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ave_var.c
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ave_var.c
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#include <stdio.h>
#include "mpi.h"
#include <math.h>
int main(int argc, char** argv)
{
int cpu_rank; //name of the cpu
int n; //number of X numbers
int p; //number of cpu's
int i;
int num;
int source; //indexes for mass communication between cpus
int target;
int tag1=50; //tag for sending n
int tag2=60; //tag for sending numbers of X
int tag3=70; //tag for sending local_sum's
int tag4=80; //tag for sending average m
int tag5=90; //tag for sending local_var's
int tag6=100; //tag for sending local_max's
int tag7=110; //tag for sending local_min's
int X[100]; //buffer for the all of the X records
int X_local[100]; //local buffer for the X records of each cpu
MPI_Status status;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &cpu_rank);
MPI_Comm_size(MPI_COMM_WORLD, &p);
////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////AVERAGE///////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////
int local_sum=0;
int sum=0;
float m=0; //average of all X numbers
if (cpu_rank == 0) //if you are the cpu coordinator
{
printf("Give me the size of input:\n");
scanf("%d", &n);
printf("Type the elements of X array:\n", n);
for (i=0; i<n; i++)
scanf("%d", &X[i]);
for (target = 1; target < p; target++) //send to all the other cpu's
MPI_Send(&n, 1, MPI_INT, target, tag1, MPI_COMM_WORLD); //the total number of X numbers
num = n/p;
i=num;
for (target = 1; target < p; target++) //send to all the other cpu's
{ //the X numbers that they will work with
MPI_Send(&X[i], num, MPI_INT, target, tag2, MPI_COMM_WORLD);
i+=num;
}
for (i=0; i<num; i++)
X_local[i]=X[i];
}
else //if you are a cpu worker
{
MPI_Recv(&n, 1, MPI_INT, 0, tag1, MPI_COMM_WORLD, &status); //receive the total number of X numbers
num = n/p;
MPI_Recv(&X_local[0], num, MPI_INT, 0, tag2, MPI_COMM_WORLD, &status); //receive the X numbers that you will work with
}
/////////////////////////////////////////////////////////
///////ALL CPU'S WILL EXECUTE THIS PART//////////////////
local_sum=0;
for(i=0; i<num; i++)
local_sum+=X_local[i];
/////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////
if (cpu_rank != 0) //if you are a cpu worker
{
MPI_Send(&local_sum, 1, MPI_INT, 0, tag3, MPI_COMM_WORLD); //send back the sum of the numbers you worked with
}
else //if you are the cpu coordinator
{
sum = local_sum;
for (source = 1; source < p; source++) //receive each sum from all the workers and add them together
{
MPI_Recv(&local_sum, 1, MPI_INT, source, tag3, MPI_COMM_WORLD, &status);
sum = sum + local_sum;
}
m=(float)sum/n;
printf("\na.\n Average: %.3f\n", m);
}
////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////VARIANCE//////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////
float each_var=0; //(x[i]-m)^2
float local_var=0; //(x[i]-m)^2+(x[i+1]-m)^2+.....
float var=0;
float total_var=0;
if(cpu_rank == 0)
{
for (target = 1; target < p; target++)
MPI_Send(&m, 1, MPI_FLOAT, target, tag4, MPI_COMM_WORLD);
}
else
{
MPI_Recv(&m, 1, MPI_FLOAT, 0, tag4, MPI_COMM_WORLD, &status);
}
/////////////////////////////////////////////////////////
///////ALL CPU'S WILL EXECUTE THIS PART///////
for(i=0; i<num; i++)
{
each_var=pow((X_local[i]-m),2);
local_var=local_var+each_var;
}
/////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////
if (cpu_rank != 0) //if you are a cpu worker
{
MPI_Send(&local_var, 1, MPI_INT, 0, tag5, MPI_COMM_WORLD); //send back the var of the numbers you worked with
}
else //if you are the cpu coordinator
{
var = local_var;
for (source = 1; source < p; source++) //receive each var from all the workers and add them together
{
MPI_Recv(&local_var, 1, MPI_INT, source, tag5, MPI_COMM_WORLD, &status);
var=var+local_var;
}
total_var=(float)var/n;
printf("\nb.\n Variance: %.3f\n", total_var);
}
/////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////d[i] ARRAY/////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////
int max_list[p]; //array which each record is the max record from all local records of all cpu's
int min_list[p]; //array which each record is the min record from all local records of all cpu's
int local_max;
int local_min;
int total_max;
int total_min;
int d[n]; //d[i]=((X[i]-min(X))/(max(X)-min(X))*100
/////////////////////////////////////////////////////////
///////ALL CPU'S WILL EXECUTE THIS PART//////////////////
local_max=X_local[0];
for(i=0; i<num; i++)
{
if(X_local[i]>local_max)
local_max=X_local[i];
}
local_min=X_local[0];
for(i=0; i<num; i++)
{
if(X_local[i]<local_min)
local_min=X_local[i];
}
/////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////
if(cpu_rank != 0) //if you are a cpu worker
{
MPI_Send(&local_max, 1, MPI_INT, 0, tag6, MPI_COMM_WORLD); //send back your local_max and local_min
MPI_Send(&local_min, 1, MPI_INT, 0, tag7, MPI_COMM_WORLD);
}
else //if you are the cpu coordinator
{
for (source = 1; source < p; source++) //receive each local_max from all the workers and put them to their list
{
MPI_Recv(&local_max, 1, MPI_INT, source, tag6, MPI_COMM_WORLD, &status);
max_list[source-1]=local_max;
MPI_Recv(&local_min, 1, MPI_INT, source, tag7, MPI_COMM_WORLD, &status);
min_list[source-1]=local_min;
}
max_list[p-1]=local_max; //add the coordinator's local_max and local_min at the end of each list
min_list[p-1]=local_min;
total_max=max_list[0]; //find the total max of the entire array
for(i=0; i<p; i++)
{
if(max_list[i]>total_max)
total_max=max_list[i];
}
total_min=min_list[0]; //find the total min of the entire array
for(i=0; i<p; i++)
{
if(min_list[i]<total_min)
total_min=min_list[i];
}
for(i=0; i<n; i++)
d[i]=((X[i]-total_min)/(total_max-total_min))*100;
printf("\nc.\n New Vector d[]: \n");
for(i=0; i<n; i++)
printf("\td[%d]=%d\n",i, d[i]);
}
MPI_Finalize();
return 0;
}