Tuan
Joined: 11 Jun 2009
Posts: 226
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 Posted: Wed Feb 17, 2010 10:58 pm Post subject: passing device allocatable array to kernel subprogram |
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when i use static array like
| Code: | integer, dimension(10,10), device :: arr2
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instead of
| Code: | integer, dimension(:,:), allocatable, device :: arr2
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the code below works fine.
| Code: | module test_mod
use cudafor
real, dimension(10,10), device :: arr1
integer, dimension(:,:),allocatable, device :: arr2
! integer, dimension(10,10), device :: arr2
contains
attributes(global) subroutine doOnGPU()
integer, value :: i, j
i = threadIdx%x
do j = 1, 10
arr1(i,j) = i +j/0.5d0
arr1(i,j) = i + j + arr1(arr2(i,i), j)
enddo
end subroutine doOnGPU
subroutine doOnCPU()
allocate(arr2(10,10))
arr2 = 1;
call doOnGPU<<<1, 10>>>()
end subroutine doOnCPU
end module test_mod
program test1
use test_mod
call doOnCPU()
end program test1
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However, when I use allocatable, I get this warning
| Quote: | /tmp/pgcudaforVr5cnWS3-zwQ.gpu: In function `doongpu':
/tmp/pgcudaforVr5cnWS3-zwQ.gpu:17: warning: cast to pointer from integer of different size
/tmp/pgcudaforVr5cnWS3-zwQ.gpu(17): Warning: Cannot tell what pointer points to, assuming global memory space
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Could you please tell me why?
Thanks,
Tuan |
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mkcolg
Joined: 30 Jun 2004
Posts: 4996
Location: The Portland Group Inc.
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| Posted: Thu Feb 18, 2010 9:44 pm Post subject: |
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Hi Tuan,
Currently only fixed size device arrays are allowed in a Module. However, we are actively working on adding this (it's our most requested feature). It should be available in 10.6 or possibly sooner.
- Mat |
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