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[book_gpu.git] / BookGPU / Chapters / chapter2 / ex2.cu

diff --git a/BookGPU/Chapters/chapter2/ex2.cu b/BookGPU/Chapters/chapter2/ex2.cu
index b27d619dd19b41e679df5fe9477a08bcbea22901..62931cdce0dc439a8bca3de46d8926d21723ce5a 100644 (file)
--- a/BookGPU/Chapters/chapter2/ex2.cu
+++ b/BookGPU/Chapters/chapter2/ex2.cu
@@ -6,7 +6,6 @@
 #include "cutil_inline.h"
 #include <cublas_v2.h>
 
 #include "cutil_inline.h"
 #include <cublas_v2.h>
 

-

 const int nbThreadsPerBloc=256;
 
 __global__ 
 const int nbThreadsPerBloc=256;
 
 __global__ 


@@ -28,19 +27,15 @@ void inverse(int size, double *d_x) {
 
 int main( int argc, char** argv) 
 {
 
 int main( int argc, char** argv) 
 {

-

        if(argc!=2) { 
                printf("usage: ex2 nb_components\n");
                exit(0);
        }
 
        int size=atoi(argv[1]);
        if(argc!=2) { 
                printf("usage: ex2 nb_components\n");
                exit(0);
        }
 
        int size=atoi(argv[1]);

-

        cublasStatus_t stat;
        cublasHandle_t handle; 
        stat=cublasCreate(&handle);
        cublasStatus_t stat;
        cublasHandle_t handle; 
        stat=cublasCreate(&handle);

-
-

        int i;
        double *h_arrayA=(double*)malloc(size*sizeof(double));
        double *h_arrayB=(double*)malloc(size*sizeof(double));
        int i;
        double *h_arrayA=(double*)malloc(size*sizeof(double));
        double *h_arrayB=(double*)malloc(size*sizeof(double));


@@ -48,7 +43,6 @@ int main( int argc, char** argv)
        double *h_arrayCgpu=(double*)malloc(size*sizeof(double));
        double *d_arrayA, *d_arrayB, *d_arrayC;
 
        double *h_arrayCgpu=(double*)malloc(size*sizeof(double));
        double *d_arrayA, *d_arrayB, *d_arrayC;
 

-

        cudaMalloc((void**)&d_arrayA,size*sizeof(double));
        cudaMalloc((void**)&d_arrayB,size*sizeof(double));
        cudaMalloc((void**)&d_arrayC,size*sizeof(double));
        cudaMalloc((void**)&d_arrayA,size*sizeof(double));
        cudaMalloc((void**)&d_arrayB,size*sizeof(double));
        cudaMalloc((void**)&d_arrayC,size*sizeof(double));


@@ -58,10 +52,9 @@ int main( int argc, char** argv)
                h_arrayB[i]=2*(i+1);
        }
 
                h_arrayB[i]=2*(i+1);
        }
 

-

        unsigned int timer_cpu = 0;
        cutilCheckError(cutCreateTimer(&timer_cpu));
        unsigned int timer_cpu = 0;
        cutilCheckError(cutCreateTimer(&timer_cpu));

-  cutilCheckError(cutStartTimer(timer_cpu));
+       cutilCheckError(cutStartTimer(timer_cpu));

        double dot=0;
        for(i=0;i<size;i++) {
                h_arrayC[i]=h_arrayA[i]+h_arrayB[i];
        double dot=0;
        for(i=0;i<size;i++) {
                h_arrayC[i]=h_arrayA[i]+h_arrayB[i];


@@ -71,10 +64,9 @@ int main( int argc, char** argv)
        printf("CPU processing time : %f (ms) \n", cutGetTimerValue(timer_cpu));
        cutDeleteTimer(timer_cpu);
 
        printf("CPU processing time : %f (ms) \n", cutGetTimerValue(timer_cpu));
        cutDeleteTimer(timer_cpu);
 

-

        unsigned int timer_gpu = 0;
        cutilCheckError(cutCreateTimer(&timer_gpu));
        unsigned int timer_gpu = 0;
        cutilCheckError(cutCreateTimer(&timer_gpu));

-  cutilCheckError(cutStartTimer(timer_gpu));
+       cutilCheckError(cutStartTimer(timer_gpu));

        stat = cublasSetVector(size,sizeof(double),h_arrayA,1,d_arrayA,1);
        stat = cublasSetVector(size,sizeof(double),h_arrayB,1,d_arrayB,1);
        int nbBlocs=(size+nbThreadsPerBloc-1)/nbThreadsPerBloc;
        stat = cublasSetVector(size,sizeof(double),h_arrayA,1,d_arrayA,1);
        stat = cublasSetVector(size,sizeof(double),h_arrayB,1,d_arrayB,1);
        int nbBlocs=(size+nbThreadsPerBloc-1)/nbThreadsPerBloc;


@@ -85,7 +77,6 @@ int main( int argc, char** argv)
        double dot_gpu=0;
        stat = cublasDdot(handle,size,d_arrayC,1,d_arrayA,1,&dot_gpu);
 
        double dot_gpu=0;
        stat = cublasDdot(handle,size,d_arrayC,1,d_arrayA,1,&dot_gpu);
 

-

        cutilCheckError(cutStopTimer(timer_gpu));
        printf("GPU processing time : %f (ms) \n", cutGetTimerValue(timer_gpu));
        cutDeleteTimer(timer_gpu);
        cutilCheckError(cutStopTimer(timer_gpu));
        printf("GPU processing time : %f (ms) \n", cutGetTimerValue(timer_gpu));
        cutDeleteTimer(timer_gpu);


@@ -98,8 +89,6 @@ int main( int argc, char** argv)
        free(h_arrayB);
        free(h_arrayC);
        free(h_arrayCgpu);
        free(h_arrayB);
        free(h_arrayC);
        free(h_arrayCgpu);

-

        cublasDestroy(handle);
        return 0;
        cublasDestroy(handle);
        return 0;

-

 }
 }