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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">
<a id="idm281472944061928"></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">
<a id="idm281472944018536"></a>
<h2>Syntax</h2>
<pre class="synopsis">ktot[,kcpu1, kcpu2,...]<span class="command"><strong>cpumeter</strong></span> ifreq</pre>
</div>
<div class="refsect1">
<a id="idm281472944016392"></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">
<a id="idm281472944014600"></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">
<a id="idm281472944012008"></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="idm281472944010152"></a>
<p class="title">
<strong>Example 170. 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>
<div class="refsect1">
<a id="idm281472776989080"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o cpumeter.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span> <span class="c1">;cpu metering; stop when too large</span>
k<span class="n">0</span> <span class="nb">cpumeter</span> <span class="mf">0.1</span>
<span class="nb">printk2</span> k<span class="n">0</span>
<span class="k">if</span> k<span class="n">0</span><span class="o">></span><span class="mi">70</span> <span class="k">then</span>
<span class="nb">event</span> <span class="s">"i"</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mi">1</span>
<span class="k">endif</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">2</span>
<span class="nb">event_i</span> <span class="s">"i"</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1000</span>
a<span class="n">sig</span> <span class="nb">oscil</span> <span class="mf">0.2</span><span class="p">,</span> <span class="mi">440</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">3</span>
<span class="nb">exitnow</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">32768</span> <span class="mi">10</span> <span class="mi">1</span> <span class="c1">; sine wave</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">1000</span>
<span class="nb">i</span> <span class="mi">2</span> <span class="mi">0</span> <span class="mi">1000</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472944005864"></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">
<a id="idm281472944001928"></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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