def get_bytes_bitmap(length, samples):
elements = 256
bitmap = [0 for _ in range(elements)]
for _ in range(samples):
array = rand.bytes(length)
for byte in array:
bitmap[byte] += 1
return bitmap
def handle_busy(self):
busy_timeout = 1
kickstart = False
if kickstart: # spend busy cycle by feeding random strings?
log_slave("No ready work items, attempting random..", self.slave_id)
start_time = time.time()
while (time.time() - start_time) < busy_timeout:
meta_data = {"state": {"name": "import"}, "id": 0}
payload = rand.bytes(rand.int(32))
self.logic.process_node(payload, meta_data)
else:
log_slave("No ready work items, waiting...", self.slave_id)
time.sleep(busy_timeout)
self.conn.send_ready()
def test_rand_bytes():
lengths = [1, 3, 32, 17, 64]
for length in lengths:
bitmap = get_bytes_bitmap(length, 1)
total = 0
for count in bitmap:
total += count
assert(total == length), "rand.bytes() returned unexpected length"
# similar to shuffled gauss count we can expect a random 256 byte array to include each value about once..
length=256
samples = 100
byte_array = rand.bytes(length)
_, real = get_gauss_sum(byte_array, samples)
n = 255
expect = n/2*(n+1)
assert(abs(real/samples / expect) < 0.1), "rand.bytes() bias detected, gauss count: %d != %d" % (real/samples,expect)