8355003: Implement JEP 515: Ahead-of-Time Method Profiling

[veresov]

Improve warm-up time by making profile data from a previous run of an application instantly available, when the HotSpot Java Virtual Machine starts. Specifically, enhance the AOT cache to store method execution profiles from training runs, reducing profiling delays in subsequent production runs.

More details in the JEP: https://bugs.openjdk.org/browse/JDK-8325147

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Change requires CSR request JDK-8356012 to be approved
• Commit message must refer to an issue

Issues

• JDK-8355003: Implement JEP 515: Ahead-of-Time Method Profiling (Sub-task - P4)
• JDK-8356012: Implement JEP 515: Ahead-of-Time Method Profiling (CSR)

Reviewers

• Vladimir Kozlov (@vnkozlov - Reviewer)
• Magnus Ihse Bursie (@magicus - Reviewer) Review applies to 7fb7ae62
• Chris Plummer (@plummercj - Reviewer) Review applies to ae332887
• Ioi Lam (@iklam - Reviewer) Review applies to d3d51b00

Contributors

• John R Rose <[email protected]>
• Vladimir Ivanov <[email protected]>
• Ioi Lam <[email protected]>
• Vladimir Kozlov <[email protected]>
• Aleksey Shipilev <[email protected]>

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/24886/head:pull/24886
$ git checkout pull/24886

Update a local copy of the PR:
$ git checkout pull/24886
$ git pull https://git.openjdk.org/jdk.git pull/24886/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 24886

View PR using the GUI difftool:
$ git pr show -t 24886

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/24886.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back iveresov! 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]

@veresov 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:

8355003: Implement JEP 515: Ahead-of-Time Method Profiling

Co-authored-by: John R Rose <[email protected]>
Co-authored-by: Vladimir Ivanov <[email protected]>
Co-authored-by: Ioi Lam <[email protected]>
Co-authored-by: Vladimir Kozlov <[email protected]>
Co-authored-by: Aleksey Shipilev <[email protected]>
Reviewed-by: kvn, ihse, cjplummer, iklam

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 22 new commits pushed to the master branch:

• 1a65719: 8357911: JFR: Fix subtle xor method tagging bug
• 016cc4f: 8357830: JfrVframeStream::_cont_entry shadows super-class field
• 4b9290a: 8356647: C2: Excessively strict assert in PhaseIdealLoop::do_unroll
• ... and 19 more: https://git.openjdk.org/jdk/compare/2e8b195a96e3b2a4ca27c64a923adc4334073128...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[iklam]

updates are good!

[vnkozlov]

Re-approved

[veresov]

/integrate

[openjdk]

Going to push as commit e3f85c9.
Since your change was applied there have been 26 commits pushed to the master branch:

• 63d0e7f: 8355725: SPEC_FILTER stopped working
• a4f870d: 8357510: [REDO] RunTest variables should always be assigned
• 7bd8375: 8357920: Add .rej and .orig to .gitignore
• ... and 23 more: https://git.openjdk.org/jdk/compare/2e8b195a96e3b2a4ca27c64a923adc4334073128...master

Your commit was automatically rebased without conflicts.

[openjdk]

@veresov Pushed as commit e3f85c9.

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