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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.
This commit is contained in:
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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8
Lib/test/libregrtest/main.py
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@ -7,7 +7,8 @@
import time
import trace
from test.support import os_helper, MS_WINDOWS, flush_std_streams
from test.support import (os_helper, MS_WINDOWS, flush_std_streams,
suppress_immortalization)
from .cmdline import _parse_args, Namespace
from .findtests import findtests, split_test_packages, list_cases
@ -526,7 +527,10 @@ def _run_tests(self, selected: TestTuple, tests: TestList | None) -> int:
if self.num_workers:
self._run_tests_mp(runtests, self.num_workers)
else:
self.run_tests_sequentially(runtests)
# gh-117783: don't immortalize deferred objects when tracking
# refleaks. Only releveant for the free-threaded build.
with suppress_immortalization(runtests.hunt_refleak):
self.run_tests_sequentially(runtests)
coverage = self.results.get_coverage_results()
self.display_result(runtests)