RFR: 8236073: G1: Use SoftMaxHeapSize to guide GC heuristics [v2]
Man Cao
manc at openjdk.org
Wed Mar 26 06:40:46 UTC 2025
> Hi all,
>
> I have implemented SoftMaxHeapSize for G1 as attached. It is completely reworked compared to [previous PR](https://github.com/openjdk/jdk/pull/20783), and excludes code for `CurrentMaxHeapSize`. I believe I have addressed all direct concerns from [previous email thread](https://mail.openjdk.org/pipermail/hotspot-gc-dev/2024-November/050214.html), such as:
>
> - does not respect `MinHeapSize`;
> - being too "blunt" and does not respect other G1 heuristics and flags for resizing, such as `MinHeapFreeRatio`, `MaxHeapFreeRatio`;
> - does not affect heuristcs to trigger a concurrent cycle;
>
> [This recent thread](https://mail.openjdk.org/pipermail/hotspot-gc-dev/2025-March/051619.html) also has some context.
Man Cao has updated the pull request incrementally with one additional commit since the last revision:
Update copyright year.
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/24211/files
- new: https://git.openjdk.org/jdk/pull/24211/files/b4293e4e..59d1ac69
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=24211&range=01
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=24211&range=00-01
Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
Patch: https://git.openjdk.org/jdk/pull/24211.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/24211/head:pull/24211
PR: https://git.openjdk.org/jdk/pull/24211
More information about the hotspot-gc-dev
mailing list