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comparison src/cpu/sparc/vm/globals_sparc.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 f95d63e2154a
children 28d91e43ab6d
comparison
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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.
49 // The default setting 16/16 seems to work best. 49 // The default setting 16/16 seems to work best.
50 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.) 50 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
51 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize 51 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
52 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC 52 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
53 define_pd_global(intx, InlineSmallCode, 1500); 53 define_pd_global(intx, InlineSmallCode, 1500);
54
54 #ifdef _LP64 55 #ifdef _LP64
55 // Stack slots are 2X larger in LP64 than in the 32 bit VM. 56 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
56 define_pd_global(intx, ThreadStackSize, 1024); 57 define_pd_global(intx, ThreadStackSize, 1024);
57 define_pd_global(intx, VMThreadStackSize, 1024); 58 define_pd_global(intx, VMThreadStackSize, 1024);
58 #else 59 #else
69 define_pd_global(bool, RewriteBytecodes, true); 70 define_pd_global(bool, RewriteBytecodes, true);
70 define_pd_global(bool, RewriteFrequentPairs, true); 71 define_pd_global(bool, RewriteFrequentPairs, true);
71 72
72 define_pd_global(bool, UseMembar, false); 73 define_pd_global(bool, UseMembar, false);
73 74
75 // GC Ergo Flags
76 define_pd_global(intx, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread
74 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP 77 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP