nouvelle preuve

[GMRES2stage.git] / code / ex45.c

diff --git a/code/ex45.c b/code/ex45.c
index dd3f3a6ac478800f9d135c85072a1c8823e2148f..d3e5fb426ddf1f59f735f93f5b71c3bdb066229f 100644 (file)
--- a/code/ex45.c
+++ b/code/ex45.c
@@ -45,7 +45,7 @@ int KrylovMinimize(Mat A, Vec b, Vec x) {
 
   PetscScalar  gamma, alpha, oldgamma, beta;
   PetscReal norm=20, Eprecision=1e-8, cgprec=1e-40;     
-  PetscInt giter=0, ColS=12, col=0, Emaxiter=50000000, iter=0, iterations=15, Iiter=0;
+  PetscInt giter=0, ColS=6, col=0, Emaxiter=50000000, iter=0, iterations=15, Iiter=0;
   PetscErrorCode ierr;
   PetscScalar T1, T2;
   KSP ksp;
@@ -108,13 +108,14 @@ int KrylovMinimize(Mat A, Vec b, Vec x) {
 
   //Initializations
   //  ierr = KSPGMRESSetRestart(ksp, 16); CHKERRQ(ierr);
-  ierr = KSPSetTolerances(ksp, 1e-13, 1e-13, PETSC_DEFAULT, 16); CHKERRQ(ierr);
+  ierr = KSPSetTolerances(ksp, 1e-13, 1e-13, PETSC_DEFAULT, 30); CHKERRQ(ierr);
   ierr = KSPSetInitialGuessNonzero(ksp, PETSC_TRUE); CHKERRQ(ierr);
 
 
 
   //GMRES WITH MINIMIZATION
   T1 = MPI_Wtime();
+  ierr = KSPSetUp(ksp);CHKERRQ(ierr);
   while(giter<Emaxiter && norm>Eprecision ){
     for(col=0; col<ColS  &&  norm>Eprecision; col++){
 
@@ -221,7 +222,7 @@ int KrylovMinimizeLSQR(Mat A, Vec b, Vec x) {
 
   PetscScalar  alpha, beta;
   PetscReal norm=20, Eprecision=1e-8, tol=1e-40;     
-  PetscInt giter=0, ColS=12, col=0, Emaxiter=50000000, iter=0, iterations=15, Iiter=0;
+  PetscInt giter=0, ColS=6, col=0, Emaxiter=50000000, iter=0, iterations=15, Iiter=0;
   PetscErrorCode ierr;
   PetscScalar T1, T2;
   KSP ksp;
@@ -297,7 +298,7 @@ int KrylovMinimizeLSQR(Mat A, Vec b, Vec x) {
 
   //Initializations
   //  ierr = KSPGMRESSetRestart(ksp, 16); CHKERRQ(ierr);
-  ierr = KSPSetTolerances(ksp, 1e-13, 1e-13, PETSC_DEFAULT, 16); CHKERRQ(ierr);
+  ierr = KSPSetTolerances(ksp, 1e-13, 1e-13, PETSC_DEFAULT, 30); CHKERRQ(ierr);
   ierr = KSPSetInitialGuessNonzero(ksp, PETSC_TRUE); CHKERRQ(ierr);
 
 
@@ -305,6 +306,7 @@ int KrylovMinimizeLSQR(Mat A, Vec b, Vec x) {
 
   //GMRES WITH MINIMIZATION
   T1 = MPI_Wtime();
+  ierr = KSPSetUp(ksp);CHKERRQ(ierr);
   while(giter<Emaxiter && norm>Eprecision ){
     for(col=0; col<ColS  &&  norm>Eprecision; col++){
 
@@ -466,8 +468,22 @@ int main(int argc,char **argv)
   ierr = KSPSetFromOptions(ksp);CHKERRQ(ierr);
 
 
+
+  PC             pc;
+  ierr = KSPSetFromOptions(ksp);CHKERRQ(ierr);
+  KSPGetPC(ksp, &pc);
+  PCType         type;
+  PCGetType(pc, &type);
+
+  PetscPrintf(PETSC_COMM_WORLD, "PC TYPE %s  \n", type);
+  KSPGetType(ksp,&type);
+  PetscPrintf(PETSC_COMM_WORLD, "SOLVER TYPE %s  \n", type);
+
+
+
   ierr = KSPSetTolerances(ksp, 1e-10, 1e-10, PETSC_DEFAULT, 50000000); CHKERRQ(ierr);
   T1 = MPI_Wtime();
+  ierr = KSPSetUp(ksp);CHKERRQ(ierr);
   ierr = KSPSolve(ksp,NULL,NULL);CHKERRQ(ierr);
   T2 = MPI_Wtime();