189
190 if (PrintTieredEvents) {
191 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level);
192 }
193
194 if (bci == InvocationEntryBci) {
195 method_invocation_event(method, inlinee, comp_level, nm, THREAD);
196 } else {
197 method_back_branch_event(method, inlinee, bci, comp_level, nm, THREAD);
198 // method == inlinee if the event originated in the main method
199 int highest_level = inlinee->highest_osr_comp_level();
200 if (highest_level > comp_level) {
201 osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false);
202 }
203 }
204 return osr_nm;
205 }
206
207 // Check if the method can be compiled, change level if necessary
208 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, TRAPS) {
209 // Take the given ceiling into the account.
210 // NOTE: You can set it to 1 to get a pure C1 version.
211 if ((CompLevel)TieredStopAtLevel < level) {
212 level = (CompLevel)TieredStopAtLevel;
213 }
214 if (level == CompLevel_none) {
215 return;
216 }
217 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling
218 // in the interpreter and then compile with C2 (the transition function will request that,
219 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with
220 // pure C1.
221 if (!can_be_compiled(mh, level)) {
222 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) {
223 compile(mh, bci, CompLevel_simple, THREAD);
224 }
225 return;
226 }
227 if (bci != InvocationEntryBci && mh->is_not_osr_compilable()) {
228 return;
229 }
230 if (PrintTieredEvents) {
231 print_event(COMPILE, mh, mh, bci, level);
232 }
233 if (!CompileBroker::compilation_is_in_queue(mh, bci)) {
234 submit_compile(mh, bci, level, THREAD);
235 }
236 }
237
238 // Tell the broker to compile the method
239 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, TRAPS) {
240 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count();
241 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", THREAD);
242 }
243
244 // Call and loop predicates determine whether a transition to a higher
245 // compilation level should be performed (pointers to predicate functions
246 // are passed to common() transition function).
247 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) {
248 switch(cur_level) {
249 case CompLevel_none:
250 case CompLevel_limited_profile: {
251 return loop_predicate_helper<CompLevel_none>(i, b, 1.0);
252 }
253 case CompLevel_full_profile: {
271 return true;
272 }
273 }
274
275 // Determine is a method is mature.
276 bool SimpleThresholdPolicy::is_mature(methodOop method) {
277 if (is_trivial(method)) return true;
278 methodDataOop mdo = method->method_data();
279 if (mdo != NULL) {
280 int i = mdo->invocation_count();
281 int b = mdo->backedge_count();
282 double k = ProfileMaturityPercentage / 100.0;
283 return call_predicate_helper<CompLevel_full_profile>(i, b, k) ||
284 loop_predicate_helper<CompLevel_full_profile>(i, b, k);
285 }
286 return false;
287 }
288
289 // Common transition function. Given a predicate determines if a method should transition to another level.
290 CompLevel SimpleThresholdPolicy::common(Predicate p, methodOop method, CompLevel cur_level) {
291 if (is_trivial(method)) return CompLevel_simple;
292
293 CompLevel next_level = cur_level;
294 int i = method->invocation_count();
295 int b = method->backedge_count();
296
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 return next_level;
325 }
326
327 // Determine if a method should be compiled with a normal entry point at a different level.
328 CompLevel SimpleThresholdPolicy::call_event(methodOop method, CompLevel cur_level) {
329 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(),
330 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level));
331 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level);
332
333 // If OSR method level is greater than the regular method level, the levels should be
334 // equalized by raising the regular method level in order to avoid OSRs during each
335 // invocation of the method.
336 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) {
337 methodDataOop mdo = method->method_data();
338 guarantee(mdo != NULL, "MDO should not be NULL");
339 if (mdo->invocation_count() >= 1) {
340 next_level = CompLevel_full_optimization;
341 }
342 } else {
343 next_level = MAX2(osr_level, next_level);
344 }
|
189
190 if (PrintTieredEvents) {
191 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level);
192 }
193
194 if (bci == InvocationEntryBci) {
195 method_invocation_event(method, inlinee, comp_level, nm, THREAD);
196 } else {
197 method_back_branch_event(method, inlinee, bci, comp_level, nm, THREAD);
198 // method == inlinee if the event originated in the main method
199 int highest_level = inlinee->highest_osr_comp_level();
200 if (highest_level > comp_level) {
201 osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false);
202 }
203 }
204 return osr_nm;
205 }
206
207 // Check if the method can be compiled, change level if necessary
208 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, TRAPS) {
209 assert(level <= TieredStopAtLevel, "Invalid compilation level");
210 if (level == CompLevel_none) {
211 return;
212 }
213 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling
214 // in the interpreter and then compile with C2 (the transition function will request that,
215 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with
216 // pure C1.
217 if (!can_be_compiled(mh, level)) {
218 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) {
219 compile(mh, bci, CompLevel_simple, THREAD);
220 }
221 return;
222 }
223 if (bci != InvocationEntryBci && mh->is_not_osr_compilable()) {
224 return;
225 }
226 if (!CompileBroker::compilation_is_in_queue(mh, bci)) {
227 if (PrintTieredEvents) {
228 print_event(COMPILE, mh, mh, bci, level);
229 }
230 submit_compile(mh, bci, level, THREAD);
231 }
232 }
233
234 // Tell the broker to compile the method
235 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, TRAPS) {
236 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count();
237 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", THREAD);
238 }
239
240 // Call and loop predicates determine whether a transition to a higher
241 // compilation level should be performed (pointers to predicate functions
242 // are passed to common() transition function).
243 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) {
244 switch(cur_level) {
245 case CompLevel_none:
246 case CompLevel_limited_profile: {
247 return loop_predicate_helper<CompLevel_none>(i, b, 1.0);
248 }
249 case CompLevel_full_profile: {
267 return true;
268 }
269 }
270
271 // Determine is a method is mature.
272 bool SimpleThresholdPolicy::is_mature(methodOop method) {
273 if (is_trivial(method)) return true;
274 methodDataOop mdo = method->method_data();
275 if (mdo != NULL) {
276 int i = mdo->invocation_count();
277 int b = mdo->backedge_count();
278 double k = ProfileMaturityPercentage / 100.0;
279 return call_predicate_helper<CompLevel_full_profile>(i, b, k) ||
280 loop_predicate_helper<CompLevel_full_profile>(i, b, k);
281 }
282 return false;
283 }
284
285 // Common transition function. Given a predicate determines if a method should transition to another level.
286 CompLevel SimpleThresholdPolicy::common(Predicate p, methodOop method, CompLevel cur_level) {
287 CompLevel next_level = cur_level;
288 int i = method->invocation_count();
289 int b = method->backedge_count();
290
291 if (is_trivial(method)) {
292 next_level = CompLevel_simple;
293 } else {
294 switch(cur_level) {
295 case CompLevel_none:
296 // If we were at full profile level, would we switch to full opt?
297 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) {
298 next_level = CompLevel_full_optimization;
299 } else if ((this->*p)(i, b, cur_level)) {
300 next_level = CompLevel_full_profile;
301 }
302 break;
303 case CompLevel_limited_profile:
304 case CompLevel_full_profile:
305 {
306 methodDataOop mdo = method->method_data();
307 if (mdo != NULL) {
308 if (mdo->would_profile()) {
309 int mdo_i = mdo->invocation_count_delta();
310 int mdo_b = mdo->backedge_count_delta();
311 if ((this->*p)(mdo_i, mdo_b, cur_level)) {
312 next_level = CompLevel_full_optimization;
313 }
314 } else {
315 next_level = CompLevel_full_optimization;
316 }
317 }
318 }
319 break;
320 }
321 }
322 return MIN2(next_level, (CompLevel)TieredStopAtLevel);
323 }
324
325 // Determine if a method should be compiled with a normal entry point at a different level.
326 CompLevel SimpleThresholdPolicy::call_event(methodOop method, CompLevel cur_level) {
327 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(),
328 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level));
329 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level);
330
331 // If OSR method level is greater than the regular method level, the levels should be
332 // equalized by raising the regular method level in order to avoid OSRs during each
333 // invocation of the method.
334 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) {
335 methodDataOop mdo = method->method_data();
336 guarantee(mdo != NULL, "MDO should not be NULL");
337 if (mdo->invocation_count() >= 1) {
338 next_level = CompLevel_full_optimization;
339 }
340 } else {
341 next_level = MAX2(osr_level, next_level);
342 }
|