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<div class="subTitle">edu.rit.gpu</div>
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<h2 title="Interface Kernel" class="title">Interface Kernel</h2>
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</div>
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<pre>public interface <span class="strong">Kernel</span></pre>
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<div class="block">Interface Kernel specifies the base interface for a GPU kernel function.
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To use a GPU kernel function:
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<OL TYPE=1>
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<P><LI>
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Write the C or C++ code for a CUDA module containing one or more kernel
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functions to be executed on the GPU. The kernel function(s) must be declared
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to use "C" call syntax; for example:
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<BR><TT> extern "C" __global__ void foo (...)</TT>
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<BR>Compile the CUDA module using the <TT>nvcc</TT> compiler.
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<P><LI>
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For each kernel function in the CUDA module, write a <I>separate</I> Java
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interface, as follows.
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<UL>
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<LI>
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The interface name can be whatever you want.
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<LI>
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The interface must extend interface Kernel.
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<LI>
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The interface must declare <I>one and only one</I> method.
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<LI>
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The method's name must be identical to that of the kernel function. Suppose
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the method's name is <TT>foo</TT>.
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<LI>
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The <TT>foo</TT> method must return void.
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<LI>
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The <TT>foo</TT> method's arguments must appear in the same order as those
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of the kernel function.
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<LI>
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Declare each <TT>foo</TT> method argument's data type to correspond with the
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kernel function argument's data type as listed in the table below. (Kernel
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function arguments of other types are not supported at this time.)
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<P>
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<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0>
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<TR><TD><I>Java data type</I></TD><TD WIDTH=20> </TD><TD><I>C data type</I></TD></TR>
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<TR><TD><TT>boolean</TT></TD><TD WIDTH=20> </TD><TD><TT>int</TT></TD></TR>
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<TR><TD><TT>byte</TT></TD><TD WIDTH=20> </TD><TD><TT>char</TT>, <TT>unsigned char</TT></TD></TR>
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<TR><TD><TT>char</TT></TD><TD WIDTH=20> </TD><TD><TT>unsigned short int</TT></TD></TR>
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<TR><TD><TT>short</TT></TD><TD WIDTH=20> </TD><TD><TT>short int</TT>, <TT>unsigned short int</TT></TD></TR>
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<TR><TD><TT>int</TT></TD><TD WIDTH=20> </TD><TD><TT>int</TT>, <TT>unsigned int</TT></TD></TR>
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<TR><TD><TT>long</TT></TD><TD WIDTH=20> </TD><TD><TT>long long int</TT>, <TT>unsigned long long int</TT></TD></TR>
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<TR><TD><TT>float</TT></TD><TD WIDTH=20> </TD><TD><TT>float</TT></TD></TR>
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<TR><TD><TT>double</TT></TD><TD WIDTH=20> </TD><TD><TT>double</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuByteArray.html" title="class in edu.rit.gpu">GpuByteArray</a></TD><TD WIDTH=20> </TD><TD><TT>char*</TT>, <TT>unsigned char*</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuShortArray.html" title="class in edu.rit.gpu">GpuShortArray</a></TD><TD WIDTH=20> </TD><TD><TT>short int*</TT>, <TT>unsigned short int*</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuIntArray.html" title="class in edu.rit.gpu">GpuIntArray</a></TD><TD WIDTH=20> </TD><TD><TT>int*</TT>, <TT>unsigned int*</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuLongArray.html" title="class in edu.rit.gpu">GpuLongArray</a></TD><TD WIDTH=20> </TD><TD><TT>long long int*</TT>, <TT>unsigned long long int*</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuFloatArray.html" title="class in edu.rit.gpu">GpuFloatArray</a></TD><TD WIDTH=20> </TD><TD><TT>float*</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuDoubleArray.html" title="class in edu.rit.gpu">GpuDoubleArray</a></TD><TD WIDTH=20> </TD><TD><TT>double*</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuByteMatrix.html" title="class in edu.rit.gpu">GpuByteMatrix</a></TD><TD WIDTH=20> </TD><TD><TT>char**</TT>, <TT>unsigned char**</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuShortMatrix.html" title="class in edu.rit.gpu">GpuShortMatrix</a></TD><TD WIDTH=20> </TD><TD><TT>short int**</TT>, <TT>unsigned short int**</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuIntMatrix.html" title="class in edu.rit.gpu">GpuIntMatrix</a></TD><TD WIDTH=20> </TD><TD><TT>int**</TT>, <TT>unsigned int**</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuLongMatrix.html" title="class in edu.rit.gpu">GpuLongMatrix</a></TD><TD WIDTH=20> </TD><TD><TT>long long int**</TT>, <TT>unsigned long long int**</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuFloatMatrix.html" title="class in edu.rit.gpu">GpuFloatMatrix</a></TD><TD WIDTH=20> </TD><TD><TT>float**</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuDoubleMatrix.html" title="class in edu.rit.gpu">GpuDoubleMatrix</a></TD><TD WIDTH=20> </TD><TD><TT>double**</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuStructVbl.html" title="class in edu.rit.gpu">GpuStructVbl</a></TD><TD WIDTH=20> </TD><TD><TT>struct T*</TT></TD></TR>
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<TR><TD><a href="../../../edu/rit/gpu/GpuStructArray.html" title="class in edu.rit.gpu">GpuStructArray</a></TD><TD WIDTH=20> </TD><TD><TT>struct T*</TT></TD></TR>
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</TABLE>
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</UL>
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<P><LI>
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Call the <a href="../../../edu/rit/gpu/Gpu.html#getModule(java.lang.String)"><code>getModule()</code></a> method on a <a href="../../../edu/rit/gpu/Gpu.html" title="class in edu.rit.gpu">Gpu</a> object, specifying the name of the compiled CUDA module file
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relative to the Java class path. This returns a <a href="../../../edu/rit/gpu/Module.html" title="class in edu.rit.gpu">Module</a>
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object.
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<P><LI>
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Suppose the kernel function interface is named Bar. Call the <a href="../../../edu/rit/gpu/Module.html#getKernel(java.lang.Class)"><code>getKernel()</code></a> method on the <a href="../../../edu/rit/gpu/Module.html" title="class in edu.rit.gpu">Module</a> object, as follows:
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<BR><TT> Bar proxy = module.getKernel (Bar.class);</TT>
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<BR>This returns a reference to a proxy object that implements interface Bar.
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<P><LI>
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Configure the kernel by calling the <a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int)"><code>setGridDim()</code></a>,
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<a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int)"><code>setBlockDim()</code></a>, <a href="../../../edu/rit/gpu/Kernel.html#setCacheConfig(edu.rit.gpu.CacheConfig)"><code>setCacheConfig()</code></a>, and <a href="../../../edu/rit/gpu/Kernel.html#setDynamicSharedMemorySize(int)"><code>setDynamicSharedMemorySize()</code></a> methods on the Bar proxy object as necessary.
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<P><LI>
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Set the contents of any input variables (instances of <a href="../../../edu/rit/gpu/GpuVbl.html" title="class in edu.rit.gpu">GpuVbl</a> subclasses), and transfer these from host to device.
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<P><LI>
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Launch the kernel by calling the <TT>foo</TT> method on the Bar proxy object,
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passing in the desired argument values. The <TT>foo</TT> method returns when
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the kernel finishes.
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<P><LI>
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Transfer any output variables (instances of <a href="../../../edu/rit/gpu/GpuVbl.html" title="class in edu.rit.gpu">GpuVbl</a>
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subclasses) from device to host, and examine their contents.
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</OL>
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<P>
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Study the source code of the classes in package <a href="../../../edu/rit/gpu/example/package-summary.html">edu.rit.pj2.example</a> to see examples of Parallel Java 2
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GPU programs.
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<P>
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<I>Note:</I> A class that implements interface Kernel is not multiple
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thread safe. It is assumed that only one thread at a time will call methods
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on a Kernel object.</div>
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</li>
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</ul>
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</div>
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<div class="summary">
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<!-- ========== METHOD SUMMARY =========== -->
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</a>
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<h3>Method Summary</h3>
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<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int)">setBlockDim</a></strong>(int blockDimX)</code>
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<div class="block">Specify that this kernel function will be invoked with a one-dimensional
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block.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int, int)">setBlockDim</a></strong>(int blockDimX,
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int blockDimY)</code>
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<div class="block">Specify that this kernel function will be invoked with a two-dimensional
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block.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int, int, int)">setBlockDim</a></strong>(int blockDimX,
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int blockDimY,
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int blockDimZ)</code>
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<div class="block">Specify that this kernel function will be invoked with a
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three-dimensional block.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setCacheConfig(edu.rit.gpu.CacheConfig)">setCacheConfig</a></strong>(<a href="../../../edu/rit/gpu/CacheConfig.html" title="enum in edu.rit.gpu">CacheConfig</a> config)</code>
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<div class="block">Specify that this kernel function will be invoked with the given cache
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configuration.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setDynamicSharedMemorySize(int)">setDynamicSharedMemorySize</a></strong>(int bytesize)</code>
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<div class="block">Specify that this kernel function will be invoked with the given dynamic
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shared memory size.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int)">setGridDim</a></strong>(int gridDimX)</code>
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<div class="block">Specify that this kernel function will be invoked with a one-dimensional
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grid.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int, int)">setGridDim</a></strong>(int gridDimX,
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int gridDimY)</code>
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<div class="block">Specify that this kernel function will be invoked with a two-dimensional
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grid.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int, int, int)">setGridDim</a></strong>(int gridDimX,
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int gridDimY,
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int gridDimZ)</code>
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<div class="block">Specify that this kernel function will be invoked with a
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three-dimensional grid.</div>
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</td>
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</tr>
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</table>
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</li>
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</ul>
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</li>
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</ul>
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</div>
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<div class="details">
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<ul class="blockList">
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<li class="blockList">
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<!-- ============ METHOD DETAIL ========== -->
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<ul class="blockList">
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<li class="blockList"><a name="method_detail">
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</a>
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<h3>Method Detail</h3>
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<a name="setGridDim(int)">
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<h4>setGridDim</h4>
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<pre>void setGridDim(int gridDimX)</pre>
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<div class="block">Specify that this kernel function will be invoked with a one-dimensional
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grid. If not specified, the default is a one-dimensional grid with
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<TT>gridDimX</TT> = 1.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>gridDimX</code> - Grid X dimension (≥ 1).</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>gridDimX</TT> < 1.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int, int)"><code>setGridDim(int,int)</code></a>,
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<a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int, int, int)"><code>setGridDim(int,int,int)</code></a></dd></dl>
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</li>
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</ul>
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<a name="setGridDim(int, int)">
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<h4>setGridDim</h4>
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<pre>void setGridDim(int gridDimX,
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int gridDimY)</pre>
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<div class="block">Specify that this kernel function will be invoked with a two-dimensional
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grid. If not specified, the default is a one-dimensional grid with
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<TT>gridDimX</TT> = 1.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>gridDimX</code> - Grid X dimension (≥ 1).</dd><dd><code>gridDimY</code> - Grid Y dimension (≥ 1).</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>gridDimX</TT> < 1 or
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<TT>gridDimY</TT> < 1.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int)"><code>setGridDim(int)</code></a>,
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<a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int, int, int)"><code>setGridDim(int,int,int)</code></a></dd></dl>
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</li>
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<h4>setGridDim</h4>
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<pre>void setGridDim(int gridDimX,
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int gridDimY,
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int gridDimZ)</pre>
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<div class="block">Specify that this kernel function will be invoked with a
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three-dimensional grid. If not specified, the default is a
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one-dimensional grid with <TT>gridDimX</TT> = 1.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>gridDimX</code> - Grid X dimension (≥ 1).</dd><dd><code>gridDimY</code> - Grid Y dimension (≥ 1).</dd><dd><code>gridDimZ</code> - Grid Z dimension (≥ 1).</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>gridDimX</TT> < 1 or
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<TT>gridDimY</TT> < 1 or <TT>gridDimZ</TT> < 1.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int)"><code>setGridDim(int)</code></a>,
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<a href="../../../edu/rit/gpu/Kernel.html#setGridDim(int, int)"><code>setGridDim(int,int)</code></a></dd></dl>
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<h4>setBlockDim</h4>
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<pre>void setBlockDim(int blockDimX)</pre>
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<div class="block">Specify that this kernel function will be invoked with a one-dimensional
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block. If not specified, the default is a one-dimensional block with
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<TT>blockDimX</TT> = 1.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>blockDimX</code> - Block X dimension (≥ 1).</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>blockDimX</TT> < 1.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int, int)"><code>setBlockDim(int,int)</code></a>,
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<a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int, int, int)"><code>setBlockDim(int,int,int)</code></a></dd></dl>
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<h4>setBlockDim</h4>
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<pre>void setBlockDim(int blockDimX,
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int blockDimY)</pre>
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<div class="block">Specify that this kernel function will be invoked with a two-dimensional
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block. If not specified, the default is a one-dimensional block with
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<TT>blockDimX</TT> = 1.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>blockDimX</code> - Block X dimension (≥ 1).</dd><dd><code>blockDimY</code> - Block Y dimension (≥ 1).</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>blockDimX</TT> < 1 or
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<TT>blockDimY</TT> < 1.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int)"><code>setBlockDim(int)</code></a>,
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<a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int, int, int)"><code>setBlockDim(int,int,int)</code></a></dd></dl>
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</li>
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</ul>
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<a name="setBlockDim(int, int, int)">
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<h4>setBlockDim</h4>
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<pre>void setBlockDim(int blockDimX,
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int blockDimY,
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int blockDimZ)</pre>
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<div class="block">Specify that this kernel function will be invoked with a
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three-dimensional block. If not specified, the default is a
|
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one-dimensional block with <TT>blockDimX</TT> = 1.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>blockDimX</code> - Block X dimension (≥ 1).</dd><dd><code>blockDimY</code> - Block Y dimension (≥ 1).</dd><dd><code>blockDimZ</code> - Block Z dimension (≥ 1).</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>blockDimX</TT> < 1 or
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<TT>blockDimY</TT> < 1 or <TT>blockDimZ</TT> < 1.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int)"><code>setBlockDim(int)</code></a>,
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<a href="../../../edu/rit/gpu/Kernel.html#setBlockDim(int, int)"><code>setBlockDim(int,int)</code></a></dd></dl>
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</li>
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<a name="setCacheConfig(edu.rit.gpu.CacheConfig)">
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<h4>setCacheConfig</h4>
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<pre>void setCacheConfig(<a href="../../../edu/rit/gpu/CacheConfig.html" title="enum in edu.rit.gpu">CacheConfig</a> config)</pre>
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<div class="block">Specify that this kernel function will be invoked with the given cache
|
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configuration. If not specified, the default is to use the GPU's cache
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configuration setting.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>config</code> - Cache configuration.</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - (unchecked exception) Thrown if <TT>config</TT> is null.</dd>
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<dd><code><a href="../../../edu/rit/gpu/GpuException.html" title="class in edu.rit.gpu">GpuException</a></code> - (unchecked exception) Thrown if a GPU error occurred.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../edu/rit/gpu/Gpu.html#setCacheConfig(edu.rit.gpu.CacheConfig)"><code>Gpu.setCacheConfig(CacheConfig)</code></a></dd></dl>
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<a name="setDynamicSharedMemorySize(int)">
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<h4>setDynamicSharedMemorySize</h4>
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<pre>void setDynamicSharedMemorySize(int bytesize)</pre>
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<div class="block">Specify that this kernel function will be invoked with the given dynamic
|
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shared memory size. If not specified, the default is 0.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>bytesize</code> - Number of dynamic shared memory bytes (≥ 0).</dd>
|
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<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>bytesize</TT> < 0.</dd></dl>
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</ul>
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<p class="legalCopy"><small><FONT SIZE="-2">Copyright © 2013–2016 by Alan Kaminsky. All rights reserved. Send comments to ark</FONT><FONT SIZE="1" COLOR="#FFFFFF">­</FONT><FONT SIZE="-2">@</FONT><FONT SIZE="1" COLOR="#FFFFFF">­</FONT><FONT SIZE="-2">cs.rit.edu.</FONT></small></p>
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