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/*
* Copyright (C) 2014 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.
*/
#include "FastThreadDumpState.h"
namespace android {
FastThreadDumpState::FastThreadDumpState() :
mCommand(FastThreadState::INITIAL), mUnderruns(0), mOverruns(0),
/* mMeasuredWarmupTs({0, 0}), */
mWarmupCycles(0)
#ifdef FAST_THREAD_STATISTICS
, mSamplingN(0), mBounds(0)
#endif
{
mMeasuredWarmupTs.tv_sec = 0;
mMeasuredWarmupTs.tv_nsec = 0;
#ifdef FAST_THREAD_STATISTICS
increaseSamplingN(1);
#endif
}
FastThreadDumpState::~FastThreadDumpState()
{
}
#ifdef FAST_THREAD_STATISTICS
void FastThreadDumpState::increaseSamplingN(uint32_t samplingN)
{
if (samplingN <= mSamplingN || samplingN > kSamplingN || roundup(samplingN) != samplingN) {
return;
}
uint32_t additional = samplingN - mSamplingN;
// sample arrays aren't accessed atomically with respect to the bounds,
// so clearing reduces chance for dumpsys to read random uninitialized samples
memset(&mMonotonicNs[mSamplingN], 0, sizeof(mMonotonicNs[0]) * additional);
memset(&mLoadNs[mSamplingN], 0, sizeof(mLoadNs[0]) * additional);
#ifdef CPU_FREQUENCY_STATISTICS
memset(&mCpukHz[mSamplingN], 0, sizeof(mCpukHz[0]) * additional);
#endif
mSamplingN = samplingN;
}
#endif
} // android
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