forked from huawei/mindspore2022
383 lines
15 KiB
Python
383 lines
15 KiB
Python
# Copyright 2020 Huawei Technologies Co., Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ============================================================================
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"""Checkpoint related classes and functions."""
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import os
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import stat
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import time
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import threading
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import mindspore.context as context
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from mindspore import log as logger
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from mindspore._checkparam import Validator
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from mindspore.train._utils import _make_directory
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from mindspore.train.serialization import save_checkpoint, _save_graph
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from mindspore.parallel._ps_context import _is_role_pserver, _get_ps_mode_rank
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from ._callback import Callback, set_cur_net
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_cur_dir = os.getcwd()
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_save_dir = _cur_dir
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def _check_file_name_prefix(file_name_prefix):
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"""
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Check file name valid or not.
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File name can't include '/'. This file name naming convention only apply to Linux.
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"""
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if not isinstance(file_name_prefix, str) or file_name_prefix.find('/') >= 0:
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return False
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return True
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def _chg_ckpt_file_name_if_same_exist(directory, prefix):
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"""Check if there is a file with the same name."""
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files = os.listdir(directory)
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suffix_num = 0
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pre_len = len(prefix)
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for filename in files:
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name_ext = os.path.splitext(filename)
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if name_ext[-1] != ".ckpt":
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continue
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# find same prefix file
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if filename.find(prefix) == 0 and not filename[pre_len].isalpha():
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# add the max suffix + 1
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index = filename[pre_len:].find("-")
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if index == 0:
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suffix_num = max(suffix_num, 1)
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elif index != -1:
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num = filename[pre_len+1:pre_len+index]
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if num.isdigit():
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suffix_num = max(suffix_num, int(num)+1)
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if suffix_num != 0:
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prefix = prefix + "_" + str(suffix_num)
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return prefix
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class CheckpointConfig:
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"""
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The configuration of model checkpoint.
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Note:
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During the training process, if dataset is transmitted through the data channel,
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It is suggested to set 'save_checkpoint_steps' to an integer multiple of loop_size.
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Otherwise, the time to save the checkpoint may be biased.
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Args:
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save_checkpoint_steps (int): Steps to save checkpoint. Default: 1.
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save_checkpoint_seconds (int): Seconds to save checkpoint. Default: 0.
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Can't be used with save_checkpoint_steps at the same time.
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keep_checkpoint_max (int): Maximum number of checkpoint files can be saved. Default: 5.
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keep_checkpoint_per_n_minutes (int): Keep one checkpoint every n minutes. Default: 0.
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Can't be used with keep_checkpoint_max at the same time.
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integrated_save (bool): Whether to perform integrated save function in automatic model parallel scene.
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Default: True. Integrated save function is only supported in automatic parallel scene, not supported
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in manual parallel.
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async_save (bool): Whether asynchronous execution saves the checkpoint to a file. Default: False
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Raises:
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ValueError: If the input_param is None or 0.
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Examples:
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>>> config = CheckpointConfig()
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>>> ckpoint_cb = ModelCheckpoint(prefix="ck_prefix", directory='./', config=config)
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>>> model.train(10, dataset, callbacks=ckpoint_cb)
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"""
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def __init__(self,
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save_checkpoint_steps=1,
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save_checkpoint_seconds=0,
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keep_checkpoint_max=5,
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keep_checkpoint_per_n_minutes=0,
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integrated_save=True,
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async_save=False):
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if save_checkpoint_steps is not None:
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save_checkpoint_steps = Validator.check_non_negative_int(save_checkpoint_steps)
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if save_checkpoint_seconds is not None:
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save_checkpoint_seconds = Validator.check_non_negative_int(save_checkpoint_seconds)
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if keep_checkpoint_max is not None:
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keep_checkpoint_max = Validator.check_non_negative_int(keep_checkpoint_max)
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if keep_checkpoint_per_n_minutes is not None:
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keep_checkpoint_per_n_minutes = Validator.check_non_negative_int(keep_checkpoint_per_n_minutes)
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if not save_checkpoint_steps and not save_checkpoint_seconds and \
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not keep_checkpoint_max and not keep_checkpoint_per_n_minutes:
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raise ValueError("The input_param can't be all None or 0")
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self._save_checkpoint_steps = save_checkpoint_steps
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self._save_checkpoint_seconds = save_checkpoint_seconds
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if self._save_checkpoint_steps and self._save_checkpoint_steps > 0:
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self._save_checkpoint_seconds = None
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self._keep_checkpoint_max = keep_checkpoint_max
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self._keep_checkpoint_per_n_minutes = keep_checkpoint_per_n_minutes
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if self._keep_checkpoint_max and self._keep_checkpoint_max > 0:
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self._keep_checkpoint_per_n_minutes = None
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else:
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if not self._keep_checkpoint_per_n_minutes or self._keep_checkpoint_per_n_minutes == 0:
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self._keep_checkpoint_max = 1
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self._integrated_save = Validator.check_bool(integrated_save)
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self._async_save = Validator.check_bool(async_save)
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@property
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def save_checkpoint_steps(self):
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"""Get the value of _save_checkpoint_steps."""
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return self._save_checkpoint_steps
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@property
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def save_checkpoint_seconds(self):
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"""Get the value of _save_checkpoint_seconds."""
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return self._save_checkpoint_seconds
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@property
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def keep_checkpoint_max(self):
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"""Get the value of _keep_checkpoint_max."""
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return self._keep_checkpoint_max
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@property
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def keep_checkpoint_per_n_minutes(self):
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"""Get the value of _keep_checkpoint_per_n_minutes."""
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return self._keep_checkpoint_per_n_minutes
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@property
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def integrated_save(self):
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"""Get the value of _integrated_save."""
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return self._integrated_save
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@property
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def async_save(self):
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"""Get the value of _async_save."""
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return self._async_save
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def get_checkpoint_policy(self):
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"""Get the policy of checkpoint."""
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checkpoint_policy = {'save_checkpoint_steps': self._save_checkpoint_steps,
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'save_checkpoint_seconds': self._save_checkpoint_seconds,
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'keep_checkpoint_max': self._keep_checkpoint_max,
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'keep_checkpoint_per_n_minutes': self._keep_checkpoint_per_n_minutes}
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return checkpoint_policy
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class ModelCheckpoint(Callback):
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"""
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The checkpoint callback class.
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It is called to combine with train process and save the model and network parameters after traning.
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Args:
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prefix (str): The prefix name of checkpoint files. Default: "CKP".
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directory (str): The path of the folder which will be saved in the checkpoint file. Default: None.
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config (CheckpointConfig): Checkpoint strategy configuration. Default: None.
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Raises:
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ValueError: If the prefix is invalid.
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TypeError: If the config is not CheckpointConfig type.
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"""
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def __init__(self, prefix='CKP', directory=None, config=None):
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super(ModelCheckpoint, self).__init__()
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self._latest_ckpt_file_name = ""
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self._init_time = time.time()
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self._last_time = time.time()
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self._last_time_for_keep = time.time()
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self._last_triggered_step = 0
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if _check_file_name_prefix(prefix):
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self._prefix = prefix
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else:
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raise ValueError("Prefix {} for checkpoint file name invalid, "
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"please check and correct it and then continue.".format(prefix))
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if directory is not None:
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self._directory = _make_directory(directory)
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else:
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self._directory = _cur_dir
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if config is None:
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self._config = CheckpointConfig()
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else:
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if not isinstance(config, CheckpointConfig):
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raise TypeError("config should be CheckpointConfig type.")
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self._config = config
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# get existing checkpoint files
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self._manager = CheckpointManager()
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self._prefix = _chg_ckpt_file_name_if_same_exist(self._directory, self._prefix)
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self._graph_saved = False
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def step_end(self, run_context):
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"""
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Save the checkpoint at the end of step.
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Args:
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run_context (RunContext): Context of the train running.
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"""
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if _is_role_pserver():
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self._prefix = "PServer_" + str(_get_ps_mode_rank()) + "_" + self._prefix
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cb_params = run_context.original_args()
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# save graph (only once)
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if not self._graph_saved:
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graph_file_name = os.path.join(self._directory, self._prefix + '-graph.meta')
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_save_graph(cb_params.train_network, graph_file_name)
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self._graph_saved = True
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self._save_ckpt(cb_params)
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def end(self, run_context):
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"""
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Save the last checkpoint after training finished.
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Args:
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run_context (RunContext): Context of the train running.
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"""
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cb_params = run_context.original_args()
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_to_save_last_ckpt = True
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self._save_ckpt(cb_params, _to_save_last_ckpt)
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thread_list = threading.enumerate()
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if len(thread_list) > 1:
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for thread in thread_list:
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if thread.getName() == "asyn_save_ckpt":
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thread.join()
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from mindspore.parallel._cell_wrapper import destroy_allgather_cell
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destroy_allgather_cell()
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def _check_save_ckpt(self, cb_params, force_to_save):
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"""Check whether save checkpoint files or not."""
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if self._config.save_checkpoint_steps and self._config.save_checkpoint_steps > 0:
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if cb_params.cur_step_num >= self._last_triggered_step + self._config.save_checkpoint_steps \
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or force_to_save is True:
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return True
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elif self._config.save_checkpoint_seconds and self._config.save_checkpoint_seconds > 0:
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self._cur_time = time.time()
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if (self._cur_time - self._last_time) > self._config.save_checkpoint_seconds or force_to_save is True:
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self._last_time = self._cur_time
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return True
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return False
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def _save_ckpt(self, cb_params, force_to_save=False):
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"""Save checkpoint files."""
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if cb_params.cur_step_num == self._last_triggered_step:
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return
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save_ckpt = self._check_save_ckpt(cb_params, force_to_save)
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step_num_in_epoch = int((cb_params.cur_step_num - 1) % cb_params.batch_num + 1)
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if save_ckpt:
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cur_ckpoint_file = self._prefix + "-" + str(cb_params.cur_epoch_num) + "_" \
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+ str(step_num_in_epoch) + ".ckpt"
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# update checkpoint file list.
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self._manager.update_ckpoint_filelist(self._directory, self._prefix)
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# keep checkpoint files number equal max number.
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if self._config.keep_checkpoint_max and 0 < self._config.keep_checkpoint_max <= self._manager.ckpoint_num:
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self._manager.remove_oldest_ckpoint_file()
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elif self._config.keep_checkpoint_per_n_minutes and self._config.keep_checkpoint_per_n_minutes > 0:
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self._cur_time_for_keep = time.time()
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if (self._cur_time_for_keep - self._last_time_for_keep) \
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< self._config.keep_checkpoint_per_n_minutes * 60:
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self._manager.keep_one_ckpoint_per_minutes(self._config.keep_checkpoint_per_n_minutes,
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self._cur_time_for_keep)
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# generate the new checkpoint file and rename it.
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global _save_dir
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_save_dir = self._directory
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cur_file = os.path.join(self._directory, cur_ckpoint_file)
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self._last_time_for_keep = time.time()
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self._last_triggered_step = cb_params.cur_step_num
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if context.get_context("enable_ge"):
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set_cur_net(cb_params.train_network)
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cb_params.train_network.exec_checkpoint_graph()
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save_checkpoint(cb_params.train_network, cur_file, self._config.integrated_save,
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self._config.async_save)
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self._latest_ckpt_file_name = cur_file
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@property
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def latest_ckpt_file_name(self):
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"""Return the latest checkpoint path and file name."""
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return self._latest_ckpt_file_name
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class CheckpointManager:
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"""Manage checkpoint files according to train_config of checkpoint."""
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def __init__(self):
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self._ckpoint_filelist = []
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@property
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def ckpoint_filelist(self):
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"""Get all the related checkpoint files managed here."""
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return self._ckpoint_filelist
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@property
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def ckpoint_num(self):
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"""Get the number of the related checkpoint files managed here."""
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return len(self._ckpoint_filelist)
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def update_ckpoint_filelist(self, directory, prefix):
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"""Update the checkpoint file list."""
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self._ckpoint_filelist = []
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files = os.listdir(directory)
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for filename in files:
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if os.path.splitext(filename)[-1] == ".ckpt" and filename.startswith(prefix):
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mid_name = filename[len(prefix):-5]
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flag = True
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for char in mid_name:
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if char.isalpha():
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flag = False
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if flag:
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self._ckpoint_filelist.append(directory + '/' + filename)
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def remove_ckpoint_file(self, file_name):
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"""Remove the specified checkpoint file from this checkpoint manager and also from the directory."""
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try:
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os.chmod(file_name, stat.S_IWRITE)
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os.remove(file_name)
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self._ckpoint_filelist.remove(file_name)
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except OSError:
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logger.warning("OSError, failed to remove the older ckpt file %s.", file_name)
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except ValueError:
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logger.warning("ValueError, failed to remove the older ckpt file %s.", file_name)
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def remove_oldest_ckpoint_file(self):
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"""Remove the oldest checkpoint file from this checkpoint manager and also from the directory."""
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ckpoint_files = sorted(self._ckpoint_filelist, key=os.path.getmtime)
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self.remove_ckpoint_file(ckpoint_files[0])
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def keep_one_ckpoint_per_minutes(self, minutes, cur_time):
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"""Only keep the latest one ckpt file per minutes, remove other files generated in [last_time, cur_time]."""
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movs = []
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oldest_file = ''
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oldest_time = cur_time
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for ck_file in self._ckpoint_filelist:
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modify_time = os.path.getmtime(ck_file)
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if cur_time - modify_time < 60 * minutes:
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movs.append(ck_file)
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if modify_time < oldest_time:
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oldest_time = modify_time
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oldest_file = ck_file
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for mv_file in movs:
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if mv_file == oldest_file:
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continue
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self.remove_ckpoint_file(mv_file)
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