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gh-112320: Implement on-trace confidence tracking for branches (#112321)

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We track the confidence as a scaled int.
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Guido van Rossum 2023-12-12 13:43:08 -08:00 • committed by GitHub
parent dfaa9e060b
commit 7316dfb0eb
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6 changed files with 56 additions and 3 deletions
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31
Lib/test/test_capi/test_misc.py
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@ -2985,6 +2985,37 @@ class TestUops(unittest.TestCase):
uops = {opname for opname, _, _ in ex}
self.assertIn("_FOR_ITER_TIER_TWO", uops)
def test_confidence_score(self):
def testfunc(n):
bits = 0
for i in range(n):
if i & 0x01:
bits += 1
if i & 0x02:
bits += 1
if i&0x04:
bits += 1
if i&0x08:
bits += 1
if i&0x10:
bits += 1
if i&0x20:
bits += 1
return bits
opt = _testinternalcapi.get_uop_optimizer()
with temporary_optimizer(opt):
x = testfunc(20)
self.assertEqual(x, 40)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
ops = [opname for opname, _, _ in ex]
count = ops.count("_GUARD_IS_TRUE_POP")
# Because Each 'if' halves the score, the second branch is
# too much already.
self.assertEqual(count, 1)
@unittest.skipUnless(support.Py_GIL_DISABLED, 'need Py_GIL_DISABLED')
class TestPyThreadId(unittest.TestCase):