public static int BestTaskCount(int arrayCount, int minTaskCount, int maxTaskCount)
{
int[] buffer = Utils.GenerateIntArray(arrayCount, 15);
long elapsed = 0;
long minElapsed = long.MaxValue;
int bestTaskCount = -1;
for (int i = minTaskCount; i <= maxTaskCount; i++)
{
Stopwatch watch = Stopwatch.StartNew();
//-------------------------
int s = ThreadArray.Sum(buffer, i);
//-------------------------
watch.Stop();
elapsed = watch.ElapsedMilliseconds;
Console.WriteLine($"TaskCount = {i}: Sum of int[{arrayCount}] = {s}, elapsed time is {elapsed} ms.");
if (elapsed < minElapsed)
{
minElapsed = elapsed;
bestTaskCount = i;
}
}
return(bestTaskCount);
}
public void Sum_CompareThreadAndUsualSumOnAllProc_Equal()
{
int[] arr = Utils.GenerateIntArray(100000, 29);
int sampleSum = ThreadArray.Sum(arr, 0, arr.Length);
int testedSum = ThreadArray.Sum(arr, Environment.ProcessorCount);
Assert.Equal(sampleSum, testedSum);
}
public void Sum_CompareThreadAndUsualSumOn3Proc_Equal()
{
int[] arr = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
int sampleSum = ThreadArray.Sum(arr, 0, arr.Length);
int testedsum = ThreadArray.Sum(arr, 3);
Assert.Equal(sampleSum, testedsum);
}