1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <audio_utils/roundup.h>
18 #include "FastThreadDumpState.h"
19
20 namespace android {
21
FastThreadDumpState()22 FastThreadDumpState::FastThreadDumpState() :
23 mCommand(FastThreadState::INITIAL), mUnderruns(0), mOverruns(0),
24 /* mMeasuredWarmupTs({0, 0}), */
25 mWarmupCycles(0)
26 #ifdef FAST_THREAD_STATISTICS
27 , mSamplingN(0), mBounds(0)
28 #endif
29 {
30 mMeasuredWarmupTs.tv_sec = 0;
31 mMeasuredWarmupTs.tv_nsec = 0;
32 #ifdef FAST_THREAD_STATISTICS
33 increaseSamplingN(1);
34 #endif
35 }
36
~FastThreadDumpState()37 FastThreadDumpState::~FastThreadDumpState()
38 {
39 }
40
41 #ifdef FAST_THREAD_STATISTICS
increaseSamplingN(uint32_t samplingN)42 void FastThreadDumpState::increaseSamplingN(uint32_t samplingN)
43 {
44 if (samplingN <= mSamplingN || samplingN > kSamplingN || roundup(samplingN) != samplingN) {
45 return;
46 }
47 uint32_t additional = samplingN - mSamplingN;
48 // sample arrays aren't accessed atomically with respect to the bounds,
49 // so clearing reduces chance for dumpsys to read random uninitialized samples
50 memset(&mMonotonicNs[mSamplingN], 0, sizeof(mMonotonicNs[0]) * additional);
51 memset(&mLoadNs[mSamplingN], 0, sizeof(mLoadNs[0]) * additional);
52 #ifdef CPU_FREQUENCY_STATISTICS
53 memset(&mCpukHz[mSamplingN], 0, sizeof(mCpukHz[0]) * additional);
54 #endif
55 mSamplingN = samplingN;
56 }
57 #endif
58
59 } // android
60