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\" by Mindaugas Rasiukevicius <rmind at NetBSD org>.
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Dd November 2, 2011
Dt CPUSET 3
Os
Sh NAME
Nm cpuset_create ,
Nm cpuset_destroy ,
Nm cpuset_zero ,
Nm cpuset_set ,
Nm cpuset_clr ,
Nm cpuset_isset ,
Nm cpuset_size
Nd dynamic CPU sets
Sh SYNOPSIS
In sched.h
Ft cpuset_t *
Fn cpuset_create "void"
Ft void
Fn cpuset_destroy "cpuset_t *set"
Ft void
Fn cpuset_zero "cpuset_t *set"
Ft int
Fn cpuset_set "cpuid_t cpu" "cpuset_t *set"
Ft int
Fn cpuset_clr "cpuid_t cpu" "cpuset_t *set"
Ft int
Fn cpuset_isset "cpuid_t cpu" "const cpuset_t *set"
Ft size_t
Fn cpuset_size "const cpuset_t *set"
Sh DESCRIPTION
This section describes the functions used to create, set, use and destroy
the dynamic CPU sets.
Pp
This API can be used with the POSIX threads, see
Xr pthread 3
and
Xr affinity 3 .
Pp
The ID of the primary CPU in the system is 0.
Sh FUNCTIONS
Bl -tag -width compact
It Fn cpuset_create
Allocates and initializes a clean CPU-set.
Returns the pointer to the CPU-set, or
Dv NULL
on failure.
It Fn cpuset_destroy set
Destroy the CPU-set specified by
Fa set .
It Fn cpuset_zero set
Makes the CPU-set specified by
Fa set
clean, that is, memory is initialized to zero bytes, and none of
the CPUs set.
It Fn cpuset_set cpu set
Sets the CPU specified by
Fa cpu
in
Fa set .
Returns zero on success, and \-1 if
Fa cpu
is invalid.
It Fn cpuset_clr cpu set
Clears the CPU specified by
Fa cpu
in the CPU-set
Fa set .
Returns zero on success, and \-1 if
Fa cpu
is invalid.
It Fn cpuset_isset cpu set
Checks if CPU specified by
Fa cpu
is set in the CPU-set
Fa set .
Returns the positive number if set, zero if not set, and \-1 if
Fa cpu
is invalid.
It Fn cpuset_size set
Returns the size in bytes of CPU-set specified by
Fa set .
El
Sh SEE ALSO
Xr affinity 3 ,
Xr pset 3 ,
Xr sched 3 ,
Xr schedctl 8 ,
Xr kcpuset 9
Sh HISTORY
The dynamic CPU sets appeared in
Nx 5.0 .

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