On Wed, 15 Nov 2023 17:03:38 GMT, Steve Dohrmann <d...@openjdk.org> wrote:
>> Do you see any concerns while handling multithreaded case where writer is >> busy copying 256 bytes block in loop and reader try to access a location >> still not flushed out of write combining buffer. > > The results a concurrent reader sees could be different if the copy is using > nt writes, but if the read of the destination is not synced with the copy > operation, I think the reader would not see consistent state in either case. > Is it worse with nt writes? Thanks for the clarification, agree behavior is similar to non-NT case, in fact using NT for huge copy operations will prevent polluting caches due to destination cache line fills. ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/16575#discussion_r1395171526
