[jdk25u] Integrated: 8361520: Stabilize SystemGC benchmarks

[KavyaKS94]

On Wed, 24 Sep 2025 07:25:37 GMT, KavyaKS94 <duke at openjdk.org> wrote:

> Clean backport. tested locally by running `sudo make test TEST="micro:vm.gc.systemgc"`
> 
> 
> Benchmark                       Mode  Cnt    Score   Error  Units
> AllDead.gc                        ss  125   12.133 ± 1.641  ms/op
> AllLive.gc                        ss  125   44.718 ± 1.723  ms/op
> DifferentObjectSizesArray.gc      ss  125   78.024 ± 5.487  ms/op
> DifferentObjectSizesHashMap.gc    ss  125   90.232 ± 3.675  ms/op
> DifferentObjectSizesTreeMap.gc    ss  125  105.918 ± 3.267  ms/op
> HalfDeadFirstPart.gc              ss  125   27.406 ± 0.601  ms/op
> HalfDeadInterleaved.gc            ss  125   88.963 ± 0.827  ms/op
> HalfDeadInterleavedChunks.gc      ss  125   74.533 ± 3.662  ms/op
> HalfDeadSecondPart.gc             ss  125   27.213 ± 0.452  ms/op
> HalfHashedHalfDead.gc             ss  125   95.042 ± 1.031  ms/op
> NoObjects.gc                      ss  125    9.586 ± 0.327  ms/op
> OneBigObject.gc                   ss  125   74.786 ± 2.621  ms/op
> Finished running test 'micro:vm.gc.systemgc'
> Test report is stored in /Users/kavyaks/jdk25u-cpu/build/macosx-x64/test-results/micro_vm_gc_systemgc
> ==============================
> Test summary
> ==============================
>    TEST                                              TOTAL  PASS  FAIL ERROR  SKIP
>    micro:vm.gc.systemgc                                  1     1     0     0     0
> ==============================
> TEST SUCCESS

This pull request has now been integrated.

Changeset: 503ba0a9
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/jdk25u/commit/503ba0a93fbe172167577ffa11acc7ec402f151b
Stats:     125 lines in 12 files changed: 125 ins; 0 del; 0 mod

8361520: Stabilize SystemGC benchmarks

Backport-of: a9bd1ad40cb4e275d83b2e8b15e3c4be1551f7fc

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PR: https://git.openjdk.org/jdk25u/pull/237