Mercurial > hg > truffle
annotate src/share/vm/runtime/globals.hpp @ 534:5cfd8d19e546
6786503: Overflow list performance can be improved
Summary: Avoid overflow list walk in CMS & ParNew when it is unnecessary. Fix a couple of correctness issues, including a C-heap leak, in ParNew at the intersection of promotion failure, work queue overflow and object array chunking. Add stress testing option and related assertion checking.
Reviewed-by: jmasa
author | ysr |
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date | Mon, 26 Jan 2009 12:47:21 -0800 |
parents | c81d2ef51ca3 |
children | 23673011938d |
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 \ | |
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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 \ | |
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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 \ | |
665 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ | |
666 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ | |
667 \ | |
668 manageable(ccstr, HeapDumpPath, NULL, \ | |
669 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ | |
670 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ | |
671 "in the working directory)") \ | |
672 \ | |
673 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ | |
674 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ | |
675 "when the heap usage is larger than this") \ | |
676 \ | |
677 develop(uintx, HeapDumpSegmentSize, 1*G, \ | |
678 "Approximate segment size when generating a segmented heap dump") \ | |
679 \ | |
680 develop(bool, BreakAtWarning, false, \ | |
681 "Execute breakpoint upon encountering VM warning") \ | |
682 \ | |
683 product_pd(bool, UseVectoredExceptions, \ | |
684 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ | |
685 \ | |
686 develop(bool, TraceVMOperation, false, \ | |
687 "Trace vm operations") \ | |
688 \ | |
689 develop(bool, UseFakeTimers, false, \ | |
690 "Tells whether the VM should use system time or a fake timer") \ | |
691 \ | |
692 diagnostic(bool, LogCompilation, false, \ | |
693 "Log compilation activity in detail to hotspot.log or LogFile") \ | |
694 \ | |
695 product(bool, PrintCompilation, false, \ | |
696 "Print compilations") \ | |
697 \ | |
698 diagnostic(bool, TraceNMethodInstalls, false, \ | |
699 "Trace nmethod intallation") \ | |
700 \ | |
701 diagnostic(bool, TraceOSRBreakpoint, false, \ | |
702 "Trace OSR Breakpoint ") \ | |
703 \ | |
704 diagnostic(bool, TraceCompileTriggered, false, \ | |
705 "Trace compile triggered") \ | |
706 \ | |
707 diagnostic(bool, TraceTriggers, false, \ | |
708 "Trace triggers") \ | |
709 \ | |
710 product(bool, AlwaysRestoreFPU, false, \ | |
711 "Restore the FPU control word after every JNI call (expensive)") \ | |
712 \ | |
713 notproduct(bool, PrintCompilation2, false, \ | |
714 "Print additional statistics per compilation") \ | |
715 \ | |
100
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716 diagnostic(bool, PrintAdapterHandlers, false, \ |
0 | 717 "Print code generated for i2c/c2i adapters") \ |
718 \ | |
100
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719 diagnostic(bool, PrintAssembly, false, \ |
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720 "Print assembly code (using external disassembler.so)") \ |
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721 \ |
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722 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ |
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723 "Options string passed to disassembler.so") \ |
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724 \ |
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725 diagnostic(bool, PrintNMethods, false, \ |
0 | 726 "Print assembly code for nmethods when generated") \ |
727 \ | |
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728 diagnostic(bool, PrintNativeNMethods, false, \ |
0 | 729 "Print assembly code for native nmethods when generated") \ |
730 \ | |
731 develop(bool, PrintDebugInfo, false, \ | |
732 "Print debug information for all nmethods when generated") \ | |
733 \ | |
734 develop(bool, PrintRelocations, false, \ | |
735 "Print relocation information for all nmethods when generated") \ | |
736 \ | |
737 develop(bool, PrintDependencies, false, \ | |
738 "Print dependency information for all nmethods when generated") \ | |
739 \ | |
740 develop(bool, PrintExceptionHandlers, false, \ | |
741 "Print exception handler tables for all nmethods when generated") \ | |
742 \ | |
743 develop(bool, InterceptOSException, false, \ | |
744 "Starts debugger when an implicit OS (e.g., NULL) " \ | |
745 "exception happens") \ | |
746 \ | |
747 notproduct(bool, PrintCodeCache, false, \ | |
748 "Print the compiled_code cache when exiting") \ | |
749 \ | |
750 develop(bool, PrintCodeCache2, false, \ | |
751 "Print detailed info on the compiled_code cache when exiting") \ | |
752 \ | |
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753 diagnostic(bool, PrintStubCode, false, \ |
0 | 754 "Print generated stub code") \ |
755 \ | |
756 product(bool, StackTraceInThrowable, true, \ | |
757 "Collect backtrace in throwable when exception happens") \ | |
758 \ | |
759 product(bool, OmitStackTraceInFastThrow, true, \ | |
760 "Omit backtraces for some 'hot' exceptions in optimized code") \ | |
761 \ | |
762 product(bool, ProfilerPrintByteCodeStatistics, false, \ | |
763 "Prints byte code statictics when dumping profiler output") \ | |
764 \ | |
765 product(bool, ProfilerRecordPC, false, \ | |
766 "Collects tick for each 16 byte interval of compiled code") \ | |
767 \ | |
768 product(bool, ProfileVM, false, \ | |
769 "Profiles ticks that fall within VM (either in the VM Thread " \ | |
770 "or VM code called through stubs)") \ | |
771 \ | |
772 product(bool, ProfileIntervals, false, \ | |
773 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ | |
774 \ | |
775 notproduct(bool, ProfilerCheckIntervals, false, \ | |
776 "Collect and print info on spacing of profiler ticks") \ | |
777 \ | |
778 develop(bool, PrintJVMWarnings, false, \ | |
779 "Prints warnings for unimplemented JVM functions") \ | |
780 \ | |
781 notproduct(uintx, WarnOnStalledSpinLock, 0, \ | |
782 "Prints warnings for stalled SpinLocks") \ | |
783 \ | |
784 develop(bool, InitializeJavaLangSystem, true, \ | |
785 "Initialize java.lang.System - turn off for individual " \ | |
786 "method debugging") \ | |
787 \ | |
788 develop(bool, InitializeJavaLangString, true, \ | |
789 "Initialize java.lang.String - turn off for individual " \ | |
790 "method debugging") \ | |
791 \ | |
792 develop(bool, InitializeJavaLangExceptionsErrors, true, \ | |
793 "Initialize various error and exception classes - turn off for " \ | |
794 "individual method debugging") \ | |
795 \ | |
796 product(bool, RegisterFinalizersAtInit, true, \ | |
797 "Register finalizable objects at end of Object.<init> or " \ | |
798 "after allocation.") \ | |
799 \ | |
800 develop(bool, RegisterReferences, true, \ | |
801 "Tells whether the VM should register soft/weak/final/phantom " \ | |
802 "references") \ | |
803 \ | |
804 develop(bool, IgnoreRewrites, false, \ | |
805 "Supress rewrites of bytecodes in the oopmap generator. " \ | |
806 "This is unsafe!") \ | |
807 \ | |
808 develop(bool, PrintCodeCacheExtension, false, \ | |
809 "Print extension of code cache") \ | |
810 \ | |
811 develop(bool, UsePrivilegedStack, true, \ | |
812 "Enable the security JVM functions") \ | |
813 \ | |
814 develop(bool, IEEEPrecision, true, \ | |
815 "Enables IEEE precision (for INTEL only)") \ | |
816 \ | |
817 develop(bool, ProtectionDomainVerification, true, \ | |
818 "Verifies protection domain before resolution in system " \ | |
819 "dictionary") \ | |
820 \ | |
821 product(bool, ClassUnloading, true, \ | |
822 "Do unloading of classes") \ | |
823 \ | |
474
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824 diagnostic(bool, LinkWellKnownClasses, false, \ |
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825 "Resolve a well known class as soon as its name is seen") \ |
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826 \ |
0 | 827 develop(bool, DisableStartThread, false, \ |
828 "Disable starting of additional Java threads " \ | |
829 "(for debugging only)") \ | |
830 \ | |
831 develop(bool, MemProfiling, false, \ | |
832 "Write memory usage profiling to log file") \ | |
833 \ | |
834 notproduct(bool, PrintSystemDictionaryAtExit, false, \ | |
835 "Prints the system dictionary at exit") \ | |
836 \ | |
837 diagnostic(bool, UnsyncloadClass, false, \ | |
514 | 838 "Unstable: VM calls loadClass unsynchronized. Custom " \ |
839 "class loader must call VM synchronized for findClass " \ | |
840 "and defineClass.") \ | |
841 \ | |
842 product(bool, AlwaysLockClassLoader, false, \ | |
843 "Require the VM to acquire the class loader lock before calling " \ | |
844 "loadClass() even for class loaders registering " \ | |
845 "as parallel capable. Default false. ") \ | |
846 \ | |
847 product(bool, AllowParallelDefineClass, false, \ | |
848 "Allow parallel defineClass requests for class loaders " \ | |
849 "registering as parallel capable. Default false") \ | |
850 \ | |
851 product(bool, MustCallLoadClassInternal, false, \ | |
852 "Call loadClassInternal() rather than loadClass().Default false") \ | |
0 | 853 \ |
854 product_pd(bool, DontYieldALot, \ | |
855 "Throw away obvious excess yield calls (for SOLARIS only)") \ | |
856 \ | |
857 product_pd(bool, ConvertSleepToYield, \ | |
858 "Converts sleep(0) to thread yield " \ | |
859 "(may be off for SOLARIS to improve GUI)") \ | |
860 \ | |
861 product(bool, ConvertYieldToSleep, false, \ | |
862 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ | |
863 "behavior (SOLARIS only)") \ | |
864 \ | |
865 product(bool, UseBoundThreads, true, \ | |
866 "Bind user level threads to kernel threads (for SOLARIS only)") \ | |
867 \ | |
868 develop(bool, UseDetachedThreads, true, \ | |
869 "Use detached threads that are recycled upon termination " \ | |
870 "(for SOLARIS only)") \ | |
871 \ | |
872 product(bool, UseLWPSynchronization, true, \ | |
873 "Use LWP-based instead of libthread-based synchronization " \ | |
874 "(SPARC only)") \ | |
875 \ | |
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876 product(ccstr, SyncKnobs, NULL, \ |
0 | 877 "(Unstable) Various monitor synchronization tunables") \ |
878 \ | |
879 product(intx, EmitSync, 0, \ | |
880 "(Unsafe,Unstable) " \ | |
881 " Controls emission of inline sync fast-path code") \ | |
882 \ | |
883 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ | |
884 \ | |
885 product(intx, Atomics, 0, \ | |
886 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ | |
887 \ | |
888 product(intx, FenceInstruction, 0, \ | |
889 "(Unsafe,Unstable) Experimental") \ | |
890 \ | |
891 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ | |
892 \ | |
893 product(intx, SyncVerbose, 0, "(Unstable)" ) \ | |
894 \ | |
895 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ | |
896 \ | |
897 product(intx, hashCode, 0, \ | |
898 "(Unstable) select hashCode generation algorithm" ) \ | |
899 \ | |
900 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ | |
901 "(Unstable, Linux-specific)" \ | |
902 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ | |
903 \ | |
904 product(bool, FilterSpuriousWakeups , true, \ | |
905 "Prevent spurious or premature wakeups from object.wait" \ | |
906 "(Solaris only)") \ | |
907 \ | |
908 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ | |
909 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ | |
910 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ | |
911 \ | |
912 develop(bool, UsePthreads, false, \ | |
913 "Use pthread-based instead of libthread-based synchronization " \ | |
914 "(SPARC only)") \ | |
915 \ | |
916 product(bool, AdjustConcurrency, false, \ | |
917 "call thr_setconcurrency at thread create time to avoid " \ | |
918 "LWP starvation on MP systems (For Solaris Only)") \ | |
919 \ | |
920 develop(bool, UpdateHotSpotCompilerFileOnError, true, \ | |
921 "Should the system attempt to update the compiler file when " \ | |
922 "an error occurs?") \ | |
923 \ | |
924 product(bool, ReduceSignalUsage, false, \ | |
925 "Reduce the use of OS signals in Java and/or the VM") \ | |
926 \ | |
927 notproduct(bool, ValidateMarkSweep, false, \ | |
928 "Do extra validation during MarkSweep collection") \ | |
929 \ | |
930 notproduct(bool, RecordMarkSweepCompaction, false, \ | |
931 "Enable GC-to-GC recording and querying of compaction during " \ | |
932 "MarkSweep") \ | |
933 \ | |
934 develop_pd(bool, ShareVtableStubs, \ | |
935 "Share vtable stubs (smaller code but worse branch prediction") \ | |
936 \ | |
937 develop(bool, LoadLineNumberTables, true, \ | |
938 "Tells whether the class file parser loads line number tables") \ | |
939 \ | |
940 develop(bool, LoadLocalVariableTables, true, \ | |
941 "Tells whether the class file parser loads local variable tables")\ | |
942 \ | |
943 develop(bool, LoadLocalVariableTypeTables, true, \ | |
944 "Tells whether the class file parser loads local variable type tables")\ | |
945 \ | |
946 product(bool, AllowUserSignalHandlers, false, \ | |
947 "Do not complain if the application installs signal handlers " \ | |
948 "(Solaris & Linux only)") \ | |
949 \ | |
950 product(bool, UseSignalChaining, true, \ | |
951 "Use signal-chaining to invoke signal handlers installed " \ | |
952 "by the application (Solaris & Linux only)") \ | |
953 \ | |
954 product(bool, UseAltSigs, false, \ | |
955 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ | |
956 "internal signals. (Solaris only)") \ | |
957 \ | |
958 product(bool, UseSpinning, false, \ | |
959 "Use spinning in monitor inflation and before entry") \ | |
960 \ | |
961 product(bool, PreSpinYield, false, \ | |
962 "Yield before inner spinning loop") \ | |
963 \ | |
964 product(bool, PostSpinYield, true, \ | |
965 "Yield after inner spinning loop") \ | |
966 \ | |
967 product(bool, AllowJNIEnvProxy, false, \ | |
968 "Allow JNIEnv proxies for jdbx") \ | |
969 \ | |
970 product(bool, JNIDetachReleasesMonitors, true, \ | |
971 "JNI DetachCurrentThread releases monitors owned by thread") \ | |
972 \ | |
973 product(bool, RestoreMXCSROnJNICalls, false, \ | |
974 "Restore MXCSR when returning from JNI calls") \ | |
975 \ | |
976 product(bool, CheckJNICalls, false, \ | |
977 "Verify all arguments to JNI calls") \ | |
978 \ | |
979 product(bool, UseFastJNIAccessors, true, \ | |
980 "Use optimized versions of Get<Primitive>Field") \ | |
981 \ | |
982 product(bool, EagerXrunInit, false, \ | |
983 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ | |
984 " but not all -Xrun libraries may support the state of the VM at this time") \ | |
985 \ | |
986 product(bool, PreserveAllAnnotations, false, \ | |
987 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ | |
988 \ | |
989 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ | |
990 "Number of OutOfMemoryErrors preallocated with backtrace") \ | |
991 \ | |
992 product(bool, LazyBootClassLoader, true, \ | |
993 "Enable/disable lazy opening of boot class path entries") \ | |
994 \ | |
995 diagnostic(bool, UseIncDec, true, \ | |
996 "Use INC, DEC instructions on x86") \ | |
997 \ | |
219 | 998 product(bool, UseNewLongLShift, false, \ |
999 "Use optimized bitwise shift left") \ | |
1000 \ | |
0 | 1001 product(bool, UseStoreImmI16, true, \ |
1002 "Use store immediate 16-bits value instruction on x86") \ | |
1003 \ | |
1004 product(bool, UseAddressNop, false, \ | |
1005 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ | |
1006 \ | |
1007 product(bool, UseXmmLoadAndClearUpper, true, \ | |
1008 "Load low part of XMM register and clear upper part") \ | |
1009 \ | |
1010 product(bool, UseXmmRegToRegMoveAll, false, \ | |
1011 "Copy all XMM register bits when moving value between registers") \ | |
1012 \ | |
71 | 1013 product(bool, UseXmmI2D, false, \ |
1014 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ | |
1015 \ | |
1016 product(bool, UseXmmI2F, false, \ | |
1017 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ | |
1018 \ | |
405 | 1019 product(bool, UseXMMForArrayCopy, false, \ |
1020 "Use SSE2 MOVQ instruction for Arraycopy") \ | |
1021 \ | |
1022 product(bool, UseUnalignedLoadStores, false, \ | |
1023 "Use SSE2 MOVDQU instruction for Arraycopy") \ | |
1024 \ | |
0 | 1025 product(intx, FieldsAllocationStyle, 1, \ |
1026 "0 - type based with oops first, 1 - with oops last") \ | |
1027 \ | |
1028 product(bool, CompactFields, true, \ | |
1029 "Allocate nonstatic fields in gaps between previous fields") \ | |
1030 \ | |
1031 notproduct(bool, PrintCompactFieldsSavings, false, \ | |
1032 "Print how many words were saved with CompactFields") \ | |
1033 \ | |
1034 product(bool, UseBiasedLocking, true, \ | |
1035 "Enable biased locking in JVM") \ | |
1036 \ | |
1037 product(intx, BiasedLockingStartupDelay, 4000, \ | |
1038 "Number of milliseconds to wait before enabling biased locking") \ | |
1039 \ | |
1040 diagnostic(bool, PrintBiasedLockingStatistics, false, \ | |
1041 "Print statistics of biased locking in JVM") \ | |
1042 \ | |
1043 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ | |
1044 "Threshold of number of revocations per type to try to " \ | |
1045 "rebias all objects in the heap of that type") \ | |
1046 \ | |
1047 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ | |
1048 "Threshold of number of revocations per type to permanently " \ | |
1049 "revoke biases of all objects in the heap of that type") \ | |
1050 \ | |
1051 product(intx, BiasedLockingDecayTime, 25000, \ | |
1052 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ | |
1053 "type after previous bulk rebias") \ | |
1054 \ | |
1055 /* tracing */ \ | |
1056 \ | |
1057 notproduct(bool, TraceRuntimeCalls, false, \ | |
1058 "Trace run-time calls") \ | |
1059 \ | |
1060 develop(bool, TraceJNICalls, false, \ | |
1061 "Trace JNI calls") \ | |
1062 \ | |
1063 notproduct(bool, TraceJVMCalls, false, \ | |
1064 "Trace JVM calls") \ | |
1065 \ | |
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1066 product(ccstr, TraceJVMTI, NULL, \ |
0 | 1067 "Trace flags for JVMTI functions and events") \ |
1068 \ | |
1069 /* This option can change an EMCP method into an obsolete method. */ \ | |
1070 /* This can affect tests that except specific methods to be EMCP. */ \ | |
1071 /* This option should be used with caution. */ \ | |
1072 product(bool, StressLdcRewrite, false, \ | |
1073 "Force ldc -> ldc_w rewrite during RedefineClasses") \ | |
1074 \ | |
1075 product(intx, TraceRedefineClasses, 0, \ | |
1076 "Trace level for JVMTI RedefineClasses") \ | |
1077 \ | |
1078 /* change to false by default sometime after Mustang */ \ | |
1079 product(bool, VerifyMergedCPBytecodes, true, \ | |
1080 "Verify bytecodes after RedefineClasses constant pool merging") \ | |
1081 \ | |
1082 develop(bool, TraceJNIHandleAllocation, false, \ | |
1083 "Trace allocation/deallocation of JNI handle blocks") \ | |
1084 \ | |
1085 develop(bool, TraceThreadEvents, false, \ | |
1086 "Trace all thread events") \ | |
1087 \ | |
1088 develop(bool, TraceBytecodes, false, \ | |
1089 "Trace bytecode execution") \ | |
1090 \ | |
1091 develop(bool, TraceClassInitialization, false, \ | |
1092 "Trace class initialization") \ | |
1093 \ | |
1094 develop(bool, TraceExceptions, false, \ | |
1095 "Trace exceptions") \ | |
1096 \ | |
1097 develop(bool, TraceICs, false, \ | |
1098 "Trace inline cache changes") \ | |
1099 \ | |
1100 notproduct(bool, TraceInvocationCounterOverflow, false, \ | |
1101 "Trace method invocation counter overflow") \ | |
1102 \ | |
1103 develop(bool, TraceInlineCacheClearing, false, \ | |
1104 "Trace clearing of inline caches in nmethods") \ | |
1105 \ | |
1106 develop(bool, TraceDependencies, false, \ | |
1107 "Trace dependencies") \ | |
1108 \ | |
1109 develop(bool, VerifyDependencies, trueInDebug, \ | |
1110 "Exercise and verify the compilation dependency mechanism") \ | |
1111 \ | |
1112 develop(bool, TraceNewOopMapGeneration, false, \ | |
1113 "Trace OopMapGeneration") \ | |
1114 \ | |
1115 develop(bool, TraceNewOopMapGenerationDetailed, false, \ | |
1116 "Trace OopMapGeneration: print detailed cell states") \ | |
1117 \ | |
1118 develop(bool, TimeOopMap, false, \ | |
1119 "Time calls to GenerateOopMap::compute_map() in sum") \ | |
1120 \ | |
1121 develop(bool, TimeOopMap2, false, \ | |
1122 "Time calls to GenerateOopMap::compute_map() individually") \ | |
1123 \ | |
1124 develop(bool, TraceMonitorMismatch, false, \ | |
1125 "Trace monitor matching failures during OopMapGeneration") \ | |
1126 \ | |
1127 develop(bool, TraceOopMapRewrites, false, \ | |
1128 "Trace rewritting of method oops during oop map generation") \ | |
1129 \ | |
1130 develop(bool, TraceSafepoint, false, \ | |
1131 "Trace safepoint operations") \ | |
1132 \ | |
1133 develop(bool, TraceICBuffer, false, \ | |
1134 "Trace usage of IC buffer") \ | |
1135 \ | |
1136 develop(bool, TraceCompiledIC, false, \ | |
1137 "Trace changes of compiled IC") \ | |
1138 \ | |
1139 notproduct(bool, TraceZapDeadLocals, false, \ | |
1140 "Trace zapping dead locals") \ | |
1141 \ | |
1142 develop(bool, TraceStartupTime, false, \ | |
1143 "Trace setup time") \ | |
1144 \ | |
1145 develop(bool, TraceHPI, false, \ | |
1146 "Trace Host Porting Interface (HPI)") \ | |
1147 \ | |
1148 product(ccstr, HPILibPath, NULL, \ | |
1149 "Specify alternate path to HPI library") \ | |
1150 \ | |
1151 develop(bool, TraceProtectionDomainVerification, false, \ | |
1152 "Trace protection domain verifcation") \ | |
1153 \ | |
1154 develop(bool, TraceClearedExceptions, false, \ | |
1155 "Prints when an exception is forcibly cleared") \ | |
1156 \ | |
1157 product(bool, TraceClassResolution, false, \ | |
1158 "Trace all constant pool resolutions (for debugging)") \ | |
1159 \ | |
1160 product(bool, TraceBiasedLocking, false, \ | |
1161 "Trace biased locking in JVM") \ | |
1162 \ | |
1163 product(bool, TraceMonitorInflation, false, \ | |
1164 "Trace monitor inflation in JVM") \ | |
1165 \ | |
1166 /* assembler */ \ | |
1167 product(bool, Use486InstrsOnly, false, \ | |
1168 "Use 80486 Compliant instruction subset") \ | |
1169 \ | |
1170 /* gc */ \ | |
1171 \ | |
1172 product(bool, UseSerialGC, false, \ | |
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1173 "Use the serial garbage collector") \ |
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1174 \ |
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1175 experimental(bool, UseG1GC, false, \ |
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1176 "Use the Garbage-First garbage collector") \ |
0 | 1177 \ |
1178 product(bool, UseParallelGC, false, \ | |
1179 "Use the Parallel Scavenge garbage collector") \ | |
1180 \ | |
1181 product(bool, UseParallelOldGC, false, \ | |
1182 "Use the Parallel Old garbage collector") \ | |
1183 \ | |
1184 product(bool, UseParallelOldGCCompacting, true, \ | |
1185 "In the Parallel Old garbage collector use parallel compaction") \ | |
1186 \ | |
1187 product(bool, UseParallelDensePrefixUpdate, true, \ | |
1188 "In the Parallel Old garbage collector use parallel dense" \ | |
1189 " prefix update") \ | |
1190 \ | |
1191 product(uintx, HeapMaximumCompactionInterval, 20, \ | |
1192 "How often should we maximally compact the heap (not allowing " \ | |
1193 "any dead space)") \ | |
1194 \ | |
1195 product(uintx, HeapFirstMaximumCompactionCount, 3, \ | |
1196 "The collection count for the first maximum compaction") \ | |
1197 \ | |
1198 product(bool, UseMaximumCompactionOnSystemGC, true, \ | |
1199 "In the Parallel Old garbage collector maximum compaction for " \ | |
1200 "a system GC") \ | |
1201 \ | |
1202 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ | |
1203 "The mean used by the par compact dead wood" \ | |
1204 "limiter (a number between 0-100).") \ | |
1205 \ | |
1206 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ | |
1207 "The standard deviation used by the par compact dead wood" \ | |
1208 "limiter (a number between 0-100).") \ | |
1209 \ | |
1210 product(bool, UseParallelOldGCDensePrefix, true, \ | |
1211 "Use a dense prefix with the Parallel Old garbage collector") \ | |
1212 \ | |
1213 product(uintx, ParallelGCThreads, 0, \ | |
1214 "Number of parallel threads parallel gc will use") \ | |
1215 \ | |
1216 product(uintx, ParallelCMSThreads, 0, \ | |
1217 "Max number of threads CMS will use for concurrent work") \ | |
1218 \ | |
483
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1219 develop(bool, ParallelOldGCSplitALot, false, \ |
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1220 "Provoke splitting (copying data from a young gen space to" \ |
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1221 "multiple destination spaces)") \ |
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1222 \ |
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1223 develop(uintx, ParallelOldGCSplitInterval, 3, \ |
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1224 "How often to provoke splitting a young gen space") \ |
0 | 1225 \ |
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1226 develop(bool, TraceRegionTasksQueuing, false, \ |
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1227 "Trace the queuing of the region tasks") \ |
0 | 1228 \ |
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1229 product(uintx, ParallelMarkingThreads, 0, \ |
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1230 "Number of marking threads concurrent gc will use") \ |
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1231 \ |
0 | 1232 product(uintx, YoungPLABSize, 4096, \ |
1233 "Size of young gen promotion labs (in HeapWords)") \ | |
1234 \ | |
1235 product(uintx, OldPLABSize, 1024, \ | |
1236 "Size of old gen promotion labs (in HeapWords)") \ | |
1237 \ | |
1238 product(uintx, GCTaskTimeStampEntries, 200, \ | |
1239 "Number of time stamp entries per gc worker thread") \ | |
1240 \ | |
1241 product(bool, AlwaysTenure, false, \ | |
1242 "Always tenure objects in eden. (ParallelGC only)") \ | |
1243 \ | |
1244 product(bool, NeverTenure, false, \ | |
1245 "Never tenure objects in eden, May tenure on overflow" \ | |
1246 " (ParallelGC only)") \ | |
1247 \ | |
1248 product(bool, ScavengeBeforeFullGC, true, \ | |
1249 "Scavenge youngest generation before each full GC," \ | |
1250 " used with UseParallelGC") \ | |
1251 \ | |
1252 develop(bool, ScavengeWithObjectsInToSpace, false, \ | |
1253 "Allow scavenges to occur when to_space contains objects.") \ | |
1254 \ | |
1255 product(bool, UseConcMarkSweepGC, false, \ | |
1256 "Use Concurrent Mark-Sweep GC in the old generation") \ | |
1257 \ | |
1258 product(bool, ExplicitGCInvokesConcurrent, false, \ | |
1259 "A System.gc() request invokes a concurrent collection;" \ | |
1260 " (effective only when UseConcMarkSweepGC)") \ | |
1261 \ | |
1262 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ | |
1263 "A System.gc() request invokes a concurrent collection and" \ | |
1264 " also unloads classes during such a concurrent gc cycle " \ | |
1265 " (effective only when UseConcMarkSweepGC)") \ | |
1266 \ | |
1267 develop(bool, UseCMSAdaptiveFreeLists, true, \ | |
1268 "Use Adaptive Free Lists in the CMS generation") \ | |
1269 \ | |
1270 develop(bool, UseAsyncConcMarkSweepGC, true, \ | |
1271 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ | |
1272 \ | |
1273 develop(bool, RotateCMSCollectionTypes, false, \ | |
1274 "Rotate the CMS collections among concurrent and STW") \ | |
1275 \ | |
1276 product(bool, UseCMSBestFit, true, \ | |
1277 "Use CMS best fit allocation strategy") \ | |
1278 \ | |
1279 product(bool, UseCMSCollectionPassing, true, \ | |
1280 "Use passing of collection from background to foreground") \ | |
1281 \ | |
1282 product(bool, UseParNewGC, false, \ | |
1283 "Use parallel threads in the new generation.") \ | |
1284 \ | |
1285 product(bool, ParallelGCVerbose, false, \ | |
1286 "Verbose output for parallel GC.") \ | |
1287 \ | |
1288 product(intx, ParallelGCBufferWastePct, 10, \ | |
1289 "wasted fraction of parallel allocation buffer.") \ | |
1290 \ | |
1291 product(bool, ParallelGCRetainPLAB, true, \ | |
1292 "Retain parallel allocation buffers across scavenges.") \ | |
1293 \ | |
1294 product(intx, TargetPLABWastePct, 10, \ | |
1295 "target wasted space in last buffer as pct of overall allocation")\ | |
1296 \ | |
1297 product(uintx, PLABWeight, 75, \ | |
1298 "Percentage (0-100) used to weight the current sample when" \ | |
1299 "computing exponentially decaying average for ResizePLAB.") \ | |
1300 \ | |
1301 product(bool, ResizePLAB, true, \ | |
1302 "Dynamically resize (survivor space) promotion labs") \ | |
1303 \ | |
1304 product(bool, PrintPLAB, false, \ | |
1305 "Print (survivor space) promotion labs sizing decisions") \ | |
1306 \ | |
1307 product(intx, ParGCArrayScanChunk, 50, \ | |
1308 "Scan a subset and push remainder, if array is bigger than this") \ | |
1309 \ | |
534 | 1310 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ |
1311 "Whether we should simulate work queue overflow in ParNew") \ | |
1312 \ | |
1313 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ | |
1314 "An `interval' counter that determines how frequently" \ | |
1315 " we simulate overflow; a smaller number increases frequency") \ | |
1316 \ | |
1317 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ | |
0 | 1318 "The desired number of objects to claim from the overflow list") \ |
1319 \ | |
1320 product(uintx, CMSParPromoteBlocksToClaim, 50, \ | |
1321 "Number of blocks to attempt to claim when refilling CMS LAB for "\ | |
1322 "parallel GC.") \ | |
1323 \ | |
1324 product(bool, AlwaysPreTouch, false, \ | |
1325 "It forces all freshly committed pages to be pre-touched.") \ | |
1326 \ | |
1327 product(bool, CMSUseOldDefaults, false, \ | |
1328 "A flag temporarily introduced to allow reverting to some older" \ | |
1329 "default settings; older as of 6.0 ") \ | |
1330 \ | |
1331 product(intx, CMSYoungGenPerWorker, 16*M, \ | |
1332 "The amount of young gen chosen by default per GC worker " \ | |
1333 "thread available ") \ | |
1334 \ | |
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1335 product(bool, GCOverheadReporting, false, \ |
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1336 "Enables the GC overhead reporting facility") \ |
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1337 \ |
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1338 product(intx, GCOverheadReportingPeriodMS, 100, \ |
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1339 "Reporting period for conc GC overhead reporting, in ms ") \ |
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1340 \ |
0 | 1341 product(bool, CMSIncrementalMode, false, \ |
1342 "Whether CMS GC should operate in \"incremental\" mode") \ | |
1343 \ | |
1344 product(uintx, CMSIncrementalDutyCycle, 10, \ | |
1345 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ | |
1346 "CMSIncrementalPacing is enabled, then this is just the initial" \ | |
1347 "value") \ | |
1348 \ | |
1349 product(bool, CMSIncrementalPacing, true, \ | |
1350 "Whether the CMS incremental mode duty cycle should be " \ | |
1351 "automatically adjusted") \ | |
1352 \ | |
1353 product(uintx, CMSIncrementalDutyCycleMin, 0, \ | |
1354 "Lower bound on the duty cycle when CMSIncrementalPacing is" \ | |
1355 "enabled (a percentage, 0-100).") \ | |
1356 \ | |
1357 product(uintx, CMSIncrementalSafetyFactor, 10, \ | |
1358 "Percentage (0-100) used to add conservatism when computing the" \ | |
1359 "duty cycle.") \ | |
1360 \ | |
1361 product(uintx, CMSIncrementalOffset, 0, \ | |
1362 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ | |
1363 "is shifted to the right within the period between young GCs") \ | |
1364 \ | |
1365 product(uintx, CMSExpAvgFactor, 25, \ | |
1366 "Percentage (0-100) used to weight the current sample when" \ | |
1367 "computing exponential averages for CMS statistics.") \ | |
1368 \ | |
1369 product(uintx, CMS_FLSWeight, 50, \ | |
1370 "Percentage (0-100) used to weight the current sample when" \ | |
1371 "computing exponentially decating averages for CMS FLS statistics.") \ | |
1372 \ | |
1373 product(uintx, CMS_FLSPadding, 2, \ | |
1374 "The multiple of deviation from mean to use for buffering" \ | |
1375 "against volatility in free list demand.") \ | |
1376 \ | |
1377 product(uintx, FLSCoalescePolicy, 2, \ | |
1378 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ | |
1379 \ | |
1380 product(uintx, CMS_SweepWeight, 50, \ | |
1381 "Percentage (0-100) used to weight the current sample when" \ | |
1382 "computing exponentially decaying average for inter-sweep duration.") \ | |
1383 \ | |
1384 product(uintx, CMS_SweepPadding, 2, \ | |
1385 "The multiple of deviation from mean to use for buffering" \ | |
1386 "against volatility in inter-sweep duration.") \ | |
1387 \ | |
1388 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ | |
1389 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ | |
1390 " duration exceeds this threhold in milliseconds") \ | |
1391 \ | |
1392 develop(bool, CMSTraceIncrementalMode, false, \ | |
1393 "Trace CMS incremental mode") \ | |
1394 \ | |
1395 develop(bool, CMSTraceIncrementalPacing, false, \ | |
1396 "Trace CMS incremental mode pacing computation") \ | |
1397 \ | |
1398 develop(bool, CMSTraceThreadState, false, \ | |
1399 "Trace the CMS thread state (enable the trace_state() method)") \ | |
1400 \ | |
1401 product(bool, CMSClassUnloadingEnabled, false, \ | |
1402 "Whether class unloading enabled when using CMS GC") \ | |
1403 \ | |
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1404 product(uintx, CMSClassUnloadingMaxInterval, 0, \ |
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1405 "When CMS class unloading is enabled, the maximum CMS cycle count"\ |
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1406 " for which classes may not be unloaded") \ |
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1407 \ |
0 | 1408 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ |
1409 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ | |
1410 \ | |
1411 product(bool, UseCMSCompactAtFullCollection, true, \ | |
1412 "Use mark sweep compact at full collections") \ | |
1413 \ | |
1414 product(uintx, CMSFullGCsBeforeCompaction, 0, \ | |
1415 "Number of CMS full collection done before compaction if > 0") \ | |
1416 \ | |
1417 develop(intx, CMSDictionaryChoice, 0, \ | |
1418 "Use BinaryTreeDictionary as default in the CMS generation") \ | |
1419 \ | |
1420 product(uintx, CMSIndexedFreeListReplenish, 4, \ | |
1421 "Replenish and indexed free list with this number of chunks") \ | |
1422 \ | |
1423 product(bool, CMSLoopWarn, false, \ | |
1424 "Warn in case of excessive CMS looping") \ | |
1425 \ | |
1426 develop(bool, CMSOverflowEarlyRestoration, false, \ | |
1427 "Whether preserved marks should be restored early") \ | |
1428 \ | |
1429 product(uintx, CMSMarkStackSize, 32*K, \ | |
1430 "Size of CMS marking stack") \ | |
1431 \ | |
1432 product(uintx, CMSMarkStackSizeMax, 4*M, \ | |
1433 "Max size of CMS marking stack") \ | |
1434 \ | |
1435 notproduct(bool, CMSMarkStackOverflowALot, false, \ | |
1436 "Whether we should simulate frequent marking stack / work queue" \ | |
1437 " overflow") \ | |
1438 \ | |
534 | 1439 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ |
1440 "An `interval' counter that determines how frequently" \ | |
0 | 1441 " we simulate overflow; a smaller number increases frequency") \ |
1442 \ | |
1443 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ | |
1444 "(Temporary, subject to experimentation)" \ | |
1445 "Maximum number of abortable preclean iterations, if > 0") \ | |
1446 \ | |
1447 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ | |
1448 "(Temporary, subject to experimentation)" \ | |
1449 "Maximum time in abortable preclean in ms") \ | |
1450 \ | |
1451 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ | |
1452 "(Temporary, subject to experimentation)" \ | |
1453 "Nominal minimum work per abortable preclean iteration") \ | |
1454 \ | |
1455 product(intx, CMSAbortablePrecleanWaitMillis, 100, \ | |
1456 "(Temporary, subject to experimentation)" \ | |
1457 " Time that we sleep between iterations when not given" \ | |
1458 " enough work per iteration") \ | |
1459 \ | |
1460 product(uintx, CMSRescanMultiple, 32, \ | |
1461 "Size (in cards) of CMS parallel rescan task") \ | |
1462 \ | |
1463 product(uintx, CMSConcMarkMultiple, 32, \ | |
1464 "Size (in cards) of CMS concurrent MT marking task") \ | |
1465 \ | |
1466 product(uintx, CMSRevisitStackSize, 1*M, \ | |
1467 "Size of CMS KlassKlass revisit stack") \ | |
1468 \ | |
1469 product(bool, CMSAbortSemantics, false, \ | |
1470 "Whether abort-on-overflow semantics is implemented") \ | |
1471 \ | |
1472 product(bool, CMSParallelRemarkEnabled, true, \ | |
1473 "Whether parallel remark enabled (only if ParNewGC)") \ | |
1474 \ | |
1475 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ | |
1476 "Whether parallel remark of survivor space" \ | |
1477 " enabled (effective only if CMSParallelRemarkEnabled)") \ | |
1478 \ | |
1479 product(bool, CMSPLABRecordAlways, true, \ | |
1480 "Whether to always record survivor space PLAB bdries" \ | |
1481 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ | |
1482 \ | |
1483 product(bool, CMSConcurrentMTEnabled, true, \ | |
1484 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ | |
1485 \ | |
1486 product(bool, CMSPermGenPrecleaningEnabled, true, \ | |
1487 "Whether concurrent precleaning enabled in perm gen" \ | |
1488 " (effective only when CMSPrecleaningEnabled is true)") \ | |
1489 \ | |
1490 product(bool, CMSPrecleaningEnabled, true, \ | |
1491 "Whether concurrent precleaning enabled") \ | |
1492 \ | |
1493 product(uintx, CMSPrecleanIter, 3, \ | |
1494 "Maximum number of precleaning iteration passes") \ | |
1495 \ | |
1496 product(uintx, CMSPrecleanNumerator, 2, \ | |
1497 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ | |
1498 " ratio") \ | |
1499 \ | |
1500 product(uintx, CMSPrecleanDenominator, 3, \ | |
1501 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ | |
1502 " ratio") \ | |
1503 \ | |
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1504 product(bool, CMSPrecleanRefLists1, true, \ |
0 | 1505 "Preclean ref lists during (initial) preclean phase") \ |
1506 \ | |
1507 product(bool, CMSPrecleanRefLists2, false, \ | |
1508 "Preclean ref lists during abortable preclean phase") \ | |
1509 \ | |
1510 product(bool, CMSPrecleanSurvivors1, false, \ | |
1511 "Preclean survivors during (initial) preclean phase") \ | |
1512 \ | |
1513 product(bool, CMSPrecleanSurvivors2, true, \ | |
1514 "Preclean survivors during abortable preclean phase") \ | |
1515 \ | |
1516 product(uintx, CMSPrecleanThreshold, 1000, \ | |
1517 "Don't re-iterate if #dirty cards less than this") \ | |
1518 \ | |
1519 product(bool, CMSCleanOnEnter, true, \ | |
1520 "Clean-on-enter optimization for reducing number of dirty cards") \ | |
1521 \ | |
1522 product(uintx, CMSRemarkVerifyVariant, 1, \ | |
1523 "Choose variant (1,2) of verification following remark") \ | |
1524 \ | |
1525 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ | |
1526 "If Eden used is below this value, don't try to schedule remark") \ | |
1527 \ | |
1528 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ | |
1529 "The Eden occupancy % at which to try and schedule remark pause") \ | |
1530 \ | |
1531 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ | |
1532 "Start sampling Eden top at least before yg occupancy reaches" \ | |
1533 " 1/<ratio> of the size at which we plan to schedule remark") \ | |
1534 \ | |
1535 product(uintx, CMSSamplingGrain, 16*K, \ | |
1536 "The minimum distance between eden samples for CMS (see above)") \ | |
1537 \ | |
1538 product(bool, CMSScavengeBeforeRemark, false, \ | |
1539 "Attempt scavenge before the CMS remark step") \ | |
1540 \ | |
1541 develop(bool, CMSTraceSweeper, false, \ | |
1542 "Trace some actions of the CMS sweeper") \ | |
1543 \ | |
1544 product(uintx, CMSWorkQueueDrainThreshold, 10, \ | |
1545 "Don't drain below this size per parallel worker/thief") \ | |
1546 \ | |
1547 product(intx, CMSWaitDuration, 2000, \ | |
1548 "Time in milliseconds that CMS thread waits for young GC") \ | |
1549 \ | |
1550 product(bool, CMSYield, true, \ | |
1551 "Yield between steps of concurrent mark & sweep") \ | |
1552 \ | |
1553 product(uintx, CMSBitMapYieldQuantum, 10*M, \ | |
1554 "Bitmap operations should process at most this many bits" \ | |
1555 "between yields") \ | |
1556 \ | |
1557 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ | |
1558 "Verify that all refs across the FLS boundary " \ | |
1559 " are to valid objects") \ | |
1560 \ | |
1561 diagnostic(bool, FLSVerifyLists, false, \ | |
1562 "Do lots of (expensive) FreeListSpace verification") \ | |
1563 \ | |
1564 diagnostic(bool, FLSVerifyIndexTable, false, \ | |
1565 "Do lots of (expensive) FLS index table verification") \ | |
1566 \ | |
1567 develop(bool, FLSVerifyDictionary, false, \ | |
1568 "Do lots of (expensive) FLS dictionary verification") \ | |
1569 \ | |
1570 develop(bool, VerifyBlockOffsetArray, false, \ | |
1571 "Do (expensive!) block offset array verification") \ | |
1572 \ | |
1573 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ | |
1574 "Maintain _unallocated_block in BlockOffsetArray" \ | |
1575 " (currently applicable only to CMS collector)") \ | |
1576 \ | |
1577 develop(bool, TraceCMSState, false, \ | |
1578 "Trace the state of the CMS collection") \ | |
1579 \ | |
1580 product(intx, RefDiscoveryPolicy, 0, \ | |
1581 "Whether reference-based(0) or referent-based(1)") \ | |
1582 \ | |
1583 product(bool, ParallelRefProcEnabled, false, \ | |
1584 "Enable parallel reference processing whenever possible") \ | |
1585 \ | |
1586 product(bool, ParallelRefProcBalancingEnabled, true, \ | |
1587 "Enable balancing of reference processing queues") \ | |
1588 \ | |
1589 product(intx, CMSTriggerRatio, 80, \ | |
1590 "Percentage of MinHeapFreeRatio in CMS generation that is " \ | |
1591 " allocated before a CMS collection cycle commences") \ | |
1592 \ | |
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1593 product(intx, CMSTriggerPermRatio, 80, \ |
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1594 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \ |
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1595 " is allocated before a CMS collection cycle commences, that " \ |
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|
1596 " also collects the perm generation") \ |
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1597 \ |
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1598 product(uintx, CMSBootstrapOccupancy, 50, \ |
0 | 1599 "Percentage CMS generation occupancy at which to " \ |
1600 " initiate CMS collection for bootstrapping collection stats") \ | |
1601 \ | |
1602 product(intx, CMSInitiatingOccupancyFraction, -1, \ | |
1603 "Percentage CMS generation occupancy to start a CMS collection " \ | |
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1604 " cycle (A negative value means that CMSTriggerRatio is used)") \ |
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1605 \ |
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1606 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ |
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1607 "Percentage CMS perm generation occupancy to start a CMScollection"\ |
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1608 " cycle (A negative value means that CMSTriggerPermRatio is used)")\ |
0 | 1609 \ |
1610 product(bool, UseCMSInitiatingOccupancyOnly, false, \ | |
1611 "Only use occupancy as a crierion for starting a CMS collection") \ | |
1612 \ | |
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1613 product(intx, CMSIsTooFullPercentage, 98, \ |
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1614 "An absolute ceiling above which CMS will always consider the" \ |
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1615 " perm gen ripe for collection") \ |
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1616 \ |
0 | 1617 develop(bool, CMSTestInFreeList, false, \ |
1618 "Check if the coalesced range is already in the " \ | |
1619 "free lists as claimed.") \ | |
1620 \ | |
1621 notproduct(bool, CMSVerifyReturnedBytes, false, \ | |
1622 "Check that all the garbage collected was returned to the " \ | |
1623 "free lists.") \ | |
1624 \ | |
1625 notproduct(bool, ScavengeALot, false, \ | |
1626 "Force scavenge at every Nth exit from the runtime system " \ | |
1627 "(N=ScavengeALotInterval)") \ | |
1628 \ | |
1629 develop(bool, FullGCALot, false, \ | |
1630 "Force full gc at every Nth exit from the runtime system " \ | |
1631 "(N=FullGCALotInterval)") \ | |
1632 \ | |
1633 notproduct(bool, GCALotAtAllSafepoints, false, \ | |
1634 "Enforce ScavengeALot/GCALot at all potential safepoints") \ | |
1635 \ | |
1636 product(bool, HandlePromotionFailure, true, \ | |
1637 "The youngest generation collection does not require" \ | |
1638 " a guarantee of full promotion of all live objects.") \ | |
1639 \ | |
1640 notproduct(bool, PromotionFailureALot, false, \ | |
1641 "Use promotion failure handling on every youngest generation " \ | |
1642 "collection") \ | |
1643 \ | |
1644 develop(uintx, PromotionFailureALotCount, 1000, \ | |
1645 "Number of promotion failures occurring at ParGCAllocBuffer" \ | |
1646 "refill attempts (ParNew) or promotion attempts " \ | |
1647 "(other young collectors) ") \ | |
1648 \ | |
1649 develop(uintx, PromotionFailureALotInterval, 5, \ | |
1650 "Total collections between promotion failures alot") \ | |
1651 \ | |
1652 develop(intx, WorkStealingSleepMillis, 1, \ | |
1653 "Sleep time when sleep is used for yields") \ | |
1654 \ | |
1655 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ | |
1656 "Number of yields before a sleep is done during workstealing") \ | |
1657 \ | |
534 | 1658 product(uintx, PreserveMarkStackSize, 1024, \ |
0 | 1659 "Size for stack used in promotion failure handling") \ |
1660 \ | |
1661 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ | |
1662 \ | |
1663 product_pd(bool, ResizeTLAB, \ | |
1664 "Dynamically resize tlab size for threads") \ | |
1665 \ | |
1666 product(bool, ZeroTLAB, false, \ | |
1667 "Zero out the newly created TLAB") \ | |
1668 \ | |
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1669 product(bool, FastTLABRefill, true, \ |
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1670 "Use fast TLAB refill code") \ |
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1671 \ |
0 | 1672 product(bool, PrintTLAB, false, \ |
1673 "Print various TLAB related information") \ | |
1674 \ | |
1675 product(bool, TLABStats, true, \ | |
1676 "Print various TLAB related information") \ | |
1677 \ | |
1678 product_pd(bool, NeverActAsServerClassMachine, \ | |
1679 "Never act like a server-class machine") \ | |
1680 \ | |
1681 product(bool, AlwaysActAsServerClassMachine, false, \ | |
1682 "Always act like a server-class machine") \ | |
1683 \ | |
1684 product_pd(uintx, DefaultMaxRAM, \ | |
1685 "Maximum real memory size for setting server class heap size") \ | |
1686 \ | |
1687 product(uintx, DefaultMaxRAMFraction, 4, \ | |
1688 "Fraction (1/n) of real memory used for server class max heap") \ | |
1689 \ | |
1690 product(uintx, DefaultInitialRAMFraction, 64, \ | |
1691 "Fraction (1/n) of real memory used for server class initial heap") \ | |
1692 \ | |
1693 product(bool, UseAutoGCSelectPolicy, false, \ | |
1694 "Use automatic collection selection policy") \ | |
1695 \ | |
1696 product(uintx, AutoGCSelectPauseMillis, 5000, \ | |
1697 "Automatic GC selection pause threshhold in ms") \ | |
1698 \ | |
1699 product(bool, UseAdaptiveSizePolicy, true, \ | |
1700 "Use adaptive generation sizing policies") \ | |
1701 \ | |
1702 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ | |
1703 "Use adaptive survivor sizing policies") \ | |
1704 \ | |
1705 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ | |
1706 "Use adaptive young-old sizing policies at minor collections") \ | |
1707 \ | |
1708 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ | |
1709 "Use adaptive young-old sizing policies at major collections") \ | |
1710 \ | |
1711 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ | |
1712 "Use statistics from System.GC for adaptive size policy") \ | |
1713 \ | |
1714 product(bool, UseAdaptiveGCBoundary, false, \ | |
1715 "Allow young-old boundary to move") \ | |
1716 \ | |
1717 develop(bool, TraceAdaptiveGCBoundary, false, \ | |
1718 "Trace young-old boundary moves") \ | |
1719 \ | |
1720 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ | |
1721 "Resize the virtual spaces of the young or old generations") \ | |
1722 \ | |
1723 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ | |
1724 "Policy for changeing generation size for throughput goals") \ | |
1725 \ | |
1726 product(uintx, AdaptiveSizePausePolicy, 0, \ | |
1727 "Policy for changing generation size for pause goals") \ | |
1728 \ | |
1729 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ | |
1730 "Adjust tenured generation to achive a minor pause goal") \ | |
1731 \ | |
1732 develop(bool, PSAdjustYoungGenForMajorPause, false, \ | |
1733 "Adjust young generation to achive a major pause goal") \ | |
1734 \ | |
1735 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ | |
1736 "Number of steps where heuristics is used before data is used") \ | |
1737 \ | |
1738 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ | |
1739 "Number of collections before the adaptive sizing is started") \ | |
1740 \ | |
1741 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ | |
1742 "Collecton interval for printing information, zero => never") \ | |
1743 \ | |
1744 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ | |
1745 "Use adaptive minimum footprint as a goal") \ | |
1746 \ | |
1747 product(uintx, AdaptiveSizePolicyWeight, 10, \ | |
1748 "Weight given to exponential resizing, between 0 and 100") \ | |
1749 \ | |
1750 product(uintx, AdaptiveTimeWeight, 25, \ | |
1751 "Weight given to time in adaptive policy, between 0 and 100") \ | |
1752 \ | |
1753 product(uintx, PausePadding, 1, \ | |
1754 "How much buffer to keep for pause time") \ | |
1755 \ | |
1756 product(uintx, PromotedPadding, 3, \ | |
1757 "How much buffer to keep for promotion failure") \ | |
1758 \ | |
1759 product(uintx, SurvivorPadding, 3, \ | |
1760 "How much buffer to keep for survivor overflow") \ | |
1761 \ | |
1762 product(uintx, AdaptivePermSizeWeight, 20, \ | |
1763 "Weight for perm gen exponential resizing, between 0 and 100") \ | |
1764 \ | |
1765 product(uintx, PermGenPadding, 3, \ | |
1766 "How much buffer to keep for perm gen sizing") \ | |
1767 \ | |
1768 product(uintx, ThresholdTolerance, 10, \ | |
1769 "Allowed collection cost difference between generations") \ | |
1770 \ | |
1771 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ | |
1772 "If collection costs are within margin, reduce both by full delta") \ | |
1773 \ | |
1774 product(uintx, YoungGenerationSizeIncrement, 20, \ | |
1775 "Adaptive size percentage change in young generation") \ | |
1776 \ | |
1777 product(uintx, YoungGenerationSizeSupplement, 80, \ | |
1778 "Supplement to YoungedGenerationSizeIncrement used at startup") \ | |
1779 \ | |
1780 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ | |
1781 "Decay factor to YoungedGenerationSizeSupplement") \ | |
1782 \ | |
1783 product(uintx, TenuredGenerationSizeIncrement, 20, \ | |
1784 "Adaptive size percentage change in tenured generation") \ | |
1785 \ | |
1786 product(uintx, TenuredGenerationSizeSupplement, 80, \ | |
1787 "Supplement to TenuredGenerationSizeIncrement used at startup") \ | |
1788 \ | |
1789 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ | |
1790 "Decay factor to TenuredGenerationSizeIncrement") \ | |
1791 \ | |
1792 product(uintx, MaxGCPauseMillis, max_uintx, \ | |
1793 "Adaptive size policy maximum GC pause time goal in msec") \ | |
1794 \ | |
1795 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ | |
1796 "Adaptive size policy maximum GC minor pause time goal in msec") \ | |
1797 \ | |
1798 product(uintx, GCTimeRatio, 99, \ | |
1799 "Adaptive size policy application time to GC time ratio") \ | |
1800 \ | |
1801 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ | |
1802 "Adaptive size scale down factor for shrinking") \ | |
1803 \ | |
1804 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ | |
1805 "Adaptive size decays the major cost for long major intervals") \ | |
1806 \ | |
1807 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ | |
1808 "Time scale over which major costs decay") \ | |
1809 \ | |
1810 product(uintx, MinSurvivorRatio, 3, \ | |
1811 "Minimum ratio of young generation/survivor space size") \ | |
1812 \ | |
1813 product(uintx, InitialSurvivorRatio, 8, \ | |
1814 "Initial ratio of eden/survivor space size") \ | |
1815 \ | |
1816 product(uintx, BaseFootPrintEstimate, 256*M, \ | |
1817 "Estimate of footprint other than Java Heap") \ | |
1818 \ | |
1819 product(bool, UseGCOverheadLimit, true, \ | |
1820 "Use policy to limit of proportion of time spent in GC " \ | |
1821 "before an OutOfMemory error is thrown") \ | |
1822 \ | |
1823 product(uintx, GCTimeLimit, 98, \ | |
1824 "Limit of proportion of time spent in GC before an OutOfMemory" \ | |
1825 "error is thrown (used with GCHeapFreeLimit)") \ | |
1826 \ | |
1827 product(uintx, GCHeapFreeLimit, 2, \ | |
1828 "Minimum percentage of free space after a full GC before an " \ | |
1829 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ | |
1830 \ | |
1831 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ | |
1832 "Number of consecutive collections before gc time limit fires") \ | |
1833 \ | |
1834 product(bool, PrintAdaptiveSizePolicy, false, \ | |
1835 "Print information about AdaptiveSizePolicy") \ | |
1836 \ | |
1837 product(intx, PrefetchCopyIntervalInBytes, -1, \ | |
1838 "How far ahead to prefetch destination area (<= 0 means off)") \ | |
1839 \ | |
1840 product(intx, PrefetchScanIntervalInBytes, -1, \ | |
1841 "How far ahead to prefetch scan area (<= 0 means off)") \ | |
1842 \ | |
1843 product(intx, PrefetchFieldsAhead, -1, \ | |
1844 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ | |
1845 \ | |
1846 develop(bool, UsePrefetchQueue, true, \ | |
1847 "Use the prefetch queue during PS promotion") \ | |
1848 \ | |
1849 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ | |
1850 "Verify system before exiting") \ | |
1851 \ | |
1852 diagnostic(bool, VerifyBeforeGC, false, \ | |
1853 "Verify memory system before GC") \ | |
1854 \ | |
1855 diagnostic(bool, VerifyAfterGC, false, \ | |
1856 "Verify memory system after GC") \ | |
1857 \ | |
1858 diagnostic(bool, VerifyDuringGC, false, \ | |
1859 "Verify memory system during GC (between phases)") \ | |
1860 \ | |
390 | 1861 diagnostic(bool, GCParallelVerificationEnabled, true, \ |
1862 "Enable parallel memory system verification") \ | |
1863 \ | |
0 | 1864 diagnostic(bool, VerifyRememberedSets, false, \ |
1865 "Verify GC remembered sets") \ | |
1866 \ | |
1867 diagnostic(bool, VerifyObjectStartArray, true, \ | |
1868 "Verify GC object start array if verify before/after") \ | |
1869 \ | |
1870 product(bool, DisableExplicitGC, false, \ | |
1871 "Tells whether calling System.gc() does a full GC") \ | |
1872 \ | |
1873 notproduct(bool, CheckMemoryInitialization, false, \ | |
1874 "Checks memory initialization") \ | |
1875 \ | |
1876 product(bool, CollectGen0First, false, \ | |
1877 "Collect youngest generation before each full GC") \ | |
1878 \ | |
1879 diagnostic(bool, BindCMSThreadToCPU, false, \ | |
1880 "Bind CMS Thread to CPU if possible") \ | |
1881 \ | |
1882 diagnostic(uintx, CPUForCMSThread, 0, \ | |
1883 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ | |
1884 \ | |
1885 product(bool, BindGCTaskThreadsToCPUs, false, \ | |
1886 "Bind GCTaskThreads to CPUs if possible") \ | |
1887 \ | |
1888 product(bool, UseGCTaskAffinity, false, \ | |
1889 "Use worker affinity when asking for GCTasks") \ | |
1890 \ | |
1891 product(uintx, ProcessDistributionStride, 4, \ | |
1892 "Stride through processors when distributing processes") \ | |
1893 \ | |
1894 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ | |
1895 "number of times the coordinator GC thread will sleep while " \ | |
1896 "yielding before giving up and resuming GC") \ | |
1897 \ | |
1898 product(uintx, CMSYieldSleepCount, 0, \ | |
1899 "number of times a GC thread (minus the coordinator) " \ | |
1900 "will sleep while yielding before giving up and resuming GC") \ | |
1901 \ | |
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1902 notproduct(bool, PrintFlagsFinal, false, \ |
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1903 "Print all command line flags after argument processing") \ |
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1904 \ |
0 | 1905 /* gc tracing */ \ |
1906 manageable(bool, PrintGC, false, \ | |
1907 "Print message at garbage collect") \ | |
1908 \ | |
1909 manageable(bool, PrintGCDetails, false, \ | |
1910 "Print more details at garbage collect") \ | |
1911 \ | |
1912 manageable(bool, PrintGCDateStamps, false, \ | |
1913 "Print date stamps at garbage collect") \ | |
1914 \ | |
1915 manageable(bool, PrintGCTimeStamps, false, \ | |
1916 "Print timestamps at garbage collect") \ | |
1917 \ | |
1918 product(bool, PrintGCTaskTimeStamps, false, \ | |
1919 "Print timestamps for individual gc worker thread tasks") \ | |
1920 \ | |
1921 develop(intx, ConcGCYieldTimeout, 0, \ | |
1922 "If non-zero, assert that GC threads yield within this # of ms.") \ | |
1923 \ | |
1924 notproduct(bool, TraceMarkSweep, false, \ | |
1925 "Trace mark sweep") \ | |
1926 \ | |
1927 product(bool, PrintReferenceGC, false, \ | |
1928 "Print times spent handling reference objects during GC " \ | |
1929 " (enabled only when PrintGCDetails)") \ | |
1930 \ | |
1931 develop(bool, TraceReferenceGC, false, \ | |
1932 "Trace handling of soft/weak/final/phantom references") \ | |
1933 \ | |
1934 develop(bool, TraceFinalizerRegistration, false, \ | |
1935 "Trace registration of final references") \ | |
1936 \ | |
1937 notproduct(bool, TraceScavenge, false, \ | |
1938 "Trace scavenge") \ | |
1939 \ | |
1940 product_rw(bool, TraceClassLoading, false, \ | |
1941 "Trace all classes loaded") \ | |
1942 \ | |
1943 product(bool, TraceClassLoadingPreorder, false, \ | |
1944 "Trace all classes loaded in order referenced (not loaded)") \ | |
1945 \ | |
1946 product_rw(bool, TraceClassUnloading, false, \ | |
1947 "Trace unloading of classes") \ | |
1948 \ | |
1949 product_rw(bool, TraceLoaderConstraints, false, \ | |
1950 "Trace loader constraints") \ | |
1951 \ | |
1952 product(bool, TraceGen0Time, false, \ | |
1953 "Trace accumulated time for Gen 0 collection") \ | |
1954 \ | |
1955 product(bool, TraceGen1Time, false, \ | |
1956 "Trace accumulated time for Gen 1 collection") \ | |
1957 \ | |
1958 product(bool, PrintTenuringDistribution, false, \ | |
1959 "Print tenuring age information") \ | |
1960 \ | |
1961 product_rw(bool, PrintHeapAtGC, false, \ | |
1962 "Print heap layout before and after each GC") \ | |
1963 \ | |
1964 product(bool, PrintHeapAtSIGBREAK, true, \ | |
1965 "Print heap layout in response to SIGBREAK") \ | |
1966 \ | |
1967 manageable(bool, PrintClassHistogram, false, \ | |
1968 "Print a histogram of class instances") \ | |
1969 \ | |
1970 develop(bool, TraceWorkGang, false, \ | |
1971 "Trace activities of work gangs") \ | |
1972 \ | |
1973 product(bool, TraceParallelOldGCTasks, false, \ | |
1974 "Trace multithreaded GC activity") \ | |
1975 \ | |
1976 develop(bool, TraceBlockOffsetTable, false, \ | |
1977 "Print BlockOffsetTable maps") \ | |
1978 \ | |
1979 develop(bool, TraceCardTableModRefBS, false, \ | |
1980 "Print CardTableModRefBS maps") \ | |
1981 \ | |
1982 develop(bool, TraceGCTaskManager, false, \ | |
1983 "Trace actions of the GC task manager") \ | |
1984 \ | |
1985 develop(bool, TraceGCTaskQueue, false, \ | |
1986 "Trace actions of the GC task queues") \ | |
1987 \ | |
1988 develop(bool, TraceGCTaskThread, false, \ | |
1989 "Trace actions of the GC task threads") \ | |
1990 \ | |
1991 product(bool, PrintParallelOldGCPhaseTimes, false, \ | |
1992 "Print the time taken by each parallel old gc phase." \ | |
1993 "PrintGCDetails must also be enabled.") \ | |
1994 \ | |
1995 develop(bool, TraceParallelOldGCMarkingPhase, false, \ | |
1996 "Trace parallel old gc marking phase") \ | |
1997 \ | |
1998 develop(bool, TraceParallelOldGCSummaryPhase, false, \ | |
1999 "Trace parallel old gc summary phase") \ | |
2000 \ | |
2001 develop(bool, TraceParallelOldGCCompactionPhase, false, \ | |
2002 "Trace parallel old gc compaction phase") \ | |
2003 \ | |
2004 develop(bool, TraceParallelOldGCDensePrefix, false, \ | |
2005 "Trace parallel old gc dense prefix computation") \ | |
2006 \ | |
2007 develop(bool, IgnoreLibthreadGPFault, false, \ | |
2008 "Suppress workaround for libthread GP fault") \ | |
2009 \ | |
139
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2010 product(bool, PrintJNIGCStalls, false, \ |
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2011 "Print diagnostic message when GC is stalled" \ |
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2012 "by JNI critical section") \ |
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2013 \ |
0 | 2014 /* JVMTI heap profiling */ \ |
2015 \ | |
2016 diagnostic(bool, TraceJVMTIObjectTagging, false, \ | |
2017 "Trace JVMTI object tagging calls") \ | |
2018 \ | |
2019 diagnostic(bool, VerifyBeforeIteration, false, \ | |
2020 "Verify memory system before JVMTI iteration") \ | |
2021 \ | |
2022 /* compiler interface */ \ | |
2023 \ | |
2024 develop(bool, CIPrintCompilerName, false, \ | |
2025 "when CIPrint is active, print the name of the active compiler") \ | |
2026 \ | |
2027 develop(bool, CIPrintCompileQueue, false, \ | |
2028 "display the contents of the compile queue whenever a " \ | |
2029 "compilation is enqueued") \ | |
2030 \ | |
2031 develop(bool, CIPrintRequests, false, \ | |
2032 "display every request for compilation") \ | |
2033 \ | |
2034 product(bool, CITime, false, \ | |
2035 "collect timing information for compilation") \ | |
2036 \ | |
2037 develop(bool, CITimeEach, false, \ | |
2038 "display timing information after each successful compilation") \ | |
2039 \ | |
2040 develop(bool, CICountOSR, true, \ | |
2041 "use a separate counter when assigning ids to osr compilations") \ | |
2042 \ | |
2043 develop(bool, CICompileNatives, true, \ | |
2044 "compile native methods if supported by the compiler") \ | |
2045 \ | |
2046 develop_pd(bool, CICompileOSR, \ | |
2047 "compile on stack replacement methods if supported by the " \ | |
2048 "compiler") \ | |
2049 \ | |
2050 develop(bool, CIPrintMethodCodes, false, \ | |
2051 "print method bytecodes of the compiled code") \ | |
2052 \ | |
2053 develop(bool, CIPrintTypeFlow, false, \ | |
2054 "print the results of ciTypeFlow analysis") \ | |
2055 \ | |
2056 develop(bool, CITraceTypeFlow, false, \ | |
2057 "detailed per-bytecode tracing of ciTypeFlow analysis") \ | |
2058 \ | |
2059 develop(intx, CICloneLoopTestLimit, 100, \ | |
2060 "size limit for blocks heuristically cloned in ciTypeFlow") \ | |
2061 \ | |
2062 /* temp diagnostics */ \ | |
2063 \ | |
2064 diagnostic(bool, TraceRedundantCompiles, false, \ | |
2065 "Have compile broker print when a request already in the queue is"\ | |
2066 " requested again") \ | |
2067 \ | |
2068 diagnostic(bool, InitialCompileFast, false, \ | |
2069 "Initial compile at CompLevel_fast_compile") \ | |
2070 \ | |
2071 diagnostic(bool, InitialCompileReallyFast, false, \ | |
2072 "Initial compile at CompLevel_really_fast_compile (no profile)") \ | |
2073 \ | |
2074 diagnostic(bool, FullProfileOnReInterpret, true, \ | |
2075 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ | |
2076 \ | |
2077 /* compiler */ \ | |
2078 \ | |
2079 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ | |
2080 "Number of compiler threads to run") \ | |
2081 \ | |
2082 product(intx, CompilationPolicyChoice, 0, \ | |
2083 "which compilation policy (0/1)") \ | |
2084 \ | |
2085 develop(bool, UseStackBanging, true, \ | |
2086 "use stack banging for stack overflow checks (required for " \ | |
2087 "proper StackOverflow handling; disable only to measure cost " \ | |
2088 "of stackbanging)") \ | |
2089 \ | |
2090 develop(bool, Use24BitFPMode, true, \ | |
2091 "Set 24-bit FPU mode on a per-compile basis ") \ | |
2092 \ | |
2093 develop(bool, Use24BitFP, true, \ | |
2094 "use FP instructions that produce 24-bit precise results") \ | |
2095 \ | |
2096 develop(bool, UseStrictFP, true, \ | |
2097 "use strict fp if modifier strictfp is set") \ | |
2098 \ | |
2099 develop(bool, GenerateSynchronizationCode, true, \ | |
2100 "generate locking/unlocking code for synchronized methods and " \ | |
2101 "monitors") \ | |
2102 \ | |
2103 develop(bool, GenerateCompilerNullChecks, true, \ | |
2104 "Generate explicit null checks for loads/stores/calls") \ | |
2105 \ | |
2106 develop(bool, GenerateRangeChecks, true, \ | |
2107 "Generate range checks for array accesses") \ | |
2108 \ | |
2109 develop_pd(bool, ImplicitNullChecks, \ | |
2110 "generate code for implicit null checks") \ | |
2111 \ | |
2112 product(bool, PrintSafepointStatistics, false, \ | |
2113 "print statistics about safepoint synchronization") \ | |
2114 \ | |
2115 product(intx, PrintSafepointStatisticsCount, 300, \ | |
2116 "total number of safepoint statistics collected " \ | |
2117 "before printing them out") \ | |
2118 \ | |
2119 product(intx, PrintSafepointStatisticsTimeout, -1, \ | |
2120 "print safepoint statistics only when safepoint takes" \ | |
2121 " more than PrintSafepointSatisticsTimeout in millis") \ | |
2122 \ | |
2123 develop(bool, InlineAccessors, true, \ | |
2124 "inline accessor methods (get/set)") \ | |
2125 \ | |
2126 product(bool, Inline, true, \ | |
2127 "enable inlining") \ | |
2128 \ | |
2129 product(bool, ClipInlining, true, \ | |
2130 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ | |
2131 \ | |
2132 develop(bool, UseCHA, true, \ | |
2133 "enable CHA") \ | |
2134 \ | |
2135 product(bool, UseTypeProfile, true, \ | |
2136 "Check interpreter profile for historically monomorphic calls") \ | |
2137 \ | |
2138 product(intx, TypeProfileMajorReceiverPercent, 90, \ | |
2139 "% of major receiver type to all profiled receivers") \ | |
2140 \ | |
2141 notproduct(bool, TimeCompiler, false, \ | |
2142 "time the compiler") \ | |
2143 \ | |
2144 notproduct(bool, TimeCompiler2, false, \ | |
2145 "detailed time the compiler (requires +TimeCompiler)") \ | |
2146 \ | |
2147 diagnostic(bool, PrintInlining, false, \ | |
2148 "prints inlining optimizations") \ | |
2149 \ | |
2150 diagnostic(bool, PrintIntrinsics, false, \ | |
2151 "prints attempted and successful inlining of intrinsics") \ | |
2152 \ | |
2153 diagnostic(ccstrlist, DisableIntrinsic, "", \ | |
2154 "do not expand intrinsics whose (internal) names appear here") \ | |
2155 \ | |
2156 develop(bool, StressReflectiveCode, false, \ | |
2157 "Use inexact types at allocations, etc., to test reflection") \ | |
2158 \ | |
2159 develop(bool, EagerInitialization, false, \ | |
2160 "Eagerly initialize classes if possible") \ | |
2161 \ | |
2162 product(bool, Tier1UpdateMethodData, trueInTiered, \ | |
2163 "Update methodDataOops in Tier1-generated code") \ | |
2164 \ | |
2165 develop(bool, TraceMethodReplacement, false, \ | |
2166 "Print when methods are replaced do to recompilation") \ | |
2167 \ | |
2168 develop(bool, PrintMethodFlushing, false, \ | |
2169 "print the nmethods being flushed") \ | |
2170 \ | |
2171 notproduct(bool, LogMultipleMutexLocking, false, \ | |
2172 "log locking and unlocking of mutexes (only if multiple locks " \ | |
2173 "are held)") \ | |
2174 \ | |
2175 develop(bool, UseRelocIndex, false, \ | |
2176 "use an index to speed random access to relocations") \ | |
2177 \ | |
2178 develop(bool, StressCodeBuffers, false, \ | |
2179 "Exercise code buffer expansion and other rare state changes") \ | |
2180 \ | |
2181 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ | |
2182 "Generate extra debugging info for non-safepoints in nmethods") \ | |
2183 \ | |
2184 diagnostic(bool, DebugInlinedCalls, true, \ | |
2185 "If false, restricts profiled locations to the root method only") \ | |
2186 \ | |
2187 product(bool, PrintVMOptions, trueInDebug, \ | |
2188 "print VM flag settings") \ | |
2189 \ | |
2190 diagnostic(bool, SerializeVMOutput, true, \ | |
2191 "Use a mutex to serialize output to tty and hotspot.log") \ | |
2192 \ | |
2193 diagnostic(bool, DisplayVMOutput, true, \ | |
2194 "Display all VM output on the tty, independently of LogVMOutput") \ | |
2195 \ | |
2196 diagnostic(bool, LogVMOutput, trueInDebug, \ | |
2197 "Save VM output to hotspot.log, or to LogFile") \ | |
2198 \ | |
2199 diagnostic(ccstr, LogFile, NULL, \ | |
2200 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ | |
2201 \ | |
2202 product(ccstr, ErrorFile, NULL, \ | |
2203 "If an error occurs, save the error data to this file " \ | |
2204 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ | |
2205 \ | |
2206 product(bool, DisplayVMOutputToStderr, false, \ | |
2207 "If DisplayVMOutput is true, display all VM output to stderr") \ | |
2208 \ | |
2209 product(bool, DisplayVMOutputToStdout, false, \ | |
2210 "If DisplayVMOutput is true, display all VM output to stdout") \ | |
2211 \ | |
2212 product(bool, UseHeavyMonitors, false, \ | |
2213 "use heavyweight instead of lightweight Java monitors") \ | |
2214 \ | |
2215 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ | |
2216 "print histogram of the symbol table") \ | |
2217 \ | |
2218 notproduct(bool, ExitVMOnVerifyError, false, \ | |
2219 "standard exit from VM if bytecode verify error " \ | |
2220 "(only in debug mode)") \ | |
2221 \ | |
2222 notproduct(ccstr, AbortVMOnException, NULL, \ | |
2223 "Call fatal if this exception is thrown. Example: " \ | |
2224 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ | |
2225 \ | |
2226 develop(bool, DebugVtables, false, \ | |
2227 "add debugging code to vtable dispatch") \ | |
2228 \ | |
2229 develop(bool, PrintVtables, false, \ | |
2230 "print vtables when printing klass") \ | |
2231 \ | |
2232 notproduct(bool, PrintVtableStats, false, \ | |
2233 "print vtables stats at end of run") \ | |
2234 \ | |
2235 develop(bool, TraceCreateZombies, false, \ | |
2236 "trace creation of zombie nmethods") \ | |
2237 \ | |
2238 notproduct(bool, IgnoreLockingAssertions, false, \ | |
2239 "disable locking assertions (for speed)") \ | |
2240 \ | |
2241 notproduct(bool, VerifyLoopOptimizations, false, \ | |
2242 "verify major loop optimizations") \ | |
2243 \ | |
2244 product(bool, RangeCheckElimination, true, \ | |
2245 "Split loop iterations to eliminate range checks") \ | |
2246 \ | |
2247 develop_pd(bool, UncommonNullCast, \ | |
2248 "track occurrences of null in casts; adjust compiler tactics") \ | |
2249 \ | |
2250 develop(bool, TypeProfileCasts, true, \ | |
2251 "treat casts like calls for purposes of type profiling") \ | |
2252 \ | |
2253 develop(bool, MonomorphicArrayCheck, true, \ | |
2254 "Uncommon-trap array store checks that require full type check") \ | |
2255 \ | |
2256 develop(bool, DelayCompilationDuringStartup, true, \ | |
2257 "Delay invoking the compiler until main application class is " \ | |
2258 "loaded") \ | |
2259 \ | |
2260 develop(bool, CompileTheWorld, false, \ | |
2261 "Compile all methods in all classes in bootstrap class path " \ | |
2262 "(stress test)") \ | |
2263 \ | |
2264 develop(bool, CompileTheWorldPreloadClasses, true, \ | |
2265 "Preload all classes used by a class before start loading") \ | |
2266 \ | |
2267 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ | |
2268 "Compile all methods although class initializer failed") \ | |
2269 \ | |
2270 develop(bool, TraceIterativeGVN, false, \ | |
2271 "Print progress during Iterative Global Value Numbering") \ | |
2272 \ | |
2273 develop(bool, FillDelaySlots, true, \ | |
2274 "Fill delay slots (on SPARC only)") \ | |
2275 \ | |
2276 develop(bool, VerifyIterativeGVN, false, \ | |
2277 "Verify Def-Use modifications during sparse Iterative Global " \ | |
2278 "Value Numbering") \ | |
2279 \ | |
2280 notproduct(bool, TracePhaseCCP, false, \ | |
2281 "Print progress during Conditional Constant Propagation") \ | |
2282 \ | |
2283 develop(bool, TimeLivenessAnalysis, false, \ | |
2284 "Time computation of bytecode liveness analysis") \ | |
2285 \ | |
2286 develop(bool, TraceLivenessGen, false, \ | |
2287 "Trace the generation of liveness analysis information") \ | |
2288 \ | |
2289 notproduct(bool, TraceLivenessQuery, false, \ | |
2290 "Trace queries of liveness analysis information") \ | |
2291 \ | |
2292 notproduct(bool, CollectIndexSetStatistics, false, \ | |
2293 "Collect information about IndexSets") \ | |
2294 \ | |
2295 develop(bool, PrintDominators, false, \ | |
2296 "Print out dominator trees for GVN") \ | |
2297 \ | |
2298 develop(bool, UseLoopSafepoints, true, \ | |
2299 "Generate Safepoint nodes in every loop") \ | |
2300 \ | |
2301 notproduct(bool, TraceCISCSpill, false, \ | |
2302 "Trace allocators use of cisc spillable instructions") \ | |
2303 \ | |
2304 notproduct(bool, TraceSpilling, false, \ | |
2305 "Trace spilling") \ | |
2306 \ | |
2307 develop(bool, DeutschShiffmanExceptions, true, \ | |
2308 "Fast check to find exception handler for precisely typed " \ | |
2309 "exceptions") \ | |
2310 \ | |
2311 product(bool, SplitIfBlocks, true, \ | |
2312 "Clone compares and control flow through merge points to fold " \ | |
2313 "some branches") \ | |
2314 \ | |
2315 develop(intx, FastAllocateSizeLimit, 128*K, \ | |
2316 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ | |
2317 "Inline allocations larger than this in doublewords must go slow")\ | |
2318 \ | |
2319 product(bool, AggressiveOpts, false, \ | |
2320 "Enable aggressive optimizations - see arguments.cpp") \ | |
2321 \ | |
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2322 product(bool, UseStringCache, false, \ |
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2323 "Enable String cache capabilities on String.java") \ |
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2324 \ |
0 | 2325 /* statistics */ \ |
2326 develop(bool, UseVTune, false, \ | |
2327 "enable support for Intel's VTune profiler") \ | |
2328 \ | |
2329 develop(bool, CountCompiledCalls, false, \ | |
2330 "counts method invocations") \ | |
2331 \ | |
2332 notproduct(bool, CountRuntimeCalls, false, \ | |
2333 "counts VM runtime calls") \ | |
2334 \ | |
2335 develop(bool, CountJNICalls, false, \ | |
2336 "counts jni method invocations") \ | |
2337 \ | |
2338 notproduct(bool, CountJVMCalls, false, \ | |
2339 "counts jvm method invocations") \ | |
2340 \ | |
2341 notproduct(bool, CountRemovableExceptions, false, \ | |
2342 "count exceptions that could be replaced by branches due to " \ | |
2343 "inlining") \ | |
2344 \ | |
2345 notproduct(bool, ICMissHistogram, false, \ | |
2346 "produce histogram of IC misses") \ | |
2347 \ | |
2348 notproduct(bool, PrintClassStatistics, false, \ | |
2349 "prints class statistics at end of run") \ | |
2350 \ | |
2351 notproduct(bool, PrintMethodStatistics, false, \ | |
2352 "prints method statistics at end of run") \ | |
2353 \ | |
2354 /* interpreter */ \ | |
2355 develop(bool, ClearInterpreterLocals, false, \ | |
2356 "Always clear local variables of interpreter activations upon " \ | |
2357 "entry") \ | |
2358 \ | |
2359 product_pd(bool, RewriteBytecodes, \ | |
2360 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ | |
2361 \ | |
2362 product_pd(bool, RewriteFrequentPairs, \ | |
2363 "Rewrite frequently used bytecode pairs into a single bytecode") \ | |
2364 \ | |
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2365 diagnostic(bool, PrintInterpreter, false, \ |
0 | 2366 "Prints the generated interpreter code") \ |
2367 \ | |
2368 product(bool, UseInterpreter, true, \ | |
2369 "Use interpreter for non-compiled methods") \ | |
2370 \ | |
2371 develop(bool, UseFastSignatureHandlers, true, \ | |
2372 "Use fast signature handlers for native calls") \ | |
2373 \ | |
2374 develop(bool, UseV8InstrsOnly, false, \ | |
2375 "Use SPARC-V8 Compliant instruction subset") \ | |
2376 \ | |
2377 product(bool, UseNiagaraInstrs, false, \ | |
2378 "Use Niagara-efficient instruction subset") \ | |
2379 \ | |
2380 develop(bool, UseCASForSwap, false, \ | |
2381 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ | |
2382 \ | |
2383 product(bool, UseLoopCounter, true, \ | |
2384 "Increment invocation counter on backward branch") \ | |
2385 \ | |
2386 product(bool, UseFastEmptyMethods, true, \ | |
2387 "Use fast method entry code for empty methods") \ | |
2388 \ | |
2389 product(bool, UseFastAccessorMethods, true, \ | |
2390 "Use fast method entry code for accessor methods") \ | |
2391 \ | |
2392 product_pd(bool, UseOnStackReplacement, \ | |
2393 "Use on stack replacement, calls runtime if invoc. counter " \ | |
2394 "overflows in loop") \ | |
2395 \ | |
2396 notproduct(bool, TraceOnStackReplacement, false, \ | |
2397 "Trace on stack replacement") \ | |
2398 \ | |
2399 develop(bool, PoisonOSREntry, true, \ | |
2400 "Detect abnormal calls to OSR code") \ | |
2401 \ | |
2402 product_pd(bool, PreferInterpreterNativeStubs, \ | |
2403 "Use always interpreter stubs for native methods invoked via " \ | |
2404 "interpreter") \ | |
2405 \ | |
2406 develop(bool, CountBytecodes, false, \ | |
2407 "Count number of bytecodes executed") \ | |
2408 \ | |
2409 develop(bool, PrintBytecodeHistogram, false, \ | |
2410 "Print histogram of the executed bytecodes") \ | |
2411 \ | |
2412 develop(bool, PrintBytecodePairHistogram, false, \ | |
2413 "Print histogram of the executed bytecode pairs") \ | |
2414 \ | |
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2415 diagnostic(bool, PrintSignatureHandlers, false, \ |
0 | 2416 "Print code generated for native method signature handlers") \ |
2417 \ | |
2418 develop(bool, VerifyOops, false, \ | |
2419 "Do plausibility checks for oops") \ | |
2420 \ | |
2421 develop(bool, CheckUnhandledOops, false, \ | |
2422 "Check for unhandled oops in VM code") \ | |
2423 \ | |
2424 develop(bool, VerifyJNIFields, trueInDebug, \ | |
2425 "Verify jfieldIDs for instance fields") \ | |
2426 \ | |
2427 notproduct(bool, VerifyJNIEnvThread, false, \ | |
2428 "Verify JNIEnv.thread == Thread::current() when entering VM " \ | |
2429 "from JNI") \ | |
2430 \ | |
2431 develop(bool, VerifyFPU, false, \ | |
2432 "Verify FPU state (check for NaN's, etc.)") \ | |
2433 \ | |
2434 develop(bool, VerifyThread, false, \ | |
2435 "Watch the thread register for corruption (SPARC only)") \ | |
2436 \ | |
2437 develop(bool, VerifyActivationFrameSize, false, \ | |
2438 "Verify that activation frame didn't become smaller than its " \ | |
2439 "minimal size") \ | |
2440 \ | |
2441 develop(bool, TraceFrequencyInlining, false, \ | |
2442 "Trace frequency based inlining") \ | |
2443 \ | |
2444 notproduct(bool, TraceTypeProfile, false, \ | |
2445 "Trace type profile") \ | |
2446 \ | |
2447 develop_pd(bool, InlineIntrinsics, \ | |
2448 "Inline intrinsics that can be statically resolved") \ | |
2449 \ | |
2450 product_pd(bool, ProfileInterpreter, \ | |
2451 "Profile at the bytecode level during interpretation") \ | |
2452 \ | |
2453 develop_pd(bool, ProfileTraps, \ | |
2454 "Profile deoptimization traps at the bytecode level") \ | |
2455 \ | |
2456 product(intx, ProfileMaturityPercentage, 20, \ | |
2457 "number of method invocations/branches (expressed as % of " \ | |
2458 "CompileThreshold) before using the method's profile") \ | |
2459 \ | |
2460 develop(bool, PrintMethodData, false, \ | |
2461 "Print the results of +ProfileInterpreter at end of run") \ | |
2462 \ | |
2463 develop(bool, VerifyDataPointer, trueInDebug, \ | |
2464 "Verify the method data pointer during interpreter profiling") \ | |
2465 \ | |
2466 develop(bool, VerifyCompiledCode, false, \ | |
2467 "Include miscellaneous runtime verifications in nmethod code; " \ | |
2468 "off by default because it disturbs nmethod size heuristics.") \ | |
2469 \ | |
2470 \ | |
2471 /* compilation */ \ | |
2472 product(bool, UseCompiler, true, \ | |
2473 "use compilation") \ | |
2474 \ | |
2475 develop(bool, TraceCompilationPolicy, false, \ | |
2476 "Trace compilation policy") \ | |
2477 \ | |
2478 develop(bool, TimeCompilationPolicy, false, \ | |
2479 "Time the compilation policy") \ | |
2480 \ | |
2481 product(bool, UseCounterDecay, true, \ | |
2482 "adjust recompilation counters") \ | |
2483 \ | |
2484 develop(intx, CounterHalfLifeTime, 30, \ | |
2485 "half-life time of invocation counters (in secs)") \ | |
2486 \ | |
2487 develop(intx, CounterDecayMinIntervalLength, 500, \ | |
2488 "Min. ms. between invocation of CounterDecay") \ | |
2489 \ | |
2490 product(bool, AlwaysCompileLoopMethods, false, \ | |
2491 "when using recompilation, never interpret methods " \ | |
2492 "containing loops") \ | |
2493 \ | |
2494 product(bool, DontCompileHugeMethods, true, \ | |
2495 "don't compile methods > HugeMethodLimit") \ | |
2496 \ | |
2497 /* Bytecode escape analysis estimation. */ \ | |
2498 product(bool, EstimateArgEscape, true, \ | |
2499 "Analyze bytecodes to estimate escape state of arguments") \ | |
2500 \ | |
2501 product(intx, BCEATraceLevel, 0, \ | |
2502 "How much tracing to do of bytecode escape analysis estimates") \ | |
2503 \ | |
2504 product(intx, MaxBCEAEstimateLevel, 5, \ | |
2505 "Maximum number of nested calls that are analyzed by BC EA.") \ | |
2506 \ | |
2507 product(intx, MaxBCEAEstimateSize, 150, \ | |
2508 "Maximum bytecode size of a method to be analyzed by BC EA.") \ | |
2509 \ | |
2510 product(intx, AllocatePrefetchStyle, 1, \ | |
2511 "0 = no prefetch, " \ | |
2512 "1 = prefetch instructions for each allocation, " \ | |
2513 "2 = use TLAB watermark to gate allocation prefetch") \ | |
2514 \ | |
2515 product(intx, AllocatePrefetchDistance, -1, \ | |
2516 "Distance to prefetch ahead of allocation pointer") \ | |
2517 \ | |
2518 product(intx, AllocatePrefetchLines, 1, \ | |
2519 "Number of lines to prefetch ahead of allocation pointer") \ | |
2520 \ | |
2521 product(intx, AllocatePrefetchStepSize, 16, \ | |
2522 "Step size in bytes of sequential prefetch instructions") \ | |
2523 \ | |
2524 product(intx, AllocatePrefetchInstr, 0, \ | |
2525 "Prefetch instruction to prefetch ahead of allocation pointer") \ | |
2526 \ | |
2527 product(intx, ReadPrefetchInstr, 0, \ | |
2528 "Prefetch instruction to prefetch ahead") \ | |
2529 \ | |
2530 /* deoptimization */ \ | |
2531 develop(bool, TraceDeoptimization, false, \ | |
2532 "Trace deoptimization") \ | |
2533 \ | |
2534 develop(bool, DebugDeoptimization, false, \ | |
2535 "Tracing various information while debugging deoptimization") \ | |
2536 \ | |
2537 product(intx, SelfDestructTimer, 0, \ | |
2538 "Will cause VM to terminate after a given time (in minutes) " \ | |
2539 "(0 means off)") \ | |
2540 \ | |
2541 product(intx, MaxJavaStackTraceDepth, 1024, \ | |
2542 "Max. no. of lines in the stack trace for Java exceptions " \ | |
2543 "(0 means all)") \ | |
2544 \ | |
2545 develop(intx, GuaranteedSafepointInterval, 1000, \ | |
2546 "Guarantee a safepoint (at least) every so many milliseconds " \ | |
2547 "(0 means none)") \ | |
2548 \ | |
2549 product(intx, SafepointTimeoutDelay, 10000, \ | |
2550 "Delay in milliseconds for option SafepointTimeout") \ | |
2551 \ | |
2552 product(intx, NmethodSweepFraction, 4, \ | |
2553 "Number of invocations of sweeper to cover all nmethods") \ | |
2554 \ | |
2555 notproduct(intx, MemProfilingInterval, 500, \ | |
2556 "Time between each invocation of the MemProfiler") \ | |
2557 \ | |
2558 develop(intx, MallocCatchPtr, -1, \ | |
2559 "Hit breakpoint when mallocing/freeing this pointer") \ | |
2560 \ | |
2561 notproduct(intx, AssertRepeat, 1, \ | |
2562 "number of times to evaluate expression in assert " \ | |
2563 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ | |
2564 \ | |
2565 notproduct(ccstrlist, SuppressErrorAt, "", \ | |
2566 "List of assertions (file:line) to muzzle") \ | |
2567 \ | |
2568 notproduct(uintx, HandleAllocationLimit, 1024, \ | |
2569 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ | |
2570 "is used") \ | |
2571 \ | |
2572 develop(uintx, TotalHandleAllocationLimit, 1024, \ | |
2573 "Threshold for total handle allocation when " \ | |
2574 "+TraceHandleAllocation is used") \ | |
2575 \ | |
2576 develop(intx, StackPrintLimit, 100, \ | |
2577 "number of stack frames to print in VM-level stack dump") \ | |
2578 \ | |
2579 notproduct(intx, MaxElementPrintSize, 256, \ | |
2580 "maximum number of elements to print") \ | |
2581 \ | |
2582 notproduct(intx, MaxSubklassPrintSize, 4, \ | |
2583 "maximum number of subklasses to print when printing klass") \ | |
2584 \ | |
2585 develop(intx, MaxInlineLevel, 9, \ | |
2586 "maximum number of nested calls that are inlined") \ | |
2587 \ | |
2588 develop(intx, MaxRecursiveInlineLevel, 1, \ | |
2589 "maximum number of nested recursive calls that are inlined") \ | |
2590 \ | |
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2591 product(intx, InlineSmallCode, 1000, \ |
0 | 2592 "Only inline already compiled methods if their code size is " \ |
2593 "less than this") \ | |
2594 \ | |
2595 product(intx, MaxInlineSize, 35, \ | |
2596 "maximum bytecode size of a method to be inlined") \ | |
2597 \ | |
2598 product_pd(intx, FreqInlineSize, \ | |
2599 "maximum bytecode size of a frequent method to be inlined") \ | |
2600 \ | |
2601 develop(intx, MaxTrivialSize, 6, \ | |
2602 "maximum bytecode size of a trivial method to be inlined") \ | |
2603 \ | |
2604 develop(intx, MinInliningThreshold, 250, \ | |
2605 "min. invocation count a method needs to have to be inlined") \ | |
2606 \ | |
2607 develop(intx, AlignEntryCode, 4, \ | |
2608 "aligns entry code to specified value (in bytes)") \ | |
2609 \ | |
2610 develop(intx, MethodHistogramCutoff, 100, \ | |
2611 "cutoff value for method invoc. histogram (+CountCalls)") \ | |
2612 \ | |
2613 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ | |
2614 "# of interpreted methods to show in profile") \ | |
2615 \ | |
2616 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ | |
2617 "# of compiled methods to show in profile") \ | |
2618 \ | |
2619 develop(intx, ProfilerNumberOfStubMethods, 25, \ | |
2620 "# of stub methods to show in profile") \ | |
2621 \ | |
2622 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ | |
2623 "# of runtime stub nodes to show in profile") \ | |
2624 \ | |
2625 product(intx, ProfileIntervalsTicks, 100, \ | |
2626 "# of ticks between printing of interval profile " \ | |
2627 "(+ProfileIntervals)") \ | |
2628 \ | |
2629 notproduct(intx, ScavengeALotInterval, 1, \ | |
2630 "Interval between which scavenge will occur with +ScavengeALot") \ | |
2631 \ | |
2632 notproduct(intx, FullGCALotInterval, 1, \ | |
2633 "Interval between which full gc will occur with +FullGCALot") \ | |
2634 \ | |
2635 notproduct(intx, FullGCALotStart, 0, \ | |
2636 "For which invocation to start FullGCAlot") \ | |
2637 \ | |
2638 notproduct(intx, FullGCALotDummies, 32*K, \ | |
2639 "Dummy object allocated with +FullGCALot, forcing all objects " \ | |
2640 "to move") \ | |
2641 \ | |
2642 develop(intx, DontYieldALotInterval, 10, \ | |
2643 "Interval between which yields will be dropped (milliseconds)") \ | |
2644 \ | |
2645 develop(intx, MinSleepInterval, 1, \ | |
2646 "Minimum sleep() interval (milliseconds) when " \ | |
2647 "ConvertSleepToYield is off (used for SOLARIS)") \ | |
2648 \ | |
2649 product(intx, EventLogLength, 2000, \ | |
2650 "maximum nof events in event log") \ | |
2651 \ | |
2652 develop(intx, ProfilerPCTickThreshold, 15, \ | |
2653 "Number of ticks in a PC buckets to be a hotspot") \ | |
2654 \ | |
2655 notproduct(intx, DeoptimizeALotInterval, 5, \ | |
2656 "Number of exits until DeoptimizeALot kicks in") \ | |
2657 \ | |
2658 notproduct(intx, ZombieALotInterval, 5, \ | |
2659 "Number of exits until ZombieALot kicks in") \ | |
2660 \ | |
2661 develop(bool, StressNonEntrant, false, \ | |
2662 "Mark nmethods non-entrant at registration") \ | |
2663 \ | |
2664 diagnostic(intx, MallocVerifyInterval, 0, \ | |
2665 "if non-zero, verify C heap after every N calls to " \ | |
2666 "malloc/realloc/free") \ | |
2667 \ | |
2668 diagnostic(intx, MallocVerifyStart, 0, \ | |
2669 "if non-zero, start verifying C heap after Nth call to " \ | |
2670 "malloc/realloc/free") \ | |
2671 \ | |
2672 product(intx, TypeProfileWidth, 2, \ | |
2673 "number of receiver types to record in call/cast profile") \ | |
2674 \ | |
2675 develop(intx, BciProfileWidth, 2, \ | |
2676 "number of return bci's to record in ret profile") \ | |
2677 \ | |
2678 product(intx, PerMethodRecompilationCutoff, 400, \ | |
2679 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ | |
2680 \ | |
2681 product(intx, PerBytecodeRecompilationCutoff, 100, \ | |
2682 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ | |
2683 \ | |
2684 product(intx, PerMethodTrapLimit, 100, \ | |
2685 "Limit on traps (of one kind) in a method (includes inlines)") \ | |
2686 \ | |
2687 product(intx, PerBytecodeTrapLimit, 4, \ | |
2688 "Limit on traps (of one kind) at a particular BCI") \ | |
2689 \ | |
2690 develop(intx, FreqCountInvocations, 1, \ | |
2691 "Scaling factor for branch frequencies (deprecated)") \ | |
2692 \ | |
2693 develop(intx, InlineFrequencyRatio, 20, \ | |
2694 "Ratio of call site execution to caller method invocation") \ | |
2695 \ | |
2696 develop_pd(intx, InlineFrequencyCount, \ | |
2697 "Count of call site execution necessary to trigger frequent " \ | |
2698 "inlining") \ | |
2699 \ | |
2700 develop(intx, InlineThrowCount, 50, \ | |
2701 "Force inlining of interpreted methods that throw this often") \ | |
2702 \ | |
2703 develop(intx, InlineThrowMaxSize, 200, \ | |
2704 "Force inlining of throwing methods smaller than this") \ | |
2705 \ | |
2706 product(intx, AliasLevel, 3, \ | |
2707 "0 for no aliasing, 1 for oop/field/static/array split, " \ | |
2708 "2 for class split, 3 for unique instances") \ | |
2709 \ | |
2710 develop(bool, VerifyAliases, false, \ | |
2711 "perform extra checks on the results of alias analysis") \ | |
2712 \ | |
2713 develop(intx, ProfilerNodeSize, 1024, \ | |
2714 "Size in K to allocate for the Profile Nodes of each thread") \ | |
2715 \ | |
2716 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ | |
2717 "Number of times to spin wait on a v8 atomic operation lock") \ | |
2718 \ | |
2719 product(intx, ReadSpinIterations, 100, \ | |
2720 "Number of read attempts before a yield (spin inner loop)") \ | |
2721 \ | |
2722 product_pd(intx, PreInflateSpin, \ | |
2723 "Number of times to spin wait before inflation") \ | |
2724 \ | |
2725 product(intx, PreBlockSpin, 10, \ | |
2726 "Number of times to spin in an inflated lock before going to " \ | |
2727 "an OS lock") \ | |
2728 \ | |
2729 /* gc parameters */ \ | |
2730 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \ | |
2731 "Default maximum size for object heap (in bytes)") \ | |
2732 \ | |
2733 product_pd(uintx, NewSize, \ | |
2734 "Default size of new generation (in bytes)") \ | |
2735 \ | |
2736 product(uintx, MaxNewSize, max_uintx, \ | |
2737 "Maximum size of new generation (in bytes)") \ | |
2738 \ | |
2739 product(uintx, PretenureSizeThreshold, 0, \ | |
2740 "Max size in bytes of objects allocated in DefNew generation") \ | |
2741 \ | |
2742 product_pd(uintx, TLABSize, \ | |
2743 "Default (or starting) size of TLAB (in bytes)") \ | |
2744 \ | |
2745 product(uintx, MinTLABSize, 2*K, \ | |
2746 "Minimum allowed TLAB size (in bytes)") \ | |
2747 \ | |
2748 product(uintx, TLABAllocationWeight, 35, \ | |
2749 "Allocation averaging weight") \ | |
2750 \ | |
2751 product(uintx, TLABWasteTargetPercent, 1, \ | |
2752 "Percentage of Eden that can be wasted") \ | |
2753 \ | |
2754 product(uintx, TLABRefillWasteFraction, 64, \ | |
2755 "Max TLAB waste at a refill (internal fragmentation)") \ | |
2756 \ | |
2757 product(uintx, TLABWasteIncrement, 4, \ | |
2758 "Increment allowed waste at slow allocation") \ | |
2759 \ | |
2760 product_pd(intx, SurvivorRatio, \ | |
2761 "Ratio of eden/survivor space size") \ | |
2762 \ | |
2763 product_pd(intx, NewRatio, \ | |
2764 "Ratio of new/old generation sizes") \ | |
2765 \ | |
2766 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ | |
2767 "Max percent of eden objects that will be live at scavenge") \ | |
2768 \ | |
2769 product_pd(uintx, NewSizeThreadIncrease, \ | |
2770 "Additional size added to desired new generation size per " \ | |
2771 "non-daemon thread (in bytes)") \ | |
2772 \ | |
2773 product(uintx, OldSize, ScaleForWordSize(4096*K), \ | |
2774 "Default size of tenured generation (in bytes)") \ | |
2775 \ | |
2776 product_pd(uintx, PermSize, \ | |
2777 "Default size of permanent generation (in bytes)") \ | |
2778 \ | |
2779 product_pd(uintx, MaxPermSize, \ | |
2780 "Maximum size of permanent generation (in bytes)") \ | |
2781 \ | |
2782 product(uintx, MinHeapFreeRatio, 40, \ | |
2783 "Min percentage of heap free after GC to avoid expansion") \ | |
2784 \ | |
2785 product(uintx, MaxHeapFreeRatio, 70, \ | |
2786 "Max percentage of heap free after GC to avoid shrinking") \ | |
2787 \ | |
2788 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ | |
2789 "Number of milliseconds per MB of free space in the heap") \ | |
2790 \ | |
2791 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ | |
2792 "Min change in heap space due to GC (in bytes)") \ | |
2793 \ | |
2794 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ | |
2795 "Min expansion of permanent heap (in bytes)") \ | |
2796 \ | |
2797 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ | |
2798 "Max expansion of permanent heap without full GC (in bytes)") \ | |
2799 \ | |
2800 product(intx, QueuedAllocationWarningCount, 0, \ | |
2801 "Number of times an allocation that queues behind a GC " \ | |
2802 "will retry before printing a warning") \ | |
2803 \ | |
2804 diagnostic(uintx, VerifyGCStartAt, 0, \ | |
2805 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ | |
2806 \ | |
2807 diagnostic(intx, VerifyGCLevel, 0, \ | |
2808 "Generation level at which to start +VerifyBefore/AfterGC") \ | |
2809 \ | |
2810 develop(uintx, ExitAfterGCNum, 0, \ | |
2811 "If non-zero, exit after this GC.") \ | |
2812 \ | |
2813 product(intx, MaxTenuringThreshold, 15, \ | |
2814 "Maximum value for tenuring threshold") \ | |
2815 \ | |
2816 product(intx, InitialTenuringThreshold, 7, \ | |
2817 "Initial value for tenuring threshold") \ | |
2818 \ | |
2819 product(intx, TargetSurvivorRatio, 50, \ | |
2820 "Desired percentage of survivor space used after scavenge") \ | |
2821 \ | |
438 | 2822 product(uintx, MarkSweepDeadRatio, 5, \ |
0 | 2823 "Percentage (0-100) of the old gen allowed as dead wood." \ |
2824 "Serial mark sweep treats this as both the min and max value." \ | |
2825 "CMS uses this value only if it falls back to mark sweep." \ | |
2826 "Par compact uses a variable scale based on the density of the" \ | |
2827 "generation and treats this as the max value when the heap is" \ | |
2828 "either completely full or completely empty. Par compact also" \ | |
2829 "has a smaller default value; see arguments.cpp.") \ | |
2830 \ | |
438 | 2831 product(uintx, PermMarkSweepDeadRatio, 20, \ |
0 | 2832 "Percentage (0-100) of the perm gen allowed as dead wood." \ |
2833 "See MarkSweepDeadRatio for collector-specific comments.") \ | |
2834 \ | |
2835 product(intx, MarkSweepAlwaysCompactCount, 4, \ | |
2836 "How often should we fully compact the heap (ignoring the dead " \ | |
2837 "space parameters)") \ | |
2838 \ | |
2839 product(intx, PrintCMSStatistics, 0, \ | |
2840 "Statistics for CMS") \ | |
2841 \ | |
2842 product(bool, PrintCMSInitiationStatistics, false, \ | |
2843 "Statistics for initiating a CMS collection") \ | |
2844 \ | |
2845 product(intx, PrintFLSStatistics, 0, \ | |
2846 "Statistics for CMS' FreeListSpace") \ | |
2847 \ | |
2848 product(intx, PrintFLSCensus, 0, \ | |
2849 "Census for CMS' FreeListSpace") \ | |
2850 \ | |
2851 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ | |
2852 "Delay in ms between expansion and allocation") \ | |
2853 \ | |
2854 product(intx, DeferThrSuspendLoopCount, 4000, \ | |
2855 "(Unstable) Number of times to iterate in safepoint loop " \ | |
2856 " before blocking VM threads ") \ | |
2857 \ | |
2858 product(intx, DeferPollingPageLoopCount, -1, \ | |
2859 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ | |
2860 "before changing safepoint polling page to RO ") \ | |
2861 \ | |
2862 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ | |
2863 \ | |
2864 product(bool, UseDepthFirstScavengeOrder, true, \ | |
2865 "true: the scavenge order will be depth-first, " \ | |
2866 "false: the scavenge order will be breadth-first") \ | |
2867 \ | |
2868 product(bool, PSChunkLargeArrays, true, \ | |
2869 "true: process large arrays in chunks") \ | |
2870 \ | |
2871 product(uintx, GCDrainStackTargetSize, 64, \ | |
2872 "how many entries we'll try to leave on the stack during " \ | |
2873 "parallel GC") \ | |
2874 \ | |
342
37f87013dfd8
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diff
changeset
|
2875 product(intx, DCQBarrierQueueBufferSize, 256, \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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142
diff
changeset
|
2876 "Number of elements in a dirty card queue buffer") \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
142
diff
changeset
|
2877 \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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parents:
142
diff
changeset
|
2878 product(intx, DCQBarrierProcessCompletedThreshold, 5, \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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142
diff
changeset
|
2879 "Number of completed dirty card buffers to trigger processing.") \ |
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142
diff
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|
2880 \ |
0 | 2881 /* stack parameters */ \ |
2882 product_pd(intx, StackYellowPages, \ | |
2883 "Number of yellow zone (recoverable overflows) pages") \ | |
2884 \ | |
2885 product_pd(intx, StackRedPages, \ | |
2886 "Number of red zone (unrecoverable overflows) pages") \ | |
2887 \ | |
2888 product_pd(intx, StackShadowPages, \ | |
2889 "Number of shadow zone (for overflow checking) pages" \ | |
2890 " this should exceed the depth of the VM and native call stack") \ | |
2891 \ | |
2892 product_pd(intx, ThreadStackSize, \ | |
2893 "Thread Stack Size (in Kbytes)") \ | |
2894 \ | |
2895 product_pd(intx, VMThreadStackSize, \ | |
2896 "Non-Java Thread Stack Size (in Kbytes)") \ | |
2897 \ | |
2898 product_pd(intx, CompilerThreadStackSize, \ | |
2899 "Compiler Thread Stack Size (in Kbytes)") \ | |
2900 \ | |
2901 develop_pd(uintx, JVMInvokeMethodSlack, \ | |
2902 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ | |
2903 \ | |
2904 product(uintx, ThreadSafetyMargin, 50*M, \ | |
2905 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ | |
2906 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ | |
2907 "disable this feature") \ | |
2908 \ | |
2909 /* code cache parameters */ \ | |
2910 develop(uintx, CodeCacheSegmentSize, 64, \ | |
2911 "Code cache segment size (in bytes) - smallest unit of " \ | |
2912 "allocation") \ | |
2913 \ | |
2914 develop_pd(intx, CodeEntryAlignment, \ | |
2915 "Code entry alignment for generated code (in bytes)") \ | |
2916 \ | |
2917 product_pd(uintx, InitialCodeCacheSize, \ | |
2918 "Initial code cache size (in bytes)") \ | |
2919 \ | |
2920 product_pd(uintx, ReservedCodeCacheSize, \ | |
2921 "Reserved code cache size (in bytes) - maximum code cache size") \ | |
2922 \ | |
2923 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ | |
2924 "When less than X space left, we stop compiling.") \ | |
2925 \ | |
2926 product_pd(uintx, CodeCacheExpansionSize, \ | |
2927 "Code cache expansion size (in bytes)") \ | |
2928 \ | |
2929 develop_pd(uintx, CodeCacheMinBlockLength, \ | |
2930 "Minimum number of segments in a code cache block.") \ | |
2931 \ | |
2932 notproduct(bool, ExitOnFullCodeCache, false, \ | |
2933 "Exit the VM if we fill the code cache.") \ | |
2934 \ | |
2935 /* interpreter debugging */ \ | |
2936 develop(intx, BinarySwitchThreshold, 5, \ | |
2937 "Minimal number of lookupswitch entries for rewriting to binary " \ | |
2938 "switch") \ | |
2939 \ | |
2940 develop(intx, StopInterpreterAt, 0, \ | |
2941 "Stops interpreter execution at specified bytecode number") \ | |
2942 \ | |
2943 develop(intx, TraceBytecodesAt, 0, \ | |
2944 "Traces bytecodes starting with specified bytecode number") \ | |
2945 \ | |
2946 /* compiler interface */ \ | |
2947 develop(intx, CIStart, 0, \ | |
2948 "the id of the first compilation to permit") \ | |
2949 \ | |
2950 develop(intx, CIStop, -1, \ | |
2951 "the id of the last compilation to permit") \ | |
2952 \ | |
2953 develop(intx, CIStartOSR, 0, \ | |
2954 "the id of the first osr compilation to permit " \ | |
2955 "(CICountOSR must be on)") \ | |
2956 \ | |
2957 develop(intx, CIStopOSR, -1, \ | |
2958 "the id of the last osr compilation to permit " \ | |
2959 "(CICountOSR must be on)") \ | |
2960 \ | |
2961 develop(intx, CIBreakAtOSR, -1, \ | |
2962 "id of osr compilation to break at") \ | |
2963 \ | |
2964 develop(intx, CIBreakAt, -1, \ | |
2965 "id of compilation to break at") \ | |
2966 \ | |
2967 product(ccstrlist, CompileOnly, "", \ | |
2968 "List of methods (pkg/class.name) to restrict compilation to") \ | |
2969 \ | |
2970 product(ccstr, CompileCommandFile, NULL, \ | |
2971 "Read compiler commands from this file [.hotspot_compiler]") \ | |
2972 \ | |
2973 product(ccstrlist, CompileCommand, "", \ | |
2974 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ | |
2975 \ | |
2976 product(bool, CICompilerCountPerCPU, false, \ | |
2977 "1 compiler thread for log(N CPUs)") \ | |
2978 \ | |
2979 develop(intx, CIFireOOMAt, -1, \ | |
2980 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ | |
2981 "(non-negative value throws OOM after this many CI accesses " \ | |
2982 "in each compile)") \ | |
2983 \ | |
2984 develop(intx, CIFireOOMAtDelay, -1, \ | |
2985 "Wait for this many CI accesses to occur in all compiles before " \ | |
2986 "beginning to throw OutOfMemoryErrors in each compile") \ | |
2987 \ | |
2988 /* Priorities */ \ | |
2989 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ | |
2990 \ | |
2991 product(intx, ThreadPriorityPolicy, 0, \ | |
2992 "0 : Normal. "\ | |
2993 " VM chooses priorities that are appropriate for normal "\ | |
2994 " applications. On Solaris NORM_PRIORITY and above are mapped "\ | |
2995 " to normal native priority. Java priorities below NORM_PRIORITY"\ | |
2996 " map to lower native priority values. On Windows applications"\ | |
2997 " are allowed to use higher native priorities. However, with "\ | |
2998 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ | |
2999 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ | |
3000 " interfere with system threads. On Linux thread priorities "\ | |
3001 " are ignored because the OS does not support static priority "\ | |
3002 " in SCHED_OTHER scheduling class which is the only choice for"\ | |
3003 " non-root, non-realtime applications. "\ | |
3004 "1 : Aggressive. "\ | |
3005 " Java thread priorities map over to the entire range of "\ | |
3006 " native thread priorities. Higher Java thread priorities map "\ | |
3007 " to higher native thread priorities. This policy should be "\ | |
3008 " used with care, as sometimes it can cause performance "\ | |
3009 " degradation in the application and/or the entire system. On "\ | |
3010 " Linux this policy requires root privilege.") \ | |
3011 \ | |
3012 product(bool, ThreadPriorityVerbose, false, \ | |
3013 "print priority changes") \ | |
3014 \ | |
3015 product(intx, DefaultThreadPriority, -1, \ | |
3016 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ | |
3017 \ | |
3018 product(intx, CompilerThreadPriority, -1, \ | |
3019 "what priority should compiler threads run at (-1 means no change)") \ | |
3020 \ | |
3021 product(intx, VMThreadPriority, -1, \ | |
3022 "what priority should VM threads run at (-1 means no change)") \ | |
3023 \ | |
3024 product(bool, CompilerThreadHintNoPreempt, true, \ | |
3025 "(Solaris only) Give compiler threads an extra quanta") \ | |
3026 \ | |
3027 product(bool, VMThreadHintNoPreempt, false, \ | |
3028 "(Solaris only) Give VM thread an extra quanta") \ | |
3029 \ | |
3030 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3031 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3032 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3033 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3034 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3035 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3036 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3037 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3038 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ | |
3039 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ | |
3040 \ | |
3041 /* compiler debugging */ \ | |
3042 notproduct(intx, CompileTheWorldStartAt, 1, \ | |
3043 "First class to consider when using +CompileTheWorld") \ | |
3044 \ | |
3045 notproduct(intx, CompileTheWorldStopAt, max_jint, \ | |
3046 "Last class to consider when using +CompileTheWorld") \ | |
3047 \ | |
3048 develop(intx, NewCodeParameter, 0, \ | |
3049 "Testing Only: Create a dedicated integer parameter before " \ | |
3050 "putback") \ | |
3051 \ | |
3052 /* new oopmap storage allocation */ \ | |
3053 develop(intx, MinOopMapAllocation, 8, \ | |
3054 "Minimum number of OopMap entries in an OopMapSet") \ | |
3055 \ | |
3056 /* Background Compilation */ \ | |
3057 develop(intx, LongCompileThreshold, 50, \ | |
3058 "Used with +TraceLongCompiles") \ | |
3059 \ | |
3060 product(intx, StarvationMonitorInterval, 200, \ | |
3061 "Pause between each check in ms") \ | |
3062 \ | |
3063 /* recompilation */ \ | |
3064 product_pd(intx, CompileThreshold, \ | |
3065 "number of interpreted method invocations before (re-)compiling") \ | |
3066 \ | |
3067 product_pd(intx, BackEdgeThreshold, \ | |
3068 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ | |
3069 \ | |
3070 product(intx, Tier1BytecodeLimit, 10, \ | |
3071 "Must have at least this many bytecodes before tier1" \ | |
3072 "invocation counters are used") \ | |
3073 \ | |
3074 product_pd(intx, Tier2CompileThreshold, \ | |
3075 "threshold at which a tier 2 compilation is invoked") \ | |
3076 \ | |
3077 product_pd(intx, Tier2BackEdgeThreshold, \ | |
3078 "Back edge threshold at which a tier 2 compilation is invoked") \ | |
3079 \ | |
3080 product_pd(intx, Tier3CompileThreshold, \ | |
3081 "threshold at which a tier 3 compilation is invoked") \ | |
3082 \ | |
3083 product_pd(intx, Tier3BackEdgeThreshold, \ | |
3084 "Back edge threshold at which a tier 3 compilation is invoked") \ | |
3085 \ | |
3086 product_pd(intx, Tier4CompileThreshold, \ | |
3087 "threshold at which a tier 4 compilation is invoked") \ | |
3088 \ | |
3089 product_pd(intx, Tier4BackEdgeThreshold, \ | |
3090 "Back edge threshold at which a tier 4 compilation is invoked") \ | |
3091 \ | |
3092 product_pd(bool, TieredCompilation, \ | |
3093 "Enable two-tier compilation") \ | |
3094 \ | |
3095 product(bool, StressTieredRuntime, false, \ | |
3096 "Alternate client and server compiler on compile requests") \ | |
3097 \ | |
3098 product_pd(intx, OnStackReplacePercentage, \ | |
3099 "NON_TIERED number of method invocations/branches (expressed as %"\ | |
3100 "of CompileThreshold) before (re-)compiling OSR code") \ | |
3101 \ | |
3102 product(intx, InterpreterProfilePercentage, 33, \ | |
3103 "NON_TIERED number of method invocations/branches (expressed as %"\ | |
3104 "of CompileThreshold) before profiling in the interpreter") \ | |
3105 \ | |
3106 develop(intx, MaxRecompilationSearchLength, 10, \ | |
3107 "max. # frames to inspect searching for recompilee") \ | |
3108 \ | |
3109 develop(intx, MaxInterpretedSearchLength, 3, \ | |
3110 "max. # interp. frames to skip when searching for recompilee") \ | |
3111 \ | |
3112 develop(intx, DesiredMethodLimit, 8000, \ | |
3113 "desired max. method size (in bytecodes) after inlining") \ | |
3114 \ | |
3115 develop(intx, HugeMethodLimit, 8000, \ | |
3116 "don't compile methods larger than this if " \ | |
3117 "+DontCompileHugeMethods") \ | |
3118 \ | |
3119 /* New JDK 1.4 reflection implementation */ \ | |
3120 \ | |
3121 develop(bool, UseNewReflection, true, \ | |
3122 "Temporary flag for transition to reflection based on dynamic " \ | |
3123 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ | |
3124 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ | |
3125 "changes were needed") \ | |
3126 \ | |
3127 develop(bool, VerifyReflectionBytecodes, false, \ | |
3128 "Force verification of 1.4 reflection bytecodes. Does not work " \ | |
3129 "in situations like that described in 4486457 or for " \ | |
3130 "constructors generated for serialization, so can not be enabled "\ | |
3131 "in product.") \ | |
3132 \ | |
3133 product(bool, ReflectionWrapResolutionErrors, true, \ | |
3134 "Temporary flag for transition to AbstractMethodError wrapped " \ | |
3135 "in InvocationTargetException. See 6531596") \ | |
3136 \ | |
3137 \ | |
3138 develop(intx, FastSuperclassLimit, 8, \ | |
3139 "Depth of hardwired instanceof accelerator array") \ | |
3140 \ | |
3141 /* Properties for Java libraries */ \ | |
3142 \ | |
3143 product(intx, MaxDirectMemorySize, -1, \ | |
3144 "Maximum total size of NIO direct-buffer allocations") \ | |
3145 \ | |
3146 /* temporary developer defined flags */ \ | |
3147 \ | |
3148 diagnostic(bool, UseNewCode, false, \ | |
3149 "Testing Only: Use the new version while testing") \ | |
3150 \ | |
3151 diagnostic(bool, UseNewCode2, false, \ | |
3152 "Testing Only: Use the new version while testing") \ | |
3153 \ | |
3154 diagnostic(bool, UseNewCode3, false, \ | |
3155 "Testing Only: Use the new version while testing") \ | |
3156 \ | |
3157 /* flags for performance data collection */ \ | |
3158 \ | |
3159 product(bool, UsePerfData, true, \ | |
3160 "Flag to disable jvmstat instrumentation for performance testing" \ | |
3161 "and problem isolation purposes.") \ | |
3162 \ | |
3163 product(bool, PerfDataSaveToFile, false, \ | |
3164 "Save PerfData memory to hsperfdata_<pid> file on exit") \ | |
3165 \ | |
3166 product(ccstr, PerfDataSaveFile, NULL, \ | |
3167 "Save PerfData memory to the specified absolute pathname," \ | |
3168 "%p in the file name if present will be replaced by pid") \ | |
3169 \ | |
3170 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ | |
3171 "Data sampling interval in milliseconds") \ | |
3172 \ | |
3173 develop(bool, PerfTraceDataCreation, false, \ | |
3174 "Trace creation of Performance Data Entries") \ | |
3175 \ | |
3176 develop(bool, PerfTraceMemOps, false, \ | |
3177 "Trace PerfMemory create/attach/detach calls") \ | |
3178 \ | |
3179 product(bool, PerfDisableSharedMem, false, \ | |
3180 "Store performance data in standard memory") \ | |
3181 \ | |
3182 product(intx, PerfDataMemorySize, 32*K, \ | |
3183 "Size of performance data memory region. Will be rounded " \ | |
3184 "up to a multiple of the native os page size.") \ | |
3185 \ | |
3186 product(intx, PerfMaxStringConstLength, 1024, \ | |
3187 "Maximum PerfStringConstant string length before truncation") \ | |
3188 \ | |
3189 product(bool, PerfAllowAtExitRegistration, false, \ | |
3190 "Allow registration of atexit() methods") \ | |
3191 \ | |
3192 product(bool, PerfBypassFileSystemCheck, false, \ | |
3193 "Bypass Win32 file system criteria checks (Windows Only)") \ | |
3194 \ | |
3195 product(intx, UnguardOnExecutionViolation, 0, \ | |
3196 "Unguard page and retry on no-execute fault (Win32 only)" \ | |
3197 "0=off, 1=conservative, 2=aggressive") \ | |
3198 \ | |
3199 /* Serviceability Support */ \ | |
3200 \ | |
3201 product(bool, ManagementServer, false, \ | |
3202 "Create JMX Management Server") \ | |
3203 \ | |
3204 product(bool, DisableAttachMechanism, false, \ | |
3205 "Disable mechanism that allows tools to attach to this VM") \ | |
3206 \ | |
3207 product(bool, StartAttachListener, false, \ | |
3208 "Always start Attach Listener at VM startup") \ | |
3209 \ | |
3210 manageable(bool, PrintConcurrentLocks, false, \ | |
3211 "Print java.util.concurrent locks in thread dump") \ | |
3212 \ | |
3213 /* Shared spaces */ \ | |
3214 \ | |
3215 product(bool, UseSharedSpaces, true, \ | |
3216 "Use shared spaces in the permanent generation") \ | |
3217 \ | |
3218 product(bool, RequireSharedSpaces, false, \ | |
3219 "Require shared spaces in the permanent generation") \ | |
3220 \ | |
3221 product(bool, ForceSharedSpaces, false, \ | |
3222 "Require shared spaces in the permanent generation") \ | |
3223 \ | |
3224 product(bool, DumpSharedSpaces, false, \ | |
3225 "Special mode: JVM reads a class list, loads classes, builds " \ | |
3226 "shared spaces, and dumps the shared spaces to a file to be " \ | |
3227 "used in future JVM runs.") \ | |
3228 \ | |
3229 product(bool, PrintSharedSpaces, false, \ | |
3230 "Print usage of shared spaces") \ | |
3231 \ | |
3232 product(uintx, SharedDummyBlockSize, 512*M, \ | |
3233 "Size of dummy block used to shift heap addresses (in bytes)") \ | |
3234 \ | |
3235 product(uintx, SharedReadWriteSize, 12*M, \ | |
3236 "Size of read-write space in permanent generation (in bytes)") \ | |
3237 \ | |
3238 product(uintx, SharedReadOnlySize, 8*M, \ | |
3239 "Size of read-only space in permanent generation (in bytes)") \ | |
3240 \ | |
3241 product(uintx, SharedMiscDataSize, 4*M, \ | |
3242 "Size of the shared data area adjacent to the heap (in bytes)") \ | |
3243 \ | |
3244 product(uintx, SharedMiscCodeSize, 4*M, \ | |
3245 "Size of the shared code area adjacent to the heap (in bytes)") \ | |
3246 \ | |
3247 diagnostic(bool, SharedOptimizeColdStart, true, \ | |
3248 "At dump time, order shared objects to achieve better " \ | |
3249 "cold startup time.") \ | |
3250 \ | |
3251 develop(intx, SharedOptimizeColdStartPolicy, 2, \ | |
3252 "Reordering policy for SharedOptimizeColdStart " \ | |
3253 "0=favor classload-time locality, 1=balanced, " \ | |
3254 "2=favor runtime locality") \ | |
3255 \ | |
3256 diagnostic(bool, SharedSkipVerify, false, \ | |
3257 "Skip assert() and verify() which page-in unwanted shared " \ | |
3258 "objects. ") \ | |
3259 \ | |
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
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406
diff
changeset
|
3260 product(bool, AnonymousClasses, false, \ |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
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406
diff
changeset
|
3261 "support sun.misc.Unsafe.defineAnonymousClass") \ |
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
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406
diff
changeset
|
3262 \ |
0 | 3263 product(bool, TaggedStackInterpreter, false, \ |
3264 "Insert tags in interpreter execution stack for oopmap generaion")\ | |
3265 \ | |
3266 diagnostic(bool, PauseAtStartup, false, \ | |
3267 "Causes the VM to pause at startup time and wait for the pause " \ | |
3268 "file to be removed (default: ./vm.paused.<pid>)") \ | |
3269 \ | |
3270 diagnostic(ccstr, PauseAtStartupFile, NULL, \ | |
3271 "The file to create and for whose removal to await when pausing " \ | |
3272 "at startup. (default: ./vm.paused.<pid>)") \ | |
3273 \ | |
3274 product(bool, ExtendedDTraceProbes, false, \ | |
3275 "Enable performance-impacting dtrace probes") \ | |
3276 \ | |
3277 product(bool, DTraceMethodProbes, false, \ | |
3278 "Enable dtrace probes for method-entry and method-exit") \ | |
3279 \ | |
3280 product(bool, DTraceAllocProbes, false, \ | |
3281 "Enable dtrace probes for object allocation") \ | |
3282 \ | |
3283 product(bool, DTraceMonitorProbes, false, \ | |
3284 "Enable dtrace probes for monitor events") \ | |
3285 \ | |
3286 product(bool, RelaxAccessControlCheck, false, \ | |
3287 "Relax the access control checks in the verifier") \ | |
3288 \ | |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
changeset
|
3289 diagnostic(bool, PrintDTraceDOF, false, \ |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
changeset
|
3290 "Print the DTrace DOF passed to the system for JSDT probes") \ |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
changeset
|
3291 \ |
449
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
443
diff
changeset
|
3292 product(bool, UseVMInterruptibleIO, false, \ |
0 | 3293 "(Unstable, Solaris-specific) Thread interrupt before or with " \ |
449
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
443
diff
changeset
|
3294 "EINTR for I/O operations results in OS_INTRPT. The default value"\ |
171e581e8161
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xlu
parents:
443
diff
changeset
|
3295 " of this flag is true for JDK 6 and earliers") |
0 | 3296 |
3297 | |
3298 /* | |
3299 * Macros for factoring of globals | |
3300 */ | |
3301 | |
3302 // Interface macros | |
3303 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; | |
3304 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; | |
3305 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; | |
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3306 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; |
0 | 3307 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; |
3308 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; | |
3309 #ifdef PRODUCT | |
3310 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; | |
3311 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; | |
3312 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) | |
3313 #else | |
3314 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; | |
3315 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; | |
3316 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; | |
3317 #endif | |
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3318 // Special LP64 flags, product only needed for now. |
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3319 #ifdef _LP64 |
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3320 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; |
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3321 #else |
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3322 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; |
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3323 #endif // _LP64 |
0 | 3324 |
3325 // Implementation macros | |
3326 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; | |
3327 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; | |
3328 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; | |
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3329 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; |
0 | 3330 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; |
3331 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; | |
3332 #ifdef PRODUCT | |
3333 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ | |
3334 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ | |
3335 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) | |
3336 #else | |
3337 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; | |
3338 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; | |
3339 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; | |
3340 #endif | |
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3341 #ifdef _LP64 |
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3342 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; |
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3343 #else |
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3344 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ |
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3345 #endif // _LP64 |
0 | 3346 |
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3347 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 | 3348 |
3349 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) |