1 /* 2 * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2017 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 // GC Ergo Flags 77 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 78 79 define_pd_global(uintx, TypeProfileLevel, 111); 80 81 define_pd_global(bool, CompactStrings, true); 82 83 // 2x unrolled loop is shorter with more than 9 HeapWords. 84 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); 85 86 // Platform dependent flag handling: flags only defined on this platform. 87 #define ARCH_FLAGS(develop, \ 88 product, \ 89 diagnostic, \ 90 experimental, \ 91 notproduct, \ 92 range, \ 93 constraint, \ 94 writeable) \ 95 \ 96 /* Load poll address from thread. This is used to implement per-thread */ \ 97 /* safepoints on platforms != IA64. */ \ 98 product(bool, LoadPollAddressFromThread, false, \ 99 "Load polling page address from thread object (required for " \ 100 "per-thread safepoints on platforms != IA64)") \ 101 \ 102 product(uintx, PowerArchitecturePPC64, 0, \ 103 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 104 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ 105 \ 106 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 107 /* indirect call by a direct call. */ \ 108 product(bool, ReoptimizeCallSequences, true, \ 109 "Reoptimize code-sequences of calls at runtime.") \ 110 \ 111 /* Power 8: Configure Data Stream Control Register. */ \ 112 product(uint64_t,DSCR_PPC64, (uintx)-1, \ 113 "Power8 or later: Specify encoded value for Data Stream Control " \ 114 "Register") \ 115 product(uint64_t,DSCR_DPFD_PPC64, 8, \ 116 "Power8 or later: DPFD (default prefetch depth) value of the " \ 117 "Data Stream Control Register." \ 118 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 119 product(uint64_t,DSCR_URG_PPC64, 8, \ 120 "Power8 or later: URG (depth attainment urgency) value of the " \ 121 "Data Stream Control Register." \ 122 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ 123 \ 124 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 125 "Use load instructions for stack banging.") \ 126 \ 127 /* special instructions */ \ 128 \ 129 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 130 "Use count leading zeros instructions.") \ 131 \ 132 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 133 "Use extended versions of load-and-reserve instructions.") \ 134 \ 135 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 136 "Use rotate and mask instructions.") \ 137 \ 138 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 139 "Use static branch prediction hints in CAS operations.") \ 140 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 141 "Use static branch prediction hints for uncommon paths.") \ 142 \ 143 product(bool, UsePower6SchedulerPPC64, false, \ 144 "Use Power6 Scheduler.") \ 145 \ 146 product(bool, InsertEndGroupPPC64, false, \ 147 "Insert EndGroup instructions to optimize for Power6.") \ 148 \ 149 /* Trap based checks. */ \ 150 /* Trap based checks use the ppc trap instructions to check certain */ \ 151 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 152 /* exception handler of the VM. */ \ 153 product(bool, UseSIGTRAP, true, \ 154 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 155 "switch off all optimizations requiring SIGTRAP.") \ 156 product(bool, TrapBasedICMissChecks, true, \ 157 "Raise and handle SIGTRAP if inline cache miss detected.") \ 158 product(bool, TrapBasedNotEntrantChecks, true, \ 159 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 160 " method.") \ 161 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 162 "handles.") \ 163 \ 164 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 165 " Use this to ease debugging.") \ 166 \ 167 /* Use Restricted Transactional Memory for lock elision */ \ 168 product(bool, UseRTMLocking, false, \ 169 "Enable RTM lock eliding for inflated locks in compiled code") \ 170 \ 171 experimental(bool, UseRTMForStackLocks, false, \ 172 "Enable RTM lock eliding for stack locks in compiled code") \ 173 \ 174 product(bool, UseRTMDeopt, false, \ 175 "Perform deopt and recompilation based on RTM abort ratio") \ 176 \ 177 product(int, RTMRetryCount, 5, \ 178 "Number of RTM retries on lock abort or busy") \ 179 range(0, max_jint) \ 180 \ 181 experimental(int, RTMSpinLoopCount, 100, \ 182 "Spin count for lock to become free before RTM retry") \ 183 range(0, 32767) /* immediate operand limit on ppc */ \ 184 \ 185 experimental(int, RTMAbortThreshold, 1000, \ 186 "Calculate abort ratio after this number of aborts") \ 187 range(0, max_jint) \ 188 \ 189 experimental(int, RTMLockingThreshold, 10000, \ 190 "Lock count at which to do RTM lock eliding without " \ 191 "abort ratio calculation") \ 192 range(0, max_jint) \ 193 \ 194 experimental(int, RTMAbortRatio, 50, \ 195 "Lock abort ratio at which to stop use RTM lock eliding") \ 196 range(0, 100) /* natural range */ \ 197 \ 198 experimental(int, RTMTotalCountIncrRate, 64, \ 199 "Increment total RTM attempted lock count once every n times") \ 200 range(1, 32767) /* immediate operand limit on ppc */ \ 201 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ 202 \ 203 experimental(intx, RTMLockingCalculationDelay, 0, \ 204 "Number of milliseconds to wait before start calculating aborts " \ 205 "for RTM locking") \ 206 \ 207 experimental(bool, UseRTMXendForLockBusy, true, \ 208 "Use RTM Xend instead of Xabort when lock busy") \ 209 210 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP