RFR: 8322537: Parallel: Remove experimental adjustment in PSAdaptiveSizePolicy

[Albert Mingkun Yang]

On Thu, 21 Dec 2023 14:16:25 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Removing this setter (and other similar ones) changes the values of the externally observable performance counters. Not sure if this has been intended.

Yes, that is intended. That perf-counter lives in the "unstable and unsupported name space" (https://github.com/openjdk/jdk/blob/master/src/hotspot/share/runtime/perfData.cpp#L56).

Having the indicated action recorded in the perf-counter was probably used to aid the development of AdaptiveSizePolicy. However, its existence solely complicates the flow nowadays. Therefore, I propose removing it completely. (Ofc, one can always perform another round of experiment to improve AdaptiveSizePolicy afterwards.)

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PR Review Comment: https://git.openjdk.org/jdk/pull/17166#discussion_r1439277814