RFR: 8319980: [JVMCI] libgraal should reuse Thread instances as C2 does [v3]

[Tom Rodriguez]

On Wed, 29 Nov 2023 21:05:41 GMT, Tom Rodriguez <never at openjdk.org> wrote:

>> Reuse Threads instances for compiler threads in the same way C1/C2 do.  This has been in use for several months now.  mach5 testing is underway.
>
> Tom Rodriguez 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 four additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'origin/master' into tkr-reuse-java-thread
>  - Refactor thread creation
>  - Simplify logic
>  - 8319980: [JVMCI] libgraal should reuse Thread instances as C2 does

Testing is clean.  Thanks!

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PR Comment: https://git.openjdk.org/jdk/pull/16638#issuecomment-1833943714