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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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102 } | 102 } |
103 | 103 |
104 | 104 |
105 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) { | 105 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) { |
106 ASSERT(function->IsOptimizable()); | 106 ASSERT(function->IsOptimizable()); |
107 if (FLAG_trace_opt) { | 107 if (FLAG_trace_opt) { |
108 PrintF("[marking "); | 108 PrintF("[marking "); |
109 function->PrintName(); | 109 function->PrintName(); |
110 PrintF(" 0x%" V8PRIxPTR, reinterpret_cast<intptr_t>(function->address())); | 110 PrintF(" 0x%" V8PRIxPTR, reinterpret_cast<intptr_t>(function->address())); |
111 PrintF(" for recompilation, reason: %s", reason); | 111 PrintF(" for recompilation, reason: %s", reason); |
112 int typeinfo = function->shared()->ic_typeinfo_count(); | |
113 int total = function->shared()->ic_total_count(); | |
114 PrintF(", ICs with typeinfo: %d/%d (%d%%)", | |
Vyacheslav Egorov (Chromium)
2012/02/15 12:07:39
I sense SIGFPE here for code objects without ICs.
Jakob Kummerow
2012/02/17 16:07:52
Done.
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115 typeinfo, total, (100*typeinfo/total)); | |
112 PrintF("]\n"); | 116 PrintF("]\n"); |
113 } | 117 } |
114 | 118 |
115 // The next call to the function will trigger optimization. | 119 // The next call to the function will trigger optimization. |
116 function->MarkForLazyRecompilation(); | 120 function->MarkForLazyRecompilation(); |
117 } | 121 } |
118 | 122 |
119 | 123 |
120 void RuntimeProfiler::AttemptOnStackReplacement(JSFunction* function) { | 124 void RuntimeProfiler::AttemptOnStackReplacement(JSFunction* function) { |
121 // See AlwaysFullCompiler (in compiler.cc) comment on why we need | 125 // See AlwaysFullCompiler (in compiler.cc) comment on why we need |
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251 if (function->shared()->is_toplevel() | 255 if (function->shared()->is_toplevel() |
252 && (frame_count > 1 | 256 && (frame_count > 1 |
253 || function->shared()->SourceSize() > kMaxToplevelSourceSize)) { | 257 || function->shared()->SourceSize() > kMaxToplevelSourceSize)) { |
254 continue; | 258 continue; |
255 } | 259 } |
256 | 260 |
257 if (FLAG_watch_ic_patching) { | 261 if (FLAG_watch_ic_patching) { |
258 int ticks = function->shared()->profiler_ticks(); | 262 int ticks = function->shared()->profiler_ticks(); |
259 | 263 |
260 if (ticks >= kProfilerTicksBeforeOptimization) { | 264 if (ticks >= kProfilerTicksBeforeOptimization) { |
261 // If this particular function hasn't had any ICs patched for enough | 265 int ic_typeinfo = function->shared()->ic_typeinfo_count(); |
Vyacheslav Egorov (Chromium)
2012/02/15 12:07:39
I would rename ic_typeinfo_count into ic_with_type
Jakob Kummerow
2012/02/17 16:07:52
Done.
| |
262 // ticks, optimize it now. | 266 int ic_total = function->shared()->ic_total_count(); |
263 Optimize(function, "hot and stable"); | 267 int percentage = 100 * ic_typeinfo / ic_total; |
Vyacheslav Egorov (Chromium)
2012/02/15 12:07:39
I sense SIGFPE here for code objects without ICs.
Jakob Kummerow
2012/02/17 16:07:52
Done.
| |
268 if (percentage >= FLAG_type_info_threshold) { | |
269 // If this particular function hasn't had any ICs patched for enough | |
270 // ticks, optimize it now. | |
271 Optimize(function, "hot and stable"); | |
272 } else { | |
273 if (FLAG_trace_opt_verbose) { | |
274 PrintF("[not yet optimizing "); | |
275 function->PrintName(); | |
276 PrintF(", not enough type info: %d/%d (%d%%)]\n", | |
277 ic_typeinfo, ic_total, percentage); | |
278 } | |
279 } | |
264 } else if (!any_ic_changed_ && | 280 } else if (!any_ic_changed_ && |
265 function->shared()->code()->instruction_size() < kMaxSizeEarlyOpt) { | 281 function->shared()->code()->instruction_size() < kMaxSizeEarlyOpt) { |
266 // If no IC was patched since the last tick and this function is very | 282 // If no IC was patched since the last tick and this function is very |
267 // small, optimistically optimize it now. | 283 // small, optimistically optimize it now. |
268 Optimize(function, "small function"); | 284 Optimize(function, "small function"); |
269 } else if (!code_generated_ && | 285 } else if (!code_generated_ && |
270 !any_ic_changed_ && | 286 !any_ic_changed_ && |
271 total_code_generated_ > 0 && | 287 total_code_generated_ > 0 && |
272 total_code_generated_ < 2000) { | 288 total_code_generated_ < 2000) { |
273 // If no code was generated and no IC was patched since the last tick, | 289 // If no code was generated and no IC was patched since the last tick, |
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430 | 446 |
431 bool RuntimeProfilerRateLimiter::SuspendIfNecessary() { | 447 bool RuntimeProfilerRateLimiter::SuspendIfNecessary() { |
432 if (!RuntimeProfiler::IsSomeIsolateInJS()) { | 448 if (!RuntimeProfiler::IsSomeIsolateInJS()) { |
433 return RuntimeProfiler::WaitForSomeIsolateToEnterJS(); | 449 return RuntimeProfiler::WaitForSomeIsolateToEnterJS(); |
434 } | 450 } |
435 return false; | 451 return false; |
436 } | 452 } |
437 | 453 |
438 | 454 |
439 } } // namespace v8::internal | 455 } } // namespace v8::internal |
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