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 // Use large code-entry alignment. 45 define_pd_global(intx, CodeEntryAlignment, 128); 46 define_pd_global(intx, OptoLoopAlignment, 16); 47 define_pd_global(intx, InlineFrequencyCount, 100); 48 define_pd_global(intx, InlineSmallCode, 1500); 49 50 define_pd_global(intx, PreInflateSpin, 10); 51 52 // Flags for template interpreter. 53 define_pd_global(bool, RewriteBytecodes, true); 54 define_pd_global(bool, RewriteFrequentPairs, true); 55 56 define_pd_global(bool, UseMembar, false); 57 58 // GC Ergo Flags 59 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 60 61 define_pd_global(uintx, TypeProfileLevel, 111); 62 63 // Platform dependent flag handling: flags only defined on this platform. 64 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ 65 \ 66 /* Load poll address from thread. This is used to implement per-thread */ \ 67 /* safepoints on platforms != IA64. */ \ 68 product(bool, LoadPollAddressFromThread, false, \ 69 "Load polling page address from thread object (required for " \ 70 "per-thread safepoints on platforms != IA64)") \ 71 \ 72 product(uintx, PowerArchitecturePPC64, 0, \ 73 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 74 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 75 \ 76 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 77 /* indirect call by a direct call. */ \ 78 product(bool, ReoptimizeCallSequences, true, \ 79 "Reoptimize code-sequences of calls at runtime.") \ 80 \ 81 /* Power 8: Configure Data Stream Control Register. */ \ 82 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 83 "Power8 or later: Specify encoded value for Data Stream Control " \ 84 "Register") \ 85 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 86 "Power8 or later: DPFD (default prefetch depth) value of the " \ 87 "Data Stream Control Register." \ 88 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 89 product(uint64_t,DSCR_URG_PPC64, 8, \ 90 "Power8 or later: URG (depth attainment urgency) value of the " \ 91 "Data Stream Control Register." \ 92 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 93 \ 94 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 95 "Use load instructions for stack banging.") \ 96 \ 97 /* special instructions */ \ 98 \ 99 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 100 "Use count leading zeros instructions.") \ 101 \ 102 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 103 "Use extended versions of load-and-reserve instructions.") \ 104 \ 105 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 106 "Use rotate and mask instructions.") \ 107 \ 108 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 109 "Use static branch prediction hints in CAS operations.") \ 110 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 111 "Use static branch prediction hints for uncommon paths.") \ 112 \ 113 product(bool, UsePower6SchedulerPPC64, false, \ 114 "Use Power6 Scheduler.") \ 115 \ 116 product(bool, InsertEndGroupPPC64, false, \ 117 "Insert EndGroup instructions to optimize for Power6.") \ 118 \ 119 /* Trap based checks. */ \ 120 /* Trap based checks use the ppc trap instructions to check certain */ \ 121 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 122 /* exception handler of the VM. */ \ 123 product(bool, UseSIGTRAP, true, \ 124 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 125 "switch off all optimizations requiring SIGTRAP.") \ 126 product(bool, TrapBasedICMissChecks, true, \ 127 "Raise and handle SIGTRAP if inline cache miss detected.") \ 128 product(bool, TrapBasedNotEntrantChecks, true, \ 129 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 130 " method.") \ 131 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 132 "handles.") \ 133 \ 134 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 135 " Use this to ease debugging.") \ 136 \ 137 /* Use Restricted Transactional Memory for lock eliding */ \ 138 product(bool, UseRTMLocking, false, \ 139 "Enable RTM lock eliding for inflated locks in compiled code") \ 140 \ 141 experimental(bool, UseRTMForStackLocks, false, \ 142 "Enable RTM lock eliding for stack locks in compiled code") \ 143 \ 144 product(bool, UseRTMDeopt, false, \ 145 "Perform deopt and recompilation based on RTM abort ratio") \ 146 \ 147 product(uintx, RTMRetryCount, 5, \ 148 "Number of RTM retries on lock abort or busy") \ 149 \ 150 experimental(intx, RTMSpinLoopCount, 100, \ 151 "Spin count for lock to become free before RTM retry") \ 152 \ 153 experimental(intx, RTMAbortThreshold, 1000, \ 154 "Calculate abort ratio after this number of aborts") \ 155 \ 156 experimental(intx, RTMLockingThreshold, 10000, \ 157 "Lock count at which to do RTM lock eliding without " \ 158 "abort ratio calculation") \ 159 \ 160 experimental(intx, RTMAbortRatio, 50, \ 161 "Lock abort ratio at which to stop use RTM lock eliding") \ 162 \ 163 experimental(intx, RTMTotalCountIncrRate, 64, \ 164 "Increment total RTM attempted lock count once every n times") \ 165 \ 166 experimental(intx, RTMLockingCalculationDelay, 0, \ 167 "Number of milliseconds to wait before start calculating aborts " \ 168 "for RTM locking") \ 169 \ 170 experimental(bool, UseRTMXendForLockBusy, true, \ 171 "Use RTM Xend instead of Xabort when lock busy") \ 172 173 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP