Statsd CPU optimization.
The key change is to revamp how we parse/store/match a log event, especially how we match repeated
field and attribution nodes, and how we construct dimensions and compare them.
+ We use a integer to encode the field of a log element. And also encode the FieldMatcher into an
integer and a bit mask. The log matching becomes 2 integer operations.
+ Dimension is stored as encoded field and value pair. Checking if 2 dimensions are equal is then
becoming checking if the underlying integers are equal. The integers are stored contiguously
in memory, so it's much faster than previous tree structure.
Start review from FieldValue.h
Test: statsd_test + new unit tests
Bug: 72659059
Change-Id: Iec8daeacdd3f39ab297c10ab9cd7b710a9c42e86
diff --git a/cmds/statsd/src/metrics/CountMetricProducer.cpp b/cmds/statsd/src/metrics/CountMetricProducer.cpp
index 5a042b6..bd2674b 100644
--- a/cmds/statsd/src/metrics/CountMetricProducer.cpp
+++ b/cmds/statsd/src/metrics/CountMetricProducer.cpp
@@ -21,7 +21,6 @@
#include "guardrail/StatsdStats.h"
#include "stats_util.h"
#include "stats_log_util.h"
-#include "dimension.h"
#include <limits.h>
#include <stdlib.h>
@@ -69,16 +68,26 @@
mBucketSizeNs = LLONG_MAX;
}
- // TODO: use UidMap if uid->pkg_name is required
- mDimensionsInWhat = metric.dimensions_in_what();
- mDimensionsInCondition = metric.dimensions_in_condition();
+ if (metric.has_dimensions_in_what()) {
+ translateFieldMatcher(metric.dimensions_in_what(), &mDimensionsInWhat);
+ }
+
+ if (metric.has_dimensions_in_condition()) {
+ translateFieldMatcher(metric.dimensions_in_condition(), &mDimensionsInCondition);
+ }
if (metric.links().size() > 0) {
- mConditionLinks.insert(mConditionLinks.begin(), metric.links().begin(),
- metric.links().end());
+ for (const auto& link : metric.links()) {
+ Metric2Condition mc;
+ mc.conditionId = link.condition();
+ translateFieldMatcher(link.fields_in_what(), &mc.metricFields);
+ translateFieldMatcher(link.fields_in_condition(), &mc.conditionFields);
+ mMetric2ConditionLinks.push_back(mc);
+ }
+ mConditionSliced = true;
}
- mConditionSliced = (metric.links().size() > 0)||
- (mDimensionsInCondition.has_field() && mDimensionsInCondition.child_size() > 0);
+
+ mConditionSliced = (metric.links().size() > 0) || (mDimensionsInCondition.size() > 0);
VLOG("metric %lld created. bucket size %lld start_time: %lld", (long long)metric.id(),
(long long)mBucketSizeNs, (long long)mStartTimeNs);
@@ -92,26 +101,6 @@
VLOG("Metric %lld onSlicedConditionMayChange", (long long)mMetricId);
}
-void CountMetricProducer::onDumpReportLocked(const uint64_t dumpTimeNs, StatsLogReport* report) {
- flushIfNeededLocked(dumpTimeNs);
- report->set_metric_id(mMetricId);
-
- auto count_metrics = report->mutable_count_metrics();
- for (const auto& counter : mPastBuckets) {
- CountMetricData* metricData = count_metrics->add_data();
- *metricData->mutable_dimensions_in_what() =
- counter.first.getDimensionKeyInWhat().getDimensionsValue();
- *metricData->mutable_dimensions_in_condition() =
- counter.first.getDimensionKeyInCondition().getDimensionsValue();
- for (const auto& bucket : counter.second) {
- CountBucketInfo* bucketInfo = metricData->add_bucket_info();
- bucketInfo->set_start_bucket_nanos(bucket.mBucketStartNs);
- bucketInfo->set_end_bucket_nanos(bucket.mBucketEndNs);
- bucketInfo->set_count(bucket.mCount);
- }
- }
-}
-
void CountMetricProducer::onDumpReportLocked(const uint64_t dumpTimeNs,
ProtoOutputStream* protoOutput) {
flushIfNeededLocked(dumpTimeNs);
@@ -122,8 +111,6 @@
protoOutput->write(FIELD_TYPE_INT64 | FIELD_ID_ID, (long long)mMetricId);
long long protoToken = protoOutput->start(FIELD_TYPE_MESSAGE | FIELD_ID_COUNT_METRICS);
- VLOG("metric %lld dump report now...",(long long)mMetricId);
-
for (const auto& counter : mPastBuckets) {
const MetricDimensionKey& dimensionKey = counter.first;
VLOG(" dimension key %s", dimensionKey.c_str());
@@ -134,15 +121,13 @@
// First fill dimension.
long long dimensionInWhatToken = protoOutput->start(
FIELD_TYPE_MESSAGE | FIELD_ID_DIMENSION_IN_WHAT);
- writeDimensionsValueProtoToStream(
- dimensionKey.getDimensionKeyInWhat().getDimensionsValue(), protoOutput);
+ writeDimensionToProto(dimensionKey.getDimensionKeyInWhat(), protoOutput);
protoOutput->end(dimensionInWhatToken);
if (dimensionKey.hasDimensionKeyInCondition()) {
long long dimensionInConditionToken = protoOutput->start(
FIELD_TYPE_MESSAGE | FIELD_ID_DIMENSION_IN_CONDITION);
- writeDimensionsValueProtoToStream(
- dimensionKey.getDimensionKeyInCondition().getDimensionsValue(), protoOutput);
+ writeDimensionToProto(dimensionKey.getDimensionKeyInCondition(), protoOutput);
protoOutput->end(dimensionInConditionToken);
}
@@ -200,7 +185,6 @@
const ConditionKey& conditionKey, bool condition,
const LogEvent& event) {
uint64_t eventTimeNs = event.GetTimestampNs();
-
flushIfNeededLocked(eventTimeNs);
if (condition == false) {