> 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)
Scott Gibbons has updated the pull request incrementally with one additional commit since the last revision: Set memory test (#16) Add framework for other platforms. Moved fill_to_memory_atomic back to the .cpp from the .hpp in order to get 32-bit fixed. ------------- Changes: - all: https://git.openjdk.org/jdk/pull/18555/files - new: https://git.openjdk.org/jdk/pull/18555/files/b0ac8577..95230e29 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=18555&range=08 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18555&range=07-08 Stats: 179 lines in 14 files changed: 115 ins; 49 del; 15 mod Patch: https://git.openjdk.org/jdk/pull/18555.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18555/head:pull/18555 PR: https://git.openjdk.org/jdk/pull/18555
