1 /*
2 * Copyright (C) 2017 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 #define DEBUG false // STOPSHIP if true
18 #include "Log.h"
19
20 #include "StatsPuller.h"
21 #include "StatsPullerManager.h"
22 #include "guardrail/StatsdStats.h"
23 #include "puller_util.h"
24 #include "stats_log_util.h"
25
26 namespace android {
27 namespace os {
28 namespace statsd {
29
30 using std::lock_guard;
31
32 sp<UidMap> StatsPuller::mUidMap = nullptr;
SetUidMap(const sp<UidMap> & uidMap)33 void StatsPuller::SetUidMap(const sp<UidMap>& uidMap) { mUidMap = uidMap; }
34
StatsPuller(const int tagId,const int64_t coolDownNs,const int64_t pullTimeoutNs,const std::vector<int> additiveFields)35 StatsPuller::StatsPuller(const int tagId, const int64_t coolDownNs, const int64_t pullTimeoutNs,
36 const std::vector<int> additiveFields)
37 : mTagId(tagId),
38 mPullTimeoutNs(pullTimeoutNs),
39 mCoolDownNs(coolDownNs),
40 mAdditiveFields(additiveFields),
41 mLastPullTimeNs(0),
42 mLastEventTimeNs(0) {
43 }
44
Pull(const int64_t eventTimeNs,std::vector<std::shared_ptr<LogEvent>> * data)45 bool StatsPuller::Pull(const int64_t eventTimeNs, std::vector<std::shared_ptr<LogEvent>>* data) {
46 lock_guard<std::mutex> lock(mLock);
47 const int64_t elapsedTimeNs = getElapsedRealtimeNs();
48 const int64_t systemUptimeMillis = getSystemUptimeMillis();
49 StatsdStats::getInstance().notePull(mTagId);
50 const bool shouldUseCache =
51 (mLastEventTimeNs == eventTimeNs) || (elapsedTimeNs - mLastPullTimeNs < mCoolDownNs);
52 if (shouldUseCache) {
53 if (mHasGoodData) {
54 (*data) = mCachedData;
55 StatsdStats::getInstance().notePullFromCache(mTagId);
56
57 }
58 return mHasGoodData;
59 }
60 if (mLastPullTimeNs > 0) {
61 StatsdStats::getInstance().updateMinPullIntervalSec(
62 mTagId, (elapsedTimeNs - mLastPullTimeNs) / NS_PER_SEC);
63 }
64 mCachedData.clear();
65 mLastPullTimeNs = elapsedTimeNs;
66 mLastEventTimeNs = eventTimeNs;
67 mHasGoodData = PullInternal(&mCachedData);
68 if (!mHasGoodData) {
69 return mHasGoodData;
70 }
71 const int64_t pullElapsedDurationNs = getElapsedRealtimeNs() - elapsedTimeNs;
72 const int64_t pullSystemUptimeDurationMillis = getSystemUptimeMillis() - systemUptimeMillis;
73 StatsdStats::getInstance().notePullTime(mTagId, pullElapsedDurationNs);
74 const bool pullTimeOut = pullElapsedDurationNs > mPullTimeoutNs;
75 if (pullTimeOut) {
76 // Something went wrong. Discard the data.
77 mCachedData.clear();
78 mHasGoodData = false;
79 StatsdStats::getInstance().notePullTimeout(
80 mTagId, pullSystemUptimeDurationMillis, NanoToMillis(pullElapsedDurationNs));
81 ALOGW("Pull for atom %d exceeds timeout %lld nano seconds.", mTagId,
82 (long long)pullElapsedDurationNs);
83 return mHasGoodData;
84 }
85
86 if (mCachedData.size() > 0) {
87 mapAndMergeIsolatedUidsToHostUid(mCachedData, mUidMap, mTagId, mAdditiveFields);
88 }
89
90 if (mCachedData.empty()) {
91 VLOG("Data pulled is empty");
92 StatsdStats::getInstance().noteEmptyData(mTagId);
93 }
94
95 (*data) = mCachedData;
96 return mHasGoodData;
97 }
98
ForceClearCache()99 int StatsPuller::ForceClearCache() {
100 return clearCache();
101 }
102
clearCache()103 int StatsPuller::clearCache() {
104 lock_guard<std::mutex> lock(mLock);
105 return clearCacheLocked();
106 }
107
clearCacheLocked()108 int StatsPuller::clearCacheLocked() {
109 int ret = mCachedData.size();
110 mCachedData.clear();
111 mLastPullTimeNs = 0;
112 mLastEventTimeNs = 0;
113 return ret;
114 }
115
ClearCacheIfNecessary(int64_t timestampNs)116 int StatsPuller::ClearCacheIfNecessary(int64_t timestampNs) {
117 if (timestampNs - mLastPullTimeNs > mCoolDownNs) {
118 return clearCache();
119 } else {
120 return 0;
121 }
122 }
123
124 } // namespace statsd
125 } // namespace os
126 } // namespace android
127