Hi, I would like to use new version of tridiagonal solver CusparseSgtsv2stridedbatch in Cusparse. I have CUDA 10.1 and PGI compiler 19.5 installed. Then I compiled one of my fortran codes as follows " pgf90 -c -Mcuda=cuda10.1 -Mcudalib=cusparse etauv_solver_gpu.f90 ", However, the compiler said ‘…

Hi Ye, Since the gtsv2 routines are new, we haven’t added them to our cuSparse interface module as of yet. We’ll work on that for a future release. In the meantime, you’ll need to provide you’re own interface. You can follow the one we use for cuSparsesgtsvstridedbatch as a template: PGI Fortran…

Hi Mat, Thanks for your advice. I made an interface declaration in my MODULE code as follows, interface integer (4) function cusparseSgtsv2StridedBatch(handle, m, dl, d, du, x, batchCount, batchStride,pBuffer) bind(C,name='cusparseSgtsv2StridedBatch') use cusparse implicit none …

Hi Mat, I defined pBuffer as integer (8) in the interface. Now the compiling seems OK, however the execution with cuda-memcheck gave me ========= Invalid global write of size 4 ========= at 0x000004d0 in void pcrGtsvBatchFirstPass(pcrGtsvBatchGlobalMemParams_t) ========= by thread (160,…

Hi Ye, While I have not used gtsv2 myself, I think you’re missing the step to allocate the buffer. bufferSizeExt just returns the size of the buffer, but does not allocate the buffer. Something like: real(SP), dimension(:),ALLOCATABLE, device :: Arow,Brow,Crow,Drow type(C_DEVPTR) :: buf …

Hi Mat, By studying several posts in the forum and stackflow, I realized that and make the modifications at the calling part as follows, integer(c_size_t) :: bufsize character(kind=c_char),device,allocatable,target :: buf(:) status = cusparseSgtsv2StridedBatch_bufferS…

How to use cusparseSgtsv2stridedbatch in cuda fortran

Accelerated Computing HPC Compilers Legacy PGI Compilers

MatColgrove July 8, 2019, 9:04pm 4

Try changing it to:

integer(8),value :: pBuffer

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How to use cusparseSgtsv2stridedbatch in cuda fortran

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