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.
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19 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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24 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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31 .Dd September 13, 2010
36 .Nd Trace pthread lock statistics using DTrace
43 .Op Fl x Ar opt Ns = Ns Ar val
51 .Op Fl x Ar opt Ns = Ns Ar val
56 utility traces pthread locks (mutexes and rwlocks) and prints statistics about
60 to investigate bottlenecks in your software.
62 The following options are available:
63 .Bl -tag -width indent
69 Print commulative statistics (the default).
73 Print the DTrace script about to be used to stderr.
75 Set the aggregation count for the data set.
77 Set the ustack (userland stack) caller depth.
79 Does nothing at the moment.
80 .It Fl x Ar opt Ns = Ns Ar val
81 Specify DTrace options.
84 man page for more details.
94 utility comes from OpenSolaris and was first imported into