Mercurial > hg > truffle
annotate src/share/vm/runtime/globals.hpp @ 616:4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
6720334: G1: don't update RSets of collection set regions during an evacuation pause
Summary: Introduced a deferred update mechanism for delaying the rset updates during the collection pause
Reviewed-by: apetrusenko, tonyp
author | iveresov |
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date | Fri, 06 Mar 2009 13:50:14 -0800 |
parents | c6c601a0f2d6 |
children | 7bb995fbd3c0 660978a2a31a |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #if !defined(COMPILER1) && !defined(COMPILER2) | |
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, Tier2CompileThreshold, 0); | |
39 define_pd_global(intx, Tier3CompileThreshold, 0); | |
40 define_pd_global(intx, Tier4CompileThreshold, 0); | |
41 | |
42 define_pd_global(intx, BackEdgeThreshold, 0); | |
43 define_pd_global(intx, Tier2BackEdgeThreshold, 0); | |
44 define_pd_global(intx, Tier3BackEdgeThreshold, 0); | |
45 define_pd_global(intx, Tier4BackEdgeThreshold, 0); | |
46 | |
47 define_pd_global(intx, OnStackReplacePercentage, 0); | |
48 define_pd_global(bool, ResizeTLAB, false); | |
49 define_pd_global(intx, FreqInlineSize, 0); | |
50 define_pd_global(intx, NewSizeThreadIncrease, 4*K); | |
51 define_pd_global(intx, NewRatio, 4); | |
52 define_pd_global(intx, InlineClassNatives, true); | |
53 define_pd_global(intx, InlineUnsafeOps, true); | |
54 define_pd_global(intx, InitialCodeCacheSize, 160*K); | |
55 define_pd_global(intx, ReservedCodeCacheSize, 32*M); | |
56 define_pd_global(intx, CodeCacheExpansionSize, 32*K); | |
57 define_pd_global(intx, CodeCacheMinBlockLength, 1); | |
58 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); | |
59 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); | |
60 define_pd_global(bool, NeverActAsServerClassMachine, true); | |
61 define_pd_global(uintx, DefaultMaxRAM, 1*G); | |
62 #define CI_COMPILER_COUNT 0 | |
63 #else | |
64 | |
65 #ifdef COMPILER2 | |
66 #define CI_COMPILER_COUNT 2 | |
67 #else | |
68 #define CI_COMPILER_COUNT 1 | |
69 #endif // COMPILER2 | |
70 | |
71 #endif // no compilers | |
72 | |
73 | |
74 // string type aliases used only in this file | |
75 typedef const char* ccstr; | |
76 typedef const char* ccstrlist; // represents string arguments which accumulate | |
77 | |
78 enum FlagValueOrigin { | |
79 DEFAULT = 0, | |
80 COMMAND_LINE = 1, | |
81 ENVIRON_VAR = 2, | |
82 CONFIG_FILE = 3, | |
83 MANAGEMENT = 4, | |
84 ERGONOMIC = 5, | |
85 ATTACH_ON_DEMAND = 6, | |
86 INTERNAL = 99 | |
87 }; | |
88 | |
89 struct Flag { | |
90 const char *type; | |
91 const char *name; | |
92 void* addr; | |
93 const char *kind; | |
94 FlagValueOrigin origin; | |
95 | |
96 // points to all Flags static array | |
97 static Flag *flags; | |
98 | |
99 // number of flags | |
100 static size_t numFlags; | |
101 | |
102 static Flag* find_flag(char* name, size_t length); | |
103 | |
104 bool is_bool() const { return strcmp(type, "bool") == 0; } | |
105 bool get_bool() const { return *((bool*) addr); } | |
106 void set_bool(bool value) { *((bool*) addr) = value; } | |
107 | |
108 bool is_intx() const { return strcmp(type, "intx") == 0; } | |
109 intx get_intx() const { return *((intx*) addr); } | |
110 void set_intx(intx value) { *((intx*) addr) = value; } | |
111 | |
112 bool is_uintx() const { return strcmp(type, "uintx") == 0; } | |
113 uintx get_uintx() const { return *((uintx*) addr); } | |
114 void set_uintx(uintx value) { *((uintx*) addr) = value; } | |
115 | |
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 | |
130 void print_on(outputStream* st); | |
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 | |
191 static bool doubleAt(char* name, size_t len, double* value); | |
192 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } | |
193 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); | |
194 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } | |
195 | |
196 static bool ccstrAt(char* name, size_t len, ccstr* value); | |
197 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } | |
198 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); | |
199 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } | |
200 | |
201 // Returns false if name is not a command line flag. | |
202 static bool wasSetOnCmdline(const char* name, bool* value); | |
203 static void printSetFlags(); | |
204 | |
205 static void printFlags() PRODUCT_RETURN; | |
206 | |
207 static void verify() PRODUCT_RETURN; | |
208 }; | |
209 | |
210 // use this for flags that are true by default in the debug version but | |
211 // false in the optimized version, and vice versa | |
212 #ifdef ASSERT | |
213 #define trueInDebug true | |
214 #define falseInDebug false | |
215 #else | |
216 #define trueInDebug false | |
217 #define falseInDebug true | |
218 #endif | |
219 | |
220 // use this for flags that are true per default in the product build | |
221 // but false in development builds, and vice versa | |
222 #ifdef PRODUCT | |
223 #define trueInProduct true | |
224 #define falseInProduct false | |
225 #else | |
226 #define trueInProduct false | |
227 #define falseInProduct true | |
228 #endif | |
229 | |
230 // use this for flags that are true per default in the tiered build | |
231 // but false in non-tiered builds, and vice versa | |
232 #ifdef TIERED | |
233 #define trueInTiered true | |
234 #define falseInTiered false | |
235 #else | |
236 #define trueInTiered false | |
237 #define falseInTiered true | |
238 #endif | |
239 | |
240 // develop flags are settable / visible only during development and are constant in the PRODUCT version | |
241 // product flags are always settable / visible | |
242 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version | |
243 | |
244 // A flag must be declared with one of the following types: | |
245 // bool, intx, uintx, ccstr. | |
246 // The type "ccstr" is an alias for "const char*" and is used | |
247 // only in this file, because the macrology requires single-token type names. | |
248 | |
249 // Note: Diagnostic options not meant for VM tuning or for product modes. | |
250 // They are to be used for VM quality assurance or field diagnosis | |
251 // of VM bugs. They are hidden so that users will not be encouraged to | |
252 // try them as if they were VM ordinary execution options. However, they | |
253 // are available in the product version of the VM. Under instruction | |
254 // from support engineers, VM customers can turn them on to collect | |
255 // diagnostic information about VM problems. To use a VM diagnostic | |
256 // option, you must first specify +UnlockDiagnosticVMOptions. | |
257 // (This master switch also affects the behavior of -Xprintflags.) | |
350
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258 // |
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259 // experimental flags are in support of features that are not |
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260 // part of the officially supported product, but are available |
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261 // for experimenting with. They could, for example, be performance |
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262 // features that may not have undergone full or rigorous QA, but which may |
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263 // help performance in some cases and released for experimentation |
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264 // by the community of users and developers. This flag also allows one to |
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265 // be able to build a fully supported product that nonetheless also |
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266 // ships with some unsupported, lightly tested, experimental features. |
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267 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding |
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268 // UnlockExperimentalVMOptions flag, which allows the control and |
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269 // modification of the experimental flags. |
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270 // |
0 | 271 // manageable flags are writeable external product flags. |
272 // They are dynamically writeable through the JDK management interface | |
273 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. | |
274 // These flags are external exported interface (see CCC). The list of | |
275 // manageable flags can be queried programmatically through the management | |
276 // interface. | |
277 // | |
278 // A flag can be made as "manageable" only if | |
279 // - the flag is defined in a CCC as an external exported interface. | |
280 // - the VM implementation supports dynamic setting of the flag. | |
281 // This implies that the VM must *always* query the flag variable | |
282 // and not reuse state related to the flag state at any given time. | |
283 // - you want the flag to be queried programmatically by the customers. | |
284 // | |
285 // product_rw flags are writeable internal product flags. | |
286 // They are like "manageable" flags but for internal/private use. | |
287 // The list of product_rw flags are internal/private flags which | |
288 // may be changed/removed in a future release. It can be set | |
289 // through the management interface to get/set value | |
290 // when the name of flag is supplied. | |
291 // | |
292 // A flag can be made as "product_rw" only if | |
293 // - the VM implementation supports dynamic setting of the flag. | |
294 // This implies that the VM must *always* query the flag variable | |
295 // and not reuse state related to the flag state at any given time. | |
296 // | |
297 // Note that when there is a need to support develop flags to be writeable, | |
298 // it can be done in the same way as product_rw. | |
299 | |
350
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300 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ |
113
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301 \ |
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302 lp64_product(bool, UseCompressedOops, false, \ |
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303 "Use 32-bit object references in 64-bit VM. " \ |
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304 "lp64_product means flag is always constant in 32 bit VM") \ |
0 | 305 \ |
164
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306 lp64_product(bool, CheckCompressedOops, trueInDebug, \ |
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307 "generate checks in encoding/decoding code") \ |
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308 \ |
325
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309 product(bool, UseImplicitNullCheckForNarrowOop, true, \ |
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310 "generate implicit null check in indexed addressing mode.") \ |
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311 \ |
0 | 312 /* UseMembar is theoretically a temp flag used for memory barrier \ |
313 * removal testing. It was supposed to be removed before FCS but has \ | |
314 * been re-added (see 6401008) */ \ | |
315 product(bool, UseMembar, false, \ | |
316 "(Unstable) Issues membars on thread state transitions") \ | |
317 \ | |
318 product(bool, PrintCommandLineFlags, false, \ | |
319 "Prints flags that appeared on the command line") \ | |
320 \ | |
321 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ | |
350
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322 "Enable normal processing of flags relating to field diagnostics")\ |
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323 \ |
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324 experimental(bool, UnlockExperimentalVMOptions, false, \ |
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325 "Enable normal processing of flags relating to experimental features")\ |
0 | 326 \ |
327 product(bool, JavaMonitorsInStackTrace, true, \ | |
328 "Print info. about Java monitor locks when the stacks are dumped")\ | |
329 \ | |
330 product_pd(bool, UseLargePages, \ | |
331 "Use large page memory") \ | |
332 \ | |
389
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333 product_pd(bool, UseLargePagesIndividualAllocation, \ |
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334 "Allocate large pages individually for better affinity") \ |
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335 \ |
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336 develop(bool, LargePagesIndividualAllocationInjectError, false, \ |
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337 "Fail large pages individual allocation") \ |
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338 \ |
0 | 339 develop(bool, TracePageSizes, false, \ |
340 "Trace page size selection and usage.") \ | |
341 \ | |
342 product(bool, UseNUMA, false, \ | |
343 "Use NUMA if available") \ | |
344 \ | |
462
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345 product(bool, ForceNUMA, false, \ |
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346 "Force NUMA optimizations on single-node/UMA systems") \ |
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347 \ |
0 | 348 product(intx, NUMAChunkResizeWeight, 20, \ |
349 "Percentage (0-100) used to weight the current sample when " \ | |
350 "computing exponentially decaying average for " \ | |
351 "AdaptiveNUMAChunkSizing") \ | |
352 \ | |
353 product(intx, NUMASpaceResizeRate, 1*G, \ | |
354 "Do not reallocate more that this amount per collection") \ | |
355 \ | |
356 product(bool, UseAdaptiveNUMAChunkSizing, true, \ | |
357 "Enable adaptive chunk sizing for NUMA") \ | |
358 \ | |
359 product(bool, NUMAStats, false, \ | |
360 "Print NUMA stats in detailed heap information") \ | |
361 \ | |
362 product(intx, NUMAPageScanRate, 256, \ | |
363 "Maximum number of pages to include in the page scan procedure") \ | |
364 \ | |
365 product_pd(bool, NeedsDeoptSuspend, \ | |
366 "True for register window machines (sparc/ia64)") \ | |
367 \ | |
368 product(intx, UseSSE, 99, \ | |
369 "Highest supported SSE instructions set on x86/x64") \ | |
370 \ | |
371 product(uintx, LargePageSizeInBytes, 0, \ | |
372 "Large page size (0 to let VM choose the page size") \ | |
373 \ | |
374 product(uintx, LargePageHeapSizeThreshold, 128*M, \ | |
375 "Use large pages if max heap is at least this big") \ | |
376 \ | |
377 product(bool, ForceTimeHighResolution, false, \ | |
378 "Using high time resolution(For Win32 only)") \ | |
379 \ | |
380 develop(bool, TraceItables, false, \ | |
381 "Trace initialization and use of itables") \ | |
382 \ | |
383 develop(bool, TracePcPatching, false, \ | |
384 "Trace usage of frame::patch_pc") \ | |
385 \ | |
386 develop(bool, TraceJumps, false, \ | |
387 "Trace assembly jumps in thread ring buffer") \ | |
388 \ | |
389 develop(bool, TraceRelocator, false, \ | |
390 "Trace the bytecode relocator") \ | |
391 \ | |
392 develop(bool, TraceLongCompiles, false, \ | |
393 "Print out every time compilation is longer than " \ | |
394 "a given threashold") \ | |
395 \ | |
396 develop(bool, SafepointALot, false, \ | |
397 "Generates a lot of safepoints. Works with " \ | |
398 "GuaranteedSafepointInterval") \ | |
399 \ | |
400 product_pd(bool, BackgroundCompilation, \ | |
401 "A thread requesting compilation is not blocked during " \ | |
402 "compilation") \ | |
403 \ | |
404 product(bool, PrintVMQWaitTime, false, \ | |
405 "Prints out the waiting time in VM operation queue") \ | |
406 \ | |
407 develop(bool, BailoutToInterpreterForThrows, false, \ | |
408 "Compiled methods which throws/catches exceptions will be " \ | |
409 "deopt and intp.") \ | |
410 \ | |
411 develop(bool, NoYieldsInMicrolock, false, \ | |
412 "Disable yields in microlock") \ | |
413 \ | |
414 develop(bool, TraceOopMapGeneration, false, \ | |
415 "Shows oopmap generation") \ | |
416 \ | |
417 product(bool, MethodFlushing, true, \ | |
418 "Reclamation of zombie and not-entrant methods") \ | |
419 \ | |
420 develop(bool, VerifyStack, false, \ | |
421 "Verify stack of each thread when it is entering a runtime call") \ | |
422 \ | |
423 develop(bool, ForceUnreachable, false, \ | |
424 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ | |
425 \ | |
426 notproduct(bool, StressDerivedPointers, false, \ | |
427 "Force scavenge when a derived pointers is detected on stack " \ | |
428 "after rtm call") \ | |
429 \ | |
430 develop(bool, TraceDerivedPointers, false, \ | |
431 "Trace traversal of derived pointers on stack") \ | |
432 \ | |
433 notproduct(bool, TraceCodeBlobStacks, false, \ | |
434 "Trace stack-walk of codeblobs") \ | |
435 \ | |
436 product(bool, PrintJNIResolving, false, \ | |
437 "Used to implement -v:jni") \ | |
438 \ | |
439 notproduct(bool, PrintRewrites, false, \ | |
440 "Print methods that are being rewritten") \ | |
441 \ | |
442 product(bool, UseInlineCaches, true, \ | |
443 "Use Inline Caches for virtual calls ") \ | |
444 \ | |
445 develop(bool, InlineArrayCopy, true, \ | |
446 "inline arraycopy native that is known to be part of " \ | |
447 "base library DLL") \ | |
448 \ | |
449 develop(bool, InlineObjectHash, true, \ | |
450 "inline Object::hashCode() native that is known to be part " \ | |
451 "of base library DLL") \ | |
452 \ | |
453 develop(bool, InlineObjectCopy, true, \ | |
454 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ | |
455 \ | |
456 develop(bool, InlineNatives, true, \ | |
457 "inline natives that are known to be part of base library DLL") \ | |
458 \ | |
459 develop(bool, InlineMathNatives, true, \ | |
460 "inline SinD, CosD, etc.") \ | |
461 \ | |
462 develop(bool, InlineClassNatives, true, \ | |
463 "inline Class.isInstance, etc") \ | |
464 \ | |
465 develop(bool, InlineAtomicLong, true, \ | |
466 "inline sun.misc.AtomicLong") \ | |
467 \ | |
468 develop(bool, InlineThreadNatives, true, \ | |
469 "inline Thread.currentThread, etc") \ | |
470 \ | |
471 develop(bool, InlineReflectionGetCallerClass, true, \ | |
472 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ | |
473 "of base library DLL") \ | |
474 \ | |
475 develop(bool, InlineUnsafeOps, true, \ | |
476 "inline memory ops (native methods) from sun.misc.Unsafe") \ | |
477 \ | |
478 develop(bool, ConvertCmpD2CmpF, true, \ | |
479 "Convert cmpD to cmpF when one input is constant in float range") \ | |
480 \ | |
481 develop(bool, ConvertFloat2IntClipping, true, \ | |
482 "Convert float2int clipping idiom to integer clipping") \ | |
483 \ | |
484 develop(bool, SpecialStringCompareTo, true, \ | |
485 "special version of string compareTo") \ | |
486 \ | |
487 develop(bool, SpecialStringIndexOf, true, \ | |
488 "special version of string indexOf") \ | |
489 \ | |
174
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490 product(bool, SpecialArraysEquals, false, \ |
169
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491 "special version of Arrays.equals(char[],char[])") \ |
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492 \ |
0 | 493 develop(bool, TraceCallFixup, false, \ |
494 "traces all call fixups") \ | |
495 \ | |
496 develop(bool, DeoptimizeALot, false, \ | |
497 "deoptimize at every exit from the runtime system") \ | |
498 \ | |
434 | 499 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ |
0 | 500 "a comma separated list of bcis to deoptimize at") \ |
501 \ | |
502 product(bool, DeoptimizeRandom, false, \ | |
503 "deoptimize random frames on random exit from the runtime system")\ | |
504 \ | |
505 notproduct(bool, ZombieALot, false, \ | |
506 "creates zombies (non-entrant) at exit from the runt. system") \ | |
507 \ | |
508 notproduct(bool, WalkStackALot, false, \ | |
509 "trace stack (no print) at every exit from the runtime system") \ | |
510 \ | |
511 develop(bool, Debugging, false, \ | |
512 "set when executing debug methods in debug.ccp " \ | |
513 "(to prevent triggering assertions)") \ | |
514 \ | |
515 notproduct(bool, StrictSafepointChecks, trueInDebug, \ | |
516 "Enable strict checks that safepoints cannot happen for threads " \ | |
517 "that used No_Safepoint_Verifier") \ | |
518 \ | |
519 notproduct(bool, VerifyLastFrame, false, \ | |
520 "Verify oops on last frame on entry to VM") \ | |
521 \ | |
522 develop(bool, TraceHandleAllocation, false, \ | |
523 "Prints out warnings when suspicious many handles are allocated") \ | |
524 \ | |
525 product(bool, UseCompilerSafepoints, true, \ | |
526 "Stop at safepoints in compiled code") \ | |
527 \ | |
528 product(bool, UseSplitVerifier, true, \ | |
529 "use split verifier with StackMapTable attributes") \ | |
530 \ | |
531 product(bool, FailOverToOldVerifier, true, \ | |
532 "fail over to old verifier when split verifier fails") \ | |
533 \ | |
534 develop(bool, ShowSafepointMsgs, false, \ | |
535 "Show msg. about safepoint synch.") \ | |
536 \ | |
537 product(bool, SafepointTimeout, false, \ | |
538 "Time out and warn or fail after SafepointTimeoutDelay " \ | |
539 "milliseconds if failed to reach safepoint") \ | |
540 \ | |
541 develop(bool, DieOnSafepointTimeout, false, \ | |
542 "Die upon failure to reach safepoint (see SafepointTimeout)") \ | |
543 \ | |
544 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ | |
545 /* typically, at most a few retries are needed */ \ | |
546 product(intx, SuspendRetryCount, 50, \ | |
547 "Maximum retry count for an external suspend request") \ | |
548 \ | |
549 product(intx, SuspendRetryDelay, 5, \ | |
550 "Milliseconds to delay per retry (* current_retry_count)") \ | |
551 \ | |
552 product(bool, AssertOnSuspendWaitFailure, false, \ | |
553 "Assert/Guarantee on external suspend wait failure") \ | |
554 \ | |
555 product(bool, TraceSuspendWaitFailures, false, \ | |
556 "Trace external suspend wait failures") \ | |
557 \ | |
558 product(bool, MaxFDLimit, true, \ | |
559 "Bump the number of file descriptors to max in solaris.") \ | |
560 \ | |
561 notproduct(bool, LogEvents, trueInDebug, \ | |
562 "Enable Event log") \ | |
563 \ | |
564 product(bool, BytecodeVerificationRemote, true, \ | |
565 "Enables the Java bytecode verifier for remote classes") \ | |
566 \ | |
567 product(bool, BytecodeVerificationLocal, false, \ | |
568 "Enables the Java bytecode verifier for local classes") \ | |
569 \ | |
570 develop(bool, ForceFloatExceptions, trueInDebug, \ | |
571 "Force exceptions on FP stack under/overflow") \ | |
572 \ | |
573 develop(bool, SoftMatchFailure, trueInProduct, \ | |
574 "If the DFA fails to match a node, print a message and bail out") \ | |
575 \ | |
576 develop(bool, VerifyStackAtCalls, false, \ | |
577 "Verify that the stack pointer is unchanged after calls") \ | |
578 \ | |
579 develop(bool, TraceJavaAssertions, false, \ | |
580 "Trace java language assertions") \ | |
581 \ | |
582 notproduct(bool, CheckAssertionStatusDirectives, false, \ | |
583 "temporary - see javaClasses.cpp") \ | |
584 \ | |
585 notproduct(bool, PrintMallocFree, false, \ | |
586 "Trace calls to C heap malloc/free allocation") \ | |
587 \ | |
588 notproduct(bool, PrintOopAddress, false, \ | |
589 "Always print the location of the oop") \ | |
590 \ | |
591 notproduct(bool, VerifyCodeCacheOften, false, \ | |
592 "Verify compiled-code cache often") \ | |
593 \ | |
594 develop(bool, ZapDeadCompiledLocals, false, \ | |
595 "Zap dead locals in compiler frames") \ | |
596 \ | |
597 notproduct(bool, ZapDeadLocalsOld, false, \ | |
598 "Zap dead locals (old version, zaps all frames when " \ | |
599 "entering the VM") \ | |
600 \ | |
601 notproduct(bool, CheckOopishValues, false, \ | |
602 "Warn if value contains oop ( requires ZapDeadLocals)") \ | |
603 \ | |
604 develop(bool, UseMallocOnly, false, \ | |
605 "use only malloc/free for allocation (no resource area/arena)") \ | |
606 \ | |
607 develop(bool, PrintMalloc, false, \ | |
608 "print all malloc/free calls") \ | |
609 \ | |
610 develop(bool, ZapResourceArea, trueInDebug, \ | |
611 "Zap freed resource/arena space with 0xABABABAB") \ | |
612 \ | |
613 notproduct(bool, ZapVMHandleArea, trueInDebug, \ | |
614 "Zap freed VM handle space with 0xBCBCBCBC") \ | |
615 \ | |
616 develop(bool, ZapJNIHandleArea, trueInDebug, \ | |
617 "Zap freed JNI handle space with 0xFEFEFEFE") \ | |
618 \ | |
263
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619 develop(bool, ZapUnusedHeapArea, trueInDebug, \ |
0 | 620 "Zap unused heap space with 0xBAADBABE") \ |
621 \ | |
263
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622 develop(bool, TraceZapUnusedHeapArea, false, \ |
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623 "Trace zapping of unused heap space") \ |
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624 \ |
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625 develop(bool, CheckZapUnusedHeapArea, false, \ |
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626 "Check zapping of unused heap space") \ |
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627 \ |
481
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628 develop(bool, ZapFillerObjects, trueInDebug, \ |
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629 "Zap filler objects with 0xDEAFBABE") \ |
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630 \ |
0 | 631 develop(bool, PrintVMMessages, true, \ |
632 "Print vm messages on console") \ | |
633 \ | |
634 product(bool, PrintGCApplicationConcurrentTime, false, \ | |
635 "Print the time the application has been running") \ | |
636 \ | |
637 product(bool, PrintGCApplicationStoppedTime, false, \ | |
638 "Print the time the application has been stopped") \ | |
639 \ | |
640 develop(bool, Verbose, false, \ | |
641 "Prints additional debugging information from other modes") \ | |
642 \ | |
643 develop(bool, PrintMiscellaneous, false, \ | |
644 "Prints uncategorized debugging information (requires +Verbose)") \ | |
645 \ | |
646 develop(bool, WizardMode, false, \ | |
647 "Prints much more debugging information") \ | |
648 \ | |
649 product(bool, ShowMessageBoxOnError, false, \ | |
650 "Keep process alive on VM fatal error") \ | |
651 \ | |
652 product_pd(bool, UseOSErrorReporting, \ | |
653 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ | |
654 \ | |
655 product(bool, SuppressFatalErrorMessage, false, \ | |
656 "Do NO Fatal Error report [Avoid deadlock]") \ | |
657 \ | |
658 product(ccstrlist, OnError, "", \ | |
659 "Run user-defined commands on fatal error; see VMError.cpp " \ | |
660 "for examples") \ | |
661 \ | |
662 product(ccstrlist, OnOutOfMemoryError, "", \ | |
663 "Run user-defined commands on first java.lang.OutOfMemoryError") \ | |
664 \ | |
615
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665 manageable(bool, HeapDumpBeforeFullGC, false, \ |
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666 "Dump heap to file before any major stop-world GC") \ |
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667 \ |
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668 manageable(bool, HeapDumpAfterFullGC, false, \ |
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669 "Dump heap to file after any major stop-world GC") \ |
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670 \ |
0 | 671 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ |
672 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ | |
673 \ | |
674 manageable(ccstr, HeapDumpPath, NULL, \ | |
675 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ | |
676 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ | |
677 "in the working directory)") \ | |
678 \ | |
679 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ | |
680 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ | |
681 "when the heap usage is larger than this") \ | |
682 \ | |
683 develop(uintx, HeapDumpSegmentSize, 1*G, \ | |
684 "Approximate segment size when generating a segmented heap dump") \ | |
685 \ | |
686 develop(bool, BreakAtWarning, false, \ | |
687 "Execute breakpoint upon encountering VM warning") \ | |
688 \ | |
689 product_pd(bool, UseVectoredExceptions, \ | |
690 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ | |
691 \ | |
692 develop(bool, TraceVMOperation, false, \ | |
693 "Trace vm operations") \ | |
694 \ | |
695 develop(bool, UseFakeTimers, false, \ | |
696 "Tells whether the VM should use system time or a fake timer") \ | |
697 \ | |
698 diagnostic(bool, LogCompilation, false, \ | |
699 "Log compilation activity in detail to hotspot.log or LogFile") \ | |
700 \ | |
701 product(bool, PrintCompilation, false, \ | |
702 "Print compilations") \ | |
703 \ | |
704 diagnostic(bool, TraceNMethodInstalls, false, \ | |
705 "Trace nmethod intallation") \ | |
706 \ | |
707 diagnostic(bool, TraceOSRBreakpoint, false, \ | |
708 "Trace OSR Breakpoint ") \ | |
709 \ | |
710 diagnostic(bool, TraceCompileTriggered, false, \ | |
711 "Trace compile triggered") \ | |
712 \ | |
713 diagnostic(bool, TraceTriggers, false, \ | |
714 "Trace triggers") \ | |
715 \ | |
716 product(bool, AlwaysRestoreFPU, false, \ | |
717 "Restore the FPU control word after every JNI call (expensive)") \ | |
718 \ | |
719 notproduct(bool, PrintCompilation2, false, \ | |
720 "Print additional statistics per compilation") \ | |
721 \ | |
100
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722 diagnostic(bool, PrintAdapterHandlers, false, \ |
0 | 723 "Print code generated for i2c/c2i adapters") \ |
724 \ | |
100
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725 diagnostic(bool, PrintAssembly, false, \ |
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726 "Print assembly code (using external disassembler.so)") \ |
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727 \ |
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728 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ |
100
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729 "Options string passed to disassembler.so") \ |
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730 \ |
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731 diagnostic(bool, PrintNMethods, false, \ |
0 | 732 "Print assembly code for nmethods when generated") \ |
733 \ | |
100
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734 diagnostic(bool, PrintNativeNMethods, false, \ |
0 | 735 "Print assembly code for native nmethods when generated") \ |
736 \ | |
737 develop(bool, PrintDebugInfo, false, \ | |
738 "Print debug information for all nmethods when generated") \ | |
739 \ | |
740 develop(bool, PrintRelocations, false, \ | |
741 "Print relocation information for all nmethods when generated") \ | |
742 \ | |
743 develop(bool, PrintDependencies, false, \ | |
744 "Print dependency information for all nmethods when generated") \ | |
745 \ | |
746 develop(bool, PrintExceptionHandlers, false, \ | |
747 "Print exception handler tables for all nmethods when generated") \ | |
748 \ | |
749 develop(bool, InterceptOSException, false, \ | |
750 "Starts debugger when an implicit OS (e.g., NULL) " \ | |
751 "exception happens") \ | |
752 \ | |
753 notproduct(bool, PrintCodeCache, false, \ | |
754 "Print the compiled_code cache when exiting") \ | |
755 \ | |
756 develop(bool, PrintCodeCache2, false, \ | |
757 "Print detailed info on the compiled_code cache when exiting") \ | |
758 \ | |
100
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759 diagnostic(bool, PrintStubCode, false, \ |
0 | 760 "Print generated stub code") \ |
761 \ | |
762 product(bool, StackTraceInThrowable, true, \ | |
763 "Collect backtrace in throwable when exception happens") \ | |
764 \ | |
765 product(bool, OmitStackTraceInFastThrow, true, \ | |
766 "Omit backtraces for some 'hot' exceptions in optimized code") \ | |
767 \ | |
768 product(bool, ProfilerPrintByteCodeStatistics, false, \ | |
769 "Prints byte code statictics when dumping profiler output") \ | |
770 \ | |
771 product(bool, ProfilerRecordPC, false, \ | |
772 "Collects tick for each 16 byte interval of compiled code") \ | |
773 \ | |
774 product(bool, ProfileVM, false, \ | |
775 "Profiles ticks that fall within VM (either in the VM Thread " \ | |
776 "or VM code called through stubs)") \ | |
777 \ | |
778 product(bool, ProfileIntervals, false, \ | |
779 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ | |
780 \ | |
781 notproduct(bool, ProfilerCheckIntervals, false, \ | |
782 "Collect and print info on spacing of profiler ticks") \ | |
783 \ | |
784 develop(bool, PrintJVMWarnings, false, \ | |
785 "Prints warnings for unimplemented JVM functions") \ | |
786 \ | |
787 notproduct(uintx, WarnOnStalledSpinLock, 0, \ | |
788 "Prints warnings for stalled SpinLocks") \ | |
789 \ | |
790 develop(bool, InitializeJavaLangSystem, true, \ | |
791 "Initialize java.lang.System - turn off for individual " \ | |
792 "method debugging") \ | |
793 \ | |
794 develop(bool, InitializeJavaLangString, true, \ | |
795 "Initialize java.lang.String - turn off for individual " \ | |
796 "method debugging") \ | |
797 \ | |
798 develop(bool, InitializeJavaLangExceptionsErrors, true, \ | |
799 "Initialize various error and exception classes - turn off for " \ | |
800 "individual method debugging") \ | |
801 \ | |
802 product(bool, RegisterFinalizersAtInit, true, \ | |
803 "Register finalizable objects at end of Object.<init> or " \ | |
804 "after allocation.") \ | |
805 \ | |
806 develop(bool, RegisterReferences, true, \ | |
807 "Tells whether the VM should register soft/weak/final/phantom " \ | |
808 "references") \ | |
809 \ | |
810 develop(bool, IgnoreRewrites, false, \ | |
811 "Supress rewrites of bytecodes in the oopmap generator. " \ | |
812 "This is unsafe!") \ | |
813 \ | |
814 develop(bool, PrintCodeCacheExtension, false, \ | |
815 "Print extension of code cache") \ | |
816 \ | |
817 develop(bool, UsePrivilegedStack, true, \ | |
818 "Enable the security JVM functions") \ | |
819 \ | |
820 develop(bool, IEEEPrecision, true, \ | |
821 "Enables IEEE precision (for INTEL only)") \ | |
822 \ | |
823 develop(bool, ProtectionDomainVerification, true, \ | |
824 "Verifies protection domain before resolution in system " \ | |
825 "dictionary") \ | |
826 \ | |
827 product(bool, ClassUnloading, true, \ | |
828 "Do unloading of classes") \ | |
829 \ | |
474
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830 diagnostic(bool, LinkWellKnownClasses, false, \ |
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831 "Resolve a well known class as soon as its name is seen") \ |
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832 \ |
0 | 833 develop(bool, DisableStartThread, false, \ |
834 "Disable starting of additional Java threads " \ | |
835 "(for debugging only)") \ | |
836 \ | |
837 develop(bool, MemProfiling, false, \ | |
838 "Write memory usage profiling to log file") \ | |
839 \ | |
840 notproduct(bool, PrintSystemDictionaryAtExit, false, \ | |
841 "Prints the system dictionary at exit") \ | |
842 \ | |
843 diagnostic(bool, UnsyncloadClass, false, \ | |
514 | 844 "Unstable: VM calls loadClass unsynchronized. Custom " \ |
845 "class loader must call VM synchronized for findClass " \ | |
846 "and defineClass.") \ | |
847 \ | |
848 product(bool, AlwaysLockClassLoader, false, \ | |
849 "Require the VM to acquire the class loader lock before calling " \ | |
850 "loadClass() even for class loaders registering " \ | |
851 "as parallel capable. Default false. ") \ | |
852 \ | |
853 product(bool, AllowParallelDefineClass, false, \ | |
854 "Allow parallel defineClass requests for class loaders " \ | |
855 "registering as parallel capable. Default false") \ | |
856 \ | |
857 product(bool, MustCallLoadClassInternal, false, \ | |
858 "Call loadClassInternal() rather than loadClass().Default false") \ | |
0 | 859 \ |
860 product_pd(bool, DontYieldALot, \ | |
861 "Throw away obvious excess yield calls (for SOLARIS only)") \ | |
862 \ | |
863 product_pd(bool, ConvertSleepToYield, \ | |
864 "Converts sleep(0) to thread yield " \ | |
865 "(may be off for SOLARIS to improve GUI)") \ | |
866 \ | |
867 product(bool, ConvertYieldToSleep, false, \ | |
868 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ | |
869 "behavior (SOLARIS only)") \ | |
870 \ | |
871 product(bool, UseBoundThreads, true, \ | |
872 "Bind user level threads to kernel threads (for SOLARIS only)") \ | |
873 \ | |
874 develop(bool, UseDetachedThreads, true, \ | |
875 "Use detached threads that are recycled upon termination " \ | |
876 "(for SOLARIS only)") \ | |
877 \ | |
878 product(bool, UseLWPSynchronization, true, \ | |
879 "Use LWP-based instead of libthread-based synchronization " \ | |
880 "(SPARC only)") \ | |
881 \ | |
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882 product(ccstr, SyncKnobs, NULL, \ |
0 | 883 "(Unstable) Various monitor synchronization tunables") \ |
884 \ | |
885 product(intx, EmitSync, 0, \ | |
886 "(Unsafe,Unstable) " \ | |
887 " Controls emission of inline sync fast-path code") \ | |
888 \ | |
889 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ | |
890 \ | |
891 product(intx, Atomics, 0, \ | |
892 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ | |
893 \ | |
894 product(intx, FenceInstruction, 0, \ | |
895 "(Unsafe,Unstable) Experimental") \ | |
896 \ | |
897 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ | |
898 \ | |
899 product(intx, SyncVerbose, 0, "(Unstable)" ) \ | |
900 \ | |
901 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ | |
902 \ | |
903 product(intx, hashCode, 0, \ | |
904 "(Unstable) select hashCode generation algorithm" ) \ | |
905 \ | |
906 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ | |
907 "(Unstable, Linux-specific)" \ | |
908 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ | |
909 \ | |
910 product(bool, FilterSpuriousWakeups , true, \ | |
911 "Prevent spurious or premature wakeups from object.wait" \ | |
912 "(Solaris only)") \ | |
913 \ | |
914 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ | |
915 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ | |
916 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ | |
917 \ | |
918 develop(bool, UsePthreads, false, \ | |
919 "Use pthread-based instead of libthread-based synchronization " \ | |
920 "(SPARC only)") \ | |
921 \ | |
922 product(bool, AdjustConcurrency, false, \ | |
923 "call thr_setconcurrency at thread create time to avoid " \ | |
924 "LWP starvation on MP systems (For Solaris Only)") \ | |
925 \ | |
926 develop(bool, UpdateHotSpotCompilerFileOnError, true, \ | |
927 "Should the system attempt to update the compiler file when " \ | |
928 "an error occurs?") \ | |
929 \ | |
930 product(bool, ReduceSignalUsage, false, \ | |
931 "Reduce the use of OS signals in Java and/or the VM") \ | |
932 \ | |
933 notproduct(bool, ValidateMarkSweep, false, \ | |
934 "Do extra validation during MarkSweep collection") \ | |
935 \ | |
936 notproduct(bool, RecordMarkSweepCompaction, false, \ | |
937 "Enable GC-to-GC recording and querying of compaction during " \ | |
938 "MarkSweep") \ | |
939 \ | |
940 develop_pd(bool, ShareVtableStubs, \ | |
941 "Share vtable stubs (smaller code but worse branch prediction") \ | |
942 \ | |
943 develop(bool, LoadLineNumberTables, true, \ | |
944 "Tells whether the class file parser loads line number tables") \ | |
945 \ | |
946 develop(bool, LoadLocalVariableTables, true, \ | |
947 "Tells whether the class file parser loads local variable tables")\ | |
948 \ | |
949 develop(bool, LoadLocalVariableTypeTables, true, \ | |
950 "Tells whether the class file parser loads local variable type tables")\ | |
951 \ | |
952 product(bool, AllowUserSignalHandlers, false, \ | |
953 "Do not complain if the application installs signal handlers " \ | |
954 "(Solaris & Linux only)") \ | |
955 \ | |
956 product(bool, UseSignalChaining, true, \ | |
957 "Use signal-chaining to invoke signal handlers installed " \ | |
958 "by the application (Solaris & Linux only)") \ | |
959 \ | |
960 product(bool, UseAltSigs, false, \ | |
961 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ | |
962 "internal signals. (Solaris only)") \ | |
963 \ | |
964 product(bool, UseSpinning, false, \ | |
965 "Use spinning in monitor inflation and before entry") \ | |
966 \ | |
967 product(bool, PreSpinYield, false, \ | |
968 "Yield before inner spinning loop") \ | |
969 \ | |
970 product(bool, PostSpinYield, true, \ | |
971 "Yield after inner spinning loop") \ | |
972 \ | |
973 product(bool, AllowJNIEnvProxy, false, \ | |
974 "Allow JNIEnv proxies for jdbx") \ | |
975 \ | |
976 product(bool, JNIDetachReleasesMonitors, true, \ | |
977 "JNI DetachCurrentThread releases monitors owned by thread") \ | |
978 \ | |
979 product(bool, RestoreMXCSROnJNICalls, false, \ | |
980 "Restore MXCSR when returning from JNI calls") \ | |
981 \ | |
982 product(bool, CheckJNICalls, false, \ | |
983 "Verify all arguments to JNI calls") \ | |
984 \ | |
985 product(bool, UseFastJNIAccessors, true, \ | |
986 "Use optimized versions of Get<Primitive>Field") \ | |
987 \ | |
988 product(bool, EagerXrunInit, false, \ | |
989 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ | |
990 " but not all -Xrun libraries may support the state of the VM at this time") \ | |
991 \ | |
992 product(bool, PreserveAllAnnotations, false, \ | |
993 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ | |
994 \ | |
995 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ | |
996 "Number of OutOfMemoryErrors preallocated with backtrace") \ | |
997 \ | |
998 product(bool, LazyBootClassLoader, true, \ | |
999 "Enable/disable lazy opening of boot class path entries") \ | |
1000 \ | |
1001 diagnostic(bool, UseIncDec, true, \ | |
1002 "Use INC, DEC instructions on x86") \ | |
1003 \ | |
219 | 1004 product(bool, UseNewLongLShift, false, \ |
1005 "Use optimized bitwise shift left") \ | |
1006 \ | |
0 | 1007 product(bool, UseStoreImmI16, true, \ |
1008 "Use store immediate 16-bits value instruction on x86") \ | |
1009 \ | |
1010 product(bool, UseAddressNop, false, \ | |
1011 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ | |
1012 \ | |
1013 product(bool, UseXmmLoadAndClearUpper, true, \ | |
1014 "Load low part of XMM register and clear upper part") \ | |
1015 \ | |
1016 product(bool, UseXmmRegToRegMoveAll, false, \ | |
1017 "Copy all XMM register bits when moving value between registers") \ | |
1018 \ | |
71 | 1019 product(bool, UseXmmI2D, false, \ |
1020 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ | |
1021 \ | |
1022 product(bool, UseXmmI2F, false, \ | |
1023 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ | |
1024 \ | |
405 | 1025 product(bool, UseXMMForArrayCopy, false, \ |
1026 "Use SSE2 MOVQ instruction for Arraycopy") \ | |
1027 \ | |
1028 product(bool, UseUnalignedLoadStores, false, \ | |
1029 "Use SSE2 MOVDQU instruction for Arraycopy") \ | |
1030 \ | |
0 | 1031 product(intx, FieldsAllocationStyle, 1, \ |
1032 "0 - type based with oops first, 1 - with oops last") \ | |
1033 \ | |
1034 product(bool, CompactFields, true, \ | |
1035 "Allocate nonstatic fields in gaps between previous fields") \ | |
1036 \ | |
1037 notproduct(bool, PrintCompactFieldsSavings, false, \ | |
1038 "Print how many words were saved with CompactFields") \ | |
1039 \ | |
1040 product(bool, UseBiasedLocking, true, \ | |
1041 "Enable biased locking in JVM") \ | |
1042 \ | |
1043 product(intx, BiasedLockingStartupDelay, 4000, \ | |
1044 "Number of milliseconds to wait before enabling biased locking") \ | |
1045 \ | |
1046 diagnostic(bool, PrintBiasedLockingStatistics, false, \ | |
1047 "Print statistics of biased locking in JVM") \ | |
1048 \ | |
1049 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ | |
1050 "Threshold of number of revocations per type to try to " \ | |
1051 "rebias all objects in the heap of that type") \ | |
1052 \ | |
1053 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ | |
1054 "Threshold of number of revocations per type to permanently " \ | |
1055 "revoke biases of all objects in the heap of that type") \ | |
1056 \ | |
1057 product(intx, BiasedLockingDecayTime, 25000, \ | |
1058 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ | |
1059 "type after previous bulk rebias") \ | |
1060 \ | |
1061 /* tracing */ \ | |
1062 \ | |
1063 notproduct(bool, TraceRuntimeCalls, false, \ | |
1064 "Trace run-time calls") \ | |
1065 \ | |
1066 develop(bool, TraceJNICalls, false, \ | |
1067 "Trace JNI calls") \ | |
1068 \ | |
1069 notproduct(bool, TraceJVMCalls, false, \ | |
1070 "Trace JVM calls") \ | |
1071 \ | |
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1072 product(ccstr, TraceJVMTI, NULL, \ |
0 | 1073 "Trace flags for JVMTI functions and events") \ |
1074 \ | |
1075 /* This option can change an EMCP method into an obsolete method. */ \ | |
1076 /* This can affect tests that except specific methods to be EMCP. */ \ | |
1077 /* This option should be used with caution. */ \ | |
1078 product(bool, StressLdcRewrite, false, \ | |
1079 "Force ldc -> ldc_w rewrite during RedefineClasses") \ | |
1080 \ | |
1081 product(intx, TraceRedefineClasses, 0, \ | |
1082 "Trace level for JVMTI RedefineClasses") \ | |
1083 \ | |
1084 /* change to false by default sometime after Mustang */ \ | |
1085 product(bool, VerifyMergedCPBytecodes, true, \ | |
1086 "Verify bytecodes after RedefineClasses constant pool merging") \ | |
1087 \ | |
1088 develop(bool, TraceJNIHandleAllocation, false, \ | |
1089 "Trace allocation/deallocation of JNI handle blocks") \ | |
1090 \ | |
1091 develop(bool, TraceThreadEvents, false, \ | |
1092 "Trace all thread events") \ | |
1093 \ | |
1094 develop(bool, TraceBytecodes, false, \ | |
1095 "Trace bytecode execution") \ | |
1096 \ | |
1097 develop(bool, TraceClassInitialization, false, \ | |
1098 "Trace class initialization") \ | |
1099 \ | |
1100 develop(bool, TraceExceptions, false, \ | |
1101 "Trace exceptions") \ | |
1102 \ | |
1103 develop(bool, TraceICs, false, \ | |
1104 "Trace inline cache changes") \ | |
1105 \ | |
1106 notproduct(bool, TraceInvocationCounterOverflow, false, \ | |
1107 "Trace method invocation counter overflow") \ | |
1108 \ | |
1109 develop(bool, TraceInlineCacheClearing, false, \ | |
1110 "Trace clearing of inline caches in nmethods") \ | |
1111 \ | |
1112 develop(bool, TraceDependencies, false, \ | |
1113 "Trace dependencies") \ | |
1114 \ | |
1115 develop(bool, VerifyDependencies, trueInDebug, \ | |
1116 "Exercise and verify the compilation dependency mechanism") \ | |
1117 \ | |
1118 develop(bool, TraceNewOopMapGeneration, false, \ | |
1119 "Trace OopMapGeneration") \ | |
1120 \ | |
1121 develop(bool, TraceNewOopMapGenerationDetailed, false, \ | |
1122 "Trace OopMapGeneration: print detailed cell states") \ | |
1123 \ | |
1124 develop(bool, TimeOopMap, false, \ | |
1125 "Time calls to GenerateOopMap::compute_map() in sum") \ | |
1126 \ | |
1127 develop(bool, TimeOopMap2, false, \ | |
1128 "Time calls to GenerateOopMap::compute_map() individually") \ | |
1129 \ | |
1130 develop(bool, TraceMonitorMismatch, false, \ | |
1131 "Trace monitor matching failures during OopMapGeneration") \ | |
1132 \ | |
1133 develop(bool, TraceOopMapRewrites, false, \ | |
1134 "Trace rewritting of method oops during oop map generation") \ | |
1135 \ | |
1136 develop(bool, TraceSafepoint, false, \ | |
1137 "Trace safepoint operations") \ | |
1138 \ | |
1139 develop(bool, TraceICBuffer, false, \ | |
1140 "Trace usage of IC buffer") \ | |
1141 \ | |
1142 develop(bool, TraceCompiledIC, false, \ | |
1143 "Trace changes of compiled IC") \ | |
1144 \ | |
1145 notproduct(bool, TraceZapDeadLocals, false, \ | |
1146 "Trace zapping dead locals") \ | |
1147 \ | |
1148 develop(bool, TraceStartupTime, false, \ | |
1149 "Trace setup time") \ | |
1150 \ | |
1151 develop(bool, TraceHPI, false, \ | |
1152 "Trace Host Porting Interface (HPI)") \ | |
1153 \ | |
1154 product(ccstr, HPILibPath, NULL, \ | |
1155 "Specify alternate path to HPI library") \ | |
1156 \ | |
1157 develop(bool, TraceProtectionDomainVerification, false, \ | |
1158 "Trace protection domain verifcation") \ | |
1159 \ | |
1160 develop(bool, TraceClearedExceptions, false, \ | |
1161 "Prints when an exception is forcibly cleared") \ | |
1162 \ | |
1163 product(bool, TraceClassResolution, false, \ | |
1164 "Trace all constant pool resolutions (for debugging)") \ | |
1165 \ | |
1166 product(bool, TraceBiasedLocking, false, \ | |
1167 "Trace biased locking in JVM") \ | |
1168 \ | |
1169 product(bool, TraceMonitorInflation, false, \ | |
1170 "Trace monitor inflation in JVM") \ | |
1171 \ | |
1172 /* assembler */ \ | |
1173 product(bool, Use486InstrsOnly, false, \ | |
1174 "Use 80486 Compliant instruction subset") \ | |
1175 \ | |
1176 /* gc */ \ | |
1177 \ | |
1178 product(bool, UseSerialGC, false, \ | |
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1179 "Use the serial garbage collector") \ |
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1180 \ |
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1181 experimental(bool, UseG1GC, false, \ |
342
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1182 "Use the Garbage-First garbage collector") \ |
0 | 1183 \ |
1184 product(bool, UseParallelGC, false, \ | |
1185 "Use the Parallel Scavenge garbage collector") \ | |
1186 \ | |
1187 product(bool, UseParallelOldGC, false, \ | |
1188 "Use the Parallel Old garbage collector") \ | |
1189 \ | |
1190 product(bool, UseParallelOldGCCompacting, true, \ | |
1191 "In the Parallel Old garbage collector use parallel compaction") \ | |
1192 \ | |
1193 product(bool, UseParallelDensePrefixUpdate, true, \ | |
1194 "In the Parallel Old garbage collector use parallel dense" \ | |
1195 " prefix update") \ | |
1196 \ | |
1197 product(uintx, HeapMaximumCompactionInterval, 20, \ | |
1198 "How often should we maximally compact the heap (not allowing " \ | |
1199 "any dead space)") \ | |
1200 \ | |
1201 product(uintx, HeapFirstMaximumCompactionCount, 3, \ | |
1202 "The collection count for the first maximum compaction") \ | |
1203 \ | |
1204 product(bool, UseMaximumCompactionOnSystemGC, true, \ | |
1205 "In the Parallel Old garbage collector maximum compaction for " \ | |
1206 "a system GC") \ | |
1207 \ | |
1208 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ | |
1209 "The mean used by the par compact dead wood" \ | |
1210 "limiter (a number between 0-100).") \ | |
1211 \ | |
1212 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ | |
1213 "The standard deviation used by the par compact dead wood" \ | |
1214 "limiter (a number between 0-100).") \ | |
1215 \ | |
1216 product(bool, UseParallelOldGCDensePrefix, true, \ | |
1217 "Use a dense prefix with the Parallel Old garbage collector") \ | |
1218 \ | |
1219 product(uintx, ParallelGCThreads, 0, \ | |
1220 "Number of parallel threads parallel gc will use") \ | |
1221 \ | |
1222 product(uintx, ParallelCMSThreads, 0, \ | |
1223 "Max number of threads CMS will use for concurrent work") \ | |
1224 \ | |
483
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1225 develop(bool, ParallelOldGCSplitALot, false, \ |
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1226 "Provoke splitting (copying data from a young gen space to" \ |
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|
1227 "multiple destination spaces)") \ |
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1228 \ |
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1229 develop(uintx, ParallelOldGCSplitInterval, 3, \ |
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1230 "How often to provoke splitting a young gen space") \ |
0 | 1231 \ |
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1232 develop(bool, TraceRegionTasksQueuing, false, \ |
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1233 "Trace the queuing of the region tasks") \ |
0 | 1234 \ |
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1235 product(uintx, ParallelMarkingThreads, 0, \ |
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1236 "Number of marking threads concurrent gc will use") \ |
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1237 \ |
0 | 1238 product(uintx, YoungPLABSize, 4096, \ |
1239 "Size of young gen promotion labs (in HeapWords)") \ | |
1240 \ | |
1241 product(uintx, OldPLABSize, 1024, \ | |
1242 "Size of old gen promotion labs (in HeapWords)") \ | |
1243 \ | |
1244 product(uintx, GCTaskTimeStampEntries, 200, \ | |
1245 "Number of time stamp entries per gc worker thread") \ | |
1246 \ | |
1247 product(bool, AlwaysTenure, false, \ | |
1248 "Always tenure objects in eden. (ParallelGC only)") \ | |
1249 \ | |
1250 product(bool, NeverTenure, false, \ | |
1251 "Never tenure objects in eden, May tenure on overflow" \ | |
1252 " (ParallelGC only)") \ | |
1253 \ | |
1254 product(bool, ScavengeBeforeFullGC, true, \ | |
1255 "Scavenge youngest generation before each full GC," \ | |
1256 " used with UseParallelGC") \ | |
1257 \ | |
1258 develop(bool, ScavengeWithObjectsInToSpace, false, \ | |
1259 "Allow scavenges to occur when to_space contains objects.") \ | |
1260 \ | |
1261 product(bool, UseConcMarkSweepGC, false, \ | |
1262 "Use Concurrent Mark-Sweep GC in the old generation") \ | |
1263 \ | |
1264 product(bool, ExplicitGCInvokesConcurrent, false, \ | |
1265 "A System.gc() request invokes a concurrent collection;" \ | |
1266 " (effective only when UseConcMarkSweepGC)") \ | |
1267 \ | |
1268 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ | |
1269 "A System.gc() request invokes a concurrent collection and" \ | |
1270 " also unloads classes during such a concurrent gc cycle " \ | |
1271 " (effective only when UseConcMarkSweepGC)") \ | |
1272 \ | |
1273 develop(bool, UseCMSAdaptiveFreeLists, true, \ | |
1274 "Use Adaptive Free Lists in the CMS generation") \ | |
1275 \ | |
1276 develop(bool, UseAsyncConcMarkSweepGC, true, \ | |
1277 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ | |
1278 \ | |
1279 develop(bool, RotateCMSCollectionTypes, false, \ | |
1280 "Rotate the CMS collections among concurrent and STW") \ | |
1281 \ | |
1282 product(bool, UseCMSBestFit, true, \ | |
1283 "Use CMS best fit allocation strategy") \ | |
1284 \ | |
1285 product(bool, UseCMSCollectionPassing, true, \ | |
1286 "Use passing of collection from background to foreground") \ | |
1287 \ | |
1288 product(bool, UseParNewGC, false, \ | |
1289 "Use parallel threads in the new generation.") \ | |
1290 \ | |
1291 product(bool, ParallelGCVerbose, false, \ | |
1292 "Verbose output for parallel GC.") \ | |
1293 \ | |
1294 product(intx, ParallelGCBufferWastePct, 10, \ | |
1295 "wasted fraction of parallel allocation buffer.") \ | |
1296 \ | |
1297 product(bool, ParallelGCRetainPLAB, true, \ | |
1298 "Retain parallel allocation buffers across scavenges.") \ | |
1299 \ | |
1300 product(intx, TargetPLABWastePct, 10, \ | |
1301 "target wasted space in last buffer as pct of overall allocation")\ | |
1302 \ | |
1303 product(uintx, PLABWeight, 75, \ | |
1304 "Percentage (0-100) used to weight the current sample when" \ | |
1305 "computing exponentially decaying average for ResizePLAB.") \ | |
1306 \ | |
1307 product(bool, ResizePLAB, true, \ | |
1308 "Dynamically resize (survivor space) promotion labs") \ | |
1309 \ | |
1310 product(bool, PrintPLAB, false, \ | |
1311 "Print (survivor space) promotion labs sizing decisions") \ | |
1312 \ | |
1313 product(intx, ParGCArrayScanChunk, 50, \ | |
1314 "Scan a subset and push remainder, if array is bigger than this") \ | |
1315 \ | |
534 | 1316 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ |
1317 "Whether we should simulate work queue overflow in ParNew") \ | |
1318 \ | |
1319 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ | |
1320 "An `interval' counter that determines how frequently" \ | |
1321 " we simulate overflow; a smaller number increases frequency") \ | |
1322 \ | |
1323 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ | |
0 | 1324 "The desired number of objects to claim from the overflow list") \ |
1325 \ | |
1326 product(uintx, CMSParPromoteBlocksToClaim, 50, \ | |
1327 "Number of blocks to attempt to claim when refilling CMS LAB for "\ | |
1328 "parallel GC.") \ | |
1329 \ | |
1330 product(bool, AlwaysPreTouch, false, \ | |
1331 "It forces all freshly committed pages to be pre-touched.") \ | |
1332 \ | |
1333 product(bool, CMSUseOldDefaults, false, \ | |
1334 "A flag temporarily introduced to allow reverting to some older" \ | |
1335 "default settings; older as of 6.0 ") \ | |
1336 \ | |
1337 product(intx, CMSYoungGenPerWorker, 16*M, \ | |
1338 "The amount of young gen chosen by default per GC worker " \ | |
1339 "thread available ") \ | |
1340 \ | |
342
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1341 product(bool, GCOverheadReporting, false, \ |
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1342 "Enables the GC overhead reporting facility") \ |
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1343 \ |
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1344 product(intx, GCOverheadReportingPeriodMS, 100, \ |
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1345 "Reporting period for conc GC overhead reporting, in ms ") \ |
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1346 \ |
0 | 1347 product(bool, CMSIncrementalMode, false, \ |
1348 "Whether CMS GC should operate in \"incremental\" mode") \ | |
1349 \ | |
1350 product(uintx, CMSIncrementalDutyCycle, 10, \ | |
1351 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ | |
1352 "CMSIncrementalPacing is enabled, then this is just the initial" \ | |
1353 "value") \ | |
1354 \ | |
1355 product(bool, CMSIncrementalPacing, true, \ | |
1356 "Whether the CMS incremental mode duty cycle should be " \ | |
1357 "automatically adjusted") \ | |
1358 \ | |
1359 product(uintx, CMSIncrementalDutyCycleMin, 0, \ | |
1360 "Lower bound on the duty cycle when CMSIncrementalPacing is" \ | |
1361 "enabled (a percentage, 0-100).") \ | |
1362 \ | |
1363 product(uintx, CMSIncrementalSafetyFactor, 10, \ | |
1364 "Percentage (0-100) used to add conservatism when computing the" \ | |
1365 "duty cycle.") \ | |
1366 \ | |
1367 product(uintx, CMSIncrementalOffset, 0, \ | |
1368 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ | |
1369 "is shifted to the right within the period between young GCs") \ | |
1370 \ | |
1371 product(uintx, CMSExpAvgFactor, 25, \ | |
1372 "Percentage (0-100) used to weight the current sample when" \ | |
1373 "computing exponential averages for CMS statistics.") \ | |
1374 \ | |
1375 product(uintx, CMS_FLSWeight, 50, \ | |
1376 "Percentage (0-100) used to weight the current sample when" \ | |
1377 "computing exponentially decating averages for CMS FLS statistics.") \ | |
1378 \ | |
1379 product(uintx, CMS_FLSPadding, 2, \ | |
1380 "The multiple of deviation from mean to use for buffering" \ | |
1381 "against volatility in free list demand.") \ | |
1382 \ | |
1383 product(uintx, FLSCoalescePolicy, 2, \ | |
1384 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ | |
1385 \ | |
1386 product(uintx, CMS_SweepWeight, 50, \ | |
1387 "Percentage (0-100) used to weight the current sample when" \ | |
1388 "computing exponentially decaying average for inter-sweep duration.") \ | |
1389 \ | |
1390 product(uintx, CMS_SweepPadding, 2, \ | |
1391 "The multiple of deviation from mean to use for buffering" \ | |
1392 "against volatility in inter-sweep duration.") \ | |
1393 \ | |
1394 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ | |
1395 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ | |
1396 " duration exceeds this threhold in milliseconds") \ | |
1397 \ | |
1398 develop(bool, CMSTraceIncrementalMode, false, \ | |
1399 "Trace CMS incremental mode") \ | |
1400 \ | |
1401 develop(bool, CMSTraceIncrementalPacing, false, \ | |
1402 "Trace CMS incremental mode pacing computation") \ | |
1403 \ | |
1404 develop(bool, CMSTraceThreadState, false, \ | |
1405 "Trace the CMS thread state (enable the trace_state() method)") \ | |
1406 \ | |
1407 product(bool, CMSClassUnloadingEnabled, false, \ | |
1408 "Whether class unloading enabled when using CMS GC") \ | |
1409 \ | |
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1410 product(uintx, CMSClassUnloadingMaxInterval, 0, \ |
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1411 "When CMS class unloading is enabled, the maximum CMS cycle count"\ |
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1412 " for which classes may not be unloaded") \ |
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1413 \ |
0 | 1414 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ |
1415 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ | |
1416 \ | |
1417 product(bool, UseCMSCompactAtFullCollection, true, \ | |
1418 "Use mark sweep compact at full collections") \ | |
1419 \ | |
1420 product(uintx, CMSFullGCsBeforeCompaction, 0, \ | |
1421 "Number of CMS full collection done before compaction if > 0") \ | |
1422 \ | |
1423 develop(intx, CMSDictionaryChoice, 0, \ | |
1424 "Use BinaryTreeDictionary as default in the CMS generation") \ | |
1425 \ | |
1426 product(uintx, CMSIndexedFreeListReplenish, 4, \ | |
1427 "Replenish and indexed free list with this number of chunks") \ | |
1428 \ | |
1429 product(bool, CMSLoopWarn, false, \ | |
1430 "Warn in case of excessive CMS looping") \ | |
1431 \ | |
1432 develop(bool, CMSOverflowEarlyRestoration, false, \ | |
1433 "Whether preserved marks should be restored early") \ | |
1434 \ | |
541
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1435 product(uintx, CMSMarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ |
0 | 1436 "Size of CMS marking stack") \ |
1437 \ | |
541
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1438 product(uintx, CMSMarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ |
0 | 1439 "Max size of CMS marking stack") \ |
1440 \ | |
1441 notproduct(bool, CMSMarkStackOverflowALot, false, \ | |
1442 "Whether we should simulate frequent marking stack / work queue" \ | |
1443 " overflow") \ | |
1444 \ | |
534 | 1445 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ |
1446 "An `interval' counter that determines how frequently" \ | |
0 | 1447 " we simulate overflow; a smaller number increases frequency") \ |
1448 \ | |
1449 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ | |
1450 "(Temporary, subject to experimentation)" \ | |
1451 "Maximum number of abortable preclean iterations, if > 0") \ | |
1452 \ | |
1453 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ | |
1454 "(Temporary, subject to experimentation)" \ | |
1455 "Maximum time in abortable preclean in ms") \ | |
1456 \ | |
1457 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ | |
1458 "(Temporary, subject to experimentation)" \ | |
1459 "Nominal minimum work per abortable preclean iteration") \ | |
1460 \ | |
1461 product(intx, CMSAbortablePrecleanWaitMillis, 100, \ | |
1462 "(Temporary, subject to experimentation)" \ | |
1463 " Time that we sleep between iterations when not given" \ | |
1464 " enough work per iteration") \ | |
1465 \ | |
1466 product(uintx, CMSRescanMultiple, 32, \ | |
1467 "Size (in cards) of CMS parallel rescan task") \ | |
1468 \ | |
1469 product(uintx, CMSConcMarkMultiple, 32, \ | |
1470 "Size (in cards) of CMS concurrent MT marking task") \ | |
1471 \ | |
1472 product(uintx, CMSRevisitStackSize, 1*M, \ | |
1473 "Size of CMS KlassKlass revisit stack") \ | |
1474 \ | |
1475 product(bool, CMSAbortSemantics, false, \ | |
1476 "Whether abort-on-overflow semantics is implemented") \ | |
1477 \ | |
1478 product(bool, CMSParallelRemarkEnabled, true, \ | |
1479 "Whether parallel remark enabled (only if ParNewGC)") \ | |
1480 \ | |
1481 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ | |
1482 "Whether parallel remark of survivor space" \ | |
1483 " enabled (effective only if CMSParallelRemarkEnabled)") \ | |
1484 \ | |
1485 product(bool, CMSPLABRecordAlways, true, \ | |
1486 "Whether to always record survivor space PLAB bdries" \ | |
1487 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ | |
1488 \ | |
1489 product(bool, CMSConcurrentMTEnabled, true, \ | |
1490 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ | |
1491 \ | |
1492 product(bool, CMSPermGenPrecleaningEnabled, true, \ | |
1493 "Whether concurrent precleaning enabled in perm gen" \ | |
1494 " (effective only when CMSPrecleaningEnabled is true)") \ | |
1495 \ | |
1496 product(bool, CMSPrecleaningEnabled, true, \ | |
1497 "Whether concurrent precleaning enabled") \ | |
1498 \ | |
1499 product(uintx, CMSPrecleanIter, 3, \ | |
1500 "Maximum number of precleaning iteration passes") \ | |
1501 \ | |
1502 product(uintx, CMSPrecleanNumerator, 2, \ | |
1503 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ | |
1504 " ratio") \ | |
1505 \ | |
1506 product(uintx, CMSPrecleanDenominator, 3, \ | |
1507 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ | |
1508 " ratio") \ | |
1509 \ | |
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1510 product(bool, CMSPrecleanRefLists1, true, \ |
0 | 1511 "Preclean ref lists during (initial) preclean phase") \ |
1512 \ | |
1513 product(bool, CMSPrecleanRefLists2, false, \ | |
1514 "Preclean ref lists during abortable preclean phase") \ | |
1515 \ | |
1516 product(bool, CMSPrecleanSurvivors1, false, \ | |
1517 "Preclean survivors during (initial) preclean phase") \ | |
1518 \ | |
1519 product(bool, CMSPrecleanSurvivors2, true, \ | |
1520 "Preclean survivors during abortable preclean phase") \ | |
1521 \ | |
1522 product(uintx, CMSPrecleanThreshold, 1000, \ | |
1523 "Don't re-iterate if #dirty cards less than this") \ | |
1524 \ | |
1525 product(bool, CMSCleanOnEnter, true, \ | |
1526 "Clean-on-enter optimization for reducing number of dirty cards") \ | |
1527 \ | |
1528 product(uintx, CMSRemarkVerifyVariant, 1, \ | |
1529 "Choose variant (1,2) of verification following remark") \ | |
1530 \ | |
1531 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ | |
1532 "If Eden used is below this value, don't try to schedule remark") \ | |
1533 \ | |
1534 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ | |
1535 "The Eden occupancy % at which to try and schedule remark pause") \ | |
1536 \ | |
1537 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ | |
1538 "Start sampling Eden top at least before yg occupancy reaches" \ | |
1539 " 1/<ratio> of the size at which we plan to schedule remark") \ | |
1540 \ | |
1541 product(uintx, CMSSamplingGrain, 16*K, \ | |
1542 "The minimum distance between eden samples for CMS (see above)") \ | |
1543 \ | |
1544 product(bool, CMSScavengeBeforeRemark, false, \ | |
1545 "Attempt scavenge before the CMS remark step") \ | |
1546 \ | |
1547 develop(bool, CMSTraceSweeper, false, \ | |
1548 "Trace some actions of the CMS sweeper") \ | |
1549 \ | |
1550 product(uintx, CMSWorkQueueDrainThreshold, 10, \ | |
1551 "Don't drain below this size per parallel worker/thief") \ | |
1552 \ | |
1553 product(intx, CMSWaitDuration, 2000, \ | |
1554 "Time in milliseconds that CMS thread waits for young GC") \ | |
1555 \ | |
1556 product(bool, CMSYield, true, \ | |
1557 "Yield between steps of concurrent mark & sweep") \ | |
1558 \ | |
1559 product(uintx, CMSBitMapYieldQuantum, 10*M, \ | |
1560 "Bitmap operations should process at most this many bits" \ | |
1561 "between yields") \ | |
1562 \ | |
1563 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ | |
1564 "Verify that all refs across the FLS boundary " \ | |
1565 " are to valid objects") \ | |
1566 \ | |
1567 diagnostic(bool, FLSVerifyLists, false, \ | |
1568 "Do lots of (expensive) FreeListSpace verification") \ | |
1569 \ | |
1570 diagnostic(bool, FLSVerifyIndexTable, false, \ | |
1571 "Do lots of (expensive) FLS index table verification") \ | |
1572 \ | |
1573 develop(bool, FLSVerifyDictionary, false, \ | |
1574 "Do lots of (expensive) FLS dictionary verification") \ | |
1575 \ | |
1576 develop(bool, VerifyBlockOffsetArray, false, \ | |
1577 "Do (expensive!) block offset array verification") \ | |
1578 \ | |
1579 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ | |
1580 "Maintain _unallocated_block in BlockOffsetArray" \ | |
1581 " (currently applicable only to CMS collector)") \ | |
1582 \ | |
1583 develop(bool, TraceCMSState, false, \ | |
1584 "Trace the state of the CMS collection") \ | |
1585 \ | |
1586 product(intx, RefDiscoveryPolicy, 0, \ | |
1587 "Whether reference-based(0) or referent-based(1)") \ | |
1588 \ | |
1589 product(bool, ParallelRefProcEnabled, false, \ | |
1590 "Enable parallel reference processing whenever possible") \ | |
1591 \ | |
1592 product(bool, ParallelRefProcBalancingEnabled, true, \ | |
1593 "Enable balancing of reference processing queues") \ | |
1594 \ | |
1595 product(intx, CMSTriggerRatio, 80, \ | |
1596 "Percentage of MinHeapFreeRatio in CMS generation that is " \ | |
1597 " allocated before a CMS collection cycle commences") \ | |
1598 \ | |
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1599 product(intx, CMSTriggerPermRatio, 80, \ |
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1600 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \ |
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1601 " is allocated before a CMS collection cycle commences, that " \ |
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|
1602 " also collects the perm generation") \ |
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|
1603 \ |
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1604 product(uintx, CMSBootstrapOccupancy, 50, \ |
0 | 1605 "Percentage CMS generation occupancy at which to " \ |
1606 " initiate CMS collection for bootstrapping collection stats") \ | |
1607 \ | |
1608 product(intx, CMSInitiatingOccupancyFraction, -1, \ | |
1609 "Percentage CMS generation occupancy to start a CMS collection " \ | |
94
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1610 " cycle (A negative value means that CMSTriggerRatio is used)") \ |
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1611 \ |
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1612 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ |
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1613 "Percentage CMS perm generation occupancy to start a CMScollection"\ |
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1614 " cycle (A negative value means that CMSTriggerPermRatio is used)")\ |
0 | 1615 \ |
1616 product(bool, UseCMSInitiatingOccupancyOnly, false, \ | |
1617 "Only use occupancy as a crierion for starting a CMS collection") \ | |
1618 \ | |
94
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1619 product(intx, CMSIsTooFullPercentage, 98, \ |
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1620 "An absolute ceiling above which CMS will always consider the" \ |
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1621 " perm gen ripe for collection") \ |
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1622 \ |
0 | 1623 develop(bool, CMSTestInFreeList, false, \ |
1624 "Check if the coalesced range is already in the " \ | |
1625 "free lists as claimed.") \ | |
1626 \ | |
1627 notproduct(bool, CMSVerifyReturnedBytes, false, \ | |
1628 "Check that all the garbage collected was returned to the " \ | |
1629 "free lists.") \ | |
1630 \ | |
1631 notproduct(bool, ScavengeALot, false, \ | |
1632 "Force scavenge at every Nth exit from the runtime system " \ | |
1633 "(N=ScavengeALotInterval)") \ | |
1634 \ | |
1635 develop(bool, FullGCALot, false, \ | |
1636 "Force full gc at every Nth exit from the runtime system " \ | |
1637 "(N=FullGCALotInterval)") \ | |
1638 \ | |
1639 notproduct(bool, GCALotAtAllSafepoints, false, \ | |
1640 "Enforce ScavengeALot/GCALot at all potential safepoints") \ | |
1641 \ | |
1642 product(bool, HandlePromotionFailure, true, \ | |
1643 "The youngest generation collection does not require" \ | |
1644 " a guarantee of full promotion of all live objects.") \ | |
1645 \ | |
1646 notproduct(bool, PromotionFailureALot, false, \ | |
1647 "Use promotion failure handling on every youngest generation " \ | |
1648 "collection") \ | |
1649 \ | |
1650 develop(uintx, PromotionFailureALotCount, 1000, \ | |
1651 "Number of promotion failures occurring at ParGCAllocBuffer" \ | |
1652 "refill attempts (ParNew) or promotion attempts " \ | |
1653 "(other young collectors) ") \ | |
1654 \ | |
1655 develop(uintx, PromotionFailureALotInterval, 5, \ | |
1656 "Total collections between promotion failures alot") \ | |
1657 \ | |
1658 develop(intx, WorkStealingSleepMillis, 1, \ | |
1659 "Sleep time when sleep is used for yields") \ | |
1660 \ | |
1661 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ | |
1662 "Number of yields before a sleep is done during workstealing") \ | |
1663 \ | |
546
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1664 develop(uintx, WorkStealingHardSpins, 4096, \ |
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1665 "Number of iterations in a spin loop between checks on " \ |
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1666 "time out of hard spin") \ |
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|
1667 \ |
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1668 develop(uintx, WorkStealingSpinToYieldRatio, 10, \ |
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1669 "Ratio of hard spins to calls to yield") \ |
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1670 \ |
534 | 1671 product(uintx, PreserveMarkStackSize, 1024, \ |
0 | 1672 "Size for stack used in promotion failure handling") \ |
1673 \ | |
1674 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ | |
1675 \ | |
1676 product_pd(bool, ResizeTLAB, \ | |
1677 "Dynamically resize tlab size for threads") \ | |
1678 \ | |
1679 product(bool, ZeroTLAB, false, \ | |
1680 "Zero out the newly created TLAB") \ | |
1681 \ | |
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1682 product(bool, FastTLABRefill, true, \ |
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1683 "Use fast TLAB refill code") \ |
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1684 \ |
0 | 1685 product(bool, PrintTLAB, false, \ |
1686 "Print various TLAB related information") \ | |
1687 \ | |
1688 product(bool, TLABStats, true, \ | |
1689 "Print various TLAB related information") \ | |
1690 \ | |
1691 product_pd(bool, NeverActAsServerClassMachine, \ | |
1692 "Never act like a server-class machine") \ | |
1693 \ | |
1694 product(bool, AlwaysActAsServerClassMachine, false, \ | |
1695 "Always act like a server-class machine") \ | |
1696 \ | |
1697 product_pd(uintx, DefaultMaxRAM, \ | |
1698 "Maximum real memory size for setting server class heap size") \ | |
1699 \ | |
1700 product(uintx, DefaultMaxRAMFraction, 4, \ | |
1701 "Fraction (1/n) of real memory used for server class max heap") \ | |
1702 \ | |
1703 product(uintx, DefaultInitialRAMFraction, 64, \ | |
1704 "Fraction (1/n) of real memory used for server class initial heap") \ | |
1705 \ | |
1706 product(bool, UseAutoGCSelectPolicy, false, \ | |
1707 "Use automatic collection selection policy") \ | |
1708 \ | |
1709 product(uintx, AutoGCSelectPauseMillis, 5000, \ | |
1710 "Automatic GC selection pause threshhold in ms") \ | |
1711 \ | |
1712 product(bool, UseAdaptiveSizePolicy, true, \ | |
1713 "Use adaptive generation sizing policies") \ | |
1714 \ | |
1715 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ | |
1716 "Use adaptive survivor sizing policies") \ | |
1717 \ | |
1718 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ | |
1719 "Use adaptive young-old sizing policies at minor collections") \ | |
1720 \ | |
1721 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ | |
1722 "Use adaptive young-old sizing policies at major collections") \ | |
1723 \ | |
1724 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ | |
1725 "Use statistics from System.GC for adaptive size policy") \ | |
1726 \ | |
1727 product(bool, UseAdaptiveGCBoundary, false, \ | |
1728 "Allow young-old boundary to move") \ | |
1729 \ | |
1730 develop(bool, TraceAdaptiveGCBoundary, false, \ | |
1731 "Trace young-old boundary moves") \ | |
1732 \ | |
1733 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ | |
1734 "Resize the virtual spaces of the young or old generations") \ | |
1735 \ | |
1736 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ | |
1737 "Policy for changeing generation size for throughput goals") \ | |
1738 \ | |
1739 product(uintx, AdaptiveSizePausePolicy, 0, \ | |
1740 "Policy for changing generation size for pause goals") \ | |
1741 \ | |
1742 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ | |
1743 "Adjust tenured generation to achive a minor pause goal") \ | |
1744 \ | |
1745 develop(bool, PSAdjustYoungGenForMajorPause, false, \ | |
1746 "Adjust young generation to achive a major pause goal") \ | |
1747 \ | |
1748 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ | |
1749 "Number of steps where heuristics is used before data is used") \ | |
1750 \ | |
1751 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ | |
1752 "Number of collections before the adaptive sizing is started") \ | |
1753 \ | |
1754 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ | |
1755 "Collecton interval for printing information, zero => never") \ | |
1756 \ | |
1757 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ | |
1758 "Use adaptive minimum footprint as a goal") \ | |
1759 \ | |
1760 product(uintx, AdaptiveSizePolicyWeight, 10, \ | |
1761 "Weight given to exponential resizing, between 0 and 100") \ | |
1762 \ | |
1763 product(uintx, AdaptiveTimeWeight, 25, \ | |
1764 "Weight given to time in adaptive policy, between 0 and 100") \ | |
1765 \ | |
1766 product(uintx, PausePadding, 1, \ | |
1767 "How much buffer to keep for pause time") \ | |
1768 \ | |
1769 product(uintx, PromotedPadding, 3, \ | |
1770 "How much buffer to keep for promotion failure") \ | |
1771 \ | |
1772 product(uintx, SurvivorPadding, 3, \ | |
1773 "How much buffer to keep for survivor overflow") \ | |
1774 \ | |
1775 product(uintx, AdaptivePermSizeWeight, 20, \ | |
1776 "Weight for perm gen exponential resizing, between 0 and 100") \ | |
1777 \ | |
1778 product(uintx, PermGenPadding, 3, \ | |
1779 "How much buffer to keep for perm gen sizing") \ | |
1780 \ | |
1781 product(uintx, ThresholdTolerance, 10, \ | |
1782 "Allowed collection cost difference between generations") \ | |
1783 \ | |
1784 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ | |
1785 "If collection costs are within margin, reduce both by full delta") \ | |
1786 \ | |
1787 product(uintx, YoungGenerationSizeIncrement, 20, \ | |
1788 "Adaptive size percentage change in young generation") \ | |
1789 \ | |
1790 product(uintx, YoungGenerationSizeSupplement, 80, \ | |
1791 "Supplement to YoungedGenerationSizeIncrement used at startup") \ | |
1792 \ | |
1793 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ | |
1794 "Decay factor to YoungedGenerationSizeSupplement") \ | |
1795 \ | |
1796 product(uintx, TenuredGenerationSizeIncrement, 20, \ | |
1797 "Adaptive size percentage change in tenured generation") \ | |
1798 \ | |
1799 product(uintx, TenuredGenerationSizeSupplement, 80, \ | |
1800 "Supplement to TenuredGenerationSizeIncrement used at startup") \ | |
1801 \ | |
1802 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ | |
1803 "Decay factor to TenuredGenerationSizeIncrement") \ | |
1804 \ | |
1805 product(uintx, MaxGCPauseMillis, max_uintx, \ | |
1806 "Adaptive size policy maximum GC pause time goal in msec") \ | |
1807 \ | |
1808 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ | |
1809 "Adaptive size policy maximum GC minor pause time goal in msec") \ | |
1810 \ | |
1811 product(uintx, GCTimeRatio, 99, \ | |
1812 "Adaptive size policy application time to GC time ratio") \ | |
1813 \ | |
1814 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ | |
1815 "Adaptive size scale down factor for shrinking") \ | |
1816 \ | |
1817 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ | |
1818 "Adaptive size decays the major cost for long major intervals") \ | |
1819 \ | |
1820 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ | |
1821 "Time scale over which major costs decay") \ | |
1822 \ | |
1823 product(uintx, MinSurvivorRatio, 3, \ | |
1824 "Minimum ratio of young generation/survivor space size") \ | |
1825 \ | |
1826 product(uintx, InitialSurvivorRatio, 8, \ | |
1827 "Initial ratio of eden/survivor space size") \ | |
1828 \ | |
1829 product(uintx, BaseFootPrintEstimate, 256*M, \ | |
1830 "Estimate of footprint other than Java Heap") \ | |
1831 \ | |
1832 product(bool, UseGCOverheadLimit, true, \ | |
1833 "Use policy to limit of proportion of time spent in GC " \ | |
1834 "before an OutOfMemory error is thrown") \ | |
1835 \ | |
1836 product(uintx, GCTimeLimit, 98, \ | |
1837 "Limit of proportion of time spent in GC before an OutOfMemory" \ | |
1838 "error is thrown (used with GCHeapFreeLimit)") \ | |
1839 \ | |
1840 product(uintx, GCHeapFreeLimit, 2, \ | |
1841 "Minimum percentage of free space after a full GC before an " \ | |
1842 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ | |
1843 \ | |
1844 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ | |
1845 "Number of consecutive collections before gc time limit fires") \ | |
1846 \ | |
1847 product(bool, PrintAdaptiveSizePolicy, false, \ | |
1848 "Print information about AdaptiveSizePolicy") \ | |
1849 \ | |
1850 product(intx, PrefetchCopyIntervalInBytes, -1, \ | |
1851 "How far ahead to prefetch destination area (<= 0 means off)") \ | |
1852 \ | |
1853 product(intx, PrefetchScanIntervalInBytes, -1, \ | |
1854 "How far ahead to prefetch scan area (<= 0 means off)") \ | |
1855 \ | |
1856 product(intx, PrefetchFieldsAhead, -1, \ | |
1857 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ | |
1858 \ | |
1859 develop(bool, UsePrefetchQueue, true, \ | |
1860 "Use the prefetch queue during PS promotion") \ | |
1861 \ | |
1862 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ | |
1863 "Verify system before exiting") \ | |
1864 \ | |
1865 diagnostic(bool, VerifyBeforeGC, false, \ | |
1866 "Verify memory system before GC") \ | |
1867 \ | |
1868 diagnostic(bool, VerifyAfterGC, false, \ | |
1869 "Verify memory system after GC") \ | |
1870 \ | |
1871 diagnostic(bool, VerifyDuringGC, false, \ | |
1872 "Verify memory system during GC (between phases)") \ | |
1873 \ | |
390 | 1874 diagnostic(bool, GCParallelVerificationEnabled, true, \ |
1875 "Enable parallel memory system verification") \ | |
1876 \ | |
0 | 1877 diagnostic(bool, VerifyRememberedSets, false, \ |
1878 "Verify GC remembered sets") \ | |
1879 \ | |
1880 diagnostic(bool, VerifyObjectStartArray, true, \ | |
1881 "Verify GC object start array if verify before/after") \ | |
1882 \ | |
1883 product(bool, DisableExplicitGC, false, \ | |
1884 "Tells whether calling System.gc() does a full GC") \ | |
1885 \ | |
1886 notproduct(bool, CheckMemoryInitialization, false, \ | |
1887 "Checks memory initialization") \ | |
1888 \ | |
1889 product(bool, CollectGen0First, false, \ | |
1890 "Collect youngest generation before each full GC") \ | |
1891 \ | |
1892 diagnostic(bool, BindCMSThreadToCPU, false, \ | |
1893 "Bind CMS Thread to CPU if possible") \ | |
1894 \ | |
1895 diagnostic(uintx, CPUForCMSThread, 0, \ | |
1896 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ | |
1897 \ | |
1898 product(bool, BindGCTaskThreadsToCPUs, false, \ | |
1899 "Bind GCTaskThreads to CPUs if possible") \ | |
1900 \ | |
1901 product(bool, UseGCTaskAffinity, false, \ | |
1902 "Use worker affinity when asking for GCTasks") \ | |
1903 \ | |
1904 product(uintx, ProcessDistributionStride, 4, \ | |
1905 "Stride through processors when distributing processes") \ | |
1906 \ | |
1907 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ | |
1908 "number of times the coordinator GC thread will sleep while " \ | |
1909 "yielding before giving up and resuming GC") \ | |
1910 \ | |
1911 product(uintx, CMSYieldSleepCount, 0, \ | |
1912 "number of times a GC thread (minus the coordinator) " \ | |
1913 "will sleep while yielding before giving up and resuming GC") \ | |
1914 \ | |
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1915 notproduct(bool, PrintFlagsFinal, false, \ |
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1916 "Print all command line flags after argument processing") \ |
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1917 \ |
0 | 1918 /* gc tracing */ \ |
1919 manageable(bool, PrintGC, false, \ | |
1920 "Print message at garbage collect") \ | |
1921 \ | |
1922 manageable(bool, PrintGCDetails, false, \ | |
1923 "Print more details at garbage collect") \ | |
1924 \ | |
1925 manageable(bool, PrintGCDateStamps, false, \ | |
1926 "Print date stamps at garbage collect") \ | |
1927 \ | |
1928 manageable(bool, PrintGCTimeStamps, false, \ | |
1929 "Print timestamps at garbage collect") \ | |
1930 \ | |
1931 product(bool, PrintGCTaskTimeStamps, false, \ | |
1932 "Print timestamps for individual gc worker thread tasks") \ | |
1933 \ | |
1934 develop(intx, ConcGCYieldTimeout, 0, \ | |
1935 "If non-zero, assert that GC threads yield within this # of ms.") \ | |
1936 \ | |
1937 notproduct(bool, TraceMarkSweep, false, \ | |
1938 "Trace mark sweep") \ | |
1939 \ | |
1940 product(bool, PrintReferenceGC, false, \ | |
1941 "Print times spent handling reference objects during GC " \ | |
1942 " (enabled only when PrintGCDetails)") \ | |
1943 \ | |
1944 develop(bool, TraceReferenceGC, false, \ | |
1945 "Trace handling of soft/weak/final/phantom references") \ | |
1946 \ | |
1947 develop(bool, TraceFinalizerRegistration, false, \ | |
1948 "Trace registration of final references") \ | |
1949 \ | |
1950 notproduct(bool, TraceScavenge, false, \ | |
1951 "Trace scavenge") \ | |
1952 \ | |
1953 product_rw(bool, TraceClassLoading, false, \ | |
1954 "Trace all classes loaded") \ | |
1955 \ | |
1956 product(bool, TraceClassLoadingPreorder, false, \ | |
1957 "Trace all classes loaded in order referenced (not loaded)") \ | |
1958 \ | |
1959 product_rw(bool, TraceClassUnloading, false, \ | |
1960 "Trace unloading of classes") \ | |
1961 \ | |
1962 product_rw(bool, TraceLoaderConstraints, false, \ | |
1963 "Trace loader constraints") \ | |
1964 \ | |
1965 product(bool, TraceGen0Time, false, \ | |
1966 "Trace accumulated time for Gen 0 collection") \ | |
1967 \ | |
1968 product(bool, TraceGen1Time, false, \ | |
1969 "Trace accumulated time for Gen 1 collection") \ | |
1970 \ | |
1971 product(bool, PrintTenuringDistribution, false, \ | |
1972 "Print tenuring age information") \ | |
1973 \ | |
1974 product_rw(bool, PrintHeapAtGC, false, \ | |
1975 "Print heap layout before and after each GC") \ | |
1976 \ | |
1977 product(bool, PrintHeapAtSIGBREAK, true, \ | |
1978 "Print heap layout in response to SIGBREAK") \ | |
1979 \ | |
615
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1980 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ |
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1981 "Print a class histogram before any major stop-world GC") \ |
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1982 \ |
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1983 manageable(bool, PrintClassHistogramAfterFullGC, false, \ |
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1984 "Print a class histogram after any major stop-world GC") \ |
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1985 \ |
0 | 1986 manageable(bool, PrintClassHistogram, false, \ |
1987 "Print a histogram of class instances") \ | |
1988 \ | |
1989 develop(bool, TraceWorkGang, false, \ | |
1990 "Trace activities of work gangs") \ | |
1991 \ | |
1992 product(bool, TraceParallelOldGCTasks, false, \ | |
1993 "Trace multithreaded GC activity") \ | |
1994 \ | |
1995 develop(bool, TraceBlockOffsetTable, false, \ | |
1996 "Print BlockOffsetTable maps") \ | |
1997 \ | |
1998 develop(bool, TraceCardTableModRefBS, false, \ | |
1999 "Print CardTableModRefBS maps") \ | |
2000 \ | |
2001 develop(bool, TraceGCTaskManager, false, \ | |
2002 "Trace actions of the GC task manager") \ | |
2003 \ | |
2004 develop(bool, TraceGCTaskQueue, false, \ | |
2005 "Trace actions of the GC task queues") \ | |
2006 \ | |
2007 develop(bool, TraceGCTaskThread, false, \ | |
2008 "Trace actions of the GC task threads") \ | |
2009 \ | |
2010 product(bool, PrintParallelOldGCPhaseTimes, false, \ | |
2011 "Print the time taken by each parallel old gc phase." \ | |
2012 "PrintGCDetails must also be enabled.") \ | |
2013 \ | |
2014 develop(bool, TraceParallelOldGCMarkingPhase, false, \ | |
2015 "Trace parallel old gc marking phase") \ | |
2016 \ | |
2017 develop(bool, TraceParallelOldGCSummaryPhase, false, \ | |
2018 "Trace parallel old gc summary phase") \ | |
2019 \ | |
2020 develop(bool, TraceParallelOldGCCompactionPhase, false, \ | |
2021 "Trace parallel old gc compaction phase") \ | |
2022 \ | |
2023 develop(bool, TraceParallelOldGCDensePrefix, false, \ | |
2024 "Trace parallel old gc dense prefix computation") \ | |
2025 \ | |
2026 develop(bool, IgnoreLibthreadGPFault, false, \ | |
2027 "Suppress workaround for libthread GP fault") \ | |
2028 \ | |
139
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2029 product(bool, PrintJNIGCStalls, false, \ |
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2030 "Print diagnostic message when GC is stalled" \ |
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2031 "by JNI critical section") \ |
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2032 \ |
0 | 2033 /* JVMTI heap profiling */ \ |
2034 \ | |
2035 diagnostic(bool, TraceJVMTIObjectTagging, false, \ | |
2036 "Trace JVMTI object tagging calls") \ | |
2037 \ | |
2038 diagnostic(bool, VerifyBeforeIteration, false, \ | |
2039 "Verify memory system before JVMTI iteration") \ | |
2040 \ | |
2041 /* compiler interface */ \ | |
2042 \ | |
2043 develop(bool, CIPrintCompilerName, false, \ | |
2044 "when CIPrint is active, print the name of the active compiler") \ | |
2045 \ | |
2046 develop(bool, CIPrintCompileQueue, false, \ | |
2047 "display the contents of the compile queue whenever a " \ | |
2048 "compilation is enqueued") \ | |
2049 \ | |
2050 develop(bool, CIPrintRequests, false, \ | |
2051 "display every request for compilation") \ | |
2052 \ | |
2053 product(bool, CITime, false, \ | |
2054 "collect timing information for compilation") \ | |
2055 \ | |
2056 develop(bool, CITimeEach, false, \ | |
2057 "display timing information after each successful compilation") \ | |
2058 \ | |
2059 develop(bool, CICountOSR, true, \ | |
2060 "use a separate counter when assigning ids to osr compilations") \ | |
2061 \ | |
2062 develop(bool, CICompileNatives, true, \ | |
2063 "compile native methods if supported by the compiler") \ | |
2064 \ | |
2065 develop_pd(bool, CICompileOSR, \ | |
2066 "compile on stack replacement methods if supported by the " \ | |
2067 "compiler") \ | |
2068 \ | |
2069 develop(bool, CIPrintMethodCodes, false, \ | |
2070 "print method bytecodes of the compiled code") \ | |
2071 \ | |
2072 develop(bool, CIPrintTypeFlow, false, \ | |
2073 "print the results of ciTypeFlow analysis") \ | |
2074 \ | |
2075 develop(bool, CITraceTypeFlow, false, \ | |
2076 "detailed per-bytecode tracing of ciTypeFlow analysis") \ | |
2077 \ | |
2078 develop(intx, CICloneLoopTestLimit, 100, \ | |
2079 "size limit for blocks heuristically cloned in ciTypeFlow") \ | |
2080 \ | |
2081 /* temp diagnostics */ \ | |
2082 \ | |
2083 diagnostic(bool, TraceRedundantCompiles, false, \ | |
2084 "Have compile broker print when a request already in the queue is"\ | |
2085 " requested again") \ | |
2086 \ | |
2087 diagnostic(bool, InitialCompileFast, false, \ | |
2088 "Initial compile at CompLevel_fast_compile") \ | |
2089 \ | |
2090 diagnostic(bool, InitialCompileReallyFast, false, \ | |
2091 "Initial compile at CompLevel_really_fast_compile (no profile)") \ | |
2092 \ | |
2093 diagnostic(bool, FullProfileOnReInterpret, true, \ | |
2094 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ | |
2095 \ | |
2096 /* compiler */ \ | |
2097 \ | |
2098 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ | |
2099 "Number of compiler threads to run") \ | |
2100 \ | |
2101 product(intx, CompilationPolicyChoice, 0, \ | |
2102 "which compilation policy (0/1)") \ | |
2103 \ | |
2104 develop(bool, UseStackBanging, true, \ | |
2105 "use stack banging for stack overflow checks (required for " \ | |
2106 "proper StackOverflow handling; disable only to measure cost " \ | |
2107 "of stackbanging)") \ | |
2108 \ | |
2109 develop(bool, Use24BitFPMode, true, \ | |
2110 "Set 24-bit FPU mode on a per-compile basis ") \ | |
2111 \ | |
2112 develop(bool, Use24BitFP, true, \ | |
2113 "use FP instructions that produce 24-bit precise results") \ | |
2114 \ | |
2115 develop(bool, UseStrictFP, true, \ | |
2116 "use strict fp if modifier strictfp is set") \ | |
2117 \ | |
2118 develop(bool, GenerateSynchronizationCode, true, \ | |
2119 "generate locking/unlocking code for synchronized methods and " \ | |
2120 "monitors") \ | |
2121 \ | |
2122 develop(bool, GenerateCompilerNullChecks, true, \ | |
2123 "Generate explicit null checks for loads/stores/calls") \ | |
2124 \ | |
2125 develop(bool, GenerateRangeChecks, true, \ | |
2126 "Generate range checks for array accesses") \ | |
2127 \ | |
2128 develop_pd(bool, ImplicitNullChecks, \ | |
2129 "generate code for implicit null checks") \ | |
2130 \ | |
2131 product(bool, PrintSafepointStatistics, false, \ | |
2132 "print statistics about safepoint synchronization") \ | |
2133 \ | |
2134 product(intx, PrintSafepointStatisticsCount, 300, \ | |
2135 "total number of safepoint statistics collected " \ | |
2136 "before printing them out") \ | |
2137 \ | |
2138 product(intx, PrintSafepointStatisticsTimeout, -1, \ | |
2139 "print safepoint statistics only when safepoint takes" \ | |
2140 " more than PrintSafepointSatisticsTimeout in millis") \ | |
2141 \ | |
2142 develop(bool, InlineAccessors, true, \ | |
2143 "inline accessor methods (get/set)") \ | |
2144 \ | |
2145 product(bool, Inline, true, \ | |
2146 "enable inlining") \ | |
2147 \ | |
2148 product(bool, ClipInlining, true, \ | |
2149 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ | |
2150 \ | |
2151 develop(bool, UseCHA, true, \ | |
2152 "enable CHA") \ | |
2153 \ | |
2154 product(bool, UseTypeProfile, true, \ | |
2155 "Check interpreter profile for historically monomorphic calls") \ | |
2156 \ | |
2157 product(intx, TypeProfileMajorReceiverPercent, 90, \ | |
2158 "% of major receiver type to all profiled receivers") \ | |
2159 \ | |
2160 notproduct(bool, TimeCompiler, false, \ | |
2161 "time the compiler") \ | |
2162 \ | |
2163 notproduct(bool, TimeCompiler2, false, \ | |
2164 "detailed time the compiler (requires +TimeCompiler)") \ | |
2165 \ | |
2166 diagnostic(bool, PrintInlining, false, \ | |
2167 "prints inlining optimizations") \ | |
2168 \ | |
2169 diagnostic(bool, PrintIntrinsics, false, \ | |
2170 "prints attempted and successful inlining of intrinsics") \ | |
2171 \ | |
2172 diagnostic(ccstrlist, DisableIntrinsic, "", \ | |
2173 "do not expand intrinsics whose (internal) names appear here") \ | |
2174 \ | |
2175 develop(bool, StressReflectiveCode, false, \ | |
2176 "Use inexact types at allocations, etc., to test reflection") \ | |
2177 \ | |
2178 develop(bool, EagerInitialization, false, \ | |
2179 "Eagerly initialize classes if possible") \ | |
2180 \ | |
2181 product(bool, Tier1UpdateMethodData, trueInTiered, \ | |
2182 "Update methodDataOops in Tier1-generated code") \ | |
2183 \ | |
2184 develop(bool, TraceMethodReplacement, false, \ | |
2185 "Print when methods are replaced do to recompilation") \ | |
2186 \ | |
2187 develop(bool, PrintMethodFlushing, false, \ | |
2188 "print the nmethods being flushed") \ | |
2189 \ | |
2190 notproduct(bool, LogMultipleMutexLocking, false, \ | |
2191 "log locking and unlocking of mutexes (only if multiple locks " \ | |
2192 "are held)") \ | |
2193 \ | |
2194 develop(bool, UseRelocIndex, false, \ | |
2195 "use an index to speed random access to relocations") \ | |
2196 \ | |
2197 develop(bool, StressCodeBuffers, false, \ | |
2198 "Exercise code buffer expansion and other rare state changes") \ | |
2199 \ | |
2200 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ | |
2201 "Generate extra debugging info for non-safepoints in nmethods") \ | |
2202 \ | |
2203 diagnostic(bool, DebugInlinedCalls, true, \ | |
2204 "If false, restricts profiled locations to the root method only") \ | |
2205 \ | |
2206 product(bool, PrintVMOptions, trueInDebug, \ | |
2207 "print VM flag settings") \ | |
2208 \ | |
564 | 2209 product(bool, IgnoreUnrecognizedVMOptions, false, \ |
2210 "Ignore unrecognized VM options") \ | |
2211 \ | |
0 | 2212 diagnostic(bool, SerializeVMOutput, true, \ |
2213 "Use a mutex to serialize output to tty and hotspot.log") \ | |
2214 \ | |
2215 diagnostic(bool, DisplayVMOutput, true, \ | |
2216 "Display all VM output on the tty, independently of LogVMOutput") \ | |
2217 \ | |
2218 diagnostic(bool, LogVMOutput, trueInDebug, \ | |
2219 "Save VM output to hotspot.log, or to LogFile") \ | |
2220 \ | |
2221 diagnostic(ccstr, LogFile, NULL, \ | |
2222 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ | |
2223 \ | |
2224 product(ccstr, ErrorFile, NULL, \ | |
2225 "If an error occurs, save the error data to this file " \ | |
2226 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ | |
2227 \ | |
2228 product(bool, DisplayVMOutputToStderr, false, \ | |
2229 "If DisplayVMOutput is true, display all VM output to stderr") \ | |
2230 \ | |
2231 product(bool, DisplayVMOutputToStdout, false, \ | |
2232 "If DisplayVMOutput is true, display all VM output to stdout") \ | |
2233 \ | |
2234 product(bool, UseHeavyMonitors, false, \ | |
2235 "use heavyweight instead of lightweight Java monitors") \ | |
2236 \ | |
2237 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ | |
2238 "print histogram of the symbol table") \ | |
2239 \ | |
2240 notproduct(bool, ExitVMOnVerifyError, false, \ | |
2241 "standard exit from VM if bytecode verify error " \ | |
2242 "(only in debug mode)") \ | |
2243 \ | |
2244 notproduct(ccstr, AbortVMOnException, NULL, \ | |
2245 "Call fatal if this exception is thrown. Example: " \ | |
2246 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ | |
2247 \ | |
2248 develop(bool, DebugVtables, false, \ | |
2249 "add debugging code to vtable dispatch") \ | |
2250 \ | |
2251 develop(bool, PrintVtables, false, \ | |
2252 "print vtables when printing klass") \ | |
2253 \ | |
2254 notproduct(bool, PrintVtableStats, false, \ | |
2255 "print vtables stats at end of run") \ | |
2256 \ | |
2257 develop(bool, TraceCreateZombies, false, \ | |
2258 "trace creation of zombie nmethods") \ | |
2259 \ | |
2260 notproduct(bool, IgnoreLockingAssertions, false, \ | |
2261 "disable locking assertions (for speed)") \ | |
2262 \ | |
2263 notproduct(bool, VerifyLoopOptimizations, false, \ | |
2264 "verify major loop optimizations") \ | |
2265 \ | |
2266 product(bool, RangeCheckElimination, true, \ | |
2267 "Split loop iterations to eliminate range checks") \ | |
2268 \ | |
2269 develop_pd(bool, UncommonNullCast, \ | |
2270 "track occurrences of null in casts; adjust compiler tactics") \ | |
2271 \ | |
2272 develop(bool, TypeProfileCasts, true, \ | |
2273 "treat casts like calls for purposes of type profiling") \ | |
2274 \ | |
2275 develop(bool, MonomorphicArrayCheck, true, \ | |
2276 "Uncommon-trap array store checks that require full type check") \ | |
2277 \ | |
2278 develop(bool, DelayCompilationDuringStartup, true, \ | |
2279 "Delay invoking the compiler until main application class is " \ | |
2280 "loaded") \ | |
2281 \ | |
2282 develop(bool, CompileTheWorld, false, \ | |
2283 "Compile all methods in all classes in bootstrap class path " \ | |
2284 "(stress test)") \ | |
2285 \ | |
2286 develop(bool, CompileTheWorldPreloadClasses, true, \ | |
2287 "Preload all classes used by a class before start loading") \ | |
2288 \ | |
2289 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ | |
2290 "Compile all methods although class initializer failed") \ | |
2291 \ | |
2292 develop(bool, TraceIterativeGVN, false, \ | |
2293 "Print progress during Iterative Global Value Numbering") \ | |
2294 \ | |
2295 develop(bool, FillDelaySlots, true, \ | |
2296 "Fill delay slots (on SPARC only)") \ | |
2297 \ | |
2298 develop(bool, VerifyIterativeGVN, false, \ | |
2299 "Verify Def-Use modifications during sparse Iterative Global " \ | |
2300 "Value Numbering") \ | |
2301 \ | |
2302 notproduct(bool, TracePhaseCCP, false, \ | |
2303 "Print progress during Conditional Constant Propagation") \ | |
2304 \ | |
2305 develop(bool, TimeLivenessAnalysis, false, \ | |
2306 "Time computation of bytecode liveness analysis") \ | |
2307 \ | |
2308 develop(bool, TraceLivenessGen, false, \ | |
2309 "Trace the generation of liveness analysis information") \ | |
2310 \ | |
2311 notproduct(bool, TraceLivenessQuery, false, \ | |
2312 "Trace queries of liveness analysis information") \ | |
2313 \ | |
2314 notproduct(bool, CollectIndexSetStatistics, false, \ | |
2315 "Collect information about IndexSets") \ | |
2316 \ | |
2317 develop(bool, PrintDominators, false, \ | |
2318 "Print out dominator trees for GVN") \ | |
2319 \ | |
2320 develop(bool, UseLoopSafepoints, true, \ | |
2321 "Generate Safepoint nodes in every loop") \ | |
2322 \ | |
2323 notproduct(bool, TraceCISCSpill, false, \ | |
2324 "Trace allocators use of cisc spillable instructions") \ | |
2325 \ | |
2326 notproduct(bool, TraceSpilling, false, \ | |
2327 "Trace spilling") \ | |
2328 \ | |
2329 develop(bool, DeutschShiffmanExceptions, true, \ | |
2330 "Fast check to find exception handler for precisely typed " \ | |
2331 "exceptions") \ | |
2332 \ | |
2333 product(bool, SplitIfBlocks, true, \ | |
2334 "Clone compares and control flow through merge points to fold " \ | |
2335 "some branches") \ | |
2336 \ | |
2337 develop(intx, FastAllocateSizeLimit, 128*K, \ | |
2338 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ | |
2339 "Inline allocations larger than this in doublewords must go slow")\ | |
2340 \ | |
2341 product(bool, AggressiveOpts, false, \ | |
2342 "Enable aggressive optimizations - see arguments.cpp") \ | |
2343 \ | |
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2344 product(bool, UseStringCache, false, \ |
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2345 "Enable String cache capabilities on String.java") \ |
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2346 \ |
0 | 2347 /* statistics */ \ |
2348 develop(bool, UseVTune, false, \ | |
2349 "enable support for Intel's VTune profiler") \ | |
2350 \ | |
2351 develop(bool, CountCompiledCalls, false, \ | |
2352 "counts method invocations") \ | |
2353 \ | |
2354 notproduct(bool, CountRuntimeCalls, false, \ | |
2355 "counts VM runtime calls") \ | |
2356 \ | |
2357 develop(bool, CountJNICalls, false, \ | |
2358 "counts jni method invocations") \ | |
2359 \ | |
2360 notproduct(bool, CountJVMCalls, false, \ | |
2361 "counts jvm method invocations") \ | |
2362 \ | |
2363 notproduct(bool, CountRemovableExceptions, false, \ | |
2364 "count exceptions that could be replaced by branches due to " \ | |
2365 "inlining") \ | |
2366 \ | |
2367 notproduct(bool, ICMissHistogram, false, \ | |
2368 "produce histogram of IC misses") \ | |
2369 \ | |
2370 notproduct(bool, PrintClassStatistics, false, \ | |
2371 "prints class statistics at end of run") \ | |
2372 \ | |
2373 notproduct(bool, PrintMethodStatistics, false, \ | |
2374 "prints method statistics at end of run") \ | |
2375 \ | |
2376 /* interpreter */ \ | |
2377 develop(bool, ClearInterpreterLocals, false, \ | |
2378 "Always clear local variables of interpreter activations upon " \ | |
2379 "entry") \ | |
2380 \ | |
2381 product_pd(bool, RewriteBytecodes, \ | |
2382 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ | |
2383 \ | |
2384 product_pd(bool, RewriteFrequentPairs, \ | |
2385 "Rewrite frequently used bytecode pairs into a single bytecode") \ | |
2386 \ | |
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2387 diagnostic(bool, PrintInterpreter, false, \ |
0 | 2388 "Prints the generated interpreter code") \ |
2389 \ | |
2390 product(bool, UseInterpreter, true, \ | |
2391 "Use interpreter for non-compiled methods") \ | |
2392 \ | |
2393 develop(bool, UseFastSignatureHandlers, true, \ | |
2394 "Use fast signature handlers for native calls") \ | |
2395 \ | |
2396 develop(bool, UseV8InstrsOnly, false, \ | |
2397 "Use SPARC-V8 Compliant instruction subset") \ | |
2398 \ | |
2399 product(bool, UseNiagaraInstrs, false, \ | |
2400 "Use Niagara-efficient instruction subset") \ | |
2401 \ | |
2402 develop(bool, UseCASForSwap, false, \ | |
2403 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ | |
2404 \ | |
2405 product(bool, UseLoopCounter, true, \ | |
2406 "Increment invocation counter on backward branch") \ | |
2407 \ | |
2408 product(bool, UseFastEmptyMethods, true, \ | |
2409 "Use fast method entry code for empty methods") \ | |
2410 \ | |
2411 product(bool, UseFastAccessorMethods, true, \ | |
2412 "Use fast method entry code for accessor methods") \ | |
2413 \ | |
2414 product_pd(bool, UseOnStackReplacement, \ | |
2415 "Use on stack replacement, calls runtime if invoc. counter " \ | |
2416 "overflows in loop") \ | |
2417 \ | |
2418 notproduct(bool, TraceOnStackReplacement, false, \ | |
2419 "Trace on stack replacement") \ | |
2420 \ | |
2421 develop(bool, PoisonOSREntry, true, \ | |
2422 "Detect abnormal calls to OSR code") \ | |
2423 \ | |
2424 product_pd(bool, PreferInterpreterNativeStubs, \ | |
2425 "Use always interpreter stubs for native methods invoked via " \ | |
2426 "interpreter") \ | |
2427 \ | |
2428 develop(bool, CountBytecodes, false, \ | |
2429 "Count number of bytecodes executed") \ | |
2430 \ | |
2431 develop(bool, PrintBytecodeHistogram, false, \ | |
2432 "Print histogram of the executed bytecodes") \ | |
2433 \ | |
2434 develop(bool, PrintBytecodePairHistogram, false, \ | |
2435 "Print histogram of the executed bytecode pairs") \ | |
2436 \ | |
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2437 diagnostic(bool, PrintSignatureHandlers, false, \ |
0 | 2438 "Print code generated for native method signature handlers") \ |
2439 \ | |
2440 develop(bool, VerifyOops, false, \ | |
2441 "Do plausibility checks for oops") \ | |
2442 \ | |
2443 develop(bool, CheckUnhandledOops, false, \ | |
2444 "Check for unhandled oops in VM code") \ | |
2445 \ | |
2446 develop(bool, VerifyJNIFields, trueInDebug, \ | |
2447 "Verify jfieldIDs for instance fields") \ | |
2448 \ | |
2449 notproduct(bool, VerifyJNIEnvThread, false, \ | |
2450 "Verify JNIEnv.thread == Thread::current() when entering VM " \ | |
2451 "from JNI") \ | |
2452 \ | |
2453 develop(bool, VerifyFPU, false, \ | |
2454 "Verify FPU state (check for NaN's, etc.)") \ | |
2455 \ | |
2456 develop(bool, VerifyThread, false, \ | |
2457 "Watch the thread register for corruption (SPARC only)") \ | |
2458 \ | |
2459 develop(bool, VerifyActivationFrameSize, false, \ | |
2460 "Verify that activation frame didn't become smaller than its " \ | |
2461 "minimal size") \ | |
2462 \ | |
2463 develop(bool, TraceFrequencyInlining, false, \ | |
2464 "Trace frequency based inlining") \ | |
2465 \ | |
2466 notproduct(bool, TraceTypeProfile, false, \ | |
2467 "Trace type profile") \ | |
2468 \ | |
2469 develop_pd(bool, InlineIntrinsics, \ | |
2470 "Inline intrinsics that can be statically resolved") \ | |
2471 \ | |
2472 product_pd(bool, ProfileInterpreter, \ | |
2473 "Profile at the bytecode level during interpretation") \ | |
2474 \ | |
2475 develop_pd(bool, ProfileTraps, \ | |
2476 "Profile deoptimization traps at the bytecode level") \ | |
2477 \ | |
2478 product(intx, ProfileMaturityPercentage, 20, \ | |
2479 "number of method invocations/branches (expressed as % of " \ | |
2480 "CompileThreshold) before using the method's profile") \ | |
2481 \ | |
2482 develop(bool, PrintMethodData, false, \ | |
2483 "Print the results of +ProfileInterpreter at end of run") \ | |
2484 \ | |
2485 develop(bool, VerifyDataPointer, trueInDebug, \ | |
2486 "Verify the method data pointer during interpreter profiling") \ | |
2487 \ | |
2488 develop(bool, VerifyCompiledCode, false, \ | |
2489 "Include miscellaneous runtime verifications in nmethod code; " \ | |
2490 "off by default because it disturbs nmethod size heuristics.") \ | |
2491 \ | |
2492 \ | |
2493 /* compilation */ \ | |
2494 product(bool, UseCompiler, true, \ | |
2495 "use compilation") \ | |
2496 \ | |
2497 develop(bool, TraceCompilationPolicy, false, \ | |
2498 "Trace compilation policy") \ | |
2499 \ | |
2500 develop(bool, TimeCompilationPolicy, false, \ | |
2501 "Time the compilation policy") \ | |
2502 \ | |
2503 product(bool, UseCounterDecay, true, \ | |
2504 "adjust recompilation counters") \ | |
2505 \ | |
2506 develop(intx, CounterHalfLifeTime, 30, \ | |
2507 "half-life time of invocation counters (in secs)") \ | |
2508 \ | |
2509 develop(intx, CounterDecayMinIntervalLength, 500, \ | |
2510 "Min. ms. between invocation of CounterDecay") \ | |
2511 \ | |
2512 product(bool, AlwaysCompileLoopMethods, false, \ | |
2513 "when using recompilation, never interpret methods " \ | |
2514 "containing loops") \ | |
2515 \ | |
2516 product(bool, DontCompileHugeMethods, true, \ | |
2517 "don't compile methods > HugeMethodLimit") \ | |
2518 \ | |
2519 /* Bytecode escape analysis estimation. */ \ | |
2520 product(bool, EstimateArgEscape, true, \ | |
2521 "Analyze bytecodes to estimate escape state of arguments") \ | |
2522 \ | |
2523 product(intx, BCEATraceLevel, 0, \ | |
2524 "How much tracing to do of bytecode escape analysis estimates") \ | |
2525 \ | |
2526 product(intx, MaxBCEAEstimateLevel, 5, \ | |
2527 "Maximum number of nested calls that are analyzed by BC EA.") \ | |
2528 \ | |
2529 product(intx, MaxBCEAEstimateSize, 150, \ | |
2530 "Maximum bytecode size of a method to be analyzed by BC EA.") \ | |
2531 \ | |
2532 product(intx, AllocatePrefetchStyle, 1, \ | |
2533 "0 = no prefetch, " \ | |
2534 "1 = prefetch instructions for each allocation, " \ | |
2535 "2 = use TLAB watermark to gate allocation prefetch") \ | |
2536 \ | |
2537 product(intx, AllocatePrefetchDistance, -1, \ | |
2538 "Distance to prefetch ahead of allocation pointer") \ | |
2539 \ | |
2540 product(intx, AllocatePrefetchLines, 1, \ | |
2541 "Number of lines to prefetch ahead of allocation pointer") \ | |
2542 \ | |
2543 product(intx, AllocatePrefetchStepSize, 16, \ | |
2544 "Step size in bytes of sequential prefetch instructions") \ | |
2545 \ | |
2546 product(intx, AllocatePrefetchInstr, 0, \ | |
2547 "Prefetch instruction to prefetch ahead of allocation pointer") \ | |
2548 \ | |
2549 product(intx, ReadPrefetchInstr, 0, \ | |
2550 "Prefetch instruction to prefetch ahead") \ | |
2551 \ | |
2552 /* deoptimization */ \ | |
2553 develop(bool, TraceDeoptimization, false, \ | |
2554 "Trace deoptimization") \ | |
2555 \ | |
2556 develop(bool, DebugDeoptimization, false, \ | |
2557 "Tracing various information while debugging deoptimization") \ | |
2558 \ | |
2559 product(intx, SelfDestructTimer, 0, \ | |
2560 "Will cause VM to terminate after a given time (in minutes) " \ | |
2561 "(0 means off)") \ | |
2562 \ | |
2563 product(intx, MaxJavaStackTraceDepth, 1024, \ | |
2564 "Max. no. of lines in the stack trace for Java exceptions " \ | |
2565 "(0 means all)") \ | |
2566 \ | |
2567 develop(intx, GuaranteedSafepointInterval, 1000, \ | |
2568 "Guarantee a safepoint (at least) every so many milliseconds " \ | |
2569 "(0 means none)") \ | |
2570 \ | |
2571 product(intx, SafepointTimeoutDelay, 10000, \ | |
2572 "Delay in milliseconds for option SafepointTimeout") \ | |
2573 \ | |
2574 product(intx, NmethodSweepFraction, 4, \ | |
2575 "Number of invocations of sweeper to cover all nmethods") \ | |
2576 \ | |
2577 notproduct(intx, MemProfilingInterval, 500, \ | |
2578 "Time between each invocation of the MemProfiler") \ | |
2579 \ | |
2580 develop(intx, MallocCatchPtr, -1, \ | |
2581 "Hit breakpoint when mallocing/freeing this pointer") \ | |
2582 \ | |
2583 notproduct(intx, AssertRepeat, 1, \ | |
2584 "number of times to evaluate expression in assert " \ | |
2585 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ | |
2586 \ | |
2587 notproduct(ccstrlist, SuppressErrorAt, "", \ | |
2588 "List of assertions (file:line) to muzzle") \ | |
2589 \ | |
2590 notproduct(uintx, HandleAllocationLimit, 1024, \ | |
2591 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ | |
2592 "is used") \ | |
2593 \ | |
2594 develop(uintx, TotalHandleAllocationLimit, 1024, \ | |
2595 "Threshold for total handle allocation when " \ | |
2596 "+TraceHandleAllocation is used") \ | |
2597 \ | |
2598 develop(intx, StackPrintLimit, 100, \ | |
2599 "number of stack frames to print in VM-level stack dump") \ | |
2600 \ | |
2601 notproduct(intx, MaxElementPrintSize, 256, \ | |
2602 "maximum number of elements to print") \ | |
2603 \ | |
2604 notproduct(intx, MaxSubklassPrintSize, 4, \ | |
2605 "maximum number of subklasses to print when printing klass") \ | |
2606 \ | |
2607 develop(intx, MaxInlineLevel, 9, \ | |
2608 "maximum number of nested calls that are inlined") \ | |
2609 \ | |
2610 develop(intx, MaxRecursiveInlineLevel, 1, \ | |
2611 "maximum number of nested recursive calls that are inlined") \ | |
2612 \ | |
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2613 product(intx, InlineSmallCode, 1000, \ |
0 | 2614 "Only inline already compiled methods if their code size is " \ |
2615 "less than this") \ | |
2616 \ | |
2617 product(intx, MaxInlineSize, 35, \ | |
2618 "maximum bytecode size of a method to be inlined") \ | |
2619 \ | |
2620 product_pd(intx, FreqInlineSize, \ | |
2621 "maximum bytecode size of a frequent method to be inlined") \ | |
2622 \ | |
2623 develop(intx, MaxTrivialSize, 6, \ | |
2624 "maximum bytecode size of a trivial method to be inlined") \ | |
2625 \ | |
2626 develop(intx, MinInliningThreshold, 250, \ | |
2627 "min. invocation count a method needs to have to be inlined") \ | |
2628 \ | |
2629 develop(intx, AlignEntryCode, 4, \ | |
2630 "aligns entry code to specified value (in bytes)") \ | |
2631 \ | |
2632 develop(intx, MethodHistogramCutoff, 100, \ | |
2633 "cutoff value for method invoc. histogram (+CountCalls)") \ | |
2634 \ | |
2635 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ | |
2636 "# of interpreted methods to show in profile") \ | |
2637 \ | |
2638 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ | |
2639 "# of compiled methods to show in profile") \ | |
2640 \ | |
2641 develop(intx, ProfilerNumberOfStubMethods, 25, \ | |
2642 "# of stub methods to show in profile") \ | |
2643 \ | |
2644 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ | |
2645 "# of runtime stub nodes to show in profile") \ | |
2646 \ | |
2647 product(intx, ProfileIntervalsTicks, 100, \ | |
2648 "# of ticks between printing of interval profile " \ | |
2649 "(+ProfileIntervals)") \ | |
2650 \ | |
2651 notproduct(intx, ScavengeALotInterval, 1, \ | |
2652 "Interval between which scavenge will occur with +ScavengeALot") \ | |
2653 \ | |
2654 notproduct(intx, FullGCALotInterval, 1, \ | |
2655 "Interval between which full gc will occur with +FullGCALot") \ | |
2656 \ | |
2657 notproduct(intx, FullGCALotStart, 0, \ | |
2658 "For which invocation to start FullGCAlot") \ | |
2659 \ | |
2660 notproduct(intx, FullGCALotDummies, 32*K, \ | |
2661 "Dummy object allocated with +FullGCALot, forcing all objects " \ | |
2662 "to move") \ | |
2663 \ | |
2664 develop(intx, DontYieldALotInterval, 10, \ | |
2665 "Interval between which yields will be dropped (milliseconds)") \ | |
2666 \ | |
2667 develop(intx, MinSleepInterval, 1, \ | |
2668 "Minimum sleep() interval (milliseconds) when " \ | |
2669 "ConvertSleepToYield is off (used for SOLARIS)") \ | |
2670 \ | |
2671 product(intx, EventLogLength, 2000, \ | |
2672 "maximum nof events in event log") \ | |
2673 \ | |
2674 develop(intx, ProfilerPCTickThreshold, 15, \ | |
2675 "Number of ticks in a PC buckets to be a hotspot") \ | |
2676 \ | |
2677 notproduct(intx, DeoptimizeALotInterval, 5, \ | |
2678 "Number of exits until DeoptimizeALot kicks in") \ | |
2679 \ | |
2680 notproduct(intx, ZombieALotInterval, 5, \ | |
2681 "Number of exits until ZombieALot kicks in") \ | |
2682 \ | |
2683 develop(bool, StressNonEntrant, false, \ | |
2684 "Mark nmethods non-entrant at registration") \ | |
2685 \ | |
2686 diagnostic(intx, MallocVerifyInterval, 0, \ | |
2687 "if non-zero, verify C heap after every N calls to " \ | |
2688 "malloc/realloc/free") \ | |
2689 \ | |
2690 diagnostic(intx, MallocVerifyStart, 0, \ | |
2691 "if non-zero, start verifying C heap after Nth call to " \ | |
2692 "malloc/realloc/free") \ | |
2693 \ | |
2694 product(intx, TypeProfileWidth, 2, \ | |
2695 "number of receiver types to record in call/cast profile") \ | |
2696 \ | |
2697 develop(intx, BciProfileWidth, 2, \ | |
2698 "number of return bci's to record in ret profile") \ | |
2699 \ | |
2700 product(intx, PerMethodRecompilationCutoff, 400, \ | |
2701 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ | |
2702 \ | |
2703 product(intx, PerBytecodeRecompilationCutoff, 100, \ | |
2704 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ | |
2705 \ | |
2706 product(intx, PerMethodTrapLimit, 100, \ | |
2707 "Limit on traps (of one kind) in a method (includes inlines)") \ | |
2708 \ | |
2709 product(intx, PerBytecodeTrapLimit, 4, \ | |
2710 "Limit on traps (of one kind) at a particular BCI") \ | |
2711 \ | |
2712 develop(intx, FreqCountInvocations, 1, \ | |
2713 "Scaling factor for branch frequencies (deprecated)") \ | |
2714 \ | |
2715 develop(intx, InlineFrequencyRatio, 20, \ | |
2716 "Ratio of call site execution to caller method invocation") \ | |
2717 \ | |
2718 develop_pd(intx, InlineFrequencyCount, \ | |
2719 "Count of call site execution necessary to trigger frequent " \ | |
2720 "inlining") \ | |
2721 \ | |
2722 develop(intx, InlineThrowCount, 50, \ | |
2723 "Force inlining of interpreted methods that throw this often") \ | |
2724 \ | |
2725 develop(intx, InlineThrowMaxSize, 200, \ | |
2726 "Force inlining of throwing methods smaller than this") \ | |
2727 \ | |
2728 product(intx, AliasLevel, 3, \ | |
2729 "0 for no aliasing, 1 for oop/field/static/array split, " \ | |
2730 "2 for class split, 3 for unique instances") \ | |
2731 \ | |
2732 develop(bool, VerifyAliases, false, \ | |
2733 "perform extra checks on the results of alias analysis") \ | |
2734 \ | |
2735 develop(intx, ProfilerNodeSize, 1024, \ | |
2736 "Size in K to allocate for the Profile Nodes of each thread") \ | |
2737 \ | |
2738 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ | |
2739 "Number of times to spin wait on a v8 atomic operation lock") \ | |
2740 \ | |
2741 product(intx, ReadSpinIterations, 100, \ | |
2742 "Number of read attempts before a yield (spin inner loop)") \ | |
2743 \ | |
2744 product_pd(intx, PreInflateSpin, \ | |
2745 "Number of times to spin wait before inflation") \ | |
2746 \ | |
2747 product(intx, PreBlockSpin, 10, \ | |
2748 "Number of times to spin in an inflated lock before going to " \ | |
2749 "an OS lock") \ | |
2750 \ | |
2751 /* gc parameters */ \ | |
2752 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \ | |
2753 "Default maximum size for object heap (in bytes)") \ | |
2754 \ | |
2755 product_pd(uintx, NewSize, \ | |
2756 "Default size of new generation (in bytes)") \ | |
2757 \ | |
2758 product(uintx, MaxNewSize, max_uintx, \ | |
2759 "Maximum size of new generation (in bytes)") \ | |
2760 \ | |
2761 product(uintx, PretenureSizeThreshold, 0, \ | |
2762 "Max size in bytes of objects allocated in DefNew generation") \ | |
2763 \ | |
2764 product_pd(uintx, TLABSize, \ | |
2765 "Default (or starting) size of TLAB (in bytes)") \ | |
2766 \ | |
2767 product(uintx, MinTLABSize, 2*K, \ | |
2768 "Minimum allowed TLAB size (in bytes)") \ | |
2769 \ | |
2770 product(uintx, TLABAllocationWeight, 35, \ | |
2771 "Allocation averaging weight") \ | |
2772 \ | |
2773 product(uintx, TLABWasteTargetPercent, 1, \ | |
2774 "Percentage of Eden that can be wasted") \ | |
2775 \ | |
2776 product(uintx, TLABRefillWasteFraction, 64, \ | |
2777 "Max TLAB waste at a refill (internal fragmentation)") \ | |
2778 \ | |
2779 product(uintx, TLABWasteIncrement, 4, \ | |
2780 "Increment allowed waste at slow allocation") \ | |
2781 \ | |
2782 product_pd(intx, SurvivorRatio, \ | |
2783 "Ratio of eden/survivor space size") \ | |
2784 \ | |
2785 product_pd(intx, NewRatio, \ | |
2786 "Ratio of new/old generation sizes") \ | |
2787 \ | |
2788 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ | |
2789 "Max percent of eden objects that will be live at scavenge") \ | |
2790 \ | |
2791 product_pd(uintx, NewSizeThreadIncrease, \ | |
2792 "Additional size added to desired new generation size per " \ | |
2793 "non-daemon thread (in bytes)") \ | |
2794 \ | |
2795 product(uintx, OldSize, ScaleForWordSize(4096*K), \ | |
2796 "Default size of tenured generation (in bytes)") \ | |
2797 \ | |
2798 product_pd(uintx, PermSize, \ | |
2799 "Default size of permanent generation (in bytes)") \ | |
2800 \ | |
2801 product_pd(uintx, MaxPermSize, \ | |
2802 "Maximum size of permanent generation (in bytes)") \ | |
2803 \ | |
2804 product(uintx, MinHeapFreeRatio, 40, \ | |
2805 "Min percentage of heap free after GC to avoid expansion") \ | |
2806 \ | |
2807 product(uintx, MaxHeapFreeRatio, 70, \ | |
2808 "Max percentage of heap free after GC to avoid shrinking") \ | |
2809 \ | |
2810 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ | |
2811 "Number of milliseconds per MB of free space in the heap") \ | |
2812 \ | |
2813 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ | |
2814 "Min change in heap space due to GC (in bytes)") \ | |
2815 \ | |
2816 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ | |
2817 "Min expansion of permanent heap (in bytes)") \ | |
2818 \ | |
2819 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ | |
2820 "Max expansion of permanent heap without full GC (in bytes)") \ | |
2821 \ | |
2822 product(intx, QueuedAllocationWarningCount, 0, \ | |
2823 "Number of times an allocation that queues behind a GC " \ | |
2824 "will retry before printing a warning") \ | |
2825 \ | |
2826 diagnostic(uintx, VerifyGCStartAt, 0, \ | |
2827 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ | |
2828 \ | |
2829 diagnostic(intx, VerifyGCLevel, 0, \ | |
2830 "Generation level at which to start +VerifyBefore/AfterGC") \ | |
2831 \ | |
2832 develop(uintx, ExitAfterGCNum, 0, \ | |
2833 "If non-zero, exit after this GC.") \ | |
2834 \ | |
2835 product(intx, MaxTenuringThreshold, 15, \ | |
2836 "Maximum value for tenuring threshold") \ | |
2837 \ | |
2838 product(intx, InitialTenuringThreshold, 7, \ | |
2839 "Initial value for tenuring threshold") \ | |
2840 \ | |
2841 product(intx, TargetSurvivorRatio, 50, \ | |
2842 "Desired percentage of survivor space used after scavenge") \ | |
2843 \ | |
438 | 2844 product(uintx, MarkSweepDeadRatio, 5, \ |
0 | 2845 "Percentage (0-100) of the old gen allowed as dead wood." \ |
2846 "Serial mark sweep treats this as both the min and max value." \ | |
2847 "CMS uses this value only if it falls back to mark sweep." \ | |
2848 "Par compact uses a variable scale based on the density of the" \ | |
2849 "generation and treats this as the max value when the heap is" \ | |
2850 "either completely full or completely empty. Par compact also" \ | |
2851 "has a smaller default value; see arguments.cpp.") \ | |
2852 \ | |
438 | 2853 product(uintx, PermMarkSweepDeadRatio, 20, \ |
0 | 2854 "Percentage (0-100) of the perm gen allowed as dead wood." \ |
2855 "See MarkSweepDeadRatio for collector-specific comments.") \ | |
2856 \ | |
2857 product(intx, MarkSweepAlwaysCompactCount, 4, \ | |
2858 "How often should we fully compact the heap (ignoring the dead " \ | |
2859 "space parameters)") \ | |
2860 \ | |
2861 product(intx, PrintCMSStatistics, 0, \ | |
2862 "Statistics for CMS") \ | |
2863 \ | |
2864 product(bool, PrintCMSInitiationStatistics, false, \ | |
2865 "Statistics for initiating a CMS collection") \ | |
2866 \ | |
2867 product(intx, PrintFLSStatistics, 0, \ | |
2868 "Statistics for CMS' FreeListSpace") \ | |
2869 \ | |
2870 product(intx, PrintFLSCensus, 0, \ | |
2871 "Census for CMS' FreeListSpace") \ | |
2872 \ | |
2873 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ | |
2874 "Delay in ms between expansion and allocation") \ | |
2875 \ | |
2876 product(intx, DeferThrSuspendLoopCount, 4000, \ | |
2877 "(Unstable) Number of times to iterate in safepoint loop " \ | |
2878 " before blocking VM threads ") \ | |
2879 \ | |
2880 product(intx, DeferPollingPageLoopCount, -1, \ | |
2881 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ | |
2882 "before changing safepoint polling page to RO ") \ | |
2883 \ | |
2884 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ | |
2885 \ | |
2886 product(bool, UseDepthFirstScavengeOrder, true, \ | |
2887 "true: the scavenge order will be depth-first, " \ | |
2888 "false: the scavenge order will be breadth-first") \ | |
2889 \ | |
2890 product(bool, PSChunkLargeArrays, true, \ | |
2891 "true: process large arrays in chunks") \ | |
2892 \ | |
2893 product(uintx, GCDrainStackTargetSize, 64, \ | |
2894 "how many entries we'll try to leave on the stack during " \ | |
2895 "parallel GC") \ | |
2896 \ | |
342
37f87013dfd8
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2897 product(intx, DCQBarrierQueueBufferSize, 256, \ |
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parents:
142
diff
changeset
|
2898 "Number of elements in a dirty card queue buffer") \ |
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parents:
142
diff
changeset
|
2899 \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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diff
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|
2900 product(intx, DCQBarrierProcessCompletedThreshold, 5, \ |
37f87013dfd8
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diff
changeset
|
2901 "Number of completed dirty card buffers to trigger processing.") \ |
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2902 \ |
0 | 2903 /* stack parameters */ \ |
2904 product_pd(intx, StackYellowPages, \ | |
2905 "Number of yellow zone (recoverable overflows) pages") \ | |
2906 \ | |
2907 product_pd(intx, StackRedPages, \ | |
2908 "Number of red zone (unrecoverable overflows) pages") \ | |
2909 \ | |
2910 product_pd(intx, StackShadowPages, \ | |
2911 "Number of shadow zone (for overflow checking) pages" \ | |
2912 " this should exceed the depth of the VM and native call stack") \ | |
2913 \ | |
2914 product_pd(intx, ThreadStackSize, \ | |
2915 "Thread Stack Size (in Kbytes)") \ | |
2916 \ | |
2917 product_pd(intx, VMThreadStackSize, \ | |
2918 "Non-Java Thread Stack Size (in Kbytes)") \ | |
2919 \ | |
2920 product_pd(intx, CompilerThreadStackSize, \ | |
2921 "Compiler Thread Stack Size (in Kbytes)") \ | |
2922 \ | |
2923 develop_pd(uintx, JVMInvokeMethodSlack, \ | |
2924 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ | |
2925 \ | |
2926 product(uintx, ThreadSafetyMargin, 50*M, \ | |
2927 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ | |
2928 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ | |
2929 "disable this feature") \ | |
2930 \ | |
2931 /* code cache parameters */ \ | |
2932 develop(uintx, CodeCacheSegmentSize, 64, \ | |
2933 "Code cache segment size (in bytes) - smallest unit of " \ | |
2934 "allocation") \ | |
2935 \ | |
2936 develop_pd(intx, CodeEntryAlignment, \ | |
2937 "Code entry alignment for generated code (in bytes)") \ | |
2938 \ | |
2939 product_pd(uintx, InitialCodeCacheSize, \ | |
2940 "Initial code cache size (in bytes)") \ | |
2941 \ | |
2942 product_pd(uintx, ReservedCodeCacheSize, \ | |
2943 "Reserved code cache size (in bytes) - maximum code cache size") \ | |
2944 \ | |
2945 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ | |
2946 "When less than X space left, we stop compiling.") \ | |
2947 \ | |
2948 product_pd(uintx, CodeCacheExpansionSize, \ | |
2949 "Code cache expansion size (in bytes)") \ | |
2950 \ | |
2951 develop_pd(uintx, CodeCacheMinBlockLength, \ | |
2952 "Minimum number of segments in a code cache block.") \ | |
2953 \ | |
2954 notproduct(bool, ExitOnFullCodeCache, false, \ | |
2955 "Exit the VM if we fill the code cache.") \ | |
2956 \ | |
2957 /* interpreter debugging */ \ | |
2958 develop(intx, BinarySwitchThreshold, 5, \ | |
2959 "Minimal number of lookupswitch entries for rewriting to binary " \ | |
2960 "switch") \ | |
2961 \ | |
2962 develop(intx, StopInterpreterAt, 0, \ | |
2963 "Stops interpreter execution at specified bytecode number") \ | |
2964 \ | |
2965 develop(intx, TraceBytecodesAt, 0, \ | |
2966 "Traces bytecodes starting with specified bytecode number") \ | |
2967 \ | |
2968 /* compiler interface */ \ | |
2969 develop(intx, CIStart, 0, \ | |
2970 "the id of the first compilation to permit") \ | |
2971 \ | |
2972 develop(intx, CIStop, -1, \ | |
2973 "the id of the last compilation to permit") \ | |
2974 \ | |
2975 develop(intx, CIStartOSR, 0, \ | |
2976 "the id of the first osr compilation to permit " \ | |
2977 "(CICountOSR must be on)") \ | |
2978 \ | |
2979 develop(intx, CIStopOSR, -1, \ | |
2980 "the id of the last osr compilation to permit " \ | |
2981 "(CICountOSR must be on)") \ | |
2982 \ | |
2983 develop(intx, CIBreakAtOSR, -1, \ | |
2984 "id of osr compilation to break at") \ | |
2985 \ | |
2986 develop(intx, CIBreakAt, -1, \ | |
2987 "id of compilation to break at") \ | |
2988 \ | |
2989 product(ccstrlist, CompileOnly, "", \ | |
2990 "List of methods (pkg/class.name) to restrict compilation to") \ | |
2991 \ | |
2992 product(ccstr, CompileCommandFile, NULL, \ | |
2993 "Read compiler commands from this file [.hotspot_compiler]") \ | |
2994 \ | |
2995 product(ccstrlist, CompileCommand, "", \ | |
2996 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ | |
2997 \ | |
2998 product(bool, CICompilerCountPerCPU, false, \ | |
2999 "1 compiler thread for log(N CPUs)") \ | |
3000 \ | |
3001 develop(intx, CIFireOOMAt, -1, \ | |
3002 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ | |
3003 "(non-negative value throws OOM after this many CI accesses " \ | |
3004 "in each compile)") \ | |
3005 \ | |
3006 develop(intx, CIFireOOMAtDelay, -1, \ | |
3007 "Wait for this many CI accesses to occur in all compiles before " \ | |
3008 "beginning to throw OutOfMemoryErrors in each compile") \ | |
3009 \ | |
3010 /* Priorities */ \ | |
3011 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ | |
3012 \ | |
3013 product(intx, ThreadPriorityPolicy, 0, \ | |
3014 "0 : Normal. "\ | |
3015 " VM chooses priorities that are appropriate for normal "\ | |
3016 " applications. On Solaris NORM_PRIORITY and above are mapped "\ | |
3017 " to normal native priority. Java priorities below NORM_PRIORITY"\ | |
3018 " map to lower native priority values. On Windows applications"\ | |
3019 " are allowed to use higher native priorities. However, with "\ | |
3020 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ | |
3021 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ | |
3022 " interfere with system threads. On Linux thread priorities "\ | |
3023 " are ignored because the OS does not support static priority "\ | |
3024 " in SCHED_OTHER scheduling class which is the only choice for"\ | |
3025 " non-root, non-realtime applications. "\ | |
3026 "1 : Aggressive. "\ | |
3027 " Java thread priorities map over to the entire range of "\ | |
3028 " native thread priorities. Higher Java thread priorities map "\ | |
3029 " to higher native thread priorities. This policy should be "\ | |
3030 " used with care, as sometimes it can cause performance "\ | |
3031 " degradation in the application and/or the entire system. On "\ | |
3032 " Linux this policy requires root privilege.") \ | |
3033 \ | |
3034 product(bool, ThreadPriorityVerbose, false, \ | |
3035 "print priority changes") \ | |
3036 \ | |
3037 product(intx, DefaultThreadPriority, -1, \ | |
3038 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ | |
3039 \ | |
3040 product(intx, CompilerThreadPriority, -1, \ | |
3041 "what priority should compiler threads run at (-1 means no change)") \ | |
3042 \ | |
3043 product(intx, VMThreadPriority, -1, \ | |
3044 "what priority should VM threads run at (-1 means no change)") \ | |
3045 \ | |
3046 product(bool, CompilerThreadHintNoPreempt, true, \ | |
3047 "(Solaris only) Give compiler threads an extra quanta") \ | |
3048 \ | |
3049 product(bool, VMThreadHintNoPreempt, false, \ | |
3050 "(Solaris only) Give VM thread an extra quanta") \ | |
3051 \ | |
3052 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3053 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3054 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3055 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3056 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3057 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3058 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3059 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3060 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3061 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ | |
3062 \ | |
3063 /* compiler debugging */ \ | |
3064 notproduct(intx, CompileTheWorldStartAt, 1, \ | |
3065 "First class to consider when using +CompileTheWorld") \ | |
3066 \ | |
3067 notproduct(intx, CompileTheWorldStopAt, max_jint, \ | |
3068 "Last class to consider when using +CompileTheWorld") \ | |
3069 \ | |
3070 develop(intx, NewCodeParameter, 0, \ | |
3071 "Testing Only: Create a dedicated integer parameter before " \ | |
3072 "putback") \ | |
3073 \ | |
3074 /* new oopmap storage allocation */ \ | |
3075 develop(intx, MinOopMapAllocation, 8, \ | |
3076 "Minimum number of OopMap entries in an OopMapSet") \ | |
3077 \ | |
3078 /* Background Compilation */ \ | |
3079 develop(intx, LongCompileThreshold, 50, \ | |
3080 "Used with +TraceLongCompiles") \ | |
3081 \ | |
3082 product(intx, StarvationMonitorInterval, 200, \ | |
3083 "Pause between each check in ms") \ | |
3084 \ | |
3085 /* recompilation */ \ | |
3086 product_pd(intx, CompileThreshold, \ | |
3087 "number of interpreted method invocations before (re-)compiling") \ | |
3088 \ | |
3089 product_pd(intx, BackEdgeThreshold, \ | |
3090 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ | |
3091 \ | |
3092 product(intx, Tier1BytecodeLimit, 10, \ | |
3093 "Must have at least this many bytecodes before tier1" \ | |
3094 "invocation counters are used") \ | |
3095 \ | |
3096 product_pd(intx, Tier2CompileThreshold, \ | |
3097 "threshold at which a tier 2 compilation is invoked") \ | |
3098 \ | |
3099 product_pd(intx, Tier2BackEdgeThreshold, \ | |
3100 "Back edge threshold at which a tier 2 compilation is invoked") \ | |
3101 \ | |
3102 product_pd(intx, Tier3CompileThreshold, \ | |
3103 "threshold at which a tier 3 compilation is invoked") \ | |
3104 \ | |
3105 product_pd(intx, Tier3BackEdgeThreshold, \ | |
3106 "Back edge threshold at which a tier 3 compilation is invoked") \ | |
3107 \ | |
3108 product_pd(intx, Tier4CompileThreshold, \ | |
3109 "threshold at which a tier 4 compilation is invoked") \ | |
3110 \ | |
3111 product_pd(intx, Tier4BackEdgeThreshold, \ | |
3112 "Back edge threshold at which a tier 4 compilation is invoked") \ | |
3113 \ | |
3114 product_pd(bool, TieredCompilation, \ | |
3115 "Enable two-tier compilation") \ | |
3116 \ | |
3117 product(bool, StressTieredRuntime, false, \ | |
3118 "Alternate client and server compiler on compile requests") \ | |
3119 \ | |
3120 product_pd(intx, OnStackReplacePercentage, \ | |
3121 "NON_TIERED number of method invocations/branches (expressed as %"\ | |
3122 "of CompileThreshold) before (re-)compiling OSR code") \ | |
3123 \ | |
3124 product(intx, InterpreterProfilePercentage, 33, \ | |
3125 "NON_TIERED number of method invocations/branches (expressed as %"\ | |
3126 "of CompileThreshold) before profiling in the interpreter") \ | |
3127 \ | |
3128 develop(intx, MaxRecompilationSearchLength, 10, \ | |
3129 "max. # frames to inspect searching for recompilee") \ | |
3130 \ | |
3131 develop(intx, MaxInterpretedSearchLength, 3, \ | |
3132 "max. # interp. frames to skip when searching for recompilee") \ | |
3133 \ | |
3134 develop(intx, DesiredMethodLimit, 8000, \ | |
3135 "desired max. method size (in bytecodes) after inlining") \ | |
3136 \ | |
3137 develop(intx, HugeMethodLimit, 8000, \ | |
3138 "don't compile methods larger than this if " \ | |
3139 "+DontCompileHugeMethods") \ | |
3140 \ | |
3141 /* New JDK 1.4 reflection implementation */ \ | |
3142 \ | |
3143 develop(bool, UseNewReflection, true, \ | |
3144 "Temporary flag for transition to reflection based on dynamic " \ | |
3145 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ | |
3146 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ | |
3147 "changes were needed") \ | |
3148 \ | |
3149 develop(bool, VerifyReflectionBytecodes, false, \ | |
3150 "Force verification of 1.4 reflection bytecodes. Does not work " \ | |
3151 "in situations like that described in 4486457 or for " \ | |
3152 "constructors generated for serialization, so can not be enabled "\ | |
3153 "in product.") \ | |
3154 \ | |
3155 product(bool, ReflectionWrapResolutionErrors, true, \ | |
3156 "Temporary flag for transition to AbstractMethodError wrapped " \ | |
3157 "in InvocationTargetException. See 6531596") \ | |
3158 \ | |
3159 \ | |
3160 develop(intx, FastSuperclassLimit, 8, \ | |
3161 "Depth of hardwired instanceof accelerator array") \ | |
3162 \ | |
3163 /* Properties for Java libraries */ \ | |
3164 \ | |
3165 product(intx, MaxDirectMemorySize, -1, \ | |
3166 "Maximum total size of NIO direct-buffer allocations") \ | |
3167 \ | |
3168 /* temporary developer defined flags */ \ | |
3169 \ | |
3170 diagnostic(bool, UseNewCode, false, \ | |
3171 "Testing Only: Use the new version while testing") \ | |
3172 \ | |
3173 diagnostic(bool, UseNewCode2, false, \ | |
3174 "Testing Only: Use the new version while testing") \ | |
3175 \ | |
3176 diagnostic(bool, UseNewCode3, false, \ | |
3177 "Testing Only: Use the new version while testing") \ | |
3178 \ | |
3179 /* flags for performance data collection */ \ | |
3180 \ | |
3181 product(bool, UsePerfData, true, \ | |
3182 "Flag to disable jvmstat instrumentation for performance testing" \ | |
3183 "and problem isolation purposes.") \ | |
3184 \ | |
3185 product(bool, PerfDataSaveToFile, false, \ | |
3186 "Save PerfData memory to hsperfdata_<pid> file on exit") \ | |
3187 \ | |
3188 product(ccstr, PerfDataSaveFile, NULL, \ | |
3189 "Save PerfData memory to the specified absolute pathname," \ | |
3190 "%p in the file name if present will be replaced by pid") \ | |
3191 \ | |
3192 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ | |
3193 "Data sampling interval in milliseconds") \ | |
3194 \ | |
3195 develop(bool, PerfTraceDataCreation, false, \ | |
3196 "Trace creation of Performance Data Entries") \ | |
3197 \ | |
3198 develop(bool, PerfTraceMemOps, false, \ | |
3199 "Trace PerfMemory create/attach/detach calls") \ | |
3200 \ | |
3201 product(bool, PerfDisableSharedMem, false, \ | |
3202 "Store performance data in standard memory") \ | |
3203 \ | |
3204 product(intx, PerfDataMemorySize, 32*K, \ | |
3205 "Size of performance data memory region. Will be rounded " \ | |
3206 "up to a multiple of the native os page size.") \ | |
3207 \ | |
3208 product(intx, PerfMaxStringConstLength, 1024, \ | |
3209 "Maximum PerfStringConstant string length before truncation") \ | |
3210 \ | |
3211 product(bool, PerfAllowAtExitRegistration, false, \ | |
3212 "Allow registration of atexit() methods") \ | |
3213 \ | |
3214 product(bool, PerfBypassFileSystemCheck, false, \ | |
3215 "Bypass Win32 file system criteria checks (Windows Only)") \ | |
3216 \ | |
3217 product(intx, UnguardOnExecutionViolation, 0, \ | |
3218 "Unguard page and retry on no-execute fault (Win32 only)" \ | |
3219 "0=off, 1=conservative, 2=aggressive") \ | |
3220 \ | |
3221 /* Serviceability Support */ \ | |
3222 \ | |
3223 product(bool, ManagementServer, false, \ | |
3224 "Create JMX Management Server") \ | |
3225 \ | |
3226 product(bool, DisableAttachMechanism, false, \ | |
3227 "Disable mechanism that allows tools to attach to this VM") \ | |
3228 \ | |
3229 product(bool, StartAttachListener, false, \ | |
3230 "Always start Attach Listener at VM startup") \ | |
3231 \ | |
3232 manageable(bool, PrintConcurrentLocks, false, \ | |
3233 "Print java.util.concurrent locks in thread dump") \ | |
3234 \ | |
3235 /* Shared spaces */ \ | |
3236 \ | |
3237 product(bool, UseSharedSpaces, true, \ | |
3238 "Use shared spaces in the permanent generation") \ | |
3239 \ | |
3240 product(bool, RequireSharedSpaces, false, \ | |
3241 "Require shared spaces in the permanent generation") \ | |
3242 \ | |
3243 product(bool, ForceSharedSpaces, false, \ | |
3244 "Require shared spaces in the permanent generation") \ | |
3245 \ | |
3246 product(bool, DumpSharedSpaces, false, \ | |
3247 "Special mode: JVM reads a class list, loads classes, builds " \ | |
3248 "shared spaces, and dumps the shared spaces to a file to be " \ | |
3249 "used in future JVM runs.") \ | |
3250 \ | |
3251 product(bool, PrintSharedSpaces, false, \ | |
3252 "Print usage of shared spaces") \ | |
3253 \ | |
3254 product(uintx, SharedDummyBlockSize, 512*M, \ | |
3255 "Size of dummy block used to shift heap addresses (in bytes)") \ | |
3256 \ | |
3257 product(uintx, SharedReadWriteSize, 12*M, \ | |
3258 "Size of read-write space in permanent generation (in bytes)") \ | |
3259 \ | |
3260 product(uintx, SharedReadOnlySize, 8*M, \ | |
3261 "Size of read-only space in permanent generation (in bytes)") \ | |
3262 \ | |
3263 product(uintx, SharedMiscDataSize, 4*M, \ | |
3264 "Size of the shared data area adjacent to the heap (in bytes)") \ | |
3265 \ | |
3266 product(uintx, SharedMiscCodeSize, 4*M, \ | |
3267 "Size of the shared code area adjacent to the heap (in bytes)") \ | |
3268 \ | |
3269 diagnostic(bool, SharedOptimizeColdStart, true, \ | |
3270 "At dump time, order shared objects to achieve better " \ | |
3271 "cold startup time.") \ | |
3272 \ | |
3273 develop(intx, SharedOptimizeColdStartPolicy, 2, \ | |
3274 "Reordering policy for SharedOptimizeColdStart " \ | |
3275 "0=favor classload-time locality, 1=balanced, " \ | |
3276 "2=favor runtime locality") \ | |
3277 \ | |
3278 diagnostic(bool, SharedSkipVerify, false, \ | |
3279 "Skip assert() and verify() which page-in unwanted shared " \ | |
3280 "objects. ") \ | |
3281 \ | |
431
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3282 product(bool, AnonymousClasses, false, \ |
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3283 "support sun.misc.Unsafe.defineAnonymousClass") \ |
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3284 \ |
0 | 3285 product(bool, TaggedStackInterpreter, false, \ |
3286 "Insert tags in interpreter execution stack for oopmap generaion")\ | |
3287 \ | |
3288 diagnostic(bool, PauseAtStartup, false, \ | |
3289 "Causes the VM to pause at startup time and wait for the pause " \ | |
3290 "file to be removed (default: ./vm.paused.<pid>)") \ | |
3291 \ | |
3292 diagnostic(ccstr, PauseAtStartupFile, NULL, \ | |
3293 "The file to create and for whose removal to await when pausing " \ | |
3294 "at startup. (default: ./vm.paused.<pid>)") \ | |
3295 \ | |
3296 product(bool, ExtendedDTraceProbes, false, \ | |
3297 "Enable performance-impacting dtrace probes") \ | |
3298 \ | |
3299 product(bool, DTraceMethodProbes, false, \ | |
3300 "Enable dtrace probes for method-entry and method-exit") \ | |
3301 \ | |
3302 product(bool, DTraceAllocProbes, false, \ | |
3303 "Enable dtrace probes for object allocation") \ | |
3304 \ | |
3305 product(bool, DTraceMonitorProbes, false, \ | |
3306 "Enable dtrace probes for monitor events") \ | |
3307 \ | |
3308 product(bool, RelaxAccessControlCheck, false, \ | |
3309 "Relax the access control checks in the verifier") \ | |
3310 \ | |
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3311 diagnostic(bool, PrintDTraceDOF, false, \ |
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3312 "Print the DTrace DOF passed to the system for JSDT probes") \ |
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3313 \ |
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3314 product(bool, UseVMInterruptibleIO, false, \ |
0 | 3315 "(Unstable, Solaris-specific) Thread interrupt before or with " \ |
449
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3316 "EINTR for I/O operations results in OS_INTRPT. The default value"\ |
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3317 " of this flag is true for JDK 6 and earliers") |
0 | 3318 |
3319 | |
3320 /* | |
3321 * Macros for factoring of globals | |
3322 */ | |
3323 | |
3324 // Interface macros | |
3325 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; | |
3326 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; | |
3327 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; | |
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3328 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; |
0 | 3329 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; |
3330 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; | |
3331 #ifdef PRODUCT | |
3332 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; | |
3333 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; | |
3334 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) | |
3335 #else | |
3336 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; | |
3337 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; | |
3338 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; | |
3339 #endif | |
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3340 // Special LP64 flags, product only needed for now. |
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3341 #ifdef _LP64 |
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3342 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; |
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3343 #else |
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3344 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; |
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3345 #endif // _LP64 |
0 | 3346 |
3347 // Implementation macros | |
3348 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; | |
3349 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; | |
3350 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; | |
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3351 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; |
0 | 3352 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; |
3353 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; | |
3354 #ifdef PRODUCT | |
3355 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ | |
3356 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ | |
3357 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) | |
3358 #else | |
3359 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; | |
3360 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; | |
3361 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; | |
3362 #endif | |
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3363 #ifdef _LP64 |
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3364 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; |
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3365 #else |
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3366 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ |
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3367 #endif // _LP64 |
0 | 3368 |
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3369 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 | 3370 |
3371 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) |