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/*
* Copyright 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_JIT_JIT_INL_H_
#define ART_RUNTIME_JIT_JIT_INL_H_
#include "jit/jit.h"
#include "art_method.h"
#include "base/bit_utils.h"
#include "thread.h"
#include "runtime-inl.h"
namespace art {
namespace jit {
inline bool Jit::ShouldUsePriorityThreadWeight(Thread* self) {
return self->IsJitSensitiveThread() && Runtime::Current()->InJankPerceptibleProcessState();
}
inline void Jit::AddSamples(Thread* self,
ArtMethod* method,
uint16_t samples,
bool with_backedges) {
if (Jit::ShouldUsePriorityThreadWeight(self)) {
samples *= PriorityThreadWeight();
}
uint32_t old_count = method->GetCounter();
uint32_t new_count = old_count + samples;
// The full check is fairly expensive so we just add to hotness most of the time,
// and we do the full check only when some of the higher bits of the count change.
// NB: The method needs to see the transitions of the counter past the thresholds.
uint32_t old_batch = RoundDown(old_count, kJitSamplesBatchSize); // Clear lower bits.
uint32_t new_batch = RoundDown(new_count, kJitSamplesBatchSize); // Clear lower bits.
if (UNLIKELY(kSlowMode)) { // Check every time in slow-debug mode.
if (!MaybeCompileMethod(self, method, old_count, new_count, with_backedges)) {
// Tests may check that the counter is 0 for methods that we never compile.
return; // Ignore the samples for now and retry later.
}
} else if (UNLIKELY(old_batch != new_batch)) {
if (!MaybeCompileMethod(self, method, old_batch, new_batch, with_backedges)) {
// OSR compilation will ignore the samples if they don't have backedges.
return; // Ignore the samples for now and retry later.
}
}
method->SetCounter(new_count);
}
} // namespace jit
} // namespace art
#endif // ART_RUNTIME_JIT_JIT_INL_H_
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