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44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
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import unittest
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from test.support import threading_helper
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import cProfile
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import pstats
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NTHREADS = 10
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INSERT_PER_THREAD = 1000
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@threading_helper.requires_working_threading()
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class TestCProfile(unittest.TestCase):
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def test_cprofile_racing_list_insert(self):
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def list_insert(lst):
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for i in range(INSERT_PER_THREAD):
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lst.insert(0, i)
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lst = []
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with cProfile.Profile() as pr:
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threading_helper.run_concurrently(
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worker_func=list_insert, nthreads=NTHREADS, args=(lst,)
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)
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pr.create_stats()
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ps = pstats.Stats(pr)
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stats_profile = ps.get_stats_profile()
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list_insert_profile = stats_profile.func_profiles[
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"<method 'insert' of 'list' objects>"
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]
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# Even though there is no explicit recursive call to insert,
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# cProfile may record some calls as recursive due to limitations
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# in its handling of multithreaded programs. This issue is not
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# directly related to FT Python itself; however, it tends to be
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# more noticeable when using FT Python. Therefore, consider only
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# the calls section and disregard the recursive part.
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list_insert_ncalls = list_insert_profile.ncalls.split("/")[0]
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self.assertEqual(
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int(list_insert_ncalls), NTHREADS * INSERT_PER_THREAD
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)
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self.assertEqual(len(lst), NTHREADS * INSERT_PER_THREAD)
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