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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

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<title>ArrayFire: benchmarks/blas.cpp</title>

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<div id="projectbrief">A high-performance general-purpose compute library</div>

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<li><a href="tutorials.htm"><span>Tutorials</span></a></li>

<li><a href="modules.htm"><span>Functions</span></a></li>

<li><a href="releasenotes.htm"><span>Release Notes</span></a></li>

<li><a href="examples.htm"><span>Examples</span></a></li>

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/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */

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<div class="headertitle"><div class="title">benchmarks/blas.cpp</div></div>

</div>

<div class="line"><span class="comment"> * This file is distributed under 3-clause BSD license.</span></div>

<div class="line"><span class="comment"> * The complete license agreement can be obtained at:</span></div>

<div class="line"><span class="comment"> * http://arrayfire.com/licenses/BSD-3-Clause</span></div>

<div class="line"><span class="preprocessor">#include <<a class="code" href="arrayfire_8h.htm">arrayfire.h</a>></span></div>

<div class="line"><span class="preprocessor">#include <math.h></span></div>

<div class="line"><span class="preprocessor">#include <stdio.h></span></div>

<div class="line"><span class="preprocessor">#include <cstdlib></span></div>

<div class="line"><span class="preprocessor">#include <string></span></div>

<div class="line"><span class="keyword">using namespace </span><a class="code hl_namespace" href="namespaceaf.htm">af</a>;</div>

<div class="line"><span class="comment">// create a small wrapper to benchmark</span></div>

<div class="line"><span class="keyword">static</span> <a id="_a0" name="_a0"></a><a class="code hl_class" href="classaf_1_1array.htm">array</a> A; <span class="comment">// populated before each timing</span></div>

<div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> fn() {</div>

<div class="line"> <a class="code hl_class" href="classaf_1_1array.htm">array</a> B = matmul(A, A); <span class="comment">// matrix multiply</span></div>

<div class="line"> <span class="keywordtype">double</span> peak = 0;</div>

<div class="line"> <span class="keywordtype">int</span> device = argc > 1 ? atoi(argv[1]) : 0;</div>

<div class="line"> setDevice(device);</div>

<div class="line"> <span class="keyword">const</span> std::string <a class="code hl_enumeration" href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5">dtype</a>(argc > 2 ? argv[2] : <span class="stringliteral">"f32"</span>);</div>

<div class="line"> <span class="keyword">const</span> <a class="code hl_enumeration" href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5">af_dtype</a> dt = (<a class="code hl_enumeration" href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5">dtype</a> == <span class="stringliteral">"f16"</span> ? <a id="a1" name="a1"></a><a class="code hl_enumvalue" href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5af4512c88801326ab48816bf6ece20d67">f16</a> : <a id="a2" name="a2"></a><a class="code hl_enumvalue" href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5a82ea90203678bdd0b547068f0a76524b">f32</a>);</div>

<div class="line"> printf(<span class="stringliteral">"Device %d isHalfAvailable ? %s\n"</span>, device,</div>

<div class="line"> isHalfAvailable(device) ? <span class="stringliteral">"yes"</span> : <span class="stringliteral">"no"</span>);</div>

<div class="line"> printf(<span class="stringliteral">"Benchmark N-by-N matrix multiply at %s \n"</span>, <a class="code hl_enumeration" href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5">dtype</a>.c_str());</div>

<div class="line"> printf(<span class="stringliteral">"%4d x %4d: "</span>, n, n);</div>

<div class="line"> A = constant(1, n, n, dt);</div>

<div class="line"> <span class="keywordtype">double</span> time = timeit(fn); <span class="comment">// time in seconds</span></div>

<div class="line"> <span class="keywordtype">double</span> gflops = 2.0 * powf(n, 3) / (time * 1e9);</div>

<div class="line"> <span class="keywordflow">if</span> (gflops > peak) peak = gflops;</div>

<div class="line"> printf(<span class="stringliteral">" %4.0f Gflops\n"</span>, gflops);</div>

<div class="line"> fflush(stdout);</div>

<div class="line"> } <span class="keywordflow">catch</span> (<a id="_a3" name="_a3"></a><a class="code hl_class" href="classaf_1_1exception.htm">af::exception</a>& e) {</div>

<div class="line"> fprintf(stderr, <span class="stringliteral">"%s\n"</span>, e.<a id="a4" name="a4"></a><a class="code hl_function" href="classaf_1_1exception.htm#aa884ff67408851f00e50cf971a4dfd05">what</a>());</div>

<div class="line"> <span class="keywordflow">throw</span>;</div>

<div class="line"> printf(<span class="stringliteral">" ### peak %g GFLOPS\n"</span>, peak);</div>

<div class="line"> <span class="keywordflow">return</span> 0;</div>

<div class="ttc" id="aarrayfire_8h_htm"><div class="ttname"><a href="arrayfire_8h.htm">arrayfire.h</a></div></div>

<div class="ttc" id="aclassaf_1_1array_htm"><div class="ttname"><a href="classaf_1_1array.htm">af::array</a></div><div class="ttdoc">A multi dimensional data container.</div><div class="ttdef"><b>Definition:</b> <a href="array_8h_source.htm#l00037">array.h:37</a></div></div>

<div class="ttc" id="aclassaf_1_1exception_htm"><div class="ttname"><a href="classaf_1_1exception.htm">af::exception</a></div><div class="ttdoc">An ArrayFire exception class.</div><div class="ttdef"><b>Definition:</b> <a href="exception_8h_source.htm#l00021">exception.h:22</a></div></div>

<div class="ttc" id="aclassaf_1_1exception_htm_aa884ff67408851f00e50cf971a4dfd05"><div class="ttname"><a href="classaf_1_1exception.htm#aa884ff67408851f00e50cf971a4dfd05">af::exception::what</a></div><div class="ttdeci">virtual const char * what() const</div><div class="ttdoc">Returns an error message for the exception in a string format.</div><div class="ttdef"><b>Definition:</b> <a href="exception_8h_source.htm#l00046">exception.h:46</a></div></div>

<div class="ttc" id="adefines_8h_htm_a023d8ac325fb14f1712a52fb0940b1d5"><div class="ttname"><a href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5">af_dtype</a></div><div class="ttdeci">af_dtype</div><div class="ttdef"><b>Definition:</b> <a href="defines_8h_source.htm#l00210">defines.h:210</a></div></div>

<div class="ttc" id="adefines_8h_htm_a023d8ac325fb14f1712a52fb0940b1d5a82ea90203678bdd0b547068f0a76524b"><div class="ttname"><a href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5a82ea90203678bdd0b547068f0a76524b">f32</a></div><div class="ttdeci">@ f32</div><div class="ttdoc">32-bit floating point values</div><div class="ttdef"><b>Definition:</b> <a href="defines_8h_source.htm#l00211">defines.h:211</a></div></div>

<div class="ttc" id="adefines_8h_htm_a023d8ac325fb14f1712a52fb0940b1d5af4512c88801326ab48816bf6ece20d67"><div class="ttname"><a href="defines_8h.htm#a023d8ac325fb14f1712a52fb0940b1d5af4512c88801326ab48816bf6ece20d67">f16</a></div><div class="ttdeci">@ f16</div><div class="ttdoc">16-bit floating point value</div><div class="ttdef"><b>Definition:</b> <a href="defines_8h_source.htm#l00231">defines.h:228</a></div></div>

<div class="ttc" id="anamespaceaf_htm"><div class="ttname"><a href="namespaceaf.htm">af</a></div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8h_source.htm#l00014">algorithm.h:15</a></div></div>

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