import os import numpy as np import time import sys import paddle import paddle.fluid as fluid from se_resnext import SE_ResNeXt from mobilenet import mobile_net from inception_v4 import inception_v4 import reader import argparse import functools import paddle.fluid.layers.ops as ops from utility import add_arguments, print_arguments from paddle.fluid.initializer import init_on_cpu from paddle.fluid.layers.learning_rate_scheduler import _decay_step_counter import math parser = argparse.ArgumentParser(description=__doc__) add_arg = functools.partial(add_arguments, argparser=parser) add_arg('batch_size', int, 256, "Minibatch size.") add_arg('num_layers', int, 50, "How many layers for SE-ResNeXt model.") add_arg('with_mem_opt', bool, True, "Whether to use memory optimization or not.") add_arg('parallel_exe', bool, True, "Whether to use ParallelExecutor to train or not.") add_arg('init_model', str, None, "Whether to use initialized model.") add_arg('pretrained_model', str, None, "Whether to use pretrained model.") add_arg('lr_strategy', str, "cosine_decay", "Set the learning rate decay strategy.") add_arg('model', str, "se_resnext", "Set the network to use.") def cosine_decay(learning_rate, step_each_epoch, epochs=120): """Applies cosine decay to the learning rate. lr = 0.05 * (math.cos(epoch * (math.pi / 120)) + 1) """ global_step = _decay_step_counter() with init_on_cpu(): epoch = ops.floor(global_step / step_each_epoch) decayed_lr = learning_rate * \ (ops.cos(epoch * (math.pi / epochs)) + 1)/2 return decayed_lr def train_parallel_do(args, learning_rate, batch_size, num_passes, init_model=None, pretrained_model=None, model_save_dir='model', parallel=True, use_nccl=True, lr_strategy=None, layers=50): class_dim = 1000 image_shape = [3, 224, 224] image = fluid.layers.data(name='image', shape=image_shape, dtype='float32') label = fluid.layers.data(name='label', shape=[1], dtype='int64') if parallel: places = fluid.layers.get_places() pd = fluid.layers.ParallelDo(places, use_nccl=use_nccl) with pd.do(): image_ = pd.read_input(image) label_ = pd.read_input(label) if args.model is 'se_resnext': out = SE_ResNeXt( input=image_, class_dim=class_dim, layers=layers) elif args.model is 'mobile_net': out = mobile_net(img=image_, class_dim=class_dim) else: out = inception_v4(img=image_, class_dim=class_dim) cost = fluid.layers.cross_entropy(input=out, label=label_) avg_cost = fluid.layers.mean(x=cost) acc_top1 = fluid.layers.accuracy(input=out, label=label_, k=1) acc_top5 = fluid.layers.accuracy(input=out, label=label_, k=5) pd.write_output(avg_cost) pd.write_output(acc_top1) pd.write_output(acc_top5) avg_cost, acc_top1, acc_top5 = pd() avg_cost = fluid.layers.mean(x=avg_cost) acc_top1 = fluid.layers.mean(x=acc_top1) acc_top5 = fluid.layers.mean(x=acc_top5) else: if args.model is 'se_resnext': out = SE_ResNeXt(input=image, class_dim=class_dim, layers=layers) elif args.model is 'mobile_net': out = mobile_net(img=image, class_dim=class_dim) else: out = inception_v4(img=image, class_dim=class_dim) cost = fluid.layers.cross_entropy(input=out, label=label) avg_cost = fluid.layers.mean(x=cost) acc_top1 = fluid.layers.accuracy(input=out, label=label, k=1) acc_top5 = fluid.layers.accuracy(input=out, label=label, k=5) inference_program = fluid.default_main_program().clone(for_test=True) if "piecewise_decay" in lr_strategy: bd = lr_strategy["piecewise_decay"]["bd"] lr = lr_strategy["piecewise_decay"]["lr"] optimizer = fluid.optimizer.Momentum( learning_rate=fluid.layers.piecewise_decay( boundaries=bd, values=lr), momentum=0.9, regularization=fluid.regularizer.L2Decay(1e-4)) elif "cosine_decay" in lr_strategy: step_each_epoch = lr_strategy["cosine_decay"]["step_each_epoch"] epochs = lr_strategy["cosine_decay"]["epochs"] optimizer = fluid.optimizer.Momentum( learning_rate=cosine_decay( learning_rate=learning_rate, step_each_epoch=step_each_epoch, epochs=epochs), momentum=0.9, regularization=fluid.regularizer.L2Decay(1e-4)) else: optimizer = fluid.optimizer.Momentum( learning_rate=learning_rate, momentum=0.9, regularization=fluid.regularizer.L2Decay(1e-4)) opts = optimizer.minimize(avg_cost) if args.with_mem_opt: fluid.memory_optimize(fluid.default_main_program()) place = fluid.CUDAPlace(0) exe = fluid.Executor(place) exe.run(fluid.default_startup_program()) if init_model is not None: fluid.io.load_persistables(exe, init_model) if pretrained_model: def if_exist(var): return os.path.exists(os.path.join(pretrained_model, var.name)) fluid.io.load_vars(exe, pretrained_model, predicate=if_exist) train_reader = paddle.batch(reader.train(), batch_size=batch_size) test_reader = paddle.batch(reader.test(), batch_size=batch_size) feeder = fluid.DataFeeder(place=place, feed_list=[image, label]) for pass_id in range(num_passes): train_info = [[], [], []] test_info = [[], [], []] for batch_id, data in enumerate(train_reader()): t1 = time.time() loss, acc1, acc5 = exe.run( fluid.default_main_program(), feed=feeder.feed(data), fetch_list=[avg_cost, acc_top1, acc_top5]) t2 = time.time() period = t2 - t1 train_info[0].append(loss[0]) train_info[1].append(acc1[0]) train_info[2].append(acc5[0]) if batch_id % 10 == 0: print("Pass {0}, trainbatch {1}, loss {2}, \ acc1 {3}, acc5 {4} time {5}" .format(pass_id, \ batch_id, loss[0], acc1[0], acc5[0], \ "%2.2f sec" % period)) sys.stdout.flush() train_loss = np.array(train_info[0]).mean() train_acc1 = np.array(train_info[1]).mean() train_acc5 = np.array(train_info[2]).mean() for data in test_reader(): t1 = time.time() loss, acc1, acc5 = exe.run( inference_program, feed=feeder.feed(data), fetch_list=[avg_cost, acc_top1, acc_top5]) t2 = time.time() period = t2 - t1 test_info[0].append(loss[0]) test_info[1].append(acc1[0]) test_info[2].append(acc5[0]) if batch_id % 10 == 0: print("Pass {0},testbatch {1},loss {2}, \ acc1 {3},acc5 {4},time {5}" .format(pass_id, \ batch_id, loss[0], acc1[0], acc5[0], \ "%2.2f sec" % period)) sys.stdout.flush() test_loss = np.array(test_info[0]).mean() test_acc1 = np.array(test_info[1]).mean() test_acc5 = np.array(test_info[2]).mean() print("End pass {0}, train_loss {1}, train_acc1 {2}, train_acc5 {3}, \ test_loss {4}, test_acc1 {5}, test_acc5 {6}" .format(pass_id, \ train_loss, train_acc1, train_acc5, test_loss, test_acc1, \ test_acc5)) sys.stdout.flush() model_path = os.path.join(model_save_dir + '/' + args.model, str(pass_id)) if not os.path.isdir(model_path): os.makedirs(model_path) fluid.io.save_persistables(exe, model_path) def train_parallel_exe(args, learning_rate, batch_size, num_passes, init_model=None, pretrained_model=None, model_save_dir='model', parallel=True, use_nccl=True, lr_strategy=None, layers=50): class_dim = 101 image_shape = [3, 224, 224] image = fluid.layers.data(name='image', shape=image_shape, dtype='float32') label = fluid.layers.data(name='label', shape=[1], dtype='int64') if args.model is 'se_resnext': out = SE_ResNeXt(input=image, class_dim=class_dim, layers=layers) elif args.model is 'mobile_net': out = mobile_net(img=image, class_dim=class_dim) else: out = inception_v4(img=image, class_dim=class_dim) cost = fluid.layers.cross_entropy(input=out, label=label) acc_top1 = fluid.layers.accuracy(input=out, label=label, k=1) acc_top5 = fluid.layers.accuracy(input=out, label=label, k=5) avg_cost = fluid.layers.mean(x=cost) test_program = fluid.default_main_program().clone(for_test=True) if "piecewise_decay" in lr_strategy: bd = lr_strategy["piecewise_decay"]["bd"] lr = lr_strategy["piecewise_decay"]["lr"] optimizer = fluid.optimizer.Momentum( learning_rate=fluid.layers.piecewise_decay( boundaries=bd, values=lr), momentum=0.9, regularization=fluid.regularizer.L2Decay(1e-4)) elif "cosine_decay" in lr_strategy: step_each_epoch = lr_strategy["cosine_decay"]["step_each_epoch"] epochs = lr_strategy["cosine_decay"]["epochs"] optimizer = fluid.optimizer.Momentum( learning_rate=cosine_decay( learning_rate=learning_rate, step_each_epoch=step_each_epoch, epochs=epochs), momentum=0.9, regularization=fluid.regularizer.L2Decay(1e-4)) else: optimizer = fluid.optimizer.Momentum( learning_rate=learning_rate, momentum=0.9, regularization=fluid.regularizer.L2Decay(1e-4)) opts = optimizer.minimize(avg_cost) if args.with_mem_opt: fluid.memory_optimize(fluid.default_main_program()) place = fluid.CUDAPlace(0) exe = fluid.Executor(place) exe.run(fluid.default_startup_program()) if init_model is not None: fluid.io.load_persistables(exe, init_model) if pretrained_model: def if_exist(var): return os.path.exists(os.path.join(pretrained_model, var.name)) fluid.io.load_vars(exe, pretrained_model, predicate=if_exist) train_reader = paddle.batch(reader.train(), batch_size=batch_size) test_reader = paddle.batch(reader.test(), batch_size=batch_size) feeder = fluid.DataFeeder(place=place, feed_list=[image, label]) train_exe = fluid.ParallelExecutor(use_cuda=True, loss_name=avg_cost.name) test_exe = fluid.ParallelExecutor( use_cuda=True, main_program=test_program, share_vars_from=train_exe) fetch_list = [avg_cost.name, acc_top1.name, acc_top5.name] for pass_id in range(num_passes): train_info = [[], [], []] test_info = [[], [], []] for batch_id, data in enumerate(train_reader()): t1 = time.time() loss, acc1, acc5 = train_exe.run(fetch_list, feed=feeder.feed(data)) t2 = time.time() period = t2 - t1 loss = np.mean(np.array(loss)) acc1 = np.mean(np.array(acc1)) acc5 = np.mean(np.array(acc5)) train_info[0].append(loss) train_info[1].append(acc1) train_info[2].append(acc5) if batch_id % 10 == 0: print("Pass {0}, trainbatch {1}, loss {2}, \ acc1 {3}, acc5 {4} time {5}" .format(pass_id, \ batch_id, loss, acc1, acc5, \ "%2.2f sec" % period)) sys.stdout.flush() train_loss = np.array(train_info[0]).mean() train_acc1 = np.array(train_info[1]).mean() train_acc5 = np.array(train_info[2]).mean() for data in test_reader(): t1 = time.time() loss, acc1, acc5 = test_exe.run(fetch_list, feed=feeder.feed(data)) t2 = time.time() period = t2 - t1 loss = np.mean(np.array(loss)) acc1 = np.mean(np.array(acc1)) acc5 = np.mean(np.array(acc5)) test_info[0].append(loss) test_info[1].append(acc1) test_info[2].append(acc5) if batch_id % 10 == 0: print("Pass {0},testbatch {1},loss {2}, \ acc1 {3},acc5 {4},time {5}" .format(pass_id, \ batch_id, loss, acc1, acc5, \ "%2.2f sec" % period)) sys.stdout.flush() test_loss = np.array(test_info[0]).mean() test_acc1 = np.array(test_info[1]).mean() test_acc5 = np.array(test_info[2]).mean() print("End pass {0}, train_loss {1}, train_acc1 {2}, train_acc5 {3}, \ test_loss {4}, test_acc1 {5}, test_acc5 {6}" .format(pass_id, \ train_loss, train_acc1, train_acc5, test_loss, test_acc1, \ test_acc5)) sys.stdout.flush() model_path = os.path.join(model_save_dir + '/' + args.model, str(pass_id)) if not os.path.isdir(model_path): os.makedirs(model_path) fluid.io.save_persistables(exe, model_path) if __name__ == '__main__': args = parser.parse_args() print_arguments(args) total_images = 1281167 batch_size = args.batch_size step = int(total_images / batch_size + 1) num_epochs = 120 learning_rate_mode = args.lr_strategy lr_strategy = {} if learning_rate_mode == "piecewise_decay": epoch_points = [30, 60, 90] bd = [e * step for e in epoch_points] lr = [0.1, 0.01, 0.001, 0.0001] lr_strategy[learning_rate_mode] = {"bd": bd, "lr": lr} elif learning_rate_mode == "cosine_decay": lr_strategy[learning_rate_mode] = { "step_each_epoch": step, "epochs": num_epochs } else: lr_strategy = None use_nccl = True # layers: 50, 152 layers = args.num_layers method = train_parallel_exe if args.parallel_exe else train_parallel_do init_model = args.init_model if args.init_model else None pretrained_model = args.pretrained_model if args.pretrained_model else None method( args, learning_rate=0.1, batch_size=batch_size, num_passes=num_epochs, init_model=init_model, pretrained_model=pretrained_model, parallel=True, use_nccl=True, lr_strategy=lr_strategy, layers=layers)