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-.\" Copyright (c) 2008 Christian Brueffer
-.\" Copyright (c) 2008 Jeffrey Roberson
-.\" 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.
-.\"
-.Dd April 27, 2022
-.Dt CPUSET_GETAFFINITY 2
-.Os
-.Sh NAME
-.Nm cpuset_getaffinity ,
-.Nm cpuset_setaffinity
-.Nd manage CPU affinity
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In sys/param.h
-.In sys/cpuset.h
-.Ft int
-.Fn cpuset_getaffinity "cpulevel_t level" "cpuwhich_t which" "id_t id" "size_t setsize" "cpuset_t *mask"
-.Ft int
-.Fn cpuset_setaffinity "cpulevel_t level" "cpuwhich_t which" "id_t id" "size_t setsize" "const cpuset_t *mask"
-.Sh DESCRIPTION
-.Fn cpuset_getaffinity
-and
-.Fn cpuset_setaffinity
-allow the manipulation of sets of CPUs available to processes, threads,
-interrupts, jails and other resources.
-These functions may manipulate sets of CPUs that contain many processes
-or per-object anonymous masks that effect only a single object.
-.Pp
-The valid values for the
-.Fa level
-and
-.Fa which
-arguments are documented in
-.Xr cpuset 2 .
-These arguments specify which object and which set of the object we are
-referring to.
-Not all possible combinations are valid.
-For example, only processes may belong to a numbered set accessed by a
-.Fa level
-argument of
-.Dv CPU_LEVEL_CPUSET .
-All resources, however, have a mask which may be manipulated with
-.Dv CPU_LEVEL_WHICH .
-.Pp
-Masks of type
-.Ft cpuset_t
-are composed using the
-.Dv CPU_SET
-macros.
-If the user-supplied mask is not large enough to fit all of the matching CPUs,
-.Fn cpuset_getaffinity
-fails with
-.Er ERANGE .
-Calls to
-.Fn cpuset_setaffinity
-tolerate masks of any size with no restrictions.
-The kernel uses the meaningful part of the mask, where the upper bound is
-the maximum CPU id present in the system.
-If bits for non-existing CPUs are set, calls to
-.Fn cpuset_setaffinity
-fail with
-.Er EINVAL .
-.Pp
-The supplied mask should have a size of
-.Fa setsize
-bytes.
-This size is usually provided by calling
-.Li sizeof(mask)
-which is ultimately determined by the value of
-.Dv CPU_SETSIZE
-as defined in
-.In sys/cpuset.h .
-.Pp
-.Fn cpuset_getaffinity
-retrieves the
-mask from the object specified by
-.Fa level ,
-.Fa which
-and
-.Fa id
-and stores it in the space provided by
-.Fa mask .
-.Pp
-.Fn cpuset_setaffinity
-attempts to set the mask for the object specified by
-.Fa level ,
-.Fa which
-and
-.Fa id
-to the value in
-.Fa mask .
-.Sh RETURN VALUES
-.Rv -std
-.Sh ERRORS
-The following error codes may be set in
-.Va errno :
-.Bl -tag -width Er
-.\" When changing this list, consider updating share/man/man3/pthread_create.3,
-.\" since that function can return any of these errors.
-.It Bq Er EINVAL
-The
-.Fa level
-or
-.Fa which
-argument was not a valid value.
-.It Bq Er EINVAL
-The
-.Fa mask
-argument specified when calling
-.Fn cpuset_setaffinity
-was not a valid value.
-.It Bq Er EDEADLK
-The
-.Fn cpuset_setaffinity
-call would leave a thread without a valid CPU to run on because the set
-does not overlap with the thread's anonymous mask.
-.It Bq Er EFAULT
-The mask pointer passed was invalid.
-.It Bq Er ESRCH
-The object specified by the
-.Fa id
-and
-.Fa which
-arguments could not be found.
-.It Bq Er ERANGE
-The
-.Fa cpusetsize
-was smaller than needed to fit all of the matching CPUs.
-.It Bq Er EPERM
-The calling process did not have the credentials required to complete the
-operation.
-.It Bq Er ECAPMODE
-The calling process attempted to act on a process other than itself, while
-in capability mode.
-See
-.Xr capsicum 4 .
-.El
-.Sh SEE ALSO
-.Xr cpuset 1 ,
-.Xr cpuset 2 ,
-.Xr cpuset_getdomain 2 ,
-.Xr cpuset_getid 2 ,
-.Xr cpuset_setdomain 2 ,
-.Xr cpuset_setid 2 ,
-.Xr pthread_affinity_np 3 ,
-.Xr pthread_attr_affinity_np 3 ,
-.Xr capsicum 4 ,
-.Xr cpuset 9
-.Sh HISTORY
-The
-.Nm
-family of system calls first appeared in
-.Fx 7.1 .
-.Sh AUTHORS
-.An Jeffrey Roberson Aq Mt jeff@FreeBSD.org