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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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95 | 95 |
96 void RuntimeProfiler::GlobalSetup() { | 96 void RuntimeProfiler::GlobalSetup() { |
97 ASSERT(!has_been_globally_set_up_); | 97 ASSERT(!has_been_globally_set_up_); |
98 enabled_ = V8::UseCrankshaft() && FLAG_opt; | 98 enabled_ = V8::UseCrankshaft() && FLAG_opt; |
99 #ifdef DEBUG | 99 #ifdef DEBUG |
100 has_been_globally_set_up_ = true; | 100 has_been_globally_set_up_ = true; |
101 #endif | 101 #endif |
102 } | 102 } |
103 | 103 |
104 | 104 |
| 105 static void GetICCounts(JSFunction* function, |
| 106 int* ic_with_typeinfo_count, |
| 107 int* ic_total_count, |
| 108 int* percentage) { |
| 109 *ic_total_count = 0; |
| 110 *ic_with_typeinfo_count = 0; |
| 111 Object* raw_info = |
| 112 function->shared()->code()->type_feedback_info(); |
| 113 if (raw_info->IsTypeFeedbackInfo()) { |
| 114 TypeFeedbackInfo* info = TypeFeedbackInfo::cast(raw_info); |
| 115 *ic_with_typeinfo_count = info->ic_with_typeinfo_count(); |
| 116 *ic_total_count = info->ic_total_count(); |
| 117 } |
| 118 *percentage = *ic_total_count > 0 |
| 119 ? 100 * *ic_with_typeinfo_count / *ic_total_count |
| 120 : 100; |
| 121 } |
| 122 |
| 123 |
105 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) { | 124 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) { |
106 ASSERT(function->IsOptimizable()); | 125 ASSERT(function->IsOptimizable()); |
107 if (FLAG_trace_opt) { | 126 if (FLAG_trace_opt) { |
108 PrintF("[marking "); | 127 PrintF("[marking "); |
109 function->PrintName(); | 128 function->PrintName(); |
110 PrintF(" 0x%" V8PRIxPTR, reinterpret_cast<intptr_t>(function->address())); | 129 PrintF(" 0x%" V8PRIxPTR, reinterpret_cast<intptr_t>(function->address())); |
111 PrintF(" for recompilation, reason: %s", reason); | 130 PrintF(" for recompilation, reason: %s", reason); |
| 131 if (FLAG_type_info_threshold > 0) { |
| 132 int typeinfo, total, percentage; |
| 133 GetICCounts(function, &typeinfo, &total, &percentage); |
| 134 PrintF(", ICs with typeinfo: %d/%d (%d%%)", typeinfo, total, percentage); |
| 135 } |
112 PrintF("]\n"); | 136 PrintF("]\n"); |
113 } | 137 } |
114 | 138 |
115 // The next call to the function will trigger optimization. | 139 // The next call to the function will trigger optimization. |
116 function->MarkForLazyRecompilation(); | 140 function->MarkForLazyRecompilation(); |
117 } | 141 } |
118 | 142 |
119 | 143 |
120 void RuntimeProfiler::AttemptOnStackReplacement(JSFunction* function) { | 144 void RuntimeProfiler::AttemptOnStackReplacement(JSFunction* function) { |
121 // See AlwaysFullCompiler (in compiler.cc) comment on why we need | 145 // See AlwaysFullCompiler (in compiler.cc) comment on why we need |
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251 if (function->shared()->is_toplevel() | 275 if (function->shared()->is_toplevel() |
252 && (frame_count > 1 | 276 && (frame_count > 1 |
253 || function->shared()->SourceSize() > kMaxToplevelSourceSize)) { | 277 || function->shared()->SourceSize() > kMaxToplevelSourceSize)) { |
254 continue; | 278 continue; |
255 } | 279 } |
256 | 280 |
257 if (FLAG_watch_ic_patching) { | 281 if (FLAG_watch_ic_patching) { |
258 int ticks = function->shared()->profiler_ticks(); | 282 int ticks = function->shared()->profiler_ticks(); |
259 | 283 |
260 if (ticks >= kProfilerTicksBeforeOptimization) { | 284 if (ticks >= kProfilerTicksBeforeOptimization) { |
261 // If this particular function hasn't had any ICs patched for enough | 285 int typeinfo, total, percentage; |
262 // ticks, optimize it now. | 286 GetICCounts(function, &typeinfo, &total, &percentage); |
263 Optimize(function, "hot and stable"); | 287 if (percentage >= FLAG_type_info_threshold) { |
| 288 // If this particular function hasn't had any ICs patched for enough |
| 289 // ticks, optimize it now. |
| 290 Optimize(function, "hot and stable"); |
| 291 } else { |
| 292 if (FLAG_trace_opt_verbose) { |
| 293 PrintF("[not yet optimizing "); |
| 294 function->PrintName(); |
| 295 PrintF(", not enough type info: %d/%d (%d%%)]\n", |
| 296 typeinfo, total, percentage); |
| 297 } |
| 298 } |
264 } else if (!any_ic_changed_ && | 299 } else if (!any_ic_changed_ && |
265 function->shared()->code()->instruction_size() < kMaxSizeEarlyOpt) { | 300 function->shared()->code()->instruction_size() < kMaxSizeEarlyOpt) { |
266 // If no IC was patched since the last tick and this function is very | 301 // If no IC was patched since the last tick and this function is very |
267 // small, optimistically optimize it now. | 302 // small, optimistically optimize it now. |
268 Optimize(function, "small function"); | 303 Optimize(function, "small function"); |
269 } else if (!code_generated_ && | 304 } else if (!code_generated_ && |
270 !any_ic_changed_ && | 305 !any_ic_changed_ && |
271 total_code_generated_ > 0 && | 306 total_code_generated_ > 0 && |
272 total_code_generated_ < 2000) { | 307 total_code_generated_ < 2000) { |
273 // If no code was generated and no IC was patched since the last tick, | 308 // If no code was generated and no IC was patched since the last tick, |
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430 | 465 |
431 bool RuntimeProfilerRateLimiter::SuspendIfNecessary() { | 466 bool RuntimeProfilerRateLimiter::SuspendIfNecessary() { |
432 if (!RuntimeProfiler::IsSomeIsolateInJS()) { | 467 if (!RuntimeProfiler::IsSomeIsolateInJS()) { |
433 return RuntimeProfiler::WaitForSomeIsolateToEnterJS(); | 468 return RuntimeProfiler::WaitForSomeIsolateToEnterJS(); |
434 } | 469 } |
435 return false; | 470 return false; |
436 } | 471 } |
437 | 472 |
438 | 473 |
439 } } // namespace v8::internal | 474 } } // namespace v8::internal |
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