X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/book_gpu.git/blobdiff_plain/fc4670d0de6814f682df0ce247905cba40b9d547..1302ee8d8311914e1b20fdcbf3bc52a8bb94a6a8:/BookGPU/Chapters/chapter2/ex2.cu

diff --git a/BookGPU/Chapters/chapter2/ex2.cu b/BookGPU/Chapters/chapter2/ex2.cu
index 762654c..62931cd 100644
--- a/BookGPU/Chapters/chapter2/ex2.cu
+++ b/BookGPU/Chapters/chapter2/ex2.cu
@@ -6,7 +6,6 @@
 #include "cutil_inline.h"
 #include <cublas_v2.h>
 
-
 const int nbThreadsPerBloc=256;
 
 __global__ 
@@ -28,19 +27,15 @@ void inverse(int size, double *d_x) {
 
 int main( int argc, char** argv) 
 {
-
 	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);
-
-
 	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;
 
-
 	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);
 	}
 
-
 	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];
@@ -71,10 +64,9 @@ int main( int argc, char** argv)
 	printf("CPU processing time : %f (ms) \n", cutGetTimerValue(timer_cpu));
 	cutDeleteTimer(timer_cpu);
 
-
 	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;
@@ -85,16 +77,11 @@ int main( int argc, char** argv)
 	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);
-	
-	cublasGetVector(size,sizeof(double),d_arrayC,1,h_arrayCgpu,1);
-
 	printf("cpu dot %e --- gpu dot %e\n",dot,dot_gpu);
 
-
 	cudaFree(d_arrayA);
 	cudaFree(d_arrayB);
 	cudaFree(d_arrayC);
@@ -102,8 +89,6 @@ int main( int argc, char** argv)
 	free(h_arrayB);
 	free(h_arrayC);
 	free(h_arrayCgpu);
-
 	cublasDestroy(handle);
 	return 0;
-
 }