8350854: Include thread counts in safepoint logging

[pengxiaolong]

Hi all,

This pull request contains a clean backport of commit 61d9ab97 from the openjdk/jdk repository.

The commit being backported was authored by Xiaolong Peng on 5 Mar 2025 and was reviewed by Aleksey Shipilev and David Holmes.

Thanks!

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8350854 needs maintainer approval

Issue

• JDK-8350854: Include thread counts in safepoint logging (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk24u.git pull/202/head:pull/202
$ git checkout pull/202

Update a local copy of the PR:
$ git checkout pull/202
$ git pull https://git.openjdk.org/jdk24u.git pull/202/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 202

View PR using the GUI difftool:
$ git pr show -t 202

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk24u/pull/202.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back xpeng! 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]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[openjdk]

⚠️ @pengxiaolong 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 (2985cf60)

[pengxiaolong]

/approval request Backport to JDK24 to include thread counts in safepoint logging, cleanly applied. Risk is low since the change is fairly simple. I have verified the new safepoint log to include threads count as expected, also run tier 1 and tier 2 test for the backport.

[openjdk]

@pengxiaolong
8350854: The approval request has been created successfully.

[bridgekeeper]

@pengxiaolong This pull request has been inactive for more than 4 weeks and will be automatically closed if another 4 weeks passes without any activity. To avoid this, simply issue a /touch or /keepalive command to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!