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hypre/test/driver_commpkg.c
falgout e3181f26b1 Added 64 bit feature using HYPRE_Int (see tracker [issue489] for details). 
Changed MPI routines to hypre_MPI routines.
Added hypre_printf, etc. routines.
Added AUTOTEST tests to look for 'int' and 'MPI_' calls.
Added a new approach for the Fortran interface (not implemented everywhere yet).
2010-12-20 19:27:44 +00:00

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/*BHEADER**********************************************************************
* Copyright (c) 2008, Lawrence Livermore National Security, LLC.
* Produced at the Lawrence Livermore National Laboratory.
* This file is part of HYPRE. See file COPYRIGHT for details.
*
* HYPRE is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License (as published by the Free
* Software Foundation) version 2.1 dated February 1999.
*
* $Revision$
***********************************************************************EHEADER*/
/* driver_commpkg.c*/
/* AHB 06/04 */
/* purpose: to test a new communication package for the ij interface */
/* 11/06 - if you want to use this, the the hypre_NewCommPkgCreate has to be
reinstated in parcsr_mv/new_commpkg.c - currently it won't compile*/
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
/* #include <mpi.h> */
#include "_hypre_utilities.h"
#include "_hypre_parcsr_mv.h"
#include "HYPRE_parcsr_ls.h"
/* #include "_hypre_parcsr_ls.h"
#include "HYPRE.h"
#include "HYPRE_parcsr_mv.h"
#include "HYPRE_krylov.h" */
/*some debugging tools*/
#define mydebug 0
#define mpip_on 0
/*time an allgather in addition to the current commpkg -
since the allgather happens outside of the communication package.*/
#define time_gather 1
/* for timing multiple commpkg setup (if you want the time to be larger in the
hopes of getting smaller stds - often not effective) */
#define LOOP2 1
HYPRE_Int myBuildParLaplacian (HYPRE_Int argc , char *argv [], HYPRE_Int arg_index , HYPRE_ParCSRMatrix *A_ptr, HYPRE_Int parmprint );
HYPRE_Int myBuildParLaplacian27pt (HYPRE_Int argc , char *argv [], HYPRE_Int arg_index , HYPRE_ParCSRMatrix *A_ptr, HYPRE_Int parmprint );
void stats_mo(double*, HYPRE_Int, double *,double *);
/*==========================================================================*/
/*------------------------------------------------------------------
*
* This tests an alternate comm package for ij
*
* options:
* -laplacian 3D 7pt stencil
* -27pt 3D 27pt laplacian
* -fromonecsrfile read matrix from a csr file
* -commpkg <HYPRE_Int> 1 = new comm. package
* 2 =old
* 3 = both (default)
* -loop <HYPRE_Int> number of times to loop (default is 0)
* -verbose print more error checking
* -noparmprint don't print the parameters
*-------------------------------------------------------------------*/
HYPRE_Int
main( HYPRE_Int argc,
char *argv[] )
{
HYPRE_Int num_procs, myid;
HYPRE_Int verbose = 0, build_matrix_type = 1;
HYPRE_Int index, matrix_arg_index, commpkg_flag=3;
HYPRE_Int i, k, ierr=0;
HYPRE_Int row_start, row_end;
HYPRE_Int col_start, col_end, global_num_rows;
HYPRE_Int *row_part, *col_part;
char *csrfilename;
HYPRE_Int preload = 0, loop = 0, loop2 = LOOP2;
HYPRE_Int bcast_rows[2], *info;
hypre_ParCSRMatrix *parcsr_A, *small_A;
HYPRE_ParCSRMatrix A_temp, A_temp_small;
hypre_CSRMatrix *A_CSR;
hypre_ParCSRCommPkg *comm_pkg;
HYPRE_Int nx, ny, nz;
HYPRE_Int P, Q, R;
HYPRE_Int p, q, r;
double values[4];
hypre_ParVector *x_new;
hypre_ParVector *y_new, *y;
HYPRE_Int *row_starts;
double ans;
double start_time, end_time, total_time, *loop_times;
double T_avg, T_std;
HYPRE_Int noparmprint = 0;
#if mydebug
HYPRE_Int j, tmp_int;
#endif
/*-----------------------------------------------------------
* Initialize MPI
*-----------------------------------------------------------*/
hypre_MPI_Init(&argc, &argv);
hypre_MPI_Comm_size(hypre_MPI_COMM_WORLD, &num_procs );
hypre_MPI_Comm_rank(hypre_MPI_COMM_WORLD, &myid );
/*-----------------------------------------------------------
* default - is 27pt laplace
*-----------------------------------------------------------*/
build_matrix_type = 2;
matrix_arg_index = argc;
/*-----------------------------------------------------------
* Parse command line
*-----------------------------------------------------------*/
index = 1;
while ( index < argc)
{
if ( strcmp(argv[index], "-verbose") == 0 )
{
index++;
verbose = 1;
}
else if ( strcmp(argv[index], "-fromonecsrfile") == 0 )
{
index++;
build_matrix_type = 1;
matrix_arg_index = index; /*this tells where the name is*/
}
else if ( strcmp(argv[index], "-commpkg") == 0 )
{
index++;
commpkg_flag = atoi(argv[index++]);
}
else if ( strcmp(argv[index], "-laplacian") == 0 )
{
index++;
build_matrix_type = 2;
matrix_arg_index = index;
}
else if ( strcmp(argv[index], "-27pt") == 0 )
{
index++;
build_matrix_type = 4;
matrix_arg_index = index;
}
/*
else if ( strcmp(argv[index], "-nopreload") == 0 )
{
index++;
preload = 0;
}
*/
else if ( strcmp(argv[index], "-loop") == 0 )
{
index++;
loop = atoi(argv[index++]);
}
else if ( strcmp(argv[index], "-noparmprint") == 0 )
{
index++;
noparmprint = 1;
}
else
{
index++;
/*hypre_printf("Warning: Unrecogized option '%s'\n",argv[index++] );*/
}
}
/*-----------------------------------------------------------
* Setup the Matrix problem
*-----------------------------------------------------------*/
/*-----------------------------------------------------------
* Get actual partitioning-
* read in an actual csr matrix.
*-----------------------------------------------------------*/
if (build_matrix_type ==1) /*read in a csr matrix from one file */
{
if (matrix_arg_index < argc)
{
csrfilename = argv[matrix_arg_index];
}
else
{
hypre_printf("Error: No filename specified \n");
exit(1);
}
if (myid == 0)
{
/*hypre_printf(" FromFile: %s\n", csrfilename);*/
A_CSR = hypre_CSRMatrixRead(csrfilename);
}
row_part = NULL;
col_part = NULL;
parcsr_A = hypre_CSRMatrixToParCSRMatrix(hypre_MPI_COMM_WORLD, A_CSR,
row_part, col_part);
if (myid == 0) hypre_CSRMatrixDestroy(A_CSR);
}
else if (build_matrix_type ==2)
{
myBuildParLaplacian(argc, argv, matrix_arg_index, &A_temp, !noparmprint);
parcsr_A = (hypre_ParCSRMatrix *) A_temp;
}
else if (build_matrix_type ==4)
{
myBuildParLaplacian27pt(argc, argv, matrix_arg_index, &A_temp, !noparmprint);
parcsr_A = (hypre_ParCSRMatrix *) A_temp;
}
/*-----------------------------------------------------------
* create a small problem so that timings are more accurate -
* code gets run twice (small laplace)
*-----------------------------------------------------------*/
/*this is no longer being used - preload = 0 is set at the beginning */
if (preload == 1)
{
/*hypre_printf("preload!\n");*/
values[1] = -1;
values[2] = -1;
values[3] = -1;
values[0] = - 6.0 ;
nx = 2;
ny = num_procs;
nz = 2;
P = 1;
Q = num_procs;
R = 1;
p = myid % P;
q = (( myid - p)/P) % Q;
r = ( myid - p - P*q)/( P*Q );
A_temp_small = (HYPRE_ParCSRMatrix) GenerateLaplacian(hypre_MPI_COMM_WORLD, nx, ny, nz,
P, Q, R, p, q, r, values);
small_A = (hypre_ParCSRMatrix *) A_temp_small;
/*do comm packages*/
hypre_NewCommPkgCreate(small_A);
hypre_NewCommPkgDestroy(small_A);
hypre_MatvecCommPkgCreate(small_A);
hypre_ParCSRMatrixDestroy(small_A);
}
/*-----------------------------------------------------------
* Prepare for timing
*-----------------------------------------------------------*/
/* instead of preloading, let's not time the first one if more than one*/
if (!loop)
{
loop = 1;
/* and don't do any timings */
}
else
{
loop +=1;
if (loop < 2) loop = 2;
}
loop_times = hypre_CTAlloc(double, loop);
/******************************************************************************************/
hypre_MPI_Barrier(hypre_MPI_COMM_WORLD);
if (commpkg_flag == 1 || commpkg_flag ==3 )
{
/*-----------------------------------------------------------
* Create new comm package
*-----------------------------------------------------------*/
if (!myid) hypre_printf("********************************************************\n" );
/*do loop times*/
for (i=0; i< loop; i++)
{
loop_times[i] = 0.0;
for (k=0; k< loop2; k++)
{
hypre_MPI_Barrier(hypre_MPI_COMM_WORLD);
start_time = hypre_MPI_Wtime();
#if mpip_on
if (i==(loop-1)) hypre_MPI_Pcontrol(1);
#endif
hypre_NewCommPkgCreate(parcsr_A);
#if mpip_on
if (i==(loop-1)) hypre_MPI_Pcontrol(0);
#endif
end_time = hypre_MPI_Wtime();
end_time = end_time - start_time;
hypre_MPI_Allreduce(&end_time, &total_time, 1,
hypre_MPI_DOUBLE, hypre_MPI_MAX, hypre_MPI_COMM_WORLD);
loop_times[i] += total_time;
if ( !((i+1)== loop && (k+1) == loop2)) hypre_NewCommPkgDestroy(parcsr_A);
}/*end of loop2 */
} /*end of loop*/
/* calculate the avg and std. */
if (loop > 1)
{
/* calculate the avg and std. */
stats_mo(loop_times, loop, &T_avg, &T_std);
if (!myid) hypre_printf(" NewCommPkgCreate: AVG. wall clock time = %f seconds\n", T_avg);
if (!myid) hypre_printf(" STD. for %d runs = %f\n", loop-1, T_std);
if (!myid) hypre_printf(" (Note: avg./std. timings exclude run 0.)\n");
if (!myid) hypre_printf("********************************************************\n" );
for (i=0; i< loop; i++)
{
if (!myid) hypre_printf(" run %d = %f sec.\n", i, loop_times[i]);
}
if (!myid) hypre_printf("********************************************************\n" );
}
else
{
if (!myid) hypre_printf("********************************************************\n" );
if (!myid) hypre_printf(" NewCommPkgCreate:\n");
if (!myid) hypre_printf(" run time = %f sec.\n", loop_times[0]);
if (!myid) hypre_printf("********************************************************\n" );
}
/*-----------------------------------------------------------
* Verbose printing
*-----------------------------------------------------------*/
/*some verification*/
global_num_rows = hypre_ParCSRMatrixGlobalNumRows(parcsr_A);
if (verbose)
{
ierr = hypre_ParCSRMatrixGetLocalRange( parcsr_A,
&row_start, &row_end ,
&col_start, &col_end );
comm_pkg = hypre_ParCSRMatrixCommPkg(parcsr_A);
hypre_printf("myid = %i, my ACTUAL local range: [%i, %i]\n", myid,
row_start, row_end);
ierr = hypre_GetAssumedPartitionRowRange( myid, global_num_rows, &row_start,
&row_end);
hypre_printf("myid = %i, my assumed local range: [%i, %i]\n", myid,
row_start, row_end);
hypre_printf("myid = %d, num_recvs = %d\n", myid,
hypre_ParCSRCommPkgNumRecvs(comm_pkg) );
#if mydebug
for (i=0; i < hypre_ParCSRCommPkgNumRecvs(comm_pkg); i++)
{
hypre_printf("myid = %d, recv proc = %d, vec_starts = [%d : %d]\n",
myid, hypre_ParCSRCommPkgRecvProcs(comm_pkg)[i],
hypre_ParCSRCommPkgRecvVecStarts(comm_pkg)[i],
hypre_ParCSRCommPkgRecvVecStarts(comm_pkg)[i+1]-1);
}
#endif
hypre_printf("myid = %d, num_sends = %d\n", myid,
hypre_ParCSRCommPkgNumSends(comm_pkg) );
#if mydebug
for (i=0; i <hypre_ParCSRCommPkgNumSends(comm_pkg) ; i++)
{
tmp_int = hypre_ParCSRCommPkgSendMapStarts(comm_pkg)[i+1] -
hypre_ParCSRCommPkgSendMapStarts(comm_pkg)[i];
index = hypre_ParCSRCommPkgSendMapStarts(comm_pkg)[i];
for (j=0; j< tmp_int; j++)
{
hypre_printf("myid = %d, send proc = %d, send element = %d\n",myid,
hypre_ParCSRCommPkgSendProcs(comm_pkg)[i],
hypre_ParCSRCommPkgSendMapElmts(comm_pkg)[index+j]);
}
}
#endif
}
/*-----------------------------------------------------------
* To verify correctness (if commpkg_flag = 3)
*-----------------------------------------------------------*/
if (commpkg_flag == 3 )
{
/*do a matvec - we are assuming a square matrix */
row_starts = hypre_ParCSRMatrixRowStarts(parcsr_A);
x_new = hypre_ParVectorCreate(hypre_MPI_COMM_WORLD, global_num_rows, row_starts);
hypre_ParVectorSetPartitioningOwner(x_new, 0);
hypre_ParVectorInitialize(x_new);
hypre_ParVectorSetRandomValues(x_new, 1);
y_new = hypre_ParVectorCreate(hypre_MPI_COMM_WORLD, global_num_rows, row_starts);
hypre_ParVectorSetPartitioningOwner(y_new, 0);
hypre_ParVectorInitialize(y_new);
hypre_ParVectorSetConstantValues(y_new, 0.0);
/*y = 1.0*A*x+1.0*y */
hypre_ParCSRMatrixMatvec (1.0, parcsr_A, x_new, 1.0, y_new);
}
/*-----------------------------------------------------------
* Clean up after MyComm
*-----------------------------------------------------------*/
hypre_NewCommPkgDestroy(parcsr_A);
}
/******************************************************************************************/
/******************************************************************************************/
hypre_MPI_Barrier(hypre_MPI_COMM_WORLD);
if (commpkg_flag > 1 )
{
/*-----------------------------------------------------------
* Set up standard comm package
*-----------------------------------------------------------*/
bcast_rows[0] = 23;
bcast_rows[1] = 1789;
if (!myid) hypre_printf("********************************************************\n" );
/*do loop times*/
for (i=0; i< loop; i++)
{
loop_times[i] = 0.0;
for (k=0; k< loop2; k++)
{
hypre_MPI_Barrier(hypre_MPI_COMM_WORLD);
start_time = hypre_MPI_Wtime();
#if time_gather
info = hypre_CTAlloc(HYPRE_Int, num_procs);
hypre_MPI_Allgather(bcast_rows, 1, HYPRE_MPI_INT, info, 1, HYPRE_MPI_INT, hypre_MPI_COMM_WORLD);
#endif
hypre_MatvecCommPkgCreate(parcsr_A);
end_time = hypre_MPI_Wtime();
end_time = end_time - start_time;
hypre_MPI_Allreduce(&end_time, &total_time, 1,
hypre_MPI_DOUBLE, hypre_MPI_MAX, hypre_MPI_COMM_WORLD);
loop_times[i] += total_time;
if ( !((i+1)== loop && (k+1) == loop2)) hypre_MatvecCommPkgDestroy(hypre_ParCSRMatrixCommPkg(parcsr_A));
}/* end of loop 2*/
} /*end of loop*/
/* calculate the avg and std. */
if (loop > 1)
{
stats_mo(loop_times, loop, &T_avg, &T_std);
if (!myid) hypre_printf("Current CommPkgCreate: AVG. wall clock time = %f seconds\n", T_avg);
if (!myid) hypre_printf(" STD. for %d runs = %f\n", loop-1, T_std);
if (!myid) hypre_printf(" (Note: avg./std. timings exclude run 0.)\n");
if (!myid) hypre_printf("********************************************************\n" );
for (i=0; i< loop; i++)
{
if (!myid) hypre_printf(" run %d = %f sec.\n", i, loop_times[i]);
}
if (!myid) hypre_printf("********************************************************\n" );
}
else
{
if (!myid) hypre_printf("********************************************************\n" );
if (!myid) hypre_printf(" Current CommPkgCreate:\n");
if (!myid) hypre_printf(" run time = %f sec.\n", loop_times[0]);
if (!myid) hypre_printf("********************************************************\n" );
}
/*-----------------------------------------------------------
* Verbose printing
*-----------------------------------------------------------*/
/*some verification*/
if (verbose)
{
ierr = hypre_ParCSRMatrixGetLocalRange( parcsr_A,
&row_start, &row_end ,
&col_start, &col_end );
comm_pkg = hypre_ParCSRMatrixCommPkg(parcsr_A);
hypre_printf("myid = %i, std - my local range: [%i, %i]\n", myid,
row_start, row_end);
ierr = hypre_ParCSRMatrixGetLocalRange( parcsr_A,
&row_start, &row_end ,
&col_start, &col_end );
hypre_printf("myid = %d, std - num_recvs = %d\n", myid,
hypre_ParCSRCommPkgNumRecvs(comm_pkg) );
#if mydebug
for (i=0; i < hypre_ParCSRCommPkgNumRecvs(comm_pkg); i++)
{
hypre_printf("myid = %d, std - recv proc = %d, vec_starts = [%d : %d]\n",
myid, hypre_ParCSRCommPkgRecvProcs(comm_pkg)[i],
hypre_ParCSRCommPkgRecvVecStarts(comm_pkg)[i],
hypre_ParCSRCommPkgRecvVecStarts(comm_pkg)[i+1]-1);
}
#endif
hypre_printf("myid = %d, std - num_sends = %d\n", myid,
hypre_ParCSRCommPkgNumSends(comm_pkg));
#if mydebug
for (i=0; i <hypre_ParCSRCommPkgNumSends(comm_pkg) ; i++)
{
tmp_int = hypre_ParCSRCommPkgSendMapStarts(comm_pkg)[i+1] -
hypre_ParCSRCommPkgSendMapStarts(comm_pkg)[i];
index = hypre_ParCSRCommPkgSendMapStarts(comm_pkg)[i];
for (j=0; j< tmp_int; j++)
{
hypre_printf("myid = %d, std - send proc = %d, send element = %d\n",myid,
hypre_ParCSRCommPkgSendProcs(comm_pkg)[i],
hypre_ParCSRCommPkgSendMapElmts(comm_pkg)[index+j]);
}
}
#endif
}
/*-----------------------------------------------------------
* Verify correctness
*-----------------------------------------------------------*/
if (commpkg_flag == 3 )
{
global_num_rows = hypre_ParCSRMatrixGlobalNumRows(parcsr_A);
row_starts = hypre_ParCSRMatrixRowStarts(parcsr_A);
y = hypre_ParVectorCreate(hypre_MPI_COMM_WORLD, global_num_rows,row_starts);
hypre_ParVectorSetPartitioningOwner(y, 0);
hypre_ParVectorInitialize(y);
hypre_ParVectorSetConstantValues(y, 0.0);
hypre_ParCSRMatrixMatvec (1.0, parcsr_A, x_new, 1.0, y);
}
}
/*-----------------------------------------------------------
* Compare matvecs for both comm packages (3)
*-----------------------------------------------------------*/
if (commpkg_flag == 3 )
{
/*make sure that y and y_new are the same - now y_new should=0*/
hypre_ParVectorAxpy( -1.0, y, y_new );
hypre_ParVectorSetRandomValues(y, 1);
ans = hypre_ParVectorInnerProd( y, y_new );
if (!myid)
{
if ( fabs(ans) > 1e-8 )
{
hypre_printf("!!!!! WARNING !!!!! should be zero if correct = %6.10f\n",
ans);
}
else
{
hypre_printf("Matvecs match ( should be zero = %6.10f )\n",
ans);
}
}
}
/*-----------------------------------------------------------
* Clean up
*-----------------------------------------------------------*/
hypre_ParCSRMatrixDestroy(parcsr_A); /*this calls the standard comm
package destroy - but we'll destroy
ours separately until it is
incorporated */
if (commpkg_flag == 3 )
{
hypre_ParVectorDestroy(x_new);
hypre_ParVectorDestroy(y);
hypre_ParVectorDestroy(y_new);
}
hypre_MPI_Finalize();
return(ierr);
}
/*------------------------------------
* Calculate the average and STD
* throw away 1st timing
*------------------------------------*/
void stats_mo(double array[], HYPRE_Int n, double *Tavg,double *Tstd)
{
HYPRE_Int i;
double atmp, tmp=0.0;
double avg = 0.0, std;
for(i=1; i<n; i++) {
atmp = array[i];
avg += atmp;
tmp += atmp*atmp;
}
n = n-1;
avg = avg/(double) n;
tmp = tmp/(double) n;
tmp = fabs(tmp - avg*avg);
std = sqrt(tmp);
*Tavg = avg;
*Tstd = std;
}
/*These next two functions are from ij.c in linear_solvers/tests */
/*----------------------------------------------------------------------
* Build 27-point laplacian in 3D,
* Parameters given in command line.
*----------------------------------------------------------------------*/
HYPRE_Int
myBuildParLaplacian27pt( HYPRE_Int argc,
char *argv[],
HYPRE_Int arg_index,
HYPRE_ParCSRMatrix *A_ptr , HYPRE_Int parmprint )
{
HYPRE_Int nx, ny, nz;
HYPRE_Int P, Q, R;
HYPRE_ParCSRMatrix A;
HYPRE_Int num_procs, myid;
HYPRE_Int p, q, r;
double *values;
/*-----------------------------------------------------------
* Initialize some stuff
*-----------------------------------------------------------*/
hypre_MPI_Comm_size(hypre_MPI_COMM_WORLD, &num_procs );
hypre_MPI_Comm_rank(hypre_MPI_COMM_WORLD, &myid );
/*-----------------------------------------------------------
* Set defaults
*-----------------------------------------------------------*/
nx = 10;
ny = 10;
nz = 10;
P = 1;
Q = num_procs;
R = 1;
/*-----------------------------------------------------------
* Parse command line
*-----------------------------------------------------------*/
arg_index = 0;
while (arg_index < argc)
{
if ( strcmp(argv[arg_index], "-n") == 0 )
{
arg_index++;
nx = atoi(argv[arg_index++]);
ny = atoi(argv[arg_index++]);
nz = atoi(argv[arg_index++]);
}
else if ( strcmp(argv[arg_index], "-P") == 0 )
{
arg_index++;
P = atoi(argv[arg_index++]);
Q = atoi(argv[arg_index++]);
R = atoi(argv[arg_index++]);
}
else
{
arg_index++;
}
}
/*-----------------------------------------------------------
* Check a few things
*-----------------------------------------------------------*/
if ((P*Q*R) != num_procs)
{
hypre_printf("Error: Invalid number of processors or processor topology \n");
exit(1);
}
/*-----------------------------------------------------------
* Print driver parameters
*-----------------------------------------------------------*/
if (myid == 0 && parmprint)
{
hypre_printf(" Laplacian_27pt:\n");
hypre_printf(" (nx, ny, nz) = (%d, %d, %d)\n", nx, ny, nz);
hypre_printf(" (Px, Py, Pz) = (%d, %d, %d)\n\n", P, Q, R);
}
/*-----------------------------------------------------------
* Set up the grid structure
*-----------------------------------------------------------*/
/* compute p,q,r from P,Q,R and myid */
p = myid % P;
q = (( myid - p)/P) % Q;
r = ( myid - p - P*q)/( P*Q );
/*-----------------------------------------------------------
* Generate the matrix
*-----------------------------------------------------------*/
values = hypre_CTAlloc(double, 2);
values[0] = 26.0;
if (nx == 1 || ny == 1 || nz == 1)
values[0] = 8.0;
if (nx*ny == 1 || nx*nz == 1 || ny*nz == 1)
values[0] = 2.0;
values[1] = -1.;
A = (HYPRE_ParCSRMatrix) GenerateLaplacian27pt(hypre_MPI_COMM_WORLD,
nx, ny, nz, P, Q, R, p, q, r, values);
hypre_TFree(values);
*A_ptr = A;
return (0);
}
/*----------------------------------------------------------------------
* Build standard 7-point laplacian in 3D with grid and anisotropy.
* Parameters given in command line.
*----------------------------------------------------------------------*/
HYPRE_Int
myBuildParLaplacian( HYPRE_Int argc,
char *argv[],
HYPRE_Int arg_index,
HYPRE_ParCSRMatrix *A_ptr , HYPRE_Int parmprint )
{
HYPRE_Int nx, ny, nz;
HYPRE_Int P, Q, R;
double cx, cy, cz;
HYPRE_ParCSRMatrix A;
HYPRE_Int num_procs, myid;
HYPRE_Int p, q, r;
double *values;
/*-----------------------------------------------------------
* Initialize some stuff
*-----------------------------------------------------------*/
hypre_MPI_Comm_size(hypre_MPI_COMM_WORLD, &num_procs );
hypre_MPI_Comm_rank(hypre_MPI_COMM_WORLD, &myid );
/*-----------------------------------------------------------
* Set defaults
*-----------------------------------------------------------*/
nx = 10;
ny = 10;
nz = 10;
P = 1;
Q = num_procs;
R = 1;
cx = 1.;
cy = 1.;
cz = 1.;
/*-----------------------------------------------------------
* Parse command line
*-----------------------------------------------------------*/
arg_index = 0;
while (arg_index < argc)
{
if ( strcmp(argv[arg_index], "-n") == 0 )
{
arg_index++;
nx = atoi(argv[arg_index++]);
ny = atoi(argv[arg_index++]);
nz = atoi(argv[arg_index++]);
}
else if ( strcmp(argv[arg_index], "-P") == 0 )
{
arg_index++;
P = atoi(argv[arg_index++]);
Q = atoi(argv[arg_index++]);
R = atoi(argv[arg_index++]);
}
else if ( strcmp(argv[arg_index], "-c") == 0 )
{
arg_index++;
cx = atof(argv[arg_index++]);
cy = atof(argv[arg_index++]);
cz = atof(argv[arg_index++]);
}
else
{
arg_index++;
}
}
/*-----------------------------------------------------------
* Check a few things
*-----------------------------------------------------------*/
if ((P*Q*R) != num_procs)
{
hypre_printf("Error: Invalid number of processors or processor topology \n");
exit(1);
}
/*-----------------------------------------------------------
* Print driver parameters
*-----------------------------------------------------------*/
if (myid == 0 && parmprint)
{
hypre_printf(" Laplacian:\n");
hypre_printf(" (nx, ny, nz) = (%d, %d, %d)\n", nx, ny, nz);
hypre_printf(" (Px, Py, Pz) = (%d, %d, %d)\n", P, Q, R);
hypre_printf(" (cx, cy, cz) = (%f, %f, %f)\n\n", cx, cy, cz);
}
/*-----------------------------------------------------------
* Set up the grid structure
*-----------------------------------------------------------*/
/* compute p,q,r from P,Q,R and myid */
p = myid % P;
q = (( myid - p)/P) % Q;
r = ( myid - p - P*q)/( P*Q );
/*-----------------------------------------------------------
* Generate the matrix
*-----------------------------------------------------------*/
values = hypre_CTAlloc(double, 4);
values[1] = -cx;
values[2] = -cy;
values[3] = -cz;
values[0] = 0.;
if (nx > 1)
{
values[0] += 2.0*cx;
}
if (ny > 1)
{
values[0] += 2.0*cy;
}
if (nz > 1)
{
values[0] += 2.0*cz;
}
A = (HYPRE_ParCSRMatrix) GenerateLaplacian(hypre_MPI_COMM_WORLD, nx, ny, nz,
P, Q, R, p, q, r, values);
hypre_TFree(values);
*A_ptr = A;
return (0);
}
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