You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.1 KiB
46 lines
1.1 KiB
# stress test for the heap by allocating lots of objects within threads
|
|
# allocates about 5mb on the heap
|
|
#
|
|
# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
|
|
|
|
try:
|
|
import utime as time
|
|
except ImportError:
|
|
import time
|
|
import _thread
|
|
|
|
def last(l):
|
|
return l[-1]
|
|
|
|
def thread_entry(n):
|
|
# allocate a bytearray and fill it
|
|
data = bytearray(i for i in range(256))
|
|
|
|
# run a loop which allocates a small list and uses it each iteration
|
|
lst = 8 * [0]
|
|
sum = 0
|
|
for i in range(n):
|
|
sum += last(lst)
|
|
lst = [0, 0, 0, 0, 0, 0, 0, i + 1]
|
|
|
|
# check that the bytearray still has the right data
|
|
for i, b in enumerate(data):
|
|
assert i == b
|
|
|
|
# print the result of the loop and indicate we are finished
|
|
with lock:
|
|
print(sum, lst[-1])
|
|
global n_finished
|
|
n_finished += 1
|
|
|
|
lock = _thread.allocate_lock()
|
|
n_thread = 10
|
|
n_finished = 0
|
|
|
|
# spawn threads
|
|
for i in range(n_thread):
|
|
_thread.start_new_thread(thread_entry, (10000,))
|
|
|
|
# wait for threads to finish
|
|
while n_finished < n_thread:
|
|
time.sleep(1)
|
|
|