Mercurial > hg > truffle
annotate src/share/vm/runtime/globals.hpp @ 1888:a7214d79fcf1
6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data
Summary: Deprecated HandlePromotionFailure, removing the ability to turn off that feature, did away with one epoch look-ahead when deciding if a scavenge is likely to fail, relying on current data.
Reviewed-by: jmasa, johnc, poonam
author | ysr |
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date | Sat, 23 Oct 2010 23:03:49 -0700 |
parents | cd3ef3fd20dd |
children | f5c8d6e5bfee |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1692 | 25 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) |
0 | 26 define_pd_global(bool, BackgroundCompilation, false); |
27 define_pd_global(bool, UseTLAB, false); | |
28 define_pd_global(bool, CICompileOSR, false); | |
29 define_pd_global(bool, UseTypeProfile, false); | |
30 define_pd_global(bool, UseOnStackReplacement, false); | |
31 define_pd_global(bool, InlineIntrinsics, false); | |
32 define_pd_global(bool, PreferInterpreterNativeStubs, true); | |
33 define_pd_global(bool, ProfileInterpreter, false); | |
34 define_pd_global(bool, ProfileTraps, false); | |
35 define_pd_global(bool, TieredCompilation, false); | |
36 | |
37 define_pd_global(intx, CompileThreshold, 0); | |
38 define_pd_global(intx, BackEdgeThreshold, 0); | |
39 | |
40 define_pd_global(intx, OnStackReplacePercentage, 0); | |
41 define_pd_global(bool, ResizeTLAB, false); | |
42 define_pd_global(intx, FreqInlineSize, 0); | |
1064 | 43 define_pd_global(intx, InlineSmallCode, 0); |
0 | 44 define_pd_global(intx, NewSizeThreadIncrease, 4*K); |
45 define_pd_global(intx, InlineClassNatives, true); | |
46 define_pd_global(intx, InlineUnsafeOps, true); | |
47 define_pd_global(intx, InitialCodeCacheSize, 160*K); | |
48 define_pd_global(intx, ReservedCodeCacheSize, 32*M); | |
49 define_pd_global(intx, CodeCacheExpansionSize, 32*K); | |
50 define_pd_global(intx, CodeCacheMinBlockLength, 1); | |
51 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); | |
52 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); | |
53 define_pd_global(bool, NeverActAsServerClassMachine, true); | |
1064 | 54 define_pd_global(uint64_t,MaxRAM, 1ULL*G); |
0 | 55 #define CI_COMPILER_COUNT 0 |
56 #else | |
57 | |
58 #ifdef COMPILER2 | |
59 #define CI_COMPILER_COUNT 2 | |
60 #else | |
61 #define CI_COMPILER_COUNT 1 | |
62 #endif // COMPILER2 | |
63 | |
64 #endif // no compilers | |
65 | |
66 | |
67 // string type aliases used only in this file | |
68 typedef const char* ccstr; | |
69 typedef const char* ccstrlist; // represents string arguments which accumulate | |
70 | |
71 enum FlagValueOrigin { | |
72 DEFAULT = 0, | |
73 COMMAND_LINE = 1, | |
74 ENVIRON_VAR = 2, | |
75 CONFIG_FILE = 3, | |
76 MANAGEMENT = 4, | |
77 ERGONOMIC = 5, | |
78 ATTACH_ON_DEMAND = 6, | |
79 INTERNAL = 99 | |
80 }; | |
81 | |
82 struct Flag { | |
83 const char *type; | |
84 const char *name; | |
85 void* addr; | |
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86 |
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87 NOT_PRODUCT(const char *doc;) |
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88 |
0 | 89 const char *kind; |
90 FlagValueOrigin origin; | |
91 | |
92 // points to all Flags static array | |
93 static Flag *flags; | |
94 | |
95 // number of flags | |
96 static size_t numFlags; | |
97 | |
98 static Flag* find_flag(char* name, size_t length); | |
99 | |
100 bool is_bool() const { return strcmp(type, "bool") == 0; } | |
101 bool get_bool() const { return *((bool*) addr); } | |
102 void set_bool(bool value) { *((bool*) addr) = value; } | |
103 | |
104 bool is_intx() const { return strcmp(type, "intx") == 0; } | |
105 intx get_intx() const { return *((intx*) addr); } | |
106 void set_intx(intx value) { *((intx*) addr) = value; } | |
107 | |
108 bool is_uintx() const { return strcmp(type, "uintx") == 0; } | |
109 uintx get_uintx() const { return *((uintx*) addr); } | |
110 void set_uintx(uintx value) { *((uintx*) addr) = value; } | |
111 | |
1064 | 112 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } |
113 uint64_t get_uint64_t() const { return *((uint64_t*) addr); } | |
114 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } | |
115 | |
0 | 116 bool is_double() const { return strcmp(type, "double") == 0; } |
117 double get_double() const { return *((double*) addr); } | |
118 void set_double(double value) { *((double*) addr) = value; } | |
119 | |
120 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } | |
121 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } | |
122 ccstr get_ccstr() const { return *((ccstr*) addr); } | |
123 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } | |
124 | |
125 bool is_unlocker() const; | |
126 bool is_unlocked() const; | |
127 bool is_writeable() const; | |
128 bool is_external() const; | |
129 | |
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130 void print_on(outputStream* st, bool withComments = false ); |
0 | 131 void print_as_flag(outputStream* st); |
132 }; | |
133 | |
134 // debug flags control various aspects of the VM and are global accessible | |
135 | |
136 // use FlagSetting to temporarily change some debug flag | |
137 // e.g. FlagSetting fs(DebugThisAndThat, true); | |
138 // restored to previous value upon leaving scope | |
139 class FlagSetting { | |
140 bool val; | |
141 bool* flag; | |
142 public: | |
143 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } | |
144 ~FlagSetting() { *flag = val; } | |
145 }; | |
146 | |
147 | |
148 class CounterSetting { | |
149 intx* counter; | |
150 public: | |
151 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } | |
152 ~CounterSetting() { (*counter)--; } | |
153 }; | |
154 | |
155 | |
156 class IntFlagSetting { | |
157 intx val; | |
158 intx* flag; | |
159 public: | |
160 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } | |
161 ~IntFlagSetting() { *flag = val; } | |
162 }; | |
163 | |
164 | |
165 class DoubleFlagSetting { | |
166 double val; | |
167 double* flag; | |
168 public: | |
169 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } | |
170 ~DoubleFlagSetting() { *flag = val; } | |
171 }; | |
172 | |
173 | |
174 class CommandLineFlags { | |
175 public: | |
176 static bool boolAt(char* name, size_t len, bool* value); | |
177 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } | |
178 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); | |
179 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } | |
180 | |
181 static bool intxAt(char* name, size_t len, intx* value); | |
182 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } | |
183 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); | |
184 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } | |
185 | |
186 static bool uintxAt(char* name, size_t len, uintx* value); | |
187 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } | |
188 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); | |
189 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } | |
190 | |
1064 | 191 static bool uint64_tAt(char* name, size_t len, uint64_t* value); |
192 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } | |
193 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); | |
194 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } | |
195 | |
0 | 196 static bool doubleAt(char* name, size_t len, double* value); |
197 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } | |
198 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); | |
199 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } | |
200 | |
201 static bool ccstrAt(char* name, size_t len, ccstr* value); | |
202 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } | |
203 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); | |
204 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } | |
205 | |
206 // Returns false if name is not a command line flag. | |
207 static bool wasSetOnCmdline(const char* name, bool* value); | |
208 static void printSetFlags(); | |
209 | |
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210 static void printFlags(bool withComments = false ); |
0 | 211 |
212 static void verify() PRODUCT_RETURN; | |
213 }; | |
214 | |
215 // use this for flags that are true by default in the debug version but | |
216 // false in the optimized version, and vice versa | |
217 #ifdef ASSERT | |
218 #define trueInDebug true | |
219 #define falseInDebug false | |
220 #else | |
221 #define trueInDebug false | |
222 #define falseInDebug true | |
223 #endif | |
224 | |
225 // use this for flags that are true per default in the product build | |
226 // but false in development builds, and vice versa | |
227 #ifdef PRODUCT | |
228 #define trueInProduct true | |
229 #define falseInProduct false | |
230 #else | |
231 #define trueInProduct false | |
232 #define falseInProduct true | |
233 #endif | |
234 | |
235 // use this for flags that are true per default in the tiered build | |
236 // but false in non-tiered builds, and vice versa | |
237 #ifdef TIERED | |
238 #define trueInTiered true | |
239 #define falseInTiered false | |
240 #else | |
241 #define trueInTiered false | |
242 #define falseInTiered true | |
243 #endif | |
244 | |
245 // develop flags are settable / visible only during development and are constant in the PRODUCT version | |
246 // product flags are always settable / visible | |
247 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version | |
248 | |
249 // A flag must be declared with one of the following types: | |
250 // bool, intx, uintx, ccstr. | |
251 // The type "ccstr" is an alias for "const char*" and is used | |
252 // only in this file, because the macrology requires single-token type names. | |
253 | |
254 // Note: Diagnostic options not meant for VM tuning or for product modes. | |
255 // They are to be used for VM quality assurance or field diagnosis | |
256 // of VM bugs. They are hidden so that users will not be encouraged to | |
257 // try them as if they were VM ordinary execution options. However, they | |
258 // are available in the product version of the VM. Under instruction | |
259 // from support engineers, VM customers can turn them on to collect | |
260 // diagnostic information about VM problems. To use a VM diagnostic | |
261 // option, you must first specify +UnlockDiagnosticVMOptions. | |
262 // (This master switch also affects the behavior of -Xprintflags.) | |
350
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263 // |
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264 // experimental flags are in support of features that are not |
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265 // part of the officially supported product, but are available |
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266 // for experimenting with. They could, for example, be performance |
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267 // features that may not have undergone full or rigorous QA, but which may |
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268 // help performance in some cases and released for experimentation |
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269 // by the community of users and developers. This flag also allows one to |
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270 // be able to build a fully supported product that nonetheless also |
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271 // ships with some unsupported, lightly tested, experimental features. |
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272 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding |
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273 // UnlockExperimentalVMOptions flag, which allows the control and |
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274 // modification of the experimental flags. |
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275 // |
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276 // Nota bene: neither diagnostic nor experimental options should be used casually, |
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277 // and they are not supported on production loads, except under explicit |
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278 // direction from support engineers. |
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279 // |
0 | 280 // manageable flags are writeable external product flags. |
281 // They are dynamically writeable through the JDK management interface | |
282 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. | |
283 // These flags are external exported interface (see CCC). The list of | |
284 // manageable flags can be queried programmatically through the management | |
285 // interface. | |
286 // | |
287 // A flag can be made as "manageable" only if | |
288 // - the flag is defined in a CCC as an external exported interface. | |
289 // - the VM implementation supports dynamic setting of the flag. | |
290 // This implies that the VM must *always* query the flag variable | |
291 // and not reuse state related to the flag state at any given time. | |
292 // - you want the flag to be queried programmatically by the customers. | |
293 // | |
294 // product_rw flags are writeable internal product flags. | |
295 // They are like "manageable" flags but for internal/private use. | |
296 // The list of product_rw flags are internal/private flags which | |
297 // may be changed/removed in a future release. It can be set | |
298 // through the management interface to get/set value | |
299 // when the name of flag is supplied. | |
300 // | |
301 // A flag can be made as "product_rw" only if | |
302 // - the VM implementation supports dynamic setting of the flag. | |
303 // This implies that the VM must *always* query the flag variable | |
304 // and not reuse state related to the flag state at any given time. | |
305 // | |
306 // Note that when there is a need to support develop flags to be writeable, | |
307 // it can be done in the same way as product_rw. | |
308 | |
350
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309 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ |
113
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310 \ |
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311 lp64_product(bool, UseCompressedOops, false, \ |
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312 "Use 32-bit object references in 64-bit VM. " \ |
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313 "lp64_product means flag is always constant in 32 bit VM") \ |
0 | 314 \ |
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315 notproduct(bool, CheckCompressedOops, true, \ |
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316 "generate checks in encoding/decoding code in debug VM") \ |
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317 \ |
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318 product_pd(uintx, HeapBaseMinAddress, \ |
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319 "OS specific low limit for heap base address") \ |
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320 \ |
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321 diagnostic(bool, PrintCompressedOopsMode, false, \ |
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322 "Print compressed oops base address and encoding mode") \ |
325
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323 \ |
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324 lp64_product(intx, ObjectAlignmentInBytes, 8, \ |
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325 "Default object alignment in bytes, 8 is minimum") \ |
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326 \ |
0 | 327 /* UseMembar is theoretically a temp flag used for memory barrier \ |
328 * removal testing. It was supposed to be removed before FCS but has \ | |
329 * been re-added (see 6401008) */ \ | |
330 product(bool, UseMembar, false, \ | |
331 "(Unstable) Issues membars on thread state transitions") \ | |
332 \ | |
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333 /* Temporary: See 6948537 */ \ |
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334 experimental(bool, UseMemSetInBOT, true, \ |
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335 "(Unstable) uses memset in BOT updates in GC code") \ |
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336 \ |
0 | 337 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ |
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338 "Enable normal processing of flags relating to field diagnostics")\ |
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339 \ |
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340 experimental(bool, UnlockExperimentalVMOptions, false, \ |
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341 "Enable normal processing of flags relating to experimental features")\ |
0 | 342 \ |
343 product(bool, JavaMonitorsInStackTrace, true, \ | |
344 "Print info. about Java monitor locks when the stacks are dumped")\ | |
345 \ | |
346 product_pd(bool, UseLargePages, \ | |
347 "Use large page memory") \ | |
348 \ | |
389
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349 product_pd(bool, UseLargePagesIndividualAllocation, \ |
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350 "Allocate large pages individually for better affinity") \ |
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351 \ |
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352 develop(bool, LargePagesIndividualAllocationInjectError, false, \ |
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353 "Fail large pages individual allocation") \ |
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354 \ |
0 | 355 develop(bool, TracePageSizes, false, \ |
356 "Trace page size selection and usage.") \ | |
357 \ | |
358 product(bool, UseNUMA, false, \ | |
359 "Use NUMA if available") \ | |
360 \ | |
462
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361 product(bool, ForceNUMA, false, \ |
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362 "Force NUMA optimizations on single-node/UMA systems") \ |
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363 \ |
0 | 364 product(intx, NUMAChunkResizeWeight, 20, \ |
365 "Percentage (0-100) used to weight the current sample when " \ | |
366 "computing exponentially decaying average for " \ | |
367 "AdaptiveNUMAChunkSizing") \ | |
368 \ | |
369 product(intx, NUMASpaceResizeRate, 1*G, \ | |
370 "Do not reallocate more that this amount per collection") \ | |
371 \ | |
372 product(bool, UseAdaptiveNUMAChunkSizing, true, \ | |
373 "Enable adaptive chunk sizing for NUMA") \ | |
374 \ | |
375 product(bool, NUMAStats, false, \ | |
376 "Print NUMA stats in detailed heap information") \ | |
377 \ | |
378 product(intx, NUMAPageScanRate, 256, \ | |
379 "Maximum number of pages to include in the page scan procedure") \ | |
380 \ | |
381 product_pd(bool, NeedsDeoptSuspend, \ | |
382 "True for register window machines (sparc/ia64)") \ | |
383 \ | |
384 product(intx, UseSSE, 99, \ | |
385 "Highest supported SSE instructions set on x86/x64") \ | |
386 \ | |
387 product(uintx, LargePageSizeInBytes, 0, \ | |
388 "Large page size (0 to let VM choose the page size") \ | |
389 \ | |
390 product(uintx, LargePageHeapSizeThreshold, 128*M, \ | |
391 "Use large pages if max heap is at least this big") \ | |
392 \ | |
393 product(bool, ForceTimeHighResolution, false, \ | |
394 "Using high time resolution(For Win32 only)") \ | |
395 \ | |
396 develop(bool, TraceItables, false, \ | |
397 "Trace initialization and use of itables") \ | |
398 \ | |
399 develop(bool, TracePcPatching, false, \ | |
400 "Trace usage of frame::patch_pc") \ | |
401 \ | |
402 develop(bool, TraceJumps, false, \ | |
403 "Trace assembly jumps in thread ring buffer") \ | |
404 \ | |
405 develop(bool, TraceRelocator, false, \ | |
406 "Trace the bytecode relocator") \ | |
407 \ | |
408 develop(bool, TraceLongCompiles, false, \ | |
409 "Print out every time compilation is longer than " \ | |
410 "a given threashold") \ | |
411 \ | |
412 develop(bool, SafepointALot, false, \ | |
413 "Generates a lot of safepoints. Works with " \ | |
414 "GuaranteedSafepointInterval") \ | |
415 \ | |
416 product_pd(bool, BackgroundCompilation, \ | |
417 "A thread requesting compilation is not blocked during " \ | |
418 "compilation") \ | |
419 \ | |
420 product(bool, PrintVMQWaitTime, false, \ | |
421 "Prints out the waiting time in VM operation queue") \ | |
422 \ | |
423 develop(bool, BailoutToInterpreterForThrows, false, \ | |
424 "Compiled methods which throws/catches exceptions will be " \ | |
425 "deopt and intp.") \ | |
426 \ | |
427 develop(bool, NoYieldsInMicrolock, false, \ | |
428 "Disable yields in microlock") \ | |
429 \ | |
430 develop(bool, TraceOopMapGeneration, false, \ | |
431 "Shows oopmap generation") \ | |
432 \ | |
433 product(bool, MethodFlushing, true, \ | |
434 "Reclamation of zombie and not-entrant methods") \ | |
435 \ | |
436 develop(bool, VerifyStack, false, \ | |
437 "Verify stack of each thread when it is entering a runtime call") \ | |
438 \ | |
439 develop(bool, ForceUnreachable, false, \ | |
440 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ | |
441 \ | |
442 notproduct(bool, StressDerivedPointers, false, \ | |
443 "Force scavenge when a derived pointers is detected on stack " \ | |
444 "after rtm call") \ | |
445 \ | |
446 develop(bool, TraceDerivedPointers, false, \ | |
447 "Trace traversal of derived pointers on stack") \ | |
448 \ | |
449 notproduct(bool, TraceCodeBlobStacks, false, \ | |
450 "Trace stack-walk of codeblobs") \ | |
451 \ | |
452 product(bool, PrintJNIResolving, false, \ | |
453 "Used to implement -v:jni") \ | |
454 \ | |
455 notproduct(bool, PrintRewrites, false, \ | |
456 "Print methods that are being rewritten") \ | |
457 \ | |
458 product(bool, UseInlineCaches, true, \ | |
459 "Use Inline Caches for virtual calls ") \ | |
460 \ | |
461 develop(bool, InlineArrayCopy, true, \ | |
462 "inline arraycopy native that is known to be part of " \ | |
463 "base library DLL") \ | |
464 \ | |
465 develop(bool, InlineObjectHash, true, \ | |
466 "inline Object::hashCode() native that is known to be part " \ | |
467 "of base library DLL") \ | |
468 \ | |
469 develop(bool, InlineObjectCopy, true, \ | |
470 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ | |
471 \ | |
472 develop(bool, InlineNatives, true, \ | |
473 "inline natives that are known to be part of base library DLL") \ | |
474 \ | |
475 develop(bool, InlineMathNatives, true, \ | |
476 "inline SinD, CosD, etc.") \ | |
477 \ | |
478 develop(bool, InlineClassNatives, true, \ | |
479 "inline Class.isInstance, etc") \ | |
480 \ | |
481 develop(bool, InlineAtomicLong, true, \ | |
482 "inline sun.misc.AtomicLong") \ | |
483 \ | |
484 develop(bool, InlineThreadNatives, true, \ | |
485 "inline Thread.currentThread, etc") \ | |
486 \ | |
487 develop(bool, InlineReflectionGetCallerClass, true, \ | |
488 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ | |
489 "of base library DLL") \ | |
490 \ | |
491 develop(bool, InlineUnsafeOps, true, \ | |
492 "inline memory ops (native methods) from sun.misc.Unsafe") \ | |
493 \ | |
494 develop(bool, ConvertCmpD2CmpF, true, \ | |
495 "Convert cmpD to cmpF when one input is constant in float range") \ | |
496 \ | |
497 develop(bool, ConvertFloat2IntClipping, true, \ | |
498 "Convert float2int clipping idiom to integer clipping") \ | |
499 \ | |
500 develop(bool, SpecialStringCompareTo, true, \ | |
501 "special version of string compareTo") \ | |
502 \ | |
503 develop(bool, SpecialStringIndexOf, true, \ | |
504 "special version of string indexOf") \ | |
505 \ | |
681 | 506 develop(bool, SpecialStringEquals, true, \ |
507 "special version of string equals") \ | |
508 \ | |
509 develop(bool, SpecialArraysEquals, true, \ | |
169
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510 "special version of Arrays.equals(char[],char[])") \ |
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511 \ |
681 | 512 product(bool, UseSSE42Intrinsics, false, \ |
513 "SSE4.2 versions of intrinsics") \ | |
514 \ | |
0 | 515 develop(bool, TraceCallFixup, false, \ |
516 "traces all call fixups") \ | |
517 \ | |
518 develop(bool, DeoptimizeALot, false, \ | |
519 "deoptimize at every exit from the runtime system") \ | |
520 \ | |
434 | 521 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ |
0 | 522 "a comma separated list of bcis to deoptimize at") \ |
523 \ | |
524 product(bool, DeoptimizeRandom, false, \ | |
525 "deoptimize random frames on random exit from the runtime system")\ | |
526 \ | |
527 notproduct(bool, ZombieALot, false, \ | |
528 "creates zombies (non-entrant) at exit from the runt. system") \ | |
529 \ | |
530 notproduct(bool, WalkStackALot, false, \ | |
531 "trace stack (no print) at every exit from the runtime system") \ | |
532 \ | |
533 develop(bool, Debugging, false, \ | |
534 "set when executing debug methods in debug.ccp " \ | |
535 "(to prevent triggering assertions)") \ | |
536 \ | |
537 notproduct(bool, StrictSafepointChecks, trueInDebug, \ | |
538 "Enable strict checks that safepoints cannot happen for threads " \ | |
539 "that used No_Safepoint_Verifier") \ | |
540 \ | |
541 notproduct(bool, VerifyLastFrame, false, \ | |
542 "Verify oops on last frame on entry to VM") \ | |
543 \ | |
544 develop(bool, TraceHandleAllocation, false, \ | |
545 "Prints out warnings when suspicious many handles are allocated") \ | |
546 \ | |
547 product(bool, UseCompilerSafepoints, true, \ | |
548 "Stop at safepoints in compiled code") \ | |
549 \ | |
550 product(bool, UseSplitVerifier, true, \ | |
551 "use split verifier with StackMapTable attributes") \ | |
552 \ | |
553 product(bool, FailOverToOldVerifier, true, \ | |
554 "fail over to old verifier when split verifier fails") \ | |
555 \ | |
556 develop(bool, ShowSafepointMsgs, false, \ | |
557 "Show msg. about safepoint synch.") \ | |
558 \ | |
559 product(bool, SafepointTimeout, false, \ | |
560 "Time out and warn or fail after SafepointTimeoutDelay " \ | |
561 "milliseconds if failed to reach safepoint") \ | |
562 \ | |
563 develop(bool, DieOnSafepointTimeout, false, \ | |
564 "Die upon failure to reach safepoint (see SafepointTimeout)") \ | |
565 \ | |
566 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ | |
567 /* typically, at most a few retries are needed */ \ | |
568 product(intx, SuspendRetryCount, 50, \ | |
569 "Maximum retry count for an external suspend request") \ | |
570 \ | |
571 product(intx, SuspendRetryDelay, 5, \ | |
572 "Milliseconds to delay per retry (* current_retry_count)") \ | |
573 \ | |
574 product(bool, AssertOnSuspendWaitFailure, false, \ | |
575 "Assert/Guarantee on external suspend wait failure") \ | |
576 \ | |
577 product(bool, TraceSuspendWaitFailures, false, \ | |
578 "Trace external suspend wait failures") \ | |
579 \ | |
580 product(bool, MaxFDLimit, true, \ | |
581 "Bump the number of file descriptors to max in solaris.") \ | |
582 \ | |
583 notproduct(bool, LogEvents, trueInDebug, \ | |
584 "Enable Event log") \ | |
585 \ | |
586 product(bool, BytecodeVerificationRemote, true, \ | |
587 "Enables the Java bytecode verifier for remote classes") \ | |
588 \ | |
589 product(bool, BytecodeVerificationLocal, false, \ | |
590 "Enables the Java bytecode verifier for local classes") \ | |
591 \ | |
592 develop(bool, ForceFloatExceptions, trueInDebug, \ | |
593 "Force exceptions on FP stack under/overflow") \ | |
594 \ | |
595 develop(bool, SoftMatchFailure, trueInProduct, \ | |
596 "If the DFA fails to match a node, print a message and bail out") \ | |
597 \ | |
598 develop(bool, VerifyStackAtCalls, false, \ | |
599 "Verify that the stack pointer is unchanged after calls") \ | |
600 \ | |
601 develop(bool, TraceJavaAssertions, false, \ | |
602 "Trace java language assertions") \ | |
603 \ | |
604 notproduct(bool, CheckAssertionStatusDirectives, false, \ | |
605 "temporary - see javaClasses.cpp") \ | |
606 \ | |
607 notproduct(bool, PrintMallocFree, false, \ | |
608 "Trace calls to C heap malloc/free allocation") \ | |
609 \ | |
1681
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610 product(bool, PrintOopAddress, false, \ |
0 | 611 "Always print the location of the oop") \ |
612 \ | |
613 notproduct(bool, VerifyCodeCacheOften, false, \ | |
614 "Verify compiled-code cache often") \ | |
615 \ | |
616 develop(bool, ZapDeadCompiledLocals, false, \ | |
617 "Zap dead locals in compiler frames") \ | |
618 \ | |
619 notproduct(bool, ZapDeadLocalsOld, false, \ | |
620 "Zap dead locals (old version, zaps all frames when " \ | |
621 "entering the VM") \ | |
622 \ | |
623 notproduct(bool, CheckOopishValues, false, \ | |
624 "Warn if value contains oop ( requires ZapDeadLocals)") \ | |
625 \ | |
626 develop(bool, UseMallocOnly, false, \ | |
627 "use only malloc/free for allocation (no resource area/arena)") \ | |
628 \ | |
629 develop(bool, PrintMalloc, false, \ | |
630 "print all malloc/free calls") \ | |
631 \ | |
632 develop(bool, ZapResourceArea, trueInDebug, \ | |
633 "Zap freed resource/arena space with 0xABABABAB") \ | |
634 \ | |
635 notproduct(bool, ZapVMHandleArea, trueInDebug, \ | |
636 "Zap freed VM handle space with 0xBCBCBCBC") \ | |
637 \ | |
638 develop(bool, ZapJNIHandleArea, trueInDebug, \ | |
639 "Zap freed JNI handle space with 0xFEFEFEFE") \ | |
640 \ | |
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641 notproduct(bool, ZapStackSegments, trueInDebug, \ |
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642 "Zap allocated/freed Stack segments with 0xFADFADED") \ |
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643 \ |
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644 develop(bool, ZapUnusedHeapArea, trueInDebug, \ |
0 | 645 "Zap unused heap space with 0xBAADBABE") \ |
646 \ | |
263
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647 develop(bool, TraceZapUnusedHeapArea, false, \ |
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648 "Trace zapping of unused heap space") \ |
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649 \ |
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650 develop(bool, CheckZapUnusedHeapArea, false, \ |
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651 "Check zapping of unused heap space") \ |
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652 \ |
481
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653 develop(bool, ZapFillerObjects, trueInDebug, \ |
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654 "Zap filler objects with 0xDEAFBABE") \ |
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655 \ |
0 | 656 develop(bool, PrintVMMessages, true, \ |
657 "Print vm messages on console") \ | |
658 \ | |
659 product(bool, PrintGCApplicationConcurrentTime, false, \ | |
660 "Print the time the application has been running") \ | |
661 \ | |
662 product(bool, PrintGCApplicationStoppedTime, false, \ | |
663 "Print the time the application has been stopped") \ | |
664 \ | |
1490
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665 notproduct(uintx, ErrorHandlerTest, 0, \ |
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666 "If > 0, provokes an error after VM initialization; the value" \ |
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667 "determines which error to provoke. See test_error_handler()" \ |
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668 "in debug.cpp.") \ |
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669 \ |
0 | 670 develop(bool, Verbose, false, \ |
671 "Prints additional debugging information from other modes") \ | |
672 \ | |
673 develop(bool, PrintMiscellaneous, false, \ | |
674 "Prints uncategorized debugging information (requires +Verbose)") \ | |
675 \ | |
676 develop(bool, WizardMode, false, \ | |
677 "Prints much more debugging information") \ | |
678 \ | |
679 product(bool, ShowMessageBoxOnError, false, \ | |
680 "Keep process alive on VM fatal error") \ | |
681 \ | |
682 product_pd(bool, UseOSErrorReporting, \ | |
683 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ | |
684 \ | |
685 product(bool, SuppressFatalErrorMessage, false, \ | |
686 "Do NO Fatal Error report [Avoid deadlock]") \ | |
687 \ | |
688 product(ccstrlist, OnError, "", \ | |
689 "Run user-defined commands on fatal error; see VMError.cpp " \ | |
690 "for examples") \ | |
691 \ | |
692 product(ccstrlist, OnOutOfMemoryError, "", \ | |
693 "Run user-defined commands on first java.lang.OutOfMemoryError") \ | |
694 \ | |
615
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695 manageable(bool, HeapDumpBeforeFullGC, false, \ |
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696 "Dump heap to file before any major stop-world GC") \ |
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697 \ |
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698 manageable(bool, HeapDumpAfterFullGC, false, \ |
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699 "Dump heap to file after any major stop-world GC") \ |
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700 \ |
0 | 701 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ |
702 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ | |
703 \ | |
704 manageable(ccstr, HeapDumpPath, NULL, \ | |
705 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ | |
706 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ | |
707 "in the working directory)") \ | |
708 \ | |
709 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ | |
710 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ | |
711 "when the heap usage is larger than this") \ | |
712 \ | |
713 develop(uintx, HeapDumpSegmentSize, 1*G, \ | |
714 "Approximate segment size when generating a segmented heap dump") \ | |
715 \ | |
716 develop(bool, BreakAtWarning, false, \ | |
717 "Execute breakpoint upon encountering VM warning") \ | |
718 \ | |
719 product_pd(bool, UseVectoredExceptions, \ | |
720 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ | |
721 \ | |
722 develop(bool, TraceVMOperation, false, \ | |
723 "Trace vm operations") \ | |
724 \ | |
725 develop(bool, UseFakeTimers, false, \ | |
726 "Tells whether the VM should use system time or a fake timer") \ | |
727 \ | |
728 diagnostic(bool, LogCompilation, false, \ | |
729 "Log compilation activity in detail to hotspot.log or LogFile") \ | |
730 \ | |
731 product(bool, PrintCompilation, false, \ | |
732 "Print compilations") \ | |
733 \ | |
734 diagnostic(bool, TraceNMethodInstalls, false, \ | |
735 "Trace nmethod intallation") \ | |
736 \ | |
989
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737 diagnostic(intx, ScavengeRootsInCode, 0, \ |
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738 "0: do not allow scavengable oops in the code cache; " \ |
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739 "1: allow scavenging from the code cache; " \ |
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740 "2: emit as many constants as the compiler can see") \ |
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741 \ |
0 | 742 diagnostic(bool, TraceOSRBreakpoint, false, \ |
743 "Trace OSR Breakpoint ") \ | |
744 \ | |
745 diagnostic(bool, TraceCompileTriggered, false, \ | |
746 "Trace compile triggered") \ | |
747 \ | |
748 diagnostic(bool, TraceTriggers, false, \ | |
749 "Trace triggers") \ | |
750 \ | |
751 product(bool, AlwaysRestoreFPU, false, \ | |
752 "Restore the FPU control word after every JNI call (expensive)") \ | |
753 \ | |
754 notproduct(bool, PrintCompilation2, false, \ | |
755 "Print additional statistics per compilation") \ | |
756 \ | |
100
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757 diagnostic(bool, PrintAdapterHandlers, false, \ |
0 | 758 "Print code generated for i2c/c2i adapters") \ |
759 \ | |
1207
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760 develop(bool, VerifyAdapterSharing, false, \ |
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761 "Verify that the code for shared adapters is the equivalent") \ |
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762 \ |
100
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763 diagnostic(bool, PrintAssembly, false, \ |
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764 "Print assembly code (using external disassembler.so)") \ |
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765 \ |
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766 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ |
100
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767 "Options string passed to disassembler.so") \ |
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768 \ |
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769 diagnostic(bool, PrintNMethods, false, \ |
0 | 770 "Print assembly code for nmethods when generated") \ |
771 \ | |
100
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772 diagnostic(bool, PrintNativeNMethods, false, \ |
0 | 773 "Print assembly code for native nmethods when generated") \ |
774 \ | |
775 develop(bool, PrintDebugInfo, false, \ | |
776 "Print debug information for all nmethods when generated") \ | |
777 \ | |
778 develop(bool, PrintRelocations, false, \ | |
779 "Print relocation information for all nmethods when generated") \ | |
780 \ | |
781 develop(bool, PrintDependencies, false, \ | |
782 "Print dependency information for all nmethods when generated") \ | |
783 \ | |
784 develop(bool, PrintExceptionHandlers, false, \ | |
785 "Print exception handler tables for all nmethods when generated") \ | |
786 \ | |
787 develop(bool, InterceptOSException, false, \ | |
788 "Starts debugger when an implicit OS (e.g., NULL) " \ | |
789 "exception happens") \ | |
790 \ | |
791 notproduct(bool, PrintCodeCache, false, \ | |
792 "Print the compiled_code cache when exiting") \ | |
793 \ | |
794 develop(bool, PrintCodeCache2, false, \ | |
795 "Print detailed info on the compiled_code cache when exiting") \ | |
796 \ | |
100
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797 diagnostic(bool, PrintStubCode, false, \ |
0 | 798 "Print generated stub code") \ |
799 \ | |
800 product(bool, StackTraceInThrowable, true, \ | |
801 "Collect backtrace in throwable when exception happens") \ | |
802 \ | |
803 product(bool, OmitStackTraceInFastThrow, true, \ | |
804 "Omit backtraces for some 'hot' exceptions in optimized code") \ | |
805 \ | |
806 product(bool, ProfilerPrintByteCodeStatistics, false, \ | |
807 "Prints byte code statictics when dumping profiler output") \ | |
808 \ | |
809 product(bool, ProfilerRecordPC, false, \ | |
810 "Collects tick for each 16 byte interval of compiled code") \ | |
811 \ | |
1064 | 812 product(bool, ProfileVM, false, \ |
0 | 813 "Profiles ticks that fall within VM (either in the VM Thread " \ |
814 "or VM code called through stubs)") \ | |
815 \ | |
816 product(bool, ProfileIntervals, false, \ | |
817 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ | |
818 \ | |
819 notproduct(bool, ProfilerCheckIntervals, false, \ | |
820 "Collect and print info on spacing of profiler ticks") \ | |
821 \ | |
822 develop(bool, PrintJVMWarnings, false, \ | |
823 "Prints warnings for unimplemented JVM functions") \ | |
824 \ | |
825 notproduct(uintx, WarnOnStalledSpinLock, 0, \ | |
826 "Prints warnings for stalled SpinLocks") \ | |
827 \ | |
828 develop(bool, InitializeJavaLangSystem, true, \ | |
829 "Initialize java.lang.System - turn off for individual " \ | |
830 "method debugging") \ | |
831 \ | |
832 develop(bool, InitializeJavaLangString, true, \ | |
833 "Initialize java.lang.String - turn off for individual " \ | |
834 "method debugging") \ | |
835 \ | |
836 develop(bool, InitializeJavaLangExceptionsErrors, true, \ | |
837 "Initialize various error and exception classes - turn off for " \ | |
838 "individual method debugging") \ | |
839 \ | |
840 product(bool, RegisterFinalizersAtInit, true, \ | |
841 "Register finalizable objects at end of Object.<init> or " \ | |
1064 | 842 "after allocation") \ |
0 | 843 \ |
844 develop(bool, RegisterReferences, true, \ | |
845 "Tells whether the VM should register soft/weak/final/phantom " \ | |
846 "references") \ | |
847 \ | |
848 develop(bool, IgnoreRewrites, false, \ | |
849 "Supress rewrites of bytecodes in the oopmap generator. " \ | |
850 "This is unsafe!") \ | |
851 \ | |
852 develop(bool, PrintCodeCacheExtension, false, \ | |
853 "Print extension of code cache") \ | |
854 \ | |
855 develop(bool, UsePrivilegedStack, true, \ | |
856 "Enable the security JVM functions") \ | |
857 \ | |
858 develop(bool, IEEEPrecision, true, \ | |
859 "Enables IEEE precision (for INTEL only)") \ | |
860 \ | |
861 develop(bool, ProtectionDomainVerification, true, \ | |
862 "Verifies protection domain before resolution in system " \ | |
863 "dictionary") \ | |
864 \ | |
865 product(bool, ClassUnloading, true, \ | |
866 "Do unloading of classes") \ | |
867 \ | |
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868 diagnostic(bool, LinkWellKnownClasses, false, \ |
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869 "Resolve a well known class as soon as its name is seen") \ |
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870 \ |
0 | 871 develop(bool, DisableStartThread, false, \ |
872 "Disable starting of additional Java threads " \ | |
873 "(for debugging only)") \ | |
874 \ | |
875 develop(bool, MemProfiling, false, \ | |
876 "Write memory usage profiling to log file") \ | |
877 \ | |
878 notproduct(bool, PrintSystemDictionaryAtExit, false, \ | |
879 "Prints the system dictionary at exit") \ | |
880 \ | |
881 diagnostic(bool, UnsyncloadClass, false, \ | |
514 | 882 "Unstable: VM calls loadClass unsynchronized. Custom " \ |
883 "class loader must call VM synchronized for findClass " \ | |
884 "and defineClass.") \ | |
885 \ | |
886 product(bool, AlwaysLockClassLoader, false, \ | |
887 "Require the VM to acquire the class loader lock before calling " \ | |
888 "loadClass() even for class loaders registering " \ | |
1064 | 889 "as parallel capable") \ |
514 | 890 \ |
891 product(bool, AllowParallelDefineClass, false, \ | |
892 "Allow parallel defineClass requests for class loaders " \ | |
1064 | 893 "registering as parallel capable") \ |
514 | 894 \ |
895 product(bool, MustCallLoadClassInternal, false, \ | |
1064 | 896 "Call loadClassInternal() rather than loadClass()") \ |
0 | 897 \ |
898 product_pd(bool, DontYieldALot, \ | |
899 "Throw away obvious excess yield calls (for SOLARIS only)") \ | |
900 \ | |
901 product_pd(bool, ConvertSleepToYield, \ | |
902 "Converts sleep(0) to thread yield " \ | |
903 "(may be off for SOLARIS to improve GUI)") \ | |
904 \ | |
905 product(bool, ConvertYieldToSleep, false, \ | |
906 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ | |
907 "behavior (SOLARIS only)") \ | |
908 \ | |
909 product(bool, UseBoundThreads, true, \ | |
910 "Bind user level threads to kernel threads (for SOLARIS only)") \ | |
911 \ | |
912 develop(bool, UseDetachedThreads, true, \ | |
913 "Use detached threads that are recycled upon termination " \ | |
914 "(for SOLARIS only)") \ | |
915 \ | |
916 product(bool, UseLWPSynchronization, true, \ | |
917 "Use LWP-based instead of libthread-based synchronization " \ | |
918 "(SPARC only)") \ | |
919 \ | |
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920 product(ccstr, SyncKnobs, NULL, \ |
0 | 921 "(Unstable) Various monitor synchronization tunables") \ |
922 \ | |
923 product(intx, EmitSync, 0, \ | |
924 "(Unsafe,Unstable) " \ | |
925 " Controls emission of inline sync fast-path code") \ | |
926 \ | |
927 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ | |
928 \ | |
1587 | 929 product(intx, MonitorBound, 0, "Bound Monitor population") \ |
930 \ | |
931 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ | |
932 \ | |
0 | 933 product(intx, Atomics, 0, \ |
934 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ | |
935 \ | |
936 product(intx, FenceInstruction, 0, \ | |
937 "(Unsafe,Unstable) Experimental") \ | |
938 \ | |
939 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ | |
940 \ | |
941 product(intx, SyncVerbose, 0, "(Unstable)" ) \ | |
942 \ | |
943 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ | |
944 \ | |
945 product(intx, hashCode, 0, \ | |
946 "(Unstable) select hashCode generation algorithm" ) \ | |
947 \ | |
948 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ | |
949 "(Unstable, Linux-specific)" \ | |
950 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ | |
951 \ | |
1064 | 952 product(bool, FilterSpuriousWakeups, true, \ |
953 "Prevent spurious or premature wakeups from object.wait " \ | |
954 "(Solaris only)") \ | |
0 | 955 \ |
956 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ | |
957 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ | |
958 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ | |
959 \ | |
960 develop(bool, UsePthreads, false, \ | |
961 "Use pthread-based instead of libthread-based synchronization " \ | |
962 "(SPARC only)") \ | |
963 \ | |
964 product(bool, AdjustConcurrency, false, \ | |
965 "call thr_setconcurrency at thread create time to avoid " \ | |
966 "LWP starvation on MP systems (For Solaris Only)") \ | |
967 \ | |
968 develop(bool, UpdateHotSpotCompilerFileOnError, true, \ | |
969 "Should the system attempt to update the compiler file when " \ | |
970 "an error occurs?") \ | |
971 \ | |
972 product(bool, ReduceSignalUsage, false, \ | |
973 "Reduce the use of OS signals in Java and/or the VM") \ | |
974 \ | |
975 notproduct(bool, ValidateMarkSweep, false, \ | |
976 "Do extra validation during MarkSweep collection") \ | |
977 \ | |
978 notproduct(bool, RecordMarkSweepCompaction, false, \ | |
979 "Enable GC-to-GC recording and querying of compaction during " \ | |
980 "MarkSweep") \ | |
981 \ | |
982 develop_pd(bool, ShareVtableStubs, \ | |
983 "Share vtable stubs (smaller code but worse branch prediction") \ | |
984 \ | |
985 develop(bool, LoadLineNumberTables, true, \ | |
986 "Tells whether the class file parser loads line number tables") \ | |
987 \ | |
988 develop(bool, LoadLocalVariableTables, true, \ | |
989 "Tells whether the class file parser loads local variable tables")\ | |
990 \ | |
991 develop(bool, LoadLocalVariableTypeTables, true, \ | |
992 "Tells whether the class file parser loads local variable type tables")\ | |
993 \ | |
994 product(bool, AllowUserSignalHandlers, false, \ | |
995 "Do not complain if the application installs signal handlers " \ | |
996 "(Solaris & Linux only)") \ | |
997 \ | |
998 product(bool, UseSignalChaining, true, \ | |
999 "Use signal-chaining to invoke signal handlers installed " \ | |
1000 "by the application (Solaris & Linux only)") \ | |
1001 \ | |
1002 product(bool, UseAltSigs, false, \ | |
1003 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ | |
1064 | 1004 "internal signals (Solaris only)") \ |
0 | 1005 \ |
1006 product(bool, UseSpinning, false, \ | |
1007 "Use spinning in monitor inflation and before entry") \ | |
1008 \ | |
1009 product(bool, PreSpinYield, false, \ | |
1010 "Yield before inner spinning loop") \ | |
1011 \ | |
1012 product(bool, PostSpinYield, true, \ | |
1013 "Yield after inner spinning loop") \ | |
1014 \ | |
1015 product(bool, AllowJNIEnvProxy, false, \ | |
1016 "Allow JNIEnv proxies for jdbx") \ | |
1017 \ | |
1018 product(bool, JNIDetachReleasesMonitors, true, \ | |
1019 "JNI DetachCurrentThread releases monitors owned by thread") \ | |
1020 \ | |
1021 product(bool, RestoreMXCSROnJNICalls, false, \ | |
1022 "Restore MXCSR when returning from JNI calls") \ | |
1023 \ | |
1024 product(bool, CheckJNICalls, false, \ | |
1025 "Verify all arguments to JNI calls") \ | |
1026 \ | |
1027 product(bool, UseFastJNIAccessors, true, \ | |
1028 "Use optimized versions of Get<Primitive>Field") \ | |
1029 \ | |
1030 product(bool, EagerXrunInit, false, \ | |
1031 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ | |
1032 " but not all -Xrun libraries may support the state of the VM at this time") \ | |
1033 \ | |
1034 product(bool, PreserveAllAnnotations, false, \ | |
1035 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ | |
1036 \ | |
1037 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ | |
1038 "Number of OutOfMemoryErrors preallocated with backtrace") \ | |
1039 \ | |
1040 product(bool, LazyBootClassLoader, true, \ | |
1041 "Enable/disable lazy opening of boot class path entries") \ | |
1042 \ | |
1043 diagnostic(bool, UseIncDec, true, \ | |
1044 "Use INC, DEC instructions on x86") \ | |
1045 \ | |
219 | 1046 product(bool, UseNewLongLShift, false, \ |
1047 "Use optimized bitwise shift left") \ | |
1048 \ | |
0 | 1049 product(bool, UseStoreImmI16, true, \ |
1050 "Use store immediate 16-bits value instruction on x86") \ | |
1051 \ | |
1052 product(bool, UseAddressNop, false, \ | |
1053 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ | |
1054 \ | |
1055 product(bool, UseXmmLoadAndClearUpper, true, \ | |
1056 "Load low part of XMM register and clear upper part") \ | |
1057 \ | |
1058 product(bool, UseXmmRegToRegMoveAll, false, \ | |
1059 "Copy all XMM register bits when moving value between registers") \ | |
1060 \ | |
71 | 1061 product(bool, UseXmmI2D, false, \ |
1062 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ | |
1063 \ | |
1064 product(bool, UseXmmI2F, false, \ | |
1065 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ | |
1066 \ | |
405 | 1067 product(bool, UseXMMForArrayCopy, false, \ |
1068 "Use SSE2 MOVQ instruction for Arraycopy") \ | |
1069 \ | |
1070 product(bool, UseUnalignedLoadStores, false, \ | |
1071 "Use SSE2 MOVDQU instruction for Arraycopy") \ | |
1072 \ | |
0 | 1073 product(intx, FieldsAllocationStyle, 1, \ |
1366
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1074 "0 - type based with oops first, 1 - with oops last, " \ |
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1075 "2 - oops in super and sub classes are together") \ |
0 | 1076 \ |
1077 product(bool, CompactFields, true, \ | |
1078 "Allocate nonstatic fields in gaps between previous fields") \ | |
1079 \ | |
1080 notproduct(bool, PrintCompactFieldsSavings, false, \ | |
1081 "Print how many words were saved with CompactFields") \ | |
1082 \ | |
1083 product(bool, UseBiasedLocking, true, \ | |
1084 "Enable biased locking in JVM") \ | |
1085 \ | |
1086 product(intx, BiasedLockingStartupDelay, 4000, \ | |
1087 "Number of milliseconds to wait before enabling biased locking") \ | |
1088 \ | |
1089 diagnostic(bool, PrintBiasedLockingStatistics, false, \ | |
1090 "Print statistics of biased locking in JVM") \ | |
1091 \ | |
1092 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ | |
1093 "Threshold of number of revocations per type to try to " \ | |
1094 "rebias all objects in the heap of that type") \ | |
1095 \ | |
1096 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ | |
1097 "Threshold of number of revocations per type to permanently " \ | |
1098 "revoke biases of all objects in the heap of that type") \ | |
1099 \ | |
1100 product(intx, BiasedLockingDecayTime, 25000, \ | |
1101 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ | |
1102 "type after previous bulk rebias") \ | |
1103 \ | |
1104 /* tracing */ \ | |
1105 \ | |
1106 notproduct(bool, TraceRuntimeCalls, false, \ | |
1107 "Trace run-time calls") \ | |
1108 \ | |
1109 develop(bool, TraceJNICalls, false, \ | |
1110 "Trace JNI calls") \ | |
1111 \ | |
1112 notproduct(bool, TraceJVMCalls, false, \ | |
1113 "Trace JVM calls") \ | |
1114 \ | |
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1115 product(ccstr, TraceJVMTI, NULL, \ |
0 | 1116 "Trace flags for JVMTI functions and events") \ |
1117 \ | |
880
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1118 product(bool, ForceFullGCJVMTIEpilogues, false, \ |
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1119 "Force 'Full GC' was done semantics for JVMTI GC epilogues") \ |
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1120 \ |
0 | 1121 /* This option can change an EMCP method into an obsolete method. */ \ |
1122 /* This can affect tests that except specific methods to be EMCP. */ \ | |
1123 /* This option should be used with caution. */ \ | |
1124 product(bool, StressLdcRewrite, false, \ | |
1125 "Force ldc -> ldc_w rewrite during RedefineClasses") \ | |
1126 \ | |
1127 product(intx, TraceRedefineClasses, 0, \ | |
1128 "Trace level for JVMTI RedefineClasses") \ | |
1129 \ | |
1574 | 1130 develop(bool, StressMethodComparator, false, \ |
1131 "run the MethodComparator on all loaded methods") \ | |
1132 \ | |
0 | 1133 /* change to false by default sometime after Mustang */ \ |
1134 product(bool, VerifyMergedCPBytecodes, true, \ | |
1135 "Verify bytecodes after RedefineClasses constant pool merging") \ | |
1136 \ | |
1137 develop(bool, TraceJNIHandleAllocation, false, \ | |
1138 "Trace allocation/deallocation of JNI handle blocks") \ | |
1139 \ | |
1140 develop(bool, TraceThreadEvents, false, \ | |
1141 "Trace all thread events") \ | |
1142 \ | |
1143 develop(bool, TraceBytecodes, false, \ | |
1144 "Trace bytecode execution") \ | |
1145 \ | |
1146 develop(bool, TraceClassInitialization, false, \ | |
1147 "Trace class initialization") \ | |
1148 \ | |
1149 develop(bool, TraceExceptions, false, \ | |
1150 "Trace exceptions") \ | |
1151 \ | |
1152 develop(bool, TraceICs, false, \ | |
1153 "Trace inline cache changes") \ | |
1154 \ | |
1155 notproduct(bool, TraceInvocationCounterOverflow, false, \ | |
1156 "Trace method invocation counter overflow") \ | |
1157 \ | |
1158 develop(bool, TraceInlineCacheClearing, false, \ | |
1159 "Trace clearing of inline caches in nmethods") \ | |
1160 \ | |
1161 develop(bool, TraceDependencies, false, \ | |
1162 "Trace dependencies") \ | |
1163 \ | |
1164 develop(bool, VerifyDependencies, trueInDebug, \ | |
1165 "Exercise and verify the compilation dependency mechanism") \ | |
1166 \ | |
1167 develop(bool, TraceNewOopMapGeneration, false, \ | |
1168 "Trace OopMapGeneration") \ | |
1169 \ | |
1170 develop(bool, TraceNewOopMapGenerationDetailed, false, \ | |
1171 "Trace OopMapGeneration: print detailed cell states") \ | |
1172 \ | |
1173 develop(bool, TimeOopMap, false, \ | |
1174 "Time calls to GenerateOopMap::compute_map() in sum") \ | |
1175 \ | |
1176 develop(bool, TimeOopMap2, false, \ | |
1177 "Time calls to GenerateOopMap::compute_map() individually") \ | |
1178 \ | |
1179 develop(bool, TraceMonitorMismatch, false, \ | |
1180 "Trace monitor matching failures during OopMapGeneration") \ | |
1181 \ | |
1182 develop(bool, TraceOopMapRewrites, false, \ | |
1183 "Trace rewritting of method oops during oop map generation") \ | |
1184 \ | |
1185 develop(bool, TraceSafepoint, false, \ | |
1186 "Trace safepoint operations") \ | |
1187 \ | |
1188 develop(bool, TraceICBuffer, false, \ | |
1189 "Trace usage of IC buffer") \ | |
1190 \ | |
1191 develop(bool, TraceCompiledIC, false, \ | |
1192 "Trace changes of compiled IC") \ | |
1193 \ | |
1194 notproduct(bool, TraceZapDeadLocals, false, \ | |
1195 "Trace zapping dead locals") \ | |
1196 \ | |
1197 develop(bool, TraceStartupTime, false, \ | |
1198 "Trace setup time") \ | |
1199 \ | |
1200 develop(bool, TraceHPI, false, \ | |
1201 "Trace Host Porting Interface (HPI)") \ | |
1202 \ | |
1203 product(ccstr, HPILibPath, NULL, \ | |
1204 "Specify alternate path to HPI library") \ | |
1205 \ | |
1206 develop(bool, TraceProtectionDomainVerification, false, \ | |
1207 "Trace protection domain verifcation") \ | |
1208 \ | |
1209 develop(bool, TraceClearedExceptions, false, \ | |
1210 "Prints when an exception is forcibly cleared") \ | |
1211 \ | |
1212 product(bool, TraceClassResolution, false, \ | |
1213 "Trace all constant pool resolutions (for debugging)") \ | |
1214 \ | |
1215 product(bool, TraceBiasedLocking, false, \ | |
1216 "Trace biased locking in JVM") \ | |
1217 \ | |
1218 product(bool, TraceMonitorInflation, false, \ | |
1219 "Trace monitor inflation in JVM") \ | |
1220 \ | |
1221 /* assembler */ \ | |
1222 product(bool, Use486InstrsOnly, false, \ | |
1223 "Use 80486 Compliant instruction subset") \ | |
1224 \ | |
1225 /* gc */ \ | |
1226 \ | |
1227 product(bool, UseSerialGC, false, \ | |
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1228 "Use the serial garbage collector") \ |
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1229 \ |
1193
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1230 product(bool, UseG1GC, false, \ |
342
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1231 "Use the Garbage-First garbage collector") \ |
0 | 1232 \ |
1233 product(bool, UseParallelGC, false, \ | |
1234 "Use the Parallel Scavenge garbage collector") \ | |
1235 \ | |
1236 product(bool, UseParallelOldGC, false, \ | |
1237 "Use the Parallel Old garbage collector") \ | |
1238 \ | |
1239 product(bool, UseParallelOldGCCompacting, true, \ | |
1240 "In the Parallel Old garbage collector use parallel compaction") \ | |
1241 \ | |
1242 product(bool, UseParallelDensePrefixUpdate, true, \ | |
1243 "In the Parallel Old garbage collector use parallel dense" \ | |
1244 " prefix update") \ | |
1245 \ | |
1246 product(uintx, HeapMaximumCompactionInterval, 20, \ | |
1247 "How often should we maximally compact the heap (not allowing " \ | |
1248 "any dead space)") \ | |
1249 \ | |
1250 product(uintx, HeapFirstMaximumCompactionCount, 3, \ | |
1251 "The collection count for the first maximum compaction") \ | |
1252 \ | |
1253 product(bool, UseMaximumCompactionOnSystemGC, true, \ | |
1254 "In the Parallel Old garbage collector maximum compaction for " \ | |
1255 "a system GC") \ | |
1256 \ | |
1257 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ | |
1258 "The mean used by the par compact dead wood" \ | |
1259 "limiter (a number between 0-100).") \ | |
1260 \ | |
1261 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ | |
1262 "The standard deviation used by the par compact dead wood" \ | |
1263 "limiter (a number between 0-100).") \ | |
1264 \ | |
1265 product(bool, UseParallelOldGCDensePrefix, true, \ | |
1266 "Use a dense prefix with the Parallel Old garbage collector") \ | |
1267 \ | |
1268 product(uintx, ParallelGCThreads, 0, \ | |
1269 "Number of parallel threads parallel gc will use") \ | |
1270 \ | |
483
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1271 develop(bool, ParallelOldGCSplitALot, false, \ |
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1272 "Provoke splitting (copying data from a young gen space to" \ |
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|
1273 "multiple destination spaces)") \ |
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1274 \ |
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1275 develop(uintx, ParallelOldGCSplitInterval, 3, \ |
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1276 "How often to provoke splitting a young gen space") \ |
0 | 1277 \ |
375
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1278 develop(bool, TraceRegionTasksQueuing, false, \ |
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|
1279 "Trace the queuing of the region tasks") \ |
0 | 1280 \ |
1284 | 1281 product(uintx, ConcGCThreads, 0, \ |
1282 "Number of threads concurrent gc will use") \ | |
342
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1283 \ |
0 | 1284 product(uintx, YoungPLABSize, 4096, \ |
1285 "Size of young gen promotion labs (in HeapWords)") \ | |
1286 \ | |
1287 product(uintx, OldPLABSize, 1024, \ | |
1288 "Size of old gen promotion labs (in HeapWords)") \ | |
1289 \ | |
1290 product(uintx, GCTaskTimeStampEntries, 200, \ | |
1291 "Number of time stamp entries per gc worker thread") \ | |
1292 \ | |
1293 product(bool, AlwaysTenure, false, \ | |
1294 "Always tenure objects in eden. (ParallelGC only)") \ | |
1295 \ | |
1296 product(bool, NeverTenure, false, \ | |
1064 | 1297 "Never tenure objects in eden, May tenure on overflow " \ |
1298 "(ParallelGC only)") \ | |
0 | 1299 \ |
1300 product(bool, ScavengeBeforeFullGC, true, \ | |
1064 | 1301 "Scavenge youngest generation before each full GC, " \ |
1302 "used with UseParallelGC") \ | |
0 | 1303 \ |
1304 develop(bool, ScavengeWithObjectsInToSpace, false, \ | |
1305 "Allow scavenges to occur when to_space contains objects.") \ | |
1306 \ | |
1307 product(bool, UseConcMarkSweepGC, false, \ | |
1308 "Use Concurrent Mark-Sweep GC in the old generation") \ | |
1309 \ | |
1310 product(bool, ExplicitGCInvokesConcurrent, false, \ | |
1311 "A System.gc() request invokes a concurrent collection;" \ | |
1312 " (effective only when UseConcMarkSweepGC)") \ | |
1313 \ | |
1314 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ | |
1064 | 1315 "A System.gc() request invokes a concurrent collection and " \ |
1316 "also unloads classes during such a concurrent gc cycle " \ | |
1317 "(effective only when UseConcMarkSweepGC)") \ | |
0 | 1318 \ |
1520
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1319 product(bool, GCLockerInvokesConcurrent, false, \ |
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1320 "The exit of a JNI CS necessitating a scavenge also" \ |
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1321 " kicks off a bkgrd concurrent collection") \ |
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1322 \ |
0 | 1323 develop(bool, UseCMSAdaptiveFreeLists, true, \ |
1324 "Use Adaptive Free Lists in the CMS generation") \ | |
1325 \ | |
1326 develop(bool, UseAsyncConcMarkSweepGC, true, \ | |
1327 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ | |
1328 \ | |
1329 develop(bool, RotateCMSCollectionTypes, false, \ | |
1330 "Rotate the CMS collections among concurrent and STW") \ | |
1331 \ | |
1332 product(bool, UseCMSBestFit, true, \ | |
1333 "Use CMS best fit allocation strategy") \ | |
1334 \ | |
1335 product(bool, UseCMSCollectionPassing, true, \ | |
1336 "Use passing of collection from background to foreground") \ | |
1337 \ | |
1338 product(bool, UseParNewGC, false, \ | |
1339 "Use parallel threads in the new generation.") \ | |
1340 \ | |
1341 product(bool, ParallelGCVerbose, false, \ | |
1342 "Verbose output for parallel GC.") \ | |
1343 \ | |
1344 product(intx, ParallelGCBufferWastePct, 10, \ | |
1345 "wasted fraction of parallel allocation buffer.") \ | |
1346 \ | |
1347 product(bool, ParallelGCRetainPLAB, true, \ | |
1348 "Retain parallel allocation buffers across scavenges.") \ | |
1349 \ | |
1350 product(intx, TargetPLABWastePct, 10, \ | |
1351 "target wasted space in last buffer as pct of overall allocation")\ | |
1352 \ | |
1353 product(uintx, PLABWeight, 75, \ | |
1354 "Percentage (0-100) used to weight the current sample when" \ | |
1355 "computing exponentially decaying average for ResizePLAB.") \ | |
1356 \ | |
1357 product(bool, ResizePLAB, true, \ | |
1358 "Dynamically resize (survivor space) promotion labs") \ | |
1359 \ | |
1360 product(bool, PrintPLAB, false, \ | |
1361 "Print (survivor space) promotion labs sizing decisions") \ | |
1362 \ | |
1363 product(intx, ParGCArrayScanChunk, 50, \ | |
1364 "Scan a subset and push remainder, if array is bigger than this") \ | |
1365 \ | |
695 | 1366 product(bool, ParGCUseLocalOverflow, false, \ |
1367 "Instead of a global overflow list, use local overflow stacks") \ | |
1368 \ | |
679
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1369 product(bool, ParGCTrimOverflow, true, \ |
695 | 1370 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ |
679
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1371 \ |
534 | 1372 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ |
1373 "Whether we should simulate work queue overflow in ParNew") \ | |
1374 \ | |
1375 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ | |
1064 | 1376 "An `interval' counter that determines how frequently " \ |
1377 "we simulate overflow; a smaller number increases frequency") \ | |
534 | 1378 \ |
1379 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ | |
0 | 1380 "The desired number of objects to claim from the overflow list") \ |
1381 \ | |
1145
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1382 product(uintx, CMSParPromoteBlocksToClaim, 16, \ |
0 | 1383 "Number of blocks to attempt to claim when refilling CMS LAB for "\ |
1384 "parallel GC.") \ | |
1385 \ | |
1145
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1386 product(uintx, OldPLABWeight, 50, \ |
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1387 "Percentage (0-100) used to weight the current sample when" \ |
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1388 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ |
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1389 \ |
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1390 product(bool, ResizeOldPLAB, true, \ |
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1391 "Dynamically resize (old gen) promotion labs") \ |
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1392 \ |
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1393 product(bool, PrintOldPLAB, false, \ |
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1394 "Print (old gen) promotion labs sizing decisions") \ |
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1395 \ |
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1396 product(uintx, CMSOldPLABMin, 16, \ |
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1397 "Min size of CMS gen promotion lab caches per worker per blksize")\ |
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1398 \ |
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1399 product(uintx, CMSOldPLABMax, 1024, \ |
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1400 "Max size of CMS gen promotion lab caches per worker per blksize")\ |
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1401 \ |
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1402 product(uintx, CMSOldPLABNumRefills, 4, \ |
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1403 "Nominal number of refills of CMS gen promotion lab cache" \ |
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1404 " per worker per block size") \ |
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1405 \ |
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1406 product(bool, CMSOldPLABResizeQuicker, false, \ |
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1407 "Whether to react on-the-fly during a scavenge to a sudden" \ |
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1408 " change in block demand rate") \ |
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1409 \ |
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1410 product(uintx, CMSOldPLABToleranceFactor, 4, \ |
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1411 "The tolerance of the phase-change detector for on-the-fly" \ |
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1412 " PLAB resizing during a scavenge") \ |
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1413 \ |
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1414 product(uintx, CMSOldPLABReactivityFactor, 2, \ |
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1415 "The gain in the feedback loop for on-the-fly PLAB resizing" \ |
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1416 " during a scavenge") \ |
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1417 \ |
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1418 product(uintx, CMSOldPLABReactivityCeiling, 10, \ |
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1419 "The clamping of the gain in the feedback loop for on-the-fly" \ |
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1420 " PLAB resizing during a scavenge") \ |
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1421 \ |
0 | 1422 product(bool, AlwaysPreTouch, false, \ |
1423 "It forces all freshly committed pages to be pre-touched.") \ | |
1424 \ | |
1425 product(bool, CMSUseOldDefaults, false, \ | |
1064 | 1426 "A flag temporarily introduced to allow reverting to some " \ |
1427 "older default settings; older as of 6.0") \ | |
0 | 1428 \ |
1429 product(intx, CMSYoungGenPerWorker, 16*M, \ | |
1430 "The amount of young gen chosen by default per GC worker " \ | |
1064 | 1431 "thread available") \ |
0 | 1432 \ |
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1433 product(bool, GCOverheadReporting, false, \ |
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1434 "Enables the GC overhead reporting facility") \ |
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1435 \ |
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1436 product(intx, GCOverheadReportingPeriodMS, 100, \ |
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1437 "Reporting period for conc GC overhead reporting, in ms ") \ |
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1438 \ |
0 | 1439 product(bool, CMSIncrementalMode, false, \ |
1440 "Whether CMS GC should operate in \"incremental\" mode") \ | |
1441 \ | |
1442 product(uintx, CMSIncrementalDutyCycle, 10, \ | |
1443 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ | |
1444 "CMSIncrementalPacing is enabled, then this is just the initial" \ | |
1445 "value") \ | |
1446 \ | |
1447 product(bool, CMSIncrementalPacing, true, \ | |
1448 "Whether the CMS incremental mode duty cycle should be " \ | |
1449 "automatically adjusted") \ | |
1450 \ | |
1451 product(uintx, CMSIncrementalDutyCycleMin, 0, \ | |
1064 | 1452 "Lower bound on the duty cycle when CMSIncrementalPacing is " \ |
1453 "enabled (a percentage, 0-100)") \ | |
0 | 1454 \ |
1455 product(uintx, CMSIncrementalSafetyFactor, 10, \ | |
1064 | 1456 "Percentage (0-100) used to add conservatism when computing the " \ |
1457 "duty cycle") \ | |
0 | 1458 \ |
1459 product(uintx, CMSIncrementalOffset, 0, \ | |
1460 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ | |
1064 | 1461 " is shifted to the right within the period between young GCs") \ |
0 | 1462 \ |
1145
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1463 product(uintx, CMSExpAvgFactor, 50, \ |
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1464 "Percentage (0-100) used to weight the current sample when" \ |
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1465 "computing exponential averages for CMS statistics.") \ |
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1466 \ |
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1467 product(uintx, CMS_FLSWeight, 75, \ |
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1468 "Percentage (0-100) used to weight the current sample when" \ |
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1469 "computing exponentially decating averages for CMS FLS statistics.") \ |
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1470 \ |
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1471 product(uintx, CMS_FLSPadding, 1, \ |
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1472 "The multiple of deviation from mean to use for buffering" \ |
0 | 1473 "against volatility in free list demand.") \ |
1474 \ | |
1475 product(uintx, FLSCoalescePolicy, 2, \ | |
1476 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ | |
1477 \ | |
1145
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1478 product(bool, FLSAlwaysCoalesceLarge, false, \ |
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1479 "CMS: Larger free blocks are always available for coalescing") \ |
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1480 \ |
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1481 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ |
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1482 "CMS: the smaller the percentage the greater the coalition force")\ |
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1483 \ |
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1484 product(double, CMSSmallCoalSurplusPercent, 1.05, \ |
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1485 "CMS: the factor by which to inflate estimated demand of small" \ |
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1486 " block sizes to prevent coalescing with an adjoining block") \ |
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1487 \ |
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1488 product(double, CMSLargeCoalSurplusPercent, 0.95, \ |
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1489 "CMS: the factor by which to inflate estimated demand of large" \ |
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1490 " block sizes to prevent coalescing with an adjoining block") \ |
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|
1491 \ |
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1492 product(double, CMSSmallSplitSurplusPercent, 1.10, \ |
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1493 "CMS: the factor by which to inflate estimated demand of small" \ |
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1494 " block sizes to prevent splitting to supply demand for smaller" \ |
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1495 " blocks") \ |
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1496 \ |
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1497 product(double, CMSLargeSplitSurplusPercent, 1.00, \ |
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1498 "CMS: the factor by which to inflate estimated demand of large" \ |
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1499 " block sizes to prevent splitting to supply demand for smaller" \ |
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1500 " blocks") \ |
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1501 \ |
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1502 product(bool, CMSExtrapolateSweep, false, \ |
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1503 "CMS: cushion for block demand during sweep") \ |
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1504 \ |
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1505 product(uintx, CMS_SweepWeight, 75, \ |
1064 | 1506 "Percentage (0-100) used to weight the current sample when " \ |
1507 "computing exponentially decaying average for inter-sweep " \ | |
1508 "duration") \ | |
0 | 1509 \ |
1145
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1510 product(uintx, CMS_SweepPadding, 1, \ |
1064 | 1511 "The multiple of deviation from mean to use for buffering " \ |
0 | 1512 "against volatility in inter-sweep duration.") \ |
1513 \ | |
1514 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ | |
1515 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ | |
1064 | 1516 "duration exceeds this threhold in milliseconds") \ |
0 | 1517 \ |
1518 develop(bool, CMSTraceIncrementalMode, false, \ | |
1519 "Trace CMS incremental mode") \ | |
1520 \ | |
1521 develop(bool, CMSTraceIncrementalPacing, false, \ | |
1522 "Trace CMS incremental mode pacing computation") \ | |
1523 \ | |
1524 develop(bool, CMSTraceThreadState, false, \ | |
1525 "Trace the CMS thread state (enable the trace_state() method)") \ | |
1526 \ | |
1527 product(bool, CMSClassUnloadingEnabled, false, \ | |
1528 "Whether class unloading enabled when using CMS GC") \ | |
1529 \ | |
94
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1530 product(uintx, CMSClassUnloadingMaxInterval, 0, \ |
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1531 "When CMS class unloading is enabled, the maximum CMS cycle count"\ |
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1532 " for which classes may not be unloaded") \ |
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1533 \ |
0 | 1534 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ |
1535 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ | |
1536 \ | |
1537 product(bool, UseCMSCompactAtFullCollection, true, \ | |
1538 "Use mark sweep compact at full collections") \ | |
1539 \ | |
1540 product(uintx, CMSFullGCsBeforeCompaction, 0, \ | |
1541 "Number of CMS full collection done before compaction if > 0") \ | |
1542 \ | |
1543 develop(intx, CMSDictionaryChoice, 0, \ | |
1544 "Use BinaryTreeDictionary as default in the CMS generation") \ | |
1545 \ | |
1546 product(uintx, CMSIndexedFreeListReplenish, 4, \ | |
1777
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1547 "Replenish an indexed free list with this number of chunks") \ |
0 | 1548 \ |
1145
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1549 product(bool, CMSReplenishIntermediate, true, \ |
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1550 "Replenish all intermediate free-list caches") \ |
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1551 \ |
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1552 product(bool, CMSSplitIndexedFreeListBlocks, true, \ |
1777
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1553 "When satisfying batched demand, split blocks from the " \ |
1145
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1554 "IndexedFreeList whose size is a multiple of requested size") \ |
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1555 \ |
0 | 1556 product(bool, CMSLoopWarn, false, \ |
1557 "Warn in case of excessive CMS looping") \ | |
1558 \ | |
1559 develop(bool, CMSOverflowEarlyRestoration, false, \ | |
1560 "Whether preserved marks should be restored early") \ | |
1561 \ | |
1284 | 1562 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ |
1563 "Size of marking stack") \ | |
1564 \ | |
1565 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ | |
1566 "Max size of marking stack") \ | |
0 | 1567 \ |
1568 notproduct(bool, CMSMarkStackOverflowALot, false, \ | |
1569 "Whether we should simulate frequent marking stack / work queue" \ | |
1570 " overflow") \ | |
1571 \ | |
534 | 1572 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ |
1573 "An `interval' counter that determines how frequently" \ | |
0 | 1574 " we simulate overflow; a smaller number increases frequency") \ |
1575 \ | |
1576 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ | |
1577 "(Temporary, subject to experimentation)" \ | |
1578 "Maximum number of abortable preclean iterations, if > 0") \ | |
1579 \ | |
1580 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ | |
1581 "(Temporary, subject to experimentation)" \ | |
1582 "Maximum time in abortable preclean in ms") \ | |
1583 \ | |
1584 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ | |
1585 "(Temporary, subject to experimentation)" \ | |
1586 "Nominal minimum work per abortable preclean iteration") \ | |
1587 \ | |
1887
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1588 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ |
0 | 1589 "(Temporary, subject to experimentation)" \ |
1590 " Time that we sleep between iterations when not given" \ | |
1591 " enough work per iteration") \ | |
1592 \ | |
1593 product(uintx, CMSRescanMultiple, 32, \ | |
1594 "Size (in cards) of CMS parallel rescan task") \ | |
1595 \ | |
1596 product(uintx, CMSConcMarkMultiple, 32, \ | |
1597 "Size (in cards) of CMS concurrent MT marking task") \ | |
1598 \ | |
1599 product(uintx, CMSRevisitStackSize, 1*M, \ | |
1600 "Size of CMS KlassKlass revisit stack") \ | |
1601 \ | |
1602 product(bool, CMSAbortSemantics, false, \ | |
1603 "Whether abort-on-overflow semantics is implemented") \ | |
1604 \ | |
1605 product(bool, CMSParallelRemarkEnabled, true, \ | |
1606 "Whether parallel remark enabled (only if ParNewGC)") \ | |
1607 \ | |
1608 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ | |
1609 "Whether parallel remark of survivor space" \ | |
1610 " enabled (effective only if CMSParallelRemarkEnabled)") \ | |
1611 \ | |
1612 product(bool, CMSPLABRecordAlways, true, \ | |
1613 "Whether to always record survivor space PLAB bdries" \ | |
1614 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ | |
1615 \ | |
1616 product(bool, CMSConcurrentMTEnabled, true, \ | |
1617 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ | |
1618 \ | |
1619 product(bool, CMSPermGenPrecleaningEnabled, true, \ | |
1620 "Whether concurrent precleaning enabled in perm gen" \ | |
1621 " (effective only when CMSPrecleaningEnabled is true)") \ | |
1622 \ | |
1623 product(bool, CMSPrecleaningEnabled, true, \ | |
1624 "Whether concurrent precleaning enabled") \ | |
1625 \ | |
1626 product(uintx, CMSPrecleanIter, 3, \ | |
1627 "Maximum number of precleaning iteration passes") \ | |
1628 \ | |
1629 product(uintx, CMSPrecleanNumerator, 2, \ | |
1630 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ | |
1631 " ratio") \ | |
1632 \ | |
1633 product(uintx, CMSPrecleanDenominator, 3, \ | |
1634 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ | |
1635 " ratio") \ | |
1636 \ | |
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1637 product(bool, CMSPrecleanRefLists1, true, \ |
0 | 1638 "Preclean ref lists during (initial) preclean phase") \ |
1639 \ | |
1640 product(bool, CMSPrecleanRefLists2, false, \ | |
1641 "Preclean ref lists during abortable preclean phase") \ | |
1642 \ | |
1643 product(bool, CMSPrecleanSurvivors1, false, \ | |
1644 "Preclean survivors during (initial) preclean phase") \ | |
1645 \ | |
1646 product(bool, CMSPrecleanSurvivors2, true, \ | |
1647 "Preclean survivors during abortable preclean phase") \ | |
1648 \ | |
1649 product(uintx, CMSPrecleanThreshold, 1000, \ | |
1650 "Don't re-iterate if #dirty cards less than this") \ | |
1651 \ | |
1652 product(bool, CMSCleanOnEnter, true, \ | |
1653 "Clean-on-enter optimization for reducing number of dirty cards") \ | |
1654 \ | |
1655 product(uintx, CMSRemarkVerifyVariant, 1, \ | |
1656 "Choose variant (1,2) of verification following remark") \ | |
1657 \ | |
1658 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ | |
1659 "If Eden used is below this value, don't try to schedule remark") \ | |
1660 \ | |
1661 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ | |
1662 "The Eden occupancy % at which to try and schedule remark pause") \ | |
1663 \ | |
1664 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ | |
1665 "Start sampling Eden top at least before yg occupancy reaches" \ | |
1666 " 1/<ratio> of the size at which we plan to schedule remark") \ | |
1667 \ | |
1668 product(uintx, CMSSamplingGrain, 16*K, \ | |
1669 "The minimum distance between eden samples for CMS (see above)") \ | |
1670 \ | |
1671 product(bool, CMSScavengeBeforeRemark, false, \ | |
1672 "Attempt scavenge before the CMS remark step") \ | |
1673 \ | |
1674 develop(bool, CMSTraceSweeper, false, \ | |
1675 "Trace some actions of the CMS sweeper") \ | |
1676 \ | |
1677 product(uintx, CMSWorkQueueDrainThreshold, 10, \ | |
1678 "Don't drain below this size per parallel worker/thief") \ | |
1679 \ | |
1887
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1680 manageable(intx, CMSWaitDuration, 2000, \ |
0 | 1681 "Time in milliseconds that CMS thread waits for young GC") \ |
1682 \ | |
1683 product(bool, CMSYield, true, \ | |
1684 "Yield between steps of concurrent mark & sweep") \ | |
1685 \ | |
1686 product(uintx, CMSBitMapYieldQuantum, 10*M, \ | |
1687 "Bitmap operations should process at most this many bits" \ | |
1688 "between yields") \ | |
1689 \ | |
1145
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1690 product(bool, CMSDumpAtPromotionFailure, false, \ |
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1691 "Dump useful information about the state of the CMS old " \ |
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|
1692 " generation upon a promotion failure.") \ |
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1693 \ |
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1694 product(bool, CMSPrintChunksInDump, false, \ |
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1695 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ |
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1696 " more detailed information about the free chunks.") \ |
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|
1697 \ |
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1698 product(bool, CMSPrintObjectsInDump, false, \ |
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1699 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ |
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1700 " more detailed information about the allocated objects.") \ |
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|
1701 \ |
0 | 1702 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ |
1703 "Verify that all refs across the FLS boundary " \ | |
1704 " are to valid objects") \ | |
1705 \ | |
1706 diagnostic(bool, FLSVerifyLists, false, \ | |
1707 "Do lots of (expensive) FreeListSpace verification") \ | |
1708 \ | |
1709 diagnostic(bool, FLSVerifyIndexTable, false, \ | |
1710 "Do lots of (expensive) FLS index table verification") \ | |
1711 \ | |
1712 develop(bool, FLSVerifyDictionary, false, \ | |
1713 "Do lots of (expensive) FLS dictionary verification") \ | |
1714 \ | |
1715 develop(bool, VerifyBlockOffsetArray, false, \ | |
1716 "Do (expensive!) block offset array verification") \ | |
1717 \ | |
1716
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1718 product(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ |
0 | 1719 "Maintain _unallocated_block in BlockOffsetArray" \ |
1720 " (currently applicable only to CMS collector)") \ | |
1721 \ | |
1722 develop(bool, TraceCMSState, false, \ | |
1723 "Trace the state of the CMS collection") \ | |
1724 \ | |
1725 product(intx, RefDiscoveryPolicy, 0, \ | |
1726 "Whether reference-based(0) or referent-based(1)") \ | |
1727 \ | |
1728 product(bool, ParallelRefProcEnabled, false, \ | |
1729 "Enable parallel reference processing whenever possible") \ | |
1730 \ | |
1731 product(bool, ParallelRefProcBalancingEnabled, true, \ | |
1732 "Enable balancing of reference processing queues") \ | |
1733 \ | |
1734 product(intx, CMSTriggerRatio, 80, \ | |
1735 "Percentage of MinHeapFreeRatio in CMS generation that is " \ | |
1064 | 1736 "allocated before a CMS collection cycle commences") \ |
0 | 1737 \ |
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1738 product(intx, CMSTriggerPermRatio, 80, \ |
1064 | 1739 "Percentage of MinHeapFreeRatio in the CMS perm generation that " \ |
1740 "is allocated before a CMS collection cycle commences, that " \ | |
1741 "also collects the perm generation") \ | |
94
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1742 \ |
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1743 product(uintx, CMSBootstrapOccupancy, 50, \ |
0 | 1744 "Percentage CMS generation occupancy at which to " \ |
1064 | 1745 "initiate CMS collection for bootstrapping collection stats") \ |
0 | 1746 \ |
1747 product(intx, CMSInitiatingOccupancyFraction, -1, \ | |
1748 "Percentage CMS generation occupancy to start a CMS collection " \ | |
1064 | 1749 "cycle. A negative value means that CMSTriggerRatio is used") \ |
94
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1750 \ |
1283
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1751 product(uintx, InitiatingHeapOccupancyPercent, 45, \ |
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1752 "Percentage of the (entire) heap occupancy to start a " \ |
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1753 "concurrent GC cycle. It us used by GCs that trigger a " \ |
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1754 "concurrent GC cycle based on the occupancy of the entire heap, " \ |
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1755 "not just one of the generations (e.g., G1). A value of 0 " \ |
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|
1756 "denotes 'do constant GC cycles'.") \ |
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1757 \ |
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1758 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ |
1064 | 1759 "Percentage CMS perm generation occupancy to start a " \ |
1760 "CMScollection cycle. A negative value means that " \ | |
1761 "CMSTriggerPermRatio is used") \ | |
0 | 1762 \ |
1763 product(bool, UseCMSInitiatingOccupancyOnly, false, \ | |
1764 "Only use occupancy as a crierion for starting a CMS collection") \ | |
1765 \ | |
94
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1766 product(intx, CMSIsTooFullPercentage, 98, \ |
1064 | 1767 "An absolute ceiling above which CMS will always consider the " \ |
1768 "perm gen ripe for collection") \ | |
94
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1769 \ |
0 | 1770 develop(bool, CMSTestInFreeList, false, \ |
1771 "Check if the coalesced range is already in the " \ | |
1064 | 1772 "free lists as claimed") \ |
0 | 1773 \ |
1774 notproduct(bool, CMSVerifyReturnedBytes, false, \ | |
1775 "Check that all the garbage collected was returned to the " \ | |
1776 "free lists.") \ | |
1777 \ | |
1778 notproduct(bool, ScavengeALot, false, \ | |
1779 "Force scavenge at every Nth exit from the runtime system " \ | |
1780 "(N=ScavengeALotInterval)") \ | |
1781 \ | |
1782 develop(bool, FullGCALot, false, \ | |
1783 "Force full gc at every Nth exit from the runtime system " \ | |
1784 "(N=FullGCALotInterval)") \ | |
1785 \ | |
1786 notproduct(bool, GCALotAtAllSafepoints, false, \ | |
1787 "Enforce ScavengeALot/GCALot at all potential safepoints") \ | |
1788 \ | |
1145
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1789 product(bool, PrintPromotionFailure, false, \ |
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1790 "Print additional diagnostic information following " \ |
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1791 " promotion failure") \ |
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1792 \ |
0 | 1793 notproduct(bool, PromotionFailureALot, false, \ |
1794 "Use promotion failure handling on every youngest generation " \ | |
1795 "collection") \ | |
1796 \ | |
1797 develop(uintx, PromotionFailureALotCount, 1000, \ | |
1798 "Number of promotion failures occurring at ParGCAllocBuffer" \ | |
1799 "refill attempts (ParNew) or promotion attempts " \ | |
1800 "(other young collectors) ") \ | |
1801 \ | |
1802 develop(uintx, PromotionFailureALotInterval, 5, \ | |
1803 "Total collections between promotion failures alot") \ | |
1804 \ | |
1837
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1805 experimental(intx, WorkStealingSleepMillis, 1, \ |
0 | 1806 "Sleep time when sleep is used for yields") \ |
1807 \ | |
1837
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diff
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|
1808 experimental(uintx, WorkStealingYieldsBeforeSleep, 1000, \ |
0 | 1809 "Number of yields before a sleep is done during workstealing") \ |
1810 \ | |
1837
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1836
diff
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|
1811 experimental(uintx, WorkStealingHardSpins, 4096, \ |
546
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6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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541
diff
changeset
|
1812 "Number of iterations in a spin loop between checks on " \ |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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541
diff
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|
1813 "time out of hard spin") \ |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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541
diff
changeset
|
1814 \ |
1837
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diff
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|
1815 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ |
546
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|
1816 "Ratio of hard spins to calls to yield") \ |
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6690928: Use spinning in combination with yields for workstealing termination.
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diff
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|
1817 \ |
534 | 1818 product(uintx, PreserveMarkStackSize, 1024, \ |
1064 | 1819 "Size for stack used in promotion failure handling") \ |
0 | 1820 \ |
1311
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|
1821 develop(uintx, ObjArrayMarkingStride, 512, \ |
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diff
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|
1822 "Number of ObjArray elements to push onto the marking stack" \ |
2a1472c30599
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jcoomes
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diff
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|
1823 "before pushing a continuation entry") \ |
2a1472c30599
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|
1824 \ |
0 | 1825 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ |
1826 \ | |
1827 product_pd(bool, ResizeTLAB, \ | |
1828 "Dynamically resize tlab size for threads") \ | |
1829 \ | |
1830 product(bool, ZeroTLAB, false, \ | |
1831 "Zero out the newly created TLAB") \ | |
1832 \ | |
342
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diff
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|
1833 product(bool, FastTLABRefill, true, \ |
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142
diff
changeset
|
1834 "Use fast TLAB refill code") \ |
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|
1835 \ |
0 | 1836 product(bool, PrintTLAB, false, \ |
1837 "Print various TLAB related information") \ | |
1838 \ | |
1839 product(bool, TLABStats, true, \ | |
1840 "Print various TLAB related information") \ | |
1841 \ | |
941 | 1842 product(bool, PrintRevisitStats, false, \ |
1843 "Print revisit (klass and MDO) stack related information") \ | |
1844 \ | |
0 | 1845 product_pd(bool, NeverActAsServerClassMachine, \ |
1846 "Never act like a server-class machine") \ | |
1847 \ | |
1848 product(bool, AlwaysActAsServerClassMachine, false, \ | |
1849 "Always act like a server-class machine") \ | |
1850 \ | |
1064 | 1851 product_pd(uint64_t, MaxRAM, \ |
1852 "Real memory size (in bytes) used to set maximum heap size") \ | |
1853 \ | |
1854 product(uintx, ErgoHeapSizeLimit, 0, \ | |
1855 "Maximum ergonomically set heap size (in bytes); zero means use " \ | |
1856 "MaxRAM / MaxRAMFraction") \ | |
1857 \ | |
1858 product(uintx, MaxRAMFraction, 4, \ | |
1859 "Maximum fraction (1/n) of real memory used for maximum heap " \ | |
1860 "size") \ | |
0 | 1861 \ |
1862 product(uintx, DefaultMaxRAMFraction, 4, \ | |
1064 | 1863 "Maximum fraction (1/n) of real memory used for maximum heap " \ |
1864 "size; deprecated: to be renamed to MaxRAMFraction") \ | |
1865 \ | |
1866 product(uintx, MinRAMFraction, 2, \ | |
1867 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ | |
1868 "size on systems with small physical memory size") \ | |
1869 \ | |
1870 product(uintx, InitialRAMFraction, 64, \ | |
1871 "Fraction (1/n) of real memory used for initial heap size") \ | |
0 | 1872 \ |
1873 product(bool, UseAutoGCSelectPolicy, false, \ | |
1874 "Use automatic collection selection policy") \ | |
1875 \ | |
1876 product(uintx, AutoGCSelectPauseMillis, 5000, \ | |
1877 "Automatic GC selection pause threshhold in ms") \ | |
1878 \ | |
1879 product(bool, UseAdaptiveSizePolicy, true, \ | |
1880 "Use adaptive generation sizing policies") \ | |
1881 \ | |
1882 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ | |
1883 "Use adaptive survivor sizing policies") \ | |
1884 \ | |
1885 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ | |
1886 "Use adaptive young-old sizing policies at minor collections") \ | |
1887 \ | |
1888 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ | |
1889 "Use adaptive young-old sizing policies at major collections") \ | |
1890 \ | |
1891 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ | |
1892 "Use statistics from System.GC for adaptive size policy") \ | |
1893 \ | |
1894 product(bool, UseAdaptiveGCBoundary, false, \ | |
1895 "Allow young-old boundary to move") \ | |
1896 \ | |
1897 develop(bool, TraceAdaptiveGCBoundary, false, \ | |
1898 "Trace young-old boundary moves") \ | |
1899 \ | |
1900 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ | |
1901 "Resize the virtual spaces of the young or old generations") \ | |
1902 \ | |
1903 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ | |
1904 "Policy for changeing generation size for throughput goals") \ | |
1905 \ | |
1906 product(uintx, AdaptiveSizePausePolicy, 0, \ | |
1907 "Policy for changing generation size for pause goals") \ | |
1908 \ | |
1909 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ | |
1910 "Adjust tenured generation to achive a minor pause goal") \ | |
1911 \ | |
1912 develop(bool, PSAdjustYoungGenForMajorPause, false, \ | |
1913 "Adjust young generation to achive a major pause goal") \ | |
1914 \ | |
1915 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ | |
1916 "Number of steps where heuristics is used before data is used") \ | |
1917 \ | |
1918 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ | |
1919 "Number of collections before the adaptive sizing is started") \ | |
1920 \ | |
1921 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ | |
1064 | 1922 "Collecton interval for printing information; zero => never") \ |
0 | 1923 \ |
1924 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ | |
1925 "Use adaptive minimum footprint as a goal") \ | |
1926 \ | |
1927 product(uintx, AdaptiveSizePolicyWeight, 10, \ | |
1928 "Weight given to exponential resizing, between 0 and 100") \ | |
1929 \ | |
1930 product(uintx, AdaptiveTimeWeight, 25, \ | |
1931 "Weight given to time in adaptive policy, between 0 and 100") \ | |
1932 \ | |
1933 product(uintx, PausePadding, 1, \ | |
1934 "How much buffer to keep for pause time") \ | |
1935 \ | |
1936 product(uintx, PromotedPadding, 3, \ | |
1937 "How much buffer to keep for promotion failure") \ | |
1938 \ | |
1939 product(uintx, SurvivorPadding, 3, \ | |
1940 "How much buffer to keep for survivor overflow") \ | |
1941 \ | |
1942 product(uintx, AdaptivePermSizeWeight, 20, \ | |
1943 "Weight for perm gen exponential resizing, between 0 and 100") \ | |
1944 \ | |
1945 product(uintx, PermGenPadding, 3, \ | |
1946 "How much buffer to keep for perm gen sizing") \ | |
1947 \ | |
1948 product(uintx, ThresholdTolerance, 10, \ | |
1949 "Allowed collection cost difference between generations") \ | |
1950 \ | |
1951 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ | |
1064 | 1952 "If collection costs are within margin, reduce both by full " \ |
1953 "delta") \ | |
0 | 1954 \ |
1955 product(uintx, YoungGenerationSizeIncrement, 20, \ | |
1956 "Adaptive size percentage change in young generation") \ | |
1957 \ | |
1958 product(uintx, YoungGenerationSizeSupplement, 80, \ | |
1959 "Supplement to YoungedGenerationSizeIncrement used at startup") \ | |
1960 \ | |
1961 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ | |
1962 "Decay factor to YoungedGenerationSizeSupplement") \ | |
1963 \ | |
1964 product(uintx, TenuredGenerationSizeIncrement, 20, \ | |
1965 "Adaptive size percentage change in tenured generation") \ | |
1966 \ | |
1967 product(uintx, TenuredGenerationSizeSupplement, 80, \ | |
1968 "Supplement to TenuredGenerationSizeIncrement used at startup") \ | |
1969 \ | |
1970 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ | |
1971 "Decay factor to TenuredGenerationSizeIncrement") \ | |
1972 \ | |
1783 | 1973 product(uintx, MaxGCPauseMillis, max_uintx, \ |
751 | 1974 "Adaptive size policy maximum GC pause time goal in msec, " \ |
1975 "or (G1 Only) the max. GC time per MMU time slice") \ | |
1976 \ | |
1610
79107c3a6bd5
6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
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parents:
1589
diff
changeset
|
1977 product(uintx, GCPauseIntervalMillis, 0, \ |
751 | 1978 "Time slice for MMU specification") \ |
0 | 1979 \ |
1980 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ | |
1981 "Adaptive size policy maximum GC minor pause time goal in msec") \ | |
1982 \ | |
1983 product(uintx, GCTimeRatio, 99, \ | |
1984 "Adaptive size policy application time to GC time ratio") \ | |
1985 \ | |
1986 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ | |
1987 "Adaptive size scale down factor for shrinking") \ | |
1988 \ | |
1989 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ | |
1990 "Adaptive size decays the major cost for long major intervals") \ | |
1991 \ | |
1992 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ | |
1993 "Time scale over which major costs decay") \ | |
1994 \ | |
1995 product(uintx, MinSurvivorRatio, 3, \ | |
1996 "Minimum ratio of young generation/survivor space size") \ | |
1997 \ | |
1998 product(uintx, InitialSurvivorRatio, 8, \ | |
1999 "Initial ratio of eden/survivor space size") \ | |
2000 \ | |
2001 product(uintx, BaseFootPrintEstimate, 256*M, \ | |
2002 "Estimate of footprint other than Java Heap") \ | |
2003 \ | |
2004 product(bool, UseGCOverheadLimit, true, \ | |
2005 "Use policy to limit of proportion of time spent in GC " \ | |
2006 "before an OutOfMemory error is thrown") \ | |
2007 \ | |
2008 product(uintx, GCTimeLimit, 98, \ | |
2009 "Limit of proportion of time spent in GC before an OutOfMemory" \ | |
2010 "error is thrown (used with GCHeapFreeLimit)") \ | |
2011 \ | |
2012 product(uintx, GCHeapFreeLimit, 2, \ | |
2013 "Minimum percentage of free space after a full GC before an " \ | |
2014 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ | |
2015 \ | |
2016 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ | |
2017 "Number of consecutive collections before gc time limit fires") \ | |
2018 \ | |
2019 product(bool, PrintAdaptiveSizePolicy, false, \ | |
2020 "Print information about AdaptiveSizePolicy") \ | |
2021 \ | |
2022 product(intx, PrefetchCopyIntervalInBytes, -1, \ | |
2023 "How far ahead to prefetch destination area (<= 0 means off)") \ | |
2024 \ | |
2025 product(intx, PrefetchScanIntervalInBytes, -1, \ | |
2026 "How far ahead to prefetch scan area (<= 0 means off)") \ | |
2027 \ | |
2028 product(intx, PrefetchFieldsAhead, -1, \ | |
2029 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ | |
2030 \ | |
2031 develop(bool, UsePrefetchQueue, true, \ | |
2032 "Use the prefetch queue during PS promotion") \ | |
2033 \ | |
2034 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ | |
2035 "Verify system before exiting") \ | |
2036 \ | |
2037 diagnostic(bool, VerifyBeforeGC, false, \ | |
2038 "Verify memory system before GC") \ | |
2039 \ | |
2040 diagnostic(bool, VerifyAfterGC, false, \ | |
2041 "Verify memory system after GC") \ | |
2042 \ | |
2043 diagnostic(bool, VerifyDuringGC, false, \ | |
2044 "Verify memory system during GC (between phases)") \ | |
2045 \ | |
390 | 2046 diagnostic(bool, GCParallelVerificationEnabled, true, \ |
2047 "Enable parallel memory system verification") \ | |
2048 \ | |
1166 | 2049 diagnostic(bool, DeferInitialCardMark, false, \ |
2050 "When +ReduceInitialCardMarks, explicitly defer any that " \ | |
2051 "may arise from new_pre_store_barrier") \ | |
2052 \ | |
0 | 2053 diagnostic(bool, VerifyRememberedSets, false, \ |
2054 "Verify GC remembered sets") \ | |
2055 \ | |
2056 diagnostic(bool, VerifyObjectStartArray, true, \ | |
2057 "Verify GC object start array if verify before/after") \ | |
2058 \ | |
2059 product(bool, DisableExplicitGC, false, \ | |
2060 "Tells whether calling System.gc() does a full GC") \ | |
2061 \ | |
2062 notproduct(bool, CheckMemoryInitialization, false, \ | |
2063 "Checks memory initialization") \ | |
2064 \ | |
2065 product(bool, CollectGen0First, false, \ | |
2066 "Collect youngest generation before each full GC") \ | |
2067 \ | |
2068 diagnostic(bool, BindCMSThreadToCPU, false, \ | |
2069 "Bind CMS Thread to CPU if possible") \ | |
2070 \ | |
2071 diagnostic(uintx, CPUForCMSThread, 0, \ | |
2072 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ | |
2073 \ | |
2074 product(bool, BindGCTaskThreadsToCPUs, false, \ | |
2075 "Bind GCTaskThreads to CPUs if possible") \ | |
2076 \ | |
2077 product(bool, UseGCTaskAffinity, false, \ | |
2078 "Use worker affinity when asking for GCTasks") \ | |
2079 \ | |
2080 product(uintx, ProcessDistributionStride, 4, \ | |
2081 "Stride through processors when distributing processes") \ | |
2082 \ | |
2083 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ | |
2084 "number of times the coordinator GC thread will sleep while " \ | |
2085 "yielding before giving up and resuming GC") \ | |
2086 \ | |
2087 product(uintx, CMSYieldSleepCount, 0, \ | |
2088 "number of times a GC thread (minus the coordinator) " \ | |
2089 "will sleep while yielding before giving up and resuming GC") \ | |
2090 \ | |
2091 /* gc tracing */ \ | |
2092 manageable(bool, PrintGC, false, \ | |
2093 "Print message at garbage collect") \ | |
2094 \ | |
2095 manageable(bool, PrintGCDetails, false, \ | |
2096 "Print more details at garbage collect") \ | |
2097 \ | |
2098 manageable(bool, PrintGCDateStamps, false, \ | |
2099 "Print date stamps at garbage collect") \ | |
2100 \ | |
2101 manageable(bool, PrintGCTimeStamps, false, \ | |
2102 "Print timestamps at garbage collect") \ | |
2103 \ | |
2104 product(bool, PrintGCTaskTimeStamps, false, \ | |
2105 "Print timestamps for individual gc worker thread tasks") \ | |
2106 \ | |
2107 develop(intx, ConcGCYieldTimeout, 0, \ | |
2108 "If non-zero, assert that GC threads yield within this # of ms.") \ | |
2109 \ | |
2110 notproduct(bool, TraceMarkSweep, false, \ | |
2111 "Trace mark sweep") \ | |
2112 \ | |
2113 product(bool, PrintReferenceGC, false, \ | |
2114 "Print times spent handling reference objects during GC " \ | |
2115 " (enabled only when PrintGCDetails)") \ | |
2116 \ | |
2117 develop(bool, TraceReferenceGC, false, \ | |
2118 "Trace handling of soft/weak/final/phantom references") \ | |
2119 \ | |
2120 develop(bool, TraceFinalizerRegistration, false, \ | |
2121 "Trace registration of final references") \ | |
2122 \ | |
2123 notproduct(bool, TraceScavenge, false, \ | |
2124 "Trace scavenge") \ | |
2125 \ | |
2126 product_rw(bool, TraceClassLoading, false, \ | |
2127 "Trace all classes loaded") \ | |
2128 \ | |
2129 product(bool, TraceClassLoadingPreorder, false, \ | |
2130 "Trace all classes loaded in order referenced (not loaded)") \ | |
2131 \ | |
2132 product_rw(bool, TraceClassUnloading, false, \ | |
2133 "Trace unloading of classes") \ | |
2134 \ | |
2135 product_rw(bool, TraceLoaderConstraints, false, \ | |
2136 "Trace loader constraints") \ | |
2137 \ | |
2138 product(bool, TraceGen0Time, false, \ | |
2139 "Trace accumulated time for Gen 0 collection") \ | |
2140 \ | |
2141 product(bool, TraceGen1Time, false, \ | |
2142 "Trace accumulated time for Gen 1 collection") \ | |
2143 \ | |
2144 product(bool, PrintTenuringDistribution, false, \ | |
2145 "Print tenuring age information") \ | |
2146 \ | |
2147 product_rw(bool, PrintHeapAtGC, false, \ | |
2148 "Print heap layout before and after each GC") \ | |
2149 \ | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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779
diff
changeset
|
2150 product_rw(bool, PrintHeapAtGCExtended, false, \ |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
779
diff
changeset
|
2151 "Prints extended information about the layout of the heap " \ |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
779
diff
changeset
|
2152 "when -XX:+PrintHeapAtGC is set") \ |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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779
diff
changeset
|
2153 \ |
0 | 2154 product(bool, PrintHeapAtSIGBREAK, true, \ |
2155 "Print heap layout in response to SIGBREAK") \ | |
2156 \ | |
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
570
diff
changeset
|
2157 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
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parents:
570
diff
changeset
|
2158 "Print a class histogram before any major stop-world GC") \ |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
570
diff
changeset
|
2159 \ |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
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parents:
570
diff
changeset
|
2160 manageable(bool, PrintClassHistogramAfterFullGC, false, \ |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
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570
diff
changeset
|
2161 "Print a class histogram after any major stop-world GC") \ |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
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570
diff
changeset
|
2162 \ |
0 | 2163 manageable(bool, PrintClassHistogram, false, \ |
2164 "Print a histogram of class instances") \ | |
2165 \ | |
2166 develop(bool, TraceWorkGang, false, \ | |
2167 "Trace activities of work gangs") \ | |
2168 \ | |
2169 product(bool, TraceParallelOldGCTasks, false, \ | |
2170 "Trace multithreaded GC activity") \ | |
2171 \ | |
2172 develop(bool, TraceBlockOffsetTable, false, \ | |
2173 "Print BlockOffsetTable maps") \ | |
2174 \ | |
2175 develop(bool, TraceCardTableModRefBS, false, \ | |
2176 "Print CardTableModRefBS maps") \ | |
2177 \ | |
2178 develop(bool, TraceGCTaskManager, false, \ | |
2179 "Trace actions of the GC task manager") \ | |
2180 \ | |
2181 develop(bool, TraceGCTaskQueue, false, \ | |
2182 "Trace actions of the GC task queues") \ | |
2183 \ | |
2184 develop(bool, TraceGCTaskThread, false, \ | |
2185 "Trace actions of the GC task threads") \ | |
2186 \ | |
2187 product(bool, PrintParallelOldGCPhaseTimes, false, \ | |
2188 "Print the time taken by each parallel old gc phase." \ | |
2189 "PrintGCDetails must also be enabled.") \ | |
2190 \ | |
2191 develop(bool, TraceParallelOldGCMarkingPhase, false, \ | |
2192 "Trace parallel old gc marking phase") \ | |
2193 \ | |
2194 develop(bool, TraceParallelOldGCSummaryPhase, false, \ | |
2195 "Trace parallel old gc summary phase") \ | |
2196 \ | |
2197 develop(bool, TraceParallelOldGCCompactionPhase, false, \ | |
2198 "Trace parallel old gc compaction phase") \ | |
2199 \ | |
2200 develop(bool, TraceParallelOldGCDensePrefix, false, \ | |
2201 "Trace parallel old gc dense prefix computation") \ | |
2202 \ | |
2203 develop(bool, IgnoreLibthreadGPFault, false, \ | |
2204 "Suppress workaround for libthread GP fault") \ | |
2205 \ | |
139
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diff
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|
2206 product(bool, PrintJNIGCStalls, false, \ |
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
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95
diff
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|
2207 "Print diagnostic message when GC is stalled" \ |
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
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95
diff
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|
2208 "by JNI critical section") \ |
c0492d52d55b
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apetrusenko
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95
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|
2209 \ |
0 | 2210 /* JVMTI heap profiling */ \ |
2211 \ | |
2212 diagnostic(bool, TraceJVMTIObjectTagging, false, \ | |
2213 "Trace JVMTI object tagging calls") \ | |
2214 \ | |
2215 diagnostic(bool, VerifyBeforeIteration, false, \ | |
2216 "Verify memory system before JVMTI iteration") \ | |
2217 \ | |
2218 /* compiler interface */ \ | |
2219 \ | |
2220 develop(bool, CIPrintCompilerName, false, \ | |
2221 "when CIPrint is active, print the name of the active compiler") \ | |
2222 \ | |
2223 develop(bool, CIPrintCompileQueue, false, \ | |
2224 "display the contents of the compile queue whenever a " \ | |
2225 "compilation is enqueued") \ | |
2226 \ | |
2227 develop(bool, CIPrintRequests, false, \ | |
2228 "display every request for compilation") \ | |
2229 \ | |
2230 product(bool, CITime, false, \ | |
2231 "collect timing information for compilation") \ | |
2232 \ | |
2233 develop(bool, CITimeEach, false, \ | |
2234 "display timing information after each successful compilation") \ | |
2235 \ | |
2236 develop(bool, CICountOSR, true, \ | |
2237 "use a separate counter when assigning ids to osr compilations") \ | |
2238 \ | |
2239 develop(bool, CICompileNatives, true, \ | |
2240 "compile native methods if supported by the compiler") \ | |
2241 \ | |
2242 develop_pd(bool, CICompileOSR, \ | |
2243 "compile on stack replacement methods if supported by the " \ | |
2244 "compiler") \ | |
2245 \ | |
2246 develop(bool, CIPrintMethodCodes, false, \ | |
2247 "print method bytecodes of the compiled code") \ | |
2248 \ | |
2249 develop(bool, CIPrintTypeFlow, false, \ | |
2250 "print the results of ciTypeFlow analysis") \ | |
2251 \ | |
2252 develop(bool, CITraceTypeFlow, false, \ | |
2253 "detailed per-bytecode tracing of ciTypeFlow analysis") \ | |
2254 \ | |
2255 develop(intx, CICloneLoopTestLimit, 100, \ | |
2256 "size limit for blocks heuristically cloned in ciTypeFlow") \ | |
2257 \ | |
2258 /* temp diagnostics */ \ | |
2259 \ | |
2260 diagnostic(bool, TraceRedundantCompiles, false, \ | |
2261 "Have compile broker print when a request already in the queue is"\ | |
2262 " requested again") \ | |
2263 \ | |
2264 diagnostic(bool, InitialCompileFast, false, \ | |
2265 "Initial compile at CompLevel_fast_compile") \ | |
2266 \ | |
2267 diagnostic(bool, InitialCompileReallyFast, false, \ | |
2268 "Initial compile at CompLevel_really_fast_compile (no profile)") \ | |
2269 \ | |
2270 diagnostic(bool, FullProfileOnReInterpret, true, \ | |
2271 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ | |
2272 \ | |
2273 /* compiler */ \ | |
2274 \ | |
2275 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ | |
2276 "Number of compiler threads to run") \ | |
2277 \ | |
2278 product(intx, CompilationPolicyChoice, 0, \ | |
2279 "which compilation policy (0/1)") \ | |
2280 \ | |
2281 develop(bool, UseStackBanging, true, \ | |
2282 "use stack banging for stack overflow checks (required for " \ | |
2283 "proper StackOverflow handling; disable only to measure cost " \ | |
2284 "of stackbanging)") \ | |
2285 \ | |
2286 develop(bool, Use24BitFPMode, true, \ | |
2287 "Set 24-bit FPU mode on a per-compile basis ") \ | |
2288 \ | |
2289 develop(bool, Use24BitFP, true, \ | |
2290 "use FP instructions that produce 24-bit precise results") \ | |
2291 \ | |
2292 develop(bool, UseStrictFP, true, \ | |
2293 "use strict fp if modifier strictfp is set") \ | |
2294 \ | |
2295 develop(bool, GenerateSynchronizationCode, true, \ | |
2296 "generate locking/unlocking code for synchronized methods and " \ | |
2297 "monitors") \ | |
2298 \ | |
2299 develop(bool, GenerateCompilerNullChecks, true, \ | |
2300 "Generate explicit null checks for loads/stores/calls") \ | |
2301 \ | |
2302 develop(bool, GenerateRangeChecks, true, \ | |
2303 "Generate range checks for array accesses") \ | |
2304 \ | |
2305 develop_pd(bool, ImplicitNullChecks, \ | |
2306 "generate code for implicit null checks") \ | |
2307 \ | |
2308 product(bool, PrintSafepointStatistics, false, \ | |
2309 "print statistics about safepoint synchronization") \ | |
2310 \ | |
2311 product(intx, PrintSafepointStatisticsCount, 300, \ | |
2312 "total number of safepoint statistics collected " \ | |
2313 "before printing them out") \ | |
2314 \ | |
2315 product(intx, PrintSafepointStatisticsTimeout, -1, \ | |
2316 "print safepoint statistics only when safepoint takes" \ | |
2317 " more than PrintSafepointSatisticsTimeout in millis") \ | |
2318 \ | |
1321
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2319 product(bool, TraceSafepointCleanupTime, false, \ |
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2320 "print the break down of clean up tasks performed during" \ |
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2321 " safepoint") \ |
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2322 \ |
0 | 2323 develop(bool, InlineAccessors, true, \ |
2324 "inline accessor methods (get/set)") \ | |
2325 \ | |
2326 product(bool, Inline, true, \ | |
2327 "enable inlining") \ | |
2328 \ | |
2329 product(bool, ClipInlining, true, \ | |
2330 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ | |
2331 \ | |
2332 develop(bool, UseCHA, true, \ | |
2333 "enable CHA") \ | |
2334 \ | |
2335 product(bool, UseTypeProfile, true, \ | |
2336 "Check interpreter profile for historically monomorphic calls") \ | |
2337 \ | |
2338 product(intx, TypeProfileMajorReceiverPercent, 90, \ | |
2339 "% of major receiver type to all profiled receivers") \ | |
2340 \ | |
2341 notproduct(bool, TimeCompiler, false, \ | |
2342 "time the compiler") \ | |
2343 \ | |
2344 notproduct(bool, TimeCompiler2, false, \ | |
2345 "detailed time the compiler (requires +TimeCompiler)") \ | |
2346 \ | |
2347 diagnostic(bool, PrintInlining, false, \ | |
2348 "prints inlining optimizations") \ | |
2349 \ | |
2350 diagnostic(bool, PrintIntrinsics, false, \ | |
2351 "prints attempted and successful inlining of intrinsics") \ | |
2352 \ | |
775
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2353 product(bool, UseCountLeadingZerosInstruction, false, \ |
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2354 "Use count leading zeros instruction") \ |
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2355 \ |
643
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2356 product(bool, UsePopCountInstruction, false, \ |
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2357 "Use population count instruction") \ |
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|
2358 \ |
0 | 2359 diagnostic(ccstrlist, DisableIntrinsic, "", \ |
2360 "do not expand intrinsics whose (internal) names appear here") \ | |
2361 \ | |
2362 develop(bool, StressReflectiveCode, false, \ | |
2363 "Use inexact types at allocations, etc., to test reflection") \ | |
2364 \ | |
2365 develop(bool, EagerInitialization, false, \ | |
2366 "Eagerly initialize classes if possible") \ | |
2367 \ | |
2368 develop(bool, TraceMethodReplacement, false, \ | |
2369 "Print when methods are replaced do to recompilation") \ | |
2370 \ | |
2371 develop(bool, PrintMethodFlushing, false, \ | |
2372 "print the nmethods being flushed") \ | |
2373 \ | |
2374 notproduct(bool, LogMultipleMutexLocking, false, \ | |
2375 "log locking and unlocking of mutexes (only if multiple locks " \ | |
2376 "are held)") \ | |
2377 \ | |
2378 develop(bool, UseRelocIndex, false, \ | |
2379 "use an index to speed random access to relocations") \ | |
2380 \ | |
2381 develop(bool, StressCodeBuffers, false, \ | |
2382 "Exercise code buffer expansion and other rare state changes") \ | |
2383 \ | |
2384 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ | |
2385 "Generate extra debugging info for non-safepoints in nmethods") \ | |
2386 \ | |
2387 diagnostic(bool, DebugInlinedCalls, true, \ | |
2388 "If false, restricts profiled locations to the root method only") \ | |
2389 \ | |
2390 product(bool, PrintVMOptions, trueInDebug, \ | |
1150 | 2391 "Print flags that appeared on the command line") \ |
0 | 2392 \ |
564 | 2393 product(bool, IgnoreUnrecognizedVMOptions, false, \ |
2394 "Ignore unrecognized VM options") \ | |
2395 \ | |
1150 | 2396 product(bool, PrintCommandLineFlags, false, \ |
2397 "Print flags specified on command line or set by ergonomics") \ | |
2398 \ | |
2399 product(bool, PrintFlagsInitial, false, \ | |
2400 "Print all VM flags before argument processing and exit VM") \ | |
2401 \ | |
2402 product(bool, PrintFlagsFinal, false, \ | |
2403 "Print all VM flags after argument and ergonomic processing") \ | |
2404 \ | |
1768
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2405 notproduct(bool, PrintFlagsWithComments, false, \ |
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2406 "Print all VM flags with default values and descriptions and exit")\ |
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2407 \ |
0 | 2408 diagnostic(bool, SerializeVMOutput, true, \ |
2409 "Use a mutex to serialize output to tty and hotspot.log") \ | |
2410 \ | |
2411 diagnostic(bool, DisplayVMOutput, true, \ | |
2412 "Display all VM output on the tty, independently of LogVMOutput") \ | |
2413 \ | |
2414 diagnostic(bool, LogVMOutput, trueInDebug, \ | |
2415 "Save VM output to hotspot.log, or to LogFile") \ | |
2416 \ | |
2417 diagnostic(ccstr, LogFile, NULL, \ | |
2418 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ | |
2419 \ | |
2420 product(ccstr, ErrorFile, NULL, \ | |
2421 "If an error occurs, save the error data to this file " \ | |
2422 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ | |
2423 \ | |
2424 product(bool, DisplayVMOutputToStderr, false, \ | |
2425 "If DisplayVMOutput is true, display all VM output to stderr") \ | |
2426 \ | |
2427 product(bool, DisplayVMOutputToStdout, false, \ | |
2428 "If DisplayVMOutput is true, display all VM output to stdout") \ | |
2429 \ | |
2430 product(bool, UseHeavyMonitors, false, \ | |
2431 "use heavyweight instead of lightweight Java monitors") \ | |
2432 \ | |
2433 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ | |
2434 "print histogram of the symbol table") \ | |
2435 \ | |
2436 notproduct(bool, ExitVMOnVerifyError, false, \ | |
2437 "standard exit from VM if bytecode verify error " \ | |
2438 "(only in debug mode)") \ | |
2439 \ | |
2440 notproduct(ccstr, AbortVMOnException, NULL, \ | |
2441 "Call fatal if this exception is thrown. Example: " \ | |
2442 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ | |
2443 \ | |
1684
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2444 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ |
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2445 "Call fatal if the exception pointed by AbortVMOnException " \ |
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2446 "has this message.") \ |
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2447 \ |
0 | 2448 develop(bool, DebugVtables, false, \ |
2449 "add debugging code to vtable dispatch") \ | |
2450 \ | |
2451 develop(bool, PrintVtables, false, \ | |
2452 "print vtables when printing klass") \ | |
2453 \ | |
2454 notproduct(bool, PrintVtableStats, false, \ | |
2455 "print vtables stats at end of run") \ | |
2456 \ | |
2457 develop(bool, TraceCreateZombies, false, \ | |
2458 "trace creation of zombie nmethods") \ | |
2459 \ | |
2460 notproduct(bool, IgnoreLockingAssertions, false, \ | |
2461 "disable locking assertions (for speed)") \ | |
2462 \ | |
2463 notproduct(bool, VerifyLoopOptimizations, false, \ | |
2464 "verify major loop optimizations") \ | |
2465 \ | |
2466 product(bool, RangeCheckElimination, true, \ | |
2467 "Split loop iterations to eliminate range checks") \ | |
2468 \ | |
2469 develop_pd(bool, UncommonNullCast, \ | |
2470 "track occurrences of null in casts; adjust compiler tactics") \ | |
2471 \ | |
2472 develop(bool, TypeProfileCasts, true, \ | |
2473 "treat casts like calls for purposes of type profiling") \ | |
2474 \ | |
2475 develop(bool, MonomorphicArrayCheck, true, \ | |
2476 "Uncommon-trap array store checks that require full type check") \ | |
2477 \ | |
1746
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2478 diagnostic(bool, ProfileDynamicTypes, true, \ |
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2479 "do extra type profiling and use it more aggressively") \ |
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|
2480 \ |
0 | 2481 develop(bool, DelayCompilationDuringStartup, true, \ |
2482 "Delay invoking the compiler until main application class is " \ | |
2483 "loaded") \ | |
2484 \ | |
2485 develop(bool, CompileTheWorld, false, \ | |
2486 "Compile all methods in all classes in bootstrap class path " \ | |
2487 "(stress test)") \ | |
2488 \ | |
2489 develop(bool, CompileTheWorldPreloadClasses, true, \ | |
2490 "Preload all classes used by a class before start loading") \ | |
2491 \ | |
2492 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ | |
2493 "Compile all methods although class initializer failed") \ | |
2494 \ | |
1188
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2495 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ |
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6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
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|
2496 "Force a safepoint every n compiles so sweeper can keep up") \ |
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|
2497 \ |
0 | 2498 develop(bool, TraceIterativeGVN, false, \ |
2499 "Print progress during Iterative Global Value Numbering") \ | |
2500 \ | |
2501 develop(bool, FillDelaySlots, true, \ | |
2502 "Fill delay slots (on SPARC only)") \ | |
2503 \ | |
2504 develop(bool, VerifyIterativeGVN, false, \ | |
2505 "Verify Def-Use modifications during sparse Iterative Global " \ | |
2506 "Value Numbering") \ | |
2507 \ | |
2508 notproduct(bool, TracePhaseCCP, false, \ | |
2509 "Print progress during Conditional Constant Propagation") \ | |
2510 \ | |
2511 develop(bool, TimeLivenessAnalysis, false, \ | |
2512 "Time computation of bytecode liveness analysis") \ | |
2513 \ | |
2514 develop(bool, TraceLivenessGen, false, \ | |
2515 "Trace the generation of liveness analysis information") \ | |
2516 \ | |
2517 notproduct(bool, TraceLivenessQuery, false, \ | |
2518 "Trace queries of liveness analysis information") \ | |
2519 \ | |
2520 notproduct(bool, CollectIndexSetStatistics, false, \ | |
2521 "Collect information about IndexSets") \ | |
2522 \ | |
2523 develop(bool, PrintDominators, false, \ | |
2524 "Print out dominator trees for GVN") \ | |
2525 \ | |
2526 develop(bool, UseLoopSafepoints, true, \ | |
2527 "Generate Safepoint nodes in every loop") \ | |
2528 \ | |
2529 notproduct(bool, TraceCISCSpill, false, \ | |
2530 "Trace allocators use of cisc spillable instructions") \ | |
2531 \ | |
2532 notproduct(bool, TraceSpilling, false, \ | |
2533 "Trace spilling") \ | |
2534 \ | |
2535 product(bool, SplitIfBlocks, true, \ | |
2536 "Clone compares and control flow through merge points to fold " \ | |
2537 "some branches") \ | |
2538 \ | |
2539 develop(intx, FastAllocateSizeLimit, 128*K, \ | |
2540 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ | |
2541 "Inline allocations larger than this in doublewords must go slow")\ | |
2542 \ | |
2543 product(bool, AggressiveOpts, false, \ | |
2544 "Enable aggressive optimizations - see arguments.cpp") \ | |
2545 \ | |
192
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2546 product(bool, UseStringCache, false, \ |
6d13fcb3663f
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|
2547 "Enable String cache capabilities on String.java") \ |
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2548 \ |
0 | 2549 /* statistics */ \ |
2550 develop(bool, CountCompiledCalls, false, \ | |
2551 "counts method invocations") \ | |
2552 \ | |
2553 notproduct(bool, CountRuntimeCalls, false, \ | |
2554 "counts VM runtime calls") \ | |
2555 \ | |
2556 develop(bool, CountJNICalls, false, \ | |
2557 "counts jni method invocations") \ | |
2558 \ | |
2559 notproduct(bool, CountJVMCalls, false, \ | |
2560 "counts jvm method invocations") \ | |
2561 \ | |
2562 notproduct(bool, CountRemovableExceptions, false, \ | |
2563 "count exceptions that could be replaced by branches due to " \ | |
2564 "inlining") \ | |
2565 \ | |
2566 notproduct(bool, ICMissHistogram, false, \ | |
2567 "produce histogram of IC misses") \ | |
2568 \ | |
2569 notproduct(bool, PrintClassStatistics, false, \ | |
2570 "prints class statistics at end of run") \ | |
2571 \ | |
2572 notproduct(bool, PrintMethodStatistics, false, \ | |
2573 "prints method statistics at end of run") \ | |
2574 \ | |
2575 /* interpreter */ \ | |
2576 develop(bool, ClearInterpreterLocals, false, \ | |
2577 "Always clear local variables of interpreter activations upon " \ | |
2578 "entry") \ | |
2579 \ | |
2580 product_pd(bool, RewriteBytecodes, \ | |
2581 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ | |
2582 \ | |
2583 product_pd(bool, RewriteFrequentPairs, \ | |
2584 "Rewrite frequently used bytecode pairs into a single bytecode") \ | |
2585 \ | |
100
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2586 diagnostic(bool, PrintInterpreter, false, \ |
0 | 2587 "Prints the generated interpreter code") \ |
2588 \ | |
2589 product(bool, UseInterpreter, true, \ | |
2590 "Use interpreter for non-compiled methods") \ | |
2591 \ | |
2592 develop(bool, UseFastSignatureHandlers, true, \ | |
2593 "Use fast signature handlers for native calls") \ | |
2594 \ | |
2595 develop(bool, UseV8InstrsOnly, false, \ | |
2596 "Use SPARC-V8 Compliant instruction subset") \ | |
2597 \ | |
2598 product(bool, UseNiagaraInstrs, false, \ | |
2599 "Use Niagara-efficient instruction subset") \ | |
2600 \ | |
2601 develop(bool, UseCASForSwap, false, \ | |
2602 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ | |
2603 \ | |
2604 product(bool, UseLoopCounter, true, \ | |
2605 "Increment invocation counter on backward branch") \ | |
2606 \ | |
2607 product(bool, UseFastEmptyMethods, true, \ | |
2608 "Use fast method entry code for empty methods") \ | |
2609 \ | |
2610 product(bool, UseFastAccessorMethods, true, \ | |
2611 "Use fast method entry code for accessor methods") \ | |
2612 \ | |
2613 product_pd(bool, UseOnStackReplacement, \ | |
2614 "Use on stack replacement, calls runtime if invoc. counter " \ | |
2615 "overflows in loop") \ | |
2616 \ | |
2617 notproduct(bool, TraceOnStackReplacement, false, \ | |
2618 "Trace on stack replacement") \ | |
2619 \ | |
2620 develop(bool, PoisonOSREntry, true, \ | |
2621 "Detect abnormal calls to OSR code") \ | |
2622 \ | |
2623 product_pd(bool, PreferInterpreterNativeStubs, \ | |
2624 "Use always interpreter stubs for native methods invoked via " \ | |
2625 "interpreter") \ | |
2626 \ | |
2627 develop(bool, CountBytecodes, false, \ | |
2628 "Count number of bytecodes executed") \ | |
2629 \ | |
2630 develop(bool, PrintBytecodeHistogram, false, \ | |
2631 "Print histogram of the executed bytecodes") \ | |
2632 \ | |
2633 develop(bool, PrintBytecodePairHistogram, false, \ | |
2634 "Print histogram of the executed bytecode pairs") \ | |
2635 \ | |
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|
2636 diagnostic(bool, PrintSignatureHandlers, false, \ |
0 | 2637 "Print code generated for native method signature handlers") \ |
2638 \ | |
2639 develop(bool, VerifyOops, false, \ | |
2640 "Do plausibility checks for oops") \ | |
2641 \ | |
2642 develop(bool, CheckUnhandledOops, false, \ | |
2643 "Check for unhandled oops in VM code") \ | |
2644 \ | |
2645 develop(bool, VerifyJNIFields, trueInDebug, \ | |
2646 "Verify jfieldIDs for instance fields") \ | |
2647 \ | |
2648 notproduct(bool, VerifyJNIEnvThread, false, \ | |
2649 "Verify JNIEnv.thread == Thread::current() when entering VM " \ | |
2650 "from JNI") \ | |
2651 \ | |
2652 develop(bool, VerifyFPU, false, \ | |
2653 "Verify FPU state (check for NaN's, etc.)") \ | |
2654 \ | |
2655 develop(bool, VerifyThread, false, \ | |
2656 "Watch the thread register for corruption (SPARC only)") \ | |
2657 \ | |
2658 develop(bool, VerifyActivationFrameSize, false, \ | |
2659 "Verify that activation frame didn't become smaller than its " \ | |
2660 "minimal size") \ | |
2661 \ | |
2662 develop(bool, TraceFrequencyInlining, false, \ | |
2663 "Trace frequency based inlining") \ | |
2664 \ | |
2665 notproduct(bool, TraceTypeProfile, false, \ | |
2666 "Trace type profile") \ | |
2667 \ | |
2668 develop_pd(bool, InlineIntrinsics, \ | |
2669 "Inline intrinsics that can be statically resolved") \ | |
2670 \ | |
2671 product_pd(bool, ProfileInterpreter, \ | |
2672 "Profile at the bytecode level during interpretation") \ | |
2673 \ | |
2674 develop_pd(bool, ProfileTraps, \ | |
2675 "Profile deoptimization traps at the bytecode level") \ | |
2676 \ | |
2677 product(intx, ProfileMaturityPercentage, 20, \ | |
2678 "number of method invocations/branches (expressed as % of " \ | |
2679 "CompileThreshold) before using the method's profile") \ | |
2680 \ | |
2681 develop(bool, PrintMethodData, false, \ | |
2682 "Print the results of +ProfileInterpreter at end of run") \ | |
2683 \ | |
2684 develop(bool, VerifyDataPointer, trueInDebug, \ | |
2685 "Verify the method data pointer during interpreter profiling") \ | |
2686 \ | |
2687 develop(bool, VerifyCompiledCode, false, \ | |
2688 "Include miscellaneous runtime verifications in nmethod code; " \ | |
1064 | 2689 "default off because it disturbs nmethod size heuristics") \ |
0 | 2690 \ |
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changeset
|
2691 notproduct(bool, CrashGCForDumpingJavaThread, false, \ |
547f81740344
6361589: Print out stack trace for target thread of GC crash
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parents:
1064
diff
changeset
|
2692 "Manually make GC thread crash then dump java stack trace; " \ |
547f81740344
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minqi
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1064
diff
changeset
|
2693 "Test only") \ |
0 | 2694 \ |
2695 /* compilation */ \ | |
2696 product(bool, UseCompiler, true, \ | |
2697 "use compilation") \ | |
2698 \ | |
2699 develop(bool, TraceCompilationPolicy, false, \ | |
2700 "Trace compilation policy") \ | |
2701 \ | |
2702 develop(bool, TimeCompilationPolicy, false, \ | |
2703 "Time the compilation policy") \ | |
2704 \ | |
2705 product(bool, UseCounterDecay, true, \ | |
2706 "adjust recompilation counters") \ | |
2707 \ | |
2708 develop(intx, CounterHalfLifeTime, 30, \ | |
2709 "half-life time of invocation counters (in secs)") \ | |
2710 \ | |
2711 develop(intx, CounterDecayMinIntervalLength, 500, \ | |
2712 "Min. ms. between invocation of CounterDecay") \ | |
2713 \ | |
2714 product(bool, AlwaysCompileLoopMethods, false, \ | |
2715 "when using recompilation, never interpret methods " \ | |
2716 "containing loops") \ | |
2717 \ | |
2718 product(bool, DontCompileHugeMethods, true, \ | |
2719 "don't compile methods > HugeMethodLimit") \ | |
2720 \ | |
2721 /* Bytecode escape analysis estimation. */ \ | |
2722 product(bool, EstimateArgEscape, true, \ | |
2723 "Analyze bytecodes to estimate escape state of arguments") \ | |
2724 \ | |
2725 product(intx, BCEATraceLevel, 0, \ | |
2726 "How much tracing to do of bytecode escape analysis estimates") \ | |
2727 \ | |
2728 product(intx, MaxBCEAEstimateLevel, 5, \ | |
2729 "Maximum number of nested calls that are analyzed by BC EA.") \ | |
2730 \ | |
2731 product(intx, MaxBCEAEstimateSize, 150, \ | |
2732 "Maximum bytecode size of a method to be analyzed by BC EA.") \ | |
2733 \ | |
2734 product(intx, AllocatePrefetchStyle, 1, \ | |
2735 "0 = no prefetch, " \ | |
2736 "1 = prefetch instructions for each allocation, " \ | |
1367
9e321dcfa5b7
6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents:
1366
diff
changeset
|
2737 "2 = use TLAB watermark to gate allocation prefetch, " \ |
9e321dcfa5b7
6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents:
1366
diff
changeset
|
2738 "3 = use BIS instruction on Sparc for allocation prefetch") \ |
0 | 2739 \ |
2740 product(intx, AllocatePrefetchDistance, -1, \ | |
2741 "Distance to prefetch ahead of allocation pointer") \ | |
2742 \ | |
2743 product(intx, AllocatePrefetchLines, 1, \ | |
2744 "Number of lines to prefetch ahead of allocation pointer") \ | |
2745 \ | |
2746 product(intx, AllocatePrefetchStepSize, 16, \ | |
2747 "Step size in bytes of sequential prefetch instructions") \ | |
2748 \ | |
2749 product(intx, AllocatePrefetchInstr, 0, \ | |
2750 "Prefetch instruction to prefetch ahead of allocation pointer") \ | |
2751 \ | |
2752 product(intx, ReadPrefetchInstr, 0, \ | |
2753 "Prefetch instruction to prefetch ahead") \ | |
2754 \ | |
2755 /* deoptimization */ \ | |
2756 develop(bool, TraceDeoptimization, false, \ | |
2757 "Trace deoptimization") \ | |
2758 \ | |
2759 develop(bool, DebugDeoptimization, false, \ | |
2760 "Tracing various information while debugging deoptimization") \ | |
2761 \ | |
2762 product(intx, SelfDestructTimer, 0, \ | |
2763 "Will cause VM to terminate after a given time (in minutes) " \ | |
2764 "(0 means off)") \ | |
2765 \ | |
2766 product(intx, MaxJavaStackTraceDepth, 1024, \ | |
2767 "Max. no. of lines in the stack trace for Java exceptions " \ | |
2768 "(0 means all)") \ | |
2769 \ | |
2770 develop(intx, GuaranteedSafepointInterval, 1000, \ | |
2771 "Guarantee a safepoint (at least) every so many milliseconds " \ | |
2772 "(0 means none)") \ | |
2773 \ | |
2774 product(intx, SafepointTimeoutDelay, 10000, \ | |
2775 "Delay in milliseconds for option SafepointTimeout") \ | |
2776 \ | |
2777 product(intx, NmethodSweepFraction, 4, \ | |
2778 "Number of invocations of sweeper to cover all nmethods") \ | |
2779 \ | |
1538
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1513
diff
changeset
|
2780 product(intx, NmethodSweepCheckInterval, 5, \ |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1513
diff
changeset
|
2781 "Compilers wake up every n seconds to possibly sweep nmethods") \ |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1513
diff
changeset
|
2782 \ |
0 | 2783 notproduct(intx, MemProfilingInterval, 500, \ |
2784 "Time between each invocation of the MemProfiler") \ | |
2785 \ | |
2786 develop(intx, MallocCatchPtr, -1, \ | |
2787 "Hit breakpoint when mallocing/freeing this pointer") \ | |
2788 \ | |
2789 notproduct(intx, AssertRepeat, 1, \ | |
2790 "number of times to evaluate expression in assert " \ | |
2791 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ | |
2792 \ | |
2793 notproduct(ccstrlist, SuppressErrorAt, "", \ | |
2794 "List of assertions (file:line) to muzzle") \ | |
2795 \ | |
2796 notproduct(uintx, HandleAllocationLimit, 1024, \ | |
2797 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ | |
2798 "is used") \ | |
2799 \ | |
2800 develop(uintx, TotalHandleAllocationLimit, 1024, \ | |
2801 "Threshold for total handle allocation when " \ | |
2802 "+TraceHandleAllocation is used") \ | |
2803 \ | |
2804 develop(intx, StackPrintLimit, 100, \ | |
2805 "number of stack frames to print in VM-level stack dump") \ | |
2806 \ | |
2807 notproduct(intx, MaxElementPrintSize, 256, \ | |
2808 "maximum number of elements to print") \ | |
2809 \ | |
2810 notproduct(intx, MaxSubklassPrintSize, 4, \ | |
2811 "maximum number of subklasses to print when printing klass") \ | |
2812 \ | |
1157
c3b315a0d58a
6912063: inlining parameters need to be adjusted for some uses of the JVM
jrose
parents:
1150
diff
changeset
|
2813 product(intx, MaxInlineLevel, 9, \ |
0 | 2814 "maximum number of nested calls that are inlined") \ |
2815 \ | |
1157
c3b315a0d58a
6912063: inlining parameters need to be adjusted for some uses of the JVM
jrose
parents:
1150
diff
changeset
|
2816 product(intx, MaxRecursiveInlineLevel, 1, \ |
0 | 2817 "maximum number of nested recursive calls that are inlined") \ |
2818 \ | |
675 | 2819 product_pd(intx, InlineSmallCode, \ |
0 | 2820 "Only inline already compiled methods if their code size is " \ |
2821 "less than this") \ | |
2822 \ | |
2823 product(intx, MaxInlineSize, 35, \ | |
2824 "maximum bytecode size of a method to be inlined") \ | |
2825 \ | |
2826 product_pd(intx, FreqInlineSize, \ | |
2827 "maximum bytecode size of a frequent method to be inlined") \ | |
2828 \ | |
1157
c3b315a0d58a
6912063: inlining parameters need to be adjusted for some uses of the JVM
jrose
parents:
1150
diff
changeset
|
2829 product(intx, MaxTrivialSize, 6, \ |
0 | 2830 "maximum bytecode size of a trivial method to be inlined") \ |
2831 \ | |
1157
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jrose
parents:
1150
diff
changeset
|
2832 product(intx, MinInliningThreshold, 250, \ |
0 | 2833 "min. invocation count a method needs to have to be inlined") \ |
2834 \ | |
2835 develop(intx, AlignEntryCode, 4, \ | |
2836 "aligns entry code to specified value (in bytes)") \ | |
2837 \ | |
2838 develop(intx, MethodHistogramCutoff, 100, \ | |
2839 "cutoff value for method invoc. histogram (+CountCalls)") \ | |
2840 \ | |
2841 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ | |
2842 "# of interpreted methods to show in profile") \ | |
2843 \ | |
2844 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ | |
2845 "# of compiled methods to show in profile") \ | |
2846 \ | |
2847 develop(intx, ProfilerNumberOfStubMethods, 25, \ | |
2848 "# of stub methods to show in profile") \ | |
2849 \ | |
2850 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ | |
2851 "# of runtime stub nodes to show in profile") \ | |
2852 \ | |
2853 product(intx, ProfileIntervalsTicks, 100, \ | |
2854 "# of ticks between printing of interval profile " \ | |
2855 "(+ProfileIntervals)") \ | |
2856 \ | |
2857 notproduct(intx, ScavengeALotInterval, 1, \ | |
2858 "Interval between which scavenge will occur with +ScavengeALot") \ | |
2859 \ | |
2860 notproduct(intx, FullGCALotInterval, 1, \ | |
2861 "Interval between which full gc will occur with +FullGCALot") \ | |
2862 \ | |
2863 notproduct(intx, FullGCALotStart, 0, \ | |
2864 "For which invocation to start FullGCAlot") \ | |
2865 \ | |
2866 notproduct(intx, FullGCALotDummies, 32*K, \ | |
2867 "Dummy object allocated with +FullGCALot, forcing all objects " \ | |
2868 "to move") \ | |
2869 \ | |
2870 develop(intx, DontYieldALotInterval, 10, \ | |
2871 "Interval between which yields will be dropped (milliseconds)") \ | |
2872 \ | |
2873 develop(intx, MinSleepInterval, 1, \ | |
2874 "Minimum sleep() interval (milliseconds) when " \ | |
2875 "ConvertSleepToYield is off (used for SOLARIS)") \ | |
2876 \ | |
2877 product(intx, EventLogLength, 2000, \ | |
2878 "maximum nof events in event log") \ | |
2879 \ | |
2880 develop(intx, ProfilerPCTickThreshold, 15, \ | |
2881 "Number of ticks in a PC buckets to be a hotspot") \ | |
2882 \ | |
2883 notproduct(intx, DeoptimizeALotInterval, 5, \ | |
2884 "Number of exits until DeoptimizeALot kicks in") \ | |
2885 \ | |
2886 notproduct(intx, ZombieALotInterval, 5, \ | |
2887 "Number of exits until ZombieALot kicks in") \ | |
2888 \ | |
2889 develop(bool, StressNonEntrant, false, \ | |
2890 "Mark nmethods non-entrant at registration") \ | |
2891 \ | |
2892 diagnostic(intx, MallocVerifyInterval, 0, \ | |
2893 "if non-zero, verify C heap after every N calls to " \ | |
2894 "malloc/realloc/free") \ | |
2895 \ | |
2896 diagnostic(intx, MallocVerifyStart, 0, \ | |
2897 "if non-zero, start verifying C heap after Nth call to " \ | |
2898 "malloc/realloc/free") \ | |
2899 \ | |
1783 | 2900 product(intx, TypeProfileWidth, 2, \ |
0 | 2901 "number of receiver types to record in call/cast profile") \ |
2902 \ | |
2903 develop(intx, BciProfileWidth, 2, \ | |
2904 "number of return bci's to record in ret profile") \ | |
2905 \ | |
2906 product(intx, PerMethodRecompilationCutoff, 400, \ | |
2907 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ | |
2908 \ | |
1206
87684f1a88b5
6614597: Performance variability in jvm2008 xml.validation
kvn
parents:
1202
diff
changeset
|
2909 product(intx, PerBytecodeRecompilationCutoff, 200, \ |
0 | 2910 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ |
2911 \ | |
2912 product(intx, PerMethodTrapLimit, 100, \ | |
2913 "Limit on traps (of one kind) in a method (includes inlines)") \ | |
2914 \ | |
2915 product(intx, PerBytecodeTrapLimit, 4, \ | |
2916 "Limit on traps (of one kind) at a particular BCI") \ | |
2917 \ | |
2918 develop(intx, FreqCountInvocations, 1, \ | |
2919 "Scaling factor for branch frequencies (deprecated)") \ | |
2920 \ | |
2921 develop(intx, InlineFrequencyRatio, 20, \ | |
2922 "Ratio of call site execution to caller method invocation") \ | |
2923 \ | |
2924 develop_pd(intx, InlineFrequencyCount, \ | |
2925 "Count of call site execution necessary to trigger frequent " \ | |
2926 "inlining") \ | |
2927 \ | |
2928 develop(intx, InlineThrowCount, 50, \ | |
2929 "Force inlining of interpreted methods that throw this often") \ | |
2930 \ | |
2931 develop(intx, InlineThrowMaxSize, 200, \ | |
2932 "Force inlining of throwing methods smaller than this") \ | |
2933 \ | |
2934 product(intx, AliasLevel, 3, \ | |
2935 "0 for no aliasing, 1 for oop/field/static/array split, " \ | |
2936 "2 for class split, 3 for unique instances") \ | |
2937 \ | |
2938 develop(bool, VerifyAliases, false, \ | |
2939 "perform extra checks on the results of alias analysis") \ | |
2940 \ | |
2941 develop(intx, ProfilerNodeSize, 1024, \ | |
2942 "Size in K to allocate for the Profile Nodes of each thread") \ | |
2943 \ | |
2944 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ | |
2945 "Number of times to spin wait on a v8 atomic operation lock") \ | |
2946 \ | |
2947 product(intx, ReadSpinIterations, 100, \ | |
2948 "Number of read attempts before a yield (spin inner loop)") \ | |
2949 \ | |
2950 product_pd(intx, PreInflateSpin, \ | |
2951 "Number of times to spin wait before inflation") \ | |
2952 \ | |
2953 product(intx, PreBlockSpin, 10, \ | |
2954 "Number of times to spin in an inflated lock before going to " \ | |
2955 "an OS lock") \ | |
2956 \ | |
2957 /* gc parameters */ \ | |
1064 | 2958 product(uintx, InitialHeapSize, 0, \ |
2959 "Initial heap size (in bytes); zero means OldSize + NewSize") \ | |
2960 \ | |
2961 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ | |
2962 "Maximum heap size (in bytes)") \ | |
2963 \ | |
2964 product(uintx, OldSize, ScaleForWordSize(4*M), \ | |
2965 "Initial tenured generation size (in bytes)") \ | |
2966 \ | |
1287
8911d8c0596f
6923123: Hotspot refuses to start when -Xmx4m or -Xms4m is specified
phh
parents:
1211
diff
changeset
|
2967 product(uintx, NewSize, ScaleForWordSize(1*M), \ |
1064 | 2968 "Initial new generation size (in bytes)") \ |
0 | 2969 \ |
2970 product(uintx, MaxNewSize, max_uintx, \ | |
1064 | 2971 "Maximum new generation size (in bytes), max_uintx means set " \ |
2972 "ergonomically") \ | |
0 | 2973 \ |
2974 product(uintx, PretenureSizeThreshold, 0, \ | |
1064 | 2975 "Maximum size in bytes of objects allocated in DefNew " \ |
2976 "generation; zero means no maximum") \ | |
2977 \ | |
2978 product(uintx, TLABSize, 0, \ | |
2979 "Starting TLAB size (in bytes); zero means set ergonomically") \ | |
0 | 2980 \ |
2981 product(uintx, MinTLABSize, 2*K, \ | |
2982 "Minimum allowed TLAB size (in bytes)") \ | |
2983 \ | |
2984 product(uintx, TLABAllocationWeight, 35, \ | |
2985 "Allocation averaging weight") \ | |
2986 \ | |
2987 product(uintx, TLABWasteTargetPercent, 1, \ | |
2988 "Percentage of Eden that can be wasted") \ | |
2989 \ | |
2990 product(uintx, TLABRefillWasteFraction, 64, \ | |
2991 "Max TLAB waste at a refill (internal fragmentation)") \ | |
2992 \ | |
2993 product(uintx, TLABWasteIncrement, 4, \ | |
2994 "Increment allowed waste at slow allocation") \ | |
2995 \ | |
1064 | 2996 product(intx, SurvivorRatio, 8, \ |
0 | 2997 "Ratio of eden/survivor space size") \ |
2998 \ | |
1064 | 2999 product(intx, NewRatio, 2, \ |
0 | 3000 "Ratio of new/old generation sizes") \ |
3001 \ | |
3002 product_pd(uintx, NewSizeThreadIncrease, \ | |
3003 "Additional size added to desired new generation size per " \ | |
3004 "non-daemon thread (in bytes)") \ | |
3005 \ | |
3006 product_pd(uintx, PermSize, \ | |
1064 | 3007 "Initial size of permanent generation (in bytes)") \ |
0 | 3008 \ |
3009 product_pd(uintx, MaxPermSize, \ | |
3010 "Maximum size of permanent generation (in bytes)") \ | |
3011 \ | |
3012 product(uintx, MinHeapFreeRatio, 40, \ | |
3013 "Min percentage of heap free after GC to avoid expansion") \ | |
3014 \ | |
3015 product(uintx, MaxHeapFreeRatio, 70, \ | |
3016 "Max percentage of heap free after GC to avoid shrinking") \ | |
3017 \ | |
3018 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ | |
3019 "Number of milliseconds per MB of free space in the heap") \ | |
3020 \ | |
3021 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ | |
3022 "Min change in heap space due to GC (in bytes)") \ | |
3023 \ | |
3024 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ | |
3025 "Min expansion of permanent heap (in bytes)") \ | |
3026 \ | |
3027 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ | |
3028 "Max expansion of permanent heap without full GC (in bytes)") \ | |
3029 \ | |
3030 product(intx, QueuedAllocationWarningCount, 0, \ | |
3031 "Number of times an allocation that queues behind a GC " \ | |
3032 "will retry before printing a warning") \ | |
3033 \ | |
3034 diagnostic(uintx, VerifyGCStartAt, 0, \ | |
3035 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ | |
3036 \ | |
3037 diagnostic(intx, VerifyGCLevel, 0, \ | |
3038 "Generation level at which to start +VerifyBefore/AfterGC") \ | |
3039 \ | |
3040 develop(uintx, ExitAfterGCNum, 0, \ | |
3041 "If non-zero, exit after this GC.") \ | |
3042 \ | |
3043 product(intx, MaxTenuringThreshold, 15, \ | |
3044 "Maximum value for tenuring threshold") \ | |
3045 \ | |
3046 product(intx, InitialTenuringThreshold, 7, \ | |
3047 "Initial value for tenuring threshold") \ | |
3048 \ | |
3049 product(intx, TargetSurvivorRatio, 50, \ | |
3050 "Desired percentage of survivor space used after scavenge") \ | |
3051 \ | |
438 | 3052 product(uintx, MarkSweepDeadRatio, 5, \ |
0 | 3053 "Percentage (0-100) of the old gen allowed as dead wood." \ |
3054 "Serial mark sweep treats this as both the min and max value." \ | |
3055 "CMS uses this value only if it falls back to mark sweep." \ | |
3056 "Par compact uses a variable scale based on the density of the" \ | |
3057 "generation and treats this as the max value when the heap is" \ | |
3058 "either completely full or completely empty. Par compact also" \ | |
3059 "has a smaller default value; see arguments.cpp.") \ | |
3060 \ | |
438 | 3061 product(uintx, PermMarkSweepDeadRatio, 20, \ |
0 | 3062 "Percentage (0-100) of the perm gen allowed as dead wood." \ |
3063 "See MarkSweepDeadRatio for collector-specific comments.") \ | |
3064 \ | |
3065 product(intx, MarkSweepAlwaysCompactCount, 4, \ | |
3066 "How often should we fully compact the heap (ignoring the dead " \ | |
3067 "space parameters)") \ | |
3068 \ | |
3069 product(intx, PrintCMSStatistics, 0, \ | |
3070 "Statistics for CMS") \ | |
3071 \ | |
3072 product(bool, PrintCMSInitiationStatistics, false, \ | |
3073 "Statistics for initiating a CMS collection") \ | |
3074 \ | |
3075 product(intx, PrintFLSStatistics, 0, \ | |
3076 "Statistics for CMS' FreeListSpace") \ | |
3077 \ | |
3078 product(intx, PrintFLSCensus, 0, \ | |
3079 "Census for CMS' FreeListSpace") \ | |
3080 \ | |
3081 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ | |
3082 "Delay in ms between expansion and allocation") \ | |
3083 \ | |
3084 product(intx, DeferThrSuspendLoopCount, 4000, \ | |
3085 "(Unstable) Number of times to iterate in safepoint loop " \ | |
3086 " before blocking VM threads ") \ | |
3087 \ | |
3088 product(intx, DeferPollingPageLoopCount, -1, \ | |
3089 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ | |
3090 "before changing safepoint polling page to RO ") \ | |
3091 \ | |
3092 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ | |
3093 \ | |
3094 product(bool, PSChunkLargeArrays, true, \ | |
3095 "true: process large arrays in chunks") \ | |
3096 \ | |
3097 product(uintx, GCDrainStackTargetSize, 64, \ | |
3098 "how many entries we'll try to leave on the stack during " \ | |
3099 "parallel GC") \ | |
3100 \ | |
3101 /* stack parameters */ \ | |
3102 product_pd(intx, StackYellowPages, \ | |
3103 "Number of yellow zone (recoverable overflows) pages") \ | |
3104 \ | |
3105 product_pd(intx, StackRedPages, \ | |
3106 "Number of red zone (unrecoverable overflows) pages") \ | |
3107 \ | |
3108 product_pd(intx, StackShadowPages, \ | |
3109 "Number of shadow zone (for overflow checking) pages" \ | |
3110 " this should exceed the depth of the VM and native call stack") \ | |
3111 \ | |
3112 product_pd(intx, ThreadStackSize, \ | |
3113 "Thread Stack Size (in Kbytes)") \ | |
3114 \ | |
3115 product_pd(intx, VMThreadStackSize, \ | |
3116 "Non-Java Thread Stack Size (in Kbytes)") \ | |
3117 \ | |
3118 product_pd(intx, CompilerThreadStackSize, \ | |
3119 "Compiler Thread Stack Size (in Kbytes)") \ | |
3120 \ | |
3121 develop_pd(uintx, JVMInvokeMethodSlack, \ | |
3122 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ | |
3123 \ | |
3124 product(uintx, ThreadSafetyMargin, 50*M, \ | |
3125 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ | |
3126 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ | |
3127 "disable this feature") \ | |
3128 \ | |
3129 /* code cache parameters */ \ | |
3130 develop(uintx, CodeCacheSegmentSize, 64, \ | |
3131 "Code cache segment size (in bytes) - smallest unit of " \ | |
3132 "allocation") \ | |
3133 \ | |
3134 develop_pd(intx, CodeEntryAlignment, \ | |
3135 "Code entry alignment for generated code (in bytes)") \ | |
3136 \ | |
1365 | 3137 product_pd(intx, OptoLoopAlignment, \ |
3138 "Align inner loops to zero relative to this modulus") \ | |
3139 \ | |
0 | 3140 product_pd(uintx, InitialCodeCacheSize, \ |
3141 "Initial code cache size (in bytes)") \ | |
3142 \ | |
3143 product_pd(uintx, ReservedCodeCacheSize, \ | |
3144 "Reserved code cache size (in bytes) - maximum code cache size") \ | |
3145 \ | |
3146 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ | |
3147 "When less than X space left, we stop compiling.") \ | |
3148 \ | |
3149 product_pd(uintx, CodeCacheExpansionSize, \ | |
3150 "Code cache expansion size (in bytes)") \ | |
3151 \ | |
3152 develop_pd(uintx, CodeCacheMinBlockLength, \ | |
3153 "Minimum number of segments in a code cache block.") \ | |
3154 \ | |
3155 notproduct(bool, ExitOnFullCodeCache, false, \ | |
3156 "Exit the VM if we fill the code cache.") \ | |
3157 \ | |
1202 | 3158 product(bool, UseCodeCacheFlushing, false, \ |
3159 "Attempt to clean the code cache before shutting off compiler") \ | |
3160 \ | |
3161 product(intx, MinCodeCacheFlushingInterval, 30, \ | |
3162 "Min number of seconds between code cache cleaning sessions") \ | |
3163 \ | |
3164 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ | |
3165 "When less than X space left, start code cache cleaning") \ | |
3166 \ | |
0 | 3167 /* interpreter debugging */ \ |
3168 develop(intx, BinarySwitchThreshold, 5, \ | |
3169 "Minimal number of lookupswitch entries for rewriting to binary " \ | |
3170 "switch") \ | |
3171 \ | |
3172 develop(intx, StopInterpreterAt, 0, \ | |
3173 "Stops interpreter execution at specified bytecode number") \ | |
3174 \ | |
3175 develop(intx, TraceBytecodesAt, 0, \ | |
3176 "Traces bytecodes starting with specified bytecode number") \ | |
3177 \ | |
3178 /* compiler interface */ \ | |
3179 develop(intx, CIStart, 0, \ | |
3180 "the id of the first compilation to permit") \ | |
3181 \ | |
3182 develop(intx, CIStop, -1, \ | |
3183 "the id of the last compilation to permit") \ | |
3184 \ | |
3185 develop(intx, CIStartOSR, 0, \ | |
3186 "the id of the first osr compilation to permit " \ | |
3187 "(CICountOSR must be on)") \ | |
3188 \ | |
3189 develop(intx, CIStopOSR, -1, \ | |
3190 "the id of the last osr compilation to permit " \ | |
3191 "(CICountOSR must be on)") \ | |
3192 \ | |
3193 develop(intx, CIBreakAtOSR, -1, \ | |
3194 "id of osr compilation to break at") \ | |
3195 \ | |
3196 develop(intx, CIBreakAt, -1, \ | |
3197 "id of compilation to break at") \ | |
3198 \ | |
3199 product(ccstrlist, CompileOnly, "", \ | |
3200 "List of methods (pkg/class.name) to restrict compilation to") \ | |
3201 \ | |
3202 product(ccstr, CompileCommandFile, NULL, \ | |
3203 "Read compiler commands from this file [.hotspot_compiler]") \ | |
3204 \ | |
3205 product(ccstrlist, CompileCommand, "", \ | |
3206 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ | |
3207 \ | |
3208 product(bool, CICompilerCountPerCPU, false, \ | |
3209 "1 compiler thread for log(N CPUs)") \ | |
3210 \ | |
3211 develop(intx, CIFireOOMAt, -1, \ | |
3212 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ | |
3213 "(non-negative value throws OOM after this many CI accesses " \ | |
3214 "in each compile)") \ | |
3215 \ | |
3216 develop(intx, CIFireOOMAtDelay, -1, \ | |
3217 "Wait for this many CI accesses to occur in all compiles before " \ | |
3218 "beginning to throw OutOfMemoryErrors in each compile") \ | |
3219 \ | |
909
b32a809aab08
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
905
diff
changeset
|
3220 notproduct(bool, CIObjectFactoryVerify, false, \ |
b32a809aab08
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
905
diff
changeset
|
3221 "enable potentially expensive verification in ciObjectFactory") \ |
b32a809aab08
6866585: debug code in ciObjectFactory too slow for large objects
jcoomes
parents:
905
diff
changeset
|
3222 \ |
0 | 3223 /* Priorities */ \ |
3224 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ | |
3225 \ | |
3226 product(intx, ThreadPriorityPolicy, 0, \ | |
3227 "0 : Normal. "\ | |
3228 " VM chooses priorities that are appropriate for normal "\ | |
3229 " applications. On Solaris NORM_PRIORITY and above are mapped "\ | |
3230 " to normal native priority. Java priorities below NORM_PRIORITY"\ | |
3231 " map to lower native priority values. On Windows applications"\ | |
3232 " are allowed to use higher native priorities. However, with "\ | |
3233 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ | |
3234 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ | |
3235 " interfere with system threads. On Linux thread priorities "\ | |
3236 " are ignored because the OS does not support static priority "\ | |
3237 " in SCHED_OTHER scheduling class which is the only choice for"\ | |
3238 " non-root, non-realtime applications. "\ | |
3239 "1 : Aggressive. "\ | |
3240 " Java thread priorities map over to the entire range of "\ | |
3241 " native thread priorities. Higher Java thread priorities map "\ | |
3242 " to higher native thread priorities. This policy should be "\ | |
3243 " used with care, as sometimes it can cause performance "\ | |
3244 " degradation in the application and/or the entire system. On "\ | |
3245 " Linux this policy requires root privilege.") \ | |
3246 \ | |
3247 product(bool, ThreadPriorityVerbose, false, \ | |
3248 "print priority changes") \ | |
3249 \ | |
3250 product(intx, DefaultThreadPriority, -1, \ | |
3251 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ | |
3252 \ | |
3253 product(intx, CompilerThreadPriority, -1, \ | |
3254 "what priority should compiler threads run at (-1 means no change)") \ | |
3255 \ | |
3256 product(intx, VMThreadPriority, -1, \ | |
3257 "what priority should VM threads run at (-1 means no change)") \ | |
3258 \ | |
3259 product(bool, CompilerThreadHintNoPreempt, true, \ | |
3260 "(Solaris only) Give compiler threads an extra quanta") \ | |
3261 \ | |
3262 product(bool, VMThreadHintNoPreempt, false, \ | |
3263 "(Solaris only) Give VM thread an extra quanta") \ | |
3264 \ | |
3265 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3266 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3267 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3268 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3269 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3270 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3271 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3272 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3273 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3274 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ | |
3275 \ | |
3276 /* compiler debugging */ \ | |
3277 notproduct(intx, CompileTheWorldStartAt, 1, \ | |
3278 "First class to consider when using +CompileTheWorld") \ | |
3279 \ | |
3280 notproduct(intx, CompileTheWorldStopAt, max_jint, \ | |
3281 "Last class to consider when using +CompileTheWorld") \ | |
3282 \ | |
3283 develop(intx, NewCodeParameter, 0, \ | |
3284 "Testing Only: Create a dedicated integer parameter before " \ | |
3285 "putback") \ | |
3286 \ | |
3287 /* new oopmap storage allocation */ \ | |
3288 develop(intx, MinOopMapAllocation, 8, \ | |
3289 "Minimum number of OopMap entries in an OopMapSet") \ | |
3290 \ | |
3291 /* Background Compilation */ \ | |
3292 develop(intx, LongCompileThreshold, 50, \ | |
3293 "Used with +TraceLongCompiles") \ | |
3294 \ | |
3295 product(intx, StarvationMonitorInterval, 200, \ | |
3296 "Pause between each check in ms") \ | |
3297 \ | |
3298 /* recompilation */ \ | |
3299 product_pd(intx, CompileThreshold, \ | |
3300 "number of interpreted method invocations before (re-)compiling") \ | |
3301 \ | |
3302 product_pd(intx, BackEdgeThreshold, \ | |
3303 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ | |
3304 \ | |
1783 | 3305 product(intx, Tier0InvokeNotifyFreqLog, 7, \ |
3306 "Interpreter (tier 0) invocation notification frequency.") \ | |
3307 \ | |
3308 product(intx, Tier2InvokeNotifyFreqLog, 11, \ | |
3309 "C1 without MDO (tier 2) invocation notification frequency.") \ | |
3310 \ | |
3311 product(intx, Tier3InvokeNotifyFreqLog, 10, \ | |
3312 "C1 with MDO profiling (tier 3) invocation notification " \ | |
3313 "frequency.") \ | |
3314 \ | |
3315 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ | |
3316 "Interpreter (tier 0) invocation notification frequency.") \ | |
3317 \ | |
3318 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ | |
3319 "C1 without MDO (tier 2) invocation notification frequency.") \ | |
3320 \ | |
3321 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ | |
3322 "C1 with MDO profiling (tier 3) invocation notification " \ | |
3323 "frequency.") \ | |
3324 \ | |
3325 product(intx, Tier2CompileThreshold, 0, \ | |
3326 "threshold at which tier 2 compilation is invoked") \ | |
3327 \ | |
3328 product(intx, Tier2BackEdgeThreshold, 0, \ | |
3329 "Back edge threshold at which tier 2 compilation is invoked") \ | |
3330 \ | |
3331 product(intx, Tier3InvocationThreshold, 200, \ | |
3332 "Compile if number of method invocations crosses this " \ | |
3333 "threshold") \ | |
3334 \ | |
3335 product(intx, Tier3MinInvocationThreshold, 100, \ | |
3336 "Minimum invocation to compile at tier 3") \ | |
3337 \ | |
3338 product(intx, Tier3CompileThreshold, 2000, \ | |
3339 "Threshold at which tier 3 compilation is invoked (invocation " \ | |
3340 "minimum must be satisfied.") \ | |
3341 \ | |
3342 product(intx, Tier3BackEdgeThreshold, 7000, \ | |
3343 "Back edge threshold at which tier 3 OSR compilation is invoked") \ | |
3344 \ | |
3345 product(intx, Tier4InvocationThreshold, 5000, \ | |
3346 "Compile if number of method invocations crosses this " \ | |
3347 "threshold") \ | |
3348 \ | |
3349 product(intx, Tier4MinInvocationThreshold, 600, \ | |
3350 "Minimum invocation to compile at tier 4") \ | |
3351 \ | |
3352 product(intx, Tier4CompileThreshold, 15000, \ | |
3353 "Threshold at which tier 4 compilation is invoked (invocation " \ | |
3354 "minimum must be satisfied.") \ | |
3355 \ | |
3356 product(intx, Tier4BackEdgeThreshold, 40000, \ | |
3357 "Back edge threshold at which tier 4 OSR compilation is invoked") \ | |
3358 \ | |
3359 product(intx, Tier3DelayOn, 5, \ | |
3360 "If C2 queue size grows over this amount per compiler thread " \ | |
3361 "stop compiling at tier 3 and start compiling at tier 2") \ | |
3362 \ | |
3363 product(intx, Tier3DelayOff, 2, \ | |
3364 "If C2 queue size is less than this amount per compiler thread " \ | |
3365 "allow methods compiled at tier 2 transition to tier 3") \ | |
3366 \ | |
3367 product(intx, Tier3LoadFeedback, 5, \ | |
3368 "Tier 3 thresholds will increase twofold when C1 queue size " \ | |
3369 "reaches this amount per compiler thread") \ | |
3370 \ | |
3371 product(intx, Tier4LoadFeedback, 3, \ | |
3372 "Tier 4 thresholds will increase twofold when C2 queue size " \ | |
3373 "reaches this amount per compiler thread") \ | |
3374 \ | |
3375 product(intx, TieredCompileTaskTimeout, 50, \ | |
3376 "Kill compile task if method was not used within " \ | |
3377 "given timeout in milliseconds") \ | |
3378 \ | |
3379 product(intx, TieredStopAtLevel, 4, \ | |
3380 "Stop at given compilation level") \ | |
3381 \ | |
3382 product(intx, Tier0ProfilingStartPercentage, 200, \ | |
3383 "Start profiling in interpreter if the counters exceed tier 3" \ | |
3384 "thresholds by the specified percentage") \ | |
3385 \ | |
3386 product(intx, TieredRateUpdateMinTime, 1, \ | |
3387 "Minimum rate sampling interval (in milliseconds)") \ | |
3388 \ | |
3389 product(intx, TieredRateUpdateMaxTime, 25, \ | |
3390 "Maximum rate sampling interval (in milliseconds)") \ | |
0 | 3391 \ |
3392 product_pd(bool, TieredCompilation, \ | |
1783 | 3393 "Enable tiered compilation") \ |
3394 \ | |
3395 product(bool, PrintTieredEvents, false, \ | |
3396 "Print tiered events notifications") \ | |
0 | 3397 \ |
3398 product(bool, StressTieredRuntime, false, \ | |
3399 "Alternate client and server compiler on compile requests") \ | |
3400 \ | |
3401 product_pd(intx, OnStackReplacePercentage, \ | |
3402 "NON_TIERED number of method invocations/branches (expressed as %"\ | |
3403 "of CompileThreshold) before (re-)compiling OSR code") \ | |
3404 \ | |
3405 product(intx, InterpreterProfilePercentage, 33, \ | |
3406 "NON_TIERED number of method invocations/branches (expressed as %"\ | |
3407 "of CompileThreshold) before profiling in the interpreter") \ | |
3408 \ | |
3409 develop(intx, MaxRecompilationSearchLength, 10, \ | |
3410 "max. # frames to inspect searching for recompilee") \ | |
3411 \ | |
3412 develop(intx, MaxInterpretedSearchLength, 3, \ | |
3413 "max. # interp. frames to skip when searching for recompilee") \ | |
3414 \ | |
3415 develop(intx, DesiredMethodLimit, 8000, \ | |
3416 "desired max. method size (in bytecodes) after inlining") \ | |
3417 \ | |
3418 develop(intx, HugeMethodLimit, 8000, \ | |
3419 "don't compile methods larger than this if " \ | |
3420 "+DontCompileHugeMethods") \ | |
3421 \ | |
3422 /* New JDK 1.4 reflection implementation */ \ | |
3423 \ | |
3424 develop(bool, UseNewReflection, true, \ | |
3425 "Temporary flag for transition to reflection based on dynamic " \ | |
3426 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ | |
3427 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ | |
3428 "changes were needed") \ | |
3429 \ | |
3430 develop(bool, VerifyReflectionBytecodes, false, \ | |
3431 "Force verification of 1.4 reflection bytecodes. Does not work " \ | |
3432 "in situations like that described in 4486457 or for " \ | |
3433 "constructors generated for serialization, so can not be enabled "\ | |
3434 "in product.") \ | |
3435 \ | |
3436 product(bool, ReflectionWrapResolutionErrors, true, \ | |
3437 "Temporary flag for transition to AbstractMethodError wrapped " \ | |
3438 "in InvocationTargetException. See 6531596") \ | |
3439 \ | |
3440 \ | |
3441 develop(intx, FastSuperclassLimit, 8, \ | |
3442 "Depth of hardwired instanceof accelerator array") \ | |
3443 \ | |
3444 /* Properties for Java libraries */ \ | |
3445 \ | |
3446 product(intx, MaxDirectMemorySize, -1, \ | |
3447 "Maximum total size of NIO direct-buffer allocations") \ | |
3448 \ | |
3449 /* temporary developer defined flags */ \ | |
3450 \ | |
3451 diagnostic(bool, UseNewCode, false, \ | |
3452 "Testing Only: Use the new version while testing") \ | |
3453 \ | |
3454 diagnostic(bool, UseNewCode2, false, \ | |
3455 "Testing Only: Use the new version while testing") \ | |
3456 \ | |
3457 diagnostic(bool, UseNewCode3, false, \ | |
3458 "Testing Only: Use the new version while testing") \ | |
3459 \ | |
3460 /* flags for performance data collection */ \ | |
3461 \ | |
3462 product(bool, UsePerfData, true, \ | |
3463 "Flag to disable jvmstat instrumentation for performance testing" \ | |
3464 "and problem isolation purposes.") \ | |
3465 \ | |
3466 product(bool, PerfDataSaveToFile, false, \ | |
3467 "Save PerfData memory to hsperfdata_<pid> file on exit") \ | |
3468 \ | |
3469 product(ccstr, PerfDataSaveFile, NULL, \ | |
3470 "Save PerfData memory to the specified absolute pathname," \ | |
3471 "%p in the file name if present will be replaced by pid") \ | |
3472 \ | |
3473 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ | |
3474 "Data sampling interval in milliseconds") \ | |
3475 \ | |
3476 develop(bool, PerfTraceDataCreation, false, \ | |
3477 "Trace creation of Performance Data Entries") \ | |
3478 \ | |
3479 develop(bool, PerfTraceMemOps, false, \ | |
3480 "Trace PerfMemory create/attach/detach calls") \ | |
3481 \ | |
3482 product(bool, PerfDisableSharedMem, false, \ | |
3483 "Store performance data in standard memory") \ | |
3484 \ | |
3485 product(intx, PerfDataMemorySize, 32*K, \ | |
3486 "Size of performance data memory region. Will be rounded " \ | |
3487 "up to a multiple of the native os page size.") \ | |
3488 \ | |
3489 product(intx, PerfMaxStringConstLength, 1024, \ | |
3490 "Maximum PerfStringConstant string length before truncation") \ | |
3491 \ | |
3492 product(bool, PerfAllowAtExitRegistration, false, \ | |
3493 "Allow registration of atexit() methods") \ | |
3494 \ | |
3495 product(bool, PerfBypassFileSystemCheck, false, \ | |
3496 "Bypass Win32 file system criteria checks (Windows Only)") \ | |
3497 \ | |
3498 product(intx, UnguardOnExecutionViolation, 0, \ | |
3499 "Unguard page and retry on no-execute fault (Win32 only)" \ | |
3500 "0=off, 1=conservative, 2=aggressive") \ | |
3501 \ | |
3502 /* Serviceability Support */ \ | |
3503 \ | |
3504 product(bool, ManagementServer, false, \ | |
3505 "Create JMX Management Server") \ | |
3506 \ | |
3507 product(bool, DisableAttachMechanism, false, \ | |
3508 "Disable mechanism that allows tools to attach to this VM") \ | |
3509 \ | |
3510 product(bool, StartAttachListener, false, \ | |
3511 "Always start Attach Listener at VM startup") \ | |
3512 \ | |
3513 manageable(bool, PrintConcurrentLocks, false, \ | |
3514 "Print java.util.concurrent locks in thread dump") \ | |
3515 \ | |
3516 /* Shared spaces */ \ | |
3517 \ | |
3518 product(bool, UseSharedSpaces, true, \ | |
3519 "Use shared spaces in the permanent generation") \ | |
3520 \ | |
3521 product(bool, RequireSharedSpaces, false, \ | |
3522 "Require shared spaces in the permanent generation") \ | |
3523 \ | |
3524 product(bool, ForceSharedSpaces, false, \ | |
3525 "Require shared spaces in the permanent generation") \ | |
3526 \ | |
3527 product(bool, DumpSharedSpaces, false, \ | |
3528 "Special mode: JVM reads a class list, loads classes, builds " \ | |
3529 "shared spaces, and dumps the shared spaces to a file to be " \ | |
3530 "used in future JVM runs.") \ | |
3531 \ | |
3532 product(bool, PrintSharedSpaces, false, \ | |
3533 "Print usage of shared spaces") \ | |
3534 \ | |
3535 product(uintx, SharedDummyBlockSize, 512*M, \ | |
3536 "Size of dummy block used to shift heap addresses (in bytes)") \ | |
3537 \ | |
3538 product(uintx, SharedReadWriteSize, 12*M, \ | |
3539 "Size of read-write space in permanent generation (in bytes)") \ | |
3540 \ | |
910
10d8c0d0d60e
6867645: java -Xshare:dump failed - read only space too small
jcoomes
parents:
909
diff
changeset
|
3541 product(uintx, SharedReadOnlySize, 10*M, \ |
0 | 3542 "Size of read-only space in permanent generation (in bytes)") \ |
3543 \ | |
3544 product(uintx, SharedMiscDataSize, 4*M, \ | |
3545 "Size of the shared data area adjacent to the heap (in bytes)") \ | |
3546 \ | |
3547 product(uintx, SharedMiscCodeSize, 4*M, \ | |
3548 "Size of the shared code area adjacent to the heap (in bytes)") \ | |
3549 \ | |
3550 diagnostic(bool, SharedOptimizeColdStart, true, \ | |
3551 "At dump time, order shared objects to achieve better " \ | |
3552 "cold startup time.") \ | |
3553 \ | |
3554 develop(intx, SharedOptimizeColdStartPolicy, 2, \ | |
3555 "Reordering policy for SharedOptimizeColdStart " \ | |
3556 "0=favor classload-time locality, 1=balanced, " \ | |
3557 "2=favor runtime locality") \ | |
3558 \ | |
3559 diagnostic(bool, SharedSkipVerify, false, \ | |
3560 "Skip assert() and verify() which page-in unwanted shared " \ | |
3561 "objects. ") \ | |
3562 \ | |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
406
diff
changeset
|
3563 product(bool, AnonymousClasses, false, \ |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
406
diff
changeset
|
3564 "support sun.misc.Unsafe.defineAnonymousClass") \ |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
406
diff
changeset
|
3565 \ |
905
bd2b1f617a4e
6868487: EnableInvokeDynamic and EnableMethodHandles should not be visible flags in JDK6 or JDK7
jrose
parents:
885
diff
changeset
|
3566 experimental(bool, EnableMethodHandles, false, \ |
710 | 3567 "support method handles (true by default under JSR 292)") \ |
3568 \ | |
3569 diagnostic(intx, MethodHandlePushLimit, 3, \ | |
3570 "number of additional stack slots a method handle may push") \ | |
3571 \ | |
3572 develop(bool, TraceMethodHandles, false, \ | |
3573 "trace internal method handle operations") \ | |
3574 \ | |
3575 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ | |
3576 "perform extra checks when constructing method handles") \ | |
3577 \ | |
3578 diagnostic(bool, OptimizeMethodHandles, true, \ | |
3579 "when constructing method handles, try to improve them") \ | |
3580 \ | |
1173
73b22f919c34
6912065: final fields in objects need to support inlining optimizations for JSR 292
jrose
parents:
1157
diff
changeset
|
3581 experimental(bool, TrustFinalNonStaticFields, false, \ |
73b22f919c34
6912065: final fields in objects need to support inlining optimizations for JSR 292
jrose
parents:
1157
diff
changeset
|
3582 "trust final non-static declarations for constant folding") \ |
73b22f919c34
6912065: final fields in objects need to support inlining optimizations for JSR 292
jrose
parents:
1157
diff
changeset
|
3583 \ |
905
bd2b1f617a4e
6868487: EnableInvokeDynamic and EnableMethodHandles should not be visible flags in JDK6 or JDK7
jrose
parents:
885
diff
changeset
|
3584 experimental(bool, EnableInvokeDynamic, false, \ |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3585 "recognize the invokedynamic instruction") \ |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3586 \ |
1660
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1644
diff
changeset
|
3587 experimental(bool, AllowTransitionalJSR292, true, \ |
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1644
diff
changeset
|
3588 "recognize pre-PFD formats of invokedynamic") \ |
083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
1644
diff
changeset
|
3589 \ |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3590 develop(bool, TraceInvokeDynamic, false, \ |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3591 "trace internal invoke dynamic operations") \ |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3592 \ |
0 | 3593 diagnostic(bool, PauseAtStartup, false, \ |
3594 "Causes the VM to pause at startup time and wait for the pause " \ | |
3595 "file to be removed (default: ./vm.paused.<pid>)") \ | |
3596 \ | |
3597 diagnostic(ccstr, PauseAtStartupFile, NULL, \ | |
3598 "The file to create and for whose removal to await when pausing " \ | |
3599 "at startup. (default: ./vm.paused.<pid>)") \ | |
3600 \ | |
3601 product(bool, ExtendedDTraceProbes, false, \ | |
3602 "Enable performance-impacting dtrace probes") \ | |
3603 \ | |
3604 product(bool, DTraceMethodProbes, false, \ | |
3605 "Enable dtrace probes for method-entry and method-exit") \ | |
3606 \ | |
3607 product(bool, DTraceAllocProbes, false, \ | |
3608 "Enable dtrace probes for object allocation") \ | |
3609 \ | |
3610 product(bool, DTraceMonitorProbes, false, \ | |
3611 "Enable dtrace probes for monitor events") \ | |
3612 \ | |
3613 product(bool, RelaxAccessControlCheck, false, \ | |
3614 "Relax the access control checks in the verifier") \ | |
3615 \ | |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3616 diagnostic(bool, PrintDTraceDOF, false, \ |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3617 "Print the DTrace DOF passed to the system for JSDT probes") \ |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
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3618 \ |
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3619 product(bool, UseVMInterruptibleIO, false, \ |
0 | 3620 "(Unstable, Solaris-specific) Thread interrupt before or with " \ |
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3621 "EINTR for I/O operations results in OS_INTRPT. The default value"\ |
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3622 " of this flag is true for JDK 6 and earliers") |
0 | 3623 |
3624 /* | |
3625 * Macros for factoring of globals | |
3626 */ | |
3627 | |
3628 // Interface macros | |
3629 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; | |
3630 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; | |
3631 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; | |
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3632 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; |
0 | 3633 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; |
3634 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; | |
3635 #ifdef PRODUCT | |
3636 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; | |
3637 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; | |
3638 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) | |
3639 #else | |
3640 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; | |
3641 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; | |
3642 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; | |
3643 #endif | |
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3644 // Special LP64 flags, product only needed for now. |
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3645 #ifdef _LP64 |
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3646 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; |
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3647 #else |
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3648 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; |
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3649 #endif // _LP64 |
0 | 3650 |
3651 // Implementation macros | |
3652 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; | |
3653 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; | |
3654 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; | |
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3655 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; |
0 | 3656 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; |
3657 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; | |
3658 #ifdef PRODUCT | |
3659 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ | |
3660 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ | |
3661 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) | |
3662 #else | |
3663 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; | |
3664 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; | |
3665 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; | |
3666 #endif | |
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3667 #ifdef _LP64 |
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3668 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; |
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3669 #else |
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3670 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ |
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3671 #endif // _LP64 |
0 | 3672 |
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3673 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG) |
0 | 3674 |
3675 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) |