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662 lines
15 KiB
HTML
662 lines
15 KiB
HTML
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<body>
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<div id="header">
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<h1>
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cset(1) Manual Page
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</h1>
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<h2>NAME</h2>
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<div class="sectionbody">
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<p>cset -
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manage cpusets functions in the Linux kernel
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</p>
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</div>
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</div>
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<h2 id="_synopsis">SYNOPSIS</h2>
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<div class="sectionbody">
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<div class="verseblock">
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<div class="verseblock-content"><em>cset</em> [--version | --help | --tohex]
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<em>cset</em> [help <command> | <command> --help]
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<em>cset</em> [cset options] <command> [command options] [args]</div>
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<div class="verseblock-attribution">
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</div></div>
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</div>
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<h2 id="_description">DESCRIPTION</h2>
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<div class="sectionbody">
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<div class="admonitionblock">
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<table><tr>
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<td class="icon">
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<div class="title">Note</div>
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</td>
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<td class="content">In general, you need to have root permissions to run cset. The
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tool mounts the cpusets filesystem and manipulates it. Non-root users
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do not have permission for these actions.</td>
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</tr></table>
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</div>
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<div class="paragraph"><p>Cset is a Python application to make using the cpusets facilities in
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the Linux kernel easier. The actual included command is called <em>cset</em>
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and it allows manipulation of cpusets on the system and provides
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higher level functions such as implementation and control of a basic
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cpu shielding setup.</p></div>
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<h3 id="_typical_uses_of_cset_include">Typical uses of cset include</h3><div style="clear:left"></div>
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<div class="dlist"><dl>
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<dt class="hdlist1">
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Setting up and managing a simple shielded CPU environment
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</dt>
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<dd>
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<p>
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The concept of <em>shielded</em> cpus is that a certain number of
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cpus are partitioned off on the system and only processes that
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are of interest are run on these cpus (i.e., inside the shield).
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</p>
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<div class="paragraph"><p>For a simple shielded configuration, one typically uses three cpusets:
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the root set, a system set and a user set. <em>Cset</em> includes a super
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command that implements this strategy and lets you easily manage it.
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See <em>cset-shield(1)</em> for more details.</p></div>
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</dd>
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<dt class="hdlist1">
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Setting up and managing a complex shielding environment
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</dt>
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<dd>
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<p>
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Shielding can be more complex of course where concepts such as
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priority cpusets and intersecting cpuset can be used. You can
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use <em>cset</em> to help manage this type of shielding as well. You
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will need to use the <em>cset-set(1)</em> and <em>cset-proc(1)</em>
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subcommands directly to do that.
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</p>
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</dd>
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<dt class="hdlist1">
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Managing cpusets on the system
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</dt>
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<dd>
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<p>
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The cset subcommand <em>cset-set(1)</em> allows you to create and
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destroy arbitrary cpusets on the system and assign arbitrary
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cpus and memory nodes to them. The cpusets so created have to
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follow the Linux kernel cpuset rules. See the <em>cset-set(1)</em>
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subcommand for more details.
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</p>
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</dd>
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<dt class="hdlist1">
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Managing processes that run on various system cpusets
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</dt>
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<dd>
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<p>
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The cset subcommand <em>cset-proc(1)</em> allows you to manage
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processes running on various cpusets created on the system.
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You can exec new processes in specific cpusets and move tasks
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around existing cpusets. See the <em>cset-proc(1)</em> subcommand
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for more details.
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</p>
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</dd>
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</dl></div>
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</div>
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<h2 id="_options">OPTIONS</h2>
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<div class="sectionbody">
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<div class="paragraph"><p>The following generic option flags are available. Additional options
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are available per-command, and documented in the command-specific
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documentation.</p></div>
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<div class="dlist"><dl>
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<dt class="hdlist1">
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<em>cset</em> --version
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</dt>
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<dd>
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<p>
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Display version information and exits.
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</p>
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</dd>
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<dt class="hdlist1">
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<em>cset</em> --help
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</dt>
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<dd>
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<p>
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Prints the synopsis and a list of all commands.
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</p>
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</dd>
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<dt class="hdlist1">
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<em>cset</em> --log <filename>
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</dt>
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<dd>
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<p>
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Creates a log file for the current run. All manner of useful
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information is stored in this file. This is usually used to
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debug cset when things don’t go as planned.
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</p>
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</dd>
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<dt class="hdlist1">
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<em>cset</em> --machine
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</dt>
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<dd>
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<p>
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Makes cset output information for all operations in a format
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that is machine readable (i.e. easy to parse).
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</p>
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</dd>
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<dt class="hdlist1">
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<em>cset</em> --tohex <CPUSPEC>
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</dt>
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<dd>
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<p>
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Converts a CPUSPEC (see <em>cset-set(1)</em> for definition) to a
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hexadecimal number and outputs it. Useful for setting IRQ
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stub affinity to a cpuset definition.
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</p>
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</dd>
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</dl></div>
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</div>
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<h2 id="_cset_commands">CSET COMMANDS</h2>
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<div class="sectionbody">
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<div class="paragraph"><p>The cset commands are divided into groups, according to the primary
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purpose of those commands. Following is a short description of each
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command. A more detailed description is available in individual
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command manpages. Those manpages are named <em>cset-<command>(1)</em>. The
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first command, <em>help</em>, is especially useful as it prints out a long
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summary of what a particular command does.</p></div>
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<div class="dlist"><dl>
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<dt class="hdlist1">
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|
<em>cset help command</em>
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</dt>
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<dd>
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<p>
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print out a lengthy summary of how the specified subcommand
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works
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</p>
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</dd>
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<dt class="hdlist1">
|
|
<em>cset command --help</em>
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
print out an extended synopsis of the specified subcommand
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
<em>cset shield</em>
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
supercommand to set up and manage basic shielding (see
|
|
<em>cset-shield(1)</em>)
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
<em>cset set</em>
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
create, modify and destroy cpusets (see <em>cset-set(1)</em>)
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
<em>cset proc</em>
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
create and manage processes within cpusets (see
|
|
<em>cset-proc(1)</em>)
|
|
</p>
|
|
</dd>
|
|
</dl></div>
|
|
</div>
|
|
<h2 id="_persistent_cpusets">PERSISTENT CPUSETS</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>To create a persistent cpuset setup, i.e. one that survives a reboot,
|
|
you need to create the file <em>/etc/init.d/cset</em>. This distribuition of
|
|
cset includes an example cset init.d file found in
|
|
<em>/usr/share/doc/pacakges/cpuset</em> which is called <em>cset.init.d</em>. You
|
|
will need to alter the file to your specifications and copy it to be
|
|
the file <em>/etc/init.d/cset</em>. See the comments in that file for more
|
|
details.</p></div>
|
|
</div>
|
|
<h2 id="_files">FILES</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>If used, the init.d script <em>/etc/init.d/cset</em> starts and stops a
|
|
cpuset configuration on boot and poweroff.</p></div>
|
|
<div class="paragraph"><p>Cpuset uses a configuration file if present on the system. The file
|
|
is <em>/etc/cset.conf</em> and may contain the following options.</p></div>
|
|
<div class="dlist"><dl>
|
|
<dt class="hdlist1">
|
|
mountpoint = <directory_name>
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
Specify the mountpoint where the cpuset filesystem is to be
|
|
mounted. By default this is <em>/cpusets</em>; however, some people
|
|
prefer to mount this in the more traditional <em>/dev/cpusets</em>.
|
|
</p>
|
|
</dd>
|
|
</dl></div>
|
|
</div>
|
|
<h2 id="_license">LICENSE</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Cpuset is licensed under the GNU GPL V2 only.</p></div>
|
|
</div>
|
|
<h2 id="_copyright">COPYRIGHT</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Copyright (c) 2008-2011 Novell Inc.</p></div>
|
|
</div>
|
|
<h2 id="_author">AUTHOR</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Written by Alex Tsariounov <tsariounov@gmail.com></p></div>
|
|
<div class="paragraph"><p>Some substrate code and ideas were taken from the excellent Stacked
|
|
GIT (stgit) v0.13 (see http://gna.org/projects/stgit and
|
|
http://www.procode.org/stgit). Stacked GIT is under GPL V2 or later.</p></div>
|
|
</div>
|
|
<h2 id="_see_also">SEE ALSO</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>cset-set(1), cset-proc(1), cset-shield(1)</p></div>
|
|
<div class="paragraph"><p>/usr/share/doc/packages/cpuset/html/tutorial.html</p></div>
|
|
<div class="paragraph"><p>/usr/share/doc/packages/cpuset/cset.init.d</p></div>
|
|
<div class="paragraph"><p>taskset(1), chrt(1)</p></div>
|
|
<div class="paragraph"><p>/usr/src/linux/Documentation/cpusets.txt</p></div>
|
|
</div>
|
|
<div id="footer">
|
|
<div id="footer-text">
|
|
Version 1.5.6<br />
|
|
Last updated 2011-06-09 12:53:59 EDT
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|