Mon, 18 Jun 2012 12:29:21 -0700
7176856: add the JRE name to the error log
Reviewed-by: coleenp, jrose, kvn, twisti
Contributed-by: Krystal Mok <sajia@taobao.com>
1 /*
2 * Copyright (c) 2010, 2011, 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
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
25 #include "precompiled.hpp"
26 #include "compiler/compileBroker.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "runtime/arguments.hpp"
29 #include "runtime/simpleThresholdPolicy.hpp"
30 #include "runtime/simpleThresholdPolicy.inline.hpp"
31 #include "code/scopeDesc.hpp"
34 void SimpleThresholdPolicy::print_counters(const char* prefix, methodHandle mh) {
35 int invocation_count = mh->invocation_count();
36 int backedge_count = mh->backedge_count();
37 methodDataHandle mdh = mh->method_data();
38 int mdo_invocations = 0, mdo_backedges = 0;
39 int mdo_invocations_start = 0, mdo_backedges_start = 0;
40 if (mdh() != NULL) {
41 mdo_invocations = mdh->invocation_count();
42 mdo_backedges = mdh->backedge_count();
43 mdo_invocations_start = mdh->invocation_count_start();
44 mdo_backedges_start = mdh->backedge_count_start();
45 }
46 tty->print(" %stotal: %d,%d %smdo: %d(%d),%d(%d)", prefix,
47 invocation_count, backedge_count, prefix,
48 mdo_invocations, mdo_invocations_start,
49 mdo_backedges, mdo_backedges_start);
50 tty->print(" %smax levels: %d,%d", prefix,
51 mh->highest_comp_level(), mh->highest_osr_comp_level());
52 }
54 // Print an event.
55 void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh,
56 int bci, CompLevel level) {
57 bool inlinee_event = mh() != imh();
59 ttyLocker tty_lock;
60 tty->print("%lf: [", os::elapsedTime());
62 switch(type) {
63 case CALL:
64 tty->print("call");
65 break;
66 case LOOP:
67 tty->print("loop");
68 break;
69 case COMPILE:
70 tty->print("compile");
71 break;
72 case REMOVE_FROM_QUEUE:
73 tty->print("remove-from-queue");
74 break;
75 case UPDATE_IN_QUEUE:
76 tty->print("update-in-queue");
77 break;
78 case REPROFILE:
79 tty->print("reprofile");
80 break;
81 case MAKE_NOT_ENTRANT:
82 tty->print("make-not-entrant");
83 break;
84 default:
85 tty->print("unknown");
86 }
88 tty->print(" level: %d ", level);
90 ResourceMark rm;
91 char *method_name = mh->name_and_sig_as_C_string();
92 tty->print("[%s", method_name);
93 if (inlinee_event) {
94 char *inlinee_name = imh->name_and_sig_as_C_string();
95 tty->print(" [%s]] ", inlinee_name);
96 }
97 else tty->print("] ");
98 tty->print("@%d queues: %d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile),
99 CompileBroker::queue_size(CompLevel_full_optimization));
101 print_specific(type, mh, imh, bci, level);
103 if (type != COMPILE) {
104 print_counters("", mh);
105 if (inlinee_event) {
106 print_counters("inlinee ", imh);
107 }
108 tty->print(" compilable: ");
109 bool need_comma = false;
110 if (!mh->is_not_compilable(CompLevel_full_profile)) {
111 tty->print("c1");
112 need_comma = true;
113 }
114 if (!mh->is_not_compilable(CompLevel_full_optimization)) {
115 if (need_comma) tty->print(", ");
116 tty->print("c2");
117 need_comma = true;
118 }
119 if (!mh->is_not_osr_compilable()) {
120 if (need_comma) tty->print(", ");
121 tty->print("osr");
122 }
123 tty->print(" status:");
124 if (mh->queued_for_compilation()) {
125 tty->print(" in queue");
126 } else tty->print(" idle");
127 }
128 tty->print_cr("]");
129 }
131 void SimpleThresholdPolicy::initialize() {
132 if (FLAG_IS_DEFAULT(CICompilerCount)) {
133 FLAG_SET_DEFAULT(CICompilerCount, 3);
134 }
135 int count = CICompilerCount;
136 if (CICompilerCountPerCPU) {
137 count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2;
138 }
139 set_c1_count(MAX2(count / 3, 1));
140 set_c2_count(MAX2(count - count / 3, 1));
141 }
143 void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) {
144 if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) {
145 counter->set_carry_flag();
146 }
147 }
149 // Set carry flags on the counters if necessary
150 void SimpleThresholdPolicy::handle_counter_overflow(methodOop method) {
151 set_carry_if_necessary(method->invocation_counter());
152 set_carry_if_necessary(method->backedge_counter());
153 methodDataOop mdo = method->method_data();
154 if (mdo != NULL) {
155 set_carry_if_necessary(mdo->invocation_counter());
156 set_carry_if_necessary(mdo->backedge_counter());
157 }
158 }
160 // Called with the queue locked and with at least one element
161 CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) {
162 return compile_queue->first();
163 }
165 void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) {
166 for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) {
167 if (PrintTieredEvents) {
168 methodHandle mh(sd->method());
169 print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none);
170 }
171 methodDataOop mdo = sd->method()->method_data();
172 if (mdo != NULL) {
173 mdo->reset_start_counters();
174 }
175 if (sd->is_top()) break;
176 }
177 }
179 nmethod* SimpleThresholdPolicy::event(methodHandle method, methodHandle inlinee,
180 int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) {
181 if (comp_level == CompLevel_none &&
182 JvmtiExport::can_post_interpreter_events() &&
183 thread->is_interp_only_mode()) {
184 return NULL;
185 }
186 nmethod *osr_nm = NULL;
188 handle_counter_overflow(method());
189 if (method() != inlinee()) {
190 handle_counter_overflow(inlinee());
191 }
193 if (PrintTieredEvents) {
194 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level);
195 }
197 if (bci == InvocationEntryBci) {
198 method_invocation_event(method, inlinee, comp_level, nm, thread);
199 } else {
200 method_back_branch_event(method, inlinee, bci, comp_level, nm, thread);
201 // method == inlinee if the event originated in the main method
202 int highest_level = inlinee->highest_osr_comp_level();
203 if (highest_level > comp_level) {
204 osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false);
205 }
206 }
207 return osr_nm;
208 }
210 // Check if the method can be compiled, change level if necessary
211 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) {
212 assert(level <= TieredStopAtLevel, "Invalid compilation level");
213 if (level == CompLevel_none) {
214 return;
215 }
216 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling
217 // in the interpreter and then compile with C2 (the transition function will request that,
218 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with
219 // pure C1.
220 if (!can_be_compiled(mh, level)) {
221 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) {
222 compile(mh, bci, CompLevel_simple, thread);
223 }
224 return;
225 }
226 if (bci != InvocationEntryBci && mh->is_not_osr_compilable()) {
227 return;
228 }
229 if (!CompileBroker::compilation_is_in_queue(mh, bci)) {
230 if (PrintTieredEvents) {
231 print_event(COMPILE, mh, mh, bci, level);
232 }
233 submit_compile(mh, bci, level, thread);
234 }
235 }
237 // Tell the broker to compile the method
238 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) {
239 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count();
240 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread);
241 }
243 // Call and loop predicates determine whether a transition to a higher
244 // compilation level should be performed (pointers to predicate functions
245 // are passed to common() transition function).
246 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) {
247 switch(cur_level) {
248 case CompLevel_none:
249 case CompLevel_limited_profile: {
250 return loop_predicate_helper<CompLevel_none>(i, b, 1.0);
251 }
252 case CompLevel_full_profile: {
253 return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0);
254 }
255 default:
256 return true;
257 }
258 }
260 bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) {
261 switch(cur_level) {
262 case CompLevel_none:
263 case CompLevel_limited_profile: {
264 return call_predicate_helper<CompLevel_none>(i, b, 1.0);
265 }
266 case CompLevel_full_profile: {
267 return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0);
268 }
269 default:
270 return true;
271 }
272 }
274 // Determine is a method is mature.
275 bool SimpleThresholdPolicy::is_mature(methodOop method) {
276 if (is_trivial(method)) return true;
277 methodDataOop mdo = method->method_data();
278 if (mdo != NULL) {
279 int i = mdo->invocation_count();
280 int b = mdo->backedge_count();
281 double k = ProfileMaturityPercentage / 100.0;
282 return call_predicate_helper<CompLevel_full_profile>(i, b, k) ||
283 loop_predicate_helper<CompLevel_full_profile>(i, b, k);
284 }
285 return false;
286 }
288 // Common transition function. Given a predicate determines if a method should transition to another level.
289 CompLevel SimpleThresholdPolicy::common(Predicate p, methodOop method, CompLevel cur_level) {
290 CompLevel next_level = cur_level;
291 int i = method->invocation_count();
292 int b = method->backedge_count();
294 if (is_trivial(method)) {
295 next_level = CompLevel_simple;
296 } else {
297 switch(cur_level) {
298 case CompLevel_none:
299 // If we were at full profile level, would we switch to full opt?
300 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) {
301 next_level = CompLevel_full_optimization;
302 } else if ((this->*p)(i, b, cur_level)) {
303 next_level = CompLevel_full_profile;
304 }
305 break;
306 case CompLevel_limited_profile:
307 case CompLevel_full_profile:
308 {
309 methodDataOop mdo = method->method_data();
310 if (mdo != NULL) {
311 if (mdo->would_profile()) {
312 int mdo_i = mdo->invocation_count_delta();
313 int mdo_b = mdo->backedge_count_delta();
314 if ((this->*p)(mdo_i, mdo_b, cur_level)) {
315 next_level = CompLevel_full_optimization;
316 }
317 } else {
318 next_level = CompLevel_full_optimization;
319 }
320 }
321 }
322 break;
323 }
324 }
325 return MIN2(next_level, (CompLevel)TieredStopAtLevel);
326 }
328 // Determine if a method should be compiled with a normal entry point at a different level.
329 CompLevel SimpleThresholdPolicy::call_event(methodOop method, CompLevel cur_level) {
330 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(),
331 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level));
332 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level);
334 // If OSR method level is greater than the regular method level, the levels should be
335 // equalized by raising the regular method level in order to avoid OSRs during each
336 // invocation of the method.
337 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) {
338 methodDataOop mdo = method->method_data();
339 guarantee(mdo != NULL, "MDO should not be NULL");
340 if (mdo->invocation_count() >= 1) {
341 next_level = CompLevel_full_optimization;
342 }
343 } else {
344 next_level = MAX2(osr_level, next_level);
345 }
347 return next_level;
348 }
350 // Determine if we should do an OSR compilation of a given method.
351 CompLevel SimpleThresholdPolicy::loop_event(methodOop method, CompLevel cur_level) {
352 CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level);
353 if (cur_level == CompLevel_none) {
354 // If there is a live OSR method that means that we deopted to the interpreter
355 // for the transition.
356 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level);
357 if (osr_level > CompLevel_none) {
358 return osr_level;
359 }
360 }
361 return next_level;
362 }
365 // Handle the invocation event.
366 void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh,
367 CompLevel level, nmethod* nm, JavaThread* thread) {
368 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) {
369 CompLevel next_level = call_event(mh(), level);
370 if (next_level != level) {
371 compile(mh, InvocationEntryBci, next_level, thread);
372 }
373 }
374 }
376 // Handle the back branch event. Notice that we can compile the method
377 // with a regular entry from here.
378 void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh,
379 int bci, CompLevel level, nmethod* nm, JavaThread* thread) {
380 // If the method is already compiling, quickly bail out.
381 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, bci)) {
382 // Use loop event as an opportinity to also check there's been
383 // enough calls.
384 CompLevel cur_level = comp_level(mh());
385 CompLevel next_level = call_event(mh(), cur_level);
386 CompLevel next_osr_level = loop_event(mh(), level);
388 next_level = MAX2(next_level,
389 next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level);
390 bool is_compiling = false;
391 if (next_level != cur_level) {
392 compile(mh, InvocationEntryBci, next_level, thread);
393 is_compiling = true;
394 }
396 // Do the OSR version
397 if (!is_compiling && next_osr_level != level) {
398 compile(mh, bci, next_osr_level, thread);
399 }
400 }
401 }