view hotspot/src/share/vm/gc/g1/g1ConcurrentMarkObjArrayProcessor.inline.hpp @ 42597:a9611bab7578

8057003: Large reference arrays cause extremely long synchronization times Summary: Slice large object arrays into parts so that the synchronization of marking threads with an STW pause request does not take long. Reviewed-by: ehelin, pliden
author tschatzl
date Thu, 24 Nov 2016 11:27:57 +0100
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/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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#ifndef SHARE_VM_GC_G1_G1CONCURRENTMARKOBJARRAYPROCESSOR_INLINE_HPP
#define SHARE_VM_GC_G1_G1CONCURRENTMARKOBJARRAYPROCESSOR_INLINE_HPP

#include "oops/oop.inline.hpp"
#include "oops/oopsHierarchy.hpp"
#include "runtime/globals.hpp"

inline bool G1CMObjArrayProcessor::should_be_sliced(oop obj) {
  return obj->is_objArray() && ((size_t)((objArrayOop)obj)->size()) >= 2 * ObjArrayMarkingStride;
}

#endif /* SHARE_VM_GC_G1_G1CONCURRENTMARKOBJARRAYPROCESSOR_INLINE_HPP */