HPL_indxg2p man page

HPL_indxg2p — Map a global index into a process coordinate.

Synopsis

#include "hpl.h"
 int HPL_indxg2p( const int IG, const int INB, const int NB, const int SRCPROC, const int NPROCS );

Description

HPL_indxg2p computes the process coordinate  which posseses the entry of a matrix specified by a global index IG.

Arguments

IG      (input)                 const int

On entry, IG specifies the global index of the matrix  entry. IG must be at least zero.

INB     (input)                 const int

On entry,  INB  specifies  the size of the first block of the global matrix. INB must be at least one.

NB      (input)                 const int

On entry,  NB specifies the blocking factor used to partition and distribute the matrix A. NB must be larger than one.

SRCPROC (input)                 const int

On entry,  SRCPROC  specifies  the coordinate of the  process that possesses the first row or column of the matrix. SRCPROC must be at least zero and strictly less than NPROCS.

NPROCS  (input)                 const int

On entry,  NPROCS  specifies the total number of process rows or columns over which the matrix is distributed.  NPROCS must be at least one.

See Also

HPL_indxg2l (3), HPL_indxg2p (3), HPL_indxl2g (3), HPL_numroc (3), HPL_numrocI (3).

Info

October 26, 2012 HPL 2.1 HPL Library Functions