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comparison: src/cpu/sparc/vm/globals_sparc.hpp
src/cpu/sparc/vm/globals_sparc.hpp
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| 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 |
