Using Multi-core (-thread) processor for FOR loop

Question

I have a simple loop for:

for (int i = 1; i <= 8; i++)
{
    DoSomething(i);
}
int nopt = 8; //number of processor threads

I would like to do DoSomething(1) in processor thread 1,
DoSomething(2) in thread 2
...
DoSomething(8) in thread 8.

Is it possible? If yes than how?

Thanks for answers.

Answer 1

You can try Parallel.For:

  int nopt = 8;

  ParallelOptions po = new ParallelOptions() {
    MaxDegreeOfParallelism = nopt,
  };

  // 9 is exclusive when you want i <= 8
  Parallel.For(1, 9, po, i => DoSomething(i));

PLinq (Parallel Linq) is an alternative:

  Enumerable
    .Range(1, 8)
    .AsParallel()
    .WithDegreeOfParallelism(nopt)
    .ForAll(i => DoSomething(i));