1 /* 2 * Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2018 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_PPC_GLOBALS_PPC_HPP 27 #define CPU_PPC_GLOBALS_PPC_HPP 28 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/macros.hpp" 31 32 // Sets the default values for platform dependent flags used by the runtime system. 33 // (see globals.hpp) 34 35 define_pd_global(bool, ShareVtableStubs, true); 36 37 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks. 38 define_pd_global(bool, TrapBasedNullChecks, true); 39 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast. 40 41 #define DEFAULT_STACK_YELLOW_PAGES (2) 42 #define DEFAULT_STACK_RED_PAGES (1) 43 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 44 // stack if compiled for unix and LP64. To pass stack overflow tests we need 45 // 20 shadow pages. 46 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) 47 #define DEFAULT_STACK_RESERVED_PAGES (1) 48 49 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 50 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 51 #define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1)) 52 #define MIN_STACK_RESERVED_PAGES (0) 53 54 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 55 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 56 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 57 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 58 59 // Use large code-entry alignment. 60 define_pd_global(uintx, CodeCacheSegmentSize, 128); 61 define_pd_global(intx, CodeEntryAlignment, 128); 62 define_pd_global(intx, OptoLoopAlignment, 16); 63 define_pd_global(intx, InlineFrequencyCount, 100); 64 define_pd_global(intx, InlineSmallCode, 1500); 65 66 // Flags for template interpreter. 67 define_pd_global(bool, RewriteBytecodes, true); 68 define_pd_global(bool, RewriteFrequentPairs, true); 69 70 define_pd_global(bool, PreserveFramePointer, false); 71 72 // GC Ergo Flags 73 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 74 75 define_pd_global(uintx, TypeProfileLevel, 111); 76 77 define_pd_global(bool, CompactStrings, true); 78 79 // 2x unrolled loop is shorter with more than 9 HeapWords. 80 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); 81 82 define_pd_global(bool, ThreadLocalHandshakes, true); 83 84 // Platform dependent flag handling: flags only defined on this platform. 85 #define ARCH_FLAGS(develop, \ 86 product, \ 87 diagnostic, \ 88 experimental, \ 89 notproduct, \ 90 range, \ 91 constraint, \ 92 writeable) \ 93 \ 94 product(uintx, PowerArchitecturePPC64, 0, \ 95 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 96 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 97 \ 98 product(bool, SuperwordUseVSX, false, \ 99 "Use Power8 VSX instructions for superword optimization.") \ 100 \ 101 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 102 /* indirect call by a direct call. */ \ 103 product(bool, ReoptimizeCallSequences, true, \ 104 "Reoptimize code-sequences of calls at runtime.") \ 105 \ 106 /* Power 8: Configure Data Stream Control Register. */ \ 107 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 108 "Power8 or later: Specify encoded value for Data Stream Control " \ 109 "Register") \ 110 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 111 "Power8 or later: DPFD (default prefetch depth) value of the " \ 112 "Data Stream Control Register." \ 113 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 114 product(uint64_t,DSCR_URG_PPC64, 8, \ 115 "Power8 or later: URG (depth attainment urgency) value of the " \ 116 "Data Stream Control Register." \ 117 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 118 \ 119 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 120 "Use load instructions for stack banging.") \ 121 \ 122 /* special instructions */ \ 123 \ 124 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 125 "Use count leading zeros instructions.") \ 126 \ 127 product(bool, UseCountTrailingZerosInstructionsPPC64, false, \ 128 "Use count trailing zeros instructions.") \ 129 \ 130 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 131 "Use extended versions of load-and-reserve instructions.") \ 132 \ 133 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 134 "Use rotate and mask instructions.") \ 135 \ 136 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 137 "Use static branch prediction hints in CAS operations.") \ 138 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 139 "Use static branch prediction hints for uncommon paths.") \ 140 \ 141 product(bool, UsePower6SchedulerPPC64, false, \ 142 "Use Power6 Scheduler.") \ 143 \ 144 product(bool, InsertEndGroupPPC64, false, \ 145 "Insert EndGroup instructions to optimize for Power6.") \ 146 \ 147 /* Trap based checks. */ \ 148 /* Trap based checks use the ppc trap instructions to check certain */ \ 149 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 150 /* exception handler of the VM. */ \ 151 product(bool, UseSIGTRAP, true, \ 152 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 153 "switch off all optimizations requiring SIGTRAP.") \ 154 product(bool, TrapBasedICMissChecks, true, \ 155 "Raise and handle SIGTRAP if inline cache miss detected.") \ 156 product(bool, TrapBasedNotEntrantChecks, true, \ 157 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 158 " method.") \ 159 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 160 "handles.") \ 161 \ 162 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 163 " Use this to ease debugging.") \ 164 \ 165 /* Use Restricted Transactional Memory for lock elision */ \ 166 product(bool, UseRTMLocking, false, \ 167 "Enable RTM lock eliding for inflated locks in compiled code") \ 168 \ 169 experimental(bool, UseRTMForStackLocks, false, \ 170 "Enable RTM lock eliding for stack locks in compiled code") \ 171 \ 172 product(bool, UseRTMDeopt, false, \ 173 "Perform deopt and recompilation based on RTM abort ratio") \ 174 \ 175 product(int, RTMRetryCount, 5, \ 176 "Number of RTM retries on lock abort or busy") \ 177 range(0, max_jint) \ 178 \ 179 experimental(int, RTMSpinLoopCount, 100, \ 180 "Spin count for lock to become free before RTM retry") \ 181 range(0, 32767) /* immediate operand limit on ppc */ \ 182 \ 183 experimental(int, RTMAbortThreshold, 1000, \ 184 "Calculate abort ratio after this number of aborts") \ 185 range(0, max_jint) \ 186 \ 187 experimental(int, RTMLockingThreshold, 10000, \ 188 "Lock count at which to do RTM lock eliding without " \ 189 "abort ratio calculation") \ 190 range(0, max_jint) \ 191 \ 192 experimental(int, RTMAbortRatio, 50, \ 193 "Lock abort ratio at which to stop use RTM lock eliding") \ 194 range(0, 100) /* natural range */ \ 195 \ 196 experimental(int, RTMTotalCountIncrRate, 64, \ 197 "Increment total RTM attempted lock count once every n times") \ 198 range(1, 32767) /* immediate operand limit on ppc */ \ 199 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 200 \ 201 experimental(intx, RTMLockingCalculationDelay, 0, \ 202 "Number of milliseconds to wait before start calculating aborts " \ 203 "for RTM locking") \ 204 \ 205 experimental(bool, UseRTMXendForLockBusy, true, \ 206 "Use RTM Xend instead of Xabort when lock busy") \ 207 208 #endif // CPU_PPC_GLOBALS_PPC_HPP