8260584: Shenandoah: simplify "Concurrent Thread Roots" logging

[shipilev]

There are two separate counters now:

 f(conc_thread_roots, "Concurrent Stack Processing") \
 f(conc_thread_roots_work, " Threads") \
  SHENANDOAH_PAR_PHASE_DO(conc_thread_roots_work_, " CT: ", f) \

...and _work counter is unused, and conc_thread_roots is used to report worker stats. So the log says <total>, where Thread Roots should have been mentioned:

[34.169s][info][gc,stats] Concurrent Stack Processing       11341 us, parallelism: 7.93x
[34.169s][info][gc,stats]   Threads                         89908 us
[34.169s][info][gc,stats]     CT: <total>                   89908 us, workers (us): 11231, 11270, 11251, 11252, 11237, 11230, 11214, 11223, 

Fixed log says:

[99.797s][info][gc,stats] Concurrent Thread Roots            3929 us, parallelism: 7.45x
[99.797s][info][gc,stats]   CTR: <total>                    29273 us
[99.797s][info][gc,stats]   CTR: Thread Roots               29273 us, workers (us): 3652, 3643, 3622, 3623, 3623, 3676, 3606, 3829, 

Also, I believe it should be called "Concurrent Thread Roots", in symmetry with "Concurrent Update Thread Roots" later.

---

Progress

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Issue

• JDK-8260584: Shenandoah: simplify "Concurrent Thread Roots" logging

Reviewers

• Roman Kennke (@rkennke - Reviewer)
• Zhengyu Gu (@zhengyu123 - Reviewer)

Download

$ git fetch https://git.openjdk.java.net/jdk pull/2287/head:pull/2287
$ git checkout pull/2287

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[openjdk]

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

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[mlbridge]

Webrevs

• 00: Full (5119b72)

[rkennke]

Looks good to me. Thank you!

[openjdk]

@shipilev 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:

8260584: Shenandoah: simplify "Concurrent Thread Roots" logging

Reviewed-by: rkennke, zgu

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At the time when this comment was updated there had been 8 new commits pushed to the master branch:

• 20e7df5: 8260466: Test TestHeapDumpOnOutOfMemoryError.java needs multiple @test sections
• 11d6467: 8260407: cmp != __null && cmp->Opcode() == Op_CmpL failure with -XX:StressLongCountedLoop=200000000 in lucene
• d07af2b: 8255531: MethodHandles::permuteArguments throws NPE when duplicating dropped arguments
• a68c6c2: 8260579: PPC64 and S390 builds failures after JDK-8260467
• 8752257: 8260502: [s390] NativeMovRegMem::verify() fails because it's too strict
• 8fe1323: 8260520: Avoid getting permissions in JarFileFactory when no SecurityManager installed
• ecde52e: 8260506: VersionHelper cleanup
• a97aedf: 8256215: Shenandoah: re-organize saving/restoring machine state in assembler code

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
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.

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[zhengyu123]

Looks good.

[shipilev]

/integrate

[openjdk]

@shipilev Since your change was applied there have been 13 commits pushed to the master branch:

• bbbfaa5: 8249262: Initialize InstanceKlass::_package_entry during CDS dump time
• 3aabbd7: 8260432: allocateSpaceForGP in freetypeScaler.c might leak memory
• abc4300: 8257746: Regression introduced with JDK-8250984 - memory might be null in some machines
• 13ca433: 8259628: jdk/net/ExtendedSocketOption/AsynchronousSocketChannelNAPITest.java fails intermittently
• baf46ba: 8259801: Enable XML Signature secure validation mode by default
• 20e7df5: 8260466: Test TestHeapDumpOnOutOfMemoryError.java needs multiple @test sections
• 11d6467: 8260407: cmp != __null && cmp->Opcode() == Op_CmpL failure with -XX:StressLongCountedLoop=200000000 in lucene
• d07af2b: 8255531: MethodHandles::permuteArguments throws NPE when duplicating dropped arguments
• a68c6c2: 8260579: PPC64 and S390 builds failures after JDK-8260467
• 8752257: 8260502: [s390] NativeMovRegMem::verify() fails because it's too strict
• ... and 3 more: https://git.openjdk.java.net/jdk/compare/316d52c1a5765aeb441382c715f4d7664c8de63f...master

Your commit was automatically rebased without conflicts.

Pushed as commit 1de3c55.

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