1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
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
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25 #ifndef SHARE_COMPILER_COMPILER_GLOBALS_HPP
26 #define SHARE_COMPILER_COMPILER_GLOBALS_HPP
27
28 #include "compiler/compiler_globals_pd.hpp"
29 #include "runtime/globals_shared.hpp"
30 #ifdef COMPILER1
31 #include "c1/c1_globals.hpp"
32 #endif // COMPILER1
33 #ifdef COMPILER2
34 #include "opto/c2_globals.hpp"
35 #endif // COMPILER2
36 #if INCLUDE_JVMCI
37 #include "jvmci/jvmci_globals.hpp"
38 #endif
39
40 // TODO -- currently, even if all JIT compilers are disabled, the following flags
41 // are still available in HotSpot. This should eventually be fixed ...
42
43 #define COMPILER_FLAGS(develop, \
44 develop_pd, \
45 product, \
46 product_pd, \
47 range, \
48 constraint) \
49 \
50 /* compiler interface */ \
51 \
52 product(bool, CIPrintCompilerName, false, DIAGNOSTIC, \
53 "when CIPrint is active, print the name of the active compiler") \
54 \
55 product(bool, CIPrintCompileQueue, false, DIAGNOSTIC, \
56 "display the contents of the compile queue whenever a " \
57 "compilation is enqueued") \
58 \
59 develop(bool, CIPrintRequests, false, \
60 "display every request for compilation") \
61 \
62 product(bool, CITime, false, \
63 "collect timing information for compilation") \
64 \
65 develop(bool, CITimeVerbose, false, \
66 "be more verbose in compilation timings") \
67 \
68 develop(bool, CITimeEach, false, \
69 "display timing information after each successful compilation") \
70 \
71 develop(bool, CICountOSR, false, \
72 "use a separate counter when assigning ids to osr compilations") \
73 \
74 develop(bool, CICountNative, false, \
75 "use a separate counter when assigning ids to native " \
76 "compilations") \
77 \
78 develop(bool, CICompileNatives, true, \
79 "compile native methods if supported by the compiler") \
80 \
81 develop_pd(bool, CICompileOSR, \
82 "compile on stack replacement methods if supported by the " \
83 "compiler") \
84 \
85 develop(bool, CIPrintMethodCodes, false, \
86 "print method bytecodes of the compiled code") \
87 \
88 develop(bool, CIPrintTypeFlow, false, \
89 "print the results of ciTypeFlow analysis") \
90 \
91 develop(bool, CITraceTypeFlow, false, \
92 "detailed per-bytecode tracing of ciTypeFlow analysis") \
93 \
94 product(bool, CICompilerCountPerCPU, false, \
95 "1 compiler thread for log(N CPUs)") \
96 \
97 develop(intx, CICrashAt, -1, \
98 "id of compilation to trigger assert in compiler thread for " \
99 "the purpose of testing, e.g. generation of replay data") \
100 \
101 develop(bool, CIObjectFactoryVerify, false, \
102 "enable potentially expensive verification in ciObjectFactory") \
103 \
104 develop(intx, CIStart, 0, \
105 "The id of the first compilation to permit") \
106 \
107 develop(intx, CIStop, max_jint, \
108 "The id of the last compilation to permit") \
109 \
110 develop(intx, CIStartOSR, 0, \
111 "The id of the first osr compilation to permit " \
112 "(CICountOSR must be on)") \
113 \
114 develop(intx, CIStopOSR, max_jint, \
115 "The id of the last osr compilation to permit " \
116 "(CICountOSR must be on)") \
117 \
118 develop(intx, CIBreakAtOSR, -1, \
119 "The id of osr compilation to break at") \
120 \
121 develop(intx, CIBreakAt, -1, \
122 "The id of compilation to break at") \
123 \
124 /* recompilation */ \
125 \
126 product(double, CompileThresholdScaling, 1.0, \
127 "Factor to control when first compilation happens " \
128 "(both with and without tiered compilation): " \
129 "values greater than 1.0 delay counter overflow, " \
130 "values between 0 and 1.0 rush counter overflow, " \
131 "value of 1.0 leaves compilation thresholds unchanged " \
132 "value of 0.0 is equivalent to -Xint. " \
133 "" \
134 "Flag can be set as per-method option. " \
135 "If a value is specified for a method, compilation thresholds " \
136 "for that method are scaled by both the value of the global flag "\
137 "and the value of the per-method flag.") \
138 range(0.0, DBL_MAX) \
139 \
140 product(intx, Tier0InvokeNotifyFreqLog, 7, \
141 "Interpreter (tier 0) invocation notification frequency") \
142 range(0, 30) \
143 \
144 product(intx, Tier2InvokeNotifyFreqLog, 11, \
145 "C1 without MDO (tier 2) invocation notification frequency") \
146 range(0, 30) \
147 \
148 product(intx, Tier3InvokeNotifyFreqLog, 10, \
149 "C1 with MDO profiling (tier 3) invocation notification " \
150 "frequency") \
151 range(0, 30) \
152 \
153 product(intx, Tier23InlineeNotifyFreqLog, 20, \
154 "Inlinee invocation (tiers 2 and 3) notification frequency") \
155 range(0, 30) \
156 \
157 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
158 "Interpreter (tier 0) invocation notification frequency") \
159 range(0, 30) \
160 \
161 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
162 "C1 without MDO (tier 2) invocation notification frequency") \
163 range(0, 30) \
164 \
165 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
166 "C1 with MDO profiling (tier 3) invocation notification " \
167 "frequency") \
168 range(0, 30) \
169 \
170 product(intx, Tier2CompileThreshold, 0, \
171 "threshold at which tier 2 compilation is invoked") \
172 range(0, max_jint) \
173 \
174 product(intx, Tier2BackEdgeThreshold, 0, \
175 "Back edge threshold at which tier 2 compilation is invoked") \
176 range(0, max_jint) \
177 \
178 product(intx, Tier3InvocationThreshold, 200, \
179 "Compile if number of method invocations crosses this " \
180 "threshold") \
181 range(0, max_jint) \
182 \
183 product(intx, Tier3MinInvocationThreshold, 100, \
184 "Minimum invocation to compile at tier 3") \
185 range(0, max_jint) \
186 \
187 product(intx, Tier3CompileThreshold, 2000, \
188 "Threshold at which tier 3 compilation is invoked (invocation " \
189 "minimum must be satisfied)") \
190 range(0, max_jint) \
191 \
192 product(intx, Tier3BackEdgeThreshold, 60000, \
193 "Back edge threshold at which tier 3 OSR compilation is invoked") \
194 range(0, max_jint) \
195 \
196 product(intx, Tier4InvocationThreshold, 5000, \
197 "Compile if number of method invocations crosses this " \
198 "threshold") \
199 range(0, max_jint) \
200 \
201 product(intx, Tier4MinInvocationThreshold, 600, \
202 "Minimum invocation to compile at tier 4") \
203 range(0, max_jint) \
204 \
205 product(intx, Tier4CompileThreshold, 15000, \
206 "Threshold at which tier 4 compilation is invoked (invocation " \
207 "minimum must be satisfied)") \
208 range(0, max_jint) \
209 \
210 product(intx, Tier4BackEdgeThreshold, 40000, \
211 "Back edge threshold at which tier 4 OSR compilation is invoked") \
212 range(0, max_jint) \
213 \
214 product(intx, Tier0Delay, 20, DIAGNOSTIC, \
215 "If C2 queue size grows over this amount per compiler thread " \
216 "do not start profiling in the interpreter") \
217 range(0, max_jint) \
218 \
219 product(intx, TieredOldPercentage, 1000, DIAGNOSTIC, \
220 "Percentage over tier 3 thresholds after which a method is " \
221 "considered old (turns off parts of prioritization based on " \
222 "compile queue length)") \
223 range(0, max_jint) \
224 \
225 product(intx, Tier3DelayOn, 5, \
226 "If C2 queue size grows over this amount per compiler thread " \
227 "stop compiling at tier 3 and start compiling at tier 2") \
228 range(0, max_jint) \
229 \
230 product(intx, Tier3DelayOff, 2, \
231 "If C2 queue size is less than this amount per compiler thread " \
232 "allow methods compiled at tier 2 transition to tier 3") \
233 range(0, max_jint) \
234 \
235 product(intx, Tier3LoadFeedback, 5, \
236 "Tier 3 thresholds will increase twofold when C1 queue size " \
237 "reaches this amount per compiler thread") \
238 range(0, max_jint) \
239 \
240 product(intx, Tier4LoadFeedback, 3, \
241 "Tier 4 thresholds will increase twofold when C2 queue size " \
242 "reaches this amount per compiler thread") \
243 range(0, max_jint) \
244 \
245 product(intx, TieredCompileTaskTimeout, 50, \
246 "Kill compile task if method was not used within " \
247 "given timeout in milliseconds") \
248 range(0, max_intx) \
249 \
250 product(intx, TieredStopAtLevel, 4, \
251 "Stop at given compilation level") \
252 range(0, 4) \
253 \
254 product(intx, Tier0ProfilingStartPercentage, 200, \
255 "Start profiling in interpreter if the counters exceed the " \
256 "specified percentage of tier 3 thresholds") \
257 range(0, max_jint) \
258 \
259 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
260 "Increase the compile threshold for C1 compilation if the code " \
261 "cache is filled by the specified percentage") \
262 range(0, 99) \
263 \
264 product(intx, TieredRateUpdateMinTime, 1, \
265 "Minimum rate sampling interval (in milliseconds)") \
266 range(0, max_intx) \
267 \
268 product(intx, TieredRateUpdateMaxTime, 25, \
269 "Maximum rate sampling interval (in milliseconds)") \
270 range(0, max_intx) \
271 \
272 product(double, Tier0ProfileDelayFactor, 100.0, DIAGNOSTIC, \
273 "Delay profiling/compiling of methods that were " \
274 "observed to be lukewarm") \
275 \
276 product(double, Tier2ProfileDelayFactor, 250.0, DIAGNOSTIC, \
277 "Delay profiling of methods that were observed to be lukewarm") \
278 \
279 product(bool, SkipTier2IfPossible, false, DIAGNOSTIC, \
280 "Compile at tier 4 instead of tier 2 in training replay " \
281 "mode if posssible") \
282 \
283 product(ccstr, CompilationMode, "default", \
284 "Compilation modes: " \
285 "default: normal tiered compilation; " \
286 "quick-only: C1-only mode; " \
287 "high-only: C2/JVMCI-only mode; " \
288 "high-only-quick-internal: C2/JVMCI-only mode, " \
289 "with JVMCI compiler compiled with C1.") \
290 \
291 product(bool, PrintTieredEvents, false, \
292 "Print tiered events notifications") \
293 \
294 product_pd(intx, OnStackReplacePercentage, \
295 "NON_TIERED number of method invocations/branches (expressed as " \
296 "% of CompileThreshold) before (re-)compiling OSR code") \
297 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \
298 \
299 product(intx, InterpreterProfilePercentage, 33, \
300 "NON_TIERED number of method invocations/branches (expressed as " \
301 "% of CompileThreshold) before profiling in the interpreter") \
302 range(0, 100) \
303 \
304 /* compiler directives */ \
305 \
306 product(ccstrlist, CompileOnly, "", \
307 "List of methods (pkg/class.name) to restrict compilation to") \
308 \
309 product(ccstr, CompileCommandFile, nullptr, \
310 "Read compiler commands from this file [.hotspot_compiler]") \
311 \
312 product(ccstr, CompilerDirectivesFile, nullptr, DIAGNOSTIC, \
313 "Read compiler directives from this file") \
314 \
315 product(ccstrlist, CompileCommand, "", \
316 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
317 \
318 product(bool, ReplayCompiles, false, DIAGNOSTIC, \
319 "Enable replay of compilations from ReplayDataFile") \
320 \
321 product(bool, ReplayReduce, false, EXPERIMENTAL, \
322 "Enable features to facilitate replay file reduction") \
323 \
324 product(ccstr, ReplayDataFile, nullptr, \
325 "File containing compilation replay information" \
326 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
327 \
328 product(ccstr, InlineDataFile, nullptr, \
329 "File containing inlining replay information" \
330 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
331 \
332 product(intx, ReplaySuppressInitializers, 2, DIAGNOSTIC, \
333 "Control handling of class initialization during replay: " \
334 "0 - don't do anything special; " \
335 "1 - treat all class initializers as empty; " \
336 "2 - treat class initializers for application classes as empty; " \
337 "3 - allow all class initializers to run during bootstrap but " \
338 " pretend they are empty after starting replay") \
339 range(0, 3) \
340 \
341 product(bool, ReplayIgnoreInitErrors, false, DIAGNOSTIC, \
342 "Ignore exceptions thrown during initialization for replay") \
343 \
344 product(bool, DumpReplayDataOnError, true, \
345 "Record replay data for crashing compiler threads") \
346 \
347 product(bool, CompilerDirectivesIgnoreCompileCommands, false, DIAGNOSTIC, \
348 "Disable backwards compatibility for compile commands.") \
349 \
350 product(bool, CompilerDirectivesPrint, false, DIAGNOSTIC, \
351 "Print compiler directives on installation.") \
352 \
353 product(int, CompilerDirectivesLimit, 50, DIAGNOSTIC, \
354 "Limit on number of compiler directives.") \
355 \
356 /* Bytecode escape analysis estimation. */ \
357 \
358 product(bool, EstimateArgEscape, true, \
359 "Analyze bytecodes to estimate escape state of arguments") \
360 \
361 product(intx, BCEATraceLevel, 0, \
362 "How much tracing to do of bytecode escape analysis estimates " \
363 "(0-3)") \
364 range(0, 3) \
365 \
366 product(intx, MaxBCEAEstimateLevel, 5, \
367 "Maximum number of nested calls that are analyzed by BC EA") \
368 range(0, max_jint) \
369 \
370 product(intx, MaxBCEAEstimateSize, 150, \
371 "Maximum bytecode size of a method to be analyzed by BC EA") \
372 range(0, max_jint) \
373 \
374 /* misc compiler flags */ \
375 \
376 product(bool, AbortVMOnCompilationFailure, false, DIAGNOSTIC, \
377 "Abort VM when method had failed to compile.") \
378 \
379 develop(intx, OSROnlyBCI, -1, \
380 "OSR only at this bci. Negative values mean exclude that bci") \
381 \
382 develop(intx, DesiredMethodLimit, 8000, \
383 "The desired maximum method size (in bytecodes) after inlining") \
384 \
385 product(bool, DontCompileHugeMethods, true, \
386 "Do not compile methods > HugeMethodLimit") \
387 \
388 develop(intx, HugeMethodLimit, 8000, \
389 "Don't compile methods larger than this if " \
390 "+DontCompileHugeMethods") \
391 \
392 product(bool, CaptureBailoutInformation, trueInDebug, DIAGNOSTIC, \
393 "If compilation is stopped with an error, capture diagnostic " \
394 "information at the bailout point") \
395 \
396 /* flags to control training and deployment modes */ \
397 \
398 product(bool, RecordTraining, false, \
399 "Request output of training data for improved deployment.") \
400 \
401 product(bool, ReplayTraining, false, \
402 "Read training data, if available, for use in this execution") \
403 \
404 product(bool, PrintTrainingInfo, false, DIAGNOSTIC, \
405 "Print additional information about training") \
406 \
407 product(bool, RecordOptCompilationOrder, false, \
408 "Record c2/jvmci nmethod temperature to guide compilation order.")\
409 \
410 product(bool, RecordOnlyTopCompilations, false, \
411 "Record only top compilations (non-zero counts)") \
412 \
413 product(int, RecordOptCompilationOrderInterval, 10, \
414 "Sampling interval for RecordOptCompilationOrder") \
415 \
416 /* Code Caching flags */ \
417 \
418 product(bool, UseC2asC3, false, \
419 "Use C2 as 3rd compiler when other high-optimizing compiler " \
420 "is used") \
421 \
422 product(bool, StoreCachedCode, false, \
423 "Store cached compiled code") \
424 \
425 product(bool, LoadCachedCode, false, \
426 "Load cached compiled code") \
427 \
428 product(uint, DisableCachedCode, 0, \
429 "Disable cached code on some compilation levels " \
430 "(T1=1; T2=2; T4=4; T5/preload=8") \
431 \
432 product(uint, ClassInitBarrierMode, 0, \
433 "Produce and use startup code which could be called " \
434 "on first method invocation, add class initialization barriers, " \
435 "other checks and constrains if needed " \
436 "(0: no barriers; 1: uncommon trap; 2: full barrier)") \
437 \
438 product(bool, StressClassInitBarriers, false, DIAGNOSTIC, \
439 "Force slow path in class initialization barriers") \
440 \
441 product(bool, UseMetadataPointers, true, \
442 "Store Metadata pointers in Relocation Info for cached code") \
443 \
444 product(bool, UseCodeLoadThread, true, \
445 "Use separate thread for cached code load") \
446 \
447 product(uint, SCLoadStart, 0, \
448 "The id of the first cached code to load") \
449 \
450 product(uint, SCLoadStop, max_jint, \
451 "The id of the last cached code to load") \
452 \
453 product(ccstr, CachedCodeFile, "code.jsa", \
454 "File with cached compiled code") \
455 \
456 product(uint, CachedCodeMaxSize, 10*M, \
457 "Buffer size in bytes for code caching") \
458 \
459 product(bool, VerifyCachedCode, false, DIAGNOSTIC, \
460 "Load compiled code but not publish") \
461 \
462 /* Recompilation flags */ \
463 \
464 product(int, RecompilationLoadAverageThreshold, 5, \
465 "Queues load avergage after while recompilations are allowed") \
466 \
467 product(int, RecompilationWorkUnitSize, 5, \
468 "Queues load avergage after while recompilations are allowed") \
469 \
470 product(bool, UseRecompilation, false, \
471 "Recompile methods for peak performance") \
472 \
473 product(bool, ForceRecompilation, false, \
474 "Testing mode for recompilation") \
475 \
476 product(double, DelayRecompilation, 0.0, \
477 "Delay recompilation for given number of seconds") \
478 \
479 product(bool, UseConcurrentTrainingReplay, true, \
480 "Replay training after class initialization in a separate thread")\
481 \
482 product(bool, UseGlobalCompileQueueLock, false, \
483 "Use a global lock for all compilation queues") \
484 \
485 product(bool, UseLockFreeCompileQueues, true, \
486 "Use lock free compile queues") \
487 \
488 product(bool, PrecompileCode, false, \
489 "Precompile code") \
490 \
491 product(bool, PrecompileOnlyAndExit, false, \
492 "Exit after precompilation step is over") \
493
494 // end of COMPILER_FLAGS
495
496 DECLARE_FLAGS(COMPILER_FLAGS)
497
498 #endif // SHARE_COMPILER_COMPILER_GLOBALS_HPP