public void TestSingleAddSteal()
{
ThreadPoolLocalQueue q = new ThreadPoolLocalQueue();
Assert.IsTrue(q.TryAddLocal(new TestThreadPoolItem(1)));
ThreadPoolWorkItem item = null;
Assert.IsTrue(q.TrySteal(out item));
Assert.IsNotNull(item);
Assert2.AreEqual(1, item);
}
private void RunLocalThreadQueueAddStealTest(ThreadPoolLocalQueue q, int elemCount, int fillFactor)
{
Random rnd = new Random();
int addElem = 0;
int takeElem = 0;
List <int> takenIndexes = new List <int>(elemCount + 1);
while (takeElem < elemCount)
{
int addCount = rnd.Next(fillFactor);
for (int i = 0; i < addCount; i++)
{
if (addElem >= elemCount || !q.TryAddLocal(new TestThreadPoolItem(addElem)))
{
break;
}
addElem++;
}
int removeCount = rnd.Next(fillFactor);
for (int i = 0; i < removeCount; i++)
{
ThreadPoolWorkItem tmp = null;
if (!q.TrySteal(out tmp))
{
break;
}
Assert.IsNotNull(tmp);
takenIndexes.Add((TestThreadPoolItem)tmp);
takeElem++;
}
}
Assert.AreEqual(elemCount, takenIndexes.Count);
takenIndexes.Sort();
for (int i = 0; i < elemCount; i++)
{
Assert.AreEqual(i, takenIndexes[i]);
}
}
public void TestAddStealUpToTheLimit()
{
ThreadPoolLocalQueue q = new ThreadPoolLocalQueue();
int index = 0;
while (q.TryAddLocal(new TestThreadPoolItem(index)))
{
index++;
Assert.IsTrue(index < int.MaxValue);
}
int index2 = 0;
ThreadPoolWorkItem item = null;
while (q.TrySteal(out item))
{
Assert.IsNotNull(item);
Assert.IsTrue((TestThreadPoolItem)item == index2++);
}
Assert.AreEqual(index, index2);
}
private void RunLocalThreadQueuePrimaryScenario(ThreadPoolLocalQueue q, int elemCount, int slealThCount, int fillFactor)
{
int trackElemCount = elemCount;
int addFinished = 0;
int atomicRandom = 0;
Thread mainThread = null;
Thread[] stealThreads = new Thread[slealThCount];
List <int> global = new List <int>(elemCount + 1);
Action mainAction = () =>
{
List <int> data = new List <int>(elemCount);
Random rnd = new Random(Environment.TickCount + Interlocked.Increment(ref atomicRandom) * slealThCount);
while (Volatile.Read(ref trackElemCount) >= 0)
{
int addCount = fillFactor;
if (rnd != null)
{
addCount = rnd.Next(fillFactor);
}
for (int i = 0; i < addCount; i++)
{
int item = --trackElemCount;
if (item < 0)
{
break;
}
if (!q.TryAddLocal(new TestThreadPoolItem(item)))
{
++trackElemCount;
break;
}
}
int removeCount = rnd.Next(fillFactor);
for (int i = 0; i < removeCount; i++)
{
ThreadPoolWorkItem item = null;
if (!q.TryTakeLocal(out item))
{
break;
}
data.Add((TestThreadPoolItem)item);
}
}
Interlocked.Increment(ref addFinished);
ThreadPoolWorkItem finalItem = null;
while (q.TryTakeLocal(out finalItem))
{
data.Add((TestThreadPoolItem)finalItem);
}
lock (global)
global.AddRange(data);
};
Action stealAction = () =>
{
Random rnd = new Random(Environment.TickCount + Interlocked.Increment(ref atomicRandom) * slealThCount);
List <int> data = new List <int>();
while (Volatile.Read(ref addFinished) < 1 && Volatile.Read(ref trackElemCount) > elemCount / 1000)
{
ThreadPoolWorkItem tmp;
if (q.TrySteal(out tmp))
{
data.Add((TestThreadPoolItem)tmp);
}
int sleepTime = rnd.Next(5) - 3;
if (sleepTime > 0)
{
Thread.Sleep(sleepTime);
}
}
lock (global)
global.AddRange(data);
};
mainThread = new Thread(new ThreadStart(mainAction));
for (int i = 0; i < stealThreads.Length; i++)
{
stealThreads[i] = new Thread(new ThreadStart(stealAction));
}
mainThread.Start();
for (int i = 0; i < stealThreads.Length; i++)
{
stealThreads[i].Start();
}
mainThread.Join();
for (int i = 0; i < stealThreads.Length; i++)
{
stealThreads[i].Join();
}
Assert.AreEqual(elemCount, global.Count, "Incorrect element count");
global.Sort();
for (int i = 0; i < elemCount; i++)
{
Assert.AreEqual(i, global[i], "Incorrect data");
}
}
private static bool TestLocalThreadQueuePrimaryScenario(ThreadPoolLocalQueue q, int elemCount, int slealThCount, int fillFactor, bool useRandom)
{
int trackElemCount = elemCount;
int addFinished = 0;
int atomicRandom = 0;
Thread mainThread = null;
Thread[] stealThreads = new Thread[slealThCount];
List <int> global = new List <int>(elemCount);
Action mainAction = () =>
{
List <int> data = new List <int>(elemCount);
Random rnd = null;
if (useRandom)
{
rnd = new Random(Environment.TickCount + Interlocked.Increment(ref atomicRandom) * slealThCount);
}
while (Volatile.Read(ref trackElemCount) >= 0)
{
int addCount = fillFactor;
if (rnd != null)
{
addCount = rnd.Next(fillFactor);
}
for (int i = 0; i < addCount; i++)
{
int item = --trackElemCount;
if (item < 0)
{
break;
}
if (!q.TryAddLocal(new TestThreadPoolItem(item)))
{
++trackElemCount;
break;
}
}
int removeCount = fillFactor;
if (rnd != null)
{
removeCount = rnd.Next(fillFactor);
}
for (int i = 0; i < removeCount; i++)
{
ThreadPoolWorkItem item = null;
if (!q.TryTakeLocal(out item))
{
break;
}
data.Add((TestThreadPoolItem)item);
}
}
Interlocked.Increment(ref addFinished);
ThreadPoolWorkItem finalItem = null;
while (q.TryTakeLocal(out finalItem))
{
data.Add((TestThreadPoolItem)finalItem);
}
lock (global)
global.AddRange(data);
};
Action stealAction = () =>
{
Random rnd = null;
if (useRandom)
{
rnd = new Random(Environment.TickCount + Interlocked.Increment(ref atomicRandom) * slealThCount);
}
List <int> data = new List <int>();
while (Volatile.Read(ref addFinished) < 1 && Volatile.Read(ref trackElemCount) > elemCount / 1000)
{
ThreadPoolWorkItem tmp;
if (q.TrySteal(out tmp))
{
data.Add((TestThreadPoolItem)tmp);
}
int sleepTime = Volatile.Read(ref trackElemCount) % 2;
if (rnd != null)
{
sleepTime = rnd.Next(2);
}
if (sleepTime > 0)
{
Thread.Sleep(sleepTime);
}
}
lock (global)
global.AddRange(data);
};
mainThread = new Thread(new ThreadStart(mainAction));
for (int i = 0; i < stealThreads.Length; i++)
{
stealThreads[i] = new Thread(new ThreadStart(stealAction));
}
Stopwatch sw = Stopwatch.StartNew();
mainThread.Start();
for (int i = 0; i < stealThreads.Length; i++)
{
stealThreads[i].Start();
}
mainThread.Join();
for (int i = 0; i < stealThreads.Length; i++)
{
stealThreads[i].Join();
}
sw.Stop();
bool result = true;
global.Sort();
if (global.Count != elemCount)
{
result = false;
Console.WriteLine("Incorrect element count");
}
HashSet <int> set = new HashSet <int>(global);
if (set.Count != global.Count)
{
result = false;
Console.WriteLine("Incorrect distinct element count");
}
for (int i = 0; i < Math.Min(elemCount, global.Count); i++)
{
if (global[i] != i)
{
result = false;
Console.WriteLine("Incorrect data");
break;
}
}
Console.WriteLine("PrimaryScenario " + q.GetType().Name + ". Element count = " + elemCount.ToString() + ", Time = " + sw.ElapsedMilliseconds.ToString() + "ms");
Console.WriteLine();
return(result);
}