Skip to content

mnist: avoid concurrent MNIST downloads under mp.spawn #1411

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
lordaarush wants to merge 1 commit into
base: main
Choose a base branch
from
Open

mnist: avoid concurrent MNIST downloads under mp.spawn #1411

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
25 changes: 23 additions & 2 deletions mnist/main.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -117,9 +117,9 @@ def main():
transforms.ToTensor(),
transforms.Normalize((0.1307,), (0.3081,))
])
dataset1 = datasets.MNIST('../data', train=True, download=True,
dataset1 = datasets.MNIST('../data', train=True, download=False,
transform=transform)
dataset2 = datasets.MNIST('../data', train=False,
dataset2 = datasets.MNIST('../data', train=False, download=False,
transform=transform)
train_loader = torch.utils.data.DataLoader(dataset1,**train_kwargs)
test_loader = torch.utils.data.DataLoader(dataset2, **test_kwargs)
Expand All @@ -138,4 +138,25 @@ def main():


if __name__ == '__main__':
from torchvision import datasets, transforms
import os

os.makedirs('../data', exist_ok=True)

# Download MNIST once in the main process to avoid
# concurrent downloads in mp.spawn workers
datasets.MNIST(
root='../data',
train=True,
download=True,
transform=transforms.ToTensor(),
)
datasets.MNIST(
root='../data',
train=False,
download=True,
transform=transforms.ToTensor(),
)

main()