RFR: 8330849: Add test to verify memory usage with recursive locking

Roman Kennke rkennke at openjdk.org
Mon Apr 22 18:37:53 UTC 2024


Before recursive support has been added to lightweight locking, using recursive locking patterns would inflate lightweight locks to full monitors. In some scenarios (when churning lots of recursively locked objects), this could lead to excessive native memory usage. I'd like to add a test that verifies that this does not happen.

I verified that the new test fails reliably with an earlier commit that did not have LW recursive locking, yet, and passes with latest LW recursive locking.

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Commit messages:
 - 8330849: Add test to verify memory usage with recursive locking

Changes: https://git.openjdk.org/jdk/pull/18899/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18899&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330849
  Stats: 99 lines in 1 file changed: 99 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18899.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18899/head:pull/18899

PR: https://git.openjdk.org/jdk/pull/18899


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