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

[Nick Gasson]

On Mon, 22 Jan 2024 10:18:27 GMT, Andrew Haley <aph 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.

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

PR Comment: https://git.openjdk.org/jdk/pull/17511#issuecomment-1904060889