3 files changed, 201 insertions, 0 deletions

diff --git a/lib/libc/sys/Makefile.inc b/lib/libc/sys/Makefile.inc
index 5162563136d2b..e672b69e7a432 100644
--- a/lib/libc/sys/Makefile.inc
+++ b/lib/libc/sys/Makefile.inc
@@ -235,6 +235,7 @@ MAN+=	abort2.2 \
 	nanosleep.2 \
 	nfssvc.2 \
 	ntp_adjtime.2 \
+	numa_getaffinity.2 \
 	open.2 \
 	pathconf.2 \
 	pdfork.2 \
@@ -395,6 +396,7 @@ MLINKS+=mount.2 nmount.2 \
 MLINKS+=mq_receive.2 mq_timedreceive.2
 MLINKS+=mq_send.2 mq_timedsend.2
 MLINKS+=ntp_adjtime.2 ntp_gettime.2
+MLINKS+=numa_getaffinity.2 numa_setaffinity.2
 MLINKS+=open.2 openat.2
 MLINKS+=pathconf.2 fpathconf.2
 MLINKS+=pathconf.2 lpathconf.2
diff --git a/lib/libc/sys/Symbol.map b/lib/libc/sys/Symbol.map
index 194aa5bf0999f..a3a613e24a443 100644
--- a/lib/libc/sys/Symbol.map
+++ b/lib/libc/sys/Symbol.map
@@ -400,6 +400,8 @@ FBSD_1.4 {
 	futimens;
 	ppoll;
 	utimensat;
+	numa_setaffinity;
+	numa_getaffinity;
 };
 
 FBSDprivate_1.0 {
diff --git a/lib/libc/sys/numa_getaffinity.2 b/lib/libc/sys/numa_getaffinity.2
new file mode 100644
index 0000000000000..efb78e988210b
--- /dev/null
+++ b/lib/libc/sys/numa_getaffinity.2
@@ -0,0 +1,197 @@
+.\" Copyright (c) 2008 Christian Brueffer
+.\" Copyright (c) 2008 Jeffrey Roberson
+.\" Copyright (c) 2015 Adrian Chadd
+.\" 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd May 7, 2015
+.Dt NUMA_GETAFFINITY 2
+.Os
+.Sh NAME
+.Nm numa_getaffinity ,
+.Nm numa_setaffinity
+.Nd manage NUMA affinity
+.Sh LIBRARY
+.Lb libc
+.Sh SYNOPSIS
+.In sys/param.h
+.In sys/numa.h
+.Ft int
+.Fn numa_getaffinity "cpuwhich_t which" "id_t id" "struct vm_domain_policy_entry *policy"
+.Ft int
+.Fn numa_setaffinity "cpuwhich_t which" "id_t id" "const struct vm_domain_policy_entry *policy"
+.Sh DESCRIPTION
+.Fn numa_getaffinity
+and
+.Fn numa_setaffinity
+allow the manipulation of NUMA policies available to processes and threads.
+These functions may manipulate NUMA policies that contain many processes
+or affect only a single object.
+.Pp
+Valid values for the
+.Fa which
+argument are documented in
+.Xr cpuset 2 .
+These arguments specify which object set are used.
+Only
+.Dv CPU_WHICH_TID
+and
+.Dv CPU_WHICH_PID
+can be manipulated.
+.Pp
+The
+.Fa policy
+entry contains a vm_domain_policy_entry with the following fields:
+.Bd -literal
+struct vm_domain_policy_entry {
+    vm_domain_policy_type_t policy;   /* VM policy */
+    int domain;   /* VM domain, if applicable */
+}
+.Ed
+.Fa vm_domain_policy_type_t policy
+is one these:
+.Bl -tag -width VM_POLICY_NONE
+.It Dv VM_POLICY_NONE
+Reset the domain back to none.
+Any parent object NUMA domain policy will apply.
+The only valid value for
+.Dv domain
+is -1.
+.It Dv VM_POLICY_ROUND_ROBIN
+Select round-robin policy.
+Pages will be allocated round-robin from each VM domain in order.
+The only valid value for
+.Dv domain
+is -1.
+.It Dv VM_POLICY_FIXED_DOMAIN
+Select fixed-domain only policy.
+Pages will be allocated from the given
+.Dv domain
+which must be set to a valid VM domain.
+Pages will not be allocated from another domain if
+.Dv domain
+is out of free pages.
+.It Dv VM_POLICY_FIXED_DOMAIN_ROUND_ROBIN
+Select fixed-domain only policy.
+Pages will be allocated from
+.Dv domain
+which must be set to a valid VM domain.
+If page allocation fails, pages will be round-robin
+allocated from another domain if
+.Dv domain
+is out of free pages.
+.It Dv VM_POLICY_FIRST_TOUCH
+Select first-touch policy.
+Pages will be allocated from the NUMA domain which the thread
+is currently scheduled upon.
+Pages will not be allocated from another domain if the current domain
+is out of free pages.
+The only valid value for
+.Dv domain
+is -1.
+.It Dv VM_POLICY_FIRST_TOUCH_ROUND_ROBIN
+Select first-touch policy.
+Pages will be allocated from the NUMA domain which the thread
+is currently scheduled upon.
+Pages will be allocated round-robin from another domain if the
+current domain is out of free pages.
+The only valid value for
+.Dv domain
+is -1.
+.El
+.Pp
+Note that the VM might assign some pages from other domains.
+For example, if an existing page allocation is covered by a superpage
+allocation.
+.Pp
+.Fn numa_getaffinity
+retrieves the
+NUMA policy from the object specified by
+.Fa which
+and
+.Fa id
+and stores it in the space provided by
+.Fa policy .
+.Pp
+.Fn numa_setaffinity
+attempts to set the NUMA policy for the object specified by
+.Fa which
+and
+.Fa id
+to the policy in
+.Fa policy .
+.Sh RETURN VALUES
+.Rv -std
+.Sh ERRORS
+.Va errno
+can contain these error codes:
+.Bl -tag -width Er
+.It Bq Er EINVAL
+The
+.Fa level
+or
+.Fa which
+argument was not a valid value.
+.It Bq Er EINVAL
+The
+.Fa policy
+argument specified when calling
+.Fn numa_setaffinity
+did not contain a valid policy.
+.It Bq Er EFAULT
+The policy 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 domain
+in the given policy
+was out of the range of possible VM domains available.
+.It Bq Er EPERM
+The calling process did not have the credentials required to complete the
+operation.
+.El
+.Sh SEE ALSO
+.Xr cpuset 1 ,
+.Xr numactl 1 ,
+.Xr cpuset 2 ,
+.Xr cpuset_getaffinity 2 ,
+.Xr cpuset_getid 2 ,
+.Xr cpuset_setaffinity 2 ,
+.Xr cpuset_setid 2 ,
+.Xr pthread_affinity_np 3 ,
+.Xr pthread_attr_affinity_np 3 ,
+.Xr numa 4
+.Sh HISTORY
+The
+.Nm
+family of system calls first appeared in
+.Fx 11.0 .
+.Sh AUTHORS
+.An Adrian Chadd Aq Mt adrian@FreeBSD.org