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test path reference
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Lines changed: 1 addition & 44 deletions
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import threading
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import unittest
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from concurrent.futures import ThreadPoolExecutor
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from threading import Barrier, Thread
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from unittest import TestCase
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import sys
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from test.support import import_helper, threading_helper, Py_GIL_DISABLED
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_testinternalcapi = import_helper.import_module("_testinternalcapi")
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NTHREADS = 6
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BOTTOM = 0
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TOP = 1000
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ITERS = 100
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class A:
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attr = 1
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@threading_helper.requires_working_threading()
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class TestType(TestCase):
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def test_attr_cache(self):
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def read(id0):
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for _ in range(ITERS):
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for _ in range(BOTTOM, TOP):
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A.attr
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def write(id0):
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for _ in range(ITERS):
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for _ in range(BOTTOM, TOP):
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# Make _PyType_Lookup cache hot first
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A.attr
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A.attr
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x = A.attr
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x += 1
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A.attr = x
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with ThreadPoolExecutor(NTHREADS) as pool:
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pool.submit(read, (1,))
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pool.submit(write, (1,))
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pool.shutdown(wait=True)
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@file:///tmp/to_push.py

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