globals_ppc.hpp revision 5999:67fa91961822 
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
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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
35define_pd_global(bool, ConvertSleepToYield,   true);
36define_pd_global(bool, ShareVtableStubs,      false); // Improves performance markedly for mtrt and compress.
37define_pd_global(bool, NeedsDeoptSuspend,     false); // Only register window machines need this.
38
39
40define_pd_global(bool, ImplicitNullChecks,    true);  // Generate code for implicit null checks.
41define_pd_global(bool, TrapBasedNullChecks,   true);
42define_pd_global(bool, UncommonNullCast,      true);  // Uncommon-trap NULLs passed to check cast.
43
44// Use large code-entry alignment.
45define_pd_global(intx, CodeEntryAlignment,    128);
46define_pd_global(intx, OptoLoopAlignment,     16);
47define_pd_global(intx, InlineFrequencyCount,  100);
48define_pd_global(intx, InlineSmallCode,       1500);
49
50define_pd_global(intx, PreInflateSpin,        10);
51
52// Flags for template interpreter.
53define_pd_global(bool, RewriteBytecodes,      true);
54define_pd_global(bool, RewriteFrequentPairs,  true);
55
56define_pd_global(bool, UseMembar,             false);
57
58// GC Ergo Flags
59define_pd_global(uintx, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.
60
61define_pd_global(uintx, TypeProfileLevel, 0);
62
63// Platform dependent flag handling: flags only defined on this platform.
64#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct)  \
65                                                                            \
66  /* Load poll address from thread. This is used to implement per-thread */ \
67  /* safepoints on platforms != IA64. */                                    \
68  product(bool, LoadPollAddressFromThread, false,                           \
69          "Load polling page address from thread object (required for "     \
70          "per-thread safepoints on platforms != IA64)")                    \
71                                                                            \
72  product(uintx, PowerArchitecturePPC64, 0,                                 \
73          "CPU Version: x for PowerX. Currently recognizes Power5 to "      \
74          "Power7. Default is 0. CPUs newer than Power7 will be "           \
75          "recognized as Power7.")                                          \
76                                                                            \
77  /* Reoptimize code-sequences of calls at runtime, e.g. replace an */      \
78  /* indirect call by a direct call.                                */      \
79  product(bool, ReoptimizeCallSequences, true,                              \
80          "Reoptimize code-sequences of calls at runtime.")                 \
81                                                                            \
82  product(bool, UseLoadInstructionsForStackBangingPPC64, false,             \
83          "Use load instructions for stack banging.")                       \
84                                                                            \
85  /* special instructions */                                                \
86                                                                            \
87  product(bool, UseCountLeadingZerosInstructionsPPC64, true,                \
88          "Use count leading zeros instructions.")                          \
89                                                                            \
90  product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false,          \
91          "Use extended versions of load-and-reserve instructions.")        \
92                                                                            \
93  product(bool, UseRotateAndMaskInstructionsPPC64, true,                    \
94          "Use rotate and mask instructions.")                              \
95                                                                            \
96  product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true,       \
97          "Use static branch prediction hints in CAS operations.")          \
98  product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false,      \
99          "Use static branch prediction hints for uncommon paths.")         \
100                                                                            \
101  product(bool, UsePower6SchedulerPPC64, false,                             \
102          "Use Power6 Scheduler.")                                          \
103                                                                            \
104  product(bool, InsertEndGroupPPC64, false,                                 \
105          "Insert EndGroup instructions to optimize for Power6.")           \
106                                                                            \
107  /* Trap based checks. */                                                  \
108  /* Trap based checks use the ppc trap instructions to check certain */    \
109  /* conditions. This instruction raises a SIGTRAP caught by the      */    \
110  /* exception handler of the VM.                                     */    \
111  product(bool, UseSIGTRAP, true,                                           \
112          "Allow trap instructions that make use of SIGTRAP. Use this to "  \
113          "switch off all optimizations requiring SIGTRAP.")                \
114  product(bool, TrapBasedICMissChecks, true,                                \
115          "Raise and handle SIGTRAP if inline cache miss detected.")        \
116  product(bool, TrapBasedNotEntrantChecks, true,                            \
117          "Raise and handle SIGTRAP if calling not entrant or zombie"       \
118          " method.")                                                       \
119  product(bool, TraceTraps, false, "Trace all traps the signal handler"     \
120          "handles.")                                                       \
121                                                                            \
122  product(bool, ZapMemory, false, "Write 0x0101... to empty memory."        \
123          " Use this to ease debugging.")                                   \
124
125
126#endif // CPU_PPC_VM_GLOBALS_PPC_HPP
127