# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import multiprocessing import os import six import sys from .. import compat as cpt from . import framework from .framework import cuda_places, cpu_places from . import core __all__ = ['CompiledProgram', 'ExecutionStrategy', 'BuildStrategy'] ExecutionStrategy = core.ParallelExecutor.ExecutionStrategy BuildStrategy = core.ParallelExecutor.BuildStrategy InferNativeConfig = core.NativeConfig InferAnalysisConfig = core.AnalysisConfig def _place_obj(place): p = core.Place() p.set_place(place) return p def _is_pserver_mode(main_program): main = main_program if main_program \ else framework.default_main_program() for op in main.global_block().ops: if op.type in ["send", "recv"]: return True return False class CompiledProgram(object): """ Compiles to Graph for execution. 1. Users first create the program with layers. 2. Optionally, users use CompiledProgram to optimize the program before run. 3. The original program or CompiledProgram is run by executor. The CompiledProgram is used to transform a program for various optimizations, for example. * Pre-compute some logic once so that each run is faster. * Transform the program so that it can run in multiple devices. * TODO: transform the program for optimized inference or distributed training. Example: .. code-block:: python place = fluid.CUDAPlace(0) if use_gpu else fluid.CPUPlace() exe = fluid.Executor(place) exe.run(startup) compiled_prog = compiler.CompiledProgram(main).with_data_parallel( loss_name=loss.name) for i in range(5): test_loss, = exe.run(compiled_prog, feed=feed_dict, fetch_list=[loss.name]) Args: program_or_graph (Graph|Program): If it's Program, it will be first lowered to a graph for further optimizations. If it's a graph (potentially optimized before), it will be directly used for further optimizations. Note: graph is only supported when compiled with with_data_parallel option. """ def __init__(self, program_or_graph): if isinstance(program_or_graph, core.Graph): self._graph = program_or_graph self._program = None elif isinstance(program_or_graph, framework.Program): self._graph = core.Graph(program_or_graph.desc) self._program = program_or_graph else: raise ValueError("Wrong program_to_graph type: %s" % type(program_or_graph)) self._program_desc = self._graph.origin_program_desc() self._scope = None self._place = None self._executor = None self._compiled = False self._is_data_parallel = False self._is_inference = False def with_data_parallel(self, loss_name=None, build_strategy=None, exec_strategy=None, share_vars_from=None, places=None): """Configs the program to run in data parallel way. Args: loss_name (str): The loss name must set in training. Default None. build_strategy(BuildStrategy): build_strategy is used to build the graph so it can run on multiple devices/cores with optimized topology. For more information, please refer to fluid.BuildStrategy. Default None. exec_strategy(ExecutionStrategy): exec_strategy is used to to select the a way to execute the graph, for example how many threads are used, how many iterations to clean up the temp variables. For more information, please refer to fluid.ExecutionStrategy. Default None. share_vars_from(CompiledProgram): If provided, this CompiledProgram will share variables from `share_vars_from`. `share_vars_from` must be run by the executor before this CompiledProgram so that vars are ready. places(list(CUDAPlace)|list(CPUPlace)|None): If provided, only compile program in the given places. Otherwise, the places used when compiled is determined by the Executor, and the places used are controlled by environment variables: FLAGS_selected_gpus or CUDA_VISIBLE_DEVICES if using GPU; or CPU_NUM if using CPU. For example, if you want to run on GPU 0 and 1, set places=[fluid.CUDAPlace(0), fluid.CUDAPlace(1)]. If you want to run on 2 CPU cores, set places=[fluid.CPUPlace()]*2. Returns: self """ assert not self._is_data_parallel, "Already compiled with parallel." assert not self._is_inference, "Cannot compile both data parallel and inference" self._is_data_parallel = True self._build_strategy = build_strategy self._exec_strategy = exec_strategy self._loss_name = loss_name self._share_vars_from = share_vars_from if self._exec_strategy is None: self._exec_strategy = ExecutionStrategy() if self._build_strategy is None: self._build_strategy = BuildStrategy() if places is not None: if not isinstance(places, (list, tuple)): places = [places] self._places = places else: self._places = None self._build_strategy.is_distribution = _is_pserver_mode(self._program) return self def with_inference_optimize(self, config): """ Add inference optimize Args: config: instance of `NativeConfig` or `AnalysisConfig` to create predictor Returns: self """ assert not self._is_data_parallel, "Cannot compile both data parallel and inference" assert not self._is_inference, "Already compiled with inference" assert any([ isinstance(config, InferNativeConfig), isinstance(config, InferAnalysisConfig) ]) self._is_inference = True self._infer_config = config return self def _with_distributed(self): raise NotImplementedError() def _compile_data_parallel(self, use_cuda=False, scope=None): if self._share_vars_from: if scope: sys.stderr.write("share_vars_from is set, scope is ignored.\n") if not self._share_vars_from._is_data_parallel: raise ValueError("share_vars_from is not data parallel. Cannot " "share vars from it.") if self._share_vars_from._executor is None: raise ValueError( "share_vars_from is not compiled and run, so there is no " "var to share.") self._local_scopes = self._share_vars_from._executor.local_scopes() else: assert scope is not None, "" self._local_scopes = [] self._exec_strategy.use_cuda = use_cuda has_set_place = (self._places is not None) if has_set_place: for p in self._places: assert p._type() == self._place._type(), \ "Place type not match. You may set the wrong type of places" else: self._places = cuda_places( ) if self._exec_strategy.use_cuda else cpu_places() assert self._places, "no place for execution" if self._exec_strategy.num_threads == 0: if self._exec_strategy.use_cuda: # Experiments on se-resnext shows that too many threads hurt # performance. Worth tunning for other models in the future. self._exec_strategy.num_threads = len(self._places) * 4 else: self._exec_strategy.num_threads = len(self._places) * 2 # FIXME(dzhwinter): enable_inplace should be after memory_optimize # if turn on python memory optimize, turn off the inplace_pass. # memory_optimize and enable_inplace default are True, but we can disable them on purpose if self._program and self._program._is_mem_optimized: self._build_strategy.memory_optimize = False if self._program and self._program._is_mem_optimized: self._build_strategy.enable_inplace = False # TODO(wuyi): trainer endpoings should be passed in through # build_strategy, not program.xxx. if self._program and self._build_strategy.num_trainers > 1 and \ self._program._trainers_endpoints: tps = self._program._trainers_endpoints assert self._build_strategy.num_trainers == len( tps), "num_trainers == len(end_points)" self._build_strategy.trainers_endpoints = tps if self._build_strategy.sync_batch_norm: self._build_strategy.enable_sequential_execution = True self._persistable_vars = [] for node in self._graph.nodes(): if node.is_var() and node.var() is not None and node.var().persistable() and \ node.var().type() != core.VarDesc.VarType.RAW: self._persistable_vars.append(cpt.to_text(node.name())) places = list(map(_place_obj, self._places)) # ParallelExecutor would broadcast all the parameters during initializing. # The parameters of each process should be in the same ordered for the data-parallelism # distributed training to keep the broadcast correct. self._persistable_vars = list(set(self._persistable_vars)) self._persistable_vars.sort() return core.ParallelExecutor( places, self._persistable_vars, cpt.to_text(self._loss_name) if self._loss_name else six.u(''), self._scope, self._local_scopes, self._exec_strategy, self._build_strategy, self._graph) def _compile_inference(self): return core.create_paddle_predictor(self._infer_config) def _compile(self, scope, place): """Compile the program based on the configs. Args: scope: The variables (resources) that are associated with this compiled program. place: The location that the compiled program will be run on. Returns: self """ if self._compiled: if scope and self._scope != scope: raise ValueError("Cannot compile with different scope") if place and not self._place._equals(place): raise ValueError("Cannot compile with different place") return self self._compiled = True self._scope = scope self._place = place if self._is_data_parallel: self._executor = self._compile_data_parallel( use_cuda=isinstance(self._place, core.CUDAPlace), scope=self._scope) elif self._is_inference: self._executor = self._compile_inference() else: p = _place_obj(self._place) self._executor = core.Executor(p) return self