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31 lines
1.1 KiB
31 lines
1.1 KiB
/* |
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* Copyright (C) 2016 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 SIMPLE_PERF_PERF_CLOCK_H_ |
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#define SIMPLE_PERF_PERF_CLOCK_H_ |
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#include <stdint.h> |
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// Perf clock is the clock used by the kernel to generate timestamps in perf |
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// event records. We use a separate init function because it allocates a mapped |
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// buffer for perf event file, which might not be available during profiling. |
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// And we'd better call the init function before profiling. |
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// InitPerfClock() must be called before GetPerfClock(). |
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bool InitPerfClock(); |
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uint64_t GetPerfClock(); |
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#endif // SIMPLE_PERF_PERF_CLOCK_H_
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