1 /* 2 * Copyright (c) 2000, 2018, 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 COMPILER2_OR_JVMCI 50 define_pd_global(intx, CodeEntryAlignment, 32); 51 #else 52 define_pd_global(intx, CodeEntryAlignment, 16); 53 #endif // COMPILER2_OR_JVMCI 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 _LP64 67 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 68 // stack if compiled for unix and LP64. To pass stack overflow tests we need 69 // 20 shadow pages. 70 #define DEFAULT_STACK_SHADOW_PAGES (NOT_WIN64(20) WIN64_ONLY(7) DEBUG_ONLY(+2)) 71 // For those clients that do not use write socket, we allow 72 // the min range value to be below that of the default 73 #define MIN_STACK_SHADOW_PAGES (NOT_WIN64(10) WIN64_ONLY(7) DEBUG_ONLY(+2)) 74 #else 75 #define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5)) 76 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES 77 #endif // _LP64 78 79 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 80 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 81 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 82 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 83 84 define_pd_global(bool, RewriteBytecodes, true); 85 define_pd_global(bool, RewriteFrequentPairs, true); 86 87 define_pd_global(bool, UseMembar, true); 88 89 // GC Ergo Flags 90 define_pd_global(size_t, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread 91 92 define_pd_global(uintx, TypeProfileLevel, 111); 93 94 define_pd_global(bool, CompactStrings, true); 95 96 define_pd_global(bool, PreserveFramePointer, false); 97 98 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong); 99 100 #if defined(_LP64) || defined(_WINDOWS) 101 define_pd_global(bool, ThreadLocalHandshakes, true); 102 #else 103 // get_thread() is slow on linux 32 bit, therefore off by default 104 define_pd_global(bool, ThreadLocalHandshakes, false); 105 #endif 106 107 #define ARCH_FLAGS(develop, \ 108 product, \ 109 diagnostic, \ 110 experimental, \ 111 notproduct, \ 112 range, \ 113 constraint, \ 114 writeable) \ 115 \ 116 develop(bool, IEEEPrecision, true, \ 117 "Enables IEEE precision (for INTEL only)") \ 118 \ 119 product(bool, UseStoreImmI16, true, \ 120 "Use store immediate 16-bits value instruction on x86") \ 121 \ 122 product(intx, UseAVX, 3, \ 123 "Highest supported AVX instructions set on x86/x64") \ 124 range(0, 99) \ 125 \ 126 product(bool, UseCLMUL, false, \ 127 "Control whether CLMUL instructions can be used on x86/x64") \ 128 \ 129 diagnostic(bool, UseIncDec, true, \ 130 "Use INC, DEC instructions on x86") \ 131 \ 132 product(bool, UseNewLongLShift, false, \ 133 "Use optimized bitwise shift left") \ 134 \ 135 product(bool, UseAddressNop, false, \ 136 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 137 \ 138 product(bool, UseXmmLoadAndClearUpper, true, \ 139 "Load low part of XMM register and clear upper part") \ 140 \ 141 product(bool, UseXmmRegToRegMoveAll, false, \ 142 "Copy all XMM register bits when moving value between registers") \ 143 \ 144 product(bool, UseXmmI2D, false, \ 145 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 146 \ 147 product(bool, UseXmmI2F, false, \ 148 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 149 \ 150 product(bool, UseUnalignedLoadStores, false, \ 151 "Use SSE2 MOVDQU instruction for Arraycopy") \ 152 \ 153 product(bool, UseFastStosb, false, \ 154 "Use fast-string operation for zeroing: rep stosb") \ 155 \ 156 /* Use Restricted Transactional Memory for lock eliding */ \ 157 product(bool, UseRTMLocking, false, \ 158 "Enable RTM lock eliding for inflated locks in compiled code") \ 159 \ 160 experimental(bool, UseRTMForStackLocks, false, \ 161 "Enable RTM lock eliding for stack locks in compiled code") \ 162 \ 163 product(bool, UseRTMDeopt, false, \ 164 "Perform deopt and recompilation based on RTM abort ratio") \ 165 \ 166 product(int, RTMRetryCount, 5, \ 167 "Number of RTM retries on lock abort or busy") \ 168 range(0, max_jint) \ 169 \ 170 experimental(int, RTMSpinLoopCount, 100, \ 171 "Spin count for lock to become free before RTM retry") \ 172 range(0, max_jint) \ 173 \ 174 experimental(int, RTMAbortThreshold, 1000, \ 175 "Calculate abort ratio after this number of aborts") \ 176 range(0, max_jint) \ 177 \ 178 experimental(int, RTMLockingThreshold, 10000, \ 179 "Lock count at which to do RTM lock eliding without " \ 180 "abort ratio calculation") \ 181 range(0, max_jint) \ 182 \ 183 experimental(int, RTMAbortRatio, 50, \ 184 "Lock abort ratio at which to stop use RTM lock eliding") \ 185 range(0, 100) /* natural range */ \ 186 \ 187 experimental(int, RTMTotalCountIncrRate, 64, \ 188 "Increment total RTM attempted lock count once every n times") \ 189 range(1, max_jint) \ 190 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 191 \ 192 experimental(intx, RTMLockingCalculationDelay, 0, \ 193 "Number of milliseconds to wait before start calculating aborts " \ 194 "for RTM locking") \ 195 \ 196 experimental(bool, UseRTMXendForLockBusy, true, \ 197 "Use RTM Xend instead of Xabort when lock busy") \ 198 \ 199 /* assembler */ \ 200 product(bool, UseCountLeadingZerosInstruction, false, \ 201 "Use count leading zeros instruction") \ 202 \ 203 product(bool, UseCountTrailingZerosInstruction, false, \ 204 "Use count trailing zeros instruction") \ 205 \ 206 product(bool, UseSSE42Intrinsics, false, \ 207 "SSE4.2 versions of intrinsics") \ 208 \ 209 product(bool, UseBMI1Instructions, false, \ 210 "Use BMI1 instructions") \ 211 \ 212 product(bool, UseBMI2Instructions, false, \ 213 "Use BMI2 instructions") \ 214 \ 215 diagnostic(bool, UseLibmIntrinsic, true, \ 216 "Use Libm Intrinsics") 217 #endif // CPU_X86_VM_GLOBALS_X86_HPP