[jdk17u-dev] RFR: 8283566: G1: Improve G1BarrierSet::enqueue performance [v3]

[Aleksey Shipilev]

> Clean (after #905) backport to improve G1 performance.
> 
> Additional testing:
>  - [x] Linux x86_64 fastdebug `tier1`
>  - [x] Linux x86_64 fastdebug `tier2`

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 one additional commit since the last revision:

  Backport 6ebf845ff7d758c99367488818427fcb7a5dbda9

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/906/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/906/files/02f6685c..8538bcba

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=906&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=906&range=01-02

  Stats: 51475 lines in 952 files changed: 40079 ins; 4771 del; 6625 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/906.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/906/head:pull/906

PR: https://git.openjdk.org/jdk17u-dev/pull/906