Mercurial > hg > truffle
comparison src/cpu/sparc/vm/globals_sparc.hpp @ 2368:dde920245681
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 |
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date | Wed, 16 Mar 2011 10:37:08 -0700 |
parents | f95d63e2154a |
children | 28d91e43ab6d |
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2367:1abd292f8c38 | 2368:dde920245681 |
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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 |