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comparison src/cpu/x86/vm/globals_x86.hpp @ 2368:dde920245681

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6896099: Integrate CMS heap ergo with default heap sizing ergo 6627787: CMS: JVM refuses to start up with -Xms16m -Xmx16m 7000125: CMS: Anti-monotone young gen sizing with respect to maximum whole heap size specification 7027529: CMS: retire CMSUseOldDefaults flag Summary: Simplify CMS heap sizing code, relying on ergonomic initial sizing consistent with other collectors for the most part, controlling only young gen sizing to rein in pause times. Make CMS young gen sizing default statically cpu-dependant. Remove inconsistencies wrt generation sizing and policy code, allowing for the fixing for 6627787 and 7000125. For 7027529, retire the flag CMSUseOldDefaults which had been introduced as a bridge from JDK 5 to JDK 6 a number of years ago. Reviewed-by: brutisso, poonam
author ysr
date Wed, 16 Mar 2011 10:37:08 -0700
parents 182e9624aa42
children f08d439fab8c
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2367:1abd292f8c38 2368:dde920245681
1 /* 1 /*
2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
70 define_pd_global(bool, RewriteBytecodes, true); 70 define_pd_global(bool, RewriteBytecodes, true);
71 define_pd_global(bool, RewriteFrequentPairs, true); 71 define_pd_global(bool, RewriteFrequentPairs, true);
72 72
73 define_pd_global(bool, UseMembar, false); 73 define_pd_global(bool, UseMembar, false);
74 74
75 // GC Ergo Flags
76 define_pd_global(intx, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread
75 #endif // CPU_X86_VM_GLOBALS_X86_HPP 77 #endif // CPU_X86_VM_GLOBALS_X86_HPP