1 /* 2 * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2015 SAP AG. 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, ConvertSleepToYield, true); 36 define_pd_global(bool, ShareVtableStubs, false); // Improves performance markedly for mtrt and compress. 37 define_pd_global(bool, NeedsDeoptSuspend, false); // Only register window machines need this. 38 39 40 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks. 41 define_pd_global(bool, TrapBasedNullChecks, true); 42 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast. 43 44 #define DEFAULT_STACK_YELLOW_PAGES (6) 45 #define DEFAULT_STACK_RED_PAGES (1) 46 #define DEFAULT_STACK_SHADOW_PAGES (6 DEBUG_ONLY(+2)) 47 48 #define MIN_STACK_YELLOW_PAGES (1) 49 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 50 #define MIN_STACK_SHADOW_PAGES (1) 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 56 // Use large code-entry alignment. 57 define_pd_global(intx, CodeEntryAlignment, 128); 58 define_pd_global(intx, OptoLoopAlignment, 16); 59 define_pd_global(intx, InlineFrequencyCount, 100); 60 define_pd_global(intx, InlineSmallCode, 1500); 61 62 // Flags for template interpreter. 63 define_pd_global(bool, RewriteBytecodes, true); 64 define_pd_global(bool, RewriteFrequentPairs, true); 65 66 define_pd_global(bool, UseMembar, false); 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 // No performance work done here yet. 76 define_pd_global(bool, CompactStrings, false); 77 78 // Platform dependent flag handling: flags only defined on this platform. 79 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 80 \ 81 /* Load poll address from thread. This is used to implement per-thread */ \ 82 /* safepoints on platforms != IA64. */ \ 83 product(bool, LoadPollAddressFromThread, false, \ 84 "Load polling page address from thread object (required for " \ 85 "per-thread safepoints on platforms != IA64)") \ 86 \ 87 product(uintx, PowerArchitecturePPC64, 0, \ 88 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 89 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 90 \ 91 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 92 /* indirect call by a direct call. */ \ 93 product(bool, ReoptimizeCallSequences, true, \ 94 "Reoptimize code-sequences of calls at runtime.") \ 95 \ 96 /* Power 8: Configure Data Stream Control Register. */ \ 97 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 98 "Power8 or later: Specify encoded value for Data Stream Control " \ 99 "Register") \ 100 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 101 "Power8 or later: DPFD (default prefetch depth) value of the " \ 102 "Data Stream Control Register." \ 103 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 104 product(uint64_t,DSCR_URG_PPC64, 8, \ 105 "Power8 or later: URG (depth attainment urgency) value of the " \ 106 "Data Stream Control Register." \ 107 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 108 \ 109 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 110 "Use load instructions for stack banging.") \ 111 \ 112 /* special instructions */ \ 113 \ 114 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 115 "Use count leading zeros instructions.") \ 116 \ 117 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 118 "Use extended versions of load-and-reserve instructions.") \ 119 \ 120 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 121 "Use rotate and mask instructions.") \ 122 \ 123 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 124 "Use static branch prediction hints in CAS operations.") \ 125 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 126 "Use static branch prediction hints for uncommon paths.") \ 127 \ 128 product(bool, UsePower6SchedulerPPC64, false, \ 129 "Use Power6 Scheduler.") \ 130 \ 131 product(bool, InsertEndGroupPPC64, false, \ 132 "Insert EndGroup instructions to optimize for Power6.") \ 133 \ 134 /* Trap based checks. */ \ 135 /* Trap based checks use the ppc trap instructions to check certain */ \ 136 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 137 /* exception handler of the VM. */ \ 138 product(bool, UseSIGTRAP, true, \ 139 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 140 "switch off all optimizations requiring SIGTRAP.") \ 141 product(bool, TrapBasedICMissChecks, true, \ 142 "Raise and handle SIGTRAP if inline cache miss detected.") \ 143 product(bool, TrapBasedNotEntrantChecks, true, \ 144 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 145 " method.") \ 146 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 147 "handles.") \ 148 \ 149 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 150 " Use this to ease debugging.") \ 151 \ 152 /* Use Restricted Transactional Memory for lock eliding */ \ 153 product(bool, UseRTMLocking, false, \ 154 "Enable RTM lock eliding for inflated locks in compiled code") \ 155 \ 156 experimental(bool, UseRTMForStackLocks, false, \ 157 "Enable RTM lock eliding for stack locks in compiled code") \ 158 \ 159 product(bool, UseRTMDeopt, false, \ 160 "Perform deopt and recompilation based on RTM abort ratio") \ 161 \ 162 product(uintx, RTMRetryCount, 5, \ 163 "Number of RTM retries on lock abort or busy") \ 164 \ 165 experimental(intx, RTMSpinLoopCount, 100, \ 166 "Spin count for lock to become free before RTM retry") \ 167 \ 168 experimental(intx, RTMAbortThreshold, 1000, \ 169 "Calculate abort ratio after this number of aborts") \ 170 \ 171 experimental(intx, RTMLockingThreshold, 10000, \ 172 "Lock count at which to do RTM lock eliding without " \ 173 "abort ratio calculation") \ 174 \ 175 experimental(intx, RTMAbortRatio, 50, \ 176 "Lock abort ratio at which to stop use RTM lock eliding") \ 177 \ 178 experimental(intx, RTMTotalCountIncrRate, 64, \ 179 "Increment total RTM attempted lock count once every n times") \ 180 \ 181 experimental(intx, RTMLockingCalculationDelay, 0, \ 182 "Number of milliseconds to wait before start calculating aborts " \ 183 "for RTM locking") \ 184 \ 185 experimental(bool, UseRTMXendForLockBusy, true, \ 186 "Use RTM Xend instead of Xabort when lock busy") \ 187 188 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP