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additional write buffer

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This commit is contained in:
Christian Köllner 2020-04-21 21:17:34 +02:00
parent db2d6bce2e
commit 73bd1de241
5 changed files with 106 additions and 7 deletions
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2
Benchmarking/Benchmark/Benchmark.csproj
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@ -7,7 +7,7 @@
<ItemGroup>
<PackageReference Include="BenchmarkDotNet" Version="0.12.0" />
<PackageReference Include="Capnp.Net.Runtime" Version="1.3.90-g65e87e5aa9" />
<PackageReference Include="Capnp.Net.Runtime" Version="1.3.92-gdb2d6bce2e" />
<PackageReference Include="CapnpC.CSharp.MsBuild.Generation" Version="1.2.138" />
<PackageReference Include="Google.Protobuf" Version="3.11.3" />
<PackageReference Include="Grpc.Net.Client" Version="2.27.0" />

3
Benchmarking/Benchmark/Program.cs
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@ -11,7 +11,10 @@ namespace Benchmark
{
static void Main(string[] args)
{
if (args.Length == 0 || args[0] == "grpc")
BenchmarkRunner.Run<GrpcBenchmark>();
if (args.Length == 0 || args[0] == "capnp")
BenchmarkRunner.Run<CapnpBenchmark>();
}
}

4
Benchmarking/EchoServiceCapnp/EchoServiceCapnp.csproj
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@ -6,8 +6,8 @@
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Capnp.Net.Runtime" Version="1.3.90-g65e87e5aa9" />
<PackageReference Include="CapnpC.CSharp.MsBuild.Generation" Version="1.2.138" />
<PackageReference Include="Capnp.Net.Runtime" Version="1.3.92-gdb2d6bce2e" />
<PackageReference Include="CapnpC.CSharp.MsBuild.Generation" Version="1.3.92-gdb2d6bce2e" />
</ItemGroup>
</Project>

4
Capnp.Net.Runtime/Rpc/MidlayerExtensions.cs
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@ -17,7 +17,7 @@ namespace Capnp.Rpc
/// <param name="bufferSize">Buffer size (bytes). You should choose it according to the maximum expected raw capnp frame size</param>
public static void AddBuffering(this ISupportsMidlayers obj, int bufferSize)
{
obj.InjectMidlayer(s => new Util.BufferedNetworkStreamAdapter(s, bufferSize));
obj.InjectMidlayer(s => new Util.WriteBufferedStream(new Util.BufferedNetworkStreamAdapter(s, bufferSize), bufferSize));
}
/// <summary>
@ -27,7 +27,7 @@ namespace Capnp.Rpc
/// <param name="obj"><see cref="TcpRpcServer"/> or <see cref="TcpRpcClient"/></param>
public static void AddBuffering(this ISupportsMidlayers obj)
{
obj.InjectMidlayer(s => new Util.BufferedNetworkStreamAdapter(s));
obj.InjectMidlayer(s => new Util.WriteBufferedStream(new Util.BufferedNetworkStreamAdapter(s)));
}
}
}

96
Capnp.Net.Runtime/Util/WriteBufferedStream.cs Normal file
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@ -0,0 +1,96 @@
using System;
using System.IO;
namespace Capnp.Util
{
internal class WriteBufferedStream : Stream
{
// A buffer size of 1024 bytes seems to be a good comprise, giving good performance
// in TCP/IP-over-localhost scenarios for small to medium (200kiB) frame sizes.
const int DefaultBufferSize = 1024;
readonly Stream _readStream;
readonly BufferedStream _writeStream;
readonly int _bufferSize;
readonly object _reentrancyBlocker = new object();
public WriteBufferedStream(Stream stream, int bufferSize)
{
_readStream = stream;
_writeStream = new BufferedStream(stream, bufferSize);
_bufferSize = bufferSize;
}
public WriteBufferedStream(Stream stream) : this(stream, DefaultBufferSize)
{
}
public override bool CanRead => true;
public override bool CanSeek => false;
public override bool CanWrite => true;
public override long Length => 0;
public override long Position
{
get => 0;
set => throw new NotSupportedException();
}
public override void Flush()
{
_writeStream.Flush();
}
public override int Read(byte[] buffer, int offset, int count)
{
return _readStream.Read(buffer, offset, count);
}
public override long Seek(long offset, SeekOrigin origin)
{
throw new NotSupportedException();
}
public override void SetLength(long value)
{
throw new NotSupportedException();
}
public override void Write(byte[] buffer, int offset, int count)
{
if (buffer.Length > _bufferSize) // avoid moiré-like timing effects
_writeStream.Flush();
_writeStream.Write(buffer, offset, count);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
lock (_reentrancyBlocker)
{
try
{
_readStream.Dispose();
}
catch
{
}
try
{
_writeStream.Dispose();
}
catch
{
}
}
}
base.Dispose(disposing);
}
}
}