RFR: 8324186: AARCH64: Use "dmb.ishst+dmb.ishld" for release barrier

[kuaiwei]

On Mon, 22 Jan 2024 13:58:35 GMT, Nick Gasson <ngasson at openjdk.org> wrote:

> > I wonder if this was tested on other vendors' hardware? I witnessed some negative impact at least on HiSilicon TSV110 running the same JMH. So I guess it might be safer to go as a vendor-specific change.
> 
> I tried a number of different machines and saw regressions only on Kunpeng-920 (same CPU?) and A57 which is quite niche at this point.

Thanks for test on other architecture. We may need a new arch dependent flag for it.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/17511#issuecomment-1904205751