PLASMA  2.8.0
PLASMA - Parallel Linear Algebra for Scalable Multi-core Architectures
int PLASMA_dsposv_Tile ( PLASMA_enum  uplo,
PLASMA_desc A,
PLASMA_desc B,
PLASMA_desc X,
int *  ITER 
)

PLASMA_dsposv_Tile - Solves a symmetric positive definite or Hermitian positive definite system of linear equations using the Cholesky factorization and mixed-precision iterative refinement. Tile equivalent of PLASMA_dsposv(). Operates on matrices stored by tiles. All matrices are passed through descriptors. All dimensions are taken from the descriptors.

Parameters
[in]uploSpecifies whether the matrix A is upper triangular or lower triangular: = PlasmaUpper: Upper triangle of A is stored; = PlasmaLower: Lower triangle of A is stored.
[in,out]AOn entry, the N-by-N symmetric positive definite (or Hermitian) coefficient matrix A. If uplo = PlasmaUpper, the leading N-by-N upper triangular part of A contains the upper triangular part of the matrix A, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading N-by-N lower triangular part of A contains the lower triangular part of the matrix A, and the strictly upper triangular part of A is not referenced.
  • If the iterative refinement converged, A is not modified;
  • otherwise, it falled backed to double precision solution,
[in]BOn entry, the N-by-NRHS matrix of right hand side matrix B.
[out]XOn exit, if return value = 0, the N-by-NRHS solution matrix X.
[out]ITERThe number of the current iteration in the iterative refinement process
Returns
Return values
PLASMA_SUCCESSsuccessful exit
>0if i, the leading minor of order i of A is not positive definite, so the factorization could not be completed, and the solution has not been computed.
See also
PLASMA_dsposv
PLASMA_dsposv_Tile_Async
PLASMA_dsposv_Tile
PLASMA_dposv_Tile