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Merge pull request #753 from Jackwaterveg/ds2_online

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模型Resume的学习率问题
pull/754/head v2.1.1
Hui Zhang 3 years ago committed by GitHub
parent 38d95784e2 31a313b69e
commit 0309c36a3d
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2 changed files with 36 additions and 41 deletions
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4
deepspeech/exps/deepspeech2/model.py
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@ -123,10 +123,6 @@ class DeepSpeech2Trainer(Trainer):
def setup_model(self):
config = self.config.clone()
config.defrost()
assert (self.train_loader.collate_fn.feature_size ==
self.test_loader.collate_fn.feature_size)
assert (self.train_loader.collate_fn.vocab_size ==
self.test_loader.collate_fn.vocab_size)
config.model.feat_size = self.train_loader.collate_fn.feature_size
config.model.dict_size = self.train_loader.collate_fn.vocab_size
config.freeze()

73
deepspeech/training/trainer.py
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@ -29,37 +29,37 @@ logger = Log(__name__).getlog()
class Trainer():
"""
An experiment template in order to structure the training code and take
care of saving, loading, logging, visualization stuffs. It's intended to
be flexible and simple.
So it only handles output directory (create directory for the output,
create a checkpoint directory, dump the config in use and create
An experiment template in order to structure the training code and take
care of saving, loading, logging, visualization stuffs. It's intended to
be flexible and simple.
So it only handles output directory (create directory for the output,
create a checkpoint directory, dump the config in use and create
visualizer and logger) in a standard way without enforcing any
input-output protocols to the model and dataloader. It leaves the main
part for the user to implement their own (setup the model, criterion,
optimizer, define a training step, define a validation function and
input-output protocols to the model and dataloader. It leaves the main
part for the user to implement their own (setup the model, criterion,
optimizer, define a training step, define a validation function and
customize all the text and visual logs).
It does not save too much boilerplate code. The users still have to write
the forward/backward/update mannually, but they are free to add
It does not save too much boilerplate code. The users still have to write
the forward/backward/update mannually, but they are free to add
non-standard behaviors if needed.
We have some conventions to follow.
1. Experiment should have ``model``, ``optimizer``, ``train_loader`` and
1. Experiment should have ``model``, ``optimizer``, ``train_loader`` and
``valid_loader``, ``config`` and ``args`` attributes.
2. The config should have a ``training`` field, which has
``valid_interval``, ``save_interval`` and ``max_iteration`` keys. It is
used as the trigger to invoke validation, checkpointing and stop of the
2. The config should have a ``training`` field, which has
``valid_interval``, ``save_interval`` and ``max_iteration`` keys. It is
used as the trigger to invoke validation, checkpointing and stop of the
experiment.
3. There are four methods, namely ``train_batch``, ``valid``,
3. There are four methods, namely ``train_batch``, ``valid``,
``setup_model`` and ``setup_dataloader`` that should be implemented.
Feel free to add/overwrite other methods and standalone functions if you
Feel free to add/overwrite other methods and standalone functions if you
need.
Parameters
----------
config: yacs.config.CfgNode
The configuration used for the experiment.
args: argparse.Namespace
The parsed command line arguments.
Examples
@ -68,16 +68,16 @@ class Trainer():
>>> exp = Trainer(config, args)
>>> exp.setup()
>>> exp.run()
>>>
>>>
>>> config = get_cfg_defaults()
>>> parser = default_argument_parser()
>>> args = parser.parse_args()
>>> if args.config:
>>> if args.config:
>>> config.merge_from_file(args.config)
>>> if args.opts:
>>> config.merge_from_list(args.opts)
>>> config.freeze()
>>>
>>>
>>> if args.nprocs > 1 and args.device == "gpu":
>>> dist.spawn(main_sp, args=(config, args), nprocs=args.nprocs)
>>> else:
@ -114,7 +114,7 @@ class Trainer():
@property
def parallel(self):
"""A flag indicating whether the experiment should run with
"""A flag indicating whether the experiment should run with
multiprocessing.
"""
return self.args.device == "gpu" and self.args.nprocs > 1
@ -144,9 +144,9 @@ class Trainer():
self.optimizer, infos)
def resume_or_scratch(self):
"""Resume from latest checkpoint at checkpoints in the output
"""Resume from latest checkpoint at checkpoints in the output
directory or load a specified checkpoint.
If ``args.checkpoint_path`` is not None, load the checkpoint, else
resume training.
"""
@ -181,8 +181,7 @@ class Trainer():
if from_scratch:
# save init model, i.e. 0 epoch
self.save(tag='init', infos=None)
self.lr_scheduler.step(self.iteration)
self.lr_scheduler.step(self.epoch)
if self.parallel:
self.train_loader.batch_sampler.set_epoch(self.epoch)
@ -254,7 +253,7 @@ class Trainer():
def setup_checkpointer(self):
"""Create a directory used to save checkpoints into.
It is "checkpoints" inside the output directory.
"""
# checkpoint dir
@ -277,13 +276,13 @@ class Trainer():
@mp_tools.rank_zero_only
def setup_visualizer(self):
"""Initialize a visualizer to log the experiment.
The visual log is saved in the output directory.
Notes
------
Only the main process has a visualizer with it. Use multiple
visualizers in multiprocess to write to a same log file may cause
Only the main process has a visualizer with it. Use multiple
visualizers in multiprocess to write to a same log file may cause
unexpected behaviors.
"""
# visualizer
@ -292,9 +291,9 @@ class Trainer():
@mp_tools.rank_zero_only
def dump_config(self):
"""Save the configuration used for this experiment.
It is saved in to ``config.yaml`` in the output directory at the
"""Save the configuration used for this experiment.
It is saved in to ``config.yaml`` in the output directory at the
beginning of the experiment.
"""
with open(self.output_dir / "config.yaml", 'wt') as f:
@ -312,13 +311,13 @@ class Trainer():
raise NotImplementedError("valid should be implemented.")
def setup_model(self):
"""Setup model, criterion and optimizer, etc. A subclass should
"""Setup model, criterion and optimizer, etc. A subclass should
implement this method.
"""
raise NotImplementedError("setup_model should be implemented.")
def setup_dataloader(self):
"""Setup training dataloader and validation dataloader. A subclass
"""Setup training dataloader and validation dataloader. A subclass
should implement this method.
"""
raise NotImplementedError("setup_dataloader should be implemented.")

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