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<div class="title">test_pairs_decoding.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="preprocessor">#include &lt;cstdlib&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#include &lt;gtest/gtest.h&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor">#include &lt;faiss/IndexIVF.h&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#include &lt;faiss/AutoTune.h&gt;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#include &lt;faiss/VectorTransform.h&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#include &lt;faiss/IVFlib.h&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="keyword">namespace </span>{</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a> idx_t;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment"> * Test utils</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment"> *************************************************************/</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="comment">// dimension of the vectors to index</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="keywordtype">int</span> d = 64;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment">// size of the database we plan to index</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="keywordtype">size_t</span> nb = 8000;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="comment">// nb of queries</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="keywordtype">size_t</span> nq = 200;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;std::vector&lt;float&gt; make_data(<span class="keywordtype">size_t</span> n)</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;{</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; std::vector &lt;float&gt; database (n * d);</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n * d; i++) {</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; database[i] = drand48();</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; }</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordflow">return</span> database;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;}</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;std::unique_ptr&lt;faiss::Index&gt; make_index(<span class="keyword">const</span> <span class="keywordtype">char</span> *index_type,</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keyword">const</span> std::vector&lt;float&gt; &amp; x) {</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">auto</span> index = std::unique_ptr&lt;faiss::Index&gt; (</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <a class="code" href="namespacefaiss.html#a0c95ec47726f2ce3fb668dcb1f9a3317">faiss::index_factory</a>(d, index_type));</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; index-&gt;train(nb, x.data());</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; index-&gt;add(nb, x.data());</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordflow">return</span> index;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;}</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="comment"> * Test functions for a given index type</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;<span class="comment"> *************************************************************/</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="keywordtype">bool</span> test_search_centroid(<span class="keyword">const</span> <span class="keywordtype">char</span> *index_key) {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; std::vector&lt;float&gt; xb = make_data(nb); <span class="comment">// database vectors</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">auto</span> index = make_index(index_key, xb);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="comment">/* First test: find the centroids associated to the database</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="comment"> vectors and make sure that each vector does indeed appear in</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;<span class="comment"> the inverted list corresponding to its centroid */</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; std::vector&lt;idx_t&gt; centroid_ids (nb);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; faiss::ivflib::search_centroid(</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; index.get(), xb.data(), nb, centroid_ids.data());</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a> * ivf = faiss::ivflib::extract_index_ivf</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; (index.get());</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; nb; i++) {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordtype">bool</span> found = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordtype">int</span> list_no = centroid_ids[i];</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keywordtype">int</span> list_size = ivf-&gt;invlists-&gt;list_size (list_no);</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keyword">auto</span> * list = ivf-&gt;invlists-&gt;get_ids (list_no);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j = 0; j &lt; list_size; j++) {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keywordflow">if</span> (list[j] == i) {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; found = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; }</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">if</span>(!found) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; }</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;}</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;<span class="keywordtype">int</span> test_search_and_return_centroids(<span class="keyword">const</span> <span class="keywordtype">char</span> *index_key) {</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; std::vector&lt;float&gt; xb = make_data(nb); <span class="comment">// database vectors</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keyword">auto</span> index = make_index(index_key, xb);</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; std::vector&lt;idx_t&gt; centroid_ids (nb);</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; faiss::ivflib::search_centroid(index.get(), xb.data(),</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; nb, centroid_ids.data());</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a> * ivf =</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; faiss::ivflib::extract_index_ivf (index.get());</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; ivf-&gt;<a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a> = 4;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; std::vector&lt;float&gt; xq = make_data(nq); <span class="comment">// database vectors</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordtype">int</span> k = 5;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="comment">// compute a reference search result</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; std::vector&lt;idx_t&gt; refI (nq * k);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; std::vector&lt;float&gt; refD (nq * k);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; index-&gt;search (nq, xq.data(), k, refD.data(), refI.data());</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <span class="comment">// compute search result</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; std::vector&lt;idx_t&gt; newI (nq * k);</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; std::vector&lt;float&gt; newD (nq * k);</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; std::vector&lt;idx_t&gt; query_centroid_ids (nq);</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; std::vector&lt;idx_t&gt; result_centroid_ids (nq * k);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; faiss::ivflib::search_and_return_centroids(index.get(),</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; nq, xq.data(), k,</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; newD.data(), newI.data(),</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; query_centroid_ids.data(),</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; result_centroid_ids.data());</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; <span class="comment">// first verify that we have the same result as the standard search</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordflow">if</span> (newI != refI) {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; }</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; <span class="comment">// then check if the result ids are indeed in the inverted list</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="comment">// they are supposed to be in</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; nq * k; i++) {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; <span class="keywordtype">int</span> list_no = result_centroid_ids[i];</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; <span class="keywordtype">int</span> result_no = newI[i];</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; <span class="keywordflow">if</span> (result_no &lt; 0) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <span class="keywordtype">bool</span> found = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="keywordtype">int</span> list_size = ivf-&gt;invlists-&gt;list_size (list_no);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; <span class="keyword">auto</span> * list = ivf-&gt;invlists-&gt;get_ids (list_no);</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j = 0; j &lt; list_size; j++) {</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; <span class="keywordflow">if</span> (list[j] == result_no) {</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; found = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; }</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; <span class="keywordflow">if</span>(!found) <span class="keywordflow">return</span> 2;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; }</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;}</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;} <span class="comment">// namespace</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160;<span class="comment"> * Test entry points</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160;<span class="comment"> *************************************************************/</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;TEST(test_search_centroid, IVFFlat) {</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="keywordtype">bool</span> ok = test_search_centroid(<span class="stringliteral">&quot;IVF32,Flat&quot;</span>);</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; EXPECT_TRUE(ok);</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160;}</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160;TEST(test_search_centroid, PCAIVFFlat) {</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; <span class="keywordtype">bool</span> ok = test_search_centroid(<span class="stringliteral">&quot;PCA16,IVF32,Flat&quot;</span>);</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; EXPECT_TRUE(ok);</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;}</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;TEST(test_search_and_return_centroids, IVFFlat) {</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; <span class="keywordtype">int</span> err = test_search_and_return_centroids(<span class="stringliteral">&quot;IVF32,Flat&quot;</span>);</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; EXPECT_NE(err, 1);</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; EXPECT_NE(err, 2);</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160;}</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160;TEST(test_search_and_return_centroids, PCAIVFFlat) {</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="keywordtype">int</span> err = test_search_and_return_centroids(<span class="stringliteral">&quot;PCA16,IVF32,Flat&quot;</span>);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; EXPECT_NE(err, 1);</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; EXPECT_NE(err, 2);</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160;}</div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00091">IndexIVF.h:91</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_affed235eadf27a13d753ee4d33a1dc58"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">faiss::IndexIVF::nprobe</a></div><div class="ttdeci">size_t nprobe</div><div class="ttdoc">number of probes at query time </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00098">IndexIVF.h:98</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
<div class="ttc" id="namespacefaiss_html_a0c95ec47726f2ce3fb668dcb1f9a3317"><div class="ttname"><a href="namespacefaiss.html#a0c95ec47726f2ce3fb668dcb1f9a3317">faiss::index_factory</a></div><div class="ttdeci">Index * index_factory(int d, const char *description_in, MetricType metric)</div><div class="ttdef"><b>Definition:</b> <a href="AutoTune_8cpp_source.html#l00722">AutoTune.cpp:722</a></div></div>
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