Synergy User Manual and Tutorial. - THE CORE MEMORY

Synergy User Manual and Tutorial
Getting Workers to Work
Sum of First N Integers
The calculation of the sum of the first n integers or ∑i
can be easily calculated in a
regular computer program. An ANSI C program would be:
#include
#define N 6
int main{
int i;
int sum = 0;
}
for(i=N; i>=N; i--)
sum+=i;
printf(“The sum of the first %d integers is %d\n”, N, sum);
return 0;
This problem can easily be performed in a parallel program by having the master
(tupleSum1Master.c) put each integer into the problem tuple space. The workers
(tupleSum1Workers.c) take the integers out of the problem tuple space, tally their
respective sub sums and put the sub sums into the result tuple space. The master gets the
sub sums from the result tuple space and produces the desires sum. This application is
located in the example04 directory.
The following is the tuple space sum of n integers master program:
n
i=
1
#include
#include
main(){
int P;
// Number of processors
int i;
// Counter index
int status;
// Return status for tuple operations
int res;
// Result tuple space identifier
int tsd;
// Problem tuple space identifier
int maxNum = 6;
// MAX of n for sum of 1..n
int sendNum = 0;
// Number sent to problem ts
int *sendPtr = &sendNum; // Pointer to sendNum
int recdSum = 0;
// Subsum received from result ts
int *recdPtr = &recdSum; // Pointer to recdSum
int calcSum = 0;
// Calculated sum
int sumTotal = 0;
// Sum total of all subsums
int tplength;
// Length of ts entry
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