1 /* 2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2013 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 define_pd_global(bool, PreserveFramePointer, false); 59 60 // GC Ergo Flags 61 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 62 63 define_pd_global(uintx, TypeProfileLevel, 0); 64 65 // Platform dependent flag handling: flags only defined on this platform. 66 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ 67 \ 68 /* Load poll address from thread. This is used to implement per-thread */ \ 69 /* safepoints on platforms != IA64. */ \ 70 product(bool, LoadPollAddressFromThread, false, \ 71 "Load polling page address from thread object (required for " \ 72 "per-thread safepoints on platforms != IA64)") \ 73 \ 74 product(uintx, PowerArchitecturePPC64, 0, \ 75 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 76 "Power7. Default is 0. CPUs newer than Power7 will be " \ 77 "recognized as Power7.") \ 78 \ 79 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 80 /* indirect call by a direct call. */ \ 81 product(bool, ReoptimizeCallSequences, true, \ 82 "Reoptimize code-sequences of calls at runtime.") \ 83 \ 84 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 85 "Use load instructions for stack banging.") \ 86 \ 87 /* special instructions */ \ 88 \ 89 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 90 "Use count leading zeros instructions.") \ 91 \ 92 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 93 "Use extended versions of load-and-reserve instructions.") \ 94 \ 95 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 96 "Use rotate and mask instructions.") \ 97 \ 98 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 99 "Use static branch prediction hints in CAS operations.") \ 100 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ 101 "Use static branch prediction hints for uncommon paths.") \ 102 \ 103 product(bool, UsePower6SchedulerPPC64, false, \ 104 "Use Power6 Scheduler.") \ 105 \ 106 product(bool, InsertEndGroupPPC64, false, \ 107 "Insert EndGroup instructions to optimize for Power6.") \ 108 \ 109 /* Trap based checks. */ \ 110 /* Trap based checks use the ppc trap instructions to check certain */ \ 111 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 112 /* exception handler of the VM. */ \ 113 product(bool, UseSIGTRAP, true, \ 114 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 115 "switch off all optimizations requiring SIGTRAP.") \ 116 product(bool, TrapBasedICMissChecks, true, \ 117 "Raise and handle SIGTRAP if inline cache miss detected.") \ 118 product(bool, TrapBasedNotEntrantChecks, true, \ 119 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 120 " method.") \ 121 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 122 "handles.") \ 123 \ 124 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 125 " Use this to ease debugging.") \ 126 127 128 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP