Z7-openACC
Table of Contents
Setup
Installation
apt-get install libopenmpi-dev
apt-get install openmpi-bin
Compilation & Running OpenMP
gcc -o name name.c -fopenmp
./name
Compilation & Running MPI
mpicc filename.c -o filename
mpirun -np 1 ./filename # -lm
Compilation & Running OpenACC
gcc -o izvrsna_dat izvorna_dat.c -fopenacc
./izvrsna_dat
Primeri
ptraliasing.c
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void assign(int *a, int *b, int size) {
#pragma acc kernels
{
for (int i = 0; i < size - 1; i++)
a[i] = b[i + 1];
}
}
int main() {
return 0;
}
ptraliasing.c
parallel.c
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#include <stdio.h>
#include <stdlib.h>
#ifdef _OPENACC
#include <openacc.h>
#endif
int main() {
float *values = (float *) malloc(sizeof(float) * size);
#pragma acc parallel
for (int i = 0; i < 1024; i++)
values[i] = 1.f;
free(values);
return 0;
}
parallel.c
parallelloop.c
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#include <stdlib.h>
#include <openacc.h>
#define N 1024
#define M 1024
int main() {
float *A = (float *) malloc(N * M * sizeof(float));
#pragma acc parallel loop gang
for (int i=0; i<N; i++)
#pragma acc loop vector
for (int j=0; j<M; j++)
A[i * N + j] = 1.f;
free(A);
return 0;
}
parallelloop.c
data.c
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#include <stdlib.h>
#define N 1024
int main() {
float *x = (float *) malloc(sizeof(float) * N);
float *y = (float *) malloc(sizeof(float) * N);
#pragma acc data
{
#pragma acc parallel loop
for (int i=0; i<N; i++) {
y[i] = 0.0f;
x[i] = (float)(i+1);
}
#pragma acc parallel loop
for (int i=0; i<N; i++) {
y[i] = 2.0f * x[i] + y[i];
}
}
free(x); free(y);
return 0;
}
data.c
matrixop.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define MSIZE 64
//#define PRINT
int main(int argc, char *argv[]) {
int *randomMatrix = (int *) calloc(MSIZE * MSIZE * sizeof(int));
clock_t t1, t2;
t1 = clock();
int i, j;
#pragma acc kernels
{
for(i = 0; i < MSIZE; i++) {
for(j = 0; j < MSIZE; j++) {
randomMatrix[j * MSIZE + i] = randomMatrix[j * MSIZE + i] + 2;
}
}
}
t2 = clock();
#ifdef PRINT
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
printf("matrica[%d,%d] = %d\n", i, j, randomMatrix[i * MSIZE + J);
}
}
#endif
free(randomMatrix);
printf("Elapsed Time: %f ms\n",((float)(t2 - t1) / 1000000.0F ) * 1000);
return 0;
}
matrixop.c
matrixop-coalesced.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define MSIZE 64
//#define PRINT
int main(int argc, char *argv[]) {
int *randomMatrix = (int *) calloc(MSIZE * MSIZE * sizeof(int));
clock_t t1, t2;
t1 = clock();
int i, j;
#pragma acc kernels
{
for(i = 0; i < MSIZE; i++)
for(j = 0; j < MSIZE; j++)
randomMatrix[i * MSIZE + j] = randomMatrix[i * MSIZE + j] + 2;
}
t2 = clock();
#ifdef PRINT
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
printf("matrica[%d,%d] = %d\n", i, j, randomMatrix[i * MSIZE + J);
}
}
#endif
free(randomMatrix);
printf("Elapsed Time: %f ms\n",((float)(t2 - t1) / 1000000.0F ) * 1000);
return 0;
}
matrixop-coalesced.c
matrixinit.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <openacc.h>
#define MSIZE 64
//#define PRINT
int main(int argc, char *argv[]) {
int *randomMatrix = (int *) malloc(MSIZE * MSIZE * sizeof(int));
clock_t t1, t2;
t1 = clock();
#pragma acc kernels
{
for(int i = 0; i < MSIZE; i++) {
for(int j = 0; j < MSIZE; j++) {
randomMatrix[i * MSIZE + j] = (i + j) % 2;
}
}
}
t2 = clock();
#ifdef PRINT
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
printf("matrica[%d,%d] = %d\n", i, j, randomMatrix[i * MSIZE + J);
}
}
#endif
free(randomMatrix);
printf("Elapsed Time: %f ms\n",((float)(t2 - t1) / 1000000.0F ) * 1000);
}
matrixinit.c
matrixinitdiv.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <openacc.h>
#define MSIZE 64
//#define PRINT
int main(int argc, char *argv[]) {
int *randomMatrix = (int *) malloc(MSIZE * MSIZE * sizeof(int));
clock_t t1, t2;
t1 = clock();
#pragma acc kernels
{
for(int i = 0; i < MSIZE; i++) {
for(int j = 0; j < MSIZE; j++) {
if ((i + j) % 2) {
randomMatrix[i * MSIZE + j] = 1;
} else {
randomMatrix[i * MSIZE + j] = 0;
}
}
}
}
t2 = clock();
#ifdef PRINT
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
printf("matrica[%d,%d] = %d\n", i, j, randomMatrix[i * MSIZE + J);
}
}
#endif
free(randomMatrix);
printf("Elapsed Time: %f ms\n",((float)(t2 - t1) / 1000000.0F ) * 1000);
return 0;
}
matrixinitdiv.c
