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| <h1>Source code for mxnet.module.bucketing_module</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="c1"># or more contributor license agreements. See the NOTICE file</span> |
| <span class="c1"># distributed with this work for additional information</span> |
| <span class="c1"># regarding copyright ownership. The ASF licenses this file</span> |
| <span class="c1"># to you under the Apache License, Version 2.0 (the</span> |
| <span class="c1"># "License"); you may not use this file except in compliance</span> |
| <span class="c1"># with the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing,</span> |
| <span class="c1"># software distributed under the License is distributed on an</span> |
| <span class="c1"># "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span> |
| <span class="c1"># KIND, either express or implied. See the License for the</span> |
| <span class="c1"># specific language governing permissions and limitations</span> |
| <span class="c1"># under the License.</span> |
| |
| <span class="c1"># pylint: disable=too-many-instance-attributes, too-many-arguments, protected-access</span> |
| <span class="c1"># pylint: disable=too-many-public-methods</span> |
| <span class="sd">"""A `BucketingModule` implement the `BaseModule` API, and allows multiple</span> |
| <span class="sd">symbols to be used depending on the `bucket_key` provided by each different</span> |
| <span class="sd">mini-batch of data.</span> |
| <span class="sd">"""</span> |
| |
| <span class="kn">import</span> <span class="nn">logging</span> |
| <span class="kn">import</span> <span class="nn">warnings</span> |
| |
| <span class="kn">from</span> <span class="nn">..</span> <span class="kn">import</span> <span class="n">context</span> <span class="k">as</span> <span class="n">ctx</span> |
| |
| <span class="kn">from</span> <span class="nn">..initializer</span> <span class="kn">import</span> <span class="n">Uniform</span> |
| |
| <span class="kn">from</span> <span class="nn">.base_module</span> <span class="kn">import</span> <span class="n">BaseModule</span><span class="p">,</span> <span class="n">_check_input_names</span> |
| <span class="kn">from</span> <span class="nn">.module</span> <span class="kn">import</span> <span class="n">Module</span> |
| |
| <div class="viewcode-block" id="BucketingModule"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule">[docs]</a><span class="k">class</span> <span class="nc">BucketingModule</span><span class="p">(</span><span class="n">BaseModule</span><span class="p">):</span> |
| <span class="sd">"""This module helps to deal efficiently with varying-length inputs.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> sym_gen : function</span> |
| <span class="sd"> A function when called with a bucket key, returns a triple</span> |
| <span class="sd"> ``(symbol, data_names, label_names)``.</span> |
| <span class="sd"> default_bucket_key : str (or any python object)</span> |
| <span class="sd"> The key for the default bucket.</span> |
| <span class="sd"> logger : Logger</span> |
| <span class="sd"> context : Context or list of Context</span> |
| <span class="sd"> Defaults to ``mx.cpu()``</span> |
| <span class="sd"> work_load_list : list of number</span> |
| <span class="sd"> Defaults to ``None``, indicating uniform workload.</span> |
| <span class="sd"> fixed_param_names: list of str</span> |
| <span class="sd"> Defaults to ``None``, indicating no network parameters are fixed.</span> |
| <span class="sd"> state_names : list of str</span> |
| <span class="sd"> States are similar to data and label, but not provided by data iterator.</span> |
| <span class="sd"> Instead they are initialized to 0 and can be set by set_states()</span> |
| <span class="sd"> group2ctxs : dict of str to context or list of context,</span> |
| <span class="sd"> or list of dict of str to context</span> |
| <span class="sd"> Default is `None`. Mapping the `ctx_group` attribute to the context assignment.</span> |
| <span class="sd"> compression_params : dict</span> |
| <span class="sd"> Specifies type of gradient compression and additional arguments depending</span> |
| <span class="sd"> on the type of compression being used. For example, 2bit compression requires a threshold.</span> |
| <span class="sd"> Arguments would then be {'type':'2bit', 'threshold':0.5}</span> |
| <span class="sd"> See mxnet.KVStore.set_gradient_compression method for more details on gradient compression.</span> |
| <span class="sd"> """</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">sym_gen</span><span class="p">,</span> <span class="n">default_bucket_key</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">logger</span><span class="o">=</span><span class="n">logging</span><span class="p">,</span> |
| <span class="n">context</span><span class="o">=</span><span class="n">ctx</span><span class="o">.</span><span class="n">cpu</span><span class="p">(),</span> <span class="n">work_load_list</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> |
| <span class="n">fixed_param_names</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">state_names</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">group2ctxs</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> |
| <span class="n">compression_params</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span> |
| <span class="nb">super</span><span class="p">(</span><span class="n">BucketingModule</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">logger</span><span class="o">=</span><span class="n">logger</span><span class="p">)</span> |
| |
| <span class="k">assert</span> <span class="n">default_bucket_key</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_default_bucket_key</span> <span class="o">=</span> <span class="n">default_bucket_key</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_sym_gen</span> <span class="o">=</span> <span class="n">sym_gen</span> |
| |
| <span class="n">symbol</span><span class="p">,</span> <span class="n">data_names</span><span class="p">,</span> <span class="n">label_names</span> <span class="o">=</span> <span class="n">sym_gen</span><span class="p">(</span><span class="n">default_bucket_key</span><span class="p">)</span> |
| <span class="n">data_names</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">data_names</span><span class="p">)</span> <span class="k">if</span> <span class="n">data_names</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="k">else</span> <span class="p">[]</span> |
| <span class="n">label_names</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">label_names</span><span class="p">)</span> <span class="k">if</span> <span class="n">label_names</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="k">else</span> <span class="p">[]</span> |
| <span class="n">state_names</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">state_names</span><span class="p">)</span> <span class="k">if</span> <span class="n">state_names</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="k">else</span> <span class="p">[]</span> |
| <span class="n">fixed_param_names</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">fixed_param_names</span><span class="p">)</span> <span class="k">if</span> <span class="n">fixed_param_names</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="k">else</span> <span class="p">[]</span> |
| |
| <span class="n">_check_input_names</span><span class="p">(</span><span class="n">symbol</span><span class="p">,</span> <span class="n">data_names</span><span class="p">,</span> <span class="s2">"data"</span><span class="p">,</span> <span class="bp">True</span><span class="p">)</span> |
| <span class="n">_check_input_names</span><span class="p">(</span><span class="n">symbol</span><span class="p">,</span> <span class="n">label_names</span><span class="p">,</span> <span class="s2">"label"</span><span class="p">,</span> <span class="bp">False</span><span class="p">)</span> |
| <span class="n">_check_input_names</span><span class="p">(</span><span class="n">symbol</span><span class="p">,</span> <span class="n">state_names</span><span class="p">,</span> <span class="s2">"state"</span><span class="p">,</span> <span class="bp">True</span><span class="p">)</span> |
| <span class="n">_check_input_names</span><span class="p">(</span><span class="n">symbol</span><span class="p">,</span> <span class="n">fixed_param_names</span><span class="p">,</span> <span class="s2">"fixed_param"</span><span class="p">,</span> <span class="bp">True</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_compression_params</span> <span class="o">=</span> <span class="n">compression_params</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_fixed_param_names</span> <span class="o">=</span> <span class="n">fixed_param_names</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_state_names</span> <span class="o">=</span> <span class="n">state_names</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_context</span> <span class="o">=</span> <span class="n">context</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_work_load_list</span> <span class="o">=</span> <span class="n">work_load_list</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_group2ctxs</span> <span class="o">=</span> <span class="n">group2ctxs</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span> <span class="o">=</span> <span class="bp">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_bucket_key</span> <span class="o">=</span> <span class="bp">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_params_dirty</span> <span class="o">=</span> <span class="bp">False</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_monitor</span> <span class="o">=</span> <span class="bp">None</span> |
| |
| <span class="k">def</span> <span class="nf">_reset_bind</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Internal utility function to reset binding."""</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="o">=</span> <span class="bp">False</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span> <span class="o">=</span> <span class="bp">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_bucket_key</span> <span class="o">=</span> <span class="bp">None</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">data_names</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A list of names for data required by this module."""</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">data_names</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">_</span><span class="p">,</span> <span class="n">data_names</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_sym_gen</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_default_bucket_key</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">data_names</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">output_names</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A list of names for the outputs of this module."""</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">output_names</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">symbol</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_sym_gen</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_default_bucket_key</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">symbol</span><span class="o">.</span><span class="n">list_outputs</span><span class="p">()</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">data_shapes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Get data shapes.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> A list of `(name, shape)` pairs.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">data_shapes</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">label_shapes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Get label shapes.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> A list of `(name, shape)` pairs.</span> |
| <span class="sd"> The return value could be ``None`` if the module does not need labels,</span> |
| <span class="sd"> or if the module is not bound for training (in this case, label information</span> |
| <span class="sd"> is not available).</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">label_shapes</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">output_shapes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Gets output shapes.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> A list of `(name, shape)` pairs.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">output_shapes</span> |
| |
| <div class="viewcode-block" id="BucketingModule.get_params"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.get_params">[docs]</a> <span class="k">def</span> <span class="nf">get_params</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Gets current parameters.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> `(arg_params, aux_params)`</span> |
| <span class="sd"> A pair of dictionaries each mapping parameter names to NDArray values.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">_params_dirty</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_params_dirty</span> |
| <span class="n">params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">get_params</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_params_dirty</span> <span class="o">=</span> <span class="bp">False</span> |
| <span class="k">return</span> <span class="n">params</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.set_params"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.set_params">[docs]</a> <span class="k">def</span> <span class="nf">set_params</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">arg_params</span><span class="p">,</span> <span class="n">aux_params</span><span class="p">,</span> <span class="n">allow_missing</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">force_init</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> |
| <span class="n">allow_extra</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span> |
| <span class="sd">"""Assigns parameters and aux state values.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> arg_params : dict</span> |
| <span class="sd"> Dictionary of name to value (`NDArray`) mapping.</span> |
| <span class="sd"> aux_params : dict</span> |
| <span class="sd"> Dictionary of name to value (`NDArray`) mapping.</span> |
| <span class="sd"> allow_missing : bool</span> |
| <span class="sd"> If true, params could contain missing values, and the initializer will be</span> |
| <span class="sd"> called to fill those missing params.</span> |
| <span class="sd"> force_init : bool</span> |
| <span class="sd"> If true, will force re-initialize even if already initialized.</span> |
| <span class="sd"> allow_extra : boolean, optional</span> |
| <span class="sd"> Whether allow extra parameters that are not needed by symbol.</span> |
| <span class="sd"> If this is True, no error will be thrown when arg_params or aux_params</span> |
| <span class="sd"> contain extra parameters that is not needed by the executor.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> # An example of setting module parameters.</span> |
| <span class="sd"> >>> sym, arg_params, aux_params = mx.model.load_checkpoint(model_prefix, n_epoch_load)</span> |
| <span class="sd"> >>> mod.set_params(arg_params=arg_params, aux_params=aux_params)</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">allow_missing</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">init_params</span><span class="p">(</span><span class="n">initializer</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">arg_params</span><span class="o">=</span><span class="n">arg_params</span><span class="p">,</span> <span class="n">aux_params</span><span class="o">=</span><span class="n">aux_params</span><span class="p">,</span> |
| <span class="n">allow_missing</span><span class="o">=</span><span class="n">allow_missing</span><span class="p">,</span> <span class="n">force_init</span><span class="o">=</span><span class="n">force_init</span><span class="p">)</span> |
| <span class="k">return</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">force_init</span><span class="p">:</span> |
| <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s2">"Parameters already initialized and force_init=False. "</span> |
| <span class="s2">"set_params call ignored."</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span> |
| <span class="k">return</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">set_params</span><span class="p">(</span><span class="n">arg_params</span><span class="p">,</span> <span class="n">aux_params</span><span class="p">,</span> <span class="n">allow_missing</span><span class="o">=</span><span class="n">allow_missing</span><span class="p">,</span> |
| <span class="n">force_init</span><span class="o">=</span><span class="n">force_init</span><span class="p">,</span> <span class="n">allow_extra</span><span class="o">=</span><span class="n">allow_extra</span><span class="p">)</span> |
| |
| <span class="c1"># because we didn't update self._arg_params, they are dirty now.</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_params_dirty</span> <span class="o">=</span> <span class="bp">True</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> <span class="o">=</span> <span class="bp">True</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.init_params"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.init_params">[docs]</a> <span class="k">def</span> <span class="nf">init_params</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">initializer</span><span class="o">=</span><span class="n">Uniform</span><span class="p">(</span><span class="mf">0.01</span><span class="p">),</span> <span class="n">arg_params</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">aux_params</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> |
| <span class="n">allow_missing</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">force_init</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">allow_extra</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span> |
| <span class="sd">"""Initializes parameters.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> initializer : Initializer</span> |
| <span class="sd"> arg_params : dict</span> |
| <span class="sd"> Defaults to ``None``. Existing parameters. This has higher priority</span> |
| <span class="sd"> than `initializer`.</span> |
| <span class="sd"> aux_params : dict</span> |
| <span class="sd"> Defaults to ``None``. Existing auxiliary states. This has higher priority</span> |
| <span class="sd"> than `initializer`.</span> |
| <span class="sd"> allow_missing : bool</span> |
| <span class="sd"> Allow missing values in `arg_params` and `aux_params` (if not ``None``).</span> |
| <span class="sd"> In this case, missing values will be filled with `initializer`.</span> |
| <span class="sd"> force_init : bool</span> |
| <span class="sd"> Defaults to ``False``.</span> |
| <span class="sd"> allow_extra : boolean, optional</span> |
| <span class="sd"> Whether allow extra parameters that are not needed by symbol.</span> |
| <span class="sd"> If this is True, no error will be thrown when arg_params or aux_params</span> |
| <span class="sd"> contain extra parameters that is not needed by the executor.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">force_init</span><span class="p">:</span> |
| <span class="k">return</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span><span class="p">,</span> <span class="s1">'call bind before initializing the parameters'</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">init_params</span><span class="p">(</span><span class="n">initializer</span><span class="o">=</span><span class="n">initializer</span><span class="p">,</span> <span class="n">arg_params</span><span class="o">=</span><span class="n">arg_params</span><span class="p">,</span> |
| <span class="n">aux_params</span><span class="o">=</span><span class="n">aux_params</span><span class="p">,</span> <span class="n">allow_missing</span><span class="o">=</span><span class="n">allow_missing</span><span class="p">,</span> |
| <span class="n">force_init</span><span class="o">=</span><span class="n">force_init</span><span class="p">,</span> <span class="n">allow_extra</span><span class="o">=</span><span class="n">allow_extra</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_params_dirty</span> <span class="o">=</span> <span class="bp">False</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> <span class="o">=</span> <span class="bp">True</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.get_states"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.get_states">[docs]</a> <span class="k">def</span> <span class="nf">get_states</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">merge_multi_context</span><span class="o">=</span><span class="bp">True</span><span class="p">):</span> |
| <span class="sd">"""Gets states from all devices.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> merge_multi_context : bool</span> |
| <span class="sd"> Default is `True`. In the case when data-parallelism is used, the states</span> |
| <span class="sd"> will be collected from multiple devices. A `True` value indicate that we</span> |
| <span class="sd"> should merge the collected results so that they look like from a single</span> |
| <span class="sd"> executor.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> list of NDArrays or list of list of NDArrays</span> |
| <span class="sd"> If `merge_multi_context` is ``True``, it is like ``[out1, out2]``. Otherwise, it</span> |
| <span class="sd"> is like ``[[out1_dev1, out1_dev2], [out2_dev1, out2_dev2]]``. All the output</span> |
| <span class="sd"> elements are `NDArray`.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">get_states</span><span class="p">(</span><span class="n">merge_multi_context</span><span class="o">=</span><span class="n">merge_multi_context</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.set_states"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.set_states">[docs]</a> <span class="k">def</span> <span class="nf">set_states</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">states</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">value</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span> |
| <span class="sd">"""Sets value for states. Only one of states & values can be specified.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> states : list of list of NDArrays</span> |
| <span class="sd"> Source states arrays formatted like ``[[state1_dev1, state1_dev2],</span> |
| <span class="sd"> [state2_dev1, state2_dev2]]``.</span> |
| <span class="sd"> value : number</span> |
| <span class="sd"> A single scalar value for all state arrays.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">set_states</span><span class="p">(</span><span class="n">states</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.bind"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.bind">[docs]</a> <span class="k">def</span> <span class="nf">bind</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data_shapes</span><span class="p">,</span> <span class="n">label_shapes</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">for_training</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> |
| <span class="n">inputs_need_grad</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">force_rebind</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">shared_module</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> |
| <span class="n">grad_req</span><span class="o">=</span><span class="s1">'write'</span><span class="p">):</span> |
| <span class="sd">"""Binding for a `BucketingModule` means setting up the buckets and binding the</span> |
| <span class="sd"> executor for the default bucket key. Executors corresponding to other keys are</span> |
| <span class="sd"> bound afterwards with `switch_bucket`.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> data_shapes : list of (str, tuple)</span> |
| <span class="sd"> This should correspond to the symbol for the default bucket.</span> |
| <span class="sd"> label_shapes : list of (str, tuple)</span> |
| <span class="sd"> This should correspond to the symbol for the default bucket.</span> |
| <span class="sd"> for_training : bool</span> |
| <span class="sd"> Default is ``True``.</span> |
| <span class="sd"> inputs_need_grad : bool</span> |
| <span class="sd"> Default is ``False``.</span> |
| <span class="sd"> force_rebind : bool</span> |
| <span class="sd"> Default is ``False``.</span> |
| <span class="sd"> shared_module : BucketingModule</span> |
| <span class="sd"> Default is ``None``. This value is currently not used.</span> |
| <span class="sd"> grad_req : str, list of str, dict of str to str</span> |
| <span class="sd"> Requirement for gradient accumulation. Can be 'write', 'add', or 'null'</span> |
| <span class="sd"> (default to 'write').</span> |
| <span class="sd"> Can be specified globally (str) or for each argument (list, dict).</span> |
| <span class="sd"> bucket_key : str (or any python object)</span> |
| <span class="sd"> bucket key for binding. by default use the default_bucket_key</span> |
| <span class="sd"> """</span> |
| <span class="c1"># in case we already initialized params, keep it</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span><span class="p">:</span> |
| <span class="n">arg_params</span><span class="p">,</span> <span class="n">aux_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_params</span><span class="p">()</span> |
| |
| <span class="c1"># force rebinding is typically used when one want to switch from</span> |
| <span class="c1"># training to prediction phase.</span> |
| <span class="k">if</span> <span class="n">force_rebind</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_reset_bind</span><span class="p">()</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s1">'Already bound, ignoring bind()'</span><span class="p">)</span> |
| <span class="k">return</span> |
| |
| <span class="k">assert</span> <span class="n">shared_module</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">,</span> <span class="s1">'shared_module for BucketingModule is not supported'</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">for_training</span> <span class="o">=</span> <span class="n">for_training</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inputs_need_grad</span> <span class="o">=</span> <span class="n">inputs_need_grad</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="o">=</span> <span class="bp">True</span> |
| |
| <span class="n">symbol</span><span class="p">,</span> <span class="n">data_names</span><span class="p">,</span> <span class="n">label_names</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_sym_gen</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_default_bucket_key</span><span class="p">)</span> |
| <span class="n">module</span> <span class="o">=</span> <span class="n">Module</span><span class="p">(</span><span class="n">symbol</span><span class="p">,</span> <span class="n">data_names</span><span class="p">,</span> <span class="n">label_names</span><span class="p">,</span> <span class="n">logger</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="p">,</span> |
| <span class="n">context</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_context</span><span class="p">,</span> <span class="n">work_load_list</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_work_load_list</span><span class="p">,</span> |
| <span class="n">fixed_param_names</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_fixed_param_names</span><span class="p">,</span> |
| <span class="n">state_names</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_state_names</span><span class="p">,</span> |
| <span class="n">group2ctxs</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_group2ctxs</span><span class="p">,</span> |
| <span class="n">compression_params</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_compression_params</span><span class="p">)</span> |
| <span class="n">module</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="n">data_shapes</span><span class="p">,</span> <span class="n">label_shapes</span><span class="p">,</span> <span class="n">for_training</span><span class="p">,</span> <span class="n">inputs_need_grad</span><span class="p">,</span> |
| <span class="n">force_rebind</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">shared_module</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">grad_req</span><span class="o">=</span><span class="n">grad_req</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span> <span class="o">=</span> <span class="n">module</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_bucket_key</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_default_bucket_key</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_default_bucket_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">module</span> |
| |
| <span class="c1"># copy back saved params, if already initialized</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">set_params</span><span class="p">(</span><span class="n">arg_params</span><span class="p">,</span> <span class="n">aux_params</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.switch_bucket"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.switch_bucket">[docs]</a> <span class="k">def</span> <span class="nf">switch_bucket</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bucket_key</span><span class="p">,</span> <span class="n">data_shapes</span><span class="p">,</span> <span class="n">label_shapes</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span> |
| <span class="sd">"""Switches to a different bucket. This will change ``self.curr_module``.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> bucket_key : str (or any python object)</span> |
| <span class="sd"> The key of the target bucket.</span> |
| <span class="sd"> data_shapes : list of (str, tuple)</span> |
| <span class="sd"> Typically ``data_batch.provide_data``.</span> |
| <span class="sd"> label_shapes : list of (str, tuple)</span> |
| <span class="sd"> Typically ``data_batch.provide_label``.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span><span class="p">,</span> <span class="s1">'call bind before switching bucket'</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">bucket_key</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span><span class="p">:</span> |
| <span class="n">symbol</span><span class="p">,</span> <span class="n">data_names</span><span class="p">,</span> <span class="n">label_names</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_sym_gen</span><span class="p">(</span><span class="n">bucket_key</span><span class="p">)</span> |
| <span class="n">module</span> <span class="o">=</span> <span class="n">Module</span><span class="p">(</span><span class="n">symbol</span><span class="p">,</span> <span class="n">data_names</span><span class="p">,</span> <span class="n">label_names</span><span class="p">,</span> |
| <span class="n">logger</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_context</span><span class="p">,</span> |
| <span class="n">work_load_list</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_work_load_list</span><span class="p">,</span> |
| <span class="n">fixed_param_names</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_fixed_param_names</span><span class="p">,</span> |
| <span class="n">state_names</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_state_names</span><span class="p">,</span> |
| <span class="n">group2ctxs</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_group2ctxs</span><span class="p">,</span> |
| <span class="n">compression_params</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_compression_params</span><span class="p">)</span> |
| <span class="n">module</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="n">data_shapes</span><span class="p">,</span> <span class="n">label_shapes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">for_training</span><span class="p">,</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">inputs_need_grad</span><span class="p">,</span> |
| <span class="n">force_rebind</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">shared_module</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_default_bucket_key</span><span class="p">])</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_monitor</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span> |
| <span class="n">module</span><span class="o">.</span><span class="n">install_monitor</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_monitor</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span><span class="p">[</span><span class="n">bucket_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">module</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span><span class="p">[</span><span class="n">bucket_key</span><span class="p">]</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_bucket_key</span> <span class="o">=</span> <span class="n">bucket_key</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.init_optimizer"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.init_optimizer">[docs]</a> <span class="k">def</span> <span class="nf">init_optimizer</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">kvstore</span><span class="o">=</span><span class="s1">'local'</span><span class="p">,</span> <span class="n">optimizer</span><span class="o">=</span><span class="s1">'sgd'</span><span class="p">,</span> |
| <span class="n">optimizer_params</span><span class="o">=</span><span class="p">((</span><span class="s1">'learning_rate'</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">),),</span> |
| <span class="n">force_init</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span> |
| <span class="sd">"""Installs and initializes optimizers.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> kvstore : str or KVStore</span> |
| <span class="sd"> Defaults to `'local'`.</span> |
| <span class="sd"> optimizer : str or Optimizer</span> |
| <span class="sd"> Defaults to `'sgd'`</span> |
| <span class="sd"> optimizer_params : dict</span> |
| <span class="sd"> Defaults to `(('learning_rate', 0.01),)`. The default value is not a dictionary,</span> |
| <span class="sd"> just to avoid pylint warning of dangerous default values.</span> |
| <span class="sd"> force_init : bool</span> |
| <span class="sd"> Defaults to ``False``, indicating whether we should force re-initializing the</span> |
| <span class="sd"> optimizer in the case an optimizer is already installed.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">optimizer_initialized</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">force_init</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s1">'optimizer already initialized, ignoring.'</span><span class="p">)</span> |
| <span class="k">return</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">init_optimizer</span><span class="p">(</span><span class="n">kvstore</span><span class="p">,</span> <span class="n">optimizer</span><span class="p">,</span> <span class="n">optimizer_params</span><span class="p">,</span> |
| <span class="n">force_init</span><span class="o">=</span><span class="n">force_init</span><span class="p">)</span> |
| <span class="k">for</span> <span class="n">mod</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> |
| <span class="k">if</span> <span class="n">mod</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="p">:</span> |
| <span class="n">mod</span><span class="o">.</span><span class="n">borrow_optimizer</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">optimizer_initialized</span> <span class="o">=</span> <span class="bp">True</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.prepare"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.prepare">[docs]</a> <span class="k">def</span> <span class="nf">prepare</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data_batch</span><span class="p">):</span> |
| <span class="sd">"""Prepares a data batch for forward.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> data_batch : DataBatch</span> |
| <span class="sd"> """</span> |
| <span class="c1"># perform bind if haven't done so</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="n">bucket_key</span> <span class="o">=</span> <span class="n">data_batch</span><span class="o">.</span><span class="n">bucket_key</span> |
| <span class="n">original_bucket_key</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_bucket_key</span> |
| <span class="n">data_shapes</span> <span class="o">=</span> <span class="n">data_batch</span><span class="o">.</span><span class="n">provide_data</span> |
| <span class="n">label_shapes</span> <span class="o">=</span> <span class="n">data_batch</span><span class="o">.</span><span class="n">provide_label</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">switch_bucket</span><span class="p">(</span><span class="n">bucket_key</span><span class="p">,</span> <span class="n">data_shapes</span><span class="p">,</span> <span class="n">label_shapes</span><span class="p">)</span> |
| <span class="c1"># switch back</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">switch_bucket</span><span class="p">(</span><span class="n">original_bucket_key</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.forward"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.forward">[docs]</a> <span class="k">def</span> <span class="nf">forward</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data_batch</span><span class="p">,</span> <span class="n">is_train</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span> |
| <span class="sd">"""Forward computation.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> data_batch : DataBatch</span> |
| <span class="sd"> is_train : bool</span> |
| <span class="sd"> Defaults to ``None``, in which case `is_train` is take as ``self.for_training``.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">switch_bucket</span><span class="p">(</span><span class="n">data_batch</span><span class="o">.</span><span class="n">bucket_key</span><span class="p">,</span> <span class="n">data_batch</span><span class="o">.</span><span class="n">provide_data</span><span class="p">,</span> |
| <span class="n">data_batch</span><span class="o">.</span><span class="n">provide_label</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">forward</span><span class="p">(</span><span class="n">data_batch</span><span class="p">,</span> <span class="n">is_train</span><span class="o">=</span><span class="n">is_train</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.backward"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.backward">[docs]</a> <span class="k">def</span> <span class="nf">backward</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">out_grads</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span> |
| <span class="sd">"""Backward computation."""</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">backward</span><span class="p">(</span><span class="n">out_grads</span><span class="o">=</span><span class="n">out_grads</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.update"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.update">[docs]</a> <span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Updates parameters according to installed optimizer and the gradient computed</span> |
| <span class="sd"> in the previous forward-backward cycle.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">optimizer_initialized</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_params_dirty</span> <span class="o">=</span> <span class="bp">True</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">update</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.get_outputs"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.get_outputs">[docs]</a> <span class="k">def</span> <span class="nf">get_outputs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">merge_multi_context</span><span class="o">=</span><span class="bp">True</span><span class="p">):</span> |
| <span class="sd">"""Gets outputs from a previous forward computation.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> merge_multi_context : bool</span> |
| <span class="sd"> Defaults to ``True``. In the case when data-parallelism is used, the outputs</span> |
| <span class="sd"> will be collected from multiple devices. A ``True`` value indicate that we</span> |
| <span class="sd"> should merge the collected results so that they look like from a single</span> |
| <span class="sd"> executor.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> list of numpy arrays or list of list of numpy arrays</span> |
| <span class="sd"> If `merge_multi_context` is ``True``, it is like ``[out1, out2]``. Otherwise, it</span> |
| <span class="sd"> is like ``[[out1_dev1, out1_dev2], [out2_dev1, out2_dev2]]``. All the output</span> |
| <span class="sd"> elements are numpy arrays.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">get_outputs</span><span class="p">(</span><span class="n">merge_multi_context</span><span class="o">=</span><span class="n">merge_multi_context</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.get_input_grads"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.get_input_grads">[docs]</a> <span class="k">def</span> <span class="nf">get_input_grads</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">merge_multi_context</span><span class="o">=</span><span class="bp">True</span><span class="p">):</span> |
| <span class="sd">"""Gets the gradients with respect to the inputs of the module.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> merge_multi_context : bool</span> |
| <span class="sd"> Defaults to ``True``. In the case when data-parallelism is used, the outputs</span> |
| <span class="sd"> will be collected from multiple devices. A ``True`` value indicate that we</span> |
| <span class="sd"> should merge the collected results so that they look like from a single</span> |
| <span class="sd"> executor.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> list of NDArrays or list of list of NDArrays</span> |
| <span class="sd"> If `merge_multi_context` is ``True``, it is like ``[grad1, grad2]``. Otherwise, it</span> |
| <span class="sd"> is like ``[[grad1_dev1, grad1_dev2], [grad2_dev1, grad2_dev2]]``. All the output</span> |
| <span class="sd"> elements are `NDArray`.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">inputs_need_grad</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">get_input_grads</span><span class="p">(</span><span class="n">merge_multi_context</span><span class="o">=</span><span class="n">merge_multi_context</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BucketingModule.update_metric"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.update_metric">[docs]</a> <span class="k">def</span> <span class="nf">update_metric</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">eval_metric</span><span class="p">,</span> <span class="n">labels</span><span class="p">):</span> |
| <span class="sd">"""Evaluates and accumulates evaluation metric on outputs of the last forward computation.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> eval_metric : EvalMetric</span> |
| <span class="sd"> labels : list of NDArray</span> |
| <span class="sd"> Typically ``data_batch.label``.</span> |
| <span class="sd"> """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">params_initialized</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">update_metric</span><span class="p">(</span><span class="n">eval_metric</span><span class="p">,</span> <span class="n">labels</span><span class="p">)</span></div> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">symbol</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""The symbol of the current bucket being used."""</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_curr_module</span><span class="o">.</span><span class="n">symbol</span> |
| |
| <div class="viewcode-block" id="BucketingModule.install_monitor"><a class="viewcode-back" href="../../../api/python/module/module.html#mxnet.module.BucketingModule.install_monitor">[docs]</a> <span class="k">def</span> <span class="nf">install_monitor</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">mon</span><span class="p">):</span> |
| <span class="sd">"""Installs monitor on all executors """</span> |
| <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">binded</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_monitor</span> <span class="o">=</span> <span class="n">mon</span> |
| <span class="k">for</span> <span class="n">mod</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_buckets</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> |
| <span class="n">mod</span><span class="o">.</span><span class="n">install_monitor</span><span class="p">(</span><span class="n">mon</span><span class="p">)</span></div></div> |
| </pre></div> |
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