8030957: AIX: Implement OperatingSystemMXBean.getSystemCpuLoad() and .getProcessCpuLoad() on AIX

[suchismith1993]

Hi all,

This pull request contains a backport of commit d45e65ba from the openjdk/jdk repository.

The commit being backported was authored by Suchismith Roy on 8 Oct 2025 and was reviewed by Joachim Kern, Martin Doerr and Matthias Baesken.

Thanks!

---

Progress

• JDK-8030957 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8030957: AIX: Implement OperatingSystemMXBean.getSystemCpuLoad() and .getProcessCpuLoad() on AIX (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/2403/head:pull/2403
$ git checkout pull/2403

Update a local copy of the PR:
$ git checkout pull/2403
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/2403/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 2403

View PR using the GUI difftool:
$ git pr show -t 2403

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/2403.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back sroy! 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]

@suchismith1993 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:

8030957: AIX: Implement OperatingSystemMXBean.getSystemCpuLoad() and .getProcessCpuLoad() on AIX

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[openjdk]

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

[openjdk]

⚠️ @suchismith1993 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

• 01: Full - Incremental (df7145e3)
• 00: Full (e4a6895b)

[suchismith1993]

/approval request "This feature is needed for customer builds"

[openjdk]

@suchismith1993
8030957: The approval request has been created successfully.

[TheRealMDoerr]

Backport to jdk25u needs to be done before jdk21u-dev.

[GoeLin]

Can you please add a complete approval request text as described here? https://wiki.openjdk.org/display/JDKUpdates/How+to+contribute+or+backport+a+fix
I remove the label in the meantime. Thanks.

[suchismith1993]

/approval request Critical fix as customers are unable to fetch cpu usage for AIX.

[openjdk]

@suchismith1993
8030957: The approval request has been updated successfully.

[GoeLin]

Hi @suchismith1993 , please label again for approval once it is approved for 25. Also, please state risk and testing in your approval request.

[suchismith1993]

/approval request AIX CPU load support using libperfstat (needed for MXBean metrics); low risk, verified on AIX with jtreg and topas.

[openjdk]

@suchismith1993
8030957: The approval request has been updated successfully.

[bridgekeeper]

@suchismith1993 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!

[suchismith1993]

/approval request AIX CPU load support using libperfstat (needed for MXBean metrics); low risk, verified on AIX with jtreg and topas.

[openjdk]

@suchismith1993
8030957: The approval request was already up to date.

[suchismith1993]

Hi @GoeLin Changes made it to jdk25u. Can we get this integrated now ?

[GoeLin]

Hi, please merge head and await the GHA tests before pushing.
Thanks.