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 // GC Ergo Flags 71 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 72 73 define_pd_global(uintx, TypeProfileLevel, 111); 74 75 define_pd_global(bool, CompactStrings, true); 76 77 // 2x unrolled loop is shorter with more than 9 HeapWords. 78 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); 79 80 define_pd_global(bool, ThreadLocalHandshakes, true); 81 82 // Platform dependent flag handling: flags only defined on this platform. 83 #define ARCH_FLAGS(develop, \ 84 product, \ 85 diagnostic, \ 86 experimental, \ 87 notproduct, \ 88 range, \ 89 constraint, \ 90 writeable) \ 91 \ 92 product(uintx, PowerArchitecturePPC64, 0, \ 93 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 94 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 95 \ 96 product(bool, SuperwordUseVSX, false, \ 97 "Use Power8 VSX instructions for superword optimization.") \ 98 \ 99 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 100 /* indirect call by a direct call. */ \ 101 product(bool, ReoptimizeCallSequences, true, \ 102 "Reoptimize code-sequences of calls at runtime.") \ 103 \ 104 /* Power 8: Configure Data Stream Control Register. */ \ 105 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 106 "Power8 or later: Specify encoded value for Data Stream Control " \ 107 "Register") \ 108 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 109 "Power8 or later: DPFD (default prefetch depth) value of the " \ 110 "Data Stream Control Register." \ 111 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 112 product(uint64_t,DSCR_URG_PPC64, 8, \ 113 "Power8 or later: URG (depth attainment urgency) value of the " \ 114 "Data Stream Control Register." \ 115 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 116 \ 117 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 118 "Use load instructions for stack banging.") \ 119 \ 120 /* special instructions */ \ 121 \ 122 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 123 "Use count leading zeros instructions.") \ 124 \ 125 product(bool, UseCountTrailingZerosInstructionsPPC64, false, \ 126 "Use count trailing zeros instructions.") \ 127 \ 128 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 129 "Use extended versions of load-and-reserve instructions.") \ 130 \ 131 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 132 "Use rotate and mask instructions.") \ 133 \ 134 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 135 "Use static branch prediction hints in CAS operations.") \ 136 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 137 "Use static branch prediction hints for uncommon paths.") \ 138 \ 139 product(bool, UsePower6SchedulerPPC64, false, \ 140 "Use Power6 Scheduler.") \ 141 \ 142 product(bool, InsertEndGroupPPC64, false, \ 143 "Insert EndGroup instructions to optimize for Power6.") \ 144 \ 145 /* Trap based checks. */ \ 146 /* Trap based checks use the ppc trap instructions to check certain */ \ 147 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 148 /* exception handler of the VM. */ \ 149 product(bool, UseSIGTRAP, true, \ 150 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 151 "switch off all optimizations requiring SIGTRAP.") \ 152 product(bool, TrapBasedICMissChecks, true, \ 153 "Raise and handle SIGTRAP if inline cache miss detected.") \ 154 product(bool, TrapBasedNotEntrantChecks, true, \ 155 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 156 " method.") \ 157 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 158 "handles.") \ 159 \ 160 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 161 " Use this to ease debugging.") \ 162 \ 163 /* Use Restricted Transactional Memory for lock elision */ \ 164 product(bool, UseRTMLocking, false, \ 165 "Enable RTM lock eliding for inflated locks in compiled code") \ 166 \ 167 experimental(bool, UseRTMForStackLocks, false, \ 168 "Enable RTM lock eliding for stack locks in compiled code") \ 169 \ 170 product(bool, UseRTMDeopt, false, \ 171 "Perform deopt and recompilation based on RTM abort ratio") \ 172 \ 173 product(int, RTMRetryCount, 5, \ 174 "Number of RTM retries on lock abort or busy") \ 175 range(0, max_jint) \ 176 \ 177 experimental(int, RTMSpinLoopCount, 100, \ 178 "Spin count for lock to become free before RTM retry") \ 179 range(0, 32767) /* immediate operand limit on ppc */ \ 180 \ 181 experimental(int, RTMAbortThreshold, 1000, \ 182 "Calculate abort ratio after this number of aborts") \ 183 range(0, max_jint) \ 184 \ 185 experimental(int, RTMLockingThreshold, 10000, \ 186 "Lock count at which to do RTM lock eliding without " \ 187 "abort ratio calculation") \ 188 range(0, max_jint) \ 189 \ 190 experimental(int, RTMAbortRatio, 50, \ 191 "Lock abort ratio at which to stop use RTM lock eliding") \ 192 range(0, 100) /* natural range */ \ 193 \ 194 experimental(int, RTMTotalCountIncrRate, 64, \ 195 "Increment total RTM attempted lock count once every n times") \ 196 range(1, 32767) /* immediate operand limit on ppc */ \ 197 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 198 \ 199 experimental(intx, RTMLockingCalculationDelay, 0, \ 200 "Number of milliseconds to wait before start calculating aborts " \ 201 "for RTM locking") \ 202 \ 203 experimental(bool, UseRTMXendForLockBusy, true, \ 204 "Use RTM Xend instead of Xabort when lock busy") \ 205 206 #endif // CPU_PPC_GLOBALS_PPC_HPP