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| <refentry> |
| <refentryinfo> |
| <keywordset> |
| <keyword>Shared Virtual Memory</keyword> |
| </keywordset> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>Shared Virtual Memory</refentrytitle> |
| |
| <refmiscinfo> |
| <copyright> |
| <year>2007-2013</year> |
| <holder>The Khronos Group Inc. |
| Permission is hereby granted, free of charge, to any person obtaining a |
| copy of this software and/or associated documentation files (the |
| "Materials"), to deal in the Materials without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Materials, and to |
| permit persons to whom the Materials are furnished to do so, subject to |
| the condition that this copyright notice and permission notice shall be included |
| in all copies or substantial portions of the Materials.</holder> |
| </copyright> |
| </refmiscinfo> |
| <manvolnum>3</manvolnum> |
| </refmeta> |
| |
| <!-- ================================ SYNOPSIS --> |
| |
| <refnamediv> |
| <refname>Shared Virtual Memory (SVM) Functions</refname> |
| <refpurpose>Click an item in the table below for details about that function.</refpurpose> |
| </refnamediv> |
| |
| <refsect1 id="springboard"><title></title> |
| <informaltable frame="all"><tgroup cols="2" align="left" colsep="1" rowsep="1"> |
| <colspec colnum="1" colwidth="2*" colname="col1" /> |
| <colspec colnum="2" colwidth="8*" colname="col2" /> |
| <tbody> |
| |
| <row> |
| <entry><citerefentry><refentrytitle>clSVMAlloc</refentrytitle></citerefentry></entry> |
| <entry>Allocates a shared virtual memory buffer</entry> |
| </row> |
| |
| <row> |
| <entry><citerefentry><refentrytitle>clSVMFree</refentrytitle></citerefentry></entry> |
| <entry>Frees a shared virtual memory buffer</entry> |
| </row> |
| |
| <row> |
| <entry><citerefentry><refentrytitle>clEnqueueSVMFree</refentrytitle></citerefentry></entry> |
| <entry> |
| Enqueues a command to free the shared virtual memory allocated using |
| <citerefentry><refentrytitle>clSVMAlloc</refentrytitle></citerefentry> |
| or a shared system memory pointer |
| </entry> |
| </row> |
| |
| <row> |
| <entry><citerefentry><refentrytitle>clEnqueueSVMMemcpy</refentrytitle></citerefentry></entry> |
| <entry>Enqueues a command to do a memcpy operation</entry> |
| </row> |
| |
| <row> |
| <entry><citerefentry><refentrytitle>clEnqueueSVMMemFill</refentrytitle></citerefentry></entry> |
| <entry>Enqueues a command to fill a region in memory with a pattern of a given pattern size</entry> |
| </row> |
| |
| <row> |
| <entry><citerefentry><refentrytitle>clEnqueueSVMMap</refentrytitle></citerefentry></entry> |
| <entry>Enqueues a command that will allow the host to update a region of a SVM buffer</entry> |
| </row> |
| |
| <row> |
| <entry><citerefentry><refentrytitle>clEnqueueSVMUnmap</refentrytitle></citerefentry></entry> |
| <entry>Enqueues a command to indicate that the host has completed updating a specified region</entry> |
| </row> |
| |
| </tbody> |
| </tgroup> |
| </informaltable> |
| |
| </refsect1> |
| |
| |
| <!-- ================================ DESCRIPTION --> |
| |
| <refsect1 id="description"><title>Description</title> |
| <para> |
| 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. |
| </para> |
| </refsect1> |
| |
| <!-- ================================ EXAMPLE --> |
| <!-- DO NOT DELETE IN CASE AN EXAMPLE IS ADDED IN THE FUTURE --> |
| <!-- |
| <refsect2 id="example1"> |
| <title> |
| Example |
| </title> |
| |
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| <tbody> |
| <row> |
| <entry> |
| Example goes here - it will be set in "code" type with white space preserved. |
| </entry> |
| </row> |
| </tbody> |
| </tgroup> |
| </informaltable> |
| </refsect2> |
| --> |
| |
| <!-- ================================ SPECIFICATION --> |
| <!-- Set the "uri" attribute in the <olink /> element to the "named destination" for the PDF page |
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| <refsect1 id="specification"><title>Specification</title> |
| <para> |
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| <imagedata fileref="pdficon_small1.gif" format="gif" /> |
| </imageobject> |
| |
| <olink uri="sharedVirtualMemory">OpenCL Specification</olink> |
| </para> |
| </refsect1> |
| |
| <!-- ================================ ALSO SEE --> |
| |
| <!-- |
| <refsect1 id="seealso"><title>Also see</title> |
| <para> |
| <citerefentry><refentrytitle>EXTENSION</refentrytitle></citerefentry>, |
| </para> |
| </refsect1> |
| --> |
| |
| <!-- ============================== COPYRIGHT --> |
| <!-- Content included from copyright.inc.xsl --> |
| |
| <refsect3 id="Copyright"><title></title> |
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| <imagedata fileref="KhronosLogo.jpg" format="jpg" /> |
| </imageobject> |
| <para /> |
| </refsect3> |
| |
| <!-- 28-Oct-2015, API ver 2.1 rev 19 --> |
| </refentry> |
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