124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
/*
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* LowLatency.actor.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fdbrpc/ContinuousSample.h"
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#include "fdbclient/IKnobCollection.h"
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#include "fdbclient/NativeAPI.actor.h"
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#include "fdbserver/TesterInterface.actor.h"
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#include "fdbclient/ReadYourWrites.h"
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#include "fdbserver/Knobs.h"
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#include "fdbserver/workloads/workloads.actor.h"
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#include "flow/actorcompiler.h" // This must be the last #include.
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struct LowLatencyWorkload : TestWorkload {
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double testDuration;
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double maxGRVLatency;
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double maxCommitLatency;
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double checkDelay;
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PerfIntCounter operations, retries;
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bool testWrites;
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Key testKey;
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bool ok;
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LowLatencyWorkload(WorkloadContext const& wcx)
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: TestWorkload(wcx), operations("Operations"), retries("Retries"), ok(true) {
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testDuration = getOption(options, LiteralStringRef("testDuration"), 600.0);
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maxGRVLatency = getOption(options, LiteralStringRef("maxGRVLatency"), 20.0);
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maxCommitLatency = getOption(options, LiteralStringRef("maxCommitLatency"), 30.0);
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checkDelay = getOption(options, LiteralStringRef("checkDelay"), 1.0);
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testWrites = getOption(options, LiteralStringRef("testWrites"), true);
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testKey = getOption(options, LiteralStringRef("testKey"), LiteralStringRef("testKey"));
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}
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std::string description() const override { return "LowLatency"; }
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Future<Void> setup(Database const& cx) override {
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if (g_network->isSimulated()) {
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IKnobCollection::getMutableGlobalKnobCollection().setKnob("min_delay_cc_worst_fit_candidacy_seconds",
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KnobValueRef::create(double{ 5.0 }));
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IKnobCollection::getMutableGlobalKnobCollection().setKnob("max_delay_cc_worst_fit_candidacy_seconds",
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KnobValueRef::create(double{ 10.0 }));
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}
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return Void();
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}
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Future<Void> start(Database const& cx) override {
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if (clientId == 0)
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return _start(cx, this);
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return Void();
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}
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ACTOR static Future<Void> _start(Database cx, LowLatencyWorkload* self) {
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state double testStart = now();
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try {
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loop {
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wait(delay(self->checkDelay));
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state Transaction tr(cx);
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state double operationStart = now();
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state bool doCommit = self->testWrites && deterministicRandom()->coinflip();
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state double maxLatency = doCommit ? self->maxCommitLatency : self->maxGRVLatency;
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++self->operations;
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loop {
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try {
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TraceEvent("StartLowLatencyTransaction").log();
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tr.setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
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tr.setOption(FDBTransactionOptions::LOCK_AWARE);
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if (doCommit) {
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tr.set(self->testKey, LiteralStringRef(""));
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wait(tr.commit());
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} else {
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wait(success(tr.getReadVersion()));
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}
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break;
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} catch (Error& e) {
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TraceEvent("LowLatencyTransactionFailed").error(e, true);
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wait(tr.onError(e));
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++self->retries;
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}
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}
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if (now() - operationStart > maxLatency) {
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TraceEvent(SevError, "LatencyTooLarge")
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.detail("MaxLatency", maxLatency)
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.detail("ObservedLatency", now() - operationStart)
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.detail("IsCommit", doCommit);
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self->ok = false;
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}
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if (now() - testStart > self->testDuration)
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break;
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}
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return Void();
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} catch (Error& e) {
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TraceEvent(SevError, "LowLatencyError").error(e, true);
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throw;
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}
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}
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Future<bool> check(Database const& cx) override { return ok; }
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void getMetrics(std::vector<PerfMetric>& m) override {
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double duration = testDuration;
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m.emplace_back("Operations/sec", operations.getValue() / duration, Averaged::False);
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m.push_back(operations.getMetric());
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m.push_back(retries.getMetric());
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}
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};
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WorkloadFactory<LowLatencyWorkload> LowLatencyWorkloadFactory("LowLatency");
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