private void AllocateObjects(IMethodLogger logger, long numberOfTopLevelDummyObjects)
{
var startMemory = GC.GetTotalMemory(false);
var list = new List<DummyObject>();
for (long l = 0; l < numberOfTopLevelDummyObjects; l++)
{
list.Add(new DummyObject());
}
logger.WriteMethodInfo(
string.Format(
"Total Number of Objects [{0:n0}]. Max Depth of Object Graph [{1:n0}]",
list.Sum(d => d.CalculateTotalNumberOfObjects()),
list.Max(d => d.CalculateMaxDepth())));
logger.WriteMethodInfo("");
logger.WriteMethodInfo(
string.Format(
"Approx difference in Bytes of Managed Heap after allocation " +
"[{0:n0}] bytes.",
(GC.GetTotalMemory(false) - startMemory)));
logger.WriteMethodInfo("");
}
public void Execute(IMethodLogger logger, List<SamplerMethodParameter> parameters)
{
var startMemory = GC.GetTotalMemory(false);
GC.Collect(0, GCCollectionMode.Forced,true);
GC.Collect(1, GCCollectionMode.Forced, true);
GC.Collect(2, GCCollectionMode.Forced, true);
logger.WriteMethodInfo("");
logger.WriteMethodInfo(
string.Format(
"Approx difference in Bytes of Managed Heap after GC (should be negative) " +
"[{0:n0}] bytes.",
(GC.GetTotalMemory(false) - startMemory)));
logger.WriteMethodInfo("");
}
private void AllocateObjects(IMethodLogger logger, long numberOfFloats)
{
var startMemory = GC.GetTotalMemory(false);
var array = new float[numberOfFloats];
for (long l = 0; l < numberOfFloats; l++)
{
array[l] = 1;
}
logger.WriteMethodInfo("");
logger.WriteMethodInfo(
string.Format(
"Approx difference in Bytes of Managed Heap after allocation. (0 is expected)" +
"[{0:n0}] bytes.",
(GC.GetTotalMemory(false) - startMemory)));
logger.WriteMethodInfo("");
}
private async Task WriteAndReadToDiskAsync(
IMethodLogger logger, int numberOfCharactersPerRow, long numberOfRows)
{
var tempFile = new TempFileCreator().CreateTempFile();
logger.WriteMethodInfo("Temp File: [" + tempFile + "]");
var random = new Random(DateTime.Now.Second);
// ReSharper disable once ReturnValueOfPureMethodIsNotUsed
random.Next();
var stopwatch = Stopwatch.StartNew();
try
{
using (var fs = File.OpenWrite(tempFile))
using (var sw = new StreamWriter(fs))
{
for (long r = 0; r < numberOfRows; r++)
{
var row = new StringBuilder(numberOfCharactersPerRow);
for (var i = 0; i < numberOfCharactersPerRow; i++)
{
row.Append(char.ConvertFromUtf32(random.Next(48, 122)));
}
await sw.WriteLineAsync(row.ToString());
}
}
}
catch (Exception e)
{
throw new Exception(
"Exception writing to temp file [" + tempFile + "]. " +
"Try running with Administrator permissions: " + e.Message +
Environment.NewLine + e.StackTrace, e);
}
logger.WriteMethodInfo("Wrote file in [" + stopwatch.ElapsedMilliseconds + "] milliseconds.");
try
{
using (var fs = File.OpenRead(tempFile))
using (var sr = new StreamReader(fs))
{
var allText = await sr.ReadToEndAsync();
if (string.IsNullOrEmpty(allText))
throw new Exception(
"This exception is here to ensure the compiler does not 'optimize' away" +
"the sr.ReadToEnd() call. This exception should never be hit.");
}
}
catch (Exception e)
{
throw new Exception(
"Exception reading from temp file [" + tempFile + "]. " +
"Try running with Administrator permissions: " + e.Message +
Environment.NewLine + e.StackTrace, e);
}
try
{
File.Delete(tempFile);
}
catch (Exception e)
{
throw new Exception(
"Exception deleting temp file [" + tempFile + "]. " +
"Try running with Administrator permissions: " + e.Message +
Environment.NewLine + e.StackTrace, e);
}
}
private void RequestRiverBedHomePageAsync(
IMethodLogger logger, int numberOfRequestsToMake)
{
var requestTimes = new ConcurrentBag<long>();
int htmlLength = 0;
try
{
var tasks =
Enumerable.Range(0, numberOfRequestsToMake)
.Select(async x =>
{
var requestStopWatch = Stopwatch.StartNew();
var webClient = new WebClient();
using (var stream = await webClient.OpenReadTaskAsync(new Uri("http://www.riverbed.com")))
using (var sr = new StreamReader(stream))
{
var html = await sr.ReadToEndAsync();
htmlLength = html.Length;
}
requestTimes.Add(requestStopWatch.ElapsedMilliseconds);
});
Task.WaitAll(tasks.ToArray());
}
catch (Exception e)
{
throw new Exception("Error getting http://www.riverbed.com: " + e.Message +
Environment.NewLine + e.StackTrace);
}
logger.WriteMethodInfo(
string.Format("Html Length [{0:n0}] chars. Request Times: Min [{1:n0}] Avg [{2:n0}] Max [{3:n0}]",
htmlLength, requestTimes.Min(), requestTimes.Average(), requestTimes.Max()));
logger.WriteMethodInfo("");
}
private void SendTcpTraffic(
IMethodLogger logger,
string address, int port,
string message, int messageInflationCount,
int numberOfTimes, int simulatedPacketDelayInMilliseconds)
{
string serverResponse = "";
var requestTimes = new List<long>(numberOfTimes);
var sb = new StringBuilder(message, message.Length * messageInflationCount);
for (var i = 1; i < messageInflationCount; i++)
{
sb.Append(message);
}
message = sb.ToString();
for (var i = 0; i < numberOfTimes; i++)
{
System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
var requestStopWatch = Stopwatch.StartNew();
try
{
client.Connect(address, port);
}
catch (Exception e)
{
throw new Exception(
string.Format(
"Failed to connect Tcp Client to [{0}:{1}]: {2} {3} {4}",
address, port, e.Message, Environment.NewLine, e.StackTrace));
}
try
{
var data = Encoding.UTF8.GetBytes(message);
using (var stream = client.GetStream())
{
stream.Write(data, 0, data.Length);
stream.Flush();
var allData = new List<byte>();
var receiveBuffer = new byte[1024];
while (true)
{
var chunkLength = stream.Read(receiveBuffer, 0, receiveBuffer.Length);
if (chunkLength < receiveBuffer.Length)
{
//end of message
allData.AddRange(receiveBuffer.Take(chunkLength));
break;
}
allData.AddRange(receiveBuffer);
if (simulatedPacketDelayInMilliseconds > 0)
Thread.Sleep(simulatedPacketDelayInMilliseconds);
}
serverResponse = Encoding.UTF8.GetString(allData.ToArray(), 0, allData.Count);
}
}
catch (Exception e)
{
throw new Exception("Exception talking with server: " +
e.Message + Environment.NewLine + e.StackTrace);
}
var checkMessage =
message.Length > 100
? message.Substring(0, 100)
: message;
if (!serverResponse.Contains(checkMessage))
throw new Exception(
"Server returned junk. Expected it to echo message but it did not." +
"Expected it to contain [" + checkMessage + "]. Response: [" + serverResponse + "]");
requestTimes.Add(requestStopWatch.ElapsedMilliseconds);
}
logger.WriteMethodInfo("");
logger.WriteMethodInfo(
string.Format("Server Response [{0}]",serverResponse));
logger.WriteMethodInfo(
string.Format("Request Times: Min [{0:n0}] Avg [{1:n0}] Max [{2:n0}]",
requestTimes.Min(), requestTimes.Average(), requestTimes.Max()));
}
private void RequestRiverBedHomePageMultiThreaded(
IMethodLogger logger, int numberOfRequestsToMake, int numberOfThreads)
{
var requestTimes = new ConcurrentBag<long>();
int htmlLength = 0;
try
{
Parallel.For(0, numberOfRequestsToMake,
new ParallelOptions { MaxDegreeOfParallelism = numberOfThreads },
i =>
{
var requestStopWatch = Stopwatch.StartNew();
var webClient = new WebClient();
using (var stream = webClient.OpenRead(new Uri("http://www.riverbed.com")))
// ReSharper disable once AssignNullToNotNullAttribute -- will handle in parent catch
using (var sr = new StreamReader(stream))
{
var html = sr.ReadToEnd();
htmlLength = html.Length;
}
requestTimes.Add(requestStopWatch.ElapsedMilliseconds);
});
}
catch (Exception e)
{
throw new Exception("Error getting http://www.riverbed.com: " + e.Message +
Environment.NewLine + e.StackTrace);
}
logger.WriteMethodInfo(
string.Format("Html Length [{0:n0}] chars. Request Times: Min [{1:n0}] Avg [{2:n0}] Max [{3:n0}]",
htmlLength, requestTimes.Min(), requestTimes.Average(), requestTimes.Max()));
logger.WriteMethodInfo("");
}
private void SumNumbersInArray(IMethodLogger logger, long numberOfTimesToCount, int numberOfThreadsToUse)
{
Parallel.For(0, numberOfTimesToCount,
new ParallelOptions
{
MaxDegreeOfParallelism = numberOfThreadsToUse
},
l =>
{
var sum = _array.Sum();
if (sum < 0)
throw new Exception(
"This exception is here to ensure the compiler did not 'optimize' away the call to _array.Sum(). It should never be hit.");
});
logger.WriteMethodInfo(
string.Format("Sum is [{0:n0}]", _array.Sum()));
}
private void SumNumbersInArray(IMethodLogger logger, long numberOfTimesToCount)
{
for (long l = 0; l < numberOfTimesToCount; l++)
{
var sum = _array.Sum();
if (sum < 0)
throw new Exception(
"This exception is here to ensure the compiler did not 'optimize' " +
"away the call to _array.Sum(). It should never be hit.");
}
logger.WriteMethodInfo(
string.Format("Sum is [{0:n0}]", _array.Sum()));
}
private void RequestRiverBedHomePage(IMethodLogger logger, int numberOfRequestsToMake)
{
var requestTimes = new List<long>(numberOfRequestsToMake);
int htmlLength = 0;
try
{
for (var i = 0; i < numberOfRequestsToMake; i++)
{
var requestStopWatch = Stopwatch.StartNew();
var webClient = new WebClient();
using (var stream = webClient.OpenRead("http://www.riverbed.com"))
// ReSharper disable once AssignNullToNotNullAttribute -- will handle in catch clause
using (var sr = new StreamReader(stream))
{
var html = sr.ReadToEnd();
htmlLength = html.Length;
}
requestTimes.Add(requestStopWatch.ElapsedMilliseconds);
}
}
catch (Exception e)
{
throw new Exception("Error getting http://www.riverbed.com: " + e.Message +
Environment.NewLine + e.StackTrace);
}
logger.WriteMethodInfo(
string.Format("Html Length [{0:n0}] chars. Request Times: Min [{1:n0}] Avg [{2:n0}] Max [{3:n0}]",
htmlLength, requestTimes.Min(), requestTimes.Average(), requestTimes.Max()));
}