1 /*
2 * Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2018 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
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24 */
25
26 #ifndef CPU_PPC_GLOBALS_PPC_HPP
27 #define CPU_PPC_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, ImplicitNullChecks, true); // Generate code for implicit null checks.
36 define_pd_global(bool, TrapBasedNullChecks, true);
37 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast.
38
39 #define DEFAULT_STACK_YELLOW_PAGES (2)
40 #define DEFAULT_STACK_RED_PAGES (1)
41 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
42 // stack if compiled for unix and LP64. To pass stack overflow tests we need
43 // 20 shadow pages.
44 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
45 #define DEFAULT_STACK_RESERVED_PAGES (1)
46
47 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
48 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
49 #define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1))
50 #define MIN_STACK_RESERVED_PAGES (0)
51
52 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
53 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
54 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
55 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
56
57 // Use large code-entry alignment.
58 define_pd_global(uintx, CodeCacheSegmentSize, 128);
59 define_pd_global(intx, CodeEntryAlignment, 128);
60 define_pd_global(intx, OptoLoopAlignment, 16);
61 define_pd_global(intx, InlineFrequencyCount, 100);
62 define_pd_global(intx, InlineSmallCode, 1500);
63
64 // Flags for template interpreter.
65 define_pd_global(bool, RewriteBytecodes, true);
66 define_pd_global(bool, RewriteFrequentPairs, true);
67
68 define_pd_global(bool, PreserveFramePointer, false);
69
70 // GC Ergo Flags
71 define_pd_global(uintx, TypeProfileLevel, 111);
72
73 define_pd_global(bool, CompactStrings, true);
74
75 // 2x unrolled loop is shorter with more than 9 HeapWords.
76 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong);
77
78 define_pd_global(bool, ThreadLocalHandshakes, true);
79
80 // Platform dependent flag handling: flags only defined on this platform.
81 #define ARCH_FLAGS(develop, \
82 product, \
83 diagnostic, \
84 experimental, \
85 notproduct, \
86 range, \
87 constraint, \
88 writeable) \
89 \
90 product(uintx, PowerArchitecturePPC64, 0, \
91 "CPU Version: x for PowerX. Currently recognizes Power5 to " \
92 "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \
93 \
94 product(bool, SuperwordUseVSX, false, \
95 "Use Power8 VSX instructions for superword optimization.") \
96 \
97 /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \
98 /* indirect call by a direct call. */ \
99 product(bool, ReoptimizeCallSequences, true, \
100 "Reoptimize code-sequences of calls at runtime.") \
101 \
102 /* Power 8: Configure Data Stream Control Register. */ \
103 product(uint64_t,DSCR_PPC64, (uintx)-1, \
104 "Power8 or later: Specify encoded value for Data Stream Control " \
105 "Register") \
106 product(uint64_t,DSCR_DPFD_PPC64, 8, \
107 "Power8 or later: DPFD (default prefetch depth) value of the " \
108 "Data Stream Control Register." \
109 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \
110 product(uint64_t,DSCR_URG_PPC64, 8, \
111 "Power8 or later: URG (depth attainment urgency) value of the " \
112 "Data Stream Control Register." \
113 " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \
114 \
115 product(bool, UseLoadInstructionsForStackBangingPPC64, false, \
116 "Use load instructions for stack banging.") \
117 \
118 /* special instructions */ \
119 \
120 product(bool, UseCountLeadingZerosInstructionsPPC64, true, \
121 "Use count leading zeros instructions.") \
122 \
123 product(bool, UseCountTrailingZerosInstructionsPPC64, false, \
124 "Use count trailing zeros instructions.") \
125 \
126 product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \
127 "Use extended versions of load-and-reserve instructions.") \
128 \
129 product(bool, UseRotateAndMaskInstructionsPPC64, true, \
130 "Use rotate and mask instructions.") \
131 \
132 product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \
133 "Use static branch prediction hints in CAS operations.") \
134 product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \
135 "Use static branch prediction hints for uncommon paths.") \
136 \
137 product(bool, UsePower6SchedulerPPC64, false, \
138 "Use Power6 Scheduler.") \
139 \
140 product(bool, InsertEndGroupPPC64, false, \
141 "Insert EndGroup instructions to optimize for Power6.") \
142 \
143 /* Trap based checks. */ \
144 /* Trap based checks use the ppc trap instructions to check certain */ \
145 /* conditions. This instruction raises a SIGTRAP caught by the */ \
146 /* exception handler of the VM. */ \
147 product(bool, UseSIGTRAP, true, \
148 "Allow trap instructions that make use of SIGTRAP. Use this to " \
149 "switch off all optimizations requiring SIGTRAP.") \
150 product(bool, TrapBasedICMissChecks, true, \
151 "Raise and handle SIGTRAP if inline cache miss detected.") \
152 product(bool, TrapBasedNotEntrantChecks, true, \
153 "Raise and handle SIGTRAP if calling not entrant or zombie" \
154 " method.") \
155 product(bool, TraceTraps, false, "Trace all traps the signal handler" \
156 "handles.") \
157 \
158 product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \
159 " Use this to ease debugging.") \
160 \
161 /* Use Restricted Transactional Memory for lock elision */ \
162 product(bool, UseRTMLocking, false, \
163 "Enable RTM lock eliding for inflated locks in compiled code") \
164 \
165 experimental(bool, UseRTMForStackLocks, false, \
166 "Enable RTM lock eliding for stack locks in compiled code") \
167 \
168 product(bool, UseRTMDeopt, false, \
169 "Perform deopt and recompilation based on RTM abort ratio") \
170 \
171 product(int, RTMRetryCount, 5, \
172 "Number of RTM retries on lock abort or busy") \
173 range(0, max_jint) \
174 \
175 experimental(int, RTMSpinLoopCount, 100, \
176 "Spin count for lock to become free before RTM retry") \
177 range(0, 32767) /* immediate operand limit on ppc */ \
178 \
179 experimental(int, RTMAbortThreshold, 1000, \
180 "Calculate abort ratio after this number of aborts") \
181 range(0, max_jint) \
182 \
183 experimental(int, RTMLockingThreshold, 10000, \
184 "Lock count at which to do RTM lock eliding without " \
185 "abort ratio calculation") \
186 range(0, max_jint) \
187 \
188 experimental(int, RTMAbortRatio, 50, \
189 "Lock abort ratio at which to stop use RTM lock eliding") \
190 range(0, 100) /* natural range */ \
191 \
192 experimental(int, RTMTotalCountIncrRate, 64, \
193 "Increment total RTM attempted lock count once every n times") \
194 range(1, 32767) /* immediate operand limit on ppc */ \
195 constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \
196 \
197 experimental(intx, RTMLockingCalculationDelay, 0, \
198 "Number of milliseconds to wait before start calculating aborts " \
199 "for RTM locking") \
200 \
201 experimental(bool, UseRTMXendForLockBusy, true, \
202 "Use RTM Xend instead of Xabort when lock busy") \
203
204 #endif // CPU_PPC_GLOBALS_PPC_HPP