This post talks about MPI_Comm_size function in MPI. MPI_Comm_size is a function in the Message Passing Interface (MPI) used to determine the total number of processes in a communicator. Syntax for MPI_Comm_size int MPI_Comm_size( MPI_Comm comm, int *size ) Input…

This post talks about MPI_Init function in MPI. MPI_Init function is called at the beginning of an MPI program to set up the communication environment for all processes in the specified communicator. Without this function, none of the MPI operations…

This post talks about Reduction operation in MPI using MPI_Allreduce. MPI_Allreduce is a collective communication operation in the Message Passing Interface (MPI) that combines values from all processes in a communicator and distributes the result back to all processes. Syntax…

This post talks about MPI_Allgather function in MPI. MPI_Allgather is a collective communication operation in the Message Passing Interface (MPI) that allows all processes in a communicator to gather data from every other process. Unlike MPI_Gather, where only the root…

This post talks about Reduction operation in MPI using MPI_Gather. MPI_Gather is a collective operation in the Message Passing Interface (MPI) used to collect data from multiple processes and combine it into a single process. Syntax for MPI_Gather int MPI_Gather(const…