On Fri, 29 Mar 2024 22:32:06 GMT, Scott Gibbons <sgibb...@openjdk.org> wrote:
> This code makes an intrinsic stub for `Unsafe::setMemory` for x86_64. See > [this PR](https://github.com/openjdk/jdk/pull/16760) for discussion around > this change. > > Overall, making this an intrinsic improves overall performance of > `Unsafe::setMemory` by up to 4x for all buffer sizes. > > Tested with tier-1 (and full CI). I've added a table of the before and after > numbers for the JMH I ran (`MemorySegmentZeroUnsafe`). > > [setMemoryBM.txt](https://github.com/openjdk/jdk/files/14808974/setMemoryBM.txt) This pull request has now been integrated. Changeset: bd67ac69 Author: Scott Gibbons <sgibb...@openjdk.org> Committer: Jatin Bhateja <jbhat...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/bd67ac69a234cd1096e534c7d4a45d88715884b4 Stats: 507 lines in 36 files changed: 420 ins; 5 del; 82 mod 8329331: Intrinsify Unsafe::setMemory Reviewed-by: sviswanathan, jbhateja, kvn ------------- PR: https://git.openjdk.org/jdk/pull/18555
