python - strange values when get the variable from the host -

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i have kernel below:

# compile device.cu     mod = sourcemodule('''   #include<stdio.h> __global__ void test(unsigned int* tab, unsigned int compteurinit) {     unsigned int gid = threadidx.x + blockdim.x * (threadidx.y + blockdim.y * (blockidx.x + blockidx.y * griddim.x));     tab[gid] = compteurinit;     printf("%d ",tab[gid]); }''',             nvcc='/opt/cuda65/bin/nvcc',            )

and here host program

kern = mod.get_function("test")  xgrid = 256  ygrid = 1  xblock = 256  yblock = 1     etat=np.zeros(xblock * yblock * xgrid * ygrid,dtype=np.uint) etat_gpu= gpuarray.to_gpu(etat)  kern(etat_gpu,np.uint(10),block=(xblock,yblock,1),grid=(xgrid,ygrid,1))  print etat_gpu.get()

when print result have got strange values whereas

like this:

[42949672970 42949672970 42949672970 ...,           0           0            0]

but when check printed value in kernel seems good


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