globals_ppc.hpp revision 12469:c7a256349729 
1/*
2 * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2016 SAP SE. 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.
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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, ShareVtableStubs,      false); // Improves performance markedly for mtrt and compress.
36define_pd_global(bool, NeedsDeoptSuspend,     false); // Only register window machines need this.
37
38
39define_pd_global(bool, ImplicitNullChecks,    true);  // Generate code for implicit null checks.
40define_pd_global(bool, TrapBasedNullChecks,   true);
41define_pd_global(bool, UncommonNullCast,      true);  // Uncommon-trap NULLs passed to check cast.
42
43#define DEFAULT_STACK_YELLOW_PAGES (2)
44#define DEFAULT_STACK_RED_PAGES (1)
45// Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
46// stack if compiled for unix and LP64. To pass stack overflow tests we need
47// 20 shadow pages.
48#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
49#define DEFAULT_STACK_RESERVED_PAGES (1)
50
51#define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
52#define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
53#define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1))
54#define MIN_STACK_RESERVED_PAGES (0)
55
56define_pd_global(intx, StackYellowPages,      DEFAULT_STACK_YELLOW_PAGES);
57define_pd_global(intx, StackRedPages,         DEFAULT_STACK_RED_PAGES);
58define_pd_global(intx, StackShadowPages,      DEFAULT_STACK_SHADOW_PAGES);
59define_pd_global(intx, StackReservedPages,    DEFAULT_STACK_RESERVED_PAGES);
60
61// Use large code-entry alignment.
62define_pd_global(uintx, CodeCacheSegmentSize,  128);
63define_pd_global(intx,  CodeEntryAlignment,    128);
64define_pd_global(intx,  OptoLoopAlignment,     16);
65define_pd_global(intx,  InlineFrequencyCount,  100);
66define_pd_global(intx,  InlineSmallCode,       1500);
67
68// Flags for template interpreter.
69define_pd_global(bool, RewriteBytecodes,      true);
70define_pd_global(bool, RewriteFrequentPairs,  true);
71
72define_pd_global(bool, UseMembar,             false);
73
74define_pd_global(bool, PreserveFramePointer,  false);
75
76// GC Ergo Flags
77define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.
78
79define_pd_global(uintx, TypeProfileLevel, 111);
80
81define_pd_global(bool, CompactStrings, true);
82
83define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
84
85// Platform dependent flag handling: flags only defined on this platform.
86#define ARCH_FLAGS(develop, \
87                   product, \
88                   diagnostic, \
89                   experimental, \
90                   notproduct, \
91                   range, \
92                   constraint, \
93                   writeable)  \
94                                                                            \
95  /* Load poll address from thread. This is used to implement per-thread */ \
96  /* safepoints on platforms != IA64. */                                    \
97  product(bool, LoadPollAddressFromThread, false,                           \
98          "Load polling page address from thread object (required for "     \
99          "per-thread safepoints on platforms != IA64)")                    \
100                                                                            \
101  product(uintx, PowerArchitecturePPC64, 0,                                 \
102          "CPU Version: x for PowerX. Currently recognizes Power5 to "      \
103          "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \
104                                                                            \
105  /* Reoptimize code-sequences of calls at runtime, e.g. replace an */      \
106  /* indirect call by a direct call.                                */      \
107  product(bool, ReoptimizeCallSequences, true,                              \
108          "Reoptimize code-sequences of calls at runtime.")                 \
109                                                                            \
110  /* Power 8: Configure Data Stream Control Register. */                    \
111  product(uint64_t,DSCR_PPC64, (uintx)-1,                                   \
112          "Power8 or later: Specify encoded value for Data Stream Control " \
113          "Register")                                                       \
114  product(uint64_t,DSCR_DPFD_PPC64, 8,                                      \
115          "Power8 or later: DPFD (default prefetch depth) value of the "    \
116          "Data Stream Control Register."                                   \
117          " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch")    \
118  product(uint64_t,DSCR_URG_PPC64, 8,                                       \
119          "Power8 or later: URG (depth attainment urgency) value of the "   \
120          "Data Stream Control Register."                                   \
121          " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch")    \
122                                                                            \
123  product(bool, UseLoadInstructionsForStackBangingPPC64, false,             \
124          "Use load instructions for stack banging.")                       \
125                                                                            \
126  /* special instructions */                                                \
127                                                                            \
128  product(bool, UseCountLeadingZerosInstructionsPPC64, true,                \
129          "Use count leading zeros instructions.")                          \
130                                                                            \
131  product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false,          \
132          "Use extended versions of load-and-reserve instructions.")        \
133                                                                            \
134  product(bool, UseRotateAndMaskInstructionsPPC64, true,                    \
135          "Use rotate and mask instructions.")                              \
136                                                                            \
137  product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true,       \
138          "Use static branch prediction hints in CAS operations.")          \
139  product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false,      \
140          "Use static branch prediction hints for uncommon paths.")         \
141                                                                            \
142  product(bool, UsePower6SchedulerPPC64, false,                             \
143          "Use Power6 Scheduler.")                                          \
144                                                                            \
145  product(bool, InsertEndGroupPPC64, false,                                 \
146          "Insert EndGroup instructions to optimize for Power6.")           \
147                                                                            \
148  /* Trap based checks. */                                                  \
149  /* Trap based checks use the ppc trap instructions to check certain */    \
150  /* conditions. This instruction raises a SIGTRAP caught by the      */    \
151  /* exception handler of the VM.                                     */    \
152  product(bool, UseSIGTRAP, true,                                           \
153          "Allow trap instructions that make use of SIGTRAP. Use this to "  \
154          "switch off all optimizations requiring SIGTRAP.")                \
155  product(bool, TrapBasedICMissChecks, true,                                \
156          "Raise and handle SIGTRAP if inline cache miss detected.")        \
157  product(bool, TrapBasedNotEntrantChecks, true,                            \
158          "Raise and handle SIGTRAP if calling not entrant or zombie"       \
159          " method.")                                                       \
160  product(bool, TraceTraps, false, "Trace all traps the signal handler"     \
161          "handles.")                                                       \
162                                                                            \
163  product(bool, ZapMemory, false, "Write 0x0101... to empty memory."        \
164          " Use this to ease debugging.")                                   \
165                                                                            \
166  /* Use Restricted Transactional Memory for lock eliding */                \
167  product(bool, UseRTMLocking, false,                                       \
168          "Enable RTM lock eliding for inflated locks in compiled code")    \
169                                                                            \
170  experimental(bool, UseRTMForStackLocks, false,                            \
171          "Enable RTM lock eliding for stack locks in compiled code")       \
172                                                                            \
173  product(bool, UseRTMDeopt, false,                                         \
174          "Perform deopt and recompilation based on RTM abort ratio")       \
175                                                                            \
176  product(uintx, RTMRetryCount, 5,                                          \
177          "Number of RTM retries on lock abort or busy")                    \
178                                                                            \
179  experimental(intx, RTMSpinLoopCount, 100,                                 \
180          "Spin count for lock to become free before RTM retry")            \
181                                                                            \
182  experimental(intx, RTMAbortThreshold, 1000,                               \
183          "Calculate abort ratio after this number of aborts")              \
184                                                                            \
185  experimental(intx, RTMLockingThreshold, 10000,                            \
186          "Lock count at which to do RTM lock eliding without "             \
187          "abort ratio calculation")                                        \
188                                                                            \
189  experimental(intx, RTMAbortRatio, 50,                                     \
190          "Lock abort ratio at which to stop use RTM lock eliding")         \
191                                                                            \
192  experimental(intx, RTMTotalCountIncrRate, 64,                             \
193          "Increment total RTM attempted lock count once every n times")    \
194                                                                            \
195  experimental(intx, RTMLockingCalculationDelay, 0,                         \
196          "Number of milliseconds to wait before start calculating aborts " \
197          "for RTM locking")                                                \
198                                                                            \
199  experimental(bool, UseRTMXendForLockBusy, true,                           \
200          "Use RTM Xend instead of Xabort when lock busy")                  \
201
202#endif // CPU_PPC_VM_GLOBALS_PPC_HPP
203