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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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| 198 | 198 | 
| 199 void RuntimeProfiler::OptimizeNow() { | 199 void RuntimeProfiler::OptimizeNow() { | 
| 200   HandleScope scope(isolate_); | 200   HandleScope scope(isolate_); | 
| 201 | 201 | 
| 202   // Run through the JavaScript frames and collect them. If we already | 202   // Run through the JavaScript frames and collect them. If we already | 
| 203   // have a sample of the function, we mark it for optimizations | 203   // have a sample of the function, we mark it for optimizations | 
| 204   // (eagerly or lazily). | 204   // (eagerly or lazily). | 
| 205   JSFunction* samples[kSamplerFrameCount]; | 205   JSFunction* samples[kSamplerFrameCount]; | 
| 206   int sample_count = 0; | 206   int sample_count = 0; | 
| 207   int frame_count = 0; | 207   int frame_count = 0; | 
|  | 208   int frame_count_limit = FLAG_watch_ic_patching ? FLAG_frame_count | 
|  | 209                                                  : kSamplerFrameCount; | 
| 208   for (JavaScriptFrameIterator it(isolate_); | 210   for (JavaScriptFrameIterator it(isolate_); | 
| 209        frame_count++ < kSamplerFrameCount && !it.done(); | 211        frame_count++ < frame_count_limit && !it.done(); | 
| 210        it.Advance()) { | 212        it.Advance()) { | 
| 211     JavaScriptFrame* frame = it.frame(); | 213     JavaScriptFrame* frame = it.frame(); | 
| 212     JSFunction* function = JSFunction::cast(frame->function()); | 214     JSFunction* function = JSFunction::cast(frame->function()); | 
| 213 | 215 | 
| 214     if (!FLAG_watch_ic_patching) { | 216     if (!FLAG_watch_ic_patching) { | 
| 215       // Adjust threshold each time we have processed | 217       // Adjust threshold each time we have processed | 
| 216       // a certain number of ticks. | 218       // a certain number of ticks. | 
| 217       if (sampler_ticks_until_threshold_adjustment_ > 0) { | 219       if (sampler_ticks_until_threshold_adjustment_ > 0) { | 
| 218         sampler_ticks_until_threshold_adjustment_--; | 220         sampler_ticks_until_threshold_adjustment_--; | 
| 219         if (sampler_ticks_until_threshold_adjustment_ <= 0) { | 221         if (sampler_ticks_until_threshold_adjustment_ <= 0) { | 
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| 423 | 425 | 
| 424 bool RuntimeProfilerRateLimiter::SuspendIfNecessary() { | 426 bool RuntimeProfilerRateLimiter::SuspendIfNecessary() { | 
| 425   if (!RuntimeProfiler::IsSomeIsolateInJS()) { | 427   if (!RuntimeProfiler::IsSomeIsolateInJS()) { | 
| 426     return RuntimeProfiler::WaitForSomeIsolateToEnterJS(); | 428     return RuntimeProfiler::WaitForSomeIsolateToEnterJS(); | 
| 427   } | 429   } | 
| 428   return false; | 430   return false; | 
| 429 } | 431 } | 
| 430 | 432 | 
| 431 | 433 | 
| 432 } }  // namespace v8::internal | 434 } }  // namespace v8::internal | 
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