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| <title>clGetEventProfilingInfo</title> |
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| </head> |
| <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="clGetEventProfilingInfo"></a> |
| <h1> |
| clGetEventProfilingInfo |
| </h1> |
| <p> |
| Returns profiling information for the command associated with event if profiling is enabled. |
| </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="_top">cl_int</a> |
| <strong class="fsfunc">clGetEventProfilingInfo</strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">event</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_profiling_info" target="_top">cl_profiling_info</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">param_name</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">param_value_size</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">void</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*param_value</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*param_value_size_ret</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">event</code> |
| </span> |
| </dt> |
| <dd> |
| <p>Specifies the event object.</p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">param_name</code> |
| </span> |
| </dt> |
| <dd> |
| <p>Specifies the profiling data to query. The list of supported <code class="varname">param_name</code> types and the information returned in <code class="varname">param_value</code> by <code class="function">clGetEventProfilingInfo</code> is described in the table of parameter queries below. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">param_value_size</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies the size in bytes of memory pointed to by <code class="varname">param_value</code>. |
| This size must be greater than or equal to the size of return type as described in the table bolow. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">param_value</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A pointer to memory where the appropriate result being queried is returned. If |
| <code class="varname">param_value</code> is NULL, it is ignored. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">param_value_size_ret</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Returns the actual size in bytes of data copied to <code class="varname">param_value</code>. If |
| <code class="varname">param_value_size_ret</code> is NULL, it is ignored. |
| </p> |
| </dd> |
| <dt></dt> |
| <dd> |
| <p> |
| The following is a table of <code class="function">clGetEventProfilingInfo</code> parameter queries |
| </p> |
| <div class="informaltable"> |
| <table border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| <col align="left" class="col3" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">cl_profiling_info</th> |
| <th align="left">Return Type</th> |
| <th align="left">Info. returned in <code class="varname">param_value</code></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_PROFILING_COMMAND_QUEUED</code> |
| </td> |
| <td align="left">cl_ulong</td> |
| <td align="left"> |
| A 64-bit value that describes the current |
| device time counter in nanoseconds when |
| the command identified by <code class="varname">event</code> is |
| enqueued in a command-queue by the |
| host. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_PROFILING_COMMAND_SUBMIT</code> |
| </td> |
| <td align="left">cl_ulong</td> |
| <td align="left"> |
| A 64-bit value that describes the current |
| device time counter in nanoseconds when |
| the command identified by <code class="varname">event</code> that has |
| been enqueued is submitted by the host to |
| the device associated with the command-queue. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_PROFILING_COMMAND_START</code> |
| </td> |
| <td align="left">cl_ulong</td> |
| <td align="left"> |
| A 64-bit value that describes the current |
| device time counter in nanoseconds when |
| the command identified by <code class="varname">event</code> starts |
| execution on the device. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_PROFILING_COMMAND_END</code> |
| </td> |
| <td align="left">cl_ulong</td> |
| <td align="left"> |
| A 64-bit value that describes the current |
| device time counter in nanoseconds when |
| the command identified by <code class="varname">event</code> has |
| finished execution on the device. |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| The unsigned 64-bit values returned can be used to measure the time in nano-seconds consumed |
| by OpenCL commands. |
| </p> |
| <p> |
| OpenCL devices are required to correctly track time across changes in device frequency and |
| power states. The <code class="constant">CL_DEVICE_PROFILING_TIMER_RESOLUTION</code> specifies the resolution of |
| the timer i.e. the number of nanoseconds elapsed before the timer is incremented. |
| </p> |
| <p> |
| Event objects can be used to capture profiling information that measure execution time of a |
| command. Profiling of OpenCL commands can be enabled either by using a command-queue |
| created with CL_QUEUE_PROFILING_ENABLE flag set in <code class="varname">properties</code> argument to |
| <a class="citerefentry" href="clCreateCommandQueue.html"><span class="citerefentry"><span class="refentrytitle">clCreateCommandQueue</span></span></a>. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p>Returns <span class="errorname">CL_SUCCESS</span> if the function is executed successfully and the profiling information has been recorded. 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_PROFILING_INFO_NOT_AVAILABLE</span> if the CL_QUEUE_PROFILING_ENABLE |
| flag is not set for the command-queue, if the execution status of the command identified |
| by <code class="varname">event</code> is not CL_COMPLETE or if <code class="varname">event</code> is a user event |
| object. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">param_name</code> is not valid, or if size in bytes |
| specified by <code class="varname">param_value_size</code> is less than the size of return type as described in the above |
| table and <code class="varname">param_value</code> is not NULL. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EVENT</span> if <code class="varname">event</code> is a not a valid event object. |
| </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="http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf#page=151" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="clCreateCommandQueue.html"><span class="citerefentry"><span class="refentrytitle">clCreateCommandQueue</span></span></a>, |
| <a class="citerefentry" href="clSetCommandQueueProperty.html"><span class="citerefentry"><span class="refentrytitle">clSetCommandQueueProperty</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 © 2007-2010 The Khronos Group Inc. |
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| 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 |
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