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annotate src/cpu/ppc/vm/globals_ppc.hpp @ 20304:a22acf6d7598

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8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso
author tschatzl
date Mon, 21 Jul 2014 10:00:31 +0200
parents 67fa91961822
children
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1 /*
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2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2012, 2013 SAP AG. All rights reserved.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #ifndef CPU_PPC_VM_GLOBALS_PPC_HPP
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27 #define CPU_PPC_VM_GLOBALS_PPC_HPP
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28
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29 #include "utilities/globalDefinitions.hpp"
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30 #include "utilities/macros.hpp"
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31
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32 // Sets the default values for platform dependent flags used by the runtime system.
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33 // (see globals.hpp)
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34
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35 define_pd_global(bool, ConvertSleepToYield, true);
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36 define_pd_global(bool, ShareVtableStubs, false); // Improves performance markedly for mtrt and compress.
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37 define_pd_global(bool, NeedsDeoptSuspend, false); // Only register window machines need this.
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38
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39
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40 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks.
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41 define_pd_global(bool, TrapBasedNullChecks, true);
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42 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast.
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43
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44 // Use large code-entry alignment.
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45 define_pd_global(intx, CodeEntryAlignment, 128);
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46 define_pd_global(intx, OptoLoopAlignment, 16);
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47 define_pd_global(intx, InlineFrequencyCount, 100);
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48 define_pd_global(intx, InlineSmallCode, 1500);
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49
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50 define_pd_global(intx, PreInflateSpin, 10);
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51
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52 // Flags for template interpreter.
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53 define_pd_global(bool, RewriteBytecodes, true);
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54 define_pd_global(bool, RewriteFrequentPairs, true);
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55
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56 define_pd_global(bool, UseMembar, false);
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57
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58 // GC Ergo Flags
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59 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread.
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60
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61 define_pd_global(uintx, TypeProfileLevel, 0);
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62
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63 // Platform dependent flag handling: flags only defined on this platform.
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64 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
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65 \
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66 /* Load poll address from thread. This is used to implement per-thread */ \
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67 /* safepoints on platforms != IA64. */ \
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68 product(bool, LoadPollAddressFromThread, false, \
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69 "Load polling page address from thread object (required for " \
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70 "per-thread safepoints on platforms != IA64)") \
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71 \
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72 product(uintx, PowerArchitecturePPC64, 0, \
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73 "CPU Version: x for PowerX. Currently recognizes Power5 to " \
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74 "Power7. Default is 0. CPUs newer than Power7 will be " \
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75 "recognized as Power7.") \
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76 \
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77 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \
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78 /* indirect call by a direct call. */ \
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79 product(bool, ReoptimizeCallSequences, true, \
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80 "Reoptimize code-sequences of calls at runtime.") \
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81 \
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82 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \
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83 "Use load instructions for stack banging.") \
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84 \
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85 /* special instructions */ \
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86 \
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87 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \
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88 "Use count leading zeros instructions.") \
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89 \
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90 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \
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91 "Use extended versions of load-and-reserve instructions.") \
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92 \
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93 product(bool, UseRotateAndMaskInstructionsPPC64, true, \
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94 "Use rotate and mask instructions.") \
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95 \
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96 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \
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97 "Use static branch prediction hints in CAS operations.") \
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98 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \
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99 "Use static branch prediction hints for uncommon paths.") \
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100 \
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101 product(bool, UsePower6SchedulerPPC64, false, \
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102 "Use Power6 Scheduler.") \
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103 \
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104 product(bool, InsertEndGroupPPC64, false, \
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105 "Insert EndGroup instructions to optimize for Power6.") \
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106 \
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107 /* Trap based checks. */ \
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108 /* Trap based checks use the ppc trap instructions to check certain */ \
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109 /* conditions. This instruction raises a SIGTRAP caught by the */ \
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110 /* exception handler of the VM. */ \
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111 product(bool, UseSIGTRAP, true, \
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112 "Allow trap instructions that make use of SIGTRAP. Use this to " \
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113 "switch off all optimizations requiring SIGTRAP.") \
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114 product(bool, TrapBasedICMissChecks, true, \
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115 "Raise and handle SIGTRAP if inline cache miss detected.") \
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116 product(bool, TrapBasedNotEntrantChecks, true, \
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117 "Raise and handle SIGTRAP if calling not entrant or zombie" \
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118 " method.") \
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119 product(bool, TraceTraps, false, "Trace all traps the signal handler" \
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120 "handles.") \
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121 \
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122 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \
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123 " Use this to ease debugging.") \
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124
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125
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126 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP