mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
74 lines
2.4 KiB
Groff
74 lines
2.4 KiB
Groff
|
.\" Copyright (c) 2007 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 Joseph Koshy ``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 Joseph Koshy 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 November 25, 2007
|
||
|
|
.Os
|
||
|
|
.Dt PMC_SET 3
|
||
|
|
.Sh NAME
|
||
|
|
.Nm pmc_set
|
||
|
|
.Nd set the reload count of a sampling PMC
|
||
|
|
.Sh LIBRARY
|
||
|
|
.Lb libpmc
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.In pmc.h
|
||
|
|
.Ft int
|
||
|
|
.Fn pmc_set "pmc_id_t pmc" "pmc_value_t value"
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
Function
|
||
|
|
.Fn pmc_set
|
||
|
|
is used to set the reload value of sampling PMCs.
|
||
|
|
Argument
|
||
|
|
.Fa pmc
|
||
|
|
specified the handle a previously allocate sampling mode PMC.
|
||
|
|
Argument
|
||
|
|
.Fa value
|
||
|
|
specifies the reload count.
|
||
|
|
.Pp
|
||
|
|
Sampling PMCs will interrupt the CPU after the number of
|
||
|
|
hardware events specified by the reload count are seen.
|
||
|
|
After the sampling interrupt is processed the underlying hardware will
|
||
|
|
be reloaded with the specified count and the hardware
|
||
|
|
automatically restarted by
|
||
|
|
.Xr hwpmc 4 .
|
||
|
|
.Pp
|
||
|
|
Function
|
||
|
|
.Fn pmc_set
|
||
|
|
should be called on PMC in a quiescent state.
|
||
|
|
.Sh RETURN VALUES
|
||
|
|
.Rv -std pmc_set
|
||
|
|
.Sh ERRORS
|
||
|
|
A call to
|
||
|
|
.Fn pmc_set
|
||
|
|
may fail with the following errors:
|
||
|
|
.Bl -tag -width Er
|
||
|
|
.It Bq Er EINVAL
|
||
|
|
The current process did not own a PMC with the specified handle.
|
||
|
|
.It Bq Er EBUSY
|
||
|
|
The specified PMC was already running.
|
||
|
|
.El
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr pmc 3 ,
|
||
|
|
.Xr hwpmc 4
|