribution and use in source and binary forms, with or without
9 .\" modification, are permitted provided that the following conditions
11 .\" 1. Redistributions of source code must retain the above copyright
12 .\" notice, this list of conditions and the following disclaimer.
13 .\" 2. Redistributions in binary form must reproduce the above copyright
14 .\" notice, this list of conditions and the following disclaimer in the
15 .\" documentation and/or other materials provided with the distribution.
17 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 .Dd September 13, 2010
34 .Nd Trace pthread lock statistics using DTrace
41 .Op Fl x Ar opt Ns = Ns Ar val
49 .Op Fl x Ar opt Ns = Ns Ar val
54 utility traces pthread locks (mutexes and rwlocks) and prints statistics about
58 to investigate bottlenecks in your software.
60 The following options are available:
61 .Bl -tag -width indent
67 Print commulative statistics (the default).
71 Print the DTrace script about to be used to stderr.
73 Set the aggregation count for the data set.
75 Set the ustack (userland stack) caller depth.
77 Does nothing at the moment.
78 .It Fl x Ar opt Ns = Ns Ar val
79 Specify DTrace options.
82 man page for more details.
92 utility comes from OpenSolaris and was first imported into