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annotate src/cpu/sparc/vm/globals_sparc.hpp @ 17795:a9becfeecd1b

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Merge
author kvn
date Wed, 22 Jan 2014 17:42:23 -0800
parents 55fb97c4c58d 41b780b43b74
children 4ca6dc0799b6
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1 /*
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2 * Copyright (c) 2000, 2013, 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 #ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP
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26 #define CPU_SPARC_VM_GLOBALS_SPARC_HPP
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27
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28 #include "utilities/globalDefinitions.hpp"
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29 #include "utilities/macros.hpp"
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30
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31 // Sets the default values for platform dependent flags used by the runtime system.
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32 // (see globals.hpp)
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33
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34 // For sparc we do not do call backs when a thread is in the interpreter, because the
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35 // interpreter dispatch needs at least two instructions - first to load the dispatch address
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36 // in a register, and second to jmp. The swapping of the dispatch table may occur _after_
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37 // the load of the dispatch address and hence the jmp would still go to the location
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38 // according to the prior table. So, we let the thread continue and let it block by itself.
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39 define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second
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40 define_pd_global(bool, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI
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41 define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
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42 define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter
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43 define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this
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44
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45 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
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46 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc.
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47 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast
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48
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49 define_pd_global(intx, CodeEntryAlignment, 32);
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50 // The default setting 16/16 seems to work best.
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51 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
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52 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
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53 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
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54 define_pd_global(intx, InlineSmallCode, 1500);
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55
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56 #ifdef _LP64
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57 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
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58 define_pd_global(intx, ThreadStackSize, 1024);
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59 define_pd_global(intx, VMThreadStackSize, 1024);
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60 define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1));
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61 #else
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62 define_pd_global(intx, ThreadStackSize, 512);
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63 define_pd_global(intx, VMThreadStackSize, 512);
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64 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
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65 #endif
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66
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67 define_pd_global(intx, StackYellowPages, 2);
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68 define_pd_global(intx, StackRedPages, 1);
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69
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70 define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center
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72 define_pd_global(bool, RewriteBytecodes, true);
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73 define_pd_global(bool, RewriteFrequentPairs, true);
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75 define_pd_global(bool, UseMembar, false);
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76
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77 // GC Ergo Flags
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78 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread
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79
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80 define_pd_global(uintx, TypeProfileLevel, 0);
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81
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82 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
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83 \
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84 product(intx, UseVIS, 99, \
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85 "Highest supported VIS instructions set on Sparc") \
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86 \
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87 product(bool, UseCBCond, false, \
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88 "Use compare and branch instruction on SPARC") \
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89 \
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90 product(bool, UseBlockZeroing, false, \
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91 "Use special cpu instructions for block zeroing") \
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92 \
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93 product(intx, BlockZeroingLowLimit, 2048, \
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94 "Minimum size in bytes when block zeroing will be used") \
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95 \
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96 product(bool, UseBlockCopy, false, \
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97 "Use special cpu instructions for block copy") \
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98 \
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99 product(intx, BlockCopyLowLimit, 2048, \
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100 "Minimum size in bytes when block copy will be used") \
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101 \
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102 develop(bool, UseV8InstrsOnly, false, \
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103 "Use SPARC-V8 Compliant instruction subset") \
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104 \
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105 product(bool, UseNiagaraInstrs, false, \
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106 "Use Niagara-efficient instruction subset") \
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107 \
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108 develop(bool, UseCASForSwap, false, \
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109 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
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110 \
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111 product(uintx, ArraycopySrcPrefetchDistance, 0, \
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112 "Distance to prefetch source array in arracopy") \
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113 \
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114 product(uintx, ArraycopyDstPrefetchDistance, 0, \
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115 "Distance to prefetch destination array in arracopy") \
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116
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117 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP