On Tue, 25 Oct 2022 13:29:52 GMT, Andrew Haley <a...@openjdk.org> wrote:
> Enabling `-XX:+RestoreMXCSROnJNICalls` makes the overhead much worse: > > ``` > Benchmark Mode Cnt Score Error Units > CallOverheadConstant.jni_blank avgt 40 14.741 ± 0.031 ns/op > CallOverheadConstant.panama_blank avgt 40 14.620 ± 0.022 ns/op > ``` This is Zen+, by the way: Latency of stmxcsr ≤18. Better than some x86_64, worse than others. ------------- PR: https://git.openjdk.org/jdk/pull/10661
