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| <title>clEnqueueSVMMigrateMem</title> |
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| <body> |
| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clEnqueueSVMMigrateMem"></a> |
| <h1> |
| clEnqueueSVMMigrateMem |
| </h1> |
| <p> |
| Enqueues a command to indicate which device a set of ranges of SVM allocations should be associated with. |
| </p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2></h2> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_int</a> |
| <strong class="fsfunc">clEnqueueSVMMigrateMem</strong> |
| (</code> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_command_queue</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">command_queue</var> |
| , </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_svm_pointers</var> |
| , </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">void</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">**svm_pointers</var> |
| , </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*sizes</var> |
| , </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html" target="pagedisplay">cl_mem_migration_flags</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">flags</var> |
| , </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_events_in_wait_list</var> |
| , </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event_wait_list</var> |
| , </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event</var> |
| <code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="parameters"></a> |
| <h2>Parameters</h2> |
| <div class="variablelist"> |
| <dl class="variablelist"> |
| <dt> |
| <span class="term"> <code class="varname"> command_queue </code> </span> |
| </dt> |
| <dd> |
| <p> |
| A valid host command queue. The specified set of allocation ranges will be |
| migrated to the OpenCL device associated with <code class="varname">command_queue</code>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname">num_svm_pointers</code> </span> |
| </dt> |
| <dd> |
| <p> |
| The number of pointers in the specified |
| <code class="varname">svm_pointers</code> array, and the number |
| of sizes in the <code class="varname">sizes</code> |
| array, if <code class="varname">sizes</code> is not NULL. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname">svm_pointers</code> </span> |
| </dt> |
| <dd> |
| <p> |
| A pointer to an array of pointers. Each pointer in this array must be within an |
| allocation produced by a call to |
| <a class="citerefentry" href="clSVMAlloc.html"><span class="citerefentry"><span class="refentrytitle">clSVMAlloc</span></span></a>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname">sizes</code> </span> |
| </dt> |
| <dd> |
| <p> |
| An array of sizes. The pair <code class="varname">svm_pointers</code>[i] |
| and <code class="varname">sizes</code>[i] together define the starting address |
| and number of bytes in a range to be migrated. |
| <code class="varname">sizes</code> may be NULL indicating that every |
| allocation containing any <code class="varname">svm_pointer</code>[i] |
| is to be migrated. Also, if <code class="varname">sizes</code>[i] is zero, then the entire |
| allocation containing <code class="varname">svm_pointer</code>[i] is migrated. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname">flags</code> </span> |
| </dt> |
| <dd> |
| <p> |
| A bit-field that is used to specify migration options. |
| Table 5.12 describes the possible |
| values for <code class="varname">flags</code>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| event_wait_list |
| ,</code> |
| <code class="varname"> |
| num_events_in_wait_list |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Specify events that need to complete before this particular |
| command can be executed. If <code class="varname">event_wait_list</code> |
| is NULL, then this particular command does not wait on any |
| event to complete. If <code class="varname">event_wait_list</code> is |
| NULL, <code class="varname">num_events_in_wait_list</code> must be 0. If |
| <code class="varname">event_wait_list</code> is not NULL, the list of events |
| pointed to by <code class="varname">event_wait_list</code> must be valid |
| and <code class="varname">num_events_in_wait_list</code> must be greater |
| than 0. The events specified in <code class="varname">event_wait_list</code> |
| act as synchronization points. The context associated with events in |
| <code class="varname">event_wait_list</code> and <code class="varname">command_queue</code> must |
| be the same. The memory associated with <code class="varname">event_wait_list</code> |
| can be reused or freed after the function returns. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> event </code> </span> |
| </dt> |
| <dd> |
| <p> |
| Returns an event object that identifies this particular write |
| command and can be used to query or queue a wait for this particular |
| command to complete. <code class="varname">event</code> can be NULL in |
| which case it will not be possible for the application to query the |
| status of this command or queue another command that waits for this command to complete. |
| If the <code class="varname">event_wait_list</code> |
| and the <code class="varname">event</code> arguments are not NULL, the |
| <code class="varname">event</code> argument should not refer to an element of the |
| <code class="varname">event_wait_list</code> array. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| Enqueues a command to indicate which device a |
| set of ranges of SVM allocations should be |
| associated with. Once the event returned by |
| <code class="function">clEnqueueSVMMigrateMem</code> |
| has become <code class="constant">CL_COMPLETE</code>, the |
| ranges specified by <code class="varname">svm pointers</code> and <code class="varname">sizes</code> |
| have been successfully migrated to the device |
| associated with <code class="varname">command queue</code>. |
| </p> |
| <p> |
| The user is responsible for managing the event dependencies associated with this command in |
| order to avoid overlapping access to SVM allocations. Improperly specified event dependencies |
| passed to <code class="function">clEnqueueSVMMigrateMem</code> could result in undefined |
| results. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| <code class="function">clEnqueueSVMMigrateMem</code> returns <span class="errorname">CL_SUCCESS</span> if |
| the function is executed successfully. Otherwise, it returns one of the following errors. |
| </p> |
| <div class="itemizedlist"> |
| <ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_COMMAND_QUEUE</span> if <code class="varname">command_queue</code> |
| is not a valid host command-queue. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if the context associated with |
| <code class="varname">command_queue</code> and events in |
| <code class="varname">event_wait_list</code> are not the same. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">num_svm_pointers</code> |
| is zero or <code class="varname">svm_pointers</code> is NULL. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if |
| <code class="varname">sizes</code>[i] is non-zero |
| range [<code class="varname">svm_pointers</code>[i], |
| <code class="varname">svm_pointers</code>[i]+<code class="varname">sizes</code>[i]) |
| is not contained within an existing |
| <a class="citerefentry" href="clSVMAlloc.html"><span class="citerefentry"><span class="refentrytitle">clSVMAlloc</span></span></a> |
| allocation. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EVENT_WAIT_LIST</span> |
| if <code class="varname">event_wait_list</code> is NULL and |
| <code class="varname">num_events_in_wait_list</code> > 0, |
| or <code class="varname">event_wait_list</code> is not NULL and |
| <code class="varname">num_events_in_wait_list</code> is 0, or if event objects in |
| <code class="varname">event_wait_list</code> are not valid events. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there is a failure to allocate |
| resources required by the OpenCL implementation on the device. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure to allocate |
| resources required by the OpenCL implementation on the host. |
| </li> |
| </ul> |
| </div> |
| </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#namedest=clEnqueueSVMMigrateMem" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="sharedVirtualMemory.html"><span class="citerefentry"><span class="refentrytitle">Shared Virtual Memory Functions</span></span></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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