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Misleading exception raised during batch scaling #2223

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merged 3 commits into from
Jul 29, 2020
Merged

Misleading exception raised during batch scaling #2223

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Misleading exception raised during batch scaling
tejasvi May 27, 2020
179f6a5
Improvements considering #1896
tejasvi May 28, 2020
3d79243
Apply suggestions from code review
tejasvi Jun 8, 2020
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17 changes: 13 additions & 4 deletions pytorch_lightning/trainer/training_tricks.py
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Original file line number Diff line number Diff line change
Expand Up @@ -136,7 +136,10 @@ def scale_batch_size(self,

"""
if not hasattr(model, batch_arg_name):
raise MisconfigurationException(f'Field {batch_arg_name} not found in `model.hparams`')
if not hasattr(model.hparams, batch_arg_name):
raise MisconfigurationException(
'Neither of `model.batch_size` and `model.hparams.batch_size` found.'
)

if hasattr(model.train_dataloader, 'patch_loader_code'):
raise MisconfigurationException('The batch scaling feature cannot be used with dataloaders'
Expand Down Expand Up @@ -242,17 +245,23 @@ def _adjust_batch_size(trainer,

"""
model = trainer.get_model()
batch_size = getattr(model, batch_arg_name)
if hasattr(model, batch_arg_name):
batch_size = getattr(model, batch_arg_name)
else:
batch_size = getattr(model.hparams, batch_arg_name)
if value:
setattr(model, batch_arg_name, value)
if hasattr(model, batch_arg_name):
setattr(model, batch_arg_name, value)
else:
setattr(model.hparams, batch_arg_name, value)
new_size = value
if desc:
log.info(f'Batch size {batch_size} {desc}, trying batch size {new_size}')
else:
new_size = int(batch_size * factor)
if desc:
log.info(f'Batch size {batch_size} {desc}, trying batch size {new_size}')
setattr(model, batch_arg_name, new_size)
setattr(model.hparams, batch_arg_name, new_size)
return new_size


Expand Down