hotspot/src/cpu/ppc/vm/globals_ppc.hpp
changeset 22824 28258dd5cb2e
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22823:40b2c6c30123 22824:28258dd5cb2e
       
     1 /*
       
     2  * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
       
     3  * Copyright 2012, 2013 SAP AG. All rights reserved.
       
     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
       
     5  *
       
     6  * This code is free software; you can redistribute it and/or modify it
       
     7  * under the terms of the GNU General Public License version 2 only, as
       
     8  * published by the Free Software Foundation.
       
     9  *
       
    10  * This code is distributed in the hope that it will be useful, but WITHOUT
       
    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
       
    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
       
    13  * version 2 for more details (a copy is included in the LICENSE file that
       
    14  * accompanied this code).
       
    15  *
       
    16  * You should have received a copy of the GNU General Public License version
       
    17  * 2 along with this work; if not, write to the Free Software Foundation,
       
    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
       
    19  *
       
    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
       
    21  * or visit www.oracle.com if you need additional information or have any
       
    22  * questions.
       
    23  *
       
    24  */
       
    25 
       
    26 #ifndef CPU_PPC_VM_GLOBALS_PPC_HPP
       
    27 #define CPU_PPC_VM_GLOBALS_PPC_HPP
       
    28 
       
    29 #include "utilities/globalDefinitions.hpp"
       
    30 #include "utilities/macros.hpp"
       
    31 
       
    32 // Sets the default values for platform dependent flags used by the runtime system.
       
    33 // (see globals.hpp)
       
    34 
       
    35 define_pd_global(bool, ConvertSleepToYield,   true);
       
    36 define_pd_global(bool, ShareVtableStubs,      false); // Improves performance markedly for mtrt and compress.
       
    37 define_pd_global(bool, NeedsDeoptSuspend,     false); // Only register window machines need this.
       
    38 
       
    39 
       
    40 define_pd_global(bool, ImplicitNullChecks,    true);  // Generate code for implicit null checks.
       
    41 define_pd_global(bool, UncommonNullCast,      true);  // Uncommon-trap NULLs passed to check cast.
       
    42 
       
    43 // Use large code-entry alignment.
       
    44 define_pd_global(intx, CodeEntryAlignment,    128);
       
    45 define_pd_global(intx, OptoLoopAlignment,     16);
       
    46 define_pd_global(intx, InlineFrequencyCount,  100);
       
    47 define_pd_global(intx, InlineSmallCode,       1500);
       
    48 
       
    49 define_pd_global(intx, PreInflateSpin,        10);
       
    50 
       
    51 // Flags for template interpreter.
       
    52 define_pd_global(bool, RewriteBytecodes,      true);
       
    53 define_pd_global(bool, RewriteFrequentPairs,  true);
       
    54 
       
    55 define_pd_global(bool, UseMembar,             false);
       
    56 
       
    57 // GC Ergo Flags
       
    58 define_pd_global(intx, CMSYoungGenPerWorker,  16*M);  // Default max size of CMS young gen, per GC worker thread.
       
    59 
       
    60 
       
    61 // Platform dependent flag handling: flags only defined on this platform.
       
    62 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct)  \
       
    63   product(uintx, PowerArchitecturePPC64, 0,                                 \
       
    64           "CPU Version: x for PowerX. Currently recognizes Power5 to "      \
       
    65           "Power7. Default is 0. CPUs newer than Power7 will be "           \
       
    66           "recognized as Power7.")                                          \
       
    67                                                                             \
       
    68   /* Reoptimize code-sequences of calls at runtime, e.g. replace an */      \
       
    69   /* indirect call by a direct call.                                */      \
       
    70   product(bool, ReoptimizeCallSequences, true,                              \
       
    71           "Reoptimize code-sequences of calls at runtime.")                 \
       
    72                                                                             \
       
    73   product(bool, UseLoadInstructionsForStackBangingPPC64, false,             \
       
    74           "Use load instructions for stack banging.")                       \
       
    75                                                                             \
       
    76   /* special instructions */                                                \
       
    77                                                                             \
       
    78   product(bool, UseCountLeadingZerosInstructionsPPC64, true,                \
       
    79           "Use count leading zeros instructions.")                          \
       
    80                                                                             \
       
    81   product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false,          \
       
    82           "Use extended versions of load-and-reserve instructions.")        \
       
    83                                                                             \
       
    84   product(bool, UseRotateAndMaskInstructionsPPC64, true,                    \
       
    85           "Use rotate and mask instructions.")                              \
       
    86                                                                             \
       
    87   product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true,       \
       
    88           "Use static branch prediction hints in CAS operations.")          \
       
    89                                                                             \
       
    90   /* Trap based checks. */                                                  \
       
    91   /* Trap based checks use the ppc trap instructions to check certain */    \
       
    92   /* conditions. This instruction raises a SIGTRAP caught by the      */    \
       
    93   /* exception handler of the VM.                                     */    \
       
    94   product(bool, UseSIGTRAP, false,                                          \
       
    95           "Allow trap instructions that make use of SIGTRAP. Use this to "  \
       
    96           "switch off all optimizations requiring SIGTRAP.")                \
       
    97   product(bool, TrapBasedICMissChecks, true,                                \
       
    98           "Raise and handle SIGTRAP if inline cache miss detected.")        \
       
    99   product(bool, TrapBasedNotEntrantChecks, true,                            \
       
   100           "Raise and handle SIGTRAP if calling not entrant or zombie"       \
       
   101           " method.")                                                       \
       
   102   product(bool, TrapBasedNullChecks, true,                                  \
       
   103           "Generate code for null checks that uses a cmp and trap "         \
       
   104           "instruction raising SIGTRAP.  This is only used if an access to" \
       
   105           "null (+offset) will not raise a SIGSEGV.")                       \
       
   106   product(bool, TrapBasedRangeChecks, true,                                 \
       
   107           "Raise and handle SIGTRAP if array out of bounds check fails.")   \
       
   108   product(bool, TraceTraps, false, "Trace all traps the signal handler"     \
       
   109           "handles.")                                                       \
       
   110                                                                             \
       
   111   product(bool, ZapMemory, false, "Write 0x0101... to empty memory."        \
       
   112           " Use this to ease debugging.")                                   \
       
   113 
       
   114 
       
   115 
       
   116 #endif // CPU_PPC_VM_GLOBALS_PPC_HPP