RFR: 8343704: Bad GC parallelism with processing Cleaner queues [v14]

[Aleksey Shipilev]

On Thu, 21 Nov 2024 18:29:24 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Sorry for being dense, but where is a value being set to `CleanerGC.prev` ?
>
> Ah (facepalms), I see, I thought I assigned it! Damn. Let me fix and re-measure.

Redone the benchmark. We actually want all targets to be reachable, and only expose the Cleaner-side linked lists to the test. New performance data is updated here: https://github.com/openjdk/jdk/pull/22043#issuecomment-2470928360

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PR Review Comment: https://git.openjdk.org/jdk/pull/22043#discussion_r1852730179