diff options
| -rw-r--r-- | Lib/test/_test_eintr.py | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/Lib/test/_test_eintr.py b/Lib/test/_test_eintr.py index 006581f..15586f1 100644 --- a/Lib/test/_test_eintr.py +++ b/Lib/test/_test_eintr.py @@ -25,6 +25,12 @@ from test import support from test.support import os_helper from test.support import socket_helper + +# gh-109592: Tolerate a difference of 20 ms when comparing timings +# (clock resolution) +CLOCK_RES = 0.020 + + @contextlib.contextmanager def kill_on_error(proc): """Context manager killing the subprocess if a Python exception is raised.""" @@ -75,6 +81,9 @@ class EINTRBaseTest(unittest.TestCase): cmd_args = (sys.executable, '-c') + args return subprocess.Popen(cmd_args, **kw) + def check_elapsed_time(self, elapsed): + self.assertGreaterEqual(elapsed, self.sleep_time - CLOCK_RES) + @unittest.skipUnless(hasattr(signal, "setitimer"), "requires setitimer()") class OSEINTRTest(EINTRBaseTest): @@ -373,7 +382,7 @@ class TimeEINTRTest(EINTRBaseTest): time.sleep(self.sleep_time) self.stop_alarm() dt = time.monotonic() - t0 - self.assertGreaterEqual(dt, self.sleep_time) + self.check_elapsed_time(dt) @unittest.skipUnless(hasattr(signal, "setitimer"), "requires setitimer()") @@ -435,7 +444,7 @@ class SelectEINTRTest(EINTRBaseTest): select.select([], [], [], self.sleep_time) dt = time.monotonic() - t0 self.stop_alarm() - self.assertGreaterEqual(dt, self.sleep_time) + self.check_elapsed_time(dt) @unittest.skipIf(sys.platform == "darwin", "poll may fail on macOS; see issue #28087") @@ -447,7 +456,7 @@ class SelectEINTRTest(EINTRBaseTest): poller.poll(self.sleep_time * 1e3) dt = time.monotonic() - t0 self.stop_alarm() - self.assertGreaterEqual(dt, self.sleep_time) + self.check_elapsed_time(dt) @unittest.skipUnless(hasattr(select, 'epoll'), 'need select.epoll') def test_epoll(self): @@ -458,7 +467,7 @@ class SelectEINTRTest(EINTRBaseTest): poller.poll(self.sleep_time) dt = time.monotonic() - t0 self.stop_alarm() - self.assertGreaterEqual(dt, self.sleep_time) + self.check_elapsed_time(dt) @unittest.skipUnless(hasattr(select, 'kqueue'), 'need select.kqueue') def test_kqueue(self): @@ -469,7 +478,7 @@ class SelectEINTRTest(EINTRBaseTest): kqueue.control(None, 1, self.sleep_time) dt = time.monotonic() - t0 self.stop_alarm() - self.assertGreaterEqual(dt, self.sleep_time) + self.check_elapsed_time(dt) @unittest.skipUnless(hasattr(select, 'devpoll'), 'need select.devpoll') def test_devpoll(self): @@ -480,7 +489,7 @@ class SelectEINTRTest(EINTRBaseTest): poller.poll(self.sleep_time * 1e3) dt = time.monotonic() - t0 self.stop_alarm() - self.assertGreaterEqual(dt, self.sleep_time) + self.check_elapsed_time(dt) class FNTLEINTRTest(EINTRBaseTest): @@ -512,8 +521,8 @@ class FNTLEINTRTest(EINTRBaseTest): # potential context switch delay lock_func(f, fcntl.LOCK_EX) dt = time.monotonic() - start_time - self.assertGreaterEqual(dt, self.sleep_time) self.stop_alarm() + self.check_elapsed_time(dt) proc.wait() # Issue 35633: See https://bugs.python.org/issue35633#msg333662 |