RFR: 8290025: Remove the Sweeper [v11]

[Erik Österlund]

On Tue, 23 Aug 2022 20:46:49 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> I haven't reviewed the whole PR (there were already enough reviews), but I like the sweeper removal and what I've seen looks good. Impressive how strongly the sweeper is interwoven with the rest of hotspot! I'll be glad to see it go away.
> 
> Please note that there's a little more merging required after recent changes.
> 
> I'd like to rerun it in our nightly testing and discuss with Thomas. Heuristics fine tuning could still be done as follow-up, but we should try to avoid major drawbacks.

I fixed the merge conflict. Please let me know when you feel ready on your end.

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PR: https://git.openjdk.org/jdk/pull/9741