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| <title>Shared Virtual Memory</title> |
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| </head> |
| <body> |
| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <h1>Shared Virtual Memory (SVM) Functions</h1> |
| <p>Click an item in the table below for details about that function.</p> |
| </div> |
| <div class="refsect1"> |
| <a id="springboard"></a> |
| <h2></h2> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <a class="citerefentry" href="clSVMAlloc.html"> |
| <span class="citerefentry"> |
| <span class="refentrytitle">clSVMAlloc</span> |
| </span> |
| </a> |
| </td> |
| <td align="left">Allocates a shared virtual memory buffer</td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <a class="citerefentry" href="clSVMFree.html"> |
| <span class="citerefentry"> |
| <span class="refentrytitle">clSVMFree</span> |
| </span> |
| </a> |
| </td> |
| <td align="left">Frees a shared virtual memory buffer</td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <a class="citerefentry" href="clEnqueueSVMFree.html"> |
| <span class="citerefentry"> |
| <span class="refentrytitle">clEnqueueSVMFree</span> |
| </span> |
| </a> |
| </td> |
| <td align="left"> |
| Enqueues a command to free the shared virtual memory allocated using |
| <a class="citerefentry" href="clSVMAlloc.html"><span class="citerefentry"><span class="refentrytitle">clSVMAlloc</span></span></a> |
| or a shared system memory pointer |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <a class="citerefentry" href="clEnqueueSVMMemcpy.html"> |
| <span class="citerefentry"> |
| <span class="refentrytitle">clEnqueueSVMMemcpy</span> |
| </span> |
| </a> |
| </td> |
| <td align="left">Enqueues a command to do a memcpy operation</td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <a class="citerefentry" href="clEnqueueSVMMemFill.html"> |
| <span class="citerefentry"> |
| <span class="refentrytitle">clEnqueueSVMMemFill</span> |
| </span> |
| </a> |
| </td> |
| <td align="left">Enqueues a command to fill a region in memory with a pattern of a given pattern size</td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <a class="citerefentry" href="clEnqueueSVMMap.html"> |
| <span class="citerefentry"> |
| <span class="refentrytitle">clEnqueueSVMMap</span> |
| </span> |
| </a> |
| </td> |
| <td align="left">Enqueues a command that will allow the host to update a region of a SVM buffer</td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <a class="citerefentry" href="clEnqueueSVMUnmap.html"> |
| <span class="citerefentry"> |
| <span class="refentrytitle">clEnqueueSVMUnmap</span> |
| </span> |
| </a> |
| </td> |
| <td align="left">Enqueues a command to indicate that the host has completed updating a specified region</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| Shared Virtual Memory (SVM) (Glossary): An address space exposed to both the host and the devices |
| within a context. SVM causes addresses to be meaningful between the host and all of the devices |
| within a context and therefore supports the use of pointer based data structures in OpenCL |
| kernels. It logically extends a portion of the global memory into the host address space therefore |
| giving work-items access to the host address space. There are three types of SVM in OpenCL |
| Coarse-Grained buffer SVM: Sharing occurs at the granularity of regions of OpenCL buffer |
| memory objects. Fine-Grained buffer SVM: Sharing occurs at the granularity of individual |
| loads/stores into bytes within OpenCL buffer memory objects. Fine-Grained system SVM: |
| Sharing occurs at the granularity of individual loads/stores into bytes occurring anywhere within |
| the host memory. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="specification"></a> |
| <h2>Specification</h2> |
| <p> |
| <img src="pdficon_small1.gif" /> |
| |
| <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1.pdf#page=174" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2015 The Khronos Group Inc. |
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