blob: 8b6a5a17bc0eaa4c87dda753c95d182f1c86aba3 [file] [log] [blame]
/*
* 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 DEBUG false
#include "Log.h"
#include "StatsPullerManager.h"
#include <cutils/log.h>
#include <math.h>
#include <stdint.h>
#include <algorithm>
#include <iostream>
#include "../StatsService.h"
#include "../logd/LogEvent.h"
#include "../stats_log_util.h"
#include "../statscompanion_util.h"
#include "StatsCallbackPuller.h"
#include "TrainInfoPuller.h"
#include "statslog_statsd.h"
using std::shared_ptr;
using std::vector;
namespace android {
namespace os {
namespace statsd {
// Values smaller than this may require to update the alarm.
const int64_t NO_ALARM_UPDATE = INT64_MAX;
StatsPullerManager::StatsPullerManager()
: kAllPullAtomInfo({
// TrainInfo.
{{.atomTag = util::TRAIN_INFO}, new TrainInfoPuller()},
}),
mNextPullTimeNs(NO_ALARM_UPDATE) {
}
bool StatsPullerManager::Pull(int tagId, vector<shared_ptr<LogEvent>>* data) {
AutoMutex _l(mLock);
return PullLocked(tagId, data);
}
bool StatsPullerManager::PullLocked(int tagId, vector<shared_ptr<LogEvent>>* data) {
VLOG("Initiating pulling %d", tagId);
if (kAllPullAtomInfo.find({.atomTag = tagId}) != kAllPullAtomInfo.end()) {
bool ret = kAllPullAtomInfo.find({.atomTag = tagId})->second->Pull(data);
VLOG("pulled %d items", (int)data->size());
if (!ret) {
StatsdStats::getInstance().notePullFailed(tagId);
}
return ret;
} else {
ALOGW("StatsPullerManager: Unknown tagId %d", tagId);
return false; // Return early since we don't know what to pull.
}
}
bool StatsPullerManager::PullerForMatcherExists(int tagId) const {
// Pulled atoms might be registered after we parse the config, so just make sure the id is in
// an appropriate range.
return isVendorPulledAtom(tagId) || isPulledAtom(tagId);
}
void StatsPullerManager::updateAlarmLocked() {
if (mNextPullTimeNs == NO_ALARM_UPDATE) {
VLOG("No need to set alarms. Skipping");
return;
}
// TODO(b/151045771): do not hold a lock while making a binder call
if (mStatsCompanionService != nullptr) {
mStatsCompanionService->setPullingAlarm(mNextPullTimeNs / 1000000);
} else {
VLOG("StatsCompanionService not available. Alarm not set.");
}
return;
}
void StatsPullerManager::SetStatsCompanionService(
shared_ptr<IStatsCompanionService> statsCompanionService) {
AutoMutex _l(mLock);
shared_ptr<IStatsCompanionService> tmpForLock = mStatsCompanionService;
mStatsCompanionService = statsCompanionService;
for (const auto& pulledAtom : kAllPullAtomInfo) {
pulledAtom.second->SetStatsCompanionService(statsCompanionService);
}
if (mStatsCompanionService != nullptr) {
updateAlarmLocked();
}
}
void StatsPullerManager::RegisterReceiver(int tagId, wp<PullDataReceiver> receiver,
int64_t nextPullTimeNs, int64_t intervalNs) {
AutoMutex _l(mLock);
auto& receivers = mReceivers[tagId];
for (auto it = receivers.begin(); it != receivers.end(); it++) {
if (it->receiver == receiver) {
VLOG("Receiver already registered of %d", (int)receivers.size());
return;
}
}
ReceiverInfo receiverInfo;
receiverInfo.receiver = receiver;
// Round it to the nearest minutes. This is the limit of alarm manager.
// In practice, we should always have larger buckets.
int64_t roundedIntervalNs = intervalNs / NS_PER_SEC / 60 * NS_PER_SEC * 60;
// Scheduled pulling should be at least 1 min apart.
// This can be lower in cts tests, in which case we round it to 1 min.
if (roundedIntervalNs < 60 * (int64_t)NS_PER_SEC) {
roundedIntervalNs = 60 * (int64_t)NS_PER_SEC;
}
receiverInfo.intervalNs = roundedIntervalNs;
receiverInfo.nextPullTimeNs = nextPullTimeNs;
receivers.push_back(receiverInfo);
// There is only one alarm for all pulled events. So only set it to the smallest denom.
if (nextPullTimeNs < mNextPullTimeNs) {
VLOG("Updating next pull time %lld", (long long)mNextPullTimeNs);
mNextPullTimeNs = nextPullTimeNs;
updateAlarmLocked();
}
VLOG("Puller for tagId %d registered of %d", tagId, (int)receivers.size());
}
void StatsPullerManager::UnRegisterReceiver(int tagId, wp<PullDataReceiver> receiver) {
AutoMutex _l(mLock);
if (mReceivers.find(tagId) == mReceivers.end()) {
VLOG("Unknown pull code or no receivers: %d", tagId);
return;
}
auto& receivers = mReceivers.find(tagId)->second;
for (auto it = receivers.begin(); it != receivers.end(); it++) {
if (receiver == it->receiver) {
receivers.erase(it);
VLOG("Puller for tagId %d unregistered of %d", tagId, (int)receivers.size());
return;
}
}
}
void StatsPullerManager::OnAlarmFired(int64_t elapsedTimeNs) {
AutoMutex _l(mLock);
int64_t wallClockNs = getWallClockNs();
int64_t minNextPullTimeNs = NO_ALARM_UPDATE;
vector<pair<int, vector<ReceiverInfo*>>> needToPull =
vector<pair<int, vector<ReceiverInfo*>>>();
for (auto& pair : mReceivers) {
vector<ReceiverInfo*> receivers = vector<ReceiverInfo*>();
if (pair.second.size() != 0) {
for (ReceiverInfo& receiverInfo : pair.second) {
if (receiverInfo.nextPullTimeNs <= elapsedTimeNs) {
receivers.push_back(&receiverInfo);
} else {
if (receiverInfo.nextPullTimeNs < minNextPullTimeNs) {
minNextPullTimeNs = receiverInfo.nextPullTimeNs;
}
}
}
if (receivers.size() > 0) {
needToPull.push_back(make_pair(pair.first, receivers));
}
}
}
for (const auto& pullInfo : needToPull) {
vector<shared_ptr<LogEvent>> data;
bool pullSuccess = PullLocked(pullInfo.first, &data);
if (pullSuccess) {
StatsdStats::getInstance().notePullDelay(
pullInfo.first, getElapsedRealtimeNs() - elapsedTimeNs);
} else {
VLOG("pull failed at %lld, will try again later", (long long)elapsedTimeNs);
}
// Convention is to mark pull atom timestamp at request time.
// If we pull at t0, puller starts at t1, finishes at t2, and send back
// at t3, we mark t0 as its timestamp, which should correspond to its
// triggering event, such as condition change at t0.
// Here the triggering event is alarm fired from AlarmManager.
// In ValueMetricProducer and GaugeMetricProducer we do same thing
// when pull on condition change, etc.
for (auto& event : data) {
event->setElapsedTimestampNs(elapsedTimeNs);
event->setLogdWallClockTimestampNs(wallClockNs);
}
for (const auto& receiverInfo : pullInfo.second) {
sp<PullDataReceiver> receiverPtr = receiverInfo->receiver.promote();
if (receiverPtr != nullptr) {
receiverPtr->onDataPulled(data, pullSuccess, elapsedTimeNs);
// We may have just come out of a coma, compute next pull time.
int numBucketsAhead =
(elapsedTimeNs - receiverInfo->nextPullTimeNs) / receiverInfo->intervalNs;
receiverInfo->nextPullTimeNs += (numBucketsAhead + 1) * receiverInfo->intervalNs;
if (receiverInfo->nextPullTimeNs < minNextPullTimeNs) {
minNextPullTimeNs = receiverInfo->nextPullTimeNs;
}
} else {
VLOG("receiver already gone.");
}
}
}
VLOG("mNextPullTimeNs: %lld updated to %lld", (long long)mNextPullTimeNs,
(long long)minNextPullTimeNs);
mNextPullTimeNs = minNextPullTimeNs;
updateAlarmLocked();
}
int StatsPullerManager::ForceClearPullerCache() {
int totalCleared = 0;
for (const auto& pulledAtom : kAllPullAtomInfo) {
totalCleared += pulledAtom.second->ForceClearCache();
}
return totalCleared;
}
int StatsPullerManager::ClearPullerCacheIfNecessary(int64_t timestampNs) {
int totalCleared = 0;
for (const auto& pulledAtom : kAllPullAtomInfo) {
totalCleared += pulledAtom.second->ClearCacheIfNecessary(timestampNs);
}
return totalCleared;
}
void StatsPullerManager::RegisterPullAtomCallback(const int uid, const int32_t atomTag,
const int64_t coolDownNs, const int64_t timeoutNs,
const vector<int32_t>& additiveFields,
const shared_ptr<IPullAtomCallback>& callback) {
AutoMutex _l(mLock);
VLOG("RegisterPullerCallback: adding puller for tag %d", atomTag);
// TODO(b/146439412): linkToDeath with the callback so that we can remove it
// and delete the puller.
StatsdStats::getInstance().notePullerCallbackRegistrationChanged(atomTag, /*registered=*/true);
kAllPullAtomInfo[{.atomTag = atomTag}] =
new StatsCallbackPuller(atomTag, callback, coolDownNs, timeoutNs, additiveFields);
}
void StatsPullerManager::UnregisterPullAtomCallback(const int uid, const int32_t atomTag) {
AutoMutex _l(mLock);
StatsdStats::getInstance().notePullerCallbackRegistrationChanged(atomTag, /*registered=*/false);
kAllPullAtomInfo.erase({.atomTag = atomTag});
}
} // namespace statsd
} // namespace os
} // namespace android