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bpo-32025: Add time.thread_time() (#4410)

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* bpo-32025: Add time.thread_time()

* Add missing #endif

* Add NEWS blurb

* Add docs and whatsnew

* Address review comments

* Review comments
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Antoine Pitrou 2017-11-15 22:52:21 +01:00 • committed by GitHub
parent 762b9571c9
commit 4bd41c9b52
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57
Lib/test/test_time.py
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@ -47,6 +47,12 @@ ROUNDING_MODES = (
)
def busy_wait(duration):
deadline = time.monotonic() + duration
while time.monotonic() < deadline:
pass
class TimeTestCase(unittest.TestCase):
def setUp(self):
@ -81,6 +87,10 @@ class TimeTestCase(unittest.TestCase):
check_ns(time.process_time(),
time.process_time_ns())
if hasattr(time, 'thread_time'):
check_ns(time.thread_time(),
time.thread_time_ns())
if hasattr(time, 'clock_gettime'):
check_ns(time.clock_gettime(time.CLOCK_REALTIME),
time.clock_gettime_ns(time.CLOCK_REALTIME))
@ -486,10 +496,57 @@ class TimeTestCase(unittest.TestCase):
# on Windows
self.assertLess(stop - start, 0.020)
# process_time() should include CPU time spent in any thread
start = time.process_time()
busy_wait(0.100)
stop = time.process_time()
self.assertGreaterEqual(stop - start, 0.020) # machine busy?
t = threading.Thread(target=busy_wait, args=(0.100,))
start = time.process_time()
t.start()
t.join()
stop = time.process_time()
self.assertGreaterEqual(stop - start, 0.020) # machine busy?
info = time.get_clock_info('process_time')
self.assertTrue(info.monotonic)
self.assertFalse(info.adjustable)
def test_thread_time(self):
if not hasattr(time, 'thread_time'):
if sys.platform.startswith(('linux', 'win')):
self.fail("time.thread_time() should be available on %r"
% (sys.platform,))
else:
self.skipTest("need time.thread_time")
# thread_time() should not include time spend during a sleep
start = time.thread_time()
time.sleep(0.100)
stop = time.thread_time()
# use 20 ms because thread_time() has usually a resolution of 15 ms
# on Windows
self.assertLess(stop - start, 0.020)
# thread_time() should include CPU time spent in current thread...
start = time.thread_time()
busy_wait(0.100)
stop = time.thread_time()
self.assertGreaterEqual(stop - start, 0.020) # machine busy?
# ...but not in other threads
t = threading.Thread(target=busy_wait, args=(0.100,))
start = time.thread_time()
t.start()
t.join()
stop = time.thread_time()
self.assertLess(stop - start, 0.020)
info = time.get_clock_info('thread_time')
self.assertTrue(info.monotonic)
self.assertFalse(info.adjustable)
@unittest.skipUnless(hasattr(time, 'clock_settime'),
'need time.clock_settime')
def test_monotonic_settime(self):