Hands-On Parallel Programming with C# 8 and .NET Core 3

Sample program using MPI

The following is a simple HelloWorld program that we can run using MPI. The program prints the processor number that the code is being executed on after a delay of two seconds. The same code can be run on multiple processors (we are able to specify the processor count).

Let's create a new console application project in Visual Studio and write the following code in the Program.cs file:

[DllImport("Kernel32.dll"), SuppressUnmanagedCodeSecurity]public static extern int GetCurrentProcessorNumber();static void Main(string[] args){    Thread.Sleep(2000);    Console.WriteLine($"Hello {GetCurrentProcessorNumber()} Id");}

GetCurrentProcessorNumber() is a utility function that gives the processor number of where our code is being ...