8318605: Enable parallelism in vmTestbase/nsk/stress/stack tests

[cost0much]

Clean backport to make vmTestbase/nsk/stress/stack tests parallel

Ran make run-test TEST=vmTestbase/nsk/stress/stack JTREG=REPEAT_COUNT=10
Before:
549.91s user 42.27s system 261% cpu 3:46.34 total
After:
542.52s user 40.49s system 379% cpu 2:33.50 total

---

Progress

• JDK-8318605 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8318605: Enable parallelism in vmTestbase/nsk/stress/stack tests (Enhancement - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev.git pull/3024/head:pull/3024
$ git checkout pull/3024

Update a local copy of the PR:
$ git checkout pull/3024
$ git pull https://git.openjdk.org/jdk11u-dev.git pull/3024/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3024

View PR using the GUI difftool:
$ git pr show -t 3024

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/3024.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back cost0much! 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]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @cost0much This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[cost0much]

/approval request Makes vmTestbase/nsk/stress/stack tests parallel. Clean backport. Passes GHA and vmTestbase/nsk/stress/stack tests. Risk is low: test code only and no change to tests themself.

[openjdk]

@cost0much
8318605: The approval request has been created successfully.

[mlbridge]

Webrevs

• 00: Full (ace04c50)

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[cost0much]

/keepalive

[openjdk]

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