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162 lines
6.3 KiB
HTML
162 lines
6.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>获取当前资源使用状况</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.getrusage" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">getrusage</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">getrusage</span> — <span class="dc-title">获取当前资源使用状况</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.getrusage-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>getrusage</strong></span>
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([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$who</code><span class="initializer"> = 0</span></span>
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] ) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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这是 <strong class="command">getrusage(2)</strong> 的接口。它返回了调用自系统的数据。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.getrusage-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">who</code></dt>
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<dd>
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<p class="para">
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如果 <code class="parameter">who</code> 是 1，getrusage 会使用
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<strong><code>RUSAGE_CHILDREN</code></strong> 来调用。
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.getrusage-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回了一个包含系统返回数据的关联数组。所以条目均可通过文档中字段的名称来访问。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.getrusage-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-511">
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<p><strong>Example #1 <span class="function"><strong>getrusage()</strong></span> 例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$dat </span><span style="color: #007700">= </span><span style="color: #0000BB">getrusage</span><span style="color: #007700">();<br />echo </span><span style="color: #0000BB">$dat</span><span style="color: #007700">[</span><span style="color: #DD0000">"ru_nswap"</span><span style="color: #007700">]; </span><span style="color: #FF8000">// number of swaps<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">$dat</span><span style="color: #007700">[</span><span style="color: #DD0000">"ru_majflt"</span><span style="color: #007700">]; </span><span style="color: #FF8000">// number of page faults<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">$dat</span><span style="color: #007700">[</span><span style="color: #DD0000">"ru_utime.tv_sec"</span><span style="color: #007700">]; </span><span style="color: #FF8000">// user time used (seconds)<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">$dat</span><span style="color: #007700">[</span><span style="color: #DD0000">"ru_utime.tv_usec"</span><span style="color: #007700">]; </span><span style="color: #FF8000">// user time used (microseconds)<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.getrusage-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>7.0.0</td>
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<td>
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此函数现在开始支持 Windows。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.getrusage-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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在 Windows 上 <span class="function"><strong>getrusage()</strong></span> 仅会返回以下类型：
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</p>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><em>"ru_stime.tv_sec"</em></li>
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<li class="member"><em>"ru_stime.tv_usec"</em></li>
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<li class="member"><em>"ru_utime.tv_sec"</em></li>
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<li class="member"><em>"ru_utime.tv_usec"</em></li>
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<li class="member">
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<em>"ru_majflt"</em> (only if <code class="parameter">who</code> is
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<strong><code>RUSAGE_SELF</code></strong>)
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</li>
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<li class="member">
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<em>"ru_maxrss"</em> (only if <code class="parameter">who</code> is
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<strong><code>RUSAGE_SELF</code></strong>)
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</li>
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</ul>
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</p>
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<p class="para">
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If <span class="function"><strong>getrusage()</strong></span> is called with <code class="parameter">who</code>
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set to <em>1</em> (<strong><code>RUSAGE_CHILDREN</code></strong>), then
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resource usage for threads are collected (meaning that internally the function
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is called with <strong><code>RUSAGE_THREAD</code></strong>).
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</p>
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</p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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在 BeOS 2000，仅会返回以下类型：
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</p>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><em>"ru_stime.tv_sec"</em></li>
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<li class="member"><em>"ru_stime.tv_usec"</em></li>
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<li class="member"><em>"ru_utime.tv_sec"</em></li>
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<li class="member"><em>"ru_utime.tv_usec"</em></li>
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</ul>
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.getrusage-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member">你系统上 <strong class="command">getrusage(2)</strong> 的 man page</li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |