largemem.py

#!/usr/bin/env python

import sys
import array
import itertools
import random

def test(memsize):
	print "allocating"
	a = array.array('d')
	a.extend(itertools.repeat(0,memsize/8))
	print "starting iteration"
	iter = 1
	while 1:
		random.seed()
		state = random.getstate()
		for i in xrange(0,len(a)):
			a[i] = random.random()
		random.setstate(state)
		for i in xrange(0,len(a)):
			rand = random.random()
			if a[i] != rand:
				print "error %6i:%10i %g is not %g"%(iter, i, a[i], rand)
		print "finished iteration %i"%(iter)
		iter += 1
	
def main():
	test(int(sys.argv[1]))
	#test(1050000)

if __name__=='__main__':
	main()