freebsd-dev/lib/libpmc/pmc_start.3
Christian Brueffer 026dbd291e 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

78 lines
2.4 KiB
Groff

.\" 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
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.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
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.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" $FreeBSD$
.\"
.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