8234020: Remove FullGCCount_lock

[albertnetymk]

Remove an unused method and unnecessary synchronization in Serial GC.

---

Progress

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

Issue

• JDK-8234020: Remove FullGCCount_lock

Reviewers

• Kim Barrett (@kimbarrett - Reviewer) ⚠️ Review applies to 536cde1

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/3679/head:pull/3679
$ git checkout pull/3679

Update a local copy of the PR:
$ git checkout pull/3679
$ git pull https://git.openjdk.java.net/jdk pull/3679/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3679

View PR using the GUI difftool:
$ git pr show -t 3679

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/3679.diff

[bridgekeeper]

👋 Welcome back ayang! 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]

@albertnetymk The following label will be automatically applied to this pull request:

• hotspot

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 01: Full - Incremental (232c64f7)
• 00: Full (536cde17)

[kimbarrett]

Looks good.

[openjdk]

@albertnetymk 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:

8234020: Remove FullGCCount_lock

Reviewed-by: kbarrett

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 48 new commits pushed to the master branch:

• 41daa88: 8265899: Use pattern matching for instanceof at module jdk.compiler(part 1)
• a6f2863: 8266003: ProblemList sanity/client/SwingSet/src/ButtonDemoScreenshotTest.java on macosx-all
• 852a41d: 8258625: [JVMCI] refactor and unify JVMCI readFieldValue path
• b5c6351: 8264663: Update test SuspendWithCurrentThread.java to verify that suspend doesn't exit until resumed
• b524a81: 8265982: JDK-8264188 breaks build on macOS-aarch64
• efe6b93: 8265961: Fix comments in logging.properties
• 65c19c4: 4926314: Optimize Reader.read(CharBuffer)
• 082abbd: 8265900: Use pattern matching for instanceof at module jdk.compiler(part 2)
• 851b219: 8265901: Use pattern matching for instanceof at module jdk.compiler(part 3)
• fb8f0c5: 8261168: Convert javadoc tool to use Stream.toList()
• ... and 38 more: https://git.openjdk.java.net/jdk/compare/191f1fc46c30f7e92ba09d04bc000256442e64ed...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.

[kstefanj]

Looks good, but please also remove:

jdk/src/hotspot/share/runtime/mutexLocker.cpp

Line 75 in 536cde1

Monitor* FullGCCount_lock = NULL;

[albertnetymk]

Thanks for the review.

/integrate

[openjdk]

@albertnetymk Since your change was applied there have been 54 commits pushed to the master branch:

• 4785e11: 8264806: Remove the experimental JIT compiler
• 7db9330: 8196300: java/awt/TextArea/TextAreaScrolling/TextAreaScrolling.java times out
• 694aced: 8264805: Remove the experimental Ahead-of-Time Compiler
• 15d4787: 8265496: improve null check in DeflaterOutputStream/InflaterInputStream
• 1d37b98: 8265972: Remove declarations with no implementations in javaClasses.hpp
• cb29b19: 8184134: HeapRegion::LogOfHRGrainWords is unused
• 41daa88: 8265899: Use pattern matching for instanceof at module jdk.compiler(part 1)
• a6f2863: 8266003: ProblemList sanity/client/SwingSet/src/ButtonDemoScreenshotTest.java on macosx-all
• 852a41d: 8258625: [JVMCI] refactor and unify JVMCI readFieldValue path
• b5c6351: 8264663: Update test SuspendWithCurrentThread.java to verify that suspend doesn't exit until resumed
• ... and 44 more: https://git.openjdk.java.net/jdk/compare/191f1fc46c30f7e92ba09d04bc000256442e64ed...master

Your commit was automatically rebased without conflicts.

Pushed as commit 468c847.

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