On Thu, 11 Apr 2024 18:17:01 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) > > 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. I added the framework for setting unsafe access marks within all platforms, and fixed a bug with the Linux 32-bit runtime tests. Adding stub intrinsic for setMemory0 for other platforms should be easier now. Passes CI testing. ------------- PR Comment: https://git.openjdk.org/jdk/pull/18555#issuecomment-2050267842
