unsigned long = 32bits in cuda.
You probably want unsigned long long = 64bits, which aligns with np.uint64.
On 13 June 2017 at 09:02, Rana, Sanjay <sanjay.r...@rpa.gsi.gov.uk> wrote:
> Hi Everyone,
>
>
>
> I am sure it’s something quite trivial that I am doing incorrectly but I
> can’t seem to be able to find it.
>
>
>
> The following simple pycuda code is printing some random values from the
> kernel for the long integer array.
>
>
>
> Please ignore the arbitrary initialisations in places as this is just for
> the test.
>
>
>
> --code--
>
> import numpy as np
>
> import pycuda.driver as drv
>
> import pycuda.autoinit
>
> from pycuda.compiler import SourceModule
>
>
>
> _stats_kernel_source = """
>
> #include <stdio.h>
>
>
>
> __global__ void stats_kernel(unsigned long *CROMEID, int numCROMECELLS)
>
> {
>
> // calculate pixel idx
>
> int x = blockIdx.x * blockDim.x + threadIdx.x;
>
> if (x < numCROMECELLS)
>
> {
>
> if (x < 1)
>
> {
>
> unsigned long cid = CROMEID[x];
>
> printf("Value in Kernel at %d is %lu\\n",x,cid);
>
> }
>
> }
>
> }
>
> """
>
>
>
> zonal_stats_cuda = SourceModule(_stats_kernel_source)
>
> zonal_stats_cuda_func = zonal_stats_cuda.get_function("stats_kernel")
>
>
>
> numCROMECELLS = np.uint32(91480)
>
> cromeCELLS = np.zeros((numCROMECELLS,), dtype=np.uint64)
>
> long_cromeid = np.uint64(1091194009352)
>
> cromeCELLS[0] = long_cromeid
>
> long_cromeid = np.uint64(1088314008174)
>
> cromeCELLS[1] = long_cromeid
>
> long_cromeid = np.uint64(1091194011015)
>
> cromeCELLS[2] = long_cromeid
>
> print "Num Cells:%d"%(numCROMECELLS)
>
> print "Pre-Kernel Value at 0 in long array is %d"%(cromeCELLS[0])
>
> zonal_stats_cuda_func(drv.In(cromeCELLS), numCROMECELLS, block=(32,1,1))
>
>
>
> ---output—
>
> Num Cells:91480
>
> Pre-Kernel Value at 0 in long array is 1091194009352
>
> Value in Kernel at 0 is 272316168
>
>
>
>
>
> Sanjay Rana | Design Directorate
>
> Rural Payments Agency | Room 200 | North Gate House | Reading | RG1 1AF
>
> Jabber: 02077642065 | ext. 42065 | Email: sanjay.r...@rpa.gsi.gov.uk
>
> Follow us on Twitter @Ruralpay
>
> ************************************************************
> ************************
> This email and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they
> are addressed. If you have received this email in error please notify
> the system manager.
>
> This footnote also confirms that this email message has been swept by
> Cisco ESA for the presence of computer viruses.
> ************************************************************
> ************************
>
> _______________________________________________
> PyCUDA mailing list
> PyCUDA@tiker.net
> https://lists.tiker.net/listinfo/pycuda
>
>
_______________________________________________
PyCUDA mailing list
PyCUDA@tiker.net
https://lists.tiker.net/listinfo/pycuda
