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<div class="title">viennacl-info.cpp</div> </div>
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<p>This tutorial prints informations about the OpenCL backend and therefore only works with OpenCL enabled. See the <a class="el" href="classviennacl_1_1ocl_1_1device.html" title="A class representing a compute device (e.g. a GPU) ">viennacl::ocl::device</a> class for full information about which information can be queried from devices.</p>
<p>We start with including required headers: </p>
<div class="fragment"><div class="line"><span class="comment">// include necessary system headers</span></div>
<div class="line"><span class="preprocessor">#include <iostream></span></div>
<div class="line"><span class="preprocessor">#include <cstdlib></span></div>
<div class="line"></div>
<div class="line"><span class="comment">//include ViennaCL headers</span></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="device_8hpp.html">viennacl/ocl/device.hpp</a>"</span></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="platform_8hpp.html">viennacl/ocl/platform.hpp</a>"</span></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="device__specific_2builtin__database_2common_8hpp.html">viennacl/device_specific/builtin_database/common.hpp</a>"</span></div>
</div><!-- fragment --><p> In the <a class="el" href="tests_2src_2bisect_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main()</a> routine we iterate over all OpenCL platforms and print the full device information for each OpenCL device found. </p>
<div class="fragment"><div class="line"><span class="keywordtype">int</span> <a name="a0"></a><a class="code" href="tests_2src_2bisect_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>()</div>
<div class="line">{</div>
</div><!-- fragment --><p> Retrieve the platforms and iterate: </p>
<div class="fragment"><div class="line"><span class="keyword">typedef</span> std::vector< viennacl::ocl::platform > platforms_type;</div>
<div class="line">platforms_type platforms = <a name="a1"></a><a class="code" href="namespaceviennacl_1_1ocl.html#ae1e931f6efd155240b33ca440dfcfef5">viennacl::ocl::get_platforms</a>();</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">bool</span> is_first_element = <span class="keyword">true</span>;</div>
<div class="line"><span class="keywordflow">for</span> (platforms_type::iterator platform_iter = platforms.begin();</div>
<div class="line"> platform_iter != platforms.end();</div>
<div class="line"> ++platform_iter)</div>
<div class="line">{</div>
<div class="line"> <span class="keyword">typedef</span> std::vector<viennacl::ocl::device> devices_type;</div>
<div class="line"> devices_type devices = platform_iter->devices(CL_DEVICE_TYPE_ALL);</div>
</div><!-- fragment --><p> Print some platform information </p>
<div class="fragment"><div class="line">std::cout << <span class="stringliteral">"# ========================================="</span> << std::endl;</div>
<div class="line">std::cout << <span class="stringliteral">"# Platform Information "</span> << std::endl;</div>
<div class="line">std::cout << <span class="stringliteral">"# ========================================="</span> << std::endl;</div>
<div class="line"></div>
<div class="line">std::cout << <span class="stringliteral">"#"</span> << std::endl;</div>
<div class="line">std::cout << <span class="stringliteral">"# Vendor and version: "</span> << platform_iter->info() << std::endl;</div>
<div class="line">std::cout << <span class="stringliteral">"#"</span> << std::endl;</div>
<div class="line"></div>
<div class="line"><span class="keywordflow">if</span> (is_first_element)</div>
<div class="line">{</div>
<div class="line"> std::cout << <span class="stringliteral">"# ViennaCL uses this OpenCL platform by default."</span> << std::endl;</div>
<div class="line"> is_first_element = <span class="keyword">false</span>;</div>
<div class="line">}</div>
</div><!-- fragment --><p> Traverse the devices and print all information available using the convenience member function full_info(): </p>
<div class="fragment"><div class="line"> std::cout << <span class="stringliteral">"# "</span> << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"# Available Devices: "</span> << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"# "</span> << std::endl;</div>
<div class="line"> <span class="keywordflow">for</span> (devices_type::iterator iter = devices.begin(); iter != devices.end(); iter++)</div>
<div class="line"> {</div>
<div class="line"> std::cout << std::endl;</div>
<div class="line"></div>
<div class="line"> std::cout << <span class="stringliteral">" -----------------------------------------"</span> << std::endl;</div>
<div class="line"> std::cout << iter->full_info();</div>
<div class="line"> std::cout << <span class="stringliteral">"ViennaCL Device Architecture: "</span> << iter->architecture_family() << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"ViennaCL Database Mapped Name: "</span> << <a name="a2"></a><a class="code" href="namespaceviennacl_1_1device__specific_1_1builtin__database.html#a95ff5245e4bc95912528d86219bb8bde">viennacl::device_specific::builtin_database::get_mapped_device_name</a>(iter->name(), iter->vendor_id()) << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">" -----------------------------------------"</span> << std::endl;</div>
<div class="line"> }</div>
<div class="line"> std::cout << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"###########################################"</span> << std::endl;</div>
<div class="line"> std::cout << std::endl;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> EXIT_SUCCESS;</div>
<div class="line">}</div>
</div><!-- fragment --> <h2>Full Example Code</h2>
<div class="fragment"><div class="line"><span class="comment">/* =========================================================================</span></div>
<div class="line"><span class="comment"> Copyright (c) 2010-2016, Institute for Microelectronics,</span></div>
<div class="line"><span class="comment"> Institute for Analysis and Scientific Computing,</span></div>
<div class="line"><span class="comment"> TU Wien.</span></div>
<div class="line"><span class="comment"> Portions of this software are copyright by UChicago Argonne, LLC.</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment"> -----------------</span></div>
<div class="line"><span class="comment"> ViennaCL - The Vienna Computing Library</span></div>
<div class="line"><span class="comment"> -----------------</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment"> Project Head: Karl Rupp rupp@iue.tuwien.ac.at</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment"> (A list of authors and contributors can be found in the PDF manual)</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment"> License: MIT (X11), see file LICENSE in the base directory</span></div>
<div class="line"><span class="comment">============================================================================= */</span></div>
<div class="line"></div>
<div class="line"><span class="comment">// include necessary system headers</span></div>
<div class="line"><span class="preprocessor">#include <iostream></span></div>
<div class="line"><span class="preprocessor">#include <cstdlib></span></div>
<div class="line"></div>
<div class="line"><span class="comment">//include ViennaCL headers</span></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="device_8hpp.html">viennacl/ocl/device.hpp</a>"</span></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="platform_8hpp.html">viennacl/ocl/platform.hpp</a>"</span></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="device__specific_2builtin__database_2common_8hpp.html">viennacl/device_specific/builtin_database/common.hpp</a>"</span></div>
<div class="line"></div>
<div class="line"><span class="keywordtype">int</span> <a class="code" href="tests_2src_2bisect_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>()</div>
<div class="line">{</div>
<div class="line"> <span class="keyword">typedef</span> std::vector< viennacl::ocl::platform > platforms_type;</div>
<div class="line"> platforms_type platforms = <a class="code" href="namespaceviennacl_1_1ocl.html#ae1e931f6efd155240b33ca440dfcfef5">viennacl::ocl::get_platforms</a>();</div>
<div class="line"></div>
<div class="line"> <span class="keywordtype">bool</span> is_first_element = <span class="keyword">true</span>;</div>
<div class="line"> <span class="keywordflow">for</span> (platforms_type::iterator platform_iter = platforms.begin();</div>
<div class="line"> platform_iter != platforms.end();</div>
<div class="line"> ++platform_iter)</div>
<div class="line"> {</div>
<div class="line"> <span class="keyword">typedef</span> std::vector<viennacl::ocl::device> devices_type;</div>
<div class="line"> devices_type devices = platform_iter->devices(CL_DEVICE_TYPE_ALL);</div>
<div class="line"></div>
<div class="line"> std::cout << <span class="stringliteral">"# ========================================="</span> << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"# Platform Information "</span> << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"# ========================================="</span> << std::endl;</div>
<div class="line"></div>
<div class="line"> std::cout << <span class="stringliteral">"#"</span> << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"# Vendor and version: "</span> << platform_iter->info() << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"#"</span> << std::endl;</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (is_first_element)</div>
<div class="line"> {</div>
<div class="line"> std::cout << <span class="stringliteral">"# ViennaCL uses this OpenCL platform by default."</span> << std::endl;</div>
<div class="line"> is_first_element = <span class="keyword">false</span>;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"></div>
<div class="line"> std::cout << <span class="stringliteral">"# "</span> << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"# Available Devices: "</span> << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"# "</span> << std::endl;</div>
<div class="line"> <span class="keywordflow">for</span> (devices_type::iterator iter = devices.begin(); iter != devices.end(); iter++)</div>
<div class="line"> {</div>
<div class="line"> std::cout << std::endl;</div>
<div class="line"></div>
<div class="line"> std::cout << <span class="stringliteral">" -----------------------------------------"</span> << std::endl;</div>
<div class="line"> std::cout << iter->full_info();</div>
<div class="line"> std::cout << <span class="stringliteral">"ViennaCL Device Architecture: "</span> << iter->architecture_family() << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"ViennaCL Database Mapped Name: "</span> << <a class="code" href="namespaceviennacl_1_1device__specific_1_1builtin__database.html#a95ff5245e4bc95912528d86219bb8bde">viennacl::device_specific::builtin_database::get_mapped_device_name</a>(iter->name(), iter->vendor_id()) << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">" -----------------------------------------"</span> << std::endl;</div>
<div class="line"> }</div>
<div class="line"> std::cout << std::endl;</div>
<div class="line"> std::cout << <span class="stringliteral">"###########################################"</span> << std::endl;</div>
<div class="line"> std::cout << std::endl;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> EXIT_SUCCESS;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"></div>
<div class="line"></div>
</div><!-- fragment --> </div><!-- contents -->
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