8324933: ConcurrentHashTable::statistics_calculate synchronization is expensive

[coffeys]

Clean backport to jdk22u. Already ported to jdk21u-oracle

hs-tier1, hs-tier2, hs-tier3 tests are green

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8324933 needs maintainer approval

Issue

• JDK-8324933: ConcurrentHashTable::statistics_calculate synchronization is expensive (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk22u.git pull/154/head:pull/154
$ git checkout pull/154

Update a local copy of the PR:
$ git checkout pull/154
$ git pull https://git.openjdk.org/jdk22u.git pull/154/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 154

View PR using the GUI difftool:
$ git pr show -t 154

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk22u/pull/154.diff

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[bridgekeeper]

👋 Welcome back coffeys! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@coffeys This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8324933: ConcurrentHashTable::statistics_calculate synchronization is expensive

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[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @coffeys This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (bcf43d18)

[coffeys]

/integrate

[openjdk]

Going to push as commit ccb1a3e.
Since your change was applied there has been 1 commit pushed to the master branch:

• ac9ca97: 8329528: G1 does not update TAMS correctly when dropping retained regions during Concurrent Start pause

Your commit was automatically rebased without conflicts.

[openjdk]

@coffeys Pushed as commit ccb1a3e.

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