Copyright (c) 2007 Joseph Koshy. All rights reserved.
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$FreeBSD$
.Dd November 25, 2007 .Dt PMC_SET 3 .Os .Sh NAME .Nm pmc_set .Nd set the reload count of a sampling PMC .Sh LIBRARY .Lb libpmc .Sh SYNOPSIS n 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.
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 November 25, 2007 .Dt PMC_SET 3 .Os .Sh NAME .Nm pmc_set .Nd set the reload count of a sampling PMC .Sh LIBRARY .Lb libpmc .Sh SYNOPSIS n 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.
p 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 .
p 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: l -tag -width Er t Bq Er EINVAL The current process did not own a PMC with the specified handle. t Bq Er EBUSY The specified PMC was already running. .El .Sh SEE ALSO .Xr pmc 3 , .Xr hwpmc 4