amg4psblas/psb_slud_impl.c

/*
 *                    MD2P4
 *    Multilevel Domain Decomposition Parallel Preconditioner Package for PSBLAS
 *                              for 
 *                    Parallel Sparse BLAS  v2.0
 *
 *   (C) Copyright 2006 Salvatore Filippone    University of Rome Tor Vergata
 *                      Alfredo Buttari
 *                      Daniela di Serafino    Second University of Naples
 *                      Pasqua D'Ambra         ICAR-CNR
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions, and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *   3. The name of the MD2P4 group or the names of its contributors may
 *      not be used to endorse or promote products derived from this
 *      software without specific written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MD2P4 GROUP OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */
/* This file is an interface to the SuperLUDist routines for sparse
   factorization.  It was obtaned by modifying the
   c_fortran_dgssv.c file from the SuperLU source distribution;
   original copyright terms reproduced below. 
   
   PSBLAS v 2.0  */ 


/*		=====================

Copyright (c) 2003, The Regents of the University of California, through
Lawrence Berkeley National Laboratory (subject to receipt of any required 
approvals from U.S. Dept. of Energy) 

All rights reserved. 

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met: 

(1) Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer. 
(2) Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution. 
(3) Neither the name of Lawrence Berkeley National Laboratory, U.S. Dept. of
Energy nor the names of its contributors may be used to endorse or promote
products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  
*/

/*
 * -- Distributed SuperLU routine (version 2.0) --
 * Lawrence Berkeley National Lab, Univ. of California Berkeley.
 * March 15, 2003
 *
 */

#ifdef Have_SLUDist_
#include <math.h>
#include "superlu_ddefs.h"

#define HANDLE_SIZE  8
/* kind of integer to hold a pointer.  Use int.
   This might need to be changed on 64-bit systems. */
#ifdef LargeFptr
typedef long long fptr;  /* 32-bit by default */
#else
typedef int fptr;  /* 32-bit by default */
#endif

typedef struct {
  SuperMatrix *A;
  LUstruct_t *LUstruct;
  gridinfo_t *grid;
  ScalePermstruct_t *ScalePermstruct;
} factors_t;


#else

#include <stdio.h>

#endif


#ifdef Add_
#define psb_dsludist_factor_ psb_dsludist_factor_
#define psb_dsludist_solve_  psb_dsludist_solve_
#define psb_dsludist_free_   psb_dsludist_free_
#endif
#ifdef AddDouble_
#define psb_dsludist_factor_ psb_dsludist_factor__
#define psb_dsludist_solve_  psb_dsludist_solve__
#define psb_dsludist_free_   psb_dsludist_free__
#endif
#ifdef NoChange
#define psb_dsludist_factor_ psb_dsludist_factor
#define psb_dsludist_solve_  psb_dsludist_solve
#define psb_dsludist_free_   psb_dsludist_free
#endif




void
psb_dsludist_factor_(int *n, int *nl, int *nnzl, int *ffstr,
		     double *values, int *rowptr, int *colind,
#ifdef Have_SLUDist_		 
		     fptr *f_factors, /* a handle containing the address
					 pointing to the factored matrices */
#else 
		     void *f_factors,
#endif
		     int *nprow, int *npcol,    int *info)

{
/* 
 * This routine can be called from Fortran.
 *  performs LU decomposition.
 *
 * f_factors (input/output) fptr* 
 *      On  output contains the pointer pointing to
 *       the structure of the factored matrices.
 *
 */
 
#ifdef Have_SLUDist_
    SuperMatrix *A;
    NRformat_loc *Astore;

    ScalePermstruct_t *ScalePermstruct;
    LUstruct_t *LUstruct;
    SOLVEstruct_t SOLVEstruct;
    gridinfo_t *grid;
    int      i, panel_size, permc_spec, relax;
    trans_t  trans;
    double   drop_tol = 0.0,b[1],berr[1];
    mem_usage_t   mem_usage;
    superlu_options_t options;
    SuperLUStat_t stat;
    factors_t *LUfactors;
    int fst_row;
    int *icol,*irpt;
    double *ival;

    trans = NOTRANS;
/*     fprintf(stderr,"Entry to sludist_factor\n");     */
    grid = (gridinfo_t *) SUPERLU_MALLOC(sizeof(gridinfo_t));
    superlu_gridinit(MPI_COMM_WORLD, *nprow, *npcol, grid);
    /* Initialize the statistics variables. */
    PStatInit(&stat);
    fst_row = (*ffstr) -1;
    /* Adjust to 0-based indexing */
    icol = (int *) malloc((*nnzl)*sizeof(int));
    irpt = (int *) malloc(((*nl)+1)*sizeof(int));
    ival = (double *) malloc((*nnzl)*sizeof(double));
    for (i = 0; i < *nnzl; ++i) ival[i] = values[i];
    for (i = 0; i < *nnzl; ++i) icol[i] = colind[i] -1;
    for (i = 0; i <= *nl; ++i)  irpt[i] = rowptr[i] -1;
    
    A  = (SuperMatrix *) malloc(sizeof(SuperMatrix));
    dCreate_CompRowLoc_Matrix_dist(A, *n, *n, *nnzl, *nl, fst_row,
				   ival, icol, irpt,
				   SLU_NR_loc, SLU_D, SLU_GE);
    
    /* Initialize ScalePermstruct and LUstruct. */
    ScalePermstruct = (ScalePermstruct_t *) SUPERLU_MALLOC(sizeof(ScalePermstruct_t));
    LUstruct = (LUstruct_t *) SUPERLU_MALLOC(sizeof(LUstruct_t));
    ScalePermstructInit(*n,*n, ScalePermstruct);
    LUstructInit(*n,*n, LUstruct);

    /* Set the default input options. */
    set_default_options_dist(&options);
    options.IterRefine=NO;
    options.PrintStat=NO;

    pdgssvx(&options, A, ScalePermstruct, b, *nl, 0,
	    grid, LUstruct, &SOLVEstruct, berr, &stat, info);
    
    if ( *info == 0 ) {
      ;
    } else {
      printf("pdgssvx() error returns INFO= %d\n", *info);
      if ( *info <= *n ) { /* factorization completes */
	; 
      }
    }
    if (options.SolveInitialized) {
      dSolveFinalize(&options,&SOLVEstruct);
    }
    
    
    /* Save the LU factors in the factors handle */
    LUfactors = (factors_t *) SUPERLU_MALLOC(sizeof(factors_t));
    LUfactors->LUstruct = LUstruct;
    LUfactors->grid     = grid;
    LUfactors->A        = A;
    LUfactors->ScalePermstruct = ScalePermstruct;  
/*     fprintf(stderr,"slud factor: LUFactors %p \n",LUfactors);  */
/*     fprintf(stderr,"slud factor: A %p %p\n",A,LUfactors->A);  */
/*     fprintf(stderr,"slud factor: grid %p %p\n",grid,LUfactors->grid);  */
/*     fprintf(stderr,"slud factor: LUstruct %p %p\n",LUstruct,LUfactors->LUstruct);  */
    *f_factors = (fptr) LUfactors;
    
    PStatFree(&stat);
#else
    fprintf(stderr," SLUDist Not Configured, fix make.inc and recompile\n");
    *info=-1;
#endif
}


void
psb_dsludist_solve_(int *itrans, int *n, int *nrhs, 
                 double *b, int *ldb,
#ifdef Have_SLUDist_		 
		 fptr *f_factors, /* a handle containing the address
				     pointing to the factored matrices */
#else 
		 void *f_factors,
#endif
		 int *info)

{
/* 
 * This routine can be called from Fortran.
 *      performs triangular solve
 *
 */
#ifdef Have_SLUDist_ 
    SuperMatrix *A;
    ScalePermstruct_t *ScalePermstruct;
    LUstruct_t *LUstruct;
    SOLVEstruct_t SOLVEstruct;
    gridinfo_t *grid;
    int      i, panel_size, permc_spec, relax;
    trans_t  trans;
    double   drop_tol = 0.0;
    double *berr;
    mem_usage_t   mem_usage;
    superlu_options_t options;
    SuperLUStat_t stat;
    factors_t *LUfactors;

    LUfactors       = (factors_t *) *f_factors   ;
    A               = LUfactors->A              ;
    LUstruct        = LUfactors->LUstruct       ;
    grid            = LUfactors->grid           ;

    ScalePermstruct = LUfactors->ScalePermstruct;
/*     fprintf(stderr,"slud solve: LUFactors %p \n",LUfactors);  */
/*     fprintf(stderr,"slud solve: A %p %p\n",A,LUfactors->A);  */
/*     fprintf(stderr,"slud solve: grid %p %p\n",grid,LUfactors->grid);  */
/*     fprintf(stderr,"slud solve: LUstruct %p %p\n",LUstruct,LUfactors->LUstruct);  */


    if (*itrans == 0) {
      trans = NOTRANS;
    } else if (*itrans ==1) {
      trans = TRANS;
    } else if (*itrans ==2) {
      trans = CONJ;
    } else {
      trans = NOTRANS;
    }

/*     fprintf(stderr,"Entry to sludist_solve\n"); */
    berr = (double *) malloc((*nrhs) *sizeof(double));

    /* Initialize the statistics variables. */
    PStatInit(&stat);
    
    /* Set the default input options. */
    set_default_options_dist(&options);
    options.IterRefine = NO;
    options.Fact       = FACTORED;
    options.PrintStat  = NO;

    pdgssvx(&options, A, ScalePermstruct, b, *ldb, *nrhs, 
	    grid, LUstruct, &SOLVEstruct, berr, &stat, info);
    
/*     fprintf(stderr,"Double check: after solve %d %lf\n",*info,berr[0]); */
    if (options.SolveInitialized) {
      dSolveFinalize(&options,&SOLVEstruct);
    }
    PStatFree(&stat);
    free(berr);
#else
    fprintf(stderr," SLUDist Not Configured, fix make.inc and recompile\n");
    *info=-1;
#endif
    
}


void
psb_dsludist_free_(
#ifdef Have_SLUDist_		 
 fptr *f_factors, /* a handle containing the address
				     pointing to the factored matrices */
#else 
		 void *f_factors,
#endif
		 int *info)

{
/* 
 * This routine can be called from Fortran.
 *
 *      free all storage in the end
 *
 */
#ifdef Have_SLUDist_ 
    SuperMatrix *A;
    ScalePermstruct_t *ScalePermstruct;
    LUstruct_t *LUstruct;
    SOLVEstruct_t SOLVEstruct;
    gridinfo_t *grid;
    int      i, panel_size, permc_spec, relax;
    trans_t  trans;
    double   drop_tol = 0.0;
    double *berr;
    mem_usage_t   mem_usage;
    superlu_options_t options;
    SuperLUStat_t stat;
    factors_t *LUfactors;

    LUfactors       = (factors_t *) *f_factors  ;
    A               = LUfactors->A              ;
    LUstruct        = LUfactors->LUstruct       ;
    grid            = LUfactors->grid           ;
    ScalePermstruct = LUfactors->ScalePermstruct;

    Destroy_CompRowLoc_Matrix_dist(A);
    ScalePermstructFree(ScalePermstruct);
    LUstructFree(LUstruct);
    superlu_gridexit(grid);

    free(grid);
    free(LUstruct);
    free(LUfactors);

#else
    fprintf(stderr," SLUDist Not Configured, fix make.inc and recompile\n");
    *info=-1;
#endif
}