jit_instrumentation.cc revision e5f13e57ff8fa36342beb33830b3ec5942a61cca
1e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier/* 2e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * Copyright 2014 The Android Open Source Project 3e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * 4e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * Licensed under the Apache License, Version 2.0 (the "License"); 5e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * you may not use this file except in compliance with the License. 6e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * You may obtain a copy of the License at 7e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * 8e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * http://www.apache.org/licenses/LICENSE-2.0 9e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * 10e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * Unless required by applicable law or agreed to in writing, software 11e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * distributed under the License is distributed on an "AS IS" BASIS, 12e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * See the License for the specific language governing permissions and 14e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier * limitations under the License. 15e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier */ 16e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 17e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier#include "jit_instrumentation.h" 18e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 19e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier#include "jit.h" 20e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier#include "jit_code_cache.h" 21e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier#include "mirror/art_method-inl.h" 22e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier#include "scoped_thread_state_change.h" 23e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 24e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartiernamespace art { 25e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartiernamespace jit { 26e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 27e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartierclass JitCompileTask : public Task { 28e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier public: 29e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier explicit JitCompileTask(mirror::ArtMethod* method, JitInstrumentationCache* cache) 30e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier : method_(method), cache_(cache) { 31e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 32e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 33e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier virtual void Run(Thread* self) OVERRIDE { 34e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier ScopedObjectAccess soa(self); 35e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier VLOG(jit) << "JitCompileTask compiling method " << PrettyMethod(method_); 36e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier if (Runtime::Current()->GetJit()->CompileMethod(method_, self)) { 37e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier cache_->SignalCompiled(self, method_); 38e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } else { 39e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier VLOG(jit) << "Failed to compile method " << PrettyMethod(method_); 40e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 41e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 42e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 43e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier virtual void Finalize() OVERRIDE { 44e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier delete this; 45e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 46e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 47e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier private: 48e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier mirror::ArtMethod* const method_; 49e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier JitInstrumentationCache* const cache_; 50e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier}; 51e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 52e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu ChartierJitInstrumentationCache::JitInstrumentationCache(size_t hot_method_threshold) 53e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier : lock_("jit instrumentation lock"), hot_method_threshold_(hot_method_threshold) { 54e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} 55e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 56e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartiervoid JitInstrumentationCache::CreateThreadPool() { 57e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier thread_pool_.reset(new ThreadPool("Jit thread pool", 1)); 58e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} 59e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 60e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartiervoid JitInstrumentationCache::DeleteThreadPool() { 61e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier thread_pool_.reset(); 62e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} 63e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 64e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartiervoid JitInstrumentationCache::SignalCompiled(Thread* self, mirror::ArtMethod* method) { 65e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier ScopedObjectAccessUnchecked soa(self); 66e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier jmethodID method_id = soa.EncodeMethod(method); 67e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier MutexLock mu(self, lock_); 68e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier auto it = samples_.find(method_id); 69e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier if (it != samples_.end()) { 70e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier samples_.erase(it); 71e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 72e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} 73e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 74e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartiervoid JitInstrumentationCache::AddSamples(Thread* self, mirror::ArtMethod* method, size_t count) { 75e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier ScopedObjectAccessUnchecked soa(self); 76e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier // Since we don't have on-stack replacement, some methods can remain in the interpreter longer 77e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier // than we want resulting in samples even after the method is compiled. 78e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier if (method->IsClassInitializer() || 79e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier Runtime::Current()->GetJit()->GetCodeCache()->ContainsMethod(method)) { 80e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier return; 81e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 82e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier jmethodID method_id = soa.EncodeMethod(method); 83e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier bool is_hot = false; 84e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier { 85e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier MutexLock mu(self, lock_); 86e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier size_t sample_count = 0; 87e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier auto it = samples_.find(method_id); 88e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier if (it != samples_.end()) { 89e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier it->second += count; 90e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier sample_count = it->second; 91e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } else { 92e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier sample_count = count; 93e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier samples_.insert(std::make_pair(method_id, count)); 94e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 95e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier // If we have enough samples, mark as hot and request Jit compilation. 96e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier if (sample_count >= hot_method_threshold_ && sample_count - count < hot_method_threshold_) { 97e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier is_hot = true; 98e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 99e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 100e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier if (is_hot) { 101e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier if (thread_pool_.get() != nullptr) { 102e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier thread_pool_->AddTask(self, new JitCompileTask(method->GetInterfaceMethodIfProxy(), this)); 103e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier thread_pool_->StartWorkers(self); 104e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } else { 105e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier VLOG(jit) << "Compiling hot method " << PrettyMethod(method); 106e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier Runtime::Current()->GetJit()->CompileMethod(method->GetInterfaceMethodIfProxy(), self); 107e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 108e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier } 109e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} 110e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 111e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu ChartierJitInstrumentationListener::JitInstrumentationListener(JitInstrumentationCache* cache) 112e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier : instrumentation_cache_(cache) { 113e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier CHECK(instrumentation_cache_ != nullptr); 114e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} 115e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier 116e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} // namespace jit 117e5f13e57ff8fa36342beb33830b3ec5942a61ccaMathieu Chartier} // namespace art 118