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load_spawn_weights only in proc rank 0 (#1385) 

Co-authored-by: Alexander Reshytko <areshytko@Alexanders-MacBook-Pro.local>
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areshytko 2020-04-06 17:17:16 +03:00 committed by GitHub
parent 4ed3027309
commit 9754c5da55
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1 changed files with 11 additions and 7 deletions
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18
pytorch_lightning/trainer/distrib_data_parallel.py
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@ -363,15 +363,19 @@ class TrainerDDPMixin(ABC):
:param model:
:return:
"""
# load weights saved in ddp
path = os.path.join(self.default_save_path, '__temp_weight_ddp_end.ckpt')
loaded_model = original_model.__class__.load_from_checkpoint(path)
# copy loaded weights to old model
original_model.load_state_dict(loaded_model.state_dict())
loaded_model = original_model
# remove ddp weights
os.remove(path)
if self.proc_rank == 0:
# load weights saved in ddp
path = os.path.join(self.default_save_path, '__temp_weight_ddp_end.ckpt')
loaded_model = original_model.__class__.load_from_checkpoint(path)
# copy loaded weights to old model
original_model.load_state_dict(loaded_model.state_dict())
# remove ddp weights
os.remove(path)
return loaded_model