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| <a href="include_2mxnet_2kvstore_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * distributed with this work for additional information</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * "License"); you may not use this file except in compliance</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * with the License. You may obtain a copy of the License at</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> *</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * software distributed under the License is distributed on an</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * KIND, either express or implied. See the License for the</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * specific language governing permissions and limitations</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * under the License.</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> */</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#ifndef MXNET_KVSTORE_H_</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#define MXNET_KVSTORE_H_</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <dmlc/io.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <unordered_map></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <functional></span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <atomic></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "../../src/kvstore/gradient_compression.h"</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include "<a class="code" href="include_2mxnet_2ndarray_8h.html">./ndarray.h</a>"</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#if MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include "ps/ps.h"</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#endif // MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">namespace </span><a class="code" href="namespacemxnet.html">mxnet</a> {</div><div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html"> 47</a></span> <span class="keyword">class </span><a class="code" href="classmxnet_1_1KVStore.html">KVStore</a> {</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a02e23071eb46464b58f2e2bf5654d6d6"> 50</a></span> <span class="keyword">virtual</span> <a class="code" href="classmxnet_1_1KVStore.html#a02e23071eb46464b58f2e2bf5654d6d6">~KVStore</a>() {}</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">static</span> <a class="code" href="classmxnet_1_1KVStore.html">KVStore</a> *<a class="code" href="classmxnet_1_1KVStore.html#a6d54b075d3b43577f8339b25000a0c82">Create</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="classmxnet_1_1KVStore.html#a722b2150dbf50d528fce62307809f949">type</a> = <span class="stringliteral">"local"</span>);</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a722b2150dbf50d528fce62307809f949"> 67</a></span> <span class="keyword">inline</span> <span class="keyword">const</span> std::string& <a class="code" href="classmxnet_1_1KVStore.html#a722b2150dbf50d528fce62307809f949">type</a>() { <span class="keywordflow">return</span> <a class="code" href="classmxnet_1_1KVStore.html#ad1023ca677c6e87ccc7d92c4df48bd40">type_</a>; }</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#ac646c6d489a1c47b84556e90b2176f49">SetGradientCompression</a>(<span class="keyword">const</span> std::vector<std::pair<std::string, std::string> ></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> & kwargs) = 0;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#af4e56c1f2b90bdd02e2c4e7d2abf6265">Init</a>(<span class="keyword">const</span> std::vector<int>& keys,</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="keyword">const</span> std::vector<NDArray>& values) = 0;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#af4e56c1f2b90bdd02e2c4e7d2abf6265">Init</a>(<span class="keyword">const</span> std::vector<std::string>& str_keys,</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="keyword">const</span> std::vector<NDArray>& values) = 0;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a56a3b6d687700f7c71310cd47ab5a54c">Push</a>(<span class="keyword">const</span> std::vector<int>& keys,</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keyword">const</span> std::vector<NDArray>& values,</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="keywordtype">int</span> priority = 0) = 0;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a56a3b6d687700f7c71310cd47ab5a54c">Push</a>(<span class="keyword">const</span> std::vector<std::string>& str_keys,</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="keyword">const</span> std::vector<NDArray>& values,</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="keywordtype">int</span> priority = 0) = 0;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a98e041793c133337cecc441e441ed721">Pull</a>(<span class="keyword">const</span> std::vector<int>& keys,</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">const</span> std::vector<NDArray*>& values,</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="keywordtype">int</span> priority = 0) = 0;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a98e041793c133337cecc441e441ed721">Pull</a>(<span class="keyword">const</span> std::vector<std::string>& str_keys,</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="keyword">const</span> std::vector<NDArray*>& values,</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="keywordtype">int</span> priority = 0) = 0;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#ade6175a35ee3c660b7d254953d1a0070">PullRowSparse</a>(<span class="keyword">const</span> std::vector<int>& str_keys,</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="keyword">const</span> std::vector<std::pair<NDArray*, NDArray>>& val_rowids,</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="keywordtype">int</span> priority = 0) = 0;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#ade6175a35ee3c660b7d254953d1a0070">PullRowSparse</a>(<span class="keyword">const</span> std::vector<std::string>& str_keys,</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="keyword">const</span> std::vector<std::pair<NDArray*, NDArray>>& val_rowids,</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="keywordtype">int</span> priority = 0) = 0;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a6e4a76bd57f185349c58a5a658c32a64"> 214</a></span> <span class="keyword">typedef</span> std::function<void(int, const NDArray&, NDArray*)> <a class="code" href="classmxnet_1_1KVStore.html#a6e4a76bd57f185349c58a5a658c32a64">Updater</a>;</div><div class="line"><a name="l00218"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#abe6963a386cc6dc579029349a447d1cb"> 218</a></span> <span class="keyword">typedef</span> std::function<void(const std::string&, const NDArray&, NDArray*)> <a class="code" href="classmxnet_1_1KVStore.html#abe6963a386cc6dc579029349a447d1cb">StrUpdater</a>;</div><div class="line"><a name="l00228"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a352ef7eae04211eca1ed47401a6d15d5"> 228</a></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a352ef7eae04211eca1ed47401a6d15d5">set_updater</a>(<span class="keyword">const</span> Updater& updater) {</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> CHECK(updater) << <span class="stringliteral">"invalid updater"</span>;</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <a class="code" href="classmxnet_1_1KVStore.html#a01befb768a81a8e7a366708240ee6d06">updater_</a> = updater;</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> }</div><div class="line"><a name="l00241"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a777f1de6348bba9ef62b56064a6e0c46"> 241</a></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a777f1de6348bba9ef62b56064a6e0c46">set_updater</a>(<span class="keyword">const</span> StrUpdater& updater) {</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> CHECK(updater) << <span class="stringliteral">"invalid updater"</span>;</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <a class="code" href="classmxnet_1_1KVStore.html#abf0f494ba57dd7b035ece0d96eb5575f">str_updater_</a> = updater;</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> }</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment">/******************************************************</span></div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"> * the following are used for multi-machines.</span></div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"> ******************************************************/</span></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00254"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a5d919a7a4c9495e9a569c8d733d6325f"> 254</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a5d919a7a4c9495e9a569c8d733d6325f">InitPSEnv</a>(<span class="keyword">const</span> std::unordered_map<std::string, std::string>& envs) {</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="preprocessor">#if MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> ps::Environment::Init(envs);</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> LOG(FATAL) << <span class="stringliteral">"compile with USE_DIST_KVSTORE=1 to init parameter server's environment"</span>;</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="preprocessor">#endif // MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> }</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div><div class="line"><a name="l00267"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#ab216fb292fa77e843e95f474fa671a20"> 267</a></span> <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="classmxnet_1_1KVStore.html#ab216fb292fa77e843e95f474fa671a20">IsWorkerNode</a>() {</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="preprocessor">#if MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* role_str = ps::Environment::Get()->find(<span class="stringliteral">"DMLC_ROLE"</span>);</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="keywordflow">return</span> (role_str == <span class="keyword">nullptr</span>) || (!strcmp(role_str, <span class="stringliteral">"worker"</span>));</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="preprocessor">#endif // MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> }</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00281"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a101178924ce1d635b0c8c2a5bce0ceaf"> 281</a></span> <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="classmxnet_1_1KVStore.html#a101178924ce1d635b0c8c2a5bce0ceaf">IsServerNode</a>() {</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor">#if MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* role_str = ps::Environment::Get()->find(<span class="stringliteral">"DMLC_ROLE"</span>);</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="keywordflow">return</span> (role_str != <span class="keyword">nullptr</span>) && (!strcmp(role_str, <span class="stringliteral">"server"</span>));</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="preprocessor">#endif // MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> }</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#afa87753d90fc7e75234229834ea23abb"> 290</a></span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#afa87753d90fc7e75234229834ea23abb">set_barrier_before_exit</a>(<span class="keyword">const</span> <span class="keywordtype">bool</span> barrier_before_exit) {</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="preprocessor">#if MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="keywordflow">if</span> (!<a class="code" href="classmxnet_1_1KVStore.html#ab216fb292fa77e843e95f474fa671a20">IsWorkerNode</a>()) LOG(FATAL) << <span class="stringliteral">"barrier_before_exit takes effect only on worker nodes"</span>;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <a class="code" href="classmxnet_1_1KVStore.html#aa8ba7abf8334326cab19eb568cb31cfa">barrier_before_exit_</a> = barrier_before_exit;</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> LOG(FATAL) << <span class="stringliteral">"compile with USE_DIST_KVSTORE=1 to enable barrier"</span>;</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> }</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span> </div><div class="line"><a name="l00304"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a41113b9dfeab6c705ba064cc3f010fb4"> 304</a></span> <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="classmxnet_1_1KVStore.html#a41113b9dfeab6c705ba064cc3f010fb4">IsSchedulerNode</a>() {</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="preprocessor">#if MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* role_str = ps::Environment::Get()->find(<span class="stringliteral">"DMLC_ROLE"</span>);</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="keywordflow">return</span> (role_str != <span class="keyword">nullptr</span>) && (!strcmp(role_str, <span class="stringliteral">"scheduler"</span>));</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="preprocessor">#endif // MXNET_USE_DIST_KVSTORE</span></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span> }</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span> </div><div class="line"><a name="l00319"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a262ef45340106fdb5c2a296c3cb711b1"> 319</a></span> <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classmxnet_1_1KVStore.html#a262ef45340106fdb5c2a296c3cb711b1">get_rank</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span> }</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div><div class="line"><a name="l00326"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a1fd19b2a123b6069b35e1e8b7fad9dc3"> 326</a></span> <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classmxnet_1_1KVStore.html#a1fd19b2a123b6069b35e1e8b7fad9dc3">get_group_size</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span> }</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div><div class="line"><a name="l00338"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#af5c48df3aade761a547a1dc6f7b8702d"> 338</a></span> <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classmxnet_1_1KVStore.html#af5c48df3aade761a547a1dc6f7b8702d">get_num_dead_node</a>(<span class="keywordtype">int</span> node_id, <span class="keywordtype">int</span> timeout = 60)<span class="keyword"> const </span>{</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span> }</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> </div><div class="line"><a name="l00349"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a4f9275fb7a11589fae1dcc5a8a3354ac"> 349</a></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a4f9275fb7a11589fae1dcc5a8a3354ac">Barrier</a>() { }</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div><div class="line"><a name="l00362"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a4ff4ca05f3c519ebbc2e46264e8b63dd"> 362</a></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#a4ff4ca05f3c519ebbc2e46264e8b63dd">SendCommandToServers</a>(<span class="keywordtype">int</span> cmd_id, <span class="keyword">const</span> std::string& cmd_body) { }</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div><div class="line"><a name="l00367"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a50db5cb1a140fb84c8e31def54270ae3"> 367</a></span> <span class="keyword">typedef</span> std::function<void(int, const std::string&)> <a class="code" href="classmxnet_1_1KVStore.html#a50db5cb1a140fb84c8e31def54270ae3">Controller</a>;</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span> </div><div class="line"><a name="l00382"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#ae137ab8b5407060529c18a8084946d0b"> 382</a></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1KVStore.html#ae137ab8b5407060529c18a8084946d0b">RunServer</a>(<span class="keyword">const</span> Controller& controller) { }</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00388"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a01befb768a81a8e7a366708240ee6d06"> 388</a></span> Updater <a class="code" href="classmxnet_1_1KVStore.html#a01befb768a81a8e7a366708240ee6d06">updater_</a>;</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> </div><div class="line"><a name="l00393"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#abf0f494ba57dd7b035ece0d96eb5575f"> 393</a></span> StrUpdater <a class="code" href="classmxnet_1_1KVStore.html#abf0f494ba57dd7b035ece0d96eb5575f">str_updater_</a>;</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> </div><div class="line"><a name="l00398"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#ad1023ca677c6e87ccc7d92c4df48bd40"> 398</a></span> std::string <a class="code" href="classmxnet_1_1KVStore.html#ad1023ca677c6e87ccc7d92c4df48bd40">type_</a>;</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> </div><div class="line"><a name="l00404"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#a4131e7db30b5e7be34997abcf75741a6"> 404</a></span> std::shared_ptr<kvstore::GradientCompression> <a class="code" href="classmxnet_1_1KVStore.html#a4131e7db30b5e7be34997abcf75741a6">gradient_compression_</a>;</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span> </div><div class="line"><a name="l00409"></a><span class="lineno"><a class="line" href="classmxnet_1_1KVStore.html#aa8ba7abf8334326cab19eb568cb31cfa"> 409</a></span> std::atomic<bool> <a class="code" href="classmxnet_1_1KVStore.html#aa8ba7abf8334326cab19eb568cb31cfa">barrier_before_exit_</a>{<span class="keyword">true</span>};</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> };</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> } <span class="comment">// namespace mxnet</span></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="preprocessor">#endif // MXNET_KVSTORE_H_</span></div><div class="ttc" id="classmxnet_1_1KVStore_html"><div class="ttname"><a href="classmxnet_1_1KVStore.html">mxnet::KVStore</a></div><div class="ttdoc">distributed key-value store </div><div class="ttdef"><b>Definition:</b> kvstore.h:47</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a6e4a76bd57f185349c58a5a658c32a64"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a6e4a76bd57f185349c58a5a658c32a64">mxnet::KVStore::Updater</a></div><div class="ttdeci">std::function< void(int, const NDArray &, NDArray *)> Updater</div><div class="ttdoc">the prototype of user-defined updater </div><div class="ttdef"><b>Definition:</b> kvstore.h:214</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_ac646c6d489a1c47b84556e90b2176f49"><div class="ttname"><a href="classmxnet_1_1KVStore.html#ac646c6d489a1c47b84556e90b2176f49">mxnet::KVStore::SetGradientCompression</a></div><div class="ttdeci">virtual void SetGradientCompression(const std::vector< std::pair< std::string, std::string > > &kwargs)=0</div><div class="ttdoc">Set parameters to use low-bit compressed gradients. </div></div> |
| <div class="ttc" id="namespacemxnet_html"><div class="ttname"><a href="namespacemxnet.html">mxnet</a></div><div class="ttdoc">namespace of mxnet </div><div class="ttdef"><b>Definition:</b> base.h:118</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a262ef45340106fdb5c2a296c3cb711b1"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a262ef45340106fdb5c2a296c3cb711b1">mxnet::KVStore::get_rank</a></div><div class="ttdeci">virtual int get_rank() const </div><div class="ttdef"><b>Definition:</b> kvstore.h:319</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a6d54b075d3b43577f8339b25000a0c82"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a6d54b075d3b43577f8339b25000a0c82">mxnet::KVStore::Create</a></div><div class="ttdeci">static KVStore * Create(const char *type="local")</div><div class="ttdoc">Factory function to create a new KVStore. </div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a777f1de6348bba9ef62b56064a6e0c46"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a777f1de6348bba9ef62b56064a6e0c46">mxnet::KVStore::set_updater</a></div><div class="ttdeci">virtual void set_updater(const StrUpdater &updater)</div><div class="ttdoc">set an updater with string keys </div><div class="ttdef"><b>Definition:</b> kvstore.h:241</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a01befb768a81a8e7a366708240ee6d06"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a01befb768a81a8e7a366708240ee6d06">mxnet::KVStore::updater_</a></div><div class="ttdeci">Updater updater_</div><div class="ttdoc">the user-defined updater </div><div class="ttdef"><b>Definition:</b> kvstore.h:388</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_ade6175a35ee3c660b7d254953d1a0070"><div class="ttname"><a href="classmxnet_1_1KVStore.html#ade6175a35ee3c660b7d254953d1a0070">mxnet::KVStore::PullRowSparse</a></div><div class="ttdeci">virtual void PullRowSparse(const std::vector< int > &str_keys, const std::vector< std::pair< NDArray *, NDArray >> &val_rowids, int priority=0)=0</div><div class="ttdoc">pull a list of key-value pairs from the store. The NDArray pulled back will be in row_sparse storage ...</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a722b2150dbf50d528fce62307809f949"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a722b2150dbf50d528fce62307809f949">mxnet::KVStore::type</a></div><div class="ttdeci">const std::string & type()</div><div class="ttdoc">return the type </div><div class="ttdef"><b>Definition:</b> kvstore.h:67</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a98e041793c133337cecc441e441ed721"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a98e041793c133337cecc441e441ed721">mxnet::KVStore::Pull</a></div><div class="ttdeci">virtual void Pull(const std::vector< int > &keys, const std::vector< NDArray * > &values, int priority=0)=0</div><div class="ttdoc">pull a list of key-value pairs from the store </div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a41113b9dfeab6c705ba064cc3f010fb4"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a41113b9dfeab6c705ba064cc3f010fb4">mxnet::KVStore::IsSchedulerNode</a></div><div class="ttdeci">static bool IsSchedulerNode()</div><div class="ttdef"><b>Definition:</b> kvstore.h:304</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a4f9275fb7a11589fae1dcc5a8a3354ac"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a4f9275fb7a11589fae1dcc5a8a3354ac">mxnet::KVStore::Barrier</a></div><div class="ttdeci">virtual void Barrier()</div><div class="ttdoc">global barrier among all worker machines </div><div class="ttdef"><b>Definition:</b> kvstore.h:349</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a5d919a7a4c9495e9a569c8d733d6325f"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a5d919a7a4c9495e9a569c8d733d6325f">mxnet::KVStore::InitPSEnv</a></div><div class="ttdeci">static void InitPSEnv(const std::unordered_map< std::string, std::string > &envs)</div><div class="ttdoc">initalize ps-lite environment variables </div><div class="ttdef"><b>Definition:</b> kvstore.h:254</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_af4e56c1f2b90bdd02e2c4e7d2abf6265"><div class="ttname"><a href="classmxnet_1_1KVStore.html#af4e56c1f2b90bdd02e2c4e7d2abf6265">mxnet::KVStore::Init</a></div><div class="ttdeci">virtual void Init(const std::vector< int > &keys, const std::vector< NDArray > &values)=0</div><div class="ttdoc">Initialize a list of key-value pair to the store. </div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_ab216fb292fa77e843e95f474fa671a20"><div class="ttname"><a href="classmxnet_1_1KVStore.html#ab216fb292fa77e843e95f474fa671a20">mxnet::KVStore::IsWorkerNode</a></div><div class="ttdeci">static bool IsWorkerNode()</div><div class="ttdef"><b>Definition:</b> kvstore.h:267</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a02e23071eb46464b58f2e2bf5654d6d6"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a02e23071eb46464b58f2e2bf5654d6d6">mxnet::KVStore::~KVStore</a></div><div class="ttdeci">virtual ~KVStore()</div><div class="ttdoc">virtual destructor </div><div class="ttdef"><b>Definition:</b> kvstore.h:50</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_afa87753d90fc7e75234229834ea23abb"><div class="ttname"><a href="classmxnet_1_1KVStore.html#afa87753d90fc7e75234229834ea23abb">mxnet::KVStore::set_barrier_before_exit</a></div><div class="ttdeci">void set_barrier_before_exit(const bool barrier_before_exit)</div><div class="ttdef"><b>Definition:</b> kvstore.h:290</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_abf0f494ba57dd7b035ece0d96eb5575f"><div class="ttname"><a href="classmxnet_1_1KVStore.html#abf0f494ba57dd7b035ece0d96eb5575f">mxnet::KVStore::str_updater_</a></div><div class="ttdeci">StrUpdater str_updater_</div><div class="ttdoc">the user-defined updater with string keys </div><div class="ttdef"><b>Definition:</b> kvstore.h:393</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_af5c48df3aade761a547a1dc6f7b8702d"><div class="ttname"><a href="classmxnet_1_1KVStore.html#af5c48df3aade761a547a1dc6f7b8702d">mxnet::KVStore::get_num_dead_node</a></div><div class="ttdeci">virtual int get_num_dead_node(int node_id, int timeout=60) const </div><div class="ttdef"><b>Definition:</b> kvstore.h:338</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a4131e7db30b5e7be34997abcf75741a6"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a4131e7db30b5e7be34997abcf75741a6">mxnet::KVStore::gradient_compression_</a></div><div class="ttdeci">std::shared_ptr< kvstore::GradientCompression > gradient_compression_</div><div class="ttdoc">Gradient compression object starts with GC_NONE mode Used if SetGradientCompression sets the type...</div><div class="ttdef"><b>Definition:</b> kvstore.h:404</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_ae137ab8b5407060529c18a8084946d0b"><div class="ttname"><a href="classmxnet_1_1KVStore.html#ae137ab8b5407060529c18a8084946d0b">mxnet::KVStore::RunServer</a></div><div class="ttdeci">virtual void RunServer(const Controller &controller)</div><div class="ttdoc">Run as server (or scheduler) </div><div class="ttdef"><b>Definition:</b> kvstore.h:382</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_abe6963a386cc6dc579029349a447d1cb"><div class="ttname"><a href="classmxnet_1_1KVStore.html#abe6963a386cc6dc579029349a447d1cb">mxnet::KVStore::StrUpdater</a></div><div class="ttdeci">std::function< void(const std::string &, const NDArray &, NDArray *)> StrUpdater</div><div class="ttdoc">the prototype of user-defined updater with string keys </div><div class="ttdef"><b>Definition:</b> kvstore.h:218</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a56a3b6d687700f7c71310cd47ab5a54c"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a56a3b6d687700f7c71310cd47ab5a54c">mxnet::KVStore::Push</a></div><div class="ttdeci">virtual void Push(const std::vector< int > &keys, const std::vector< NDArray > &values, int priority=0)=0</div><div class="ttdoc">push a list of key-value pairs into the store </div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a4ff4ca05f3c519ebbc2e46264e8b63dd"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a4ff4ca05f3c519ebbc2e46264e8b63dd">mxnet::KVStore::SendCommandToServers</a></div><div class="ttdeci">virtual void SendCommandToServers(int cmd_id, const std::string &cmd_body)</div><div class="ttdoc">Send a command to all server nodes. </div><div class="ttdef"><b>Definition:</b> kvstore.h:362</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_ad1023ca677c6e87ccc7d92c4df48bd40"><div class="ttname"><a href="classmxnet_1_1KVStore.html#ad1023ca677c6e87ccc7d92c4df48bd40">mxnet::KVStore::type_</a></div><div class="ttdeci">std::string type_</div><div class="ttdoc">the kvstore type </div><div class="ttdef"><b>Definition:</b> kvstore.h:398</div></div> |
| <div class="ttc" id="include_2mxnet_2ndarray_8h_html"><div class="ttname"><a href="include_2mxnet_2ndarray_8h.html">ndarray.h</a></div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a50db5cb1a140fb84c8e31def54270ae3"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a50db5cb1a140fb84c8e31def54270ae3">mxnet::KVStore::Controller</a></div><div class="ttdeci">std::function< void(int, const std::string &)> Controller</div><div class="ttdoc">the prototype of a server controller </div><div class="ttdef"><b>Definition:</b> kvstore.h:367</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a352ef7eae04211eca1ed47401a6d15d5"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a352ef7eae04211eca1ed47401a6d15d5">mxnet::KVStore::set_updater</a></div><div class="ttdeci">virtual void set_updater(const Updater &updater)</div><div class="ttdoc">set an updater </div><div class="ttdef"><b>Definition:</b> kvstore.h:228</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a1fd19b2a123b6069b35e1e8b7fad9dc3"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a1fd19b2a123b6069b35e1e8b7fad9dc3">mxnet::KVStore::get_group_size</a></div><div class="ttdeci">virtual int get_group_size() const </div><div class="ttdef"><b>Definition:</b> kvstore.h:326</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_aa8ba7abf8334326cab19eb568cb31cfa"><div class="ttname"><a href="classmxnet_1_1KVStore.html#aa8ba7abf8334326cab19eb568cb31cfa">mxnet::KVStore::barrier_before_exit_</a></div><div class="ttdeci">std::atomic< bool > barrier_before_exit_</div><div class="ttdoc">whether to do barrier when finalize </div><div class="ttdef"><b>Definition:</b> kvstore.h:409</div></div> |
| <div class="ttc" id="classmxnet_1_1KVStore_html_a101178924ce1d635b0c8c2a5bce0ceaf"><div class="ttname"><a href="classmxnet_1_1KVStore.html#a101178924ce1d635b0c8c2a5bce0ceaf">mxnet::KVStore::IsServerNode</a></div><div class="ttdeci">static bool IsServerNode()</div><div class="ttdef"><b>Definition:</b> kvstore.h:281</div></div> |
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