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76 lines
2.4 KiB
Groff
76 lines
2.4 KiB
Groff
.\" Copyright (c) 2007-2008 Joseph Koshy. All rights reserved.
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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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.Dd September 22, 2008
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.Dt PMC_START 3
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.Os
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.Sh NAME
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.Nm pmc_start ,
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.Nm pmc_stop
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.Nd start and stop a PMC
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.Sh LIBRARY
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.Lb libpmc
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.Sh SYNOPSIS
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.In pmc.h
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.Ft int
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.Fn pmc_start "pmc_id_t pmc"
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.Ft int
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.Fn pmc_stop "pmc_id_t pmc"
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.Sh DESCRIPTION
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These functions are used to start and stop a PMC.
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.Pp
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Function
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.Fn pmc_start
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starts the PMC specified by argument
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.Fa pmc .
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If the specified PMC has process scope and has not been attached
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to any targets, it will be attached to the current process.
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.Pp
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Function
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.Fn pmc_stop
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stops the PMC specified by argument
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.Fa pmc .
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.Sh RETURN VALUES
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.Rv -std
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.Sh ERRORS
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A call to these functions may fail with the following errors:
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.Bl -tag -width Er
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.It Bq Er EDOOFUS
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Function
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.Fn pmc_start
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specified a PMC that requires a log file and no log file was
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configured.
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.It Bq Er EINVAL
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The specified PMC is in the process of being deleted.
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.It Bq Er EINVAL
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Function
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.Fn pmc_stop
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specified a PMC that was never started.
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.It Bq Er ENXIO
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The specified PMC had system scope and its associated CPU was disabled or
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absent.
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.El
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.Sh SEE ALSO
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.Xr pmc 3 ,
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.Xr hwpmc 4
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