This happens on linux-x64 and mac-aarch64 too but more noticeable on windows-x64.
I did a CI build-by build trend and the regression started with JDK-8344009.

This is the JDK repo JMH org.openjdk.bench.vm.gc.systemgc.OneBigObject.gc run with these options:

-XX:+UseParallelGC -Xmx5g -Xms5g -Xmn3g -XX:+AlwaysPreTouch

We run on OCI BM O3.36 with a Windows Server OS.