freebsd-nq/lib/libpmc/pmc_start.3

.\" Copyright (c) 2007-2008 Joseph Koshy.  All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd September 22, 2008
.Dt PMC_START 3
.Os
.Sh NAME
.Nm pmc_start ,
.Nm pmc_stop
.Nd start and stop a PMC
.Sh LIBRARY
.Lb libpmc
.Sh SYNOPSIS
.In pmc.h
.Ft int
.Fn pmc_start "pmc_id_t pmc"
.Ft int
.Fn pmc_stop "pmc_id_t pmc"
.Sh DESCRIPTION
These functions are used to start and stop a PMC.
.Pp
Function
.Fn pmc_start
starts the PMC specified by argument
.Fa pmc .
If the specified PMC has process scope and has not been attached
to any targets, it will be attached to the current process.
.Pp
Function
.Fn pmc_stop
stops the PMC specified by argument
.Fa pmc .
.Sh RETURN VALUES
.Rv -std
.Sh ERRORS
A call to these functions may fail with the following errors:
.Bl -tag -width Er
.It Bq Er EDOOFUS
Function
.Fn pmc_start
specified a PMC that requires a log file and no log file was
configured.
.It Bq Er EINVAL
The specified PMC is in the process of being deleted.
.It Bq Er EINVAL
Function
.Fn pmc_stop
specified a PMC that was never started.
.It Bq Er ENXIO
The specified PMC had system scope and its associated CPU was disabled or
absent.
.El
.Sh SEE ALSO
.Xr pmc 3 ,
.Xr hwpmc 4
Document changes in behaviour due to sparse CPU numbering support. 2008-09-22 14:31:24 +00:00			`.\" Copyright (c) 2007-2008 Joseph Koshy. All rights reserved.`
Move the following functions into their own manual pages: - pmc_attach(), pmc_detach(). - pmc_capabilities(), pmc_cpuinfo(), pmc_ncpu(), pmc_npmc(), pmc_pmcinfo(), pmc_width(). - pmc_get_driver_stats(). - pmc_get_msr(). - pmc_read(), pmc_rw(), pmc_write(). - pmc_set(). - pmc_start(), pmc_stop(). 2007-11-25 06:38:55 +00:00			`.\"`
			`.\" Redistribution and use in source and binary forms, with or without`
			`.\" modification, are permitted provided that the following conditions`
			`.\" are met:`
			`.\" 1. Redistributions of source code must retain the above copyright`
			`.\" notice, this list of conditions and the following disclaimer.`
			`.\" 2. Redistributions in binary form must reproduce the above copyright`
			`.\" notice, this list of conditions and the following disclaimer in the`
			`.\" documentation and/or other materials provided with the distribution.`
			`.\"`
Switch the license boilerplates to our standard one. Advantages: - Reduces the number of different license versions in the tree - Eliminates a typo - Removes some incorrect author attributions due to c/p - Removes c/p error potential for future pmc manpages Approved by: jkoshy, gnn, rpaulo, fabient (copyright holders) MFC after: 1 week 2012-02-17 11:09:51 +00:00			.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
			`.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE`
			`.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE`
			`.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE`
			`.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL`
			`.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS`
			`.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)`
			`.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT`
			`.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY`
			`.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF`
			`.\" SUCH DAMAGE.`
Move the following functions into their own manual pages: - pmc_attach(), pmc_detach(). - pmc_capabilities(), pmc_cpuinfo(), pmc_ncpu(), pmc_npmc(), pmc_pmcinfo(), pmc_width(). - pmc_get_driver_stats(). - pmc_get_msr(). - pmc_read(), pmc_rw(), pmc_write(). - pmc_set(). - pmc_start(), pmc_stop(). 2007-11-25 06:38:55 +00:00			`.\"`
			`.\" $FreeBSD$`
			`.\"`
Document changes in behaviour due to sparse CPU numbering support. 2008-09-22 14:31:24 +00:00			`.Dd September 22, 2008`
Move the following functions into their own manual pages: - pmc_attach(), pmc_detach(). - pmc_capabilities(), pmc_cpuinfo(), pmc_ncpu(), pmc_npmc(), pmc_pmcinfo(), pmc_width(). - pmc_get_driver_stats(). - pmc_get_msr(). - pmc_read(), pmc_rw(), pmc_write(). - pmc_set(). - pmc_start(), pmc_stop(). 2007-11-25 06:38:55 +00:00			`.Dt PMC_START 3`
mdoc: order prologue macros consistently by Dd/Dt/Os Although groff_mdoc(7) gives another impression, this is the ordering most widely used and also required by mdocml/mandoc. Reviewed by: ru Approved by: philip, ed (mentors) 2010-04-14 19:08:06 +00:00			`.Os`
Move the following functions into their own manual pages: - pmc_attach(), pmc_detach(). - pmc_capabilities(), pmc_cpuinfo(), pmc_ncpu(), pmc_npmc(), pmc_pmcinfo(), pmc_width(). - pmc_get_driver_stats(). - pmc_get_msr(). - pmc_read(), pmc_rw(), pmc_write(). - pmc_set(). - pmc_start(), pmc_stop(). 2007-11-25 06:38:55 +00:00			`.Sh NAME`
			`.Nm pmc_start ,`
			`.Nm pmc_stop`
			`.Nd start and stop a PMC`
			`.Sh LIBRARY`
			`.Lb libpmc`
			`.Sh SYNOPSIS`
			`.In pmc.h`
			`.Ft int`
			`.Fn pmc_start "pmc_id_t pmc"`
			`.Ft int`
			`.Fn pmc_stop "pmc_id_t pmc"`
			`.Sh DESCRIPTION`
			`These functions are used to start and stop a PMC.`
			`.Pp`
			`Function`
			`.Fn pmc_start`
			`starts the PMC specified by argument`
			`.Fa pmc .`
			`If the specified PMC has process scope and has not been attached`
			`to any targets, it will be attached to the current process.`
			`.Pp`
			`Function`
			`.Fn pmc_stop`
			`stops the PMC specified by argument`
			`.Fa pmc .`
			`.Sh RETURN VALUES`
			`.Rv -std`
			`.Sh ERRORS`
			`A call to these functions may fail with the following errors:`
			`.Bl -tag -width Er`
			`.It Bq Er EDOOFUS`
			`Function`
			`.Fn pmc_start`
			`specified a PMC that requires a log file and no log file was`
			`configured.`
			`.It Bq Er EINVAL`
			`The specified PMC is in the process of being deleted.`
			`.It Bq Er EINVAL`
			`Function`
			`.Fn pmc_stop`
			`specified a PMC that was never started.`
			`.It Bq Er ENXIO`
Document changes in behaviour due to sparse CPU numbering support. 2008-09-22 14:31:24 +00:00			`The specified PMC had system scope and its associated CPU was disabled or`
			`absent.`
Move the following functions into their own manual pages: - pmc_attach(), pmc_detach(). - pmc_capabilities(), pmc_cpuinfo(), pmc_ncpu(), pmc_npmc(), pmc_pmcinfo(), pmc_width(). - pmc_get_driver_stats(). - pmc_get_msr(). - pmc_read(), pmc_rw(), pmc_write(). - pmc_set(). - pmc_start(), pmc_stop(). 2007-11-25 06:38:55 +00:00			`.El`
			`.Sh SEE ALSO`
			`.Xr pmc 3 ,`
			`.Xr hwpmc 4`