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#include <QtTest>
#include <QString>
#include "testimplementations.h"
#include <common/facade.h>
#include <common/domainadaptor.h>
#include <common/resultprovider.h>
#include <common/synclistresult.h>
#include <common/definitions.h>
#include <common/query.h>
#include <common/store.h>
#include "hawd/dataset.h"
#include "hawd/formatter.h"
#include <iostream>
#include <math.h>
#include "event_generated.h"
#include "getrssusage.h"
/**
* Benchmark read performance of the facade implementation.
*
* The memory used should grow linearly with the number of retrieved entities.
* The memory used should be independent from the database size, after accounting for the memory mapped db.
*/
class DatabasePopulationAndFacadeQueryBenchmark : public QObject
{
Q_OBJECT
QByteArray identifier;
QList<double> mRssGrowthPerEntity;
QList<double> mTimePerEntity;
HAWD::State mHawdState;
void populateDatabase(int count)
{
Sink::Storage::DataStore(Sink::storageLocation(), "identifier", Sink::Storage::DataStore::ReadWrite).removeFromDisk();
// Setup
auto domainTypeAdaptorFactory = QSharedPointer<TestEventAdaptorFactory>::create();
{
Sink::Storage::DataStore storage(Sink::storageLocation(), identifier, Sink::Storage::DataStore::ReadWrite);
auto transaction = storage.createTransaction(Sink::Storage::DataStore::ReadWrite);
auto db = Sink::Storage::DataStore::mainDatabase(transaction, "event");
int bufferSizeTotal = 0;
int keysSizeTotal = 0;
QByteArray attachment;
attachment.fill('c', 1000);
for (int i = 0; i < count; i++) {
auto domainObject = Sink::ApplicationDomain::Event::Ptr::create();
domainObject->setProperty("uid", "uid");
domainObject->setProperty("summary", QString("summary%1").arg(i));
domainObject->setProperty("attachment", attachment);
flatbuffers::FlatBufferBuilder fbb;
domainTypeAdaptorFactory->createBuffer(*domainObject, fbb);
const auto buffer = QByteArray::fromRawData(reinterpret_cast<const char *>(fbb.GetBufferPointer()), fbb.GetSize());
const auto key = Sink::Storage::DataStore::generateUid();
db.write(key, buffer);
bufferSizeTotal += buffer.size();
keysSizeTotal += key.size();
}
transaction.commit();
transaction = storage.createTransaction(Sink::Storage::DataStore::ReadOnly);
db = Sink::Storage::DataStore::mainDatabase(transaction, "event");
auto dataSizeTotal = count * (QByteArray("uid").size() + QByteArray("summary").size() + attachment.size());
auto size = db.getSize();
auto onDisk = storage.diskUsage();
auto writeAmplification = static_cast<double>(onDisk) / static_cast<double>(bufferSizeTotal);
std::cout << "Database size [kb]: " << size / 1024 << std::endl;
std::cout << "On disk [kb]: " << onDisk / 1024 << std::endl;
std::cout << "Buffer size total [kb]: " << bufferSizeTotal / 1024 << std::endl;
std::cout << "Key size total [kb]: " << keysSizeTotal / 1024 << std::endl;
std::cout << "Data size total [kb]: " << dataSizeTotal / 1024 << std::endl;
std::cout << "Write amplification: " << writeAmplification << std::endl;
// The buffer has an overhead, but with a reasonable attachment size it should be relatively small
// A write amplification of 2 should be the worst case
QVERIFY(writeAmplification < 2);
}
}
void testLoad(int count)
{
const auto startingRss = getCurrentRSS();
Sink::Query query;
query.requestedProperties << "uid"
<< "summary";
// Benchmark
QTime time;
time.start();
auto resultSet = QSharedPointer<Sink::ResultProvider<Sink::ApplicationDomain::Event::Ptr>>::create();
auto resourceAccess = QSharedPointer<TestResourceAccess>::create();
QMap<QByteArray, DomainTypeAdaptorFactoryInterface::Ptr> factories;
factories.insert("event", QSharedPointer<TestEventAdaptorFactory>::create());
Sink::ResourceContext context{identifier, "test", factories};
context.mResourceAccess = resourceAccess;
TestResourceFacade facade(context);
auto ret = facade.load(query, Sink::Log::Context{"benchmark"});
ret.first.exec().waitForFinished();
auto emitter = ret.second;
QList<Sink::ApplicationDomain::Event::Ptr> list;
emitter->onAdded([&list](const Sink::ApplicationDomain::Event::Ptr &event) { list << event; });
bool done = false;
emitter->onInitialResultSetComplete([&done](const Sink::ApplicationDomain::Event::Ptr &event, bool) { done = true; });
emitter->fetch(Sink::ApplicationDomain::Event::Ptr());
QTRY_VERIFY(done);
QCOMPARE(list.size(), count);
const auto elapsed = time.elapsed();
const auto finalRss = getCurrentRSS();
const auto rssGrowth = finalRss - startingRss;
// Since the database is memory mapped it is attributted to the resident set size.
const auto rssWithoutDb = finalRss - Sink::Storage::DataStore(Sink::storageLocation(), identifier, Sink::Storage::DataStore::ReadWrite).diskUsage();
const auto peakRss = getPeakRSS();
// How much peak deviates from final rss in percent (should be around 0)
const auto percentageRssError = static_cast<double>(peakRss - finalRss) * 100.0 / static_cast<double>(finalRss);
auto rssGrowthPerEntity = rssGrowth / count;
std::cout << "Loaded " << list.size() << " results." << std::endl;
std::cout << "The query took [ms]: " << elapsed << std::endl;
std::cout << "Current Rss usage [kb]: " << finalRss / 1024 << std::endl;
std::cout << "Peak Rss usage [kb]: " << peakRss / 1024 << std::endl;
std::cout << "Rss growth [kb]: " << rssGrowth / 1024 << std::endl;
std::cout << "Rss growth per entity [byte]: " << rssGrowthPerEntity << std::endl;
std::cout << "Rss without db [kb]: " << rssWithoutDb / 1024 << std::endl;
std::cout << "Percentage error: " << percentageRssError << std::endl;
HAWD::Dataset dataset("facade_query", mHawdState);
HAWD::Dataset::Row row = dataset.row();
row.setValue("rows", list.size());
row.setValue("queryResultPerMs", (qreal)list.size() / elapsed);
dataset.insertRow(row);
HAWD::Formatter::print(dataset);
mTimePerEntity << static_cast<double>(elapsed) / static_cast<double>(count);
mRssGrowthPerEntity << rssGrowthPerEntity;
QVERIFY(percentageRssError < 10);
// TODO This is much more than it should it seems, although adding the attachment results in pretty exactly a 1k increase,
// so it doesn't look like that memory is being duplicated.
QVERIFY(rssGrowthPerEntity < 3300);
// Print memory layout, RSS is what is in memory
// std::system("exec pmap -x \"$PPID\"");
// std::system("top -p \"$PPID\" -b -n 1");
}
private slots:
void init()
{
identifier = "identifier";
}
void test1k()
{
populateDatabase(1000);
testLoad(1000);
}
void test2k()
{
populateDatabase(2000);
testLoad(2000);
}
void test5k()
{
populateDatabase(5000);
testLoad(5000);
}
// void test10k()
// {
// populateDatabase(10000);
// testLoad(10000);
// }
static double variance(const QList<double> &values)
{
double mean = 0;
for (auto value : values) {
mean += value;
}
mean = mean / static_cast<double>(values.size());
double variance = 0;
for (auto value : values) {
variance += pow(static_cast<double>(value) - mean, 2);
}
variance = variance / static_cast<double>(values.size() - 1);
return variance;
}
static double maxDifference(const QList<double> &values)
{
auto max = values.first();
auto min = values.first();
for (auto value : values) {
if (value > max) {
max = value;
}
if (value < min) {
min = value;
}
}
return max - min;
}
void ensureUsedMemoryRemainsStable()
{
auto rssStandardDeviation = sqrt(variance(mRssGrowthPerEntity));
auto timeStandardDeviation = sqrt(variance(mTimePerEntity));
std::cout << "Rss standard deviation " << rssStandardDeviation << std::endl;
std::cout << "Rss max difference [byte]" << maxDifference(mRssGrowthPerEntity) << std::endl;
std::cout << "Time standard deviation " << timeStandardDeviation << std::endl;
std::cout << "Time max difference [ms]" << maxDifference(mTimePerEntity) << std::endl;
QVERIFY(rssStandardDeviation < 500);
QVERIFY(timeStandardDeviation < 1);
}
};
QTEST_MAIN(DatabasePopulationAndFacadeQueryBenchmark)
#include "databasepopulationandfacadequerybenchmark.moc"
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