Integrated: 8322043: HeapDumper should use parallel dump by default

[Alex Menkov]

On Fri, 12 Apr 2024 02:17:34 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

> The fix makes VM heap dumping parallel by default.
> `jcmd GC.heap_dump` and `jmap -dump` had parallel dumping by default, the fix affects `HotSpotDiagnosticMXBean.dumpHeap()`, `-XX:+HeapDumpBeforeFullGC`, `-XX:+HeapDumpAfterFullGC` and `-XX:+HeapDumpOnOutOfMemoryError`.
> 
> Testing:
>   - manually tested different heap dump scenarios with `-Xlog:heapdump`;
>   - tier1,tier2,hs-tier5-svc;
>   - all reg.tests that use heap dump.

This pull request has now been integrated.

Changeset: 0a24daec
Author:    Alex Menkov <amenkov at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/0a24daecebd90eb46a813923bb2d5672514197ce
Stats:     16 lines in 3 files changed: 12 ins; 0 del; 4 mod

8322043: HeapDumper should use parallel dump by default

Reviewed-by: yyang, sspitsyn, dholmes

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PR: https://git.openjdk.org/jdk/pull/18748