156fd4834a
(one manual change to fix grammar) Confirmed With: db Approved by: secteam (not really, but this is a comment typo fix)
133 lines
4.1 KiB
Groff
133 lines
4.1 KiB
Groff
.\" Copyright (c) 2015 Adrian Chadd <adrian@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 9, 2015
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.Dt NUMACTL 1
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.Os
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.Sh NAME
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.Nm numactl
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.Nd "manage NUMA policy configuration"
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.Sh SYNOPSIS
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.Nm
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.Op Fl l Ar policy
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.Op Fl m Ar domain
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.Op Fl c Ar domain
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.Ar cmd ...
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.Nm
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.Fl g
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.Op Fl p Ar pid
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.Op Fl t Ar tid
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.Nm
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.Fl s
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.Op Fl l Ar policy
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.Op Fl m Ar domain
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.Op Fl c Ar domain
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.Op Fl p Ar pid
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.Op Fl t Ar tid
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.Sh DESCRIPTION
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The
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.Nm
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command can be used to assign NUMA policies to processes/threads,
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run commands with a given NUMA policy, and query information
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about NUMA policies on running processes.
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.Pp
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.Nm
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requires a target to modify or query.
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The target may be specified as a command, process id or a thread id.
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Using
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.Fl -get
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the target's NUMA policy may be queried.
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Using
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.Fl -set
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the target's NUMA policy may be queried.
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If no target is specified,
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.Nm
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operates on itself.
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Not all combinations of operations and targets are supported.
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For example,
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you may not set the id of an existing set or query and launch a command
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at the same time.
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.Pp
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Each process and thread has a NUMA policy.
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By default the policy is NONE.
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If a thread policy is NONE, then the policy will fall back to the process.
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If the process policy is NONE, then the policy will fall back to the
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system default.
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The policy may be queried by using
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.Fl -get.
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.Pp
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The options are as follows:
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.Bl -tag -width ".Fl -cpudomain Ar domain"
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.It Fl -cpudomain Ar domain , Fl c Ar domain
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Set the given CPU scheduling policy.
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Constrain the object (tid, pid, command) to run on CPUs
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that belong to the given domain.
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.It Fl -get , Fl g
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Retrieve the NUMA policy for the given thread or process id.
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.It Fl -set , Fl s
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Set the NUMA policy for the given thread or process id.
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.It Fl -memdomain Ar domain , Fl m Ar domain
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Constrain the object (tid, pid, command) to the given
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domain.
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This is only valid for fixed-domain and fixed-domain-rr.
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It must not be set for other policies.
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.It Fl -mempolicy Ar policy , Fl l Ar policy
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Set the given memory allocation policy.
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Valid policies are none, rr, fixed-domain, fixed-domain-rr,
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first-touch, and first-touch-rr.
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A memdomain argument is required for fixed-domain and
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fixed-domain-rr.
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.It Fl -pid Ar pid , Fl p Ar pid
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Operate on the given pid.
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.It Fl -tid Ar tid , Fl t Ar tid
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Operate on the given tid.
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.El
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.Sh EXIT STATUS
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.Ex -std
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.Sh EXAMPLES
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Create a
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.Pa /bin/sh
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process with memory coming from domain 0, but
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CPUs coming from domain 1:
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.Dl numactl --mempolicy=fixed-domain --memdomain=0 --cpudomain=1 /bin/sh
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.Pp
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Query the NUMA policy for the
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.Aq sh pid :
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.Dl numactl --get --pid=<sh pid>
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.Pp
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Set the NUMA policy for the given TID to round-robin:
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.Dl numactl --set --mempolicy=rr --tid=<tid>
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.Sh SEE ALSO
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.Xr cpuset 2 ,
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.Xr numa 4
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.Sh HISTORY
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The
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.Nm
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command first appeared in
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.Fx 11.0 .
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.Sh AUTHORS
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.An Adrian Chadd Aq Mt adrian@FreeBSD.org
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