Problem In Threading

Hi
Can any one tell me i am beginner to Threading so when ever i am running this program it show some time Firlsy (functon 1 Execution) and some time show Firstly (Function 2 Execution) , now my question is that how much time each thread is taking for execution and what is the by default time of each thread ....?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
namespace Threading_In_C_Sharp
{
class Program
{
static void WriteY()
{
for (int i = 0; i < 1000; i++) Console.Write("Y");
}

static void Main(string[] args)
{

Thread obj1 = new Thread(function1);
obj1.Start();
Thread obj2 = new Thread(funciton2);
obj2.Start();

}
public static void function1()
{
for (int i = 1; i <= 10; i++)
{
Console.WriteLine("Function 1 Execution" + i.ToString());

}
}
public static void funciton2()
{
for (int i = 1; i <= 10; i++)
{
Console.WriteLine("Function 2 Execution" + i.ToString());

}
}
}
}

Is your computer single core or multi-core?

On a single processor or core machine, Windows creates the illusion of concurrent processing by assigning a 'time slice' to each thread. A time slice is thought to be about 20 ms but, in practice, it could be less than this as it may be pre-empted by higher priority system threads running in the background.

On a multi-processor or multi-core machine, true concurrency is possible though even then threads running on different cores still need to compete for console output which introduces unpredictability.

So, whatever kind of machine you have, the output of programs such as yours is generally unpredictable which is one of the reasons why multi-threaded programming can be so difficult.

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Vulpes14y ago
Is your computer single core or multi-core?

On a single processor or core machine, Windows creates the illusion of concurrent processing by assigning a 'time slice' to each thread. A time slice is thought to be about 20 ms but, in practice, it could be less than this as it may be pre-empted by higher priority system threads running in the background.

On a multi-processor or multi-core machine, true concurrency is possible though even then threads running on different cores still need to compete for console output which introduces unpredictability.

So, whatever kind of machine you have, the output of programs such as yours is generally unpredictable which is one of the reasons why multi-threaded programming can be so difficult.
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