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