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#region Copyright notice and license
// Copyright 2015-2016, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using Google.Protobuf;
using Grpc.Core;
using Grpc.Core.Utils;
using NUnit.Framework;
using Grpc.Testing;
namespace Grpc.IntegrationTesting
{
/// <summary>
/// Helper methods to start client runners for performance testing.
/// </summary>
public static class ClientRunners
{
/// <summary>
/// Creates a started client runner.
/// </summary>
public static IClientRunner CreateStarted(ClientConfig config)
{
string target = config.ServerTargets.Single();
GrpcPreconditions.CheckArgument(config.LoadParams.LoadCase == LoadParams.LoadOneofCase.ClosedLoop);
var credentials = config.SecurityParams != null ? TestCredentials.CreateSslCredentials() : ChannelCredentials.Insecure;
var channel = new Channel(target, credentials);
switch (config.RpcType)
{
case RpcType.UNARY:
return new SyncUnaryClientRunner(channel,
config.PayloadConfig.SimpleParams.ReqSize,
config.HistogramParams);
case RpcType.STREAMING:
default:
throw new ArgumentException("Unsupported RpcType.");
}
}
}
/// <summary>
/// Client that starts synchronous unary calls in a closed loop.
/// </summary>
public class SyncUnaryClientRunner : IClientRunner
{
const double SecondsToNanos = 1e9;
readonly Channel channel;
readonly int payloadSize;
readonly Histogram histogram;
readonly BenchmarkService.IBenchmarkServiceClient client;
readonly Task runnerTask;
readonly CancellationTokenSource stoppedCts;
readonly WallClockStopwatch wallClockStopwatch = new WallClockStopwatch();
public SyncUnaryClientRunner(Channel channel, int payloadSize, HistogramParams histogramParams)
{
this.channel = GrpcPreconditions.CheckNotNull(channel);
this.payloadSize = payloadSize;
this.histogram = new Histogram(histogramParams.Resolution, histogramParams.MaxPossible);
this.stoppedCts = new CancellationTokenSource();
this.client = BenchmarkService.NewClient(channel);
this.runnerTask = Task.Factory.StartNew(Run, TaskCreationOptions.LongRunning);
}
public ClientStats GetStats(bool reset)
{
var histogramData = histogram.GetSnapshot(reset);
var secondsElapsed = wallClockStopwatch.GetElapsedSnapshot(reset).TotalSeconds;
// TODO: populate user time and system time
return new ClientStats
{
Latencies = histogramData,
TimeElapsed = secondsElapsed,
TimeUser = 0,
TimeSystem = 0
};
}
public async Task StopAsync()
{
stoppedCts.Cancel();
await runnerTask;
await channel.ShutdownAsync();
}
private void Run()
{
var request = new SimpleRequest
{
Payload = CreateZerosPayload(payloadSize)
};
var stopwatch = new Stopwatch();
while (!stoppedCts.Token.IsCancellationRequested)
{
stopwatch.Restart();
client.UnaryCall(request);
stopwatch.Stop();
// spec requires data point in nanoseconds.
histogram.AddObservation(stopwatch.Elapsed.TotalSeconds * SecondsToNanos);
}
}
private static Payload CreateZerosPayload(int size)
{
return new Payload { Body = ByteString.CopyFrom(new byte[size]) };
}
}
}
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