passing a scalar to a cublas_v2 rise a segfault

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello,

I’m using Cubals with CUDA 4.0 on Tesla M2070 GPU.

I got q segfault every time I passe a scalar by ref to a Cublas kernel

...

  cublasHandle_t handle;

  cudaMalloc((void**)&dot_GPU,  sizeof(double));

  cudaMemset(dot_GPU, 0, sizeof(double));

  cudaStreamCreate(&stream_cublas);

  cublasCreate(&handle);

  cublasSetStream(handle, stream_cublas);

  /* This one is OK */

  cublasDdot(handle,n,_vect,1,_vect,1,&dot_RAM);

/* And this one is KO :) */

  cublasDdot(handle,n,_vect,1,_vect,1,dot_GPU);

This is a example of a dot kernel, by i get the same thing with scal and axpy.

Any ideas??

Stole