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/MetricProducer.h b/cmds/statsd/src/metrics/MetricProducer.h
index 542dd8a..e8f8299 100644
--- a/cmds/statsd/src/metrics/MetricProducer.h
+++ b/cmds/statsd/src/metrics/MetricProducer.h
@@ -19,6 +19,7 @@
#include <shared_mutex>
+#include "HashableDimensionKey.h"
#include "anomaly/AnomalyTracker.h"
#include "condition/ConditionWizard.h"
#include "config/ConfigKey.h"
@@ -109,11 +110,6 @@
std::lock_guard<std::mutex> lock(mMutex);
return onDumpReportLocked(dumpTimeNs, protoOutput);
}
- // This method does not clear the past buckets.
- void onDumpReport(const uint64_t dumpTimeNs, StatsLogReport* report) {
- std::lock_guard<std::mutex> lock(mMutex);
- return onDumpReportLocked(dumpTimeNs, report);
- }
void dumpStates(FILE* out, bool verbose) const {
std::lock_guard<std::mutex> lock(mMutex);
@@ -150,7 +146,6 @@
virtual void onSlicedConditionMayChangeLocked(const uint64_t eventTime) = 0;
virtual void onDumpReportLocked(const uint64_t dumpTimeNs,
android::util::ProtoOutputStream* protoOutput) = 0;
- virtual void onDumpReportLocked(const uint64_t dumpTimeNs, StatsLogReport* report) = 0;
virtual size_t byteSizeLocked() const = 0;
virtual void dumpStatesLocked(FILE* out, bool verbose) const = 0;
@@ -203,10 +198,10 @@
int mConditionTrackerIndex;
- FieldMatcher mDimensionsInWhat; // The dimensions_in_what defined in statsd_config
- FieldMatcher mDimensionsInCondition; // The dimensions_in_condition defined in statsd_config
+ vector<Matcher> mDimensionsInWhat; // The dimensions_in_what defined in statsd_config
+ vector<Matcher> mDimensionsInCondition; // The dimensions_in_condition defined in statsd_config
- std::vector<MetricConditionLink> mConditionLinks;
+ std::vector<Metric2Condition> mMetric2ConditionLinks;
std::vector<sp<AnomalyTracker>> mAnomalyTrackers;