1 /* 2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 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 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef CPU_X86_VM_GLOBALS_X86_HPP 26 #define CPU_X86_VM_GLOBALS_X86_HPP 27 28 #include "utilities/globalDefinitions.hpp" 29 #include "utilities/macros.hpp" 30 31 // Sets the default values for platform dependent flags used by the runtime system. 32 // (see globals.hpp) 33 34 define_pd_global(bool, ShareVtableStubs, true); 35 define_pd_global(bool, NeedsDeoptSuspend, false); // only register window machines need this 36 37 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 38 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on x86. 39 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast 40 41 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment. 42 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't 43 // assign a different value for C2 without touching a number of files. Use 44 // #ifdef to minimize the change as it's late in Mantis. -- FIXME. 45 // c1 doesn't have this problem because the fix to 4858033 assures us 46 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns 47 // the uep and the vep doesn't get real alignment but just slops on by 48 // only assured that the entry instruction meets the 5 byte size requirement. 49 #if defined(COMPILER2) || INCLUDE_JVMCI 50 define_pd_global(intx, CodeEntryAlignment, 32); 51 #else 52 define_pd_global(intx, CodeEntryAlignment, 16); 53 #endif // COMPILER2 54 define_pd_global(intx, OptoLoopAlignment, 16); 55 define_pd_global(intx, InlineFrequencyCount, 100); 56 define_pd_global(intx, InlineSmallCode, 1000); 57 58 #define DEFAULT_STACK_YELLOW_PAGES (NOT_WINDOWS(2) WINDOWS_ONLY(3)) 59 #define DEFAULT_STACK_RED_PAGES (1) 60 #define DEFAULT_STACK_RESERVED_PAGES (NOT_WINDOWS(1) WINDOWS_ONLY(0)) 61 62 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 63 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 64 #define MIN_STACK_RESERVED_PAGES (0) 65 66 #ifdef AMD64 67 // Very large C++ stack frames using solaris-amd64 optimized builds 68 // due to lack of optimization caused by C++ compiler bugs 69 #define DEFAULT_STACK_SHADOW_PAGES (NOT_WIN64(20) WIN64_ONLY(7) DEBUG_ONLY(+2)) 70 // For those clients that do not use write socket, we allow 71 // the min range value to be below that of the default 72 #define MIN_STACK_SHADOW_PAGES (NOT_WIN64(10) WIN64_ONLY(7) DEBUG_ONLY(+2)) 73 #else 74 #define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5)) 75 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES 76 #endif // AMD64 77 78 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 79 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 80 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 81 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 82 83 define_pd_global(bool, RewriteBytecodes, true); 84 define_pd_global(bool, RewriteFrequentPairs, true); 85 86 #ifdef _ALLBSD_SOURCE 87 define_pd_global(bool, UseMembar, true); 88 #else 89 define_pd_global(bool, UseMembar, false); 90 #endif 91 92 // GC Ergo Flags 93 define_pd_global(size_t, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread 94 95 define_pd_global(uintx, TypeProfileLevel, 111); 96 97 define_pd_global(bool, CompactStrings, true); 98 99 define_pd_global(bool, PreserveFramePointer, false); 100 101 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong); 102 103 #define ARCH_FLAGS(develop, \ 104 product, \ 105 diagnostic, \ 106 experimental, \ 107 notproduct, \ 108 range, \ 109 constraint, \ 110 writeable) \ 111 \ 112 develop(bool, IEEEPrecision, true, \ 113 "Enables IEEE precision (for INTEL only)") \ 114 \ 115 product(bool, UseStoreImmI16, true, \ 116 "Use store immediate 16-bits value instruction on x86") \ 117 \ 118 product(intx, UseAVX, 99, \ 119 "Highest supported AVX instructions set on x86/x64") \ 120 range(0, 99) \ 121 \ 122 product(bool, UseCLMUL, false, \ 123 "Control whether CLMUL instructions can be used on x86/x64") \ 124 \ 125 diagnostic(bool, UseIncDec, true, \ 126 "Use INC, DEC instructions on x86") \ 127 \ 128 product(bool, UseNewLongLShift, false, \ 129 "Use optimized bitwise shift left") \ 130 \ 131 product(bool, UseAddressNop, false, \ 132 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 133 \ 134 product(bool, UseXmmLoadAndClearUpper, true, \ 135 "Load low part of XMM register and clear upper part") \ 136 \ 137 product(bool, UseXmmRegToRegMoveAll, false, \ 138 "Copy all XMM register bits when moving value between registers") \ 139 \ 140 product(bool, UseXmmI2D, false, \ 141 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 142 \ 143 product(bool, UseXmmI2F, false, \ 144 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 145 \ 146 product(bool, UseUnalignedLoadStores, false, \ 147 "Use SSE2 MOVDQU instruction for Arraycopy") \ 148 \ 149 product(bool, UseFastStosb, false, \ 150 "Use fast-string operation for zeroing: rep stosb") \ 151 \ 152 /* Use Restricted Transactional Memory for lock eliding */ \ 153 product(bool, UseRTMLocking, false, \ 154 "Enable RTM lock eliding for inflated locks in compiled code") \ 155 \ 156 experimental(bool, UseRTMForStackLocks, false, \ 157 "Enable RTM lock eliding for stack locks in compiled code") \ 158 \ 159 product(bool, UseRTMDeopt, false, \ 160 "Perform deopt and recompilation based on RTM abort ratio") \ 161 \ 162 product(uintx, RTMRetryCount, 5, \ 163 "Number of RTM retries on lock abort or busy") \ 164 range(0, max_uintx) \ 165 \ 166 experimental(intx, RTMSpinLoopCount, 100, \ 167 "Spin count for lock to become free before RTM retry") \ 168 \ 169 experimental(intx, RTMAbortThreshold, 1000, \ 170 "Calculate abort ratio after this number of aborts") \ 171 \ 172 experimental(intx, RTMLockingThreshold, 10000, \ 173 "Lock count at which to do RTM lock eliding without " \ 174 "abort ratio calculation") \ 175 \ 176 experimental(intx, RTMAbortRatio, 50, \ 177 "Lock abort ratio at which to stop use RTM lock eliding") \ 178 \ 179 experimental(intx, RTMTotalCountIncrRate, 64, \ 180 "Increment total RTM attempted lock count once every n times") \ 181 \ 182 experimental(intx, RTMLockingCalculationDelay, 0, \ 183 "Number of milliseconds to wait before start calculating aborts " \ 184 "for RTM locking") \ 185 \ 186 experimental(bool, UseRTMXendForLockBusy, true, \ 187 "Use RTM Xend instead of Xabort when lock busy") \ 188 \ 189 /* assembler */ \ 190 product(bool, UseCountLeadingZerosInstruction, false, \ 191 "Use count leading zeros instruction") \ 192 \ 193 product(bool, UseCountTrailingZerosInstruction, false, \ 194 "Use count trailing zeros instruction") \ 195 \ 196 product(bool, UseSSE42Intrinsics, false, \ 197 "SSE4.2 versions of intrinsics") \ 198 \ 199 product(bool, UseBMI1Instructions, false, \ 200 "Use BMI1 instructions") \ 201 \ 202 product(bool, UseBMI2Instructions, false, \ 203 "Use BMI2 instructions") \ 204 \ 205 diagnostic(bool, UseLibmIntrinsic, true, \ 206 "Use Libm Intrinsics") 207 #endif // CPU_X86_VM_GLOBALS_X86_HPP