> This patch adds a simple policy to put a limit on field flattening to prevent > instances from becoming too large. It is easy to generate very huge instances > with nested flat values, so huge that the JVM struggles to allocate its > internal data structure to handle such classes. The new policy allocates a > flattening budget to each class, and field flattening in this class stops > when the budget is exhausted. The limit can be tuned with a VM parameter. > > Tested on Mach5 tier1-4 > > --------- > - [X] I confirm that I make this contribution in accordance with the [OpenJDK > Interim AI Policy](https://openjdk.org/legal/ai).
Frederic Parain has updated the pull request incrementally with two additional commits since the last revision: - Silently skip the test when flattening conditions are not satisfied - Add argument and CDS validation of the new VM option ------------- Changes: - all: https://git.openjdk.org/valhalla/pull/2372/files - new: https://git.openjdk.org/valhalla/pull/2372/files/c1c58e34..e7c31ecb Webrevs: - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2372&range=01 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2372&range=00-01 Stats: 41 lines in 3 files changed: 36 ins; 1 del; 4 mod Patch: https://git.openjdk.org/valhalla/pull/2372.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2372/head:pull/2372 PR: https://git.openjdk.org/valhalla/pull/2372
