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C#/.NET - max and min number of threads in thread pool

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Created by:

Root-ssh

178180

To set up max and min number of threads in ThreadPool class, ThreadPool.SetMinThreads and ThreadPool.SetMaxThreads methods could be useful.

1. Max and min number of threads example

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using System;
using System.Threading;
​
namespace Test
{
    public class Program
    {
        static void Main(string[] args)
        {
            int tasksCount = 5;
            int iterationsCount = 5;
​
            WaitCallback callback = (object state) =>
            {
                int taskId = (int)state;
​
                for (int i = 0; i < iterationsCount; ++i)
                {
                    int iterationId = i + 1;
​
                    Console.WriteLine("Task " + taskId + "/" + tasksCount 
                        + ": Iteration " + iterationId + "/" + iterationsCount);
                }
            };
​
            ThreadPool.SetMinThreads(1, 1);
            ThreadPool.SetMaxThreads(2, 2);
​
            for (int i = 0; i < tasksCount; ++i)
            {
                int taskId = i + 1;
​
                ThreadPool.QueueUserWorkItem(callback, taskId);
            }
​
            Thread.Sleep(1000);
        }
    }
}

Output:

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Task 1/5: Iteration 1/5
Task 2/5: Iteration 1/5
Task 2/5: Iteration 2/5
Task 2/5: Iteration 3/5
Task 1/5: Iteration 2/5
Task 1/5: Iteration 3/5
Task 1/5: Iteration 4/5
Task 1/5: Iteration 5/5
Task 2/5: Iteration 4/5
Task 2/5: Iteration 5/5
Task 3/5: Iteration 1/5
Task 3/5: Iteration 2/5
Task 3/5: Iteration 3/5
Task 3/5: Iteration 4/5
Task 3/5: Iteration 5/5
Task 4/5: Iteration 1/5
Task 4/5: Iteration 2/5
Task 4/5: Iteration 3/5
Task 4/5: Iteration 4/5
Task 4/5: Iteration 5/5
Task 5/5: Iteration 1/5
Task 5/5: Iteration 2/5
Task 5/5: Iteration 3/5
Task 5/5: Iteration 4/5
Task 5/5: Iteration 5/5