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Add generator and worker seed #8602

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merged 6 commits into from
Jul 22, 2022
Merged

Add generator and worker seed #8602

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284eab6
Add generator and worker seed
UnglvKitDe Jul 16, 2022
a01894f
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Jul 16, 2022
3bd609b
Merge branch 'master' into new_feature/rseed_worker
glenn-jocher Jul 22, 2022
2660752
Update dataloaders.py
glenn-jocher Jul 22, 2022
5fc1067
Update dataloaders.py
glenn-jocher Jul 22, 2022
5992a7f
Update dataloaders.py
glenn-jocher Jul 22, 2022
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13 changes: 12 additions & 1 deletion utils/dataloaders.py
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,13 @@ def exif_transpose(image):
return image


def seed_worker(worker_id):
# Set dataloader worker seed https://pytorch.org/docs/stable/notes/randomness.html#dataloader
worker_seed = torch.initial_seed() % 2 ** 32
np.random.seed(worker_seed)
random.seed(worker_seed)


def create_dataloader(path,
imgsz,
batch_size,
Expand Down Expand Up @@ -130,13 +137,17 @@ def create_dataloader(path,
nw = min([os.cpu_count() // max(nd, 1), batch_size if batch_size > 1 else 0, workers]) # number of workers
sampler = None if rank == -1 else distributed.DistributedSampler(dataset, shuffle=shuffle)
loader = DataLoader if image_weights else InfiniteDataLoader # only DataLoader allows for attribute updates
generator = torch.Generator()
generator.manual_seed(0)
return loader(dataset,
batch_size=batch_size,
shuffle=shuffle and sampler is None,
num_workers=nw,
sampler=sampler,
pin_memory=True,
collate_fn=LoadImagesAndLabels.collate_fn4 if quad else LoadImagesAndLabels.collate_fn), dataset
collate_fn=LoadImagesAndLabels.collate_fn4 if quad else LoadImagesAndLabels.collate_fn,
worker_init_fn=seed_worker,
generator=generator), dataset


class InfiniteDataLoader(dataloader.DataLoader):
Expand Down