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Diffstat (limited to 'services/audioflinger/FastThreadDumpState.cpp')
-rw-r--r-- | services/audioflinger/FastThreadDumpState.cpp | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/services/audioflinger/FastThreadDumpState.cpp b/services/audioflinger/FastThreadDumpState.cpp new file mode 100644 index 0000000..9df5c4c --- /dev/null +++ b/services/audioflinger/FastThreadDumpState.cpp @@ -0,0 +1,58 @@ +/* + * 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 |