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1 /* |
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2 * Copyright (c) 2000, 2017, 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_X86_VM_GLOBALS_X86_HPP |
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26 #define CPU_X86_VM_GLOBALS_X86_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 define_pd_global(bool, ShareVtableStubs, true); |
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35 define_pd_global(bool, NeedsDeoptSuspend, false); // only register window machines need this |
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36 |
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37 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks |
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38 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on x86. |
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39 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast |
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40 |
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41 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment. |
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42 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't |
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43 // assign a different value for C2 without touching a number of files. Use |
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44 // #ifdef to minimize the change as it's late in Mantis. -- FIXME. |
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45 // c1 doesn't have this problem because the fix to 4858033 assures us |
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46 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns |
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47 // the uep and the vep doesn't get real alignment but just slops on by |
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48 // only assured that the entry instruction meets the 5 byte size requirement. |
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49 #if defined(COMPILER2) || INCLUDE_JVMCI |
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50 define_pd_global(intx, CodeEntryAlignment, 32); |
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51 #else |
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52 define_pd_global(intx, CodeEntryAlignment, 16); |
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53 #endif // COMPILER2 |
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54 define_pd_global(intx, OptoLoopAlignment, 16); |
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55 define_pd_global(intx, InlineFrequencyCount, 100); |
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56 define_pd_global(intx, InlineSmallCode, 1000); |
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57 |
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58 #define DEFAULT_STACK_YELLOW_PAGES (NOT_WINDOWS(2) WINDOWS_ONLY(3)) |
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59 #define DEFAULT_STACK_RED_PAGES (1) |
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60 #define DEFAULT_STACK_RESERVED_PAGES (NOT_WINDOWS(1) WINDOWS_ONLY(0)) |
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61 |
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62 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES |
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63 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES |
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64 #define MIN_STACK_RESERVED_PAGES (0) |
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65 |
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66 #ifdef _LP64 |
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67 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the |
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68 // stack if compiled for unix and LP64. To pass stack overflow tests we need |
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69 // 20 shadow pages. |
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70 #define DEFAULT_STACK_SHADOW_PAGES (NOT_WIN64(20) WIN64_ONLY(7) DEBUG_ONLY(+2)) |
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71 // For those clients that do not use write socket, we allow |
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72 // the min range value to be below that of the default |
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73 #define MIN_STACK_SHADOW_PAGES (NOT_WIN64(10) WIN64_ONLY(7) DEBUG_ONLY(+2)) |
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74 #else |
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75 #define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5)) |
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76 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES |
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77 #endif // _LP64 |
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78 |
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79 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); |
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80 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); |
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81 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); |
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82 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); |
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83 |
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84 define_pd_global(bool, RewriteBytecodes, true); |
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85 define_pd_global(bool, RewriteFrequentPairs, true); |
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86 |
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87 #ifdef _ALLBSD_SOURCE |
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88 define_pd_global(bool, UseMembar, true); |
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89 #else |
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90 define_pd_global(bool, UseMembar, false); |
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91 #endif |
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92 |
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93 // GC Ergo Flags |
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94 define_pd_global(size_t, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread |
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95 |
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96 define_pd_global(uintx, TypeProfileLevel, 111); |
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97 |
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98 define_pd_global(bool, CompactStrings, true); |
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99 |
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100 define_pd_global(bool, PreserveFramePointer, false); |
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101 |
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102 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong); |
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103 |
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104 #define ARCH_FLAGS(develop, \ |
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105 product, \ |
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106 diagnostic, \ |
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107 experimental, \ |
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108 notproduct, \ |
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109 range, \ |
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110 constraint, \ |
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111 writeable) \ |
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112 \ |
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113 develop(bool, IEEEPrecision, true, \ |
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114 "Enables IEEE precision (for INTEL only)") \ |
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115 \ |
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116 product(bool, UseStoreImmI16, true, \ |
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117 "Use store immediate 16-bits value instruction on x86") \ |
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118 \ |
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119 product(intx, UseAVX, 3, \ |
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120 "Highest supported AVX instructions set on x86/x64") \ |
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121 range(0, 99) \ |
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122 \ |
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123 product(bool, UseCLMUL, false, \ |
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124 "Control whether CLMUL instructions can be used on x86/x64") \ |
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125 \ |
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126 diagnostic(bool, UseIncDec, true, \ |
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127 "Use INC, DEC instructions on x86") \ |
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128 \ |
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129 product(bool, UseNewLongLShift, false, \ |
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130 "Use optimized bitwise shift left") \ |
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131 \ |
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132 product(bool, UseAddressNop, false, \ |
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133 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ |
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134 \ |
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135 product(bool, UseXmmLoadAndClearUpper, true, \ |
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136 "Load low part of XMM register and clear upper part") \ |
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137 \ |
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138 product(bool, UseXmmRegToRegMoveAll, false, \ |
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139 "Copy all XMM register bits when moving value between registers") \ |
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140 \ |
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141 product(bool, UseXmmI2D, false, \ |
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142 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ |
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143 \ |
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144 product(bool, UseXmmI2F, false, \ |
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145 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ |
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146 \ |
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147 product(bool, UseUnalignedLoadStores, false, \ |
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148 "Use SSE2 MOVDQU instruction for Arraycopy") \ |
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149 \ |
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150 product(bool, UseFastStosb, false, \ |
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151 "Use fast-string operation for zeroing: rep stosb") \ |
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152 \ |
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153 /* Use Restricted Transactional Memory for lock eliding */ \ |
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154 product(bool, UseRTMLocking, false, \ |
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155 "Enable RTM lock eliding for inflated locks in compiled code") \ |
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156 \ |
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157 experimental(bool, UseRTMForStackLocks, false, \ |
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158 "Enable RTM lock eliding for stack locks in compiled code") \ |
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159 \ |
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160 product(bool, UseRTMDeopt, false, \ |
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161 "Perform deopt and recompilation based on RTM abort ratio") \ |
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162 \ |
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163 product(int, RTMRetryCount, 5, \ |
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164 "Number of RTM retries on lock abort or busy") \ |
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165 range(0, max_jint) \ |
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166 \ |
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167 experimental(int, RTMSpinLoopCount, 100, \ |
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168 "Spin count for lock to become free before RTM retry") \ |
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169 range(0, max_jint) \ |
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170 \ |
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171 experimental(int, RTMAbortThreshold, 1000, \ |
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172 "Calculate abort ratio after this number of aborts") \ |
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173 range(0, max_jint) \ |
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174 \ |
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175 experimental(int, RTMLockingThreshold, 10000, \ |
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176 "Lock count at which to do RTM lock eliding without " \ |
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177 "abort ratio calculation") \ |
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178 range(0, max_jint) \ |
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179 \ |
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180 experimental(int, RTMAbortRatio, 50, \ |
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181 "Lock abort ratio at which to stop use RTM lock eliding") \ |
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182 range(0, 100) /* natural range */ \ |
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183 \ |
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184 experimental(int, RTMTotalCountIncrRate, 64, \ |
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185 "Increment total RTM attempted lock count once every n times") \ |
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186 range(1, max_jint) \ |
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187 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ |
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188 \ |
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189 experimental(intx, RTMLockingCalculationDelay, 0, \ |
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190 "Number of milliseconds to wait before start calculating aborts " \ |
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191 "for RTM locking") \ |
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192 \ |
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193 experimental(bool, UseRTMXendForLockBusy, true, \ |
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194 "Use RTM Xend instead of Xabort when lock busy") \ |
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195 \ |
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196 /* assembler */ \ |
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197 product(bool, UseCountLeadingZerosInstruction, false, \ |
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198 "Use count leading zeros instruction") \ |
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199 \ |
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200 product(bool, UseCountTrailingZerosInstruction, false, \ |
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201 "Use count trailing zeros instruction") \ |
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202 \ |
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203 product(bool, UseSSE42Intrinsics, false, \ |
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204 "SSE4.2 versions of intrinsics") \ |
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205 \ |
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206 product(bool, UseBMI1Instructions, false, \ |
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207 "Use BMI1 instructions") \ |
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208 \ |
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209 product(bool, UseBMI2Instructions, false, \ |
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210 "Use BMI2 instructions") \ |
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211 \ |
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212 diagnostic(bool, UseLibmIntrinsic, true, \ |
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213 "Use Libm Intrinsics") |
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214 #endif // CPU_X86_VM_GLOBALS_X86_HPP |