Integrated: 8325754: Dead AbstractQueuedSynchronizer$ConditionNodes survive minor garbage collections

Viktor Klang vklang at openjdk.org
Tue Feb 27 10:41:47 UTC 2024


On Wed, 21 Feb 2024 15:01:15 GMT, Viktor Klang <vklang at openjdk.org> wrote:

> More aggressively breaking chains in order to prevent nodes promoted to older generations standing in the way for collecting younger nodes. I decided that it was most efficient to add this logic to the else-branch of updating the firstWaiter and lastWaiter.
> 
> There's a race with unlinkCancelledWaiters() but according to @DougLea it should be a benign one.
> 
> There's a performance impact of this, but as it is a plain write, and one to null at that, it should be acceptable.

This pull request has now been integrated.

Changeset: 60cbf292
Author:    Viktor Klang <vklang at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/60cbf2925024b1c2253256688ae41741fff0a860
Stats:     10 lines in 2 files changed: 10 ins; 0 del; 0 mod

8325754: Dead AbstractQueuedSynchronizer$ConditionNodes survive minor garbage collections

Reviewed-by: alanb

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PR: https://git.openjdk.org/jdk/pull/17950


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