HPL_indxg2lp man page
HPL_indxg2lp — Map a local index into a global one.
void HPL_indxg2lp( int * IL, int * PROC, const int IG, const int INB, const int NB, const int SRCPROC, const int NPROCS );
HPL_indxg2lp computes the local index of a matrix entry pointed to by the global index IG as well as the process coordinate which posseses this entry. The local returned index is the same in all processes.
- IL (output) int *
On exit, IL specifies the local index corresponding to IG. IL is at least zero.
- PROC (output) int *
On exit, PROC is the coordinate of the process owning the entry specified by the global index IG. PROC is at least zero and less than NPROCS.
- 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, if SRCPROC = -1, the data is not distributed but replicated, in which case this routine returns IG in all processes. Otherwise, the value of SRCPROC is ignored.
- 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.
HPL_indxg2l (3), HPL_indxg2p (3), HPL_indxl2g (3), HPL_numroc (3), HPL_numrocI (3).