8265836: OperatingSystemImpl.getCpuLoad() returns incorrect CPU load inside a container

[jerboaa]

JDK-8265836 applies to OpenJDK 11u as well. Patch applies clean. The only difference is in context. JDK head changed method getCpuLoad() while the JDK 11u backport changes getSystemCpuLoad() as that name hasn't been changed when the OperatingSystemMXBean has been made container aware in 11u.

Testing: Manual using the reproducer of the bug. See the backport bug for details.

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
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Issue

• JDK-8265836: OperatingSystemImpl.getCpuLoad() returns incorrect CPU load inside a container

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/20/head:pull/20
$ git checkout pull/20

Update a local copy of the PR:
$ git checkout pull/20
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/20/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 20

View PR using the GUI difftool:
$ git pr show -t 20

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/20.diff

[bridgekeeper]

👋 Welcome back sgehwolf! 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 backport pull request has now been updated with issue from the original commit.

[openjdk]

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

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

8265836: OperatingSystemImpl.getCpuLoad() returns incorrect CPU load inside a container

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

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[mlbridge]

Webrevs

• 00: Full (f030ae24)

[jerboaa]

/integrate

[openjdk]

Going to push as commit 37f36d5.
Since your change was applied there have been 3 commits pushed to the master branch:

• 9dc8826: 8254244: Some code emitted by TemplateTable::branch is unused when running TieredCompilation
• d31ceee: 8253048: AArch64: When CallLeaf, no need to preserve callee-saved registers in caller
• 941ad85: 8262392: Update Mesa 3-D Headers to version 21.0.3

Your commit was automatically rebased without conflicts.

[openjdk]

@jerboaa Pushed as commit 37f36d5.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.