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test_cusolver.f90
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test_cusolver.f90
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SUBROUTINE test_cusolver_real(ndim,mat)
!
USE cudafor
USE cusolverdn
!
IMPLICIT NONE
!
INTEGER, PARAMETER :: DP = SELECTED_REAL_KIND(14,200)
!
INTEGER, INTENT(IN) :: ndim
REAL(DP), INTENT(INOUT) :: mat(ndim,ndim)
!
INTEGER :: lwork
INTEGER :: ierr
INTEGER :: cr
INTEGER :: t1
INTEGER :: t2
INTEGER, ALLOCATABLE :: ipiv(:)
INTEGER, DEVICE :: info_d
INTEGER, DEVICE, ALLOCATABLE :: ipiv_d(:)
!
REAL(DP), ALLOCATABLE :: work(:)
REAL(DP), DEVICE, ALLOCATABLE :: mat_d(:,:)
REAL(DP), DEVICE, ALLOCATABLE :: work_d(:)
!
TYPE(cusolverDnHandle) :: cusolver_h
!
ierr = cusolverDnCreate(cusolver_h)
ierr = cusolverDnDgetrf_bufferSize(cusolver_h,ndim,ndim,mat_d,ndim,lwork)
!
ALLOCATE(ipiv(ndim))
ALLOCATE(work(1))
ALLOCATE(mat_d(ndim,ndim))
ALLOCATE(ipiv_d(ndim))
ALLOCATE(work_d(lwork))
!
mat_d(:,:) = mat
!
ierr = cudaDeviceSynchronize()
!
CALL SYSTEM_CLOCK(COUNT_RATE=cr)
CALL SYSTEM_CLOCK(t1)
!
ierr = cusolverDnDgetrf(cusolver_h,ndim,ndim,mat_d,ndim,work_d,ipiv_d,info_d)
!
CALL DGETRI(ndim,mat,ndim,ipiv,work,-1,ierr)
!
lwork = CEILING(work(1))
!
DEALLOCATE(work)
ALLOCATE(work(lwork))
!
ipiv(:) = ipiv_d
mat(:,:) = mat_d
!
CALL DGETRI(ndim,mat,ndim,ipiv,work,lwork,ierr)
!
CALL SYSTEM_CLOCK(t2)
!
PRINT *,"time2:",REAL(t2-t1)/REAL(cr)
!
DEALLOCATE(ipiv)
DEALLOCATE(work)
DEALLOCATE(mat_d)
DEALLOCATE(ipiv_d)
DEALLOCATE(work_d)
!
ierr = cusolverDnDestroy(cusolver_h)
!
END SUBROUTINE
!
SUBROUTINE test_cusolver_cmplx(ndim,mat)
!
USE cudafor
USE cusolverdn
!
IMPLICIT NONE
!
INTEGER, PARAMETER :: DP = SELECTED_REAL_KIND(14,200)
!
INTEGER, INTENT(IN) :: ndim
COMPLEX(DP), INTENT(INOUT) :: mat(ndim,ndim)
!
INTEGER :: lwork
INTEGER :: ierr
INTEGER :: cr
INTEGER :: t1
INTEGER :: t2
INTEGER, ALLOCATABLE :: ipiv(:)
INTEGER, DEVICE :: info_d
INTEGER, DEVICE, ALLOCATABLE :: ipiv_d(:)
!
COMPLEX(DP), ALLOCATABLE :: work(:)
COMPLEX(DP), DEVICE, ALLOCATABLE :: mat_d(:,:)
COMPLEX(DP), DEVICE, ALLOCATABLE :: work_d(:)
!
TYPE(cusolverDnHandle) :: cusolver_h
!
ierr = cusolverDnCreate(cusolver_h)
ierr = cusolverDnZgetrf_bufferSize(cusolver_h,ndim,ndim,mat_d,ndim,lwork)
!
ALLOCATE(ipiv(ndim))
ALLOCATE(work(1))
ALLOCATE(mat_d(ndim,ndim))
ALLOCATE(ipiv_d(ndim))
ALLOCATE(work_d(lwork))
!
mat_d(:,:) = mat
!
ierr = cudaDeviceSynchronize()
!
CALL SYSTEM_CLOCK(COUNT_RATE=cr)
CALL SYSTEM_CLOCK(t1)
!
ierr = cusolverDnZgetrf(cusolver_h,ndim,ndim,mat_d,ndim,work_d,ipiv_d,info_d)
!
CALL ZGETRI(ndim,mat,ndim,ipiv,work,-1,ierr)
!
lwork = CEILING(REAL(work(1)))
!
DEALLOCATE(work)
ALLOCATE(work(lwork))
!
ipiv(:) = ipiv_d
mat(:,:) = mat_d
!
CALL ZGETRI(ndim,mat,ndim,ipiv,work,lwork,ierr)
!
CALL SYSTEM_CLOCK(t2)
!
PRINT *,"time2:",REAL(t2-t1)/REAL(cr)
!
DEALLOCATE(ipiv)
DEALLOCATE(work)
DEALLOCATE(mat_d)
DEALLOCATE(ipiv_d)
DEALLOCATE(work_d)
!
ierr = cusolverDnDestroy(cusolver_h)
!
END SUBROUTINE