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/*
* Copyright (C) 2021 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 // STOPSHIP if true
#include "Log.h"
#include "KllMetricProducer.h"
#include <limits.h>
#include <stdlib.h>
#include "guardrail/StatsdStats.h"
#include "metrics/parsing_utils/metrics_manager_util.h"
#include "stats_log_util.h"
using android::util::FIELD_COUNT_REPEATED;
using android::util::FIELD_TYPE_BYTES;
using android::util::FIELD_TYPE_INT32;
using android::util::FIELD_TYPE_MESSAGE;
using android::util::ProtoOutputStream;
using std::map;
using std::nullopt;
using std::optional;
using std::shared_ptr;
using std::string;
using std::unordered_map;
using zetasketch::android::AggregatorStateProto;
namespace android {
namespace os {
namespace statsd {
// for StatsLogReport
const int FIELD_ID_KLL_METRICS = 16;
// for KllBucketInfo
const int FIELD_ID_SKETCH_INDEX = 1;
const int FIELD_ID_KLL_SKETCH = 2;
const int FIELD_ID_SKETCHES = 3;
const int FIELD_ID_BUCKET_NUM = 4;
const int FIELD_ID_START_BUCKET_ELAPSED_MILLIS = 5;
const int FIELD_ID_END_BUCKET_ELAPSED_MILLIS = 6;
const int FIELD_ID_CONDITION_TRUE_NS = 7;
KllMetricProducer::KllMetricProducer(const ConfigKey& key, const KllMetric& metric,
const uint64_t protoHash, const PullOptions& pullOptions,
const BucketOptions& bucketOptions,
const WhatOptions& whatOptions,
const ConditionOptions& conditionOptions,
const StateOptions& stateOptions,
const ActivationOptions& activationOptions,
const GuardrailOptions& guardrailOptions)
: ValueMetricProducer(metric.id(), key, protoHash, pullOptions, bucketOptions, whatOptions,
conditionOptions, stateOptions, activationOptions, guardrailOptions) {
}
KllMetricProducer::DumpProtoFields KllMetricProducer::getDumpProtoFields() const {
return {FIELD_ID_KLL_METRICS,
FIELD_ID_BUCKET_NUM,
FIELD_ID_START_BUCKET_ELAPSED_MILLIS,
FIELD_ID_END_BUCKET_ELAPSED_MILLIS,
FIELD_ID_CONDITION_TRUE_NS,
/*conditionCorrectionNsFieldId=*/nullopt};
}
void KllMetricProducer::writePastBucketAggregateToProto(
const int aggIndex, const unique_ptr<KllQuantile>& kll,
ProtoOutputStream* const protoOutput) const {
uint64_t sketchesToken =
protoOutput->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED | FIELD_ID_SKETCHES);
protoOutput->write(FIELD_TYPE_INT32 | FIELD_ID_SKETCH_INDEX, aggIndex);
// TODO(b/186737273): Serialize directly to ProtoOutputStream
const AggregatorStateProto& aggProto = kll->SerializeToProto();
const size_t numBytes = aggProto.ByteSizeLong();
const unique_ptr<char[]> buffer(new char[numBytes]);
aggProto.SerializeToArray(&buffer[0], numBytes);
protoOutput->write(FIELD_TYPE_BYTES | FIELD_ID_KLL_SKETCH, &buffer[0], numBytes);
VLOG("\t\t sketch %d: %zu bytes", aggIndex, numBytes);
protoOutput->end(sketchesToken);
}
optional<int64_t> getInt64ValueFromEvent(const LogEvent& event, const Matcher& matcher) {
for (const FieldValue& value : event.getValues()) {
if (value.mField.matches(matcher)) {
switch (value.mValue.type) {
case INT:
return {value.mValue.int_value};
case LONG:
return {value.mValue.long_value};
default:
return nullopt;
}
}
}
return nullopt;
}
void KllMetricProducer::aggregateFields(const int64_t eventTimeNs,
const MetricDimensionKey& eventKey, const LogEvent& event,
vector<Interval>& intervals, Empty& empty) {
for (size_t i = 0; i < mFieldMatchers.size(); i++) {
const Matcher& matcher = mFieldMatchers[i];
Interval& interval = intervals[i];
interval.aggIndex = i;
const optional<int64_t> valueOpt = getInt64ValueFromEvent(event, matcher);
if (!valueOpt) {
VLOG("Failed to get value %zu from event %s", i, event.ToString().c_str());
StatsdStats::getInstance().noteBadValueType(mMetricId);
return;
}
// interval.aggregate can be nullptr from cases:
// 1. Initialization from default construction of Interval struct.
// 2. Ownership of the unique_ptr<KllQuantile> at interval.aggregate being transferred to
// PastBucket after flushing.
if (!interval.aggregate) {
interval.aggregate = KllQuantile::Create();
}
interval.seenNewData = true;
interval.aggregate->Add(valueOpt.value());
interval.sampleSize += 1;
}
}
PastBucket<unique_ptr<KllQuantile>> KllMetricProducer::buildPartialBucket(
int64_t bucketEndTimeNs, vector<Interval>& intervals) {
PastBucket<unique_ptr<KllQuantile>> bucket;
bucket.mBucketStartNs = mCurrentBucketStartTimeNs;
bucket.mBucketEndNs = bucketEndTimeNs;
for (Interval& interval : intervals) {
if (interval.hasValue()) {
bucket.aggIndex.push_back(interval.aggIndex);
// Transfer ownership of unique_ptr<KllQuantile> from interval.aggregate to
// bucket.aggregates vector. interval.aggregate is guaranteed to be nullptr after this.
bucket.aggregates.push_back(std::move(interval.aggregate));
}
}
return bucket;
}
size_t KllMetricProducer::byteSizeLocked() const {
size_t totalSize = 0;
for (const auto& [_, buckets] : mPastBuckets) {
totalSize += buckets.size() * kBucketSize;
for (const auto& bucket : buckets) {
static const size_t kIntSize = sizeof(int);
totalSize += bucket.aggIndex.size() * kIntSize;
if (!bucket.aggregates.empty()) {
static const size_t kInt64Size = sizeof(int64_t);
// Assume sketch size is the same for all aggregations in a bucket.
totalSize += bucket.aggregates.size() * kInt64Size *
bucket.aggregates[0]->num_stored_values();
}
}
}
return totalSize;
}
} // namespace statsd
} // namespace os
} // namespace android
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