8300693: Lower the compile threshold and reduce the iterations of warmup loop in VarHandles tests

[mlchung]

java/lang/invoke/VarHandles tests run with C1, C2 and tiered compilations and the test cases are executed in the warm up loop with 20000 iterations to verify C1, C2 intrinsics. Default Tier4CompileThreshold is 15000.

This PR proposes to scale the compile threshold to 0.1 such that the warm up loop can be reduced to 2000 iterations. This will speed up the test execution time.

Before:
make test-only TEST=open/test/jdk/java/lang/invoke/VarHandles  341.06s user 14.65s system 563% cpu 1:03.14 total

After:
make test-only TEST=open/test/jdk/java/lang/invoke/VarHandles  234.38s user 13.08s system 535% cpu 46.218 total

---

Progress

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• Commit message must refer to an issue

Issue

• JDK-8300693: Lower the compile threshold and reduce the iterations of warmup loop in VarHandles tests

Reviewers

• Jorn Vernee (@JornVernee - Reviewer) ⚠️ Review applies to 0e003531
• David Holmes (@dholmes-ora - Reviewer)
• Paul Sandoz (@PaulSandoz - Reviewer)

Reviewing

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[openjdk]

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[mlbridge]

Webrevs

• 01: Full - Incremental (82382291)
• 00: Full (0e003531)

[openjdk]

@mlchung 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:

8300693: Lower the compile threshold and reduce the iterations of warmup loop in VarHandles tests

Reviewed-by: jvernee, dholmes, psandoz

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 43 new commits pushed to the master branch:

• 03a9a88: 8300265: Remove metaprogramming/isSigned.hpp
• 5a4945c: 8299975: Limit underflow protection CMoveINode in PhaseIdealLoop::do_unroll must also protect type from underflow
• f307e8c: 8299795: Relativize locals in interpreter frames
• 11aadc9: 8244400: MenuItem may cache the size and did not update it when the screen DPI is changed
• 836198a: 8300591: @SuppressWarnings option "lossy-conversions" missing from jdk.compiler module javadoc
• 45e4e00: 8300079: SIGSEGV in LibraryCallKit::inline_string_copy due to constant NULL src argument
• 030b071: 8300207: Add a pre-check for the number of canonical equivalent permutations in j.u.r.Pattern
• 7ced08d: 8300638: Tier1 IR Test failure after JDK-8298632 on macosx-x64-debug
• 3ea4eac: 8300817: The build is broken after JDK-8294693
• cbfc069: 8300731: Avoid unnecessary array fill after creation in PaletteBuilder
• ... and 33 more: https://git.openjdk.org/jdk/compare/d85243f02b34d03bd7af63a5bcbc73f500f720df...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.

[dholmes-ora]

Looks god. Thanks.

[mlchung]

/integrate

[openjdk]

Going to push as commit 86fed79.
Since your change was applied there have been 48 commits pushed to the master branch:

• 4525aa3: 8300867: Fix document issues in java.io
• a7f035d: 8300868: Reduce visibility in java.io.SerialCallbackContext
• 079255e: 8300864: Declare some fields in java.io as final
• a56598f: 8299684: (bf) JNI direct buffer functions with large capacity behave unexpectedly
• 542bfe6: 8300587: (bf) Some covariant overrides are missing @SInCE tags
• 03a9a88: 8300265: Remove metaprogramming/isSigned.hpp
• 5a4945c: 8299975: Limit underflow protection CMoveINode in PhaseIdealLoop::do_unroll must also protect type from underflow
• f307e8c: 8299795: Relativize locals in interpreter frames
• 11aadc9: 8244400: MenuItem may cache the size and did not update it when the screen DPI is changed
• 836198a: 8300591: @SuppressWarnings option "lossy-conversions" missing from jdk.compiler module javadoc
• ... and 38 more: https://git.openjdk.org/jdk/compare/d85243f02b34d03bd7af63a5bcbc73f500f720df...master

Your commit was automatically rebased without conflicts.

[openjdk]

@mlchung Pushed as commit 86fed79.

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