1 /* 2 * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2016 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_VM_GLOBALS_PPC_HPP 27 #define CPU_PPC_VM_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, false); // Improves performance markedly for mtrt and compress. 36 define_pd_global(bool, NeedsDeoptSuspend, false); // Only register window machines need this. 37 38 39 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks. 40 define_pd_global(bool, TrapBasedNullChecks, true); 41 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast. 42 43 #define DEFAULT_STACK_YELLOW_PAGES (2) 44 #define DEFAULT_STACK_RED_PAGES (1) 45 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) 46 #define DEFAULT_STACK_RESERVED_PAGES (1) 47 48 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 49 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 50 #define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1)) 51 #define MIN_STACK_RESERVED_PAGES (0) 52 53 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 54 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 55 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 56 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 57 58 // Use large code-entry alignment. 59 define_pd_global(uintx, CodeCacheSegmentSize, 128); 60 define_pd_global(intx, CodeEntryAlignment, 128); 61 define_pd_global(intx, OptoLoopAlignment, 16); 62 define_pd_global(intx, InlineFrequencyCount, 100); 63 define_pd_global(intx, InlineSmallCode, 1500); 64 65 // Flags for template interpreter. 66 define_pd_global(bool, RewriteBytecodes, true); 67 define_pd_global(bool, RewriteFrequentPairs, true); 68 69 define_pd_global(bool, UseMembar, false); 70 71 define_pd_global(bool, PreserveFramePointer, false); 72 73 // GC Ergo Flags 74 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 75 76 define_pd_global(uintx, TypeProfileLevel, 111); 77 78 define_pd_global(bool, CompactStrings, true); 79 80 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong); 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 /* Load poll address from thread. This is used to implement per-thread */ \ 93 /* safepoints on platforms != IA64. */ \ 94 product(bool, LoadPollAddressFromThread, false, \ 95 "Load polling page address from thread object (required for " \ 96 "per-thread safepoints on platforms != IA64)") \ 97 \ 98 product(uintx, PowerArchitecturePPC64, 0, \ 99 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 100 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 101 \ 102 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 103 /* indirect call by a direct call. */ \ 104 product(bool, ReoptimizeCallSequences, true, \ 105 "Reoptimize code-sequences of calls at runtime.") \ 106 \ 107 /* Power 8: Configure Data Stream Control Register. */ \ 108 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 109 "Power8 or later: Specify encoded value for Data Stream Control " \ 110 "Register") \ 111 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 112 "Power8 or later: DPFD (default prefetch depth) value of the " \ 113 "Data Stream Control Register." \ 114 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 115 product(uint64_t,DSCR_URG_PPC64, 8, \ 116 "Power8 or later: URG (depth attainment urgency) value of the " \ 117 "Data Stream Control Register." \ 118 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 119 \ 120 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 121 "Use load instructions for stack banging.") \ 122 \ 123 /* special instructions */ \ 124 \ 125 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 126 "Use count leading 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 eliding */ \ 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(uintx, RTMRetryCount, 5, \ 174 "Number of RTM retries on lock abort or busy") \ 175 \ 176 experimental(intx, RTMSpinLoopCount, 100, \ 177 "Spin count for lock to become free before RTM retry") \ 178 \ 179 experimental(intx, RTMAbortThreshold, 1000, \ 180 "Calculate abort ratio after this number of aborts") \ 181 \ 182 experimental(intx, RTMLockingThreshold, 10000, \ 183 "Lock count at which to do RTM lock eliding without " \ 184 "abort ratio calculation") \ 185 \ 186 experimental(intx, RTMAbortRatio, 50, \ 187 "Lock abort ratio at which to stop use RTM lock eliding") \ 188 \ 189 experimental(intx, RTMTotalCountIncrRate, 64, \ 190 "Increment total RTM attempted lock count once every n times") \ 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 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP