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annotate src/share/vm/runtime/orderAccess.cpp @ 7397:442f942757c0

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8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack Summary: Set the value of MarkStackSize to a value based on the number of parallel marking threads with a reasonable minimum. Expand the marking stack if we have to restart marking due to an overflow up to a reasonable maximum. Allocate the underlying space for the marking stack from virtual memory. Reviewed-by: jmasa, brutisso
author johnc
date Mon, 01 Oct 2012 09:28:13 -0700
parents f95d63e2154a
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1 /*
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2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "runtime/orderAccess.hpp"
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27 #include "runtime/stubRoutines.hpp"
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28 #include "runtime/thread.hpp"
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29
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30 void OrderAccess::StubRoutines_fence() {
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31 // Use a stub if it exists. It may not exist during bootstrap so do
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32 // nothing in that case but assert if no fence code exists after threads have been created
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33 void (*func)() = CAST_TO_FN_PTR(void (*)(), StubRoutines::fence_entry());
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34
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35 if (func != NULL) {
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36 (*func)();
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37 return;
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38 }
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39 assert(Threads::number_of_threads() == 0, "for bootstrap only");
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40 }