SuperLU_DIST
4.0
superlu_dist on CPU and GPU clusters
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Performs panel LU factorization. More...
Functions | |
void | pdgstrf2_trsm (superlu_options_t *options, int_t k0, int_t k, double thresh, Glu_persist_t *Glu_persist, gridinfo_t *grid, LocalLU_t *Llu, MPI_Request *U_diag_blk_send_req, int tag_ub, SuperLUStat_t *stat, int *info) |
void | pdgstrs2_omp (int_t k0, int_t k, Glu_persist_t *Glu_persist, gridinfo_t *grid, LocalLU_t *Llu, SuperLUStat_t *stat) |
Performs panel LU factorization.
– Distributed SuperLU routine (version 4.0) – Lawrence Berkeley National Lab, Univ. of California Berkeley. August 15, 2014
Purpose
Panel factorization – block column k
Factor diagonal and subdiagonal blocks and test for exact singularity. Only the column processes that own block column k participate in the work.
Arguments
options (input) superlu_options_t* (global) The structure defines the input parameters to control how the LU decomposition will be performed.
k0 (input) int (global) Counter of the next supernode to be factorized.
k (input) int (global) The column number of the block column to be factorized.
thresh (input) double (global) The threshold value = s_eps * anorm.
Glu_persist (input) Glu_persist_t* Global data structures (xsup, supno) replicated on all processes.
grid (input) gridinfo_t* The 2D process mesh.
Llu (input/output) LocalLU_t* Local data structures to store distributed L and U matrices.
U_diag_blk_send_req (input/output) MPI_Request* List of send requests to send down the diagonal block of U.
tag_ub (input) int Upper bound of MPI tag values.
stat (output) SuperLUStat_t* Record the statistics about the factorization. See SuperLUStat_t structure defined in util.h.
info (output) int* = 0: successful exit < 0: if info = -i, the i-th argument had an illegal value > 0: if info = i, U(i,i) is exactly zero. The factorization has been completed, but the factor U is exactly singular, and division by zero will occur if it is used to solve a system of equations.
void pdgstrf2_trsm | ( | superlu_options_t * | options, |
int_t | k0, | ||
int_t | k, | ||
double | thresh, | ||
Glu_persist_t * | Glu_persist, | ||
gridinfo_t * | grid, | ||
LocalLU_t * | Llu, | ||
MPI_Request * | U_diag_blk_send_req, | ||
int | tag_ub, | ||
SuperLUStat_t * | stat, | ||
int * | info | ||
) |
ALWAYS SEND TO ALL OTHERS - TO FIX
void pdgstrs2_omp | ( | int_t | k0, |
int_t | k, | ||
Glu_persist_t * | Glu_persist, | ||
gridinfo_t * | grid, | ||
LocalLU_t * | Llu, | ||
SuperLUStat_t * | stat | ||
) |