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gh-109592: test_eintr tolerates 20 ms when comparing timings (#110102)
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@ -25,6 +25,12 @@
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from test.support import os_helper
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from test.support import socket_helper
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# gh-109592: Tolerate a difference of 20 ms when comparing timings
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# (clock resolution)
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CLOCK_RES = 0.020
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@contextlib.contextmanager
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def kill_on_error(proc):
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"""Context manager killing the subprocess if a Python exception is raised."""
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@ -75,6 +81,9 @@ def subprocess(self, *args, **kw):
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cmd_args = (sys.executable, '-c') + args
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return subprocess.Popen(cmd_args, **kw)
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def check_elapsed_time(self, elapsed):
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self.assertGreaterEqual(elapsed, self.sleep_time - CLOCK_RES)
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@unittest.skipUnless(hasattr(signal, "setitimer"), "requires setitimer()")
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class OSEINTRTest(EINTRBaseTest):
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@ -373,7 +382,7 @@ def test_sleep(self):
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time.sleep(self.sleep_time)
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self.stop_alarm()
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dt = time.monotonic() - t0
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self.assertGreaterEqual(dt, self.sleep_time)
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self.check_elapsed_time(dt)
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@unittest.skipUnless(hasattr(signal, "setitimer"), "requires setitimer()")
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@ -435,7 +444,7 @@ def test_select(self):
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select.select([], [], [], self.sleep_time)
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dt = time.monotonic() - t0
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self.stop_alarm()
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self.assertGreaterEqual(dt, self.sleep_time)
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self.check_elapsed_time(dt)
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@unittest.skipIf(sys.platform == "darwin",
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"poll may fail on macOS; see issue #28087")
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@ -447,7 +456,7 @@ def test_poll(self):
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poller.poll(self.sleep_time * 1e3)
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dt = time.monotonic() - t0
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self.stop_alarm()
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self.assertGreaterEqual(dt, self.sleep_time)
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self.check_elapsed_time(dt)
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@unittest.skipUnless(hasattr(select, 'epoll'), 'need select.epoll')
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def test_epoll(self):
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@ -458,7 +467,7 @@ def test_epoll(self):
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poller.poll(self.sleep_time)
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dt = time.monotonic() - t0
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self.stop_alarm()
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self.assertGreaterEqual(dt, self.sleep_time)
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self.check_elapsed_time(dt)
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@unittest.skipUnless(hasattr(select, 'kqueue'), 'need select.kqueue')
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def test_kqueue(self):
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@ -469,7 +478,7 @@ def test_kqueue(self):
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kqueue.control(None, 1, self.sleep_time)
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dt = time.monotonic() - t0
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self.stop_alarm()
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self.assertGreaterEqual(dt, self.sleep_time)
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self.check_elapsed_time(dt)
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@unittest.skipUnless(hasattr(select, 'devpoll'), 'need select.devpoll')
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def test_devpoll(self):
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@ -480,7 +489,7 @@ def test_devpoll(self):
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poller.poll(self.sleep_time * 1e3)
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dt = time.monotonic() - t0
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self.stop_alarm()
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self.assertGreaterEqual(dt, self.sleep_time)
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self.check_elapsed_time(dt)
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class FNTLEINTRTest(EINTRBaseTest):
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@ -512,8 +521,8 @@ def _lock(self, lock_func, lock_name):
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# potential context switch delay
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lock_func(f, fcntl.LOCK_EX)
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dt = time.monotonic() - start_time
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self.assertGreaterEqual(dt, self.sleep_time)
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self.stop_alarm()
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self.check_elapsed_time(dt)
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proc.wait()
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# Issue 35633: See https://bugs.python.org/issue35633#msg333662
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