On Fri, 6 Dec 2024 16:30:47 GMT, Quan Anh Mai <qa...@openjdk.org> wrote:
> Hi, > > This patch improves the performance of a typical `Arena::allocate` in several > ways: > > - Delay the creation of the NativeMemorySegmentImpl. This avoids the merge of > the instance with the one obtained from the call in the uncommon path, > increasing the chance the object being scalar replaced. > - Split the allocation of over-aligned memory to a slow-path method. > - Align the memory to 8 bytes, allowing faster zeroing. > - Use a dedicated method to zero the just-allocated native memory, reduce > code size and make it more straightforward. > - Make `VM.pageAlignDirectMemory` a `Boolean` instead of a `boolean` so that > `false` value can be constant folded. > > Please take a look and leave your reviews, thanks a lot. This pull request has now been integrated. Changeset: e1bcff3a Author: Quan Anh Mai <qa...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/e1bcff3ada9214940e9c71ba4ed5ba93d0218af2 Stats: 72 lines in 4 files changed: 27 ins; 17 del; 28 mod 8345687: Improve the implementation of SegmentFactories::allocateSegment Reviewed-by: jvernee, mcimadamore ------------- PR: https://git.openjdk.org/jdk/pull/22610
