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gh-117783: Immortalize objects that use deferred reference counting (#118112)

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Deferred reference counting is not fully implemented yet. As a temporary
measure, we immortalize objects that would use deferred reference
counting to avoid multi-threaded scaling bottlenecks.

This is only performed in the free-threaded build once the first
non-main thread is started. Additionally, some tests, including refleak
tests, suppress this behavior.
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Sam Gross 2024-04-29 14:36:02 -04:00 • committed by GitHub
parent 8d4b756fd3
commit 7ccacb220d
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13 changed files with 134 additions and 8 deletions
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5
Lib/test/libregrtest/single.py
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@ -303,7 +303,10 @@ def run_single_test(test_name: TestName, runtests: RunTests) -> TestResult:
result = TestResult(test_name)
pgo = runtests.pgo
try:
_runtest(result, runtests)
# gh-117783: don't immortalize deferred objects when tracking
# refleaks. Only releveant for the free-threaded build.
with support.suppress_immortalization(runtests.hunt_refleak):
_runtest(result, runtests)
except:
if not pgo:
msg = traceback.format_exc()