RFR: 8329223: Parallel: Parallel GC resizes heap even if -Xms = -Xmx [v7]

[Albert Mingkun Yang]

On Tue, 23 Apr 2024 16:23:41 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> github action fails on macosx aarch64 (the same kind of machine I use)

Could you debug the failure on your macosx-aarch64 machine to identify how `initial_old_size = MinOldSize` results into the failure? (The error msg in GHA is rather limited.) One can probably print out the value for all related flags, `NewSize`, `OldSize`, `InitialHeapSize`, etc for the problematic case, and launch `java` on the cmdline (without `gtest`) with those flags.

> I could not reproduce the failure on Linux

My linux works fine as well, just fyi.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18539#discussion_r1576598102