globals_sparc.hpp revision 8569:5bbf25472731
1/* 2 * Copyright (c) 2000, 2015, 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. 39define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second 40define_pd_global(bool, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI 41define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress 42define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter 43define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this 44 45define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 46define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc. 47define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast 48 49define_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.) 52define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize 53define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC 54define_pd_global(intx, InlineSmallCode, 1500); 55 56#ifdef _LP64 57// Stack slots are 2X larger in LP64 than in the 32 bit VM. 58define_pd_global(intx, ThreadStackSize, 1024); 59define_pd_global(intx, VMThreadStackSize, 1024); 60define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1)); 61#else 62define_pd_global(intx, ThreadStackSize, 512); 63define_pd_global(intx, VMThreadStackSize, 512); 64define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1)); 65#endif 66 67define_pd_global(intx, StackYellowPages, 2); 68define_pd_global(intx, StackRedPages, 1); 69 70define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center 71 72define_pd_global(bool, RewriteBytecodes, true); 73define_pd_global(bool, RewriteFrequentPairs, true); 74 75define_pd_global(bool, UseMembar, false); 76 77define_pd_global(bool, PreserveFramePointer, false); 78 79// GC Ergo Flags 80define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread 81 82define_pd_global(uintx, TypeProfileLevel, 111); 83 84#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 85 \ 86 product(intx, UseVIS, 99, \ 87 "Highest supported VIS instructions set on Sparc") \ 88 \ 89 product(bool, UseCBCond, false, \ 90 "Use compare and branch instruction on SPARC") \ 91 \ 92 product(bool, UseBlockZeroing, false, \ 93 "Use special cpu instructions for block zeroing") \ 94 \ 95 product(intx, BlockZeroingLowLimit, 2048, \ 96 "Minimum size in bytes when block zeroing will be used") \ 97 \ 98 product(bool, UseBlockCopy, false, \ 99 "Use special cpu instructions for block copy") \ 100 \ 101 product(intx, BlockCopyLowLimit, 2048, \ 102 "Minimum size in bytes when block copy will be used") \ 103 \ 104 develop(bool, UseV8InstrsOnly, false, \ 105 "Use SPARC-V8 Compliant instruction subset") \ 106 \ 107 product(bool, UseNiagaraInstrs, false, \ 108 "Use Niagara-efficient instruction subset") \ 109 \ 110 develop(bool, UseCASForSwap, false, \ 111 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 112 \ 113 product(uintx, ArraycopySrcPrefetchDistance, 0, \ 114 "Distance to prefetch source array in arracopy") \ 115 \ 116 product(uintx, ArraycopyDstPrefetchDistance, 0, \ 117 "Distance to prefetch destination array in arracopy") \ 118 119#endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP 120