8274788: Support archived heap objects in ParallelGC

[calvinccheung]

With this change when the UseParallelGC is enabled, the CDS archived heap objects could be loaded
into the PSOldGen during VM bootstrap. This improves startup time since the module graph could be
loaded from the archive.

$ perf stat -r 40 -XX:+UseParallelGC -version

before: 0.069244290 seconds time elapsed            ( +-  0.49% )
after:    0.058555167 seconds time elapsed          ( +-  0.49% )

Passed CI tiers 1 - 4 tests.

Thanks @tschatzl for his help on GC changes.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8274788: Support archived heap objects in ParallelGC

Reviewers

• Ioi Lam (@iklam - Reviewer) ⚠️ Review applies to 350a130
• Albert Mingkun Yang (@albertnetymk - Reviewer) ⚠️ Review applies to 350a130
• Thomas Schatzl (@tschatzl - Reviewer) ⚠️ Review applies to 350a130

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/7655/head:pull/7655
$ git checkout pull/7655

Update a local copy of the PR:
$ git checkout pull/7655
$ git pull https://git.openjdk.java.net/jdk pull/7655/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 7655

View PR using the GUI difftool:
$ git pr show -t 7655

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/7655.diff

[calvinccheung]

/label add hotspot-runtime
/label add hotspot-gc

[bridgekeeper]

👋 Welcome back ccheung! 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]

@calvinccheung
The hotspot-runtime label was successfully added.

[openjdk]

@calvinccheung
The hotspot-gc label was successfully added.

[mlbridge]

Webrevs

• 01: Full - Incremental (658e6e79)
• 00: Full (350a1300)

[iklam]

The CDS and test changes look good to me.

[iklam]

Should be 2022

[openjdk]

@calvinccheung 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:

8274788: Support archived heap objects in ParallelGC

Reviewed-by: iklam, ayang, tschatzl

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 51 new commits pushed to the master branch:

• fc918a7: 8281234: The -protected option is not always checked in keytool and jarsigner
• d80f697: 8282523: Fix 'hierachy' typo
• f12200c: 8267796: vmTestbase/nsk/jvmti/scenarios/hotswap/HS201/hs201t002/TestDescription.java fails with NoClassDefFoundError
• 12a822a: 8282381: Parallel: Remove unnecessary PCReferenceProcessor
• ed3496e: 8282480: IGV: Use description instead of enum name for phases
• fc52a21: 8282143: Objects.requireNonNull should be ForceInline
• 732d891: 8282411: Add useful predicates to ElementKind
• eac8021: 8282320: Remove case conversion for debugging log in SSLCipher
• b86a8c0: 8282150: Drop redundant
  elements from tables in java.desktop HTML files
• 941e97c: 8281738: Create a regression test for checking the 'Space' key activation of focused Button
• ... and 41 more: https://git.openjdk.java.net/jdk/compare/b6843a162411b0fa32271592d8f3a6f241a54384...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.

[tschatzl]

Lgtm.

[calvinccheung]

Thanks Ioi, Albert, Thomas for the review.
/integrate

[openjdk]

Going to push as commit 234c17e.
Since your change was applied there have been 51 commits pushed to the master branch:

• fc918a7: 8281234: The -protected option is not always checked in keytool and jarsigner
• d80f697: 8282523: Fix 'hierachy' typo
• f12200c: 8267796: vmTestbase/nsk/jvmti/scenarios/hotswap/HS201/hs201t002/TestDescription.java fails with NoClassDefFoundError
• 12a822a: 8282381: Parallel: Remove unnecessary PCReferenceProcessor
• ed3496e: 8282480: IGV: Use description instead of enum name for phases
• fc52a21: 8282143: Objects.requireNonNull should be ForceInline
• 732d891: 8282411: Add useful predicates to ElementKind
• eac8021: 8282320: Remove case conversion for debugging log in SSLCipher
• b86a8c0: 8282150: Drop redundant
  elements from tables in java.desktop HTML files
• 941e97c: 8281738: Create a regression test for checking the 'Space' key activation of focused Button
• ... and 41 more: https://git.openjdk.java.net/jdk/compare/b6843a162411b0fa32271592d8f3a6f241a54384...master

Your commit was automatically rebased without conflicts.

[openjdk]

@calvinccheung Pushed as commit 234c17e.

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