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/**
* Copyright (C) 2023-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/tools/workload_simulation/simulation.h"
#include "mongo/db/transaction_resources.h"
#include "mongo/logv2/log.h"
#include "mongo/logv2/log_attr.h"
#include "mongo/logv2/log_component.h"
#include "mongo/tools/workload_simulation/simulator_options.h"
#include "mongo/util/pcre.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kTest
namespace mongo::workload_simulation {
namespace {
bool shouldRun(const Simulation& simulation) {
auto& suiteAllowList = simulatorGlobalParams.suites;
if (!suiteAllowList.empty() &&
std::find(suiteAllowList.begin(), suiteAllowList.end(), simulation.suiteName()) ==
suiteAllowList.end()) {
LOGV2_DEBUG(7782102,
3,
"Skipped workload due to suite exclusion",
"suite"_attr = simulation.suiteName(),
"workload"_attr = simulation.workloadName());
return false;
}
auto& workloadFilter = simulatorGlobalParams.filter;
if (!workloadFilter.empty()) {
pcre::Regex workloadFilterRe{workloadFilter};
if (!workloadFilterRe.matchView(simulation.workloadName())) {
LOGV2_DEBUG(7782103,
3,
"Skipped workload due to filter",
"suite"_attr = simulation.suiteName(),
"workload"_attr = simulation.workloadName());
return false;
}
}
return true;
}
} // namespace
Simulation::Simulation(StringData suiteName, StringData workloadName)
: _suiteName(suiteName.toString()), _workloadName(workloadName.toString()) {}
Simulation::~Simulation() {}
void Simulation::setup() {
_svcCtx = ServiceContext::make();
_client = _svcCtx->getService()->makeClient(suiteName());
_tickSource = initTickSourceMock<ServiceContext, Nanoseconds>(_svcCtx.get());
_eventQueue = std::make_unique<EventQueue>(*_tickSource, [this]() {
// Make the queue wait to process events until it has the same number of events queued as we
// have busy actors. Otherwise it may advance the clock before we have a chance to queue our
// events.
return actorCount();
});
// We need to advance the ticks to something other than zero for most things to behave well.
_tickSource->advance(Milliseconds{1});
}
void Simulation::teardown() {
if (_monitor.joinable()) {
_stopping.store(true);
_monitor.join();
}
queue().stop();
queue().clear();
}
void Simulation::_doRun() {}
void Simulation::run() {
setup();
LOGV2_INFO(7782100, "Starting simulation", "workload"_attr = workloadName());
queue().start();
_monitor = stdx::thread([this]() {
// The monitoring interval of 200ms is definitely a bit of a magic number, and was
// selected experimentally as the value that "just so happens" to produce lovely, smooth
// graphs. A shorter interval produces very messy graphs, and would require
// super-sampling in the processing scripts, and a longer interval misses many of the
// probing events (this part is related to the default 100ms probing interval, and is
// less magic).
auto monitoringInterval = Milliseconds(200);
while (!_stopping.load()) {
if (queue().wait_for(monitoringInterval, EventQueue::WaitType::Observer)) {
auto m = metrics();
if (m) {
LOGV2_INFO(7782101,
"Workload metrics",
"metrics"_attr = m.value(),
"time"_attr = _tickSource->getTicks());
}
}
}
});
_doRun();
queue().prepareStop();
teardown();
}
std::string Simulation::suiteName() const {
return _suiteName;
}
std::string Simulation::workloadName() const {
return _workloadName;
}
EventQueue& Simulation::queue() {
return *_eventQueue;
}
ServiceContext* Simulation::svcCtx() {
return _svcCtx.get();
}
Client* Simulation::client() {
return _client.get();
}
SimulationRegistry& SimulationRegistry::get() {
static SimulationRegistry registry;
return registry;
}
void SimulationRegistry::runSelected() {
for (auto&& workload : _workloads) {
if (shouldRun(*workload)) {
workload->run();
}
}
}
void SimulationRegistry::registerSimulation(std::unique_ptr<Simulation>&& simulation) {
// Ensure we don't already have this workload registered.
invariant(!_workloads.contains(simulation));
_workloads.emplace(std::move(simulation));
}
void SimulationRegistry::list() const {
std::string currentSuite = "";
for (auto&& workload : _workloads) {
if (currentSuite != workload->suiteName()) {
currentSuite = workload->suiteName();
std::cout << currentSuite << std::endl;
}
std::cout << " - " << workload->workloadName() << std::endl;
}
}
} // namespace mongo::workload_simulation
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