118 lines
6.5 KiB
C++
118 lines
6.5 KiB
C++
/*
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* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP
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#define CPU_SPARC_VM_GLOBALS_SPARC_HPP
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#include "utilities/globalDefinitions.hpp"
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#include "utilities/macros.hpp"
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// Sets the default values for platform dependent flags used by the runtime system.
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// (see globals.hpp)
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// For sparc we do not do call backs when a thread is in the interpreter, because the
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// interpreter dispatch needs at least two instructions - first to load the dispatch address
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// in a register, and second to jmp. The swapping of the dispatch table may occur _after_
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// the load of the dispatch address and hence the jmp would still go to the location
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// according to the prior table. So, we let the thread continue and let it block by itself.
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define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second
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define_pd_global(bool, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI
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define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
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define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter
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define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this
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define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
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define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast
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define_pd_global(intx, CodeEntryAlignment, 32);
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// The default setting 16/16 seems to work best.
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// (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
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define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
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define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
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define_pd_global(intx, InlineSmallCode, 1500);
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#ifdef _LP64
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// Stack slots are 2X larger in LP64 than in the 32 bit VM.
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define_pd_global(intx, ThreadStackSize, 1024);
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define_pd_global(intx, VMThreadStackSize, 1024);
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define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1));
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#else
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define_pd_global(intx, ThreadStackSize, 512);
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define_pd_global(intx, VMThreadStackSize, 512);
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define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
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#endif
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define_pd_global(intx, StackYellowPages, 2);
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define_pd_global(intx, StackRedPages, 1);
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define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center
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define_pd_global(bool, RewriteBytecodes, true);
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define_pd_global(bool, RewriteFrequentPairs, true);
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define_pd_global(bool, UseMembar, false);
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// GC Ergo Flags
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define_pd_global(intx, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread
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#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
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\
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product(intx, UseVIS, 99, \
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"Highest supported VIS instructions set on Sparc") \
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\
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product(bool, UseCBCond, false, \
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"Use compare and branch instruction on SPARC") \
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\
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product(bool, UseBlockZeroing, false, \
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"Use special cpu instructions for block zeroing") \
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\
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product(intx, BlockZeroingLowLimit, 2048, \
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"Minimum size in bytes when block zeroing will be used") \
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\
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product(bool, UseBlockCopy, false, \
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"Use special cpu instructions for block copy") \
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\
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product(intx, BlockCopyLowLimit, 2048, \
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"Minimum size in bytes when block copy will be used") \
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\
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develop(bool, UseV8InstrsOnly, false, \
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"Use SPARC-V8 Compliant instruction subset") \
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\
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product(bool, UseNiagaraInstrs, false, \
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"Use Niagara-efficient instruction subset") \
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\
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develop(bool, UseCASForSwap, false, \
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"Do not use swap instructions, but only CAS (in a loop) on SPARC")\
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\
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product(uintx, ArraycopySrcPrefetchDistance, 0, \
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"Distance to prefetch source array in arracopy") \
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\
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product(uintx, ArraycopyDstPrefetchDistance, 0, \
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"Distance to prefetch destination array in arracopy") \
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\
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develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \
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"Number of times to spin wait on a v8 atomic operation lock") \
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#endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP
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