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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Threading;
using System.Collections;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Text;
using System.Xml;
using System.Runtime;
using System.Diagnostics;
namespace GCTest
{
public class GCTestC
{
private static int loid = 0; // to give a "unique" identifier
private static Stopwatch s_stopWatch = new Stopwatch();
public static void Usage()
{
Console.WriteLine("Usage");
Console.WriteLine("LowLatency.exe <iterations> <lowlatency|interactive|batch>");
}
static void Main(string[] args)
{
if (args.Length != 2)
{
Usage();
return;
}
int iters = 0;
if (!Int32.TryParse(args[0], out iters))
{
Usage();
return;
}
GCLatencyMode gcMode;
switch (args[1].ToLower())
{
case "lowlatency":
gcMode = GCLatencyMode.LowLatency;
break;
case "interactive":
gcMode = GCLatencyMode.Interactive;
break;
case "batch":
gcMode = GCLatencyMode.Batch;
break;
default:
Usage();
return;
}
GCTestC test = new GCTestC();
test.DoTest(iters, gcMode);
}
private void LoadData(int count)
{
loid++;
Hashtable aMap = new Hashtable(count);
byte[] aBuffer = null;
long maxElapsed = 0;
string clunieFile = Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location), "clunie_small.xml");
using (StreamReader reader = new StreamReader(clunieFile))
{
aBuffer = new byte[reader.BaseStream.Length];
reader.BaseStream.Read(aBuffer, 0, (int)reader.BaseStream.Length);
}
using (MemoryStream aMemStream = new MemoryStream(aBuffer))
{
aBuffer = null;
s_stopWatch.Restart();
for (int i = 0; i < count; i++)
{
Thread.Sleep(0); // simulate waiting on arrival of new data...
// create XmlDocuments
XmlDocument aXmlDoc = new XmlDocument();
aXmlDoc.Load(aMemStream);
aMap.Add("1.2.3" + loid.ToString() + i.ToString(), aXmlDoc);
aXmlDoc = null;
// reset the position in the memory stream to the beginning
aMemStream.Seek(0, SeekOrigin.Begin);
s_stopWatch.Stop();
if (maxElapsed < s_stopWatch.ElapsedMilliseconds)
{
maxElapsed = s_stopWatch.ElapsedMilliseconds;
}
}
Console.WriteLine("Maximum of {0}: {1}", count, maxElapsed);
}
}
public void DoTest(int count, GCLatencyMode gcMode)
{
GCLatencyMode oldMode = GCSettings.LatencyMode;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
// Load Data
GCSettings.LatencyMode = gcMode;
LoadData(count);
}
finally
{
GCSettings.LatencyMode = oldMode;
}
}
}
}
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