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 (6) 44 #define DEFAULT_STACK_RED_PAGES (1) 45 #define DEFAULT_STACK_SHADOW_PAGES (6 DEBUG_ONLY(+2)) 46 #define DEFAULT_STACK_RESERVED_PAGES (0) 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(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, UseMembar, false); 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 // Platform dependent flag handling: flags only defined on this platform. 80 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 81 \ 82 /* Load poll address from thread. This is used to implement per-thread */ \ 83 /* safepoints on platforms != IA64. */ \ 84 product(bool, LoadPollAddressFromThread, false, \ 85 "Load polling page address from thread object (required for " \ 86 "per-thread safepoints on platforms != IA64)") \ 87 \ 88 product(uintx, PowerArchitecturePPC64, 0, \ 89 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 90 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 91 \ 92 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 93 /* indirect call by a direct call. */ \ 94 product(bool, ReoptimizeCallSequences, true, \ 95 "Reoptimize code-sequences of calls at runtime.") \ 96 \ 97 /* Power 8: Configure Data Stream Control Register. */ \ 98 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 99 "Power8 or later: Specify encoded value for Data Stream Control " \ 100 "Register") \ 101 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 102 "Power8 or later: DPFD (default prefetch depth) value of the " \ 103 "Data Stream Control Register." \ 104 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 105 product(uint64_t,DSCR_URG_PPC64, 8, \ 106 "Power8 or later: URG (depth attainment urgency) value of the " \ 107 "Data Stream Control Register." \ 108 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 109 \ 110 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 111 "Use load instructions for stack banging.") \ 112 \ 113 /* special instructions */ \ 114 \ 115 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 116 "Use count leading zeros instructions.") \ 117 \ 118 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 119 "Use extended versions of load-and-reserve instructions.") \ 120 \ 121 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 122 "Use rotate and mask instructions.") \ 123 \ 124 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 125 "Use static branch prediction hints in CAS operations.") \ 126 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 127 "Use static branch prediction hints for uncommon paths.") \ 128 \ 129 product(bool, UsePower6SchedulerPPC64, false, \ 130 "Use Power6 Scheduler.") \ 131 \ 132 product(bool, InsertEndGroupPPC64, false, \ 133 "Insert EndGroup instructions to optimize for Power6.") \ 134 \ 135 /* Trap based checks. */ \ 136 /* Trap based checks use the ppc trap instructions to check certain */ \ 137 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 138 /* exception handler of the VM. */ \ 139 product(bool, UseSIGTRAP, true, \ 140 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 141 "switch off all optimizations requiring SIGTRAP.") \ 142 product(bool, TrapBasedICMissChecks, true, \ 143 "Raise and handle SIGTRAP if inline cache miss detected.") \ 144 product(bool, TrapBasedNotEntrantChecks, true, \ 145 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 146 " method.") \ 147 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 148 "handles.") \ 149 \ 150 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 151 " Use this to ease debugging.") \ 152 \ 153 /* Use Restricted Transactional Memory for lock eliding */ \ 154 product(bool, UseRTMLocking, false, \ 155 "Enable RTM lock eliding for inflated locks in compiled code") \ 156 \ 157 experimental(bool, UseRTMForStackLocks, false, \ 158 "Enable RTM lock eliding for stack locks in compiled code") \ 159 \ 160 product(bool, UseRTMDeopt, false, \ 161 "Perform deopt and recompilation based on RTM abort ratio") \ 162 \ 163 product(uintx, RTMRetryCount, 5, \ 164 "Number of RTM retries on lock abort or busy") \ 165 \ 166 experimental(intx, RTMSpinLoopCount, 100, \ 167 "Spin count for lock to become free before RTM retry") \ 168 \ 169 experimental(intx, RTMAbortThreshold, 1000, \ 170 "Calculate abort ratio after this number of aborts") \ 171 \ 172 experimental(intx, RTMLockingThreshold, 10000, \ 173 "Lock count at which to do RTM lock eliding without " \ 174 "abort ratio calculation") \ 175 \ 176 experimental(intx, RTMAbortRatio, 50, \ 177 "Lock abort ratio at which to stop use RTM lock eliding") \ 178 \ 179 experimental(intx, RTMTotalCountIncrRate, 64, \ 180 "Increment total RTM attempted lock count once every n times") \ 181 \ 182 experimental(intx, RTMLockingCalculationDelay, 0, \ 183 "Number of milliseconds to wait before start calculating aborts " \ 184 "for RTM locking") \ 185 \ 186 experimental(bool, UseRTMXendForLockBusy, true, \ 187 "Use RTM Xend instead of Xabort when lock busy") \ 188 189 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP