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Seed NumPy using np.random.SeedSequence() in pl_worker_init_function() to robustly seed NumPy-dependent dataloader workers #20369

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Merged
merged 8 commits into from
Nov 25, 2024
Merged

Seed NumPy using np.random.SeedSequence() in pl_worker_init_function() to robustly seed NumPy-dependent dataloader workers #20369

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f47d15e
Update seed.py
amorehead Oct 28, 2024
38c29ee
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Oct 28, 2024
de1a493
Update seed.py
amorehead Oct 28, 2024
ef6ee61
Update seed.py
amorehead Oct 28, 2024
55c3451
Update seed.py
amorehead Oct 28, 2024
ee1f5e2
Merge branch 'master' into patch-3
Borda Nov 13, 2024
5ca6291
Merge branch 'master' into patch-3
amorehead Nov 15, 2024
b9ba94c
Merge branch 'master' into patch-3
lantiga Nov 19, 2024
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5 changes: 4 additions & 1 deletion src/lightning/fabric/utilities/seed.py
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Expand Up @@ -104,7 +104,10 @@ def pl_worker_init_function(worker_id: int, rank: Optional[int] = None) -> None:
if _NUMPY_AVAILABLE:
import numpy as np

np.random.seed(seed_sequence[3] & 0xFFFFFFFF) # numpy takes 32-bit seed only
ss = np.random.SeedSequence([base_seed, worker_id, global_rank])
np_rng_seed = ss.generate_state(4)

np.random.seed(np_rng_seed)


def _generate_seed_sequence(base_seed: int, worker_id: int, global_rank: int, count: int) -> List[int]:
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