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 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the 46 // stack if compiled for unix and LP64. To pass stack overflow tests we need 47 // 20 shadow pages. 48 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) 49 #define DEFAULT_STACK_RESERVED_PAGES (1) 50 51 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 52 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 53 #define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1)) 54 #define MIN_STACK_RESERVED_PAGES (0) 55 56 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 57 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 58 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 59 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 60 61 // Use large code-entry alignment. 62 define_pd_global(uintx, CodeCacheSegmentSize, 128); 63 define_pd_global(intx, CodeEntryAlignment, 128); 64 define_pd_global(intx, OptoLoopAlignment, 16); 65 define_pd_global(intx, InlineFrequencyCount, 100); 66 define_pd_global(intx, InlineSmallCode, 1500); 67 68 // Flags for template interpreter. 69 define_pd_global(bool, RewriteBytecodes, true); 70 define_pd_global(bool, RewriteFrequentPairs, true); 71 72 define_pd_global(bool, UseMembar, false); 73 74 define_pd_global(bool, PreserveFramePointer, false); 75 76 define_pd_global(bool, ValueTypePassFieldsAsArgs, false); 77 78 // GC Ergo Flags 79 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 80 81 define_pd_global(uintx, TypeProfileLevel, 111); 82 83 define_pd_global(bool, CompactStrings, true); 84 85 // 2x unrolled loop is shorter with more than 9 HeapWords. 86 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); 87 88 // Platform dependent flag handling: flags only defined on this platform. 89 #define ARCH_FLAGS(develop, \ 90 product, \ 91 diagnostic, \ 92 experimental, \ 93 notproduct, \ 94 range, \ 95 constraint, \ 96 writeable) \ 97 \ 98 /* Load poll address from thread. This is used to implement per-thread */ \ 99 /* safepoints on platforms != IA64. */ \ 100 product(bool, LoadPollAddressFromThread, false, \ 101 "Load polling page address from thread object (required for " \ 102 "per-thread safepoints on platforms != IA64)") \ 103 \ 104 product(uintx, PowerArchitecturePPC64, 0, \ 105 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 106 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 107 \ 108 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 109 /* indirect call by a direct call. */ \ 110 product(bool, ReoptimizeCallSequences, true, \ 111 "Reoptimize code-sequences of calls at runtime.") \ 112 \ 113 /* Power 8: Configure Data Stream Control Register. */ \ 114 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 115 "Power8 or later: Specify encoded value for Data Stream Control " \ 116 "Register") \ 117 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 118 "Power8 or later: DPFD (default prefetch depth) value of the " \ 119 "Data Stream Control Register." \ 120 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 121 product(uint64_t,DSCR_URG_PPC64, 8, \ 122 "Power8 or later: URG (depth attainment urgency) value of the " \ 123 "Data Stream Control Register." \ 124 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 125 \ 126 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 127 "Use load instructions for stack banging.") \ 128 \ 129 /* special instructions */ \ 130 \ 131 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 132 "Use count leading zeros instructions.") \ 133 \ 134 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 135 "Use extended versions of load-and-reserve instructions.") \ 136 \ 137 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 138 "Use rotate and mask instructions.") \ 139 \ 140 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 141 "Use static branch prediction hints in CAS operations.") \ 142 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 143 "Use static branch prediction hints for uncommon paths.") \ 144 \ 145 product(bool, UsePower6SchedulerPPC64, false, \ 146 "Use Power6 Scheduler.") \ 147 \ 148 product(bool, InsertEndGroupPPC64, false, \ 149 "Insert EndGroup instructions to optimize for Power6.") \ 150 \ 151 /* Trap based checks. */ \ 152 /* Trap based checks use the ppc trap instructions to check certain */ \ 153 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 154 /* exception handler of the VM. */ \ 155 product(bool, UseSIGTRAP, true, \ 156 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 157 "switch off all optimizations requiring SIGTRAP.") \ 158 product(bool, TrapBasedICMissChecks, true, \ 159 "Raise and handle SIGTRAP if inline cache miss detected.") \ 160 product(bool, TrapBasedNotEntrantChecks, true, \ 161 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 162 " method.") \ 163 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 164 "handles.") \ 165 \ 166 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 167 " Use this to ease debugging.") \ 168 \ 169 /* Use Restricted Transactional Memory for lock eliding */ \ 170 product(bool, UseRTMLocking, false, \ 171 "Enable RTM lock eliding for inflated locks in compiled code") \ 172 \ 173 experimental(bool, UseRTMForStackLocks, false, \ 174 "Enable RTM lock eliding for stack locks in compiled code") \ 175 \ 176 product(bool, UseRTMDeopt, false, \ 177 "Perform deopt and recompilation based on RTM abort ratio") \ 178 \ 179 product(uintx, RTMRetryCount, 5, \ 180 "Number of RTM retries on lock abort or busy") \ 181 \ 182 experimental(intx, RTMSpinLoopCount, 100, \ 183 "Spin count for lock to become free before RTM retry") \ 184 \ 185 experimental(intx, RTMAbortThreshold, 1000, \ 186 "Calculate abort ratio after this number of aborts") \ 187 \ 188 experimental(intx, RTMLockingThreshold, 10000, \ 189 "Lock count at which to do RTM lock eliding without " \ 190 "abort ratio calculation") \ 191 \ 192 experimental(intx, RTMAbortRatio, 50, \ 193 "Lock abort ratio at which to stop use RTM lock eliding") \ 194 \ 195 experimental(intx, RTMTotalCountIncrRate, 64, \ 196 "Increment total RTM attempted lock count once every n times") \ 197 \ 198 experimental(intx, RTMLockingCalculationDelay, 0, \ 199 "Number of milliseconds to wait before start calculating aborts " \ 200 "for RTM locking") \ 201 \ 202 experimental(bool, UseRTMXendForLockBusy, true, \ 203 "Use RTM Xend instead of Xabort when lock busy") \ 204 205 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP