cmds/statsd/src/metrics/ValueMetricProducer.cpp - platform/frameworks/base - Gitiles

 /*
  * 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 true  // STOPSHIP if true
 #include "Log.h"

 #include "ValueMetricProducer.h"

 #include <cutils/log.h>
 #include <limits.h>
 #include <stdlib.h>

 using android::util::FIELD_COUNT_REPEATED;
 using android::util::FIELD_TYPE_BOOL;
 using android::util::FIELD_TYPE_FLOAT;
 using android::util::FIELD_TYPE_INT32;
 using android::util::FIELD_TYPE_INT64;
 using android::util::FIELD_TYPE_MESSAGE;
 using android::util::ProtoOutputStream;
 using std::list;
 using std::make_shared;
 using std::map;
 using std::shared_ptr;
 using std::unique_ptr;
 using std::unordered_map;

 namespace android {
 namespace os {
 namespace statsd {

 // for StatsLogReport
 const int FIELD_ID_METRIC_ID = 1;
 const int FIELD_ID_START_REPORT_NANOS = 2;
 const int FIELD_ID_END_REPORT_NANOS = 3;
 const int FIELD_ID_VALUE_METRICS = 7;
 // for ValueMetricDataWrapper
 const int FIELD_ID_DATA = 1;
 // for ValueMetricData
 const int FIELD_ID_DIMENSION = 1;
 const int FIELD_ID_BUCKET_INFO = 2;
 // for KeyValuePair
 const int FIELD_ID_KEY = 1;
 const int FIELD_ID_VALUE_STR = 2;
 const int FIELD_ID_VALUE_INT = 3;
 const int FIELD_ID_VALUE_BOOL = 4;
 const int FIELD_ID_VALUE_FLOAT = 5;
 // for ValueBucketInfo
 const int FIELD_ID_START_BUCKET_NANOS = 1;
 const int FIELD_ID_END_BUCKET_NANOS = 2;
 const int FIELD_ID_VALUE = 3;

 // ValueMetric has a minimum bucket size of 10min so that we don't pull too frequently
 ValueMetricProducer::ValueMetricProducer(const ValueMetric& metric, const int conditionIndex,
                                          const sp<ConditionWizard>& wizard, const int pullTagId,
                                          const uint64_t startTimeNs)
     : MetricProducer(startTimeNs, conditionIndex, wizard), mMetric(metric), mPullTagId(pullTagId) {
     // TODO: valuemetric for pushed events may need unlimited bucket length
     mBucketSizeNs = mMetric.bucket().bucket_size_millis() * 1000 * 1000;

     mDimension.insert(mDimension.begin(), metric.dimension().begin(), metric.dimension().end());

     if (metric.links().size() > 0) {
         mConditionLinks.insert(mConditionLinks.begin(), metric.links().begin(),
                                metric.links().end());
         mConditionSliced = true;
     }

     if (!metric.has_condition() && mPullTagId != -1) {
         mStatsPullerManager.RegisterReceiver(mPullTagId, this,
                                              metric.bucket().bucket_size_millis());
     }

     startNewProtoOutputStream(mStartTimeNs);

     VLOG("value metric %lld created. bucket size %lld start_time: %lld", metric.metric_id(),
          (long long)mBucketSizeNs, (long long)mStartTimeNs);
 }

 ValueMetricProducer::~ValueMetricProducer() {
     VLOG("~ValueMetricProducer() called");
 }

 void ValueMetricProducer::startNewProtoOutputStream(long long startTime) {
     mProto = std::make_unique<ProtoOutputStream>();
     mProto->write(FIELD_TYPE_INT32 | FIELD_ID_METRIC_ID, mMetric.metric_id());
     mProto->write(FIELD_TYPE_INT64 | FIELD_ID_START_REPORT_NANOS, startTime);
     mProtoToken = mProto->start(FIELD_TYPE_MESSAGE | FIELD_ID_VALUE_METRICS);
 }

 void ValueMetricProducer::finish() {
     // TODO: write the StatsLogReport to dropbox using
     // DropboxWriter.
 }

 void ValueMetricProducer::onSlicedConditionMayChange(const uint64_t eventTime) {
     VLOG("Metric %lld onSlicedConditionMayChange", mMetric.metric_id());
 }

 std::unique_ptr<std::vector<uint8_t>> ValueMetricProducer::onDumpReport() {
     VLOG("metric %lld dump report now...", mMetric.metric_id());

     for (const auto& pair : mPastBuckets) {
         const HashableDimensionKey& hashableKey = pair.first;
         VLOG("  dimension key %s", hashableKey.c_str());
         auto it = mDimensionKeyMap.find(hashableKey);
         if (it == mDimensionKeyMap.end()) {
             ALOGE("Dimension key %s not found?!?! skip...", hashableKey.c_str());
             continue;
         }
         long long wrapperToken =
                 mProto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED | FIELD_ID_DATA);

         // First fill dimension (KeyValuePairs).
         for (const auto& kv : it->second) {
             long long dimensionToken =
                     mProto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED | FIELD_ID_DIMENSION);
             mProto->write(FIELD_TYPE_INT32 | FIELD_ID_KEY, kv.key());
             if (kv.has_value_str()) {
                 mProto->write(FIELD_TYPE_INT32 | FIELD_ID_VALUE_STR, kv.value_str());
             } else if (kv.has_value_int()) {
                 mProto->write(FIELD_TYPE_INT64 | FIELD_ID_VALUE_INT, kv.value_int());
             } else if (kv.has_value_bool()) {
                 mProto->write(FIELD_TYPE_BOOL | FIELD_ID_VALUE_BOOL, kv.value_bool());
             } else if (kv.has_value_float()) {
                 mProto->write(FIELD_TYPE_FLOAT | FIELD_ID_VALUE_FLOAT, kv.value_float());
             }
             mProto->end(dimensionToken);
         }

         // Then fill bucket_info (ValueBucketInfo).
         for (const auto& bucket : pair.second) {
             long long bucketInfoToken =
                     mProto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED | FIELD_ID_BUCKET_INFO);
             mProto->write(FIELD_TYPE_INT64 | FIELD_ID_START_BUCKET_NANOS,
                           (long long)bucket.mBucketStartNs);
             mProto->write(FIELD_TYPE_INT64 | FIELD_ID_END_BUCKET_NANOS,
                           (long long)bucket.mBucketEndNs);
             mProto->write(FIELD_TYPE_INT64 | FIELD_ID_VALUE, (long long)bucket.mValue);
             mProto->end(bucketInfoToken);
             VLOG("\t bucket [%lld - %lld] count: %lld", (long long)bucket.mBucketStartNs,
                  (long long)bucket.mBucketEndNs, (long long)bucket.mValue);
         }
         mProto->end(wrapperToken);
     }
     mProto->end(mProtoToken);
     mProto->write(FIELD_TYPE_INT64 | FIELD_ID_END_REPORT_NANOS,
                   (long long)mCurrentBucketStartTimeNs);

     VLOG("metric %lld dump report now...", mMetric.metric_id());
     std::unique_ptr<std::vector<uint8_t>> buffer = serializeProto();

     startNewProtoOutputStream(time(nullptr) * NS_PER_SEC);
     mPastBuckets.clear();
     mByteSize = 0;

     return buffer;

     // TODO: Clear mDimensionKeyMap once the report is dumped.
 }

 void ValueMetricProducer::onConditionChanged(const bool condition, const uint64_t eventTime) {
     AutoMutex _l(mLock);
     mCondition = condition;

     if (mPullTagId != -1) {
         if (mCondition == true) {
             mStatsPullerManager.RegisterReceiver(mPullTagId, this,
                                                  mMetric.bucket().bucket_size_millis());
         } else if (mCondition == ConditionState::kFalse) {
             mStatsPullerManager.UnRegisterReceiver(mPullTagId, this);
         }

         vector<shared_ptr<LogEvent>> allData;
         if (mStatsPullerManager.Pull(mPullTagId, &allData)) {
             if (allData.size() == 0) {
                 return;
             }
             for (const auto& data : allData) {
                 onMatchedLogEvent(0, *data, false);
             }
             flush_if_needed(eventTime);
         }
         return;
     }
 }

 void ValueMetricProducer::onDataPulled(const std::vector<std::shared_ptr<LogEvent>>& allData) {
     AutoMutex _l(mLock);
     if (mCondition == ConditionState::kTrue || !mMetric.has_condition()) {
         if (allData.size() == 0) {
             return;
         }
         uint64_t eventTime = allData.at(0)->GetTimestampNs();
         for (const auto& data : allData) {
             onMatchedLogEvent(0, *data, true);
         }
         flush_if_needed(eventTime);
     }
 }

 void ValueMetricProducer::onMatchedLogEventInternal(
         const size_t matcherIndex, const HashableDimensionKey& eventKey,
         const map<string, HashableDimensionKey>& conditionKey, bool condition,
         const LogEvent& event, bool scheduledPull) {
     uint64_t eventTimeNs = event.GetTimestampNs();
     if (eventTimeNs < mCurrentBucketStartTimeNs) {
         VLOG("Skip event due to late arrival: %lld vs %lld", (long long)eventTimeNs,
              (long long)mCurrentBucketStartTimeNs);
         return;
     }

     Interval& interval = mCurrentSlicedBucket[eventKey];

     long value = get_value(event);

     if (scheduledPull) {
         if (interval.raw.size() > 0) {
             interval.raw.back().second = value;
         } else {
             interval.raw.push_back(std::make_pair(value, value));
         }
         mNextSlicedBucket[eventKey].raw[0].first = value;
     } else {
         if (mCondition == ConditionState::kTrue) {
             interval.raw.push_back(std::make_pair(value, 0));
         } else {
             if (interval.raw.size() != 0) {
                 interval.raw.back().second = value;
             }
         }
     }
     if (mPullTagId == -1) {
         flush_if_needed(eventTimeNs);
     }
 }

 long ValueMetricProducer::get_value(const LogEvent& event) {
     status_t err = NO_ERROR;
     long val = event.GetLong(mMetric.value_field(), &err);
     if (err == NO_ERROR) {
         return val;
     } else {
         VLOG("Can't find value in message.");
         return 0;
     }
 }

 void ValueMetricProducer::flush_if_needed(const uint64_t eventTimeNs) {
     if (mCurrentBucketStartTimeNs + mBucketSizeNs > eventTimeNs) {
         VLOG("eventTime is %lld, less than next bucket start time %lld", (long long)eventTimeNs,
              (long long)(mCurrentBucketStartTimeNs + mBucketSizeNs));
         return;
     }

     VLOG("finalizing bucket for %ld, dumping %d slices", (long)mCurrentBucketStartTimeNs,
          (int)mCurrentSlicedBucket.size());
     ValueBucket info;
     info.mBucketStartNs = mCurrentBucketStartTimeNs;
     info.mBucketEndNs = mCurrentBucketStartTimeNs + mBucketSizeNs;

     for (const auto& slice : mCurrentSlicedBucket) {
         long value = 0;
         for (const auto& pair : slice.second.raw) {
             value += pair.second - pair.first;
         }
         info.mValue = value;
         VLOG(" %s, %ld", slice.first.c_str(), value);
         // it will auto create new vector of ValuebucketInfo if the key is not found.
         auto& bucketList = mPastBuckets[slice.first];
         bucketList.push_back(info);
         mByteSize += sizeof(info);
     }

     // Reset counters
     mCurrentSlicedBucket.swap(mNextSlicedBucket);
     mNextSlicedBucket.clear();
     int64_t numBucketsForward = (eventTimeNs - mCurrentBucketStartTimeNs) / mBucketSizeNs;
     if (numBucketsForward > 1) {
         VLOG("Skipping forward %lld buckets", (long long)numBucketsForward);
     }
     mCurrentBucketStartTimeNs = mCurrentBucketStartTimeNs + numBucketsForward * mBucketSizeNs;
     VLOG("metric %lld: new bucket start time: %lld", mMetric.metric_id(),
          (long long)mCurrentBucketStartTimeNs);
 }

 size_t ValueMetricProducer::byteSize() {
     return mByteSize;
 }

 }  // namespace statsd
 }  // namespace os
 }  // namespace android
	/*
	* 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 true // STOPSHIP if true
	#include "Log.h"

	#include "ValueMetricProducer.h"

	#include <cutils/log.h>
	#include <limits.h>
	#include <stdlib.h>

	using android::util::FIELD_COUNT_REPEATED;
	using android::util::FIELD_TYPE_BOOL;
	using android::util::FIELD_TYPE_FLOAT;
	using android::util::FIELD_TYPE_INT32;
	using android::util::FIELD_TYPE_INT64;
	using android::util::FIELD_TYPE_MESSAGE;
	using android::util::ProtoOutputStream;
	using std::list;
	using std::make_shared;
	using std::map;
	using std::shared_ptr;
	using std::unique_ptr;
	using std::unordered_map;

	namespace android {
	namespace os {
	namespace statsd {

	// for StatsLogReport
	const int FIELD_ID_METRIC_ID = 1;
	const int FIELD_ID_START_REPORT_NANOS = 2;
	const int FIELD_ID_END_REPORT_NANOS = 3;
	const int FIELD_ID_VALUE_METRICS = 7;
	// for ValueMetricDataWrapper
	const int FIELD_ID_DATA = 1;
	// for ValueMetricData
	const int FIELD_ID_DIMENSION = 1;
	const int FIELD_ID_BUCKET_INFO = 2;
	// for KeyValuePair
	const int FIELD_ID_KEY = 1;
	const int FIELD_ID_VALUE_STR = 2;
	const int FIELD_ID_VALUE_INT = 3;
	const int FIELD_ID_VALUE_BOOL = 4;
	const int FIELD_ID_VALUE_FLOAT = 5;
	// for ValueBucketInfo
	const int FIELD_ID_START_BUCKET_NANOS = 1;
	const int FIELD_ID_END_BUCKET_NANOS = 2;
	const int FIELD_ID_VALUE = 3;

	// ValueMetric has a minimum bucket size of 10min so that we don't pull too frequently
	ValueMetricProducer::ValueMetricProducer(const ValueMetric& metric, const int conditionIndex,
	const sp<ConditionWizard>& wizard, const int pullTagId,
	const uint64_t startTimeNs)
	: MetricProducer(startTimeNs, conditionIndex, wizard), mMetric(metric), mPullTagId(pullTagId) {
	// TODO: valuemetric for pushed events may need unlimited bucket length
	mBucketSizeNs = mMetric.bucket().bucket_size_millis() * 1000 * 1000;

	mDimension.insert(mDimension.begin(), metric.dimension().begin(), metric.dimension().end());

	if (metric.links().size() > 0) {
	mConditionLinks.insert(mConditionLinks.begin(), metric.links().begin(),
	metric.links().end());
	mConditionSliced = true;
	}

	if (!metric.has_condition() && mPullTagId != -1) {
	mStatsPullerManager.RegisterReceiver(mPullTagId, this,
	metric.bucket().bucket_size_millis());
	}

	startNewProtoOutputStream(mStartTimeNs);

	VLOG("value metric %lld created. bucket size %lld start_time: %lld", metric.metric_id(),
	(long long)mBucketSizeNs, (long long)mStartTimeNs);
	}

	ValueMetricProducer::~ValueMetricProducer() {
	VLOG("~ValueMetricProducer() called");
	}

	void ValueMetricProducer::startNewProtoOutputStream(long long startTime) {
	mProto = std::make_unique<ProtoOutputStream>();
	mProto->write(FIELD_TYPE_INT32 \| FIELD_ID_METRIC_ID, mMetric.metric_id());
	mProto->write(FIELD_TYPE_INT64 \| FIELD_ID_START_REPORT_NANOS, startTime);
	mProtoToken = mProto->start(FIELD_TYPE_MESSAGE \| FIELD_ID_VALUE_METRICS);
	}

	void ValueMetricProducer::finish() {
	// TODO: write the StatsLogReport to dropbox using
	// DropboxWriter.
	}

	void ValueMetricProducer::onSlicedConditionMayChange(const uint64_t eventTime) {
	VLOG("Metric %lld onSlicedConditionMayChange", mMetric.metric_id());
	}

	std::unique_ptr<std::vector<uint8_t>> ValueMetricProducer::onDumpReport() {
	VLOG("metric %lld dump report now...", mMetric.metric_id());

	for (const auto& pair : mPastBuckets) {
	const HashableDimensionKey& hashableKey = pair.first;
	VLOG(" dimension key %s", hashableKey.c_str());
	auto it = mDimensionKeyMap.find(hashableKey);
	if (it == mDimensionKeyMap.end()) {
	ALOGE("Dimension key %s not found?!?! skip...", hashableKey.c_str());
	continue;
	}
	long long wrapperToken =
	mProto->start(FIELD_TYPE_MESSAGE \| FIELD_COUNT_REPEATED \| FIELD_ID_DATA);

	// First fill dimension (KeyValuePairs).
	for (const auto& kv : it->second) {
	long long dimensionToken =
	mProto->start(FIELD_TYPE_MESSAGE \| FIELD_COUNT_REPEATED \| FIELD_ID_DIMENSION);
	mProto->write(FIELD_TYPE_INT32 \| FIELD_ID_KEY, kv.key());
	if (kv.has_value_str()) {
	mProto->write(FIELD_TYPE_INT32 \| FIELD_ID_VALUE_STR, kv.value_str());
	} else if (kv.has_value_int()) {
	mProto->write(FIELD_TYPE_INT64 \| FIELD_ID_VALUE_INT, kv.value_int());
	} else if (kv.has_value_bool()) {
	mProto->write(FIELD_TYPE_BOOL \| FIELD_ID_VALUE_BOOL, kv.value_bool());
	} else if (kv.has_value_float()) {
	mProto->write(FIELD_TYPE_FLOAT \| FIELD_ID_VALUE_FLOAT, kv.value_float());
	}
	mProto->end(dimensionToken);
	}

	// Then fill bucket_info (ValueBucketInfo).
	for (const auto& bucket : pair.second) {
	long long bucketInfoToken =
	mProto->start(FIELD_TYPE_MESSAGE \| FIELD_COUNT_REPEATED \| FIELD_ID_BUCKET_INFO);
	mProto->write(FIELD_TYPE_INT64 \| FIELD_ID_START_BUCKET_NANOS,
	(long long)bucket.mBucketStartNs);
	mProto->write(FIELD_TYPE_INT64 \| FIELD_ID_END_BUCKET_NANOS,
	(long long)bucket.mBucketEndNs);
	mProto->write(FIELD_TYPE_INT64 \| FIELD_ID_VALUE, (long long)bucket.mValue);
	mProto->end(bucketInfoToken);
	VLOG("\t bucket [%lld - %lld] count: %lld", (long long)bucket.mBucketStartNs,
	(long long)bucket.mBucketEndNs, (long long)bucket.mValue);
	}
	mProto->end(wrapperToken);
	}
	mProto->end(mProtoToken);
	mProto->write(FIELD_TYPE_INT64 \| FIELD_ID_END_REPORT_NANOS,
	(long long)mCurrentBucketStartTimeNs);

	VLOG("metric %lld dump report now...", mMetric.metric_id());
	std::unique_ptr<std::vector<uint8_t>> buffer = serializeProto();

	startNewProtoOutputStream(time(nullptr) * NS_PER_SEC);
	mPastBuckets.clear();
	mByteSize = 0;

	return buffer;

	// TODO: Clear mDimensionKeyMap once the report is dumped.
	}

	void ValueMetricProducer::onConditionChanged(const bool condition, const uint64_t eventTime) {
	AutoMutex _l(mLock);
	mCondition = condition;

	if (mPullTagId != -1) {
	if (mCondition == true) {
	mStatsPullerManager.RegisterReceiver(mPullTagId, this,
	mMetric.bucket().bucket_size_millis());
	} else if (mCondition == ConditionState::kFalse) {
	mStatsPullerManager.UnRegisterReceiver(mPullTagId, this);
	}

	vector<shared_ptr<LogEvent>> allData;
	if (mStatsPullerManager.Pull(mPullTagId, &allData)) {
	if (allData.size() == 0) {
	return;
	}
	for (const auto& data : allData) {
	onMatchedLogEvent(0, *data, false);
	}
	flush_if_needed(eventTime);
	}
	return;
	}
	}

	void ValueMetricProducer::onDataPulled(const std::vector<std::shared_ptr<LogEvent>>& allData) {
	AutoMutex _l(mLock);
	if (mCondition == ConditionState::kTrue \|\| !mMetric.has_condition()) {
	if (allData.size() == 0) {
	return;
	}
	uint64_t eventTime = allData.at(0)->GetTimestampNs();
	for (const auto& data : allData) {
	onMatchedLogEvent(0, *data, true);
	}
	flush_if_needed(eventTime);
	}
	}

	void ValueMetricProducer::onMatchedLogEventInternal(
	const size_t matcherIndex, const HashableDimensionKey& eventKey,
	const map<string, HashableDimensionKey>& conditionKey, bool condition,
	const LogEvent& event, bool scheduledPull) {
	uint64_t eventTimeNs = event.GetTimestampNs();
	if (eventTimeNs < mCurrentBucketStartTimeNs) {
	VLOG("Skip event due to late arrival: %lld vs %lld", (long long)eventTimeNs,
	(long long)mCurrentBucketStartTimeNs);
	return;
	}

	Interval& interval = mCurrentSlicedBucket[eventKey];

	long value = get_value(event);

	if (scheduledPull) {
	if (interval.raw.size() > 0) {
	interval.raw.back().second = value;
	} else {
	interval.raw.push_back(std::make_pair(value, value));
	}
	mNextSlicedBucket[eventKey].raw[0].first = value;
	} else {
	if (mCondition == ConditionState::kTrue) {
	interval.raw.push_back(std::make_pair(value, 0));
	} else {
	if (interval.raw.size() != 0) {
	interval.raw.back().second = value;
	}
	}
	}
	if (mPullTagId == -1) {
	flush_if_needed(eventTimeNs);
	}
	}

	long ValueMetricProducer::get_value(const LogEvent& event) {
	status_t err = NO_ERROR;
	long val = event.GetLong(mMetric.value_field(), &err);
	if (err == NO_ERROR) {
	return val;
	} else {
	VLOG("Can't find value in message.");
	return 0;
	}
	}

	void ValueMetricProducer::flush_if_needed(const uint64_t eventTimeNs) {
	if (mCurrentBucketStartTimeNs + mBucketSizeNs > eventTimeNs) {
	VLOG("eventTime is %lld, less than next bucket start time %lld", (long long)eventTimeNs,
	(long long)(mCurrentBucketStartTimeNs + mBucketSizeNs));
	return;
	}

	VLOG("finalizing bucket for %ld, dumping %d slices", (long)mCurrentBucketStartTimeNs,
	(int)mCurrentSlicedBucket.size());
	ValueBucket info;
	info.mBucketStartNs = mCurrentBucketStartTimeNs;
	info.mBucketEndNs = mCurrentBucketStartTimeNs + mBucketSizeNs;

	for (const auto& slice : mCurrentSlicedBucket) {
	long value = 0;
	for (const auto& pair : slice.second.raw) {
	value += pair.second - pair.first;
	}
	info.mValue = value;
	VLOG(" %s, %ld", slice.first.c_str(), value);
	// it will auto create new vector of ValuebucketInfo if the key is not found.
	auto& bucketList = mPastBuckets[slice.first];
	bucketList.push_back(info);
	mByteSize += sizeof(info);
	}

	// Reset counters
	mCurrentSlicedBucket.swap(mNextSlicedBucket);
	mNextSlicedBucket.clear();
	int64_t numBucketsForward = (eventTimeNs - mCurrentBucketStartTimeNs) / mBucketSizeNs;
	if (numBucketsForward > 1) {
	VLOG("Skipping forward %lld buckets", (long long)numBucketsForward);
	}
	mCurrentBucketStartTimeNs = mCurrentBucketStartTimeNs + numBucketsForward * mBucketSizeNs;
	VLOG("metric %lld: new bucket start time: %lld", mMetric.metric_id(),
	(long long)mCurrentBucketStartTimeNs);
	}

	size_t ValueMetricProducer::byteSize() {
	return mByteSize;
	}

	} // namespace statsd
	} // namespace os
	} // namespace android