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, ImplicitNullChecks, true); // Generate code for implicit null checks. 36 define_pd_global(bool, TrapBasedNullChecks, true); 37 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast. 38 39 #define DEFAULT_STACK_YELLOW_PAGES (2) 40 #define DEFAULT_STACK_RED_PAGES (1) 41 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 42 // stack if compiled for unix and LP64. To pass stack overflow tests we need 43 // 20 shadow pages. 44 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) 45 #define DEFAULT_STACK_RESERVED_PAGES (1) 46 47 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 48 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 49 #define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1)) 50 #define MIN_STACK_RESERVED_PAGES (0) 51 52 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 53 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 54 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 55 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 56 57 // Use large code-entry alignment. 58 define_pd_global(uintx, CodeCacheSegmentSize, 128); 59 define_pd_global(intx, CodeEntryAlignment, 128); 60 define_pd_global(intx, OptoLoopAlignment, 16); 61 define_pd_global(intx, InlineFrequencyCount, 100); 62 define_pd_global(intx, InlineSmallCode, 1500); 63 64 // Flags for template interpreter. 65 define_pd_global(bool, RewriteBytecodes, true); 66 define_pd_global(bool, RewriteFrequentPairs, true); 67 68 define_pd_global(bool, PreserveFramePointer, false); 69 70 define_pd_global(uintx, TypeProfileLevel, 111); 71 72 define_pd_global(bool, CompactStrings, true); 73 74 // 2x unrolled loop is shorter with more than 9 HeapWords. 75 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); 76 77 // ObjectMonitor ref_count not implemented in C2 fast_lock() or 78 // fast_unlock() so use a handshake for safety. 79 define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true); 80 81 // Platform dependent flag handling: flags only defined on this platform. 82 #define ARCH_FLAGS(develop, \ 83 product, \ 84 diagnostic, \ 85 experimental, \ 86 notproduct, \ 87 range, \ 88 constraint, \ 89 writeable) \ 90 \ 91 product(uintx, PowerArchitecturePPC64, 0, \ 92 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 93 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 94 \ 95 product(bool, SuperwordUseVSX, false, \ 96 "Use Power8 VSX instructions for superword optimization.") \ 97 \ 98 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 99 /* indirect call by a direct call. */ \ 100 product(bool, ReoptimizeCallSequences, true, \ 101 "Reoptimize code-sequences of calls at runtime.") \ 102 \ 103 /* Power 8: Configure Data Stream Control Register. */ \ 104 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 105 "Power8 or later: Specify encoded value for Data Stream Control " \ 106 "Register") \ 107 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 108 "Power8 or later: DPFD (default prefetch depth) value of the " \ 109 "Data Stream Control Register." \ 110 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 111 product(uint64_t,DSCR_URG_PPC64, 8, \ 112 "Power8 or later: URG (depth attainment urgency) value of the " \ 113 "Data Stream Control Register." \ 114 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 115 \ 116 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 117 "Use load instructions for stack banging.") \ 118 \ 119 /* special instructions */ \ 120 \ 121 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 122 "Use count leading zeros instructions.") \ 123 \ 124 product(bool, UseCountTrailingZerosInstructionsPPC64, false, \ 125 "Use count trailing zeros instructions.") \ 126 \ 127 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 128 "Use extended versions of load-and-reserve instructions.") \ 129 \ 130 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 131 "Use rotate and mask instructions.") \ 132 \ 133 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 134 "Use static branch prediction hints in CAS operations.") \ 135 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 136 "Use static branch prediction hints for uncommon paths.") \ 137 \ 138 product(bool, UsePower6SchedulerPPC64, false, \ 139 "Use Power6 Scheduler.") \ 140 \ 141 product(bool, InsertEndGroupPPC64, false, \ 142 "Insert EndGroup instructions to optimize for Power6.") \ 143 \ 144 /* Trap based checks. */ \ 145 /* Trap based checks use the ppc trap instructions to check certain */ \ 146 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 147 /* exception handler of the VM. */ \ 148 product(bool, UseSIGTRAP, true, \ 149 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 150 "switch off all optimizations requiring SIGTRAP.") \ 151 product(bool, TrapBasedICMissChecks, true, \ 152 "Raise and handle SIGTRAP if inline cache miss detected.") \ 153 product(bool, TrapBasedNotEntrantChecks, true, \ 154 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 155 " method.") \ 156 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 157 "handles.") \ 158 \ 159 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 160 " Use this to ease debugging.") \ 161 \ 162 /* Use Restricted Transactional Memory for lock elision */ \ 163 product(bool, UseRTMLocking, false, \ 164 "Enable RTM lock eliding for inflated locks in compiled code") \ 165 \ 166 experimental(bool, UseRTMForStackLocks, false, \ 167 "Enable RTM lock eliding for stack locks in compiled code") \ 168 \ 169 product(bool, UseRTMDeopt, false, \ 170 "Perform deopt and recompilation based on RTM abort ratio") \ 171 \ 172 product(int, RTMRetryCount, 5, \ 173 "Number of RTM retries on lock abort or busy") \ 174 range(0, max_jint) \ 175 \ 176 experimental(int, RTMSpinLoopCount, 100, \ 177 "Spin count for lock to become free before RTM retry") \ 178 range(0, 32767) /* immediate operand limit on ppc */ \ 179 \ 180 experimental(int, RTMAbortThreshold, 1000, \ 181 "Calculate abort ratio after this number of aborts") \ 182 range(0, max_jint) \ 183 \ 184 experimental(int, RTMLockingThreshold, 10000, \ 185 "Lock count at which to do RTM lock eliding without " \ 186 "abort ratio calculation") \ 187 range(0, max_jint) \ 188 \ 189 experimental(int, RTMAbortRatio, 50, \ 190 "Lock abort ratio at which to stop use RTM lock eliding") \ 191 range(0, 100) /* natural range */ \ 192 \ 193 experimental(int, RTMTotalCountIncrRate, 64, \ 194 "Increment total RTM attempted lock count once every n times") \ 195 range(1, 32767) /* immediate operand limit on ppc */ \ 196 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 197 \ 198 experimental(intx, RTMLockingCalculationDelay, 0, \ 199 "Number of milliseconds to wait before start calculating aborts " \ 200 "for RTM locking") \ 201 \ 202 experimental(bool, UseRTMXendForLockBusy, true, \ 203 "Use RTM Xend instead of Xabort when lock busy") \ 204 205 #endif // CPU_PPC_GLOBALS_PPC_HPP