# Copyright (c) 2019 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. """BERT pretraining.""" from __future__ import absolute_import from __future__ import division from __future__ import print_function import os import time import argparse import numpy as np import multiprocessing import paddle import paddle.fluid as fluid from reader.pretraining import DataReader from model.bert import BertModel, BertConfig from optimization import optimization from utils.args import ArgumentGroup, print_arguments, check_cuda from utils.init import init_checkpoint, init_pretraining_params # yapf: disable parser = argparse.ArgumentParser(__doc__) model_g = ArgumentGroup(parser, "model", "model configuration and paths.") model_g.add_arg("bert_config_path", str, "./config/bert_config.json", "Path to the json file for bert model config.") model_g.add_arg("init_checkpoint", str, None, "Init checkpoint to resume training from.") model_g.add_arg("checkpoints", str, "checkpoints", "Path to save checkpoints.") model_g.add_arg("weight_sharing", bool, True, "If set, share weights between word embedding and masked lm.") model_g.add_arg("generate_neg_sample", bool, True, "If set, randomly generate negtive samples by positive samples.") train_g = ArgumentGroup(parser, "training", "training options.") train_g.add_arg("epoch", int, 100, "Number of epoches for training.") train_g.add_arg("learning_rate", float, 0.0001, "Learning rate used to train with warmup.") train_g.add_arg("lr_scheduler", str, "linear_warmup_decay", "scheduler of learning rate.", choices=['linear_warmup_decay', 'noam_decay']) train_g.add_arg("weight_decay", float, 0.01, "Weight decay rate for L2 regularizer.") train_g.add_arg("num_train_steps", int, 1000000, "Total steps to perform pretraining.") train_g.add_arg("warmup_steps", int, 4000, "Total steps to perform warmup when pretraining.") train_g.add_arg("save_steps", int, 10000, "The steps interval to save checkpoints.") train_g.add_arg("validation_steps", int, 1000, "The steps interval to evaluate model performance.") train_g.add_arg("use_fp16", bool, False, "Whether to use fp16 mixed precision training.") train_g.add_arg("loss_scaling", float, 1.0, "Loss scaling factor for mixed precision training, only valid when use_fp16 is enabled.") log_g = ArgumentGroup(parser, "logging", "logging related.") log_g.add_arg("skip_steps", int, 10, "The steps interval to print loss.") log_g.add_arg("verbose", bool, False, "Whether to output verbose log.") data_g = ArgumentGroup(parser, "data", "Data paths, vocab paths and data processing options") data_g.add_arg("data_dir", str, "./data/train/", "Path to training data.") data_g.add_arg("validation_set_dir", str, "./data/validation/", "Path to validation data.") data_g.add_arg("test_set_dir", str, None, "Path to test data.") data_g.add_arg("vocab_path", str, "./config/vocab.txt", "Vocabulary path.") data_g.add_arg("max_seq_len", int, 512, "Tokens' number of the longest seqence allowed.") data_g.add_arg("batch_size", int, 8192, "The total number of examples in one batch for training, see also --in_tokens.") data_g.add_arg("in_tokens", bool, True, "If set, the batch size will be the maximum number of tokens in one batch. " "Otherwise, it will be the maximum number of examples in one batch.") run_type_g = ArgumentGroup(parser, "run_type", "running type options.") run_type_g.add_arg("is_distributed", bool, False, "If set, then start distributed training.") run_type_g.add_arg("use_cuda", bool, True, "If set, use GPU for training.") run_type_g.add_arg("use_fast_executor", bool, False, "If set, use fast parallel executor (in experiment).") run_type_g.add_arg("num_iteration_per_drop_scope", int, 1, "Ihe iteration intervals to clean up temporary variables.") run_type_g.add_arg("do_test", bool, False, "Whether to perform evaluation on test data set.") args = parser.parse_args() # yapf: enable. def create_model(pyreader_name, bert_config): pyreader = fluid.layers.py_reader( capacity=70, shapes=[[-1, args.max_seq_len, 1], [-1, args.max_seq_len, 1], [-1, args.max_seq_len, 1], [-1, args.max_seq_len, 1], [-1, 1], [-1, 1], [-1, 1]], dtypes=[ 'int64', 'int64', 'int64', 'float32', 'int64', 'int64', 'int64' ], lod_levels=[0, 0, 0, 0, 0, 0, 0], name=pyreader_name, use_double_buffer=True) (src_ids, pos_ids, sent_ids, input_mask, mask_label, mask_pos, labels) = fluid.layers.read_file(pyreader) bert = BertModel( src_ids=src_ids, position_ids=pos_ids, sentence_ids=sent_ids, input_mask=input_mask, config=bert_config, weight_sharing=args.weight_sharing, use_fp16=args.use_fp16) next_sent_acc, mask_lm_loss, total_loss = bert.get_pretraining_output( mask_label, mask_pos, labels) if args.use_fp16 and args.loss_scaling > 1.0: total_loss *= args.loss_scaling return pyreader, next_sent_acc, mask_lm_loss, total_loss def predict_wrapper(args, exe, bert_config, test_prog=None, pyreader=None, fetch_list=None): # Context to do validation. data_path = args.test_set_dir if args.do_test else args.validation_set_dir data_reader = DataReader( data_path, vocab_path=args.vocab_path, batch_size=args.batch_size, in_tokens=args.in_tokens, voc_size=bert_config['vocab_size'], shuffle_files=False, epoch=1, max_seq_len=args.max_seq_len, is_test=True) if args.do_test: assert args.init_checkpoint is not None, "[FATAL] Please use --init_checkpoint '/path/to/checkpoints' \ to specify you pretrained model checkpoints" init_pretraining_params(exe, args.init_checkpoint, test_prog) def predict(exe=exe, pyreader=pyreader): pyreader.decorate_tensor_provider(data_reader.data_generator()) pyreader.start() cost = 0 lm_cost = 0 acc = 0 steps = 0 time_begin = time.time() while True: try: each_next_acc, each_mask_lm_cost, each_total_cost = exe.run( fetch_list=fetch_list, program=test_prog) acc += each_next_acc lm_cost += each_mask_lm_cost cost += each_total_cost steps += 1 if args.do_test and steps % args.skip_steps == 0: print("[test_set] steps: %d" % steps) except fluid.core.EOFException: pyreader.reset() break used_time = time.time() - time_begin return cost, lm_cost, acc, steps, (args.skip_steps / used_time) return predict def test(args): bert_config = BertConfig(args.bert_config_path) bert_config.print_config() test_prog = fluid.Program() test_startup = fluid.Program() with fluid.program_guard(test_prog, test_startup): with fluid.unique_name.guard(): test_pyreader, next_sent_acc, mask_lm_loss, total_loss = create_model( pyreader_name='test_reader', bert_config=bert_config) test_prog = test_prog.clone(for_test=True) place = fluid.CUDAPlace(0) if args.use_cuda == True else fluid.CPUPlace() exe = fluid.Executor(place) exe.run(test_startup) predict = predict_wrapper( args, exe, bert_config, test_prog=test_prog, pyreader=test_pyreader, fetch_list=[next_sent_acc.name, mask_lm_loss.name, total_loss.name]) print("test begin") loss, lm_loss, acc, steps, speed = predict() print( "[test_set] loss: %f, global ppl: %f, next_sent_acc: %f, speed: %f steps/s" % (np.mean(np.array(loss) / steps), np.exp(np.mean(np.array(lm_loss) / steps)), np.mean(np.array(acc) / steps), speed)) def train(args): print("pretraining start") bert_config = BertConfig(args.bert_config_path) bert_config.print_config() train_program = fluid.Program() startup_prog = fluid.Program() with fluid.program_guard(train_program, startup_prog): with fluid.unique_name.guard(): train_pyreader, next_sent_acc, mask_lm_loss, total_loss = create_model( pyreader_name='train_reader', bert_config=bert_config) scheduled_lr = optimization( loss=total_loss, warmup_steps=args.warmup_steps, num_train_steps=args.num_train_steps, learning_rate=args.learning_rate, train_program=train_program, startup_prog=startup_prog, weight_decay=args.weight_decay, scheduler=args.lr_scheduler, use_fp16=args.use_fp16, loss_scaling=args.loss_scaling) fluid.memory_optimize( input_program=train_program, skip_opt_set=[ next_sent_acc.name, mask_lm_loss.name, total_loss.name ]) test_prog = fluid.Program() with fluid.program_guard(test_prog, startup_prog): with fluid.unique_name.guard(): test_pyreader, next_sent_acc, mask_lm_loss, total_loss = create_model( pyreader_name='test_reader', bert_config=bert_config) test_prog = test_prog.clone(for_test=True) if args.use_cuda: place = fluid.CUDAPlace(0) dev_count = fluid.core.get_cuda_device_count() else: place = fluid.CPUPlace() dev_count = int(os.environ.get('CPU_NUM', multiprocessing.cpu_count())) print("Device count %d" % dev_count) if args.verbose: if args.in_tokens: lower_mem, upper_mem, unit = fluid.contrib.memory_usage( program=train_program, batch_size=args.batch_size // args.max_seq_len) else: lower_mem, upper_mem, unit = fluid.contrib.memory_usage( program=train_program, batch_size=args.batch_size) print("Theoretical memory usage in training: %.3f - %.3f %s" % (lower_mem, upper_mem, unit)) nccl2_num_trainers = 1 nccl2_trainer_id = 0 print("args.is_distributed:", args.is_distributed) if args.is_distributed: worker_endpoints_env = os.getenv("worker_endpoints") worker_endpoints = worker_endpoints_env.split(",") trainers_num = len(worker_endpoints) current_endpoint = os.getenv("current_endpoint") trainer_id = worker_endpoints.index(current_endpoint) if trainer_id == 0: print("train_id == 0, sleep 60s") time.sleep(60) print("worker_endpoints:{} trainers_num:{} current_endpoint:{} \ trainer_id:{}" .format(worker_endpoints, trainers_num, current_endpoint, trainer_id)) # prepare nccl2 env. config = fluid.DistributeTranspilerConfig() config.mode = "nccl2" t = fluid.DistributeTranspiler(config=config) t.transpile( trainer_id, trainers=worker_endpoints_env, current_endpoint=current_endpoint, program=train_program, startup_program=startup_prog) nccl2_num_trainers = trainers_num nccl2_trainer_id = trainer_id exe = fluid.Executor(place) exe.run(startup_prog) if args.init_checkpoint and args.init_checkpoint != "": init_checkpoint(exe, args.init_checkpoint, train_program, args.use_fp16) data_reader = DataReader( data_dir=args.data_dir, batch_size=args.batch_size, in_tokens=args.in_tokens, vocab_path=args.vocab_path, voc_size=bert_config['vocab_size'], epoch=args.epoch, max_seq_len=args.max_seq_len, generate_neg_sample=args.generate_neg_sample) exec_strategy = fluid.ExecutionStrategy() exec_strategy.use_experimental_executor = args.use_fast_executor exec_strategy.num_threads = dev_count exec_strategy.num_iteration_per_drop_scope = args.num_iteration_per_drop_scope # use_ngraph is for CPU only, please refer to README_ngraph.md for details use_ngraph = os.getenv('FLAGS_use_ngraph') if not use_ngraph: train_exe = fluid.ParallelExecutor( use_cuda=args.use_cuda, loss_name=total_loss.name, exec_strategy=exec_strategy, main_program=train_program, num_trainers=nccl2_num_trainers, trainer_id=nccl2_trainer_id) else: train_exe = exe if args.validation_set_dir and args.validation_set_dir != "": predict = predict_wrapper( args, exe, bert_config, test_prog=test_prog, pyreader=test_pyreader, fetch_list=[ next_sent_acc.name, mask_lm_loss.name, total_loss.name ]) train_pyreader.decorate_tensor_provider(data_reader.data_generator()) train_pyreader.start() steps = 0 cost = [] lm_cost = [] acc = [] time_begin = time.time() while steps < args.num_train_steps: try: steps += nccl2_num_trainers skip_steps = args.skip_steps * nccl2_num_trainers if nccl2_trainer_id != 0: if use_ngraph: train_exe.run(fetch_list=[], program=train_program) else: train_exe.run(fetch_list=[]) continue if steps % skip_steps != 0: if use_ngraph: train_exe.run(fetch_list=[], program=train_program) else: train_exe.run(fetch_list=[]) else: if use_ngraph: each_next_acc, each_mask_lm_cost, each_total_cost, np_lr = train_exe.run( fetch_list=[ next_sent_acc.name, mask_lm_loss.name, total_loss.name, scheduled_lr.name], program=train_program) else: each_next_acc, each_mask_lm_cost, each_total_cost, np_lr = train_exe.run( fetch_list=[ next_sent_acc.name, mask_lm_loss.name, total_loss.name, scheduled_lr.name]) acc.extend(each_next_acc) lm_cost.extend(each_mask_lm_cost) cost.extend(each_total_cost) print("feed_queue size", train_pyreader.queue.size()) time_end = time.time() used_time = time_end - time_begin epoch, current_file_index, total_file, current_file = data_reader.get_progress( ) print("current learning_rate:%f" % np_lr[0]) print("epoch: %d, progress: %d/%d, step: %d, loss: %f, " "ppl: %f, next_sent_acc: %f, speed: %f steps/s, file: %s" % (epoch, current_file_index, total_file, steps, np.mean(np.array(cost)), np.mean(np.exp(np.array(lm_cost))), np.mean(np.array(acc)), skip_steps / used_time, current_file)) cost = [] lm_cost = [] acc = [] time_begin = time.time() if steps % args.save_steps == 0: save_path = os.path.join(args.checkpoints, "step_" + str(steps)) fluid.io.save_persistables(exe, save_path, train_program) if args.validation_set_dir and steps % args.validation_steps == 0: vali_cost, vali_lm_cost, vali_acc, vali_steps, vali_speed = predict( ) print("[validation_set] epoch: %d, step: %d, " "loss: %f, global ppl: %f, batch-averged ppl: %f, " "next_sent_acc: %f, speed: %f steps/s" % (epoch, steps, np.mean(np.array(vali_cost) / vali_steps), np.exp(np.mean(np.array(vali_lm_cost) / vali_steps)), np.mean(np.exp(np.array(vali_lm_cost) / vali_steps)), np.mean(np.array(vali_acc) / vali_steps), vali_speed)) except fluid.core.EOFException: train_pyreader.reset() break if __name__ == '__main__': print_arguments(args) check_cuda(args.use_cuda) if args.do_test: test(args) else: train(args)