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gh-88494: Reduce CLOCK_RES to 1 ms in tests #118395

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vstinner wants to merge 2 commits into from
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gh-88494: Reduce CLOCK_RES to 1 ms in tests #118395

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be949bb
gh-88494: Reduce CLOCK_RES to 1 ms in tests
vstinner Apr 29, 2024
eb4e7d3
Fix test_asyncio.test_windows_events
vstinner Apr 29, 2024
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4 changes: 2 additions & 2 deletions 4 Lib/test/_test_multiprocessing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -84,9 +84,9 @@
raise unittest.SkipTest("libasan has a pthread_create() dead lock related to thread+fork")


# gh-110666: Tolerate a difference of 100 ms when comparing timings
# gh-110666: Tolerate a difference of 1 ms when comparing timings
# (clock resolution)
CLOCK_RES = 0.100
CLOCK_RES = 0.001


def latin(s):
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6 changes: 5 additions & 1 deletion 6 Lib/test/test_asyncio/test_windows_events.py
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Expand Up @@ -177,6 +177,10 @@ def test_wait_for_handle(self):
event = _overlapped.CreateEvent(None, True, False, None)
self.addCleanup(_winapi.CloseHandle, event)

# RegisterWaitForSingleObject() has a resolution of 15.6 ms.
# Tolerate 50 ms difference when comparing timings.
CLOCK_RES = 0.050

# Wait for unset event with 0.5s timeout;
# result should be False at timeout
timeout = 0.5
Expand All @@ -187,7 +191,7 @@ def test_wait_for_handle(self):

self.assertEqual(done, False)
self.assertFalse(fut.result())
self.assertGreaterEqual(elapsed, timeout - test_utils.CLOCK_RES)
self.assertGreaterEqual(elapsed, timeout - CLOCK_RES)

_overlapped.SetEvent(event)

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6 changes: 2 additions & 4 deletions 6 Lib/test/test_asyncio/utils.py
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Expand Up @@ -36,10 +36,8 @@
from test.support import threading_helper


# Use the maximum known clock resolution (gh-75191, gh-110088): Windows
# GetTickCount64() has a resolution of 15.6 ms. Use 50 ms to tolerate rounding
# issues.
CLOCK_RES = 0.050
# Tolerate 1 ms difference when comparing timings.
CLOCK_RES = 0.001


def data_file(*filename):
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2 changes: 1 addition & 1 deletion 2 Lib/test/test_capi/test_time.py
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Expand Up @@ -9,7 +9,7 @@
SEC_TO_NS = 10 ** 9
DAY_TO_SEC = (24 * 60 * 60)
# Worst clock resolution: maximum delta between two clock reads.
CLOCK_RES = 0.050
CLOCK_RES = 0.001


class CAPITest(unittest.TestCase):
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