# Copyright (c) 2021 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. """quant post with hyper params search""" import os import sys import math import time from time import gmtime, strftime import numpy as np import shutil import paddle import paddle.fluid as fluid import logging import argparse import functools import shutil import glob from scipy.stats import wasserstein_distance # smac from ConfigSpace.hyperparameters import CategoricalHyperparameter, \ UniformFloatHyperparameter, UniformIntegerHyperparameter from smac.configspace import ConfigurationSpace from smac.facade.smac_hpo_facade import SMAC4HPO from smac.scenario.scenario import Scenario from paddleslim.common import get_logger from paddleslim.quant import quant_post _logger = get_logger(__name__, level=logging.INFO) SMAC_TMP_FILE_PATTERN = "smac3-output_" def remove(path): """Remove files or directories matched by regex. Args: path(str): regular expressions to match the files and directories. """ for p in glob.glob(path): if os.path.isdir(p): shutil.rmtree(p) else: os.remove(p) class QuantConfig(object): """quant config""" def __init__(self, executor, place, float_infer_model_path, quantize_model_path, algo, hist_percent, bias_correct, batch_size, batch_num, train_sample_generator=None, eval_sample_generator=None, train_dataloader=None, eval_dataloader=None, eval_function=None, model_filename=None, params_filename=None, save_model_filename='__model__', save_params_filename='__params__', scope=None, quantizable_op_type=["conv2d", "depthwise_conv2d", "mul"], is_full_quantize=False, weight_bits=8, activation_bits=8, weight_quantize_type='channel_wise_abs_max', optimize_model=False, is_use_cache_file=False, cache_dir="./temp_post_training"): """QuantConfig init""" self.executor = executor self.place = place self.float_infer_model_path = float_infer_model_path self.quantize_model_path = quantize_model_path self.algo = algo, self.hist_percent = hist_percent, self.bias_correct = bias_correct, self.batch_size = batch_size, self.batch_num = batch_num, self.train_sample_generator = train_sample_generator self.eval_sample_generator = eval_sample_generator self.train_dataloader = train_dataloader self.eval_dataloader = eval_dataloader self.eval_function = eval_function self.model_filename = model_filename self.params_filename = params_filename self.save_model_filename = save_model_filename self.save_params_filename = save_params_filename self.scope = scope self.quantizable_op_type = quantizable_op_type self.is_full_quantize = is_full_quantize self.weight_bits = weight_bits self.activation_bits = activation_bits self.weight_quantize_type = weight_quantize_type self.optimize_model = optimize_model self.is_use_cache_file = is_use_cache_file self.cache_dir = cache_dir g_quant_config = None g_quant_model_cache_path = "quant_model_tmp" def emd_loss_init(): global g_min_emd_loss g_min_emd_loss = float('inf') emd_loss_init() def make_feed_dict(feed_target_names, data): """construct feed dictionary""" feed_dict = {} if len(feed_target_names) == 1: feed_dict[feed_target_names[0]] = data else: for i in range(len(feed_target_names)): feed_dict[feed_target_names[i]] = data[i] return feed_dict def standardization(data): """standardization numpy array""" mu = np.mean(data, axis=0) sigma = np.std(data, axis=0) if isinstance(sigma, list) or isinstance(sigma, np.ndarray): for idx, sig in enumerate(sigma): if sig == 0.: sigma[idx] = 1e-13 else: sigma = 1e-13 if sigma == 0. else sigma return (data - mu) / sigma def cal_emd_lose(out_float_list, out_quant_list, out_len): """caculate earch move distance""" emd_sum = 0 if out_len >= 3: for index in range(len(out_float_list)): emd_sum += wasserstein_distance(out_float_list[index], out_quant_list[index]) else: out_float = np.concatenate(out_float_list) out_quant = np.concatenate(out_quant_list) emd_sum += wasserstein_distance(out_float, out_quant) emd_sum /= float(len(out_float_list)) return emd_sum def have_invalid_num(np_arr): """check have invalid number in numpy array""" have_invalid_num = False for val in np_arr: if math.isnan(val) or math.isinf(val): have_invalid_num = True break return have_invalid_num def convert_model_out_2_nparr(model_out): """convert model output to numpy array""" if not isinstance(model_out, list): model_out = [model_out] out_list = [] for out in model_out: out_list.append(np.array(out)) out_nparr = np.concatenate(out_list) out_nparr = np.squeeze(out_nparr.flatten()) return out_nparr def eval_quant_model(): """Eval quant model accuracy. Post quantization does not change the parameter value. Therefore, the closer the output distribution of the quantization model and the float model, the better the accuracy is maintained, which has been verified in classification, detection, and nlp tasks. So the reward here is the earth mover distance between the output of the quantization model and the float model. This distance measurement method is also verified on various tasks, and the stability is better than other distance measurement methods such as mse. """ float_scope = paddle.static.Scope() quant_scope = paddle.static.Scope() with paddle.static.scope_guard(float_scope): [infer_prog_float, feed_target_names_float, fetch_targets_float] = \ fluid.io.load_inference_model(dirname=g_quant_config.float_infer_model_path, \ model_filename=g_quant_config.model_filename, \ params_filename=g_quant_config.params_filename, \ executor=g_quant_config.executor) with paddle.static.scope_guard(quant_scope): [infer_prog_quant, feed_target_names_quant, fetch_targets_quant] = \ fluid.io.load_inference_model(dirname=g_quant_model_cache_path, \ model_filename=g_quant_config.save_model_filename, \ params_filename=g_quant_config.save_params_filename, \ executor=g_quant_config.executor) out_float_list = [] out_quant_list = [] emd_sum = 0 out_len_sum = 0 valid_data_num = 0 max_eval_data_num = 200 if g_quant_config.eval_sample_generator is not None: feed_dict = False eval_dataloader = g_quant_config.eval_sample_generator else: feed_dict = True eval_dataloader = g_quant_config.eval_dataloader for i, data in enumerate(eval_dataloader()): with paddle.static.scope_guard(float_scope): out_float = g_quant_config.executor.run(infer_prog_float, \ fetch_list=fetch_targets_float, feed=data if feed_dict else make_feed_dict(feed_target_names_float, data)) with paddle.static.scope_guard(quant_scope): out_quant = g_quant_config.executor.run(infer_prog_quant, \ fetch_list=fetch_targets_quant, feed=data if feed_dict else make_feed_dict(feed_target_names_quant, data)) out_float = convert_model_out_2_nparr(out_float) out_quant = convert_model_out_2_nparr(out_quant) if len(out_float.shape) <= 0 or len(out_quant.shape) <= 0: continue min_len = min(out_float.shape[0], out_quant.shape[0]) out_float = out_float[:min_len] out_quant = out_quant[:min_len] out_len_sum += min_len if have_invalid_num(out_float) or have_invalid_num(out_quant): continue out_float_list.append(list(out_float)) out_quant_list.append(list(out_quant)) valid_data_num += 1 if valid_data_num >= max_eval_data_num: break out_float_list = standardization(out_float_list) out_quant_list = standardization(out_quant_list) emd_sum = cal_emd_lose(out_float_list, out_quant_list, out_len_sum / float(valid_data_num)) _logger.info("output diff: {}".format(emd_sum)) return float(emd_sum) def quantize(cfg): """model quantize job""" algo = cfg["algo"] if 'algo' in cfg else g_quant_config.algo[0][0] if g_quant_config.hist_percent[0] is None: g_quant_config.hist_percent = [g_quant_config.hist_percent] hist_percent = cfg[ "hist_percent"] if "hist_percent" in cfg else g_quant_config.hist_percent[ 0][0] bias_correct = cfg[ "bias_correct"] if "bias_correct" in cfg else g_quant_config.bias_correct[ 0][0] batch_size = cfg[ "batch_size"] if "batch_size" in cfg else g_quant_config.batch_size[0][ 0] batch_num = cfg[ "batch_num"] if "batch_num" in cfg else g_quant_config.batch_num[0][0] weight_quantize_type = cfg[ "weight_quantize_type"] if "weight_quantize_type" in cfg else g_quant_config.weight_quantize_type[ 0] quant_post( \ executor=g_quant_config.executor, \ scope=g_quant_config.scope, \ model_dir=g_quant_config.float_infer_model_path, \ quantize_model_path=g_quant_model_cache_path, \ sample_generator=g_quant_config.train_sample_generator, \ data_loader=g_quant_config.train_dataloader, model_filename=g_quant_config.model_filename, \ params_filename=g_quant_config.params_filename, \ save_model_filename=g_quant_config.save_model_filename, \ save_params_filename=g_quant_config.save_params_filename, \ quantizable_op_type=g_quant_config.quantizable_op_type, \ activation_quantize_type="moving_average_abs_max", \ weight_quantize_type=weight_quantize_type, \ algo=algo, \ hist_percent=hist_percent, \ bias_correction=bias_correct, \ batch_size=batch_size, \ batch_nums=batch_num) global g_min_emd_loss try: emd_loss = eval_quant_model() except: ### if eval_function is not None, use eval function provided by user. float_scope = paddle.static.Scope() quant_scope = paddle.static.Scope() with paddle.static.scope_guard(float_scope): [float_inference_program, feed_target_names, fetch_targets]= fluid.io.load_inference_model( \ dirname=g_quant_config.float_infer_model_path, \ model_filename=g_quant_config.model_filename, params_filename=g_quant_config.params_filename, executor=g_quant_config.executor) float_metric = g_quant_config.eval_function( g_quant_config.executor, float_inference_program, feed_target_names, fetch_targets) with paddle.static.scope_guard(quant_scope): [quant_inference_program, feed_target_names, fetch_targets] = fluid.io.load_inference_model( \ dirname=g_quant_model_cache_path, \ model_filename=g_quant_config.model_filename, params_filename=g_quant_config.params_filename, executor=g_quant_config.executor) quant_metric = g_quant_config.eval_function( g_quant_config.executor, quant_inference_program, feed_target_names, fetch_targets) emd_loss = float(abs(float_metric - quant_metric)) / float_metric _logger.info("emd loss: {}".format(emd_loss)) if emd_loss < g_min_emd_loss: g_min_emd_loss = emd_loss if os.path.exists(g_quant_config.quantize_model_path): shutil.rmtree(g_quant_config.quantize_model_path) os.system("cp -r {0} {1}".format(g_quant_model_cache_path, g_quant_config.quantize_model_path)) return emd_loss def quant_post_hpo( executor, place, model_dir, quantize_model_path, train_sample_generator=None, eval_sample_generator=None, train_dataloader=None, eval_dataloader=None, eval_function=None, model_filename=None, params_filename=None, save_model_filename='__model__', save_params_filename='__params__', scope=None, quantizable_op_type=["conv2d", "depthwise_conv2d", "mul"], is_full_quantize=False, weight_bits=8, activation_bits=8, weight_quantize_type=['channel_wise_abs_max'], algo=["KL", "hist", "avg", "mse"], bias_correct=[True, False], hist_percent=[0.98, 0.999], ### uniform sample in list. batch_size=[10, 30], ### uniform sample in list. batch_num=[10, 30], ### uniform sample in list. optimize_model=False, is_use_cache_file=False, cache_dir="./temp_post_training", runcount_limit=30): """ The function utilizes static post training quantization method to quantize the fp32 model. It uses calibrate data to calculate the scale factor of quantized variables, and inserts fake quantization and dequantization operators to obtain the quantized model. Args: executor(paddle.static.Executor): The executor to load, run and save the quantized model. place(paddle.CPUPlace or paddle.CUDAPlace): This parameter represents the executor run on which device. model_dir(str): The path of fp32 model that will be quantized, and the model and params that saved by ``paddle.static.io.save_inference_model`` are under the path. quantize_model_path(str): The path to save quantized model using api ``paddle.static.io.save_inference_model``. train_sample_generator(Python Generator): The sample generator provides calibrate data for DataLoader, and it only returns a sample every time. eval_sample_generator(Python Generator): The sample generator provides evalution data for DataLoader, and it only returns a sample every time. model_filename(str, optional): The name of model file. If parameters are saved in separate files, set it as 'None'. Default: 'None'. params_filename(str, optional): The name of params file. When all parameters are saved in a single file, set it as filename. If parameters are saved in separate files, set it as 'None'. Default : 'None'. save_model_filename(str): The name of model file to save the quantized inference program. Default: '__model__'. save_params_filename(str): The name of file to save all related parameters. If it is set None, parameters will be saved in separate files. Default: '__params__'. scope(paddle.static.Scope, optional): The scope to run program, use it to load and save variables. If scope is None, will use paddle.static.global_scope(). quantizable_op_type(list[str], optional): The list of op types that will be quantized. Default: ["conv2d", "depthwise_conv2d", "mul"]. is_full_quantize(bool): if True, apply quantization to all supported quantizable op type. If False, only apply quantization to the input quantizable_op_type. Default is False. weight_bits(int, optional): quantization bit number for weights. activation_bits(int): quantization bit number for activation. weight_quantize_type(str): quantization type for weights, support 'abs_max' and 'channel_wise_abs_max'. Compared to 'abs_max', the model accuracy is usually higher when using 'channel_wise_abs_max'. optimize_model(bool, optional): If set optimize_model as True, it applies some passes to optimize the model before quantization. So far, the place of executor must be cpu it supports fusing batch_norm into convs. is_use_cache_file(bool): This param is deprecated. cache_dir(str): This param is deprecated. runcount_limit(int): max. number of model quantization. Returns: None """ global g_quant_config g_quant_config = QuantConfig( executor, place, model_dir, quantize_model_path, algo, hist_percent, bias_correct, batch_size, batch_num, train_sample_generator, eval_sample_generator, train_dataloader, eval_dataloader, eval_function, model_filename, params_filename, save_model_filename, save_params_filename, scope, quantizable_op_type, is_full_quantize, weight_bits, activation_bits, weight_quantize_type, optimize_model, is_use_cache_file, cache_dir) cs = ConfigurationSpace() hyper_params = [] if 'hist' in algo: hist_percent = UniformFloatHyperparameter( "hist_percent", hist_percent[0], hist_percent[1], default_value=hist_percent[0]) hyper_params.append(hist_percent) if len(algo) > 1: algo = CategoricalHyperparameter("algo", algo, default_value=algo[0]) hyper_params.append(algo) else: algo = algo[0] if len(bias_correct) > 1: bias_correct = CategoricalHyperparameter( "bias_correct", bias_correct, default_value=bias_correct[0]) hyper_params.append(bias_correct) else: bias_correct = bias_correct[0] if len(weight_quantize_type) > 1: weight_quantize_type = CategoricalHyperparameter("weight_quantize_type", \ weight_quantize_type, default_value=weight_quantize_type[0]) hyper_params.append(weight_quantize_type) else: weight_quantize_type = weight_quantize_type[0] if len(batch_size) > 1: batch_size = UniformIntegerHyperparameter( "batch_size", batch_size[0], batch_size[1], default_value=batch_size[0]) hyper_params.append(batch_size) else: batch_size = batch_size[0] if len(batch_num) > 1: batch_num = UniformIntegerHyperparameter( "batch_num", batch_num[0], batch_num[1], default_value=batch_num[0]) hyper_params.append(batch_num) else: batch_num = batch_num[0] if len(hyper_params) == 0: quant_post( \ executor=g_quant_config.executor, \ scope=g_quant_config.scope, \ model_dir=g_quant_config.float_infer_model_path, \ quantize_model_path=g_quant_model_cache_path, \ sample_generator=g_quant_config.train_sample_generator, \ data_loader=g_quant_config.train_dataloader, model_filename=g_quant_config.model_filename, \ params_filename=g_quant_config.params_filename, \ save_model_filename=g_quant_config.save_model_filename, \ save_params_filename=g_quant_config.save_params_filename, \ quantizable_op_type=g_quant_config.quantizable_op_type, \ activation_quantize_type="moving_average_abs_max", \ weight_quantize_type=weight_quantize_type, \ algo=algo, \ hist_percent=hist_percent, \ bias_correction=bias_correct, \ batch_size=batch_size, \ batch_nums=batch_num) shutil.rmtree(g_quant_model_cache_path) return cs.add_hyperparameters(hyper_params) s_datetime = strftime("%Y-%m-%d-%H:%M:%S", gmtime()) smac_output_dir = SMAC_TMP_FILE_PATTERN + s_datetime scenario = Scenario({ "run_obj": "quality", # we optimize quality (alternative runtime) "runcount-limit": runcount_limit, # max. number of function evaluations; for this example set to a low number "cs": cs, # configuration space "deterministic": "True", "limit_resources": "False", "memory_limit": 4096, # adapt this to reasonable value for your hardware "output_dir": smac_output_dir # output_dir }) # To optimize, we pass the function to the SMAC-object smac = SMAC4HPO( scenario=scenario, rng=np.random.RandomState(42), tae_runner=quantize) # Example call of the function with default values # It returns: Status, Cost, Runtime, Additional Infos def_value = smac.get_tae_runner().run(cs.get_default_configuration(), 1)[1] _logger.info("Value for default configuration: %.8f" % def_value) # Start optimization try: incumbent = smac.optimize() finally: incumbent = smac.solver.incumbent inc_value = smac.get_tae_runner().run(incumbent, 1)[1] _logger.info("Optimized Value: %.8f" % inc_value) shutil.rmtree(g_quant_model_cache_path) remove(smac_output_dir) _logger.info("Quantization completed.")