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8278031: MultiThreadedRefCounter should not use relaxed atomic decrement #6699

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mgronlun
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@mgronlun mgronlun commented Dec 3, 2021

Greetings,

please help review this small adjustment to the reference counter memory order.

Tests: jdk_jfr

Thanks to @kimbarrett for bringing this to attention.

Markus


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

Issue

  • JDK-8278031: MultiThreadedRefCounter should not use relaxed atomic decrement

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Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/6699/head:pull/6699
$ git checkout pull/6699

Update a local copy of the PR:
$ git checkout pull/6699
$ git pull https://git.openjdk.java.net/jdk pull/6699/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 6699

View PR using the GUI difftool:
$ git pr show -t 6699

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/6699.diff

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@bridgekeeper bridgekeeper bot commented Dec 3, 2021

👋 Welcome back mgronlun! 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 openjdk bot added the rfr label Dec 3, 2021
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@openjdk openjdk bot commented Dec 3, 2021

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

  • hotspot-jfr

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.

@openjdk openjdk bot added the hotspot-jfr label Dec 3, 2021
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@mlbridge mlbridge bot commented Dec 3, 2021

Webrevs

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@kimbarrett kimbarrett left a comment

Looks good.

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@openjdk openjdk bot commented Dec 3, 2021

@mgronlun 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:

8278031: MultiThreadedRefCounter should not use relaxed atomic decrement

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 23 new commits pushed to the master branch:

  • 24e16ac: 8277617: Adjust AVX3Threshold for copy/fill stubs
  • 2b87c2b: 8277793: Support vector F2I and D2L cast operations for X86
  • e1cde19: 8278247: KeyStoreSpi::engineGetAttributes does not throws KeyStoreException
  • a729a70: 8225181: KeyStore should have a getAttributes method
  • 38f525e: 8275821: Optimize random number generators developed in JDK-8248862 using Math.unsignedMultiplyHigh()
  • 780b8b1: 8278179: Enable all doclint warnings for build of java.naming
  • 678ac58: 8278240: ProblemList containers/docker/TestJcmd.java on linux-aarch64
  • 01cb2b9: 8277529: SIGSEGV in C2 CompilerThread Node::rematerialize() compiling Packet::readUnsignedTrint
  • 660f21a: 8278119: ProblemList few headful test failing in macosx12-aarch64 system
  • 2e30fa9: 8278171: [vectorapi] Mask incorrectly computed for zero extending cast
  • ... and 13 more: https://git.openjdk.java.net/jdk/compare/45da3aea22fd85f214e661b2c98631cb91ddb55d...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.

@openjdk openjdk bot added the ready label Dec 3, 2021
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@mgronlun mgronlun commented Dec 6, 2021

/integrate

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@openjdk openjdk bot commented Dec 6, 2021

Going to push as commit d14f06a.
Since your change was applied there have been 32 commits pushed to the master branch:

  • 8d190dd: 8277496: Remove duplication in c1 Block successor lists
  • 194cdf4: 8277864: Compilation error thrown while doing a boxing conversion on selector expression
  • f39fe5b: 8154011: Make TraceDeoptimization a diagnostic flag
  • f180a45: 8278016: Add compiler tests to tier{2,3}
  • 104aa1f: 8268575: Annotations not visible on model elements before they are generated
  • 839b606: 8278143: Remove unused "argc" from ConstantPool::copy_bootstrap_arguments_at_impl
  • 267c024: 8265150: AsyncGetCallTrace crashes on ResourceMark
  • 9642629: 8276779: (ch) InputStream returned by Channels.newInputStream should have fast path for SelectableChannels
  • 02ee337: 8278175: Enable all doclint warnings for build of java.desktop
  • 24e16ac: 8277617: Adjust AVX3Threshold for copy/fill stubs
  • ... and 22 more: https://git.openjdk.java.net/jdk/compare/45da3aea22fd85f214e661b2c98631cb91ddb55d...master

Your commit was automatically rebased without conflicts.

@openjdk openjdk bot closed this Dec 6, 2021
@openjdk openjdk bot added integrated and removed ready rfr labels Dec 6, 2021
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@openjdk openjdk bot commented Dec 6, 2021

@mgronlun Pushed as commit d14f06a.

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

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