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-rw-r--r--services/audioflinger/FastThreadDumpState.cpp58
1 files changed, 58 insertions, 0 deletions
diff --git a/services/audioflinger/FastThreadDumpState.cpp b/services/audioflinger/FastThreadDumpState.cpp
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+++ b/services/audioflinger/FastThreadDumpState.cpp
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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