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comparison: src/cpu/ppc/vm/globals_ppc.hpp

src/cpu/ppc/vm/globals_ppc.hpp

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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, TrapBasedNullChecks, true);
42 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast.
43
44 // Use large code-entry alignment.
45 define_pd_global(intx, CodeEntryAlignment, 128);
46 define_pd_global(intx, OptoLoopAlignment, 16);
47 define_pd_global(intx, InlineFrequencyCount, 100);
48 define_pd_global(intx, InlineSmallCode, 1500);
49
50 define_pd_global(intx, PreInflateSpin, 10);
51
52 // Flags for template interpreter.
53 define_pd_global(bool, RewriteBytecodes, true);
54 define_pd_global(bool, RewriteFrequentPairs, true);
55
56 define_pd_global(bool, UseMembar, false);
57
58 // GC Ergo Flags
59 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread.
60
61 define_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

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