git: openjdk/jdk: 8253237: [REDO] Improve large object handling during evacuation

[Kim Barrett]

Changeset: 0e98fc1c
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2020-09-22 05:14:06 +0000
URL:       https://git.openjdk.java.net/jdk/commit/0e98fc1c

8253237: [REDO] Improve large object handling during evacuation
8253238: [REDO] Improve object array chunking test in G1's copy_to_survivor_space
8253236: [REDO] Investigate fast-path for scanning only objects with references during gc

Generate multiple partial array tasks for large objArrays.

Reviewed-by: sjohanss, ayang, tschatzl

! src/hotspot/share/gc/g1/g1ParScanThreadState.cpp
! src/hotspot/share/gc/g1/g1ParScanThreadState.hpp
+ src/hotspot/share/gc/shared/partialArrayTaskStepper.cpp
+ src/hotspot/share/gc/shared/partialArrayTaskStepper.hpp
+ src/hotspot/share/gc/shared/partialArrayTaskStepper.inline.hpp
! src/hotspot/share/oops/arrayOop.hpp
! src/hotspot/share/oops/objArrayOop.hpp
+ test/hotspot/gtest/gc/shared/test_partialArrayTaskStepper.cpp