8291912: Introduce per-allocation target struct for members in G1PLABAllocator

[tschatzl]

trafficstars

Hi all,

can I get reviews for this change that refactors the many per-destination arrays in PLABAllocator into an array of struct as I promised in the review for JDK-8288966/PR#9726? I think that makes the code easier to follow since there is less clutter.

Testing: tier1-5, no performance differences

Thanks, Thomas

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Progress

• [ ] Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue

Integration blocker

 ⚠️ Dependency #9726 must be integrated first

Issue

• JDK-8291912: Introduce per-allocation target struct for members in G1PLABAllocator

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk pull/9818/head:pull/9818
$ git checkout pull/9818

Update a local copy of the PR:
$ git checkout pull/9818
$ git pull https://git.openjdk.org/jdk pull/9818/head

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$ git pr checkout 9818

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Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/9818.diff

[bridgekeeper[bot]]

:wave: Welcome back tschatzl! A progress list of the required criteria for merging this PR into pr/9726 will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk[bot]]

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[mlbridge[bot]]

Webrevs

• 01: Full - Incremental (54c93338)
• 00: Full (a961fcdc)

[openjdk[bot]]

⚠️ @tschatzl This pull request contains merges that bring in commits not present in the target repository. Since this is not a "merge style" pull request, these changes will be squashed when this pull request in integrated. If this is your intention, then please ignore this message. If you want to preserve the commit structure, you must change the title of this pull request to Merge <project>:<branch> where <project> is the name of another project in the OpenJDK organization (for example Merge jdk:master).

[tschatzl]

Closing this because (wrongly) merging with master added lots of unneeded changes making it very hard to review.