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

[Aleksey Shipilev]

On Thu, 21 Nov 2024 17:53:00 GMT, Brent Christian <bchristi at openjdk.org> wrote:

>> Yes. It maintains the root of a reachable linked list of `Target`-s.
>
> Doesn't it get covered by the local `prev` in `setup()`? Should that be removed?

No. Local `prev` variable goes out of scope when `setup()` finishes, making the whole thing eligible for GC. We need something that keeps the list alive, like a benchmark object field, which `CleanerGC.prev` is.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22043#discussion_r1852623921