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<div class="refentry" title="cpumeter">
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<h2>
<span class="refentrytitle">cpumeter</span>
</h2>
<p>cpumeter —
Reports the usage of cpu either total or per core.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp17119264"></a>
<h2>Description</h2>
<p>
Reports the usage of cpu either total or per core to monitor how
close to max-out the processing is.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp17119984"></a>
<h2>Syntax</h2>
<pre class="synopsis">ktot[,kcpu1, kcpu2,...]<span class="command"><strong>cpumeter</strong></span> ifreq</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp17123320"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifreq</em></span> is the time in seconds that the meter
is refreshed. If this is too low then mainly figures of zero or one
hundred occur. A value of 0.1 seems acceptable.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp17124304"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>cpumeter</em></span> reads the total idle time in the
last <span class="emphasis"><em>ifreq</em></span> seconds and reports it as a percentage usage. If
more than just <span class="emphasis"><em>ktot</em></span> results are requested these report the same value for
individual cores.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp17125768"></a>
<h2>Examples</h2>
<p>
Here is an example of the cpumeter opcode. It uses the file <a class="ulink" href="examples/cpumeter.csd" target="_top"><em class="citetitle">cpumeter.csd</em></a>.
</p>
<div class="example">
<a id="idp17180592"></a>
<p class="title">
<strong>Example 142. Example of the cpumeter opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o cpumeter.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="oblock">instr</span> 1 <span class="comment">;cpu metering; stop when too large</span>
k0 <span class="opc">cpumeter</span> 0.1
<span class="opc">printk2</span> k0
<span class="octrl">if</span> k0<span class="op">></span>70 then
<span class="opc">event</span> "i", 3, 0.1, 1
<span class="octrl">endif</span>
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2
<span class="opc">event_i</span> "i", 2, 1, 1000
asig <span class="opc">oscil</span> 0.2, 440, 1
<span class="opc">out</span> asig
<span class="oblock">endin</span>
<span class="oblock">instr</span> 3
<span class="opc">exitnow</span>
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span> 1 0 32768 10 1 <span class="comment">; sine wave</span>
<span class="stamnt">i</span> 1 0 1000
<span class="stamnt">i</span> 2 0 1000
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp17182792"></a>
<h2>See Also</h2>
<p>
<a class="link" href="maxalloc.html" title="maxalloc"><em class="citetitle">maxalloc</em></a>, <a class="link" href="prealloc.html" title="prealloc"><em class="citetitle">prealloc</em></a>,
<a class="link" href="cpuprc.html" title="cpuprc"><em class="citetitle">cpuprc</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp17184752"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: John ffitch</td>
</tr>
<tr>
<td>May 2011</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 5.14, for Linux/Unix and OSX only</p>
</div>
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