From 337673528e76e17e3a76ca84b76fb0d1e7fb5ec0 Mon Sep 17 00:00:00 2001
From: Stefan Johansson <sjohanss@openjdk.org>
Date: Thu, 15 Mar 2018 11:58:58 +0100
Subject: [PATCH] 8199674: Improve G1 Full GC array marking

Reviewed-by: tschatzl, shade
---
 src/hotspot/share/gc/g1/g1FullGCMarker.inline.hpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/hotspot/share/gc/g1/g1FullGCMarker.inline.hpp b/src/hotspot/share/gc/g1/g1FullGCMarker.inline.hpp
index b01269e8764..0894f11f3dd 100644
--- a/src/hotspot/share/gc/g1/g1FullGCMarker.inline.hpp
+++ b/src/hotspot/share/gc/g1/g1FullGCMarker.inline.hpp
@@ -107,6 +107,11 @@ void G1FullGCMarker::follow_array_chunk(objArrayOop array, int index) {
   const int stride = MIN2(len - beg_index, (int) ObjArrayMarkingStride);
   const int end_index = beg_index + stride;
 
+  // Push the continuation first to allow more efficient work stealing.
+  if (end_index < len) {
+    push_objarray(array, end_index);
+  }
+
   array->oop_iterate_range(mark_closure(), beg_index, end_index);
 
   if (VerifyDuringGC) {
@@ -117,10 +122,6 @@ void G1FullGCMarker::follow_array_chunk(objArrayOop array, int index) {
       assert(false, "Failed");
     }
   }
-
-  if (end_index < len) {
-    push_objarray(array, end_index); // Push the continuation.
-  }
 }
 
 inline void G1FullGCMarker::follow_object(oop obj) {