hg: jdk/sandbox: 8241670: Enhance heap region size ergonomics to improve OOTB performance

[chris.hegarty at oracle.com]

Changeset: a54ff90a3015
Author:    sjohanss
Date:      2020-04-02 21:33 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/a54ff90a3015

8241670: Enhance heap region size ergonomics to improve OOTB performance
Reviewed-by: redestad, tschatzl

! src/hotspot/share/gc/g1/g1Arguments.cpp
! src/hotspot/share/gc/g1/heapRegion.cpp
! src/hotspot/share/gc/g1/heapRegion.hpp
! src/hotspot/share/gc/g1/heapRegionBounds.hpp
! test/hotspot/jtreg/gc/arguments/TestG1HeapRegionSize.java