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8260307: Do not include method.hpp in frame.hpp #2201

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iklam
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@iklam iklam commented Jan 22, 2021

frame.hpp is a popular header file (included by 876 out of 1000 HotSpot.o file). It includes method.hpp, which in turn pulls in all the class metadata types such as instanceKlass.hpp, constantPool.hpp, etc.

We can replace the inclusion of method.hpp with a forward declaration of the Method class.

This reduces the number of .o files that include method.hpp from 882 to 586.

HotSpot build time is reduced by more than 2%.

Tested with mach5: tier1, builds-tier2, builds-tier3, builds-tier4 and builds-tier5. Also locally: aarch64, arm, ppc64, s390, x86, and zero.


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$ git fetch https://git.openjdk.java.net/jdk pull/2201/head:pull/2201
$ git checkout pull/2201

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bridgekeeper bot commented Jan 22, 2021

👋 Welcome back iklam! 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.

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openjdk bot commented Jan 22, 2021

@iklam The following labels will be automatically applied to this pull request:

  • hotspot
  • serviceability

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

@openjdk openjdk bot added serviceability serviceability-dev@openjdk.org hotspot hotspot-dev@openjdk.org labels Jan 22, 2021
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iklam commented Jan 22, 2021

/label remove serviceability

@openjdk openjdk bot removed the serviceability serviceability-dev@openjdk.org label Jan 22, 2021
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openjdk bot commented Jan 22, 2021

@iklam
The serviceability label was successfully removed.

@iklam iklam marked this pull request as ready for review January 22, 2021 19:24
@openjdk openjdk bot added the rfr Pull request is ready for review label Jan 22, 2021
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mlbridge bot commented Jan 22, 2021

Webrevs

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@lfoltan lfoltan left a comment

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Looks good.
Lois

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openjdk bot commented Jan 22, 2021

@iklam 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:

8260307: Do not include method.hpp in frame.hpp

Reviewed-by: lfoltan, coleenp

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 no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential 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 Pull request is ready to be integrated label Jan 22, 2021
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This looks good!

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iklam commented Jan 23, 2021

Thanks @coleenp and @lfoltan for the review.
/integrate

@openjdk openjdk bot closed this Jan 23, 2021
@openjdk openjdk bot added integrated Pull request has been integrated and removed ready Pull request is ready to be integrated rfr Pull request is ready for review labels Jan 23, 2021
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openjdk bot commented Jan 23, 2021

@iklam Pushed as commit 5cdcce1.

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

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