1 /* 2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP 26 #define CPU_SPARC_VM_GLOBALS_SPARC_HPP 27 28 #include "utilities/globalDefinitions.hpp" 29 #include "utilities/macros.hpp" 30 31 // Sets the default values for platform dependent flags used by the runtime system. 32 // (see globals.hpp) 33 34 // For sparc we do not do call backs when a thread is in the interpreter, because the 35 // interpreter dispatch needs at least two instructions - first to load the dispatch address 36 // in a register, and second to jmp. The swapping of the dispatch table may occur _after_ 37 // the load of the dispatch address and hence the jmp would still go to the location 38 // according to the prior table. So, we let the thread continue and let it block by itself. 39 define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second 40 define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress 41 define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this 42 43 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 44 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc. 45 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast 46 47 define_pd_global(intx, CodeEntryAlignment, 32); 48 // The default setting 16/16 seems to work best. 49 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.) 50 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize 51 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC 52 define_pd_global(intx, InlineSmallCode, 1500); 53 54 #define DEFAULT_STACK_YELLOW_PAGES (2) 55 #define DEFAULT_STACK_RED_PAGES (1) 56 #define DEFAULT_STACK_RESERVED_PAGES (SOLARIS_ONLY(1) NOT_SOLARIS(0)) 57 58 #ifdef _LP64 59 // Stack slots are 2X larger in LP64 than in the 32 bit VM. 60 define_pd_global(intx, ThreadStackSize, 1024); 61 define_pd_global(intx, VMThreadStackSize, 1024); 62 #define DEFAULT_STACK_SHADOW_PAGES (10 DEBUG_ONLY(+1)) 63 #else 64 define_pd_global(intx, ThreadStackSize, 512); 65 define_pd_global(intx, VMThreadStackSize, 512); 66 #define DEFAULT_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1)) 67 #endif // _LP64 68 69 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 70 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 71 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES 72 #define MIN_STACK_RESERVED_PAGES (0) 73 74 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 75 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 76 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 77 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 78 79 define_pd_global(bool, RewriteBytecodes, true); 80 define_pd_global(bool, RewriteFrequentPairs, true); 81 82 define_pd_global(bool, UseMembar, false); 83 84 define_pd_global(bool, PreserveFramePointer, false); 85 86 // GC Ergo Flags 87 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread 88 89 define_pd_global(uintx, TypeProfileLevel, 111); 90 91 define_pd_global(bool, CompactStrings, true); 92 93 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 94 \ 95 product(intx, UseVIS, 99, \ 96 "Highest supported VIS instructions set on Sparc") \ 97 range(0, 99) \ 98 \ 99 product(bool, UseCBCond, false, \ 100 "Use compare and branch instruction on SPARC") \ 101 \ 102 product(bool, UseBlockZeroing, false, \ 103 "Use special cpu instructions for block zeroing") \ 104 \ 105 product(intx, BlockZeroingLowLimit, 2048, \ 106 "Minimum size in bytes when block zeroing will be used") \ 107 range(1, max_jint) \ 108 \ 109 product(bool, UseBlockCopy, false, \ 110 "Use special cpu instructions for block copy") \ 111 \ 112 product(intx, BlockCopyLowLimit, 2048, \ 113 "Minimum size in bytes when block copy will be used") \ 114 range(1, max_jint) \ 115 \ 116 develop(bool, UseV8InstrsOnly, false, \ 117 "Use SPARC-V8 Compliant instruction subset") \ 118 \ 119 product(bool, UseNiagaraInstrs, false, \ 120 "Use Niagara-efficient instruction subset") \ 121 \ 122 develop(bool, UseCASForSwap, false, \ 123 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 124 \ 125 product(uintx, ArraycopySrcPrefetchDistance, 0, \ 126 "Distance to prefetch source array in arraycopy") \ 127 constraint(ArraycopySrcPrefetchDistanceConstraintFunc, AfterErgo) \ 128 \ 129 product(uintx, ArraycopyDstPrefetchDistance, 0, \ 130 "Distance to prefetch destination array in arraycopy") \ 131 constraint(ArraycopyDstPrefetchDistanceConstraintFunc, AfterErgo) \ 132 133 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP