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Add automatic detection of number of CPU cores #530

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Add automatic detection of number of CPU cores #530

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3 changes: 2 additions & 1 deletion data/openwebtext/prepare.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
# saves the openwebtext dataset to a binary file for training. following was helpful:
# https://github.com/HazyResearch/flash-attention/blob/main/training/src/datamodules/language_modeling_hf.py

import multiprocessing
import os
from tqdm import tqdm
import numpy as np
Expand All @@ -9,7 +10,7 @@

# number of workers in .map() call
# good number to use is ~order number of cpu cores // 2
num_proc = 8
num_proc = multiprocessing.cpu_count() // 2

# number of workers in load_dataset() call
# best number might be different from num_proc above as it also depends on NW speed.
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