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MarcCote/nstreams_bug.py

Created September 3, 2014 18:45
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Shows nstreams limitation on GPU
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nstreams_bug.py
import theano
import numpy as np
from theano.sandbox.rng_mrg import MRG_RandomStreams as RandomStreams
theano_rng = RandomStreams(42)
# This one works fine
print np.sum(theano_rng.uniform(size=(10000, 784), dtype=theano.config.floatX, nstreams=10000).eval(), 1)
# This one produces NaN at the end
print np.sum(theano_rng.uniform(size=(10000, 784), dtype=theano.config.floatX, nstreams=10000*400).eval(), 1)
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