diff options
Diffstat (limited to 'Lib/test/test_os.py')
| -rw-r--r-- | Lib/test/test_os.py | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py index 4bf1582..00b415f 100644 --- a/Lib/test/test_os.py +++ b/Lib/test/test_os.py @@ -13,6 +13,7 @@ import itertools import locale import os import pickle +import platform import select import selectors import shutil @@ -4085,9 +4086,15 @@ class EventfdTests(unittest.TestCase): @unittest.skipUnless(hasattr(os, 'timerfd_create'), 'requires os.timerfd_create') @support.requires_linux_version(2, 6, 30) class TimerfdTests(unittest.TestCase): - # Tolerate a difference of 1 ms - CLOCK_RES_NS = 1_000_000 - CLOCK_RES = CLOCK_RES_NS * 1e-9 + # 1 ms accuracy is reliably achievable on every platform except Android + # emulators, where we allow 10 ms (gh-108277). + if sys.platform == "android" and platform.android_ver().is_emulator: + CLOCK_RES_PLACES = 2 + else: + CLOCK_RES_PLACES = 3 + + CLOCK_RES = 10 ** -CLOCK_RES_PLACES + CLOCK_RES_NS = 10 ** (9 - CLOCK_RES_PLACES) def timerfd_create(self, *args, **kwargs): fd = os.timerfd_create(*args, **kwargs) @@ -4109,18 +4116,18 @@ class TimerfdTests(unittest.TestCase): # 1st call next_expiration, interval2 = os.timerfd_settime(fd, initial=initial_expiration, interval=interval) - self.assertAlmostEqual(interval2, 0.0, places=3) - self.assertAlmostEqual(next_expiration, 0.0, places=3) + self.assertAlmostEqual(interval2, 0.0, places=self.CLOCK_RES_PLACES) + self.assertAlmostEqual(next_expiration, 0.0, places=self.CLOCK_RES_PLACES) # 2nd call next_expiration, interval2 = os.timerfd_settime(fd, initial=initial_expiration, interval=interval) - self.assertAlmostEqual(interval2, interval, places=3) - self.assertAlmostEqual(next_expiration, initial_expiration, places=3) + self.assertAlmostEqual(interval2, interval, places=self.CLOCK_RES_PLACES) + self.assertAlmostEqual(next_expiration, initial_expiration, places=self.CLOCK_RES_PLACES) # timerfd_gettime next_expiration, interval2 = os.timerfd_gettime(fd) - self.assertAlmostEqual(interval2, interval, places=3) - self.assertAlmostEqual(next_expiration, initial_expiration, places=3) + self.assertAlmostEqual(interval2, interval, places=self.CLOCK_RES_PLACES) + self.assertAlmostEqual(next_expiration, initial_expiration, places=self.CLOCK_RES_PLACES) def test_timerfd_non_blocking(self): fd = self.timerfd_create(time.CLOCK_REALTIME, flags=os.TFD_NONBLOCK) @@ -4174,8 +4181,8 @@ class TimerfdTests(unittest.TestCase): # timerfd_gettime next_expiration, interval2 = os.timerfd_gettime(fd) - self.assertAlmostEqual(interval2, interval, places=3) - self.assertAlmostEqual(next_expiration, initial_expiration, places=3) + self.assertAlmostEqual(interval2, interval, places=self.CLOCK_RES_PLACES) + self.assertAlmostEqual(next_expiration, initial_expiration, places=self.CLOCK_RES_PLACES) count = 3 t = time.perf_counter() @@ -4206,8 +4213,8 @@ class TimerfdTests(unittest.TestCase): # timerfd_gettime # Note: timerfd_gettime returns relative values even if TFD_TIMER_ABSTIME is specified. next_expiration, interval2 = os.timerfd_gettime(fd) - self.assertAlmostEqual(interval2, interval, places=3) - self.assertAlmostEqual(next_expiration, offset, places=3) + self.assertAlmostEqual(interval2, interval, places=self.CLOCK_RES_PLACES) + self.assertAlmostEqual(next_expiration, offset, places=self.CLOCK_RES_PLACES) t = time.perf_counter() count_signaled = self.read_count_signaled(fd) |