private static long ExerciseCounter(Counter counter, int nThreads, int nIncrements)
{
Task[] threads = new Task[nThreads];
Stopwatch sw = Stopwatch.StartNew();
for (int nThread = 0; nThread < threads.Length; nThread++)
{
threads[nThread] = Task.Factory.StartNew(() =>
{
for (int nIteration = 0; nIteration < nIncrements; nIteration++)
{
counter.Increment();
}
});
}
Task.WaitAll(threads);
sw.Stop();
return sw.ElapsedMilliseconds;
}
public static void Main()
{
Console.WriteLine("\n\nUnsafe test:");
asyncOpsAreDone.Reset();
numAsyncOps = totalNumberOfAsyncOps;
counter = new CounterUnsafe();
for (int threadNum = 0; threadNum < numAsyncOps; threadNum++)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(UpdateResource), threadNum);
}
asyncOpsAreDone.WaitOne();
Console.WriteLine("All Unsafe threads have completed.");
Console.WriteLine("\n\nLock test:");
asyncOpsAreDone.Reset();
numAsyncOps = totalNumberOfAsyncOps;
counter = new CounterUsingLock();
for (int threadNum = 0; threadNum < numAsyncOps; threadNum++)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(UpdateResource), threadNum);
}
asyncOpsAreDone.WaitOne();
Console.WriteLine("All Lock threads have completed.");
}
static void Main(string[] args)
{
Console.WriteLine("Press enter to start");
Console.ReadLine();
Counter[] counters = new Counter[]
{
new Counter(),
new InterlockedCounter(),
new MutexCounter(),
};
int nThreads = 2;
//int nIterations = 50000000;
int nIterations = 500000;
foreach (Counter counter in counters)
{
var elapsed = ExerciseCounter(counter, nThreads, nIterations);
Console.WriteLine("{2} Value = {0} Expected {1} in {3} ms",
counter.Value,
nThreads * nIterations,
counter.GetType().Name,
elapsed);
}
}
