public void TestThreadPoolPerformance()
{
const int numberOfOperations = 100000;
var ssw = new SplitStopwatch();
// Test without any threadPool.
ssw.Start("SINGLE THREADED WITHOUT POOL:");
for (var i = 0; i < numberOfOperations; i++)
{
CalcAverage(GetNumbersForAverage());
}
ssw.Stop("Done.", 1);
Console.Out.WriteLine(string.Empty);
ssw.Reset();
for (var numberOfWorkerThreads = 1;
numberOfWorkerThreads < Environment.ProcessorCount * 2;
numberOfWorkerThreads++)
{
ssw.Start("THREADPOOL (" + numberOfWorkerThreads + " workerThreads):");
threadPool = new ThreadPool(numberOfWorkerThreads, "testWorker");
ssw.Split("Starting to enqueue.", 1);
for (var i = 0; i < numberOfOperations; i++)
{
threadPool.EnqueueWorkItem(CalcAverage, GetNumbersForAverage());
}
ssw.Split("All items are enqueued.", 1);
threadPool.WaitForEveryWorkerIdle();
threadPool.ShutDown();
ssw.Stop("Done.", 1);
Console.Out.WriteLine(string.Empty);
ssw.Reset();
}
}
public void TestThreadPool()
{
threadPool = new ThreadPool(Environment.ProcessorCount, "testWorker");
var ssw = new SplitStopwatch();
ssw.Start("starting to enqueue...");
var wir1 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir2 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 1, 1, 1, 1 });
var wir3 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir4 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir5 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir6 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir7 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir8 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir9 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
var wir10 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
ssw.Split("all items are enqueued...");
var average = wir1.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 1...");
wir1.Dispose();
average = wir2.Result;
Assert.AreEqual(average, 1.0);
ssw.Split("we waited for result 2...");
wir2.Dispose();
average = wir3.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 3...");
wir3.Dispose();
average = wir4.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 4...");
wir4.Dispose();
average = wir5.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 5...");
wir5.Dispose();
average = wir6.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 6...");
wir6.Dispose();
average = wir7.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 7...");
wir7.Dispose();
average = wir8.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 8...");
wir8.Dispose();
average = wir9.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 9...");
wir9.Dispose();
average = wir10.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 10...");
wir10.Dispose();
var wir11 = threadPool.EnqueueWorkItem(CalcAverage, new[] { 2, 3, 2, 5 });
average = wir11.Result;
Assert.AreEqual(average, 3.0);
ssw.Split("we waited for result 11...");
wir11.Dispose();
threadPool.ShutDown();
}