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9<title>GXSetVCacheMetric</title>
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14<h1 align="left">GXSetVCacheMetric</h1>
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16
17<h2>C Specification</h2>
18
19<dl>
20<dd><PRE><CODE>#include &lt;revolution/gx.h&gt;</CODE></PRE>
21  </dd>
22<dd><pre><CODE>void GXSetVCacheMetric( <a href="../Enumerated_Types/GXVCachePerf.html">GXVCachePerf</a> attr );</CODE></pre>
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24</dl>
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26<h2>Arguments</h2>
27
28<table border="1" cellpadding="3" cellspacing="0.1">
29  <tr>
30<td width="120" bgcolor="#ffffe8"><em><strong><CODE>attr</font></strong></em></td>
31<td width="520">Attribute used to qualify vertex cache counter updates. Accepted values are:
32      <table border="1" cellspacing="0.1" width="500">
33        <tr>
34<td width="150" bgcolor="#C0C0C0">Name</td>
35<td width="350" bgcolor="#C0C0C0">attribute</td>
36        </tr>
37        <tr>
38<td width="150"><code>GX_VC_POS</code></td>
39<td width="350">the position coordinate</td>
40        </tr>
41        <tr>
42<td width="150"><code>GX_VC_NRM</code></td>
43<td width="350">the normal</td>
44        </tr>
45        <tr>
46<td width="150"><code>GX_VC_CLR0</code></td>
47<td width="350">vertex color 0.</td>
48        </tr>
49        <tr>
50<td width="150"><code>GX_VC_CLR1</code></td>
51<td width="350">vertex color 1.</td>
52        </tr>
53        <tr>
54<td width="150"><code>GX_VC_TEX0</code></td>
55<td width="350">texture coordinate 0</td>
56        </tr>
57        <tr>
58<td width="150"><code>GX_VC_TEX1</code></td>
59<td width="350">texture coordinate 1</td>
60        </tr>
61        <tr>
62<td width="150"><code>GX_VC_TEX2</code></td>
63<td width="350">texture coordinate 2</td>
64        </tr>
65        <tr>
66<td width="150"><code>GX_VC_TEX3</code></td>
67<td width="350">texture coordinate 3</td>
68        </tr>
69        <tr>
70<td width="150"><code>GX_VC_TEX4</code></td>
71<td width="350">texture coordinate 4</td>
72        </tr>
73        <tr>
74<td width="150"><code>GX_VC_TEX5</code></td>
75<td width="350">texture coordinate 5</td>
76        </tr>
77        <tr>
78<td width="150"><code>GX_VC_TEX6</code></td>
79<td width="350">texture coordinate 6</td>
80        </tr>
81        <tr>
82<td width="150"><code>GX_VC_TEX7</code></td>
83<td width="350">texture coordinate 7</td>
84        </tr>
85        <tr>
86<td width="150"><code>GX_VC_ALL</code></td>
87<td width="350">All attributes.</td>
88        </tr>
89      </table>
90Use <code>GX_VC_ALL</code> to enable the cache counters for all attributes.</td>
91  </tr>
92</table>
93<h2>Return Values</h2>
94
95<p>None.</p>
96<H2>Description</H2>
97<P>The graphics processor (GP) can count many internal events that give detailed information on performance.&nbsp;This function sets the metric the vertex cache performance counter will measure. It is possible to monitor a particular attribute or all attributes using <em><strong><code>attr</code></strong></em>.</P>
98<P>To clear the counter cal <a href="GXClearVCacheMetric.html"><code>GXClearVCacheMetric</code></a>.&nbsp;To read the counter value, call to <a href="GXSetVCacheMetric.html"><code>GXReadVCacheMetric</code></a>.</P>
99<H3>Example</H3>
100<BLOCKQUOTE><code><font size="3">u32 chk, miss, stall;<br> <br> GXSetVCacheMetric(GX_VC_ALL);<br> GXClearVCacheMetric();<br> <br> // Draw Object(s)</font></code></BLOCKQUOTE>
101<BLOCKQUOTE><code><font size="3">// 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);</font></code></BLOCKQUOTE>
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106<h2>See Also</h2>
107
108<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>
109<H2>Revision History</H2>
110<P>03/01/2006 Initial version.</P>