LCPQ
/
DEHam
mirror of https://github.com/LCPQ/DEHam
2
0
Fork 0
Code Issues Releases Wiki Activity
DEHam/src/ex1.c

213 lines
7.4 KiB
C
Raw Blame History

#include <slepceps.h>
#include <petsctime.h>
#include "stimsyr.h"
#include "read2.h"
#undef __FUNCT__
#define __FUNCT__ "main"
int main(int argc,char **argv)
{
Mat A; /* problem matrix */
EPS eps; /* eigenproblem solver context */
EPSType type;
PetscReal error,tol,re,im;
PetscScalar kr,ki,value[700];
Vec xr,xi;
PetscInt i,Istart,Iend,col[700],maxit,its,nconv,countcol;
PetscInt nev, ncv, mpd;
PetscLogDouble t1,t2,tt1,tt2;
//PetscBool FirstBlock=PETSC_FALSE,LastBlock=PETSC_FALSE;
PetscErrorCode ierr;
//PetscScalar eigr;
//PetscScalar eigi;
int mpiid;
char const* const fileName = argv[1];
FILE* file = fopen(fileName, "r");
Data getdata;
Data_new(file, &getdata);
//printf("n=%ld\t nnz=%ld\t npar=%ld\t ntrou=%ld\t isz=%ld\n",getdata.n,getdata.nnz,getdata.npar,getdata.ntrou,getdata.isz);
//Vec Vr,Vi;
char filename[PETSC_MAX_PATH_LEN]="FIL666";
PetscViewer viewer;
PetscBool ishermitian;
PetscInt kk,ll,iii2;
long int iii;
long int tcountcol2,tcol[700],tcountcol[getdata.nnz];
double val[700];
SlepcInitialize(&argc,&argv,(char*)0,NULL);
ierr = PetscPrintf(PETSC_COMM_WORLD,"\n1-D t-J Eigenproblem, n=%D\n\n",getdata.n);CHKERRQ(ierr);
ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr);
ierr = MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,getdata.n,getdata.n,getdata.nnz*getdata.npar,NULL,getdata.nnz*getdata.npar,NULL,&A);CHKERRQ(ierr);
ierr = MatMPIAIJSetPreallocation(A,getdata.nnz*getdata.npar,NULL,getdata.nnz*getdata.npar,NULL);CHKERRQ(ierr);
//ierr = MatSetFromOptions(A);CHKERRQ(ierr);
//ierr = MatSetUp(A);CHKERRQ(ierr);
MPI_Comm_rank(MPI_COMM_WORLD,&mpiid);
ierr = MatGetOwnershipRange(A,&Istart,&Iend);CHKERRQ(ierr);
ierr = PetscTime(&tt1);CHKERRQ(ierr);
for (i=Istart; i<Iend; i+=getdata.nnz) {
tcountcol2=0;
for(kk=0;kk<getdata.nnz;kk++){
tcountcol[kk]=0;
}
iii=i+1;
if(i%getdata.npar == 0 && mpiid==0){
ierr = PetscTime(&t1);CHKERRQ(ierr);
}
unit_l1_(
getdata.l1,
getdata.l2,
getdata.ktyp,
&iii,
&getdata.nnz,
getdata.xjjxy,
getdata.xjjz ,
getdata.xtt ,
tcountcol,
&getdata.ntrou,
&getdata.isz,
tcol,
val);
if(i%getdata.npar == 0 && mpiid==0){
ierr = PetscTime(&t2);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," i: %d\n mpiid: %d\ntime: %f\n",i,mpiid,t2-t1);CHKERRQ(ierr);
}
for(ll=0;ll<getdata.nnz;ll++){
for(kk=0;kk<tcountcol[ll]+1;kk++){
value[kk] = val[kk+tcountcol2];
col[kk] = tcol[kk+tcountcol2]-1;
// PetscPrintf(PETSC_COMM_WORLD,"value = %f col = %d\n",value[kk],col[kk]);
}
for(kk=tcountcol2+tcountcol[ll]+1;kk<700;kk++){
value[kk] = 0.0;
col[kk] = 0;
}
tcountcol2=tcountcol2 + tcountcol[ll]+1;
countcol=tcountcol[ll]+1;
if(i%getdata.npar == 0 && mpiid==0){
ierr = PetscTime(&t1);CHKERRQ(ierr);
}
iii2=i+ll;
ierr = MatSetValues(A,1,&iii2,countcol,col,value,INSERT_VALUES);CHKERRQ(ierr);
if(i%getdata.npar == 0 && mpiid==0){
ierr = PetscTime(&t2);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," processor \ntime: %f\n",t2-t1);CHKERRQ(ierr);
}
}
}
ierr = PetscTime(&tt2);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," Time used to build the matrix: %f\n",tt2-tt1);CHKERRQ(ierr);
ierr = PetscTime(&tt1);CHKERRQ(ierr);
ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
ierr = PetscTime(&tt2);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," Time used to assemble the matrix: %f\n",tt2-tt1);CHKERRQ(ierr);
//ierr = MatGetVecs(A,NULL,&xr);CHKERRQ(ierr);
//ierr = MatGetVecs(A,NULL,&xi);CHKERRQ(ierr);
ierr = MatCreateVecs(A,NULL,&xr);CHKERRQ(ierr);
ierr = MatCreateVecs(A,NULL,&xi);CHKERRQ(ierr);
ierr = EPSCreate(PETSC_COMM_WORLD,&eps);CHKERRQ(ierr);
ierr = EPSSetOperators(eps,A,NULL);CHKERRQ(ierr);
ierr = EPSSetProblemType(eps,EPS_HEP);CHKERRQ(ierr);
ierr = EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL);CHKERRQ(ierr);
ierr = EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL);CHKERRQ(ierr);
ierr = EPSSetFromOptions(eps);CHKERRQ(ierr);
tol = 1.e-8;
maxit = 10000000;
ierr = EPSSetTolerances(eps,tol,maxit);CHKERRQ(ierr);
nev = 4;
ncv = 10;
mpd = 10;
ierr = EPSSetDimensions(eps,nev,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr);
ierr = PetscTime(&t1);CHKERRQ(ierr);
ierr = EPSSolve(eps);CHKERRQ(ierr);
ierr = PetscTime(&t2);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," Time used: %f\n",t2-t1);CHKERRQ(ierr);
ierr = EPSGetIterationNumber(eps,&its);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," Number of iterations of the method: %D\n",its);CHKERRQ(ierr);
ierr = EPSGetType(eps,&type);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," Solution method: %s\n\n",type);CHKERRQ(ierr);
ierr = EPSGetDimensions(eps,&nev,NULL,NULL);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," Number of requested eigenvalues: %D\n",nev);CHKERRQ(ierr);
ierr = EPSGetTolerances(eps,&tol,&maxit);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," Stopping condition: tol=%.4g, maxit=%D\n",(double)tol,maxit);CHKERRQ(ierr);
ierr = EPSGetConverged(eps,&nconv);CHKERRQ(ierr);
//ierr = EPSPrintSolution(eps,NULL);CHKERRQ(ierr);
if (nconv>0) {
/*
Display eigenvalues and relative errors
*/
ierr = PetscPrintf(PETSC_COMM_WORLD,
" k ||Ax-kx||/||kx||\n"
" ----------------- ------------------\n");CHKERRQ(ierr);
for (i=0;i<nconv;i++) {
/*
Get converged eigenpairs: i-th eigenvalue is stored in kr (real part) and
ki (imaginary part)
*/
ierr = EPSGetEigenpair(eps,i,&kr,&ki,xr,xi);CHKERRQ(ierr);
/*
Compute the relative error associated to each eigenpair
*/
ierr = EPSComputeError(eps,i,EPS_ERROR_RELATIVE,&error);CHKERRQ(ierr);
#if defined(PETSC_USE_COMPLEX)
re = PetscRealPart(kr);
im = PetscImaginaryPart(kr);
#else
re = kr;
im = ki;
#endif
if (im!=0.0) {
ierr = PetscPrintf(PETSC_COMM_WORLD," %14f%+14fi %12g\n",(double)re,(double)im,(double)error);CHKERRQ(ierr);
} else {
ierr = PetscPrintf(PETSC_COMM_WORLD," %18f %12g\n",(double)re,(double)error);CHKERRQ(ierr);
}
}
ierr = PetscPrintf(PETSC_COMM_WORLD,"\n");CHKERRQ(ierr);
}
/*
Save eigenvectors, if requested
*/
//PetscOptionsGetString(NULL,NULL,"-evecs",filename,PETSC_MAX_PATH_LEN,&evecs);
EPSGetConverged(eps,&nconv);
if (nconv>0) {
PetscViewerASCIIOpen(PETSC_COMM_WORLD,filename,&viewer);
PetscViewerSetFormat(viewer,PETSC_VIEWER_ASCII_MATLAB);
PetscViewerSetFormat(viewer,PETSC_VIEWER_ASCII_SYMMODU);
EPSIsHermitian(eps,&ishermitian);
for (i=0;i<nconv;i++) {
EPSGetEigenvector(eps,i,xr,xi);
VecView(xr,viewer);
#if !defined(PETSC_USE_COMPLEX)
if (!ishermitian) { VecView(xi,viewer); }
#endif
}
PetscViewerDestroy(&viewer);
}
ierr = EPSDestroy(&eps);CHKERRQ(ierr);
ierr = MatDestroy(&A);CHKERRQ(ierr);
ierr = VecDestroy(&xr);CHKERRQ(ierr);
ierr = VecDestroy(&xi);CHKERRQ(ierr);
ierr = SlepcFinalize();
return 0;
}
Reference in New Issue View Git Blame Copy Permalink