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1076 lines
28 KiB
HTML
1076 lines
28 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
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<meta name="generator" content="AsciiDoc 8.6.8" />
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<title>cset-shield(1)</title>
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<style type="text/css">
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/* Shared CSS for AsciiDoc xhtml11 and html5 backends */
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/* Default font. */
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body {
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font-family: Georgia,serif;
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}
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/* Title font. */
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h1, h2, h3, h4, h5, h6,
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div.title, caption.title,
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thead, p.table.header,
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#toctitle,
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#author, #revnumber, #revdate, #revremark,
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#footer {
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font-family: Arial,Helvetica,sans-serif;
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}
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body {
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margin: 1em 5% 1em 5%;
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}
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a {
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color: blue;
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text-decoration: underline;
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}
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a:visited {
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color: fuchsia;
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}
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em {
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font-style: italic;
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color: navy;
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}
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strong {
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font-weight: bold;
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color: #083194;
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}
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h1, h2, h3, h4, h5, h6 {
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color: #527bbd;
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margin-top: 1.2em;
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margin-bottom: 0.5em;
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line-height: 1.3;
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}
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h1, h2, h3 {
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border-bottom: 2px solid silver;
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}
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h2 {
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padding-top: 0.5em;
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}
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h3 {
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float: left;
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}
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h3 + * {
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clear: left;
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}
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h5 {
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font-size: 1.0em;
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}
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div.sectionbody {
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margin-left: 0;
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}
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hr {
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border: 1px solid silver;
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}
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p {
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margin-top: 0.5em;
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margin-bottom: 0.5em;
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}
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ul, ol, li > p {
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margin-top: 0;
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}
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ul > li { color: #aaa; }
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ul > li > * { color: black; }
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.monospaced, code, pre {
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font-family: "Courier New", Courier, monospace;
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font-size: inherit;
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color: navy;
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padding: 0;
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margin: 0;
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}
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#author {
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color: #527bbd;
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font-weight: bold;
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font-size: 1.1em;
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}
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#email {
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}
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#revnumber, #revdate, #revremark {
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}
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#footer {
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font-size: small;
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border-top: 2px solid silver;
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padding-top: 0.5em;
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margin-top: 4.0em;
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}
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#footer-text {
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float: left;
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padding-bottom: 0.5em;
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}
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#footer-badges {
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float: right;
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padding-bottom: 0.5em;
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}
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#preamble {
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margin-top: 1.5em;
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margin-bottom: 1.5em;
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}
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div.imageblock, div.exampleblock, div.verseblock,
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div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock,
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div.admonitionblock {
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margin-top: 1.0em;
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margin-bottom: 1.5em;
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}
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div.admonitionblock {
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margin-top: 2.0em;
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margin-bottom: 2.0em;
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margin-right: 10%;
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color: #606060;
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}
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div.content { /* Block element content. */
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padding: 0;
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}
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/* Block element titles. */
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div.title, caption.title {
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color: #527bbd;
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font-weight: bold;
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text-align: left;
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margin-top: 1.0em;
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margin-bottom: 0.5em;
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}
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div.title + * {
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margin-top: 0;
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}
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td div.title:first-child {
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margin-top: 0.0em;
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}
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div.content div.title:first-child {
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margin-top: 0.0em;
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}
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div.content + div.title {
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margin-top: 0.0em;
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}
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div.sidebarblock > div.content {
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background: #ffffee;
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border: 1px solid #dddddd;
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border-left: 4px solid #f0f0f0;
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padding: 0.5em;
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}
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div.listingblock > div.content {
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border: 1px solid #dddddd;
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border-left: 5px solid #f0f0f0;
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background: #f8f8f8;
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padding: 0.5em;
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}
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div.quoteblock, div.verseblock {
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padding-left: 1.0em;
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margin-left: 1.0em;
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margin-right: 10%;
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border-left: 5px solid #f0f0f0;
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color: #888;
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}
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div.quoteblock > div.attribution {
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padding-top: 0.5em;
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text-align: right;
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}
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div.verseblock > pre.content {
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font-family: inherit;
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font-size: inherit;
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}
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div.verseblock > div.attribution {
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padding-top: 0.75em;
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text-align: left;
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}
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/* DEPRECATED: Pre version 8.2.7 verse style literal block. */
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div.verseblock + div.attribution {
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text-align: left;
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}
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div.admonitionblock .icon {
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vertical-align: top;
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font-size: 1.1em;
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font-weight: bold;
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text-decoration: underline;
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color: #527bbd;
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padding-right: 0.5em;
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}
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div.admonitionblock td.content {
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padding-left: 0.5em;
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border-left: 3px solid #dddddd;
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}
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div.exampleblock > div.content {
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border-left: 3px solid #dddddd;
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padding-left: 0.5em;
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}
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div.imageblock div.content { padding-left: 0; }
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span.image img { border-style: none; }
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a.image:visited { color: white; }
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dl {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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dt {
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margin-top: 0.5em;
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margin-bottom: 0;
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font-style: normal;
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color: navy;
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}
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dd > *:first-child {
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margin-top: 0.1em;
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}
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ul, ol {
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list-style-position: outside;
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}
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ol.arabic {
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list-style-type: decimal;
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}
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ol.loweralpha {
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list-style-type: lower-alpha;
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}
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ol.upperalpha {
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list-style-type: upper-alpha;
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}
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ol.lowerroman {
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list-style-type: lower-roman;
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}
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ol.upperroman {
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list-style-type: upper-roman;
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}
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div.compact ul, div.compact ol,
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div.compact p, div.compact p,
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div.compact div, div.compact div {
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margin-top: 0.1em;
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margin-bottom: 0.1em;
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}
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tfoot {
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font-weight: bold;
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}
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td > div.verse {
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white-space: pre;
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}
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div.hdlist {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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div.hdlist tr {
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padding-bottom: 15px;
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}
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dt.hdlist1.strong, td.hdlist1.strong {
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font-weight: bold;
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}
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td.hdlist1 {
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vertical-align: top;
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font-style: normal;
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padding-right: 0.8em;
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color: navy;
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}
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td.hdlist2 {
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vertical-align: top;
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}
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div.hdlist.compact tr {
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margin: 0;
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padding-bottom: 0;
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}
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.comment {
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background: yellow;
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}
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.footnote, .footnoteref {
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font-size: 0.8em;
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}
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span.footnote, span.footnoteref {
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vertical-align: super;
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}
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#footnotes {
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margin: 20px 0 20px 0;
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padding: 7px 0 0 0;
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}
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#footnotes div.footnote {
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margin: 0 0 5px 0;
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}
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#footnotes hr {
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border: none;
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border-top: 1px solid silver;
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height: 1px;
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text-align: left;
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margin-left: 0;
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width: 20%;
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min-width: 100px;
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}
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div.colist td {
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padding-right: 0.5em;
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padding-bottom: 0.3em;
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vertical-align: top;
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}
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div.colist td img {
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margin-top: 0.3em;
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}
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@media print {
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#footer-badges { display: none; }
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}
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#toc {
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margin-bottom: 2.5em;
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}
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#toctitle {
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color: #527bbd;
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font-size: 1.1em;
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font-weight: bold;
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margin-top: 1.0em;
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margin-bottom: 0.1em;
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}
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div.toclevel0, div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 {
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margin-top: 0;
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margin-bottom: 0;
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}
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div.toclevel2 {
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margin-left: 2em;
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font-size: 0.9em;
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}
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div.toclevel3 {
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margin-left: 4em;
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font-size: 0.9em;
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}
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div.toclevel4 {
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margin-left: 6em;
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font-size: 0.9em;
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}
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span.aqua { color: aqua; }
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span.black { color: black; }
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span.blue { color: blue; }
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span.fuchsia { color: fuchsia; }
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span.gray { color: gray; }
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span.green { color: green; }
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span.lime { color: lime; }
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span.maroon { color: maroon; }
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span.navy { color: navy; }
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span.olive { color: olive; }
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span.purple { color: purple; }
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span.red { color: red; }
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span.silver { color: silver; }
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span.teal { color: teal; }
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span.white { color: white; }
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span.yellow { color: yellow; }
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span.aqua-background { background: aqua; }
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span.black-background { background: black; }
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span.blue-background { background: blue; }
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span.fuchsia-background { background: fuchsia; }
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span.gray-background { background: gray; }
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span.green-background { background: green; }
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span.lime-background { background: lime; }
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span.maroon-background { background: maroon; }
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span.navy-background { background: navy; }
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span.olive-background { background: olive; }
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span.purple-background { background: purple; }
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span.red-background { background: red; }
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span.silver-background { background: silver; }
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span.teal-background { background: teal; }
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span.white-background { background: white; }
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span.yellow-background { background: yellow; }
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span.big { font-size: 2em; }
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span.small { font-size: 0.6em; }
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span.underline { text-decoration: underline; }
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span.overline { text-decoration: overline; }
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span.line-through { text-decoration: line-through; }
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div.unbreakable { page-break-inside: avoid; }
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/*
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* xhtml11 specific
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*
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* */
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div.tableblock {
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margin-top: 1.0em;
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margin-bottom: 1.5em;
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}
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div.tableblock > table {
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border: 3px solid #527bbd;
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}
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thead, p.table.header {
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font-weight: bold;
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color: #527bbd;
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}
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p.table {
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margin-top: 0;
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}
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/* Because the table frame attribute is overriden by CSS in most browsers. */
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div.tableblock > table[frame="void"] {
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border-style: none;
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}
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div.tableblock > table[frame="hsides"] {
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border-left-style: none;
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border-right-style: none;
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}
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div.tableblock > table[frame="vsides"] {
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border-top-style: none;
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border-bottom-style: none;
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}
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/*
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* html5 specific
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*
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* */
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table.tableblock {
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margin-top: 1.0em;
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margin-bottom: 1.5em;
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}
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thead, p.tableblock.header {
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font-weight: bold;
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color: #527bbd;
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}
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p.tableblock {
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margin-top: 0;
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}
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table.tableblock {
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border-width: 3px;
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border-spacing: 0px;
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border-style: solid;
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border-color: #527bbd;
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border-collapse: collapse;
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}
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th.tableblock, td.tableblock {
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border-width: 1px;
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padding: 4px;
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border-style: solid;
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border-color: #527bbd;
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}
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table.tableblock.frame-topbot {
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border-left-style: hidden;
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border-right-style: hidden;
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}
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table.tableblock.frame-sides {
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border-top-style: hidden;
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border-bottom-style: hidden;
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}
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table.tableblock.frame-none {
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border-style: hidden;
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}
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th.tableblock.halign-left, td.tableblock.halign-left {
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text-align: left;
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}
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th.tableblock.halign-center, td.tableblock.halign-center {
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text-align: center;
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}
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th.tableblock.halign-right, td.tableblock.halign-right {
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text-align: right;
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}
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th.tableblock.valign-top, td.tableblock.valign-top {
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vertical-align: top;
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}
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th.tableblock.valign-middle, td.tableblock.valign-middle {
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vertical-align: middle;
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}
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th.tableblock.valign-bottom, td.tableblock.valign-bottom {
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vertical-align: bottom;
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}
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|
|
|
|
/*
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* manpage specific
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*
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* */
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body.manpage h1 {
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padding-top: 0.5em;
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padding-bottom: 0.5em;
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border-top: 2px solid silver;
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border-bottom: 2px solid silver;
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}
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body.manpage h2 {
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border-style: none;
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}
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body.manpage div.sectionbody {
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margin-left: 3em;
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}
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@media print {
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body.manpage div#toc { display: none; }
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}
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|
|
|
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</style>
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<script type="text/javascript">
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/*<+'])');
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// Function that scans the DOM tree for header elements (the DOM2
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// nodeIterator API would be a better technique but not supported by all
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// browsers).
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var iterate = function (el) {
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for (var i = el.firstChild; i != null; i = i.nextSibling) {
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if (i.nodeType == 1 /* Node.ELEMENT_NODE */) {
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var mo = re.exec(i.tagName);
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if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") {
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result[result.length] = new TocEntry(i, getText(i), mo[1]-1);
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}
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iterate(i);
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}
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}
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|
}
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|
iterate(el);
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return result;
|
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}
|
|
|
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var toc = document.getElementById("toc");
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if (!toc) {
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return;
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}
|
|
|
|
// Delete existing TOC entries in case we're reloading the TOC.
|
|
var tocEntriesToRemove = [];
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var i;
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for (i = 0; i < toc.childNodes.length; i++) {
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var entry = toc.childNodes[i];
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if (entry.nodeName.toLowerCase() == 'div'
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&& entry.getAttribute("class")
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&& entry.getAttribute("class").match(/^toclevel/))
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tocEntriesToRemove.push(entry);
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}
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for (i = 0; i < tocEntriesToRemove.length; i++) {
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toc.removeChild(tocEntriesToRemove[i]);
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}
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|
|
|
// Rebuild TOC entries.
|
|
var entries = tocEntries(document.getElementById("content"), toclevels);
|
|
for (var i = 0; i < entries.length; ++i) {
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var entry = entries[i];
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|
if (entry.element.id == "")
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entry.element.id = "_toc_" + i;
|
|
var a = document.createElement("a");
|
|
a.href = "#" + entry.element.id;
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|
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</head>
|
|
<body class="manpage">
|
|
<div id="header">
|
|
<h1>
|
|
cset-shield(1) Manual Page
|
|
</h1>
|
|
<h2>NAME</h2>
|
|
<div class="sectionbody">
|
|
<p>cset-shield -
|
|
cpuset supercommand which implements cpu shielding
|
|
</p>
|
|
</div>
|
|
</div>
|
|
<div id="content">
|
|
<div class="sect1">
|
|
<h2 id="_synopsis">SYNOPSIS</h2>
|
|
<div class="sectionbody">
|
|
<div class="verseblock">
|
|
<pre class="content"><em>cset</em> [cset options] <em>shield</em> [shield options] [args]
|
|
<em>cset</em> shield --help
|
|
<em>cset</em> shield
|
|
<em>cset</em> shield --cpu 1-7
|
|
<em>cset</em> shield --cpu 1-7 --kthread=on
|
|
<em>cset</em> shield --exec /opt/software/myapp/doit --my_opt1 --my_opt2
|
|
<em>cset</em> shield --user appuser --exec run_benchmark.sh
|
|
<em>cset</em> shield --shield --pid 1024,2048,5000-1000
|
|
<em>cset</em> shield --unshield --pid 6000-8500
|
|
<em>cset</em> shield --kthread=off
|
|
<em>cset</em> shield --kthread=on
|
|
<em>cset</em> shield --shield bash</pre>
|
|
<div class="attribution">
|
|
</div></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_options">OPTIONS</h2>
|
|
<div class="sectionbody">
|
|
<div class="dlist"><dl>
|
|
<dt class="hdlist1">
|
|
-h, --help
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
prints the list of options for this command
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-c CPUSPEC, --cpu=CPUSPEC
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
modifies or initializes the shield cpusets
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-r, --reset
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
destroys the shield
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-e, --exec
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
executes args in the shield
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
--user=USER
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
use this USER for --exec (id or name)
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
--group=GROUP
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
use this GROUP for --exec (id or name)
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-s, --shield
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
shield PIDSPEC specified with -p/--pid of processes or threads
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-u, --unshield
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
remove PIDSPEC specified with -p/--pid of processes or threads from
|
|
the shield, the tasks keep running in the unshielded cpuset
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
--threads
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
if specified, any processes found in the PIDSPEC to have multiple
|
|
threads will automatically have all their threads added to the
|
|
PIDSPEC (use to shield or unshield all related threads)
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-k on|off, --kthread=on|off
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
shield from unbound interrupt threads as well
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-f, --force
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
force operation, use with care
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
-v, --verbose
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
prints more detailed output, additive
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
--sysset=SYSSET
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
optionally specify system cpuset name
|
|
</p>
|
|
</dd>
|
|
<dt class="hdlist1">
|
|
--userset=USERSET
|
|
</dt>
|
|
<dd>
|
|
<p>
|
|
optionally specify user cpuset name
|
|
</p>
|
|
</dd>
|
|
</dl></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_description">DESCRIPTION</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>This is a supercommand that creates basic cpu shielding. The
|
|
normal cset commands can of course be used to create this basic
|
|
shield, but the shield command combines many such commands to
|
|
create and manage a common type of cpu shielding setup.</p></div>
|
|
<div class="paragraph"><p>The concept of shielding implies at minimum three cpusets, for
|
|
example: root, user and system. The root cpuset always exists in
|
|
all implementations of cpusets and contains all available CPUs on
|
|
the machine. The system cpuset is so named because normal system
|
|
tasks are made to run on it. The user cpuset is so named because
|
|
that is the "shielded" cpuset on which you would run your tasks
|
|
of interest.</p></div>
|
|
<div class="paragraph"><p>Usually, CPU zero would be in the system set and the rest of the
|
|
CPUs would be in the user set. After creation of the cpusets,
|
|
all processes running in the root cpuset are moved to the system
|
|
cpuset. Thus any new processes or threads spawned from these
|
|
processes will also run the system cpuset.</p></div>
|
|
<div class="paragraph"><p>If the optional --kthread=on option is given to the shield
|
|
command, then all kernel threads (with exception of the per-CPU
|
|
bound interrupt kernel threads) are also moved to the system set.</p></div>
|
|
<div class="paragraph"><p>One executes processes on the shielded user cpuset with the
|
|
--exec subcommand or moves processes or threads to the shielded
|
|
cpuset with the --shield subcommand with a --pid option.</p></div>
|
|
<div class="admonitionblock">
|
|
<table><tr>
|
|
<td class="icon">
|
|
<div class="title">Note</div>
|
|
</td>
|
|
<td class="content">You do not need to specify which cpuset a process or thread
|
|
is running in initially when using the --shield subcommand.</td>
|
|
</tr></table>
|
|
</div>
|
|
<div class="paragraph"><p>To create a shield, you would execute the shield command with the
|
|
--cpu option that specifies CPUSPEC argument that assigns CPUs to
|
|
be under the shield (this means assigned to the user cpuset, all
|
|
other cpus will be assigned to the system set).</p></div>
|
|
<div class="paragraph"><p>For example:</p></div>
|
|
<div class="paragraph"><p><strong><code># cset shield --cpu=1-3</code></strong></p></div>
|
|
<div class="paragraph"><p>On a 4-way machine, this command will dedicate the first
|
|
processor, CPU0, for the system set (unshielded) and the last
|
|
three processors, CPU1, CPU2, CPU3, for the user set (shielded).</p></div>
|
|
<div class="paragraph"><p>The CPUSPEC will accept a comma separated list of CPUs and
|
|
inclusive range specifications. For example, --cpu=1,3,5-7 will
|
|
assign CPU1, CPU3, CPU5, CPU6, and CPU7 to the user (or shielded)
|
|
cpuset and the inverse of that to the system (or unshielded)
|
|
cpuset.</p></div>
|
|
<div class="paragraph"><p>If you do not like the names "system" and "user" for the
|
|
unshielded and shielded sets respectively, or if those names are
|
|
used already, then use the --sysset and --userset options.</p></div>
|
|
<div class="paragraph"><p>For example:</p></div>
|
|
<div class="paragraph"><p><strong><code># cset shield --sysset=free --userset=cage --cpu=2,3 --kthread=on</code></strong></p></div>
|
|
<div class="paragraph"><p>The above command will use the name "free" for the unshielded
|
|
system cpuset, the name "cage" for the shielded user cpuset,
|
|
initialize these cpusets and dedicate CPU0 and CPU1 to the "free"
|
|
set and (on a 4-way machine) dedicate CPU2 and CPU3 to the "cage"
|
|
set. Further, the command moves all processes and threads,
|
|
including kernel threads from the root cpuset to the "free"
|
|
cpuset.</p></div>
|
|
<div class="admonitionblock">
|
|
<table><tr>
|
|
<td class="icon">
|
|
<div class="title">Note</div>
|
|
</td>
|
|
<td class="content">If you do use the --syset/--userset options, then you must
|
|
continue to use those for every invocation of the shield supercommand.</td>
|
|
</tr></table>
|
|
</div>
|
|
<div class="paragraph"><p>After initialization, you can run the process of interest on the
|
|
shielded cpuset with the --exec subcommand, or move processes or
|
|
threads already running to the shielded cpuset with the --shield
|
|
subcommand and the --pid option.</p></div>
|
|
<div class="paragraph"><p>Note that if your execed command takes options, then use the
|
|
traditional "--" marker to separate cset’s options from your
|
|
command’s options.</p></div>
|
|
<div class="paragraph"><p>For example:</p></div>
|
|
<div class="paragraph"><p><strong><code># cset shield --exec — ls -l</code></strong></p></div>
|
|
<div class="paragraph"><p>This command will execute "ls -l" inside the shield.</p></div>
|
|
<div class="paragraph"><p>The PIDSPEC argument taken for the --pid (or -p) option is a
|
|
comma separated list of PIDs or TIDs. The list can also include
|
|
brackets of PIDs or TIDs that are inclusive of the endpoints.</p></div>
|
|
<div class="paragraph"><p>For example:</p></div>
|
|
<div class="literalblock">
|
|
<div class="content">
|
|
<pre><code>1,2,5 Means processes 1, 2 and 5
|
|
1,2,600-700 Means processes 1, 2 and from 600 to 700</code></pre>
|
|
</div></div>
|
|
<div class="paragraph"><p><strong><code># cset shield --shield --pid=50-65</code></strong></p></div>
|
|
<div class="paragraph"><p>The above command moves all processes and threads with PID or TID
|
|
in the range 50-65 inclusive, from the system cpuset into the
|
|
shielded user cpuset. If they are running in the root cpuset,
|
|
you must use the --force option to actually move them into the
|
|
shield.</p></div>
|
|
<div class="admonitionblock">
|
|
<table><tr>
|
|
<td class="icon">
|
|
<div class="title">Note</div>
|
|
</td>
|
|
<td class="content">The range of PIDs or TIDs does not need to have every
|
|
position populated. In other words, for the example above, if
|
|
there is only one process, say PID 57, in the range of 50-65,
|
|
then only that process will be moved.</td>
|
|
</tr></table>
|
|
</div>
|
|
<div class="paragraph"><p>The --unshield (or -u) subcommand will remove the specified
|
|
processes or threads from the shielded cpuset and move them into
|
|
the unshielded (or system) cpuset. This command is also used in
|
|
conjunction with a -p/--pid option that specifies a PIDSPEC
|
|
argument, the same as for the --shield subcommand.</p></div>
|
|
<div class="paragraph"><p>Both the --shield and the --unshield commands will also finally
|
|
output the number of tasks running in the shield and out of the
|
|
shield if you do not specify a PIDSPEC with --pid. By specifying
|
|
also a --verbose in addition, then you will get a listing of
|
|
every task that is running in either the shield or out of the
|
|
shield.</p></div>
|
|
<div class="paragraph"><p>Using no subcommand, ie. only "cset shield", will output the
|
|
status of both shield and non-shield. Tasks will be listed if
|
|
--verbose is used.</p></div>
|
|
<div class="paragraph"><p>You can adjust which CPUs are in the shielded cpuset by issuing
|
|
the --cpu subcommand again anytime after the shield has been
|
|
initialized.</p></div>
|
|
<div class="paragraph"><p>For example if the original shield contained CPU0 and CPU1 in the
|
|
system set and CPU2 and CPU3 in the user set, if you then issue
|
|
the following command:</p></div>
|
|
<div class="paragraph"><p><strong><code># cset shield --cpu=1,2,3</code></strong></p></div>
|
|
<div class="paragraph"><p>then that command will move CPU1 into the shielded "user" cpuset.
|
|
Any processes or threads that were running on CPU1 that belonged
|
|
to the unshielded "system" cpuset are migrated to CPU0 by the
|
|
system.</p></div>
|
|
<div class="paragraph"><p>The --reset subcommand will in essence destroy the shield. For
|
|
example, if there was a shield on a 4-way machine with CPU0 in
|
|
system and CPUs 1-3 in user with processes running on the user
|
|
cpuset (i.e. in the shield), and a --reset subcommand was issued,
|
|
then all processes running in both system and user cpusets would
|
|
be migrated to the root cpuset (which has access to all CPUs and
|
|
never goes away), after which both system and user cpusets would
|
|
be destroyed.</p></div>
|
|
<div class="admonitionblock">
|
|
<table><tr>
|
|
<td class="icon">
|
|
<div class="title">Note</div>
|
|
</td>
|
|
<td class="content">Even though you can mix general usage of cpusets with
|
|
the shielding concepts described here, you generally will not
|
|
want to. For more complex shielding or usage scenarios, one
|
|
would generally use the normal cpuset commands (i.e. cset set
|
|
and proc) directly.</td>
|
|
</tr></table>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_license">LICENSE</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Cpuset is licensed under the GNU GPL V2 only.</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_copyright">COPYRIGHT</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Copyright (c) 2008-2011 Novell Inc.</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_author">AUTHOR</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Written by Alex Tsariounov <tsariounov@gmail.com>.</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_see_also">SEE ALSO</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>cset(1), cset-set(1), cset-proc(1)</p></div>
|
|
<div class="paragraph"><p>/usr/share/doc/packages/cpuset/html/tutorial.html</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>
|
|
</div>
|
|
<div id="footnotes"><hr /></div>
|
|
<div id="footer">
|
|
<div id="footer-text">
|
|
Version 1.5.6<br />
|
|
Last updated 2015-12-23 14:21:03 CET
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|