1 /* 2 * Copyright (c) 2000, 2013, 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, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI 41 define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress 42 define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter 43 define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this 44 45 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 46 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc. 47 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast 48 49 define_pd_global(intx, CodeEntryAlignment, 32); 50 // The default setting 16/16 seems to work best. 51 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.) 52 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize 53 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC 54 define_pd_global(intx, InlineSmallCode, 1500); 55 56 #ifdef _LP64 57 // Stack slots are 2X larger in LP64 than in the 32 bit VM. 58 define_pd_global(intx, ThreadStackSize, 1024); 59 define_pd_global(intx, VMThreadStackSize, 1024); 60 define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1)); 61 #else 62 define_pd_global(intx, ThreadStackSize, 512); 63 define_pd_global(intx, VMThreadStackSize, 512); 64 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1)); 65 #endif 66 67 define_pd_global(intx, StackYellowPages, 2); 68 define_pd_global(intx, StackRedPages, 1); 69 70 define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center 71 72 define_pd_global(bool, RewriteBytecodes, true); 73 define_pd_global(bool, RewriteFrequentPairs, true); 74 75 define_pd_global(bool, UseMembar, false); 76 77 // GC Ergo Flags 78 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread 79 80 define_pd_global(uintx, TypeProfileLevel, 0); 81 82 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ 83 \ 84 product(intx, UseVIS, 99, \ 85 "Highest supported VIS instructions set on Sparc") \ 86 \ 87 product(bool, UseCBCond, false, \ 88 "Use compare and branch instruction on SPARC") \ 89 \ 90 product(bool, UseBlockZeroing, false, \ 91 "Use special cpu instructions for block zeroing") \ 92 \ 93 product(intx, BlockZeroingLowLimit, 2048, \ 94 "Minimum size in bytes when block zeroing will be used") \ 95 \ 96 product(bool, UseBlockCopy, false, \ 97 "Use special cpu instructions for block copy") \ 98 \ 99 product(intx, BlockCopyLowLimit, 2048, \ 100 "Minimum size in bytes when block copy will be used") \ 101 \ 102 develop(bool, UseV8InstrsOnly, false, \ 103 "Use SPARC-V8 Compliant instruction subset") \ 104 \ 105 product(bool, UseNiagaraInstrs, false, \ 106 "Use Niagara-efficient instruction subset") \ 107 \ 108 develop(bool, UseCASForSwap, false, \ 109 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 110 \ 111 product(uintx, ArraycopySrcPrefetchDistance, 0, \ 112 "Distance to prefetch source array in arracopy") \ 113 \ 114 product(uintx, ArraycopyDstPrefetchDistance, 0, \ 115 "Distance to prefetch destination array in arracopy") \ 116 117 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP