1 /* 2 * Copyright (c) 2000, 2019, 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_GLOBALS_X86_HPP 26 #define CPU_X86_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 36 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 37 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on x86. 38 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast 39 40 define_pd_global(bool, UseFastClassInitChecks, LP64_ONLY( true ) NOT_LP64( false )); // not implemented on x86_32 41 42 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment. 43 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't 44 // assign a different value for C2 without touching a number of files. Use 45 // #ifdef to minimize the change as it's late in Mantis. -- FIXME. 46 // c1 doesn't have this problem because the fix to 4858033 assures us 47 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns 48 // the uep and the vep doesn't get real alignment but just slops on by 49 // only assured that the entry instruction meets the 5 byte size requirement. 50 #if COMPILER2_OR_JVMCI 51 define_pd_global(intx, CodeEntryAlignment, 32); 52 #else 53 define_pd_global(intx, CodeEntryAlignment, 16); 54 #endif // COMPILER2_OR_JVMCI 55 define_pd_global(intx, OptoLoopAlignment, 16); 56 define_pd_global(intx, InlineFrequencyCount, 100); 57 define_pd_global(intx, InlineSmallCode, 1000); 58 59 #define DEFAULT_STACK_YELLOW_PAGES (NOT_WINDOWS(2) WINDOWS_ONLY(3)) 60 #define DEFAULT_STACK_RED_PAGES (1) 61 #define DEFAULT_STACK_RESERVED_PAGES (NOT_WINDOWS(1) WINDOWS_ONLY(0)) 62 63 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 64 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 65 #define MIN_STACK_RESERVED_PAGES (0) 66 67 #ifdef _LP64 68 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 69 // stack if compiled for unix and LP64. To pass stack overflow tests we need 70 // 20 shadow pages. 71 #define DEFAULT_STACK_SHADOW_PAGES (NOT_WIN64(20) WIN64_ONLY(7) DEBUG_ONLY(+2)) 72 // For those clients that do not use write socket, we allow 73 // the min range value to be below that of the default 74 #define MIN_STACK_SHADOW_PAGES (NOT_WIN64(10) WIN64_ONLY(7) DEBUG_ONLY(+2)) 75 #else 76 #define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5)) 77 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES 78 #endif // _LP64 79 80 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 81 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 82 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 83 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 84 85 define_pd_global(bool, RewriteBytecodes, true); 86 define_pd_global(bool, RewriteFrequentPairs, true); 87 88 // GC Ergo Flags 89 define_pd_global(size_t, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread 90 91 define_pd_global(uintx, TypeProfileLevel, 111); 92 93 define_pd_global(bool, CompactStrings, true); 94 95 define_pd_global(bool, PreserveFramePointer, false); 96 97 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong); 98 99 #if defined(_LP64) || defined(_WINDOWS) 100 define_pd_global(bool, ThreadLocalHandshakes, true); 101 #else 102 // get_thread() is slow on linux 32 bit, therefore off by default 103 define_pd_global(bool, ThreadLocalHandshakes, false); 104 #endif 105 106 #define ARCH_FLAGS(develop, \ 107 product, \ 108 diagnostic, \ 109 experimental, \ 110 notproduct, \ 111 range, \ 112 constraint, \ 113 writeable) \ 114 \ 115 develop(bool, IEEEPrecision, true, \ 116 "Enables IEEE precision (for INTEL only)") \ 117 \ 118 product(bool, UseStoreImmI16, true, \ 119 "Use store immediate 16-bits value instruction on x86") \ 120 \ 121 product(intx, UseAVX, 3, \ 122 "Highest supported AVX instructions set on x86/x64") \ 123 range(0, 99) \ 124 \ 125 product(bool, UseCLMUL, false, \ 126 "Control whether CLMUL instructions can be used on x86/x64") \ 127 \ 128 diagnostic(bool, UseIncDec, true, \ 129 "Use INC, DEC instructions on x86") \ 130 \ 131 product(bool, UseNewLongLShift, false, \ 132 "Use optimized bitwise shift left") \ 133 \ 134 product(bool, UseAddressNop, false, \ 135 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 136 \ 137 product(bool, UseXmmLoadAndClearUpper, true, \ 138 "Load low part of XMM register and clear upper part") \ 139 \ 140 product(bool, UseXmmRegToRegMoveAll, false, \ 141 "Copy all XMM register bits when moving value between registers") \ 142 \ 143 product(bool, UseXmmI2D, false, \ 144 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 145 \ 146 product(bool, UseXmmI2F, false, \ 147 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 148 \ 149 product(bool, UseUnalignedLoadStores, false, \ 150 "Use SSE2 MOVDQU instruction for Arraycopy") \ 151 \ 152 product(bool, UseXMMForObjInit, false, \ 153 "Use XMM/YMM MOVDQU instruction for Object Initialization") \ 154 \ 155 product(bool, UseFastStosb, false, \ 156 "Use fast-string operation for zeroing: rep stosb") \ 157 \ 158 /* Use Restricted Transactional Memory for lock eliding */ \ 159 product(bool, UseRTMLocking, false, \ 160 "Enable RTM lock eliding for inflated locks in compiled code") \ 161 \ 162 experimental(bool, UseRTMForStackLocks, false, \ 163 "Enable RTM lock eliding for stack locks in compiled code") \ 164 \ 165 product(bool, UseRTMDeopt, false, \ 166 "Perform deopt and recompilation based on RTM abort ratio") \ 167 \ 168 product(int, RTMRetryCount, 5, \ 169 "Number of RTM retries on lock abort or busy") \ 170 range(0, max_jint) \ 171 \ 172 experimental(int, RTMSpinLoopCount, 100, \ 173 "Spin count for lock to become free before RTM retry") \ 174 range(0, max_jint) \ 175 \ 176 experimental(int, RTMAbortThreshold, 1000, \ 177 "Calculate abort ratio after this number of aborts") \ 178 range(0, max_jint) \ 179 \ 180 experimental(int, RTMLockingThreshold, 10000, \ 181 "Lock count at which to do RTM lock eliding without " \ 182 "abort ratio calculation") \ 183 range(0, max_jint) \ 184 \ 185 experimental(int, RTMAbortRatio, 50, \ 186 "Lock abort ratio at which to stop use RTM lock eliding") \ 187 range(0, 100) /* natural range */ \ 188 \ 189 experimental(int, RTMTotalCountIncrRate, 64, \ 190 "Increment total RTM attempted lock count once every n times") \ 191 range(1, max_jint) \ 192 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 193 \ 194 experimental(intx, RTMLockingCalculationDelay, 0, \ 195 "Number of milliseconds to wait before start calculating aborts " \ 196 "for RTM locking") \ 197 \ 198 experimental(bool, UseRTMXendForLockBusy, true, \ 199 "Use RTM Xend instead of Xabort when lock busy") \ 200 \ 201 /* assembler */ \ 202 product(bool, UseCountLeadingZerosInstruction, false, \ 203 "Use count leading zeros instruction") \ 204 \ 205 product(bool, UseCountTrailingZerosInstruction, false, \ 206 "Use count trailing zeros instruction") \ 207 \ 208 product(bool, UseSSE42Intrinsics, false, \ 209 "SSE4.2 versions of intrinsics") \ 210 \ 211 product(bool, UseBMI1Instructions, false, \ 212 "Use BMI1 instructions") \ 213 \ 214 product(bool, UseBMI2Instructions, false, \ 215 "Use BMI2 instructions") \ 216 \ 217 diagnostic(bool, UseLibmIntrinsic, true, \ 218 "Use Libm Intrinsics") 219 #endif // CPU_X86_GLOBALS_X86_HPP