本文整理汇总了Python中gc.set_threshold方法的典型用法代码示例。如果您正苦于以下问题：Python gc.set_threshold方法的具体用法？Python gc.set_threshold怎么用？Python gc.set_threshold使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类gc的用法示例。
在下文中一共展示了gc.set_threshold方法的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: check_gc_during_creation
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def check_gc_during_creation(self, makeref):
thresholds = gc.get_threshold()
gc.set_threshold(1, 1, 1)
gc.collect()
class A:
pass
def callback(*args):
pass
referenced = A()
a = A()
a.a = a
a.wr = makeref(referenced)
try:
# now make sure the object and the ref get labeled as
# cyclic trash:
a = A()
weakref.ref(referenced, callback)
finally:
gc.set_threshold(*thresholds) 示例2: test_len_race
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def test_len_race(self):
# Extended sanity checks for len() in the face of cyclic collection
self.addCleanup(gc.set_threshold, *gc.get_threshold())
for th in range(1, 100):
N = 20
gc.collect(0)
gc.set_threshold(th, th, th)
items = [RefCycle() for i in range(N)]
s = WeakSet(items)
del items
# All items will be collected at next garbage collection pass
it = iter(s)
try:
next(it)
except StopIteration:
pass
n1 = len(s)
del it
n2 = len(s)
self.assertGreaterEqual(n1, 0)
self.assertLessEqual(n1, N)
self.assertGreaterEqual(n2, 0)
self.assertLessEqual(n2, n1) 示例3: test_del_newclass
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def test_del_newclass(self):
# __del__ methods can trigger collection, make this to happen
thresholds = gc.get_threshold()
gc.enable()
gc.set_threshold(1)
class A(object):
def __del__(self):
dir(self)
a = A()
del a
gc.disable()
gc.set_threshold(*thresholds)
# The following two tests are fragile:
# They precisely count the number of allocations,
# which is highly implementation-dependent.
# For example:
# - disposed tuples are not freed, but reused
# - the call to assertEqual somehow avoids building its args tuple 示例4: check_len_race
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def check_len_race(self, dict_type, cons):
# Extended sanity checks for len() in the face of cyclic collection
self.addCleanup(gc.set_threshold, *gc.get_threshold())
for th in range(1, 100):
N = 20
gc.collect(0)
gc.set_threshold(th, th, th)
items = [RefCycle() for i in range(N)]
dct = dict_type(cons(o) for o in items)
del items
# All items will be collected at next garbage collection pass
it = dct.iteritems()
try:
next(it)
except StopIteration:
pass
n1 = len(dct)
del it
n2 = len(dct)
self.assertGreaterEqual(n1, 0)
self.assertLessEqual(n1, N)
self.assertGreaterEqual(n2, 0)
self.assertLessEqual(n2, n1) 示例5: test_del_newclass
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def test_del_newclass(self):
# __del__ methods can trigger collection, make this to happen
thresholds = gc.get_threshold()
gc.enable()
gc.set_threshold(1)
class A(object):
def __del__(self):
dir(self)
a = A()
del a
gc.disable()
gc.set_threshold(*thresholds)
# The following two tests are fragile:
# They precisely count the number of allocations,
# which is highly implementation-dependent.
# For example, disposed tuples are not freed, but reused.
# To minimize variations, though, we first store the get_count() results
# and check them at the end. 示例6: check_len_race
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def check_len_race(self, dict_type, cons):
# Extended sanity checks for len() in the face of cyclic collection
self.addCleanup(gc.set_threshold, *gc.get_threshold())
for th in range(1, 100):
N = 20
gc.collect(0)
gc.set_threshold(th, th, th)
items = [RefCycle() for i in range(N)]
dct = dict_type(cons(o) for o in items)
del items
# All items will be collected at next garbage collection pass
it = dct.items()
try:
next(it)
except StopIteration:
pass
n1 = len(dct)
del it
n2 = len(dct)
self.assertGreaterEqual(n1, 0)
self.assertLessEqual(n1, N)
self.assertGreaterEqual(n2, 0)
self.assertLessEqual(n2, n1) 示例7: test_threshold
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def test_threshold(self):
"""test 'gci threshold'."""
g1, g2, g3 = gc.get_threshold()
output = self.run_command("gci threshold", exitcode=0)
self.assertIn("G1: " + str(g1), output)
self.assertIn("G2: " + str(g2), output)
self.assertIn("G3: " + str(g3), output)
n1 = g1 + 1
n2 = g2 + 1
n3 = g3 + 1
output = self.run_command("gci threshold {} {} {}".format(n1, n2, n3), exitcode=0)
self.assertEqual(output.replace("\n", ""), "")
output = self.run_command("gci threshold", exitcode=0)
self.assertIn("G1: " + str(n1), output)
self.assertIn("G2: " + str(n2), output)
self.assertIn("G3: " + str(n3), output)
gc.set_threshold(g1, g2, g3)
output = self.run_command("gci threshold", exitcode=0)
self.assertIn("G1: " + str(g1), output)
self.assertIn("G2: " + str(g2), output)
self.assertIn("G3: " + str(g3), output) 示例8: test_free_from_gc
# 需要导入模块: import gc [as 别名]
# 或者: from gc import set_threshold [as 别名]
def test_free_from_gc(self):
# Check that freeing of blocks by the garbage collector doesn't deadlock
# (issue #12352).
# Make sure the GC is enabled, and set lower collection thresholds to
# make collections more frequent (and increase the probability of
# deadlock).
if not gc.isenabled():
gc.enable()
self.addCleanup(gc.disable)
thresholds = gc.get_threshold()
self.addCleanup(gc.set_threshold, *thresholds)
gc.set_threshold(10)
# perform numerous block allocations, with cyclic references to make
# sure objects are collected asynchronously by the gc
for i in range(5000):
a = multiprocessing.heap.BufferWrapper(1)
b = multiprocessing.heap.BufferWrapper(1)
# circular references
a.buddy = b
b.buddy = a
#
#
#