[jdk21u-dev] RFR: 8318986: Improve GenericWaitBarrier performance [v4]

[Aleksey Shipilev]

On Mon, 25 Mar 2024 10:28:38 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Clean backport to drastically improve safepoint performance under heavy load, fixing regression between JDK 11 and JDK 17.
>> 
>> Additional testing:
>>  - [x] Ad-hoc performance runs, expected improvements
>>  - [x] MacOS AArch64 server fastdebug, `all` tests
>
> Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - Merge branch 'master' into JDK-8318986-generic-wait-barrier
>  - Merge branch 'master' into JDK-8318986-generic-wait-barrier
>  - Backport 30462f9da40d3a7ec18fcf46e2154fabb5fd4753

@GoeLin, @jerboaa -- would you mind approving it for 21u? We seem to be in agreement about this plan, see the JBS comments.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/70#issuecomment-2063725487