private static void Main()
{
var coreCount = Environment.ProcessorCount;
Console.WriteLine($"Process/core count = {coreCount}");
var data = GetData();
var sw = Stopwatch.StartNew();
var wholeArray = new ArrayProcessor(data, 0, data.Length - 1);
wholeArray.ComputeSum();
sw.Stop();
Console.WriteLine($"1 thread computed {wholeArray.Sum:n0} in {sw.ElapsedMilliseconds:n0} ms");
}
private static void Main()
{
var coreCount = Environment.ProcessorCount;
Console.WriteLine($"Process/core count = {coreCount}");
var data = GetData();
var sw = Stopwatch.StartNew();
var slices = new ArrayProcessor[coreCount];
var threads = new Thread[coreCount];
var indexesPerThread = data.Length / coreCount;
var leftOverIndexes = data.Length % coreCount;
for (var n = 0; n < coreCount; n++)
{
var firstIndex = (n * indexesPerThread);
var lastIndex = firstIndex + indexesPerThread - 1;
if (n == coreCount - 1)
{
lastIndex += leftOverIndexes;
}
var slice = new ArrayProcessor(data, firstIndex, lastIndex);
slices[n] = slice;
threads[n] = new Thread(slice.ComputeSum);
threads[n].Start();
}
double sum = 0;
for (var n = 0; n < coreCount; n++)
{
threads[n].Join();
sum += slices[n].Sum;
}
sw.Stop();
Console.WriteLine($"{coreCount} threads computed {sum:n0} in {sw.ElapsedMilliseconds:n0} ms");
}
