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view src/cpu/sparc/vm/globals_sparc.hpp @ 10185:d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
Summary: In graphKit INT operations were generated to access PtrQueue::_index which has type size_t. This is 64 bit on 64-bit machines. No problems occur on little endian machines as long as the index fits into 32 bit, but on big endian machines the upper part is read, which is zero. This leads to unnecessary branches to the slow path in the runtime.
Reviewed-by: twisti, johnc
Contributed-by: Martin Doerr <martin.doerr@sap.com>
author | johnc |
---|---|
date | Wed, 24 Apr 2013 14:48:43 -0700 |
parents | a5dd6e3ef9f3 |
children | 12f651e29f6b |
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/* * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP #define CPU_SPARC_VM_GLOBALS_SPARC_HPP #include "utilities/globalDefinitions.hpp" #include "utilities/macros.hpp" // Sets the default values for platform dependent flags used by the runtime system. // (see globals.hpp) // For sparc we do not do call backs when a thread is in the interpreter, because the // interpreter dispatch needs at least two instructions - first to load the dispatch address // in a register, and second to jmp. The swapping of the dispatch table may occur _after_ // the load of the dispatch address and hence the jmp would still go to the location // according to the prior table. So, we let the thread continue and let it block by itself. define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second define_pd_global(bool, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast define_pd_global(intx, CodeEntryAlignment, 32); // The default setting 16/16 seems to work best. // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.) define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC define_pd_global(intx, InlineSmallCode, 1500); #ifdef _LP64 // Stack slots are 2X larger in LP64 than in the 32 bit VM. define_pd_global(intx, ThreadStackSize, 1024); define_pd_global(intx, VMThreadStackSize, 1024); define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1)); #else define_pd_global(intx, ThreadStackSize, 512); define_pd_global(intx, VMThreadStackSize, 512); define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1)); #endif define_pd_global(intx, StackYellowPages, 2); define_pd_global(intx, StackRedPages, 1); define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center define_pd_global(bool, RewriteBytecodes, true); define_pd_global(bool, RewriteFrequentPairs, true); define_pd_global(bool, UseMembar, false); // GC Ergo Flags define_pd_global(intx, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ \ product(intx, UseVIS, 99, \ "Highest supported VIS instructions set on Sparc") \ \ product(bool, UseCBCond, false, \ "Use compare and branch instruction on SPARC") \ \ product(bool, UseBlockZeroing, false, \ "Use special cpu instructions for block zeroing") \ \ product(intx, BlockZeroingLowLimit, 2048, \ "Minimum size in bytes when block zeroing will be used") \ \ product(bool, UseBlockCopy, false, \ "Use special cpu instructions for block copy") \ \ product(intx, BlockCopyLowLimit, 2048, \ "Minimum size in bytes when block copy will be used") \ \ develop(bool, UseV8InstrsOnly, false, \ "Use SPARC-V8 Compliant instruction subset") \ \ product(bool, UseNiagaraInstrs, false, \ "Use Niagara-efficient instruction subset") \ \ develop(bool, UseCASForSwap, false, \ "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ \ product(uintx, ArraycopySrcPrefetchDistance, 0, \ "Distance to prefetch source array in arracopy") \ \ product(uintx, ArraycopyDstPrefetchDistance, 0, \ "Distance to prefetch destination array in arracopy") \ \ develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ "Number of times to spin wait on a v8 atomic operation lock") \ #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP