Integrated: 8325872: Make GuaranteedSafepointInterval default 0

[Coleen Phillimore]

On Wed, 17 Apr 2024 16:03:57 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This change keeps the GuaranteedSafepointInterval option for use with -XX:+HandshakeALot and -XX:+SafepointALot and removes it from working with the MonitorDeflationThread.  The MonitorDeflation thread has it's own timers and doesn't require safepoint to trigger anymore, so the GuaranteedSafepointInterval is logically unrelated except for historical reasons.
> The option AsyncDeflationInterval default is 250 so was used anyway in this code for the monitor deflation thread timer.
> 
> Tested with tier1-8.  Also performance tested this which didn't show any improvements.

This pull request has now been integrated.

Changeset: 60b65e60
Author:    Coleen Phillimore <coleenp at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/60b65e60906026b3cd5e8829c464a31df5898bdc
Stats:     54 lines in 5 files changed: 10 ins; 29 del; 15 mod

8325872: Make GuaranteedSafepointInterval default 0

Reviewed-by: shade, eosterlund, dcubed

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PR: https://git.openjdk.org/jdk/pull/18820