2010-09-15 10:18:18 +00:00
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.\"
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.\" Copyright (c) 2010 The FreeBSD Foundation
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.\" All rights reserved.
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.\"
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.\" This software was developed by Rui Paulo under sponsorship from the
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.\" FreeBSD Foundation.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd September 13, 2010
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.Dt PLOCKSTAT 1
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.Os
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.Sh NAME
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.Nm plockstat
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.Nd Trace pthread lock statistics using DTrace
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.Sh SYNOPSIS
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.Nm
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.Op Fl vACHV
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.Op Fl n Ar count
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.Op Fl s Ar depth
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.Op Fl e Ar secs
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.Op Fl x Ar opt Ns = Ns Ar val
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.Ar command
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.Op arg...
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.Nm
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.Op Fl vACHV
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.Op Fl n Ar count
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.Op Fl s Ar depth
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.Op Fl e Ar secs
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.Op Fl x Ar opt Ns = Ns Ar val
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2012-09-06 19:26:59 +00:00
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.Fl p Ar pid
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2010-09-15 10:18:18 +00:00
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.Sh DESCRIPTION
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The
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.Nm
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utility traces pthread locks (mutexes and rwlocks) and prints statistics about
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them.
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You can use
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.Nm
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to investigate bottlenecks in your software.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl v
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Be verbose.
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.It Fl A
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Print all statistics.
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.It Fl C
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Print commulative statistics (the default).
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.It Fl H
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2010-09-21 21:07:46 +00:00
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Print a histogram.
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2010-09-15 10:18:18 +00:00
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.It Fl V
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Print the DTrace script about to be used to stderr.
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.It Fl n Ar count
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Set the aggregation count for the data set.
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.It Fl s Ar depth
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Set the ustack (userland stack) caller depth.
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.It Fl e Ar secs
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Does nothing at the moment.
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.It Fl x Ar opt Ns = Ns Ar val
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Specify DTrace options.
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See the
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.Xr dtrace 1
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man page for more details.
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.El
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.Sh EXIT STATUS
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.Ex -std
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.Sh SEE ALSO
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.Xr dtrace 1 ,
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.Xr pthread 3
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.Sh HISTORY
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The
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.Nm
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2010-09-21 21:07:46 +00:00
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utility comes from OpenSolaris and was first imported into
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2010-09-15 10:18:18 +00:00
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.Fx 9.0 .
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