52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
/*
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "precompiled.hpp"
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#include "gc/z/zAddressSpaceLimit.hpp"
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#include "gc/z/zGlobals.hpp"
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#include "runtime/os.hpp"
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#include "utilities/align.hpp"
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static size_t address_space_limit() {
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julong limit = 0;
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if (os::has_allocatable_memory_limit(&limit)) {
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return (size_t)limit;
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}
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// No limit
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return SIZE_MAX;
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}
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size_t ZAddressSpaceLimit::mark_stack() {
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// Allow mark stacks to occupy 10% of the address space
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const size_t limit = address_space_limit() / 10;
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return align_up(limit, ZMarkStackSpaceExpandSize);
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}
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size_t ZAddressSpaceLimit::heap_view() {
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// Allow all heap views to occupy 50% of the address space
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const size_t limit = address_space_limit() / 2 / ZHeapViews;
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return align_up(limit, ZGranuleSize);
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}
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