Public Member Functions | List of all members
strumpack::BLR::ProcessorGrid2D Class Reference

Representation of a 2D processor grid, similar to a BLACS grid, but not requiring ScaLAPACK. More...

#include <BLRMatrixMPI.hpp>

Public Member Functions

 ProcessorGrid2D (const MPIComm &comm)
 
 ProcessorGrid2D (const MPIComm &comm, int P)
 
const MPIComm & Comm () const
 
int nprows () const
 
int npcols () const
 
int prow () const
 
int pcol () const
 
int rank () const
 
int npactives () const
 
bool active () const
 
const MPIComm & row_comm () const
 
const MPIComm & col_comm () const
 
bool is_local_row (int i) const
 
bool is_local_col (int i) const
 
bool is_local (int i, int j) const
 
int rg2p (int i) const
 
int cg2p (int j) const
 
int g2p (int i, int j) const
 
void print () const
 

Detailed Description

Representation of a 2D processor grid, similar to a BLACS grid, but not requiring ScaLAPACK.

Constructor & Destructor Documentation

◆ ProcessorGrid2D() [1/2]

strumpack::BLR::ProcessorGrid2D::ProcessorGrid2D ( const MPIComm &  comm)

Main constructor. This will construct a 2d processor grid, as square as possible.

Parameters
commMPI communicator

◆ ProcessorGrid2D() [2/2]

strumpack::BLR::ProcessorGrid2D::ProcessorGrid2D ( const MPIComm &  comm,
int  P 
)

Some processes might not have a valid MPIComm (MPI_COMM_NULL) for this grid, but would still want to construct a conceptual 2D processor grid. This constructor allows this, by passing the number of processors in the communicator used to construct the grid.

The documentation for this class was generated from the following file: