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, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast. 42 43 // Use large code-entry alignment. 44 define_pd_global(intx, CodeEntryAlignment, 128); 45 define_pd_global(intx, OptoLoopAlignment, 16); 46 define_pd_global(intx, InlineFrequencyCount, 100); 47 define_pd_global(intx, InlineSmallCode, 1500); 48 49 define_pd_global(intx, PreInflateSpin, 10); 50 51 // Flags for template interpreter. 52 define_pd_global(bool, RewriteBytecodes, true); 53 define_pd_global(bool, RewriteFrequentPairs, true); 54 55 define_pd_global(bool, UseMembar, false); 56 57 // GC Ergo Flags 58 define_pd_global(intx, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. 59 60 61 // Platform dependent flag handling: flags only defined on this platform. 62 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ 63 product(uintx, PowerArchitecturePPC64, 0, \ 64 "CPU Version: x for PowerX. Currently recognizes Power5 to " \ 65 "Power7. Default is 0. CPUs newer than Power7 will be " \ 66 "recognized as Power7.") \ 67 \ 68 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ 69 /* indirect call by a direct call. */ \ 70 product(bool, ReoptimizeCallSequences, true, \ 71 "Reoptimize code-sequences of calls at runtime.") \ 72 \ 73 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ 74 "Use load instructions for stack banging.") \ 75 \ 76 /* special instructions */ \ 77 \ 78 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ 79 "Use count leading zeros instructions.") \ 80 \ 81 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ 82 "Use extended versions of load-and-reserve instructions.") \ 83 \ 84 product(bool, UseRotateAndMaskInstructionsPPC64, true, \ 85 "Use rotate and mask instructions.") \ 86 \ 87 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ 88 "Use static branch prediction hints in CAS operations.") \ 89 \ 90 /* Trap based checks. */ \ 91 /* Trap based checks use the ppc trap instructions to check certain */ \ 92 /* conditions. This instruction raises a SIGTRAP caught by the */ \ 93 /* exception handler of the VM. */ \ 94 product(bool, UseSIGTRAP, false, \ 95 "Allow trap instructions that make use of SIGTRAP. Use this to " \ 96 "switch off all optimizations requiring SIGTRAP.") \ 97 product(bool, TrapBasedICMissChecks, true, \ 98 "Raise and handle SIGTRAP if inline cache miss detected.") \ 99 product(bool, TrapBasedNotEntrantChecks, true, \ 100 "Raise and handle SIGTRAP if calling not entrant or zombie" \ 101 " method.") \ 102 product(bool, TrapBasedNullChecks, true, \ 103 "Generate code for null checks that uses a cmp and trap " \ 104 "instruction raising SIGTRAP. This is only used if an access to" \ 105 "null (+offset) will not raise a SIGSEGV.") \ 106 product(bool, TrapBasedRangeChecks, true, \ 107 "Raise and handle SIGTRAP if array out of bounds check fails.") \ 108 product(bool, TraceTraps, false, "Trace all traps the signal handler" \ 109 "handles.") \ 110 \ 111 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ 112 " Use this to ease debugging.") \ 113 114 115 116 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP