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/*
* Copyright (C) 2017 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.
*/
#define STATSD_DEBUG false // STOPSHIP if true
#include "Log.h"
#include "StatsPuller.h"
#include "StatsPullerManager.h"
#include "guardrail/StatsdStats.h"
#include "puller_util.h"
#include "stats_log_util.h"
namespace android {
namespace os {
namespace statsd {
using std::lock_guard;
sp<UidMap> StatsPuller::mUidMap = nullptr;
void StatsPuller::SetUidMap(const sp<UidMap>& uidMap) { mUidMap = uidMap; }
StatsPuller::StatsPuller(const int tagId, const int64_t coolDownNs, const int64_t pullTimeoutNs,
const std::vector<int> additiveFields)
: mTagId(tagId),
mPullTimeoutNs(pullTimeoutNs),
mCoolDownNs(coolDownNs),
mAdditiveFields(additiveFields),
mLastPullTimeNs(0),
mLastEventTimeNs(0) {
}
PullErrorCode StatsPuller::Pull(const int64_t eventTimeNs,
std::vector<std::shared_ptr<LogEvent>>* data) {
lock_guard<std::mutex> lock(mLock);
const int64_t elapsedTimeNs = getElapsedRealtimeNs();
const int64_t systemUptimeMillis = getSystemUptimeMillis();
StatsdStats::getInstance().notePull(mTagId);
const bool shouldUseCache =
(mLastEventTimeNs == eventTimeNs) || (elapsedTimeNs - mLastPullTimeNs < mCoolDownNs);
if (shouldUseCache) {
if (mHasGoodData) {
(*data) = mCachedData;
StatsdStats::getInstance().notePullFromCache(mTagId);
}
return mHasGoodData ? PULL_SUCCESS : PULL_FAIL;
}
if (mLastPullTimeNs > 0) {
StatsdStats::getInstance().updateMinPullIntervalSec(
mTagId, (elapsedTimeNs - mLastPullTimeNs) / NS_PER_SEC);
}
mCachedData.clear();
mLastPullTimeNs = elapsedTimeNs;
mLastEventTimeNs = eventTimeNs;
PullErrorCode status = PullInternal(&mCachedData);
mHasGoodData = (status == PULL_SUCCESS);
if (!mHasGoodData) {
return status;
}
const int64_t pullElapsedDurationNs = getElapsedRealtimeNs() - elapsedTimeNs;
const int64_t pullSystemUptimeDurationMillis = getSystemUptimeMillis() - systemUptimeMillis;
StatsdStats::getInstance().notePullTime(mTagId, pullElapsedDurationNs);
const bool pullTimeOut = pullElapsedDurationNs > mPullTimeoutNs;
if (pullTimeOut) {
// Something went wrong. Discard the data.
mCachedData.clear();
mHasGoodData = false;
StatsdStats::getInstance().notePullTimeout(
mTagId, pullSystemUptimeDurationMillis, NanoToMillis(pullElapsedDurationNs));
ALOGW("Pull for atom %d exceeds timeout %lld nano seconds.", mTagId,
(long long)pullElapsedDurationNs);
return PULL_FAIL;
}
if (mCachedData.size() > 0) {
mapAndMergeIsolatedUidsToHostUid(mCachedData, mUidMap, mTagId, mAdditiveFields);
}
if (mCachedData.empty()) {
VLOG("Data pulled is empty");
StatsdStats::getInstance().noteEmptyData(mTagId);
}
(*data) = mCachedData;
return PULL_SUCCESS;
}
int StatsPuller::ForceClearCache() {
return clearCache();
}
int StatsPuller::clearCache() {
lock_guard<std::mutex> lock(mLock);
return clearCacheLocked();
}
int StatsPuller::clearCacheLocked() {
int ret = mCachedData.size();
mCachedData.clear();
mLastPullTimeNs = 0;
mLastEventTimeNs = 0;
return ret;
}
int StatsPuller::ClearCacheIfNecessary(int64_t timestampNs) {
if (timestampNs - mLastPullTimeNs > mCoolDownNs) {
return clearCache();
} else {
return 0;
}
}
} // namespace statsd
} // namespace os
} // namespace android
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