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Issue 9360041: Small update to experimental profiler flags (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 10 months ago
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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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