1 /* 2 * Copyright (c) 2000, 2017, 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, NeedsDeoptSuspend, true); // register window machines need this 41 42 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 43 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc. 44 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast 45 46 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment. 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 define_pd_global(intx, CompilerThreadStackSize, 1024); 59 define_pd_global(intx, ThreadStackSize, 1024); 60 define_pd_global(intx, VMThreadStackSize, 1024); 61 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) 62 63 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES 64 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES 65 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES 66 #define MIN_STACK_RESERVED_PAGES (0) 67 68 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 69 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 70 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 71 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 72 73 define_pd_global(bool, RewriteBytecodes, true); 74 define_pd_global(bool, RewriteFrequentPairs, true); 75 76 define_pd_global(bool, UseMembar, true); 77 78 define_pd_global(bool, PreserveFramePointer, false); 79 80 // GC Ergo Flags 81 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread 82 83 define_pd_global(uintx, TypeProfileLevel, 111); 84 85 define_pd_global(bool, CompactStrings, true); 86 87 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong); 88 89 define_pd_global(bool, ThreadLocalHandshakes, true); 90 91 #define ARCH_FLAGS(develop, \ 92 product, \ 93 diagnostic, \ 94 experimental, \ 95 notproduct, \ 96 range, \ 97 constraint, \ 98 writeable) \ 99 \ 100 product(intx, UseVIS, 99, \ 101 "Highest supported VIS instructions set on SPARC") \ 102 range(0, 99) \ 103 \ 104 product(bool, UseCBCond, false, \ 105 "Use compare and branch instruction on SPARC") \ 106 \ 107 product(bool, UseMPMUL, false, \ 108 "Use multi-precision multiply instruction (mpmul) on SPARC") \ 109 \ 110 product(bool, UseBlockZeroing, false, \ 111 "Use special cpu instructions for block zeroing") \ 112 \ 113 product(intx, BlockZeroingLowLimit, 2048, \ 114 "Minimum size in bytes when block zeroing will be used") \ 115 range(1, max_jint) \ 116 \ 117 product(bool, UseBlockCopy, false, \ 118 "Use special cpu instructions for block copy") \ 119 \ 120 product(intx, BlockCopyLowLimit, 2048, \ 121 "Minimum size in bytes when block copy will be used") \ 122 range(1, max_jint) \ 123 \ 124 product(bool, UseNiagaraInstrs, false, \ 125 "Use Niagara-efficient instruction subset") \ 126 \ 127 develop(bool, UseCASForSwap, false, \ 128 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 129 \ 130 product(uintx, ArraycopySrcPrefetchDistance, 0, \ 131 "Distance to prefetch source array in arraycopy") \ 132 constraint(ArraycopySrcPrefetchDistanceConstraintFunc, AfterErgo) \ 133 \ 134 product(uintx, ArraycopyDstPrefetchDistance, 0, \ 135 "Distance to prefetch destination array in arraycopy") \ 136 constraint(ArraycopyDstPrefetchDistanceConstraintFunc, AfterErgo) \ 137 138 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP 139