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8284990: AArch64: Remove STXR_PREFETCH from CPU features #9641

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@e1iu e1iu commented Jul 26, 2022

As STXR_PREFETCH is usually done unconditionally in non-JVM code, e.g.,
Linux ARM Kernel[1], this patch removes VM_Version::CPU_STXR_PREFETCH
and generates it unconditionally.

[1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/1436779519-2232-16-git-send-email-will.deacon@arm.com/

[TEST]
Full Jtreg passed without new failure.


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  • JDK-8284990: AArch64: Remove STXR_PREFETCH from CPU features

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk pull/9641/head:pull/9641
$ git checkout pull/9641

Update a local copy of the PR:
$ git checkout pull/9641
$ git pull https://git.openjdk.org/jdk pull/9641/head

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Checkout this PR locally:
$ git pr checkout 9641

View PR using the GUI difftool:
$ git pr show -t 9641

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Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/9641.diff

As STXR_PREFETCH is usually done unconditionally in non-JVM code, e.g.,
Linux ARM Kernel[1], this patch removes VM_Version::CPU_STXR_PREFETCH
and generates it unconditionally.

[1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/1436779519-2232-16-git-send-email-will.deacon@arm.com/

[TEST]
Full Jtreg passed without new failure.

Change-Id: I33afb1174c86db386f1bbc63ab8ea56b967f3c52
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bridgekeeper bot commented Jul 26, 2022

👋 Welcome back eliu! 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 Pull request is ready for review label Jul 26, 2022
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openjdk bot commented Jul 26, 2022

@theRealELiu 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.

@openjdk openjdk bot added the hotspot hotspot-dev@openjdk.org label Jul 26, 2022
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mlbridge bot commented Jul 26, 2022

Webrevs

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openjdk bot commented Jul 26, 2022

@theRealELiu 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:

8284990: AArch64: Remove STXR_PREFETCH from CPU features

Reviewed-by: aph, ngasson, njian

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 122 new commits pushed to the master branch:

  • 2a1d9cf: 8289137: Automatically adapt Young/OldPLABSize and when setting only MinTLABSize
  • 4d796ee: 8290887: Unused private method in TrustManagerFactoryImpl
  • f0f78a9: 8290894: Reduce runtime of vm.lang microbenchmarks
  • 1451642: 8244976: vmTestbase/nsk/jdi/Event/request/request001.java doesn' initialize eName
  • 8159a1a: 8290706: Remove the support for inline contiguous allocations
  • 7318b22: 8289551: Conversions between bit representations of half precision values and floats
  • 2ae8e31: 8290669: Fix wording in sun.security.ec
  • 8939095: 8289996: Fix array range check hoisting for some scaled loop iv
  • da9cc5c: 8290806: Only add eager reclaim task to G1 post evacuate tasks if there were candidates
  • 330adc0: 8290969: DumpClassListCLDClosure incorrectly uses ResizeableResourceHashtable
  • ... and 112 more: https://git.openjdk.org/jdk/compare/bc7a1ea249d8438e325c36042f7d8fc7eaaf0e40...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.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@theRealAph, @nick-arm, @nsjian) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

@openjdk openjdk bot added the ready Pull request is ready to be integrated label Jul 26, 2022
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Looks good, thanks for doing this clean-up.

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e1iu commented Jul 27, 2022

/integrate

@openjdk openjdk bot added the sponsor Pull request is ready to be sponsored label Jul 27, 2022
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openjdk bot commented Jul 27, 2022

@theRealELiu
Your change (at version 80a0d32) is now ready to be sponsored by a Committer.

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/sponsor

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openjdk bot commented Jul 27, 2022

Going to push as commit 2bd90c2.
Since your change was applied there have been 122 commits pushed to the master branch:

  • 2a1d9cf: 8289137: Automatically adapt Young/OldPLABSize and when setting only MinTLABSize
  • 4d796ee: 8290887: Unused private method in TrustManagerFactoryImpl
  • f0f78a9: 8290894: Reduce runtime of vm.lang microbenchmarks
  • 1451642: 8244976: vmTestbase/nsk/jdi/Event/request/request001.java doesn' initialize eName
  • 8159a1a: 8290706: Remove the support for inline contiguous allocations
  • 7318b22: 8289551: Conversions between bit representations of half precision values and floats
  • 2ae8e31: 8290669: Fix wording in sun.security.ec
  • 8939095: 8289996: Fix array range check hoisting for some scaled loop iv
  • da9cc5c: 8290806: Only add eager reclaim task to G1 post evacuate tasks if there were candidates
  • 330adc0: 8290969: DumpClassListCLDClosure incorrectly uses ResizeableResourceHashtable
  • ... and 112 more: https://git.openjdk.org/jdk/compare/bc7a1ea249d8438e325c36042f7d8fc7eaaf0e40...master

Your commit was automatically rebased without conflicts.

@openjdk openjdk bot added the integrated Pull request has been integrated label Jul 27, 2022
@openjdk openjdk bot closed this Jul 27, 2022
@openjdk openjdk bot removed ready Pull request is ready to be integrated rfr Pull request is ready for review sponsor Pull request is ready to be sponsored labels Jul 27, 2022
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openjdk bot commented Jul 27, 2022

@nick-arm @theRealELiu Pushed as commit 2bd90c2.

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

@e1iu e1iu deleted the stxr-prefetch branch July 10, 2023 09:54
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