RFR: 8318986: Improve GenericWaitBarrier performance [v5]

[Claes Redestad]

On Mon, 13 Nov 2023 19:00:43 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> > Ok, I'll submit some runs.
> 
> Thanks! Note that in current patch Linux implementation is switched for generic one to simplify functional testing. I expect Linux benchmarks to regress, as it is probably hard to win against futex implementation. For the actual change, we are interested in what Windows and MacOS benchmarks would show.

OK, I had already submitted a set across all platforms, but the results on linux will serve as a good check up on the generic vs futex impl. Do you intend to switch back before integration or is the intent to integrate and evaluate if it's on par then make a go/no-go decision later?

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PR Comment: https://git.openjdk.org/jdk/pull/16404#issuecomment-1808996691