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9<title>GXClearVCacheMetric</title>
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14<h1 align="left">GXClearVCacheMetric</h1>
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16
17<h2>C Specification</h2>
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19<dl>
20<dd><PRE><CODE>#include &lt;revolution/gx.h&gt;</CODE></PRE>
21  </dd>
22<dd><pre><CODE>void GXClearVCacheMetric( void );</CODE></pre>
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26<p> </p>
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28<h2>Arguments</h2>
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30<p>None</p>
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32<h2>Return Values</h2>
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34<p>None</p>
35<H2>Description</H2>
36<P>The Graphics Processor (GP) can count many internal events that give detailed information on performance.&nbsp;This function clears the Vertex Cache performance counter by sending a special clear token via the graphics FIFO.</P>
37<P>To set the metric for the counter, call <a href="GXSetVCacheMetric.html"><code>GXSetVCacheMetric</code></a>.&nbsp;To read the counter value, call to <a href="GXReadVCacheMetric.html"><code>GXReadVCacheMetric</code></a>.</P>
38<H3>Example</H3>
39<P><code>u32 chk, miss, stall;<br> <br> GXSetVCacheMetric(GX_VC_ALL);<br> GXClearVCacheMetric();<br> <br> // Draw Object(s)</code></P>
40<P><code>// wait until object drawn<br> GXSetDrawSync(0xbeef);<br> while (0xbeef != GXReadDrawSync())<br> &nbsp;&nbsp;&nbsp; ;<br> <br> GXReadVCacheMetric(&amp;chk, &amp;miss, &amp;stall);<br> <br> OSReport(&quot;Vertex Cache miss rate:&nbsp; %f\n&quot;, (f32)miss/(f32)chk);</code></P>
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45<h2>See Also</h2>
46
47<p><a href="GXReadMemMetric.html">GXReadMemMetric</a><br> <a href="GXClearMemMetric.html">GXClearMemMetric</a><br> <a href="GXReadPixMetric.html">GXReadPixMetric</a><br> <a href="GXClearPixMetric.html">GXClearPixMetric</a><br> <a href="GXReadGPMetric.html">GXReadGPMetric</a><br> <a href="GXSetGPMetric.html">GXSetGPMetric</a><br> <a href="GXClearGPMetric.html">GXClearGPMetric</a></p>
48<H2>Revision History</H2>
49<P>2006/03/01 Initial version</P>