• 设为首页
  • 点击收藏
  • 手机版
    手机扫一扫访问
    迪恩网络手机版
  • 关注官方公众号
    微信扫一扫关注
    公众号
登陆 注册

C++ PCSetType函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中PCSetType函数的典型用法代码示例。如果您正苦于以下问题：C++ PCSetType函数的具体用法？C++ PCSetType怎么用？C++ PCSetType使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了PCSetType函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: STSetFromOptions_Shell

PetscErrorCode STSetFromOptions_Shell(ST st)
{
  PetscErrorCode ierr;
  PC             pc;
  PCType         pctype;
  KSPType        ksptype;

  PetscFunctionBegin;
  if (!st->ksp) { ierr = STGetKSP(st,&st->ksp);CHKERRQ(ierr); }
  ierr = KSPGetPC(st->ksp,&pc);CHKERRQ(ierr);
  ierr = KSPGetType(st->ksp,&ksptype);CHKERRQ(ierr);
  ierr = PCGetType(pc,&pctype);CHKERRQ(ierr);
  if (!pctype && !ksptype) {
    if (st->shift_matrix == ST_MATMODE_SHELL) {
      /* in shell mode use GMRES with Jacobi as the default */
      ierr = KSPSetType(st->ksp,KSPGMRES);CHKERRQ(ierr);
      ierr = PCSetType(pc,PCJACOBI);CHKERRQ(ierr);
    } else {
      /* use direct solver as default */
      ierr = KSPSetType(st->ksp,KSPPREONLY);CHKERRQ(ierr);
      ierr = PCSetType(pc,PCREDUNDANT);CHKERRQ(ierr);
    }
  }
  PetscFunctionReturn(0);
}
开发者ID:OpenCMISS-Dependencies，项目名称:slepc，代码行数:25，代码来源:shell.c


示例2: PCBDDCScalingSetUp_Deluxe_Private

static PetscErrorCode PCBDDCScalingSetUp_Deluxe_Private(PC pc)
{
  PC_BDDC                *pcbddc=(PC_BDDC*)pc->data;
  PCBDDCDeluxeScaling    deluxe_ctx=pcbddc->deluxe_ctx;
  PCBDDCSubSchurs        sub_schurs = pcbddc->sub_schurs;
  PetscErrorCode         ierr;

  PetscFunctionBegin;
  if (!sub_schurs->n_subs) {
    PetscFunctionReturn(0);
  }

  /* Create work vectors for sequential part of deluxe */
  ierr = MatCreateVecs(sub_schurs->S_Ej_all,&deluxe_ctx->seq_work1,&deluxe_ctx->seq_work2);CHKERRQ(ierr);

  /* Compute deluxe sequential scatter */
  if (sub_schurs->reuse_mumps && !sub_schurs->is_dir) {
    PCBDDCReuseMumps reuse_mumps = sub_schurs->reuse_mumps;
    ierr = PetscObjectReference((PetscObject)reuse_mumps->correction_scatter_B);CHKERRQ(ierr);
    deluxe_ctx->seq_scctx = reuse_mumps->correction_scatter_B;
  } else {
    ierr = VecScatterCreate(pcbddc->work_scaling,sub_schurs->is_Ej_all,deluxe_ctx->seq_work1,NULL,&deluxe_ctx->seq_scctx);CHKERRQ(ierr);
  }

  /* Create Mat object for deluxe scaling */
  ierr = PetscObjectReference((PetscObject)sub_schurs->S_Ej_all);CHKERRQ(ierr);
  deluxe_ctx->seq_mat = sub_schurs->S_Ej_all;
  if (sub_schurs->sum_S_Ej_all) { /* if this matrix is present, then we need to create the KSP object to invert it */
    PC               pc_temp;
    MatSolverPackage solver=NULL;
    char             ksp_prefix[256];
    size_t           len;

    ierr = KSPCreate(PETSC_COMM_SELF,&deluxe_ctx->seq_ksp);CHKERRQ(ierr);
    ierr = KSPSetOperators(deluxe_ctx->seq_ksp,sub_schurs->sum_S_Ej_all,sub_schurs->sum_S_Ej_all);CHKERRQ(ierr);
    ierr = KSPSetType(deluxe_ctx->seq_ksp,KSPPREONLY);CHKERRQ(ierr);
    ierr = KSPGetPC(deluxe_ctx->seq_ksp,&pc_temp);CHKERRQ(ierr);
    ierr = PCSetType(pc_temp,PCLU);CHKERRQ(ierr);
    ierr = KSPGetPC(pcbddc->ksp_D,&pc_temp);CHKERRQ(ierr);
    ierr = PCFactorGetMatSolverPackage(pc_temp,(const MatSolverPackage*)&solver);CHKERRQ(ierr);
    if (solver) {
      PC     new_pc;
      PCType type;

      ierr = PCGetType(pc_temp,&type);CHKERRQ(ierr);
      ierr = KSPGetPC(deluxe_ctx->seq_ksp,&new_pc);CHKERRQ(ierr);
      ierr = PCSetType(new_pc,type);CHKERRQ(ierr);
      ierr = PCFactorSetMatSolverPackage(new_pc,solver);CHKERRQ(ierr);
    }
    ierr = PetscStrlen(((PetscObject)(pcbddc->ksp_D))->prefix,&len);CHKERRQ(ierr);
    len -= 10; /* remove "dirichlet_" */
    ierr = PetscStrncpy(ksp_prefix,((PetscObject)(pcbddc->ksp_D))->prefix,len+1);CHKERRQ(ierr);
    ierr = PetscStrcat(ksp_prefix,"deluxe_");CHKERRQ(ierr);
    ierr = KSPSetOptionsPrefix(deluxe_ctx->seq_ksp,ksp_prefix);CHKERRQ(ierr);
    ierr = KSPSetFromOptions(deluxe_ctx->seq_ksp);CHKERRQ(ierr);
    ierr = KSPSetUp(deluxe_ctx->seq_ksp);CHKERRQ(ierr);
  }
  PetscFunctionReturn(0);
}
开发者ID:masa-ito，项目名称:PETScToPoisson，代码行数:59，代码来源:bddcscalingbasic.c


示例3: MultigridSolver_CreateCoarseSolver

MGSolver_PETScData* MultigridSolver_CreateCoarseSolver( MultigridSolver* self, Mat matrix ) {
	//MatrixSolver*	coarseSolver;
	MGSolver_PETScData* courseSolver;
	unsigned	nProcs;
	PC		pc;

	MPI_Comm_size( self->mgData->comm, (int*)&nProcs );

	/*
	coarseSolver = (MatrixSolver*)PETScMatrixSolver_New( "" );
	PETScMatrixSolver_SetKSPType( coarseSolver, 
				      PETScMatrixSolver_KSPType_PreOnly );
	if( nProcs == 1 ) {
		PETScMatrixSolver_SetPCType( coarseSolver, 
					     PETScMatrixSolver_PCType_LU );
	}
	else {
		PETScMatrixSolver_SetPCType( coarseSolver, 
					     PETScMatrixSolver_PCType_RedundantLU );
	}
	MatrixSolver_SetMatrix( coarseSolver, matrix );
	*/
	
	if( nProcs == 1 ){
	    KSPCreate( MPI_COMM_WORLD, &courseSolver->ksp );
	    KSPSetType( courseSolver->ksp, KSPPREONLY );
	    KSPGetPC( courseSolver->ksp, &pc );
	    PCSetType( pc, PCLU );
	}
	else {
		PCSetType( pc, PCREDUNDANT );
		#if ((PETSC_VERSION_MAJOR>=3) && (PETSC_VERSION_MINOR>=2) )
		PCCreate( MPI_COMM_WORLD, &pc);
		PCRedundantGetKSP( pc, &courseSolver->ksp );
		#else
		KSPCreate( MPI_COMM_WORLD, &courseSolver->ksp );
		KSPSetType( courseSolver->ksp, KSPPREONLY );
		KSPGetPC( courseSolver->ksp, &pc );
		PCRedundantGetPC( pc, &pc );
                #endif
		PCSetType( pc, PCLU );
	}
        if( courseSolver->matrix != PETSC_NULL ){
	    Stg_MatDestroy(&courseSolver->matrix );}

	courseSolver->matrix = matrix;
	Stg_KSPSetOperators( courseSolver->ksp, matrix, matrix, DIFFERENT_NONZERO_PATTERN );

	return courseSolver;
}
开发者ID:OlympusMonds，项目名称:EarthByte_Underworld，代码行数:50，代码来源:MultigridSolver.c


示例4: PCRedundantGetKSP_Redundant

static PetscErrorCode  PCRedundantGetKSP_Redundant(PC pc,KSP *innerksp)
{
  PetscErrorCode ierr;
  PC_Redundant   *red = (PC_Redundant*)pc->data;
  MPI_Comm       comm,subcomm;
  const char     *prefix;

  PetscFunctionBegin;
  if (!red->psubcomm) {
    ierr = PetscObjectGetComm((PetscObject)pc,&comm);CHKERRQ(ierr);
    ierr = PetscSubcommCreate(comm,&red->psubcomm);CHKERRQ(ierr);
    ierr = PetscSubcommSetNumber(red->psubcomm,red->nsubcomm);CHKERRQ(ierr);
    ierr = PetscSubcommSetType(red->psubcomm,PETSC_SUBCOMM_INTERLACED);CHKERRQ(ierr);
    ierr = PetscLogObjectMemory((PetscObject)pc,sizeof(PetscSubcomm));CHKERRQ(ierr);

    /* create a new PC that processors in each subcomm have copy of */
    subcomm = PetscSubcommChild(red->psubcomm);

    ierr = KSPCreate(subcomm,&red->ksp);CHKERRQ(ierr);
    ierr = KSPSetErrorIfNotConverged(red->ksp,pc->erroriffailure);CHKERRQ(ierr);
    ierr = PetscObjectIncrementTabLevel((PetscObject)red->ksp,(PetscObject)pc,1);CHKERRQ(ierr);
    ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)red->ksp);CHKERRQ(ierr);
    ierr = KSPSetType(red->ksp,KSPPREONLY);CHKERRQ(ierr);
    ierr = KSPGetPC(red->ksp,&red->pc);CHKERRQ(ierr);
    ierr = PCSetType(red->pc,PCLU);CHKERRQ(ierr);

    ierr = PCGetOptionsPrefix(pc,&prefix);CHKERRQ(ierr);
    ierr = KSPSetOptionsPrefix(red->ksp,prefix);CHKERRQ(ierr);
    ierr = KSPAppendOptionsPrefix(red->ksp,"redundant_");CHKERRQ(ierr);
  }
  *innerksp = red->ksp;
  PetscFunctionReturn(0);
}
开发者ID:plguhur，项目名称:petsc，代码行数:33，代码来源:redundant.c


示例5: START_TEST

END_TEST

START_TEST( Generate2DLapacian_test )
{
  PetscErrorCode ierr;
  PetscInt d = 50, len = d*d;
  Mat m;
  PetscViewer view;
  Generate2DLapacian( d, d, &m);
  
  PetscViewerASCIIOpen(PETSC_COMM_SELF, "mat.dat", &view);
  MatView(m, view);
  
  KSP ksp;
  PC pc;
  ierr = KSPCreate(PETSC_COMM_SELF, &ksp); CHKERRQ(ierr);
  KSPSetType(ksp, KSPPREONLY);
  KSPGetPC(ksp, &pc);
  PCSetType(pc, PCCHOLESKY);
  KSPSetOperators(ksp, m, m, SAME_PRECONDITIONER);
  Vec v, s;
  VecCreateSeq(PETSC_COMM_SELF,len,&v);
  VecDuplicate(v, &s);
  VecSet(v, 1);
  ierr = KSPSolve(ksp, v, s); CHKERRQ(ierr);
  
}
开发者ID:adrielb，项目名称:DCell，代码行数:27，代码来源:check.c


示例6: StokesSetupPC

PetscErrorCode StokesSetupPC(Stokes *s, KSP ksp)
{
  KSP            *subksp;
  PC             pc, pc1;
  PetscInt       n = 1;
  PetscErrorCode ierr;

  PetscFunctionBeginUser;
  ierr = KSPGetPC(ksp, &pc);CHKERRQ(ierr);
  ierr = PCFieldSplitSetIS(pc, "0", s->isg[0]);CHKERRQ(ierr);
  ierr = PCFieldSplitSetIS(pc, "1", s->isg[1]);CHKERRQ(ierr);
  if (s->userPC) {
    ierr = PCFieldSplitSetSchurPre(pc, PC_FIELDSPLIT_SCHUR_PRE_USER, s->myS);CHKERRQ(ierr);
  }
  if (s->userKSP) {
    ierr = PCSetUp(pc);CHKERRQ(ierr);
    ierr = PCFieldSplitGetSubKSP(pc, &n, &subksp);CHKERRQ(ierr);
    ierr = KSPSetOperators(subksp[1], s->myS, s->myS);CHKERRQ(ierr);
   
    ierr = KSPGetPC(subksp[1], &pc1);CHKERRQ(ierr);
    ierr = PCSetUp(pc1);CHKERRQ(ierr);
    ierr = PCSetType(pc1,PCGAMG);CHKERRQ(ierr);
    ierr = PetscFree(subksp);CHKERRQ(ierr);
  }
  PetscFunctionReturn(0);
}
开发者ID:FeMTTU，项目名称:femus，代码行数:26，代码来源:ex6.cpp


示例7: MGinit

    void MGinit( const MgSmootherType &mg_smoother_type, const unsigned &levelMax ){

      KSPCreate(PETSC_COMM_WORLD,&_ksp);

      KSPGetPC(_ksp,&_pc);
      PCSetType(_pc,PCMG);
      PCMGSetLevels(_pc,levelMax,NULL);

      if( mg_smoother_type == FULL ){
        PCMGSetType(_pc, PC_MG_FULL);
      }
      else if( mg_smoother_type == MULTIPLICATIVE ){
        PCMGSetType(_pc, PC_MG_MULTIPLICATIVE);
      }
      else if( mg_smoother_type == ADDITIVE ){
        PCMGSetType(_pc, PC_MG_ADDITIVE);
      }
      else if( mg_smoother_type == KASKADE ){
        PCMGSetType(_pc, PC_MG_KASKADE);
      }
      else{
        std::cout <<"Wrong mg_type for PETSCsolve()"<<std::endl;
        abort();
      }
    };
开发者ID:CasaNostra，项目名称:femus，代码行数:25，代码来源:FieldSplitPetscLinearEquationSolver.hpp


示例8: MultigridSolver_CreateSmoother

MGSolver_PETScData* MultigridSolver_CreateSmoother( MultigridSolver* self, Mat matrix ) {
	//MatrixSolver*	smoother;
	MGSolver_PETScData* smoother = malloc( sizeof( MGSolver_PETScData ) );
	//unsigned	nBlocks;
	//KSP*		ksps;
	PC		pc;
	//PetscErrorCode	ec;

	/*
	smoother = (MatrixSolver*)PETScMatrixSolver_New( "" );
	PETScMatrixSolver_SetKSPType( smoother, 
				      PETScMatrixSolver_KSPType_Richardson );
	PETScMatrixSolver_SetPCType( smoother, 
				     PETScMatrixSolver_PCType_SOR );
	MatrixSolver_SetMatrix( smoother, matrix );
	*/
	KSPCreate( MPI_COMM_WORLD, &smoother->ksp );
	KSPSetType( smoother->ksp, KSPRICHARDSON );
	KSPGetPC( smoother->ksp, &pc );
	PCSetType( pc, PCSOR );
	if( smoother->matrix != PETSC_NULL )
		Stg_MatDestroy(&smoother->matrix );
	smoother->matrix = matrix;
	Stg_KSPSetOperators( smoother->ksp, matrix, matrix, DIFFERENT_NONZERO_PATTERN );

	return smoother;
}
开发者ID:OlympusMonds，项目名称:EarthByte_Underworld，代码行数:27，代码来源:MultigridSolver.c


示例9: MultigridSolver_CreateOuterSolver

MGSolver_PETScData* MultigridSolver_CreateOuterSolver( MultigridSolver* self, Mat matrix ) {
	//MatrixSolver*	outerSolver;
	MGSolver_PETScData* 	outerSolver = malloc( sizeof(MGSolver_PETScData) );
	PC			pc;

	/*
	outerSolver = (MatrixSolver*)PETScMatrixSolver_New( "" );
	PETScMatrixSolver_SetKSPType( outerSolver, PETScMatrixSolver_KSPType_Richardson );
	PETScMatrixSolver_SetPCType( outerSolver, PETScMatrixSolver_PCType_SOR );
	PETScMatrixSolver_SetMatrix( outerSolver, matrix );
	PETScMatrixSolver_SetMaxIterations( outerSolver, 3 );
	PETScMatrixSolver_SetUseInitialSolution( outerSolver, True );
	PETScMatrixSolver_SetNormType( outerSolver, PETScMatrixSolver_NormType_Preconditioned );
	*/
	KSPCreate( MPI_COMM_WORLD, &outerSolver->ksp );
	KSPSetType( outerSolver->ksp, KSPRICHARDSON );
	KSPGetPC( outerSolver->ksp, &pc );
	PCSetType( pc, PCSOR );
	if( outerSolver->matrix != PETSC_NULL )
		Stg_MatDestroy(&outerSolver->matrix );
	outerSolver->matrix = matrix;
	Stg_KSPSetOperators( outerSolver->ksp, matrix, matrix, DIFFERENT_NONZERO_PATTERN );
	KSPSetTolerances( outerSolver->ksp, PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT, (PetscInt)3 );
	KSPSetInitialGuessNonzero( outerSolver->ksp, (PetscTruth)True );
	KSPSetNormType( outerSolver->ksp, MultigridSolver_NormType_Preconditioned );

	return outerSolver;
}
开发者ID:OlympusMonds，项目名称:EarthByte_Underworld，代码行数:28，代码来源:MultigridSolver.c


示例10: main

int main(int argc,char **args)
{
    PC             pc;
    PetscErrorCode ierr;
    PetscInt       n = 5;
    Mat            mat;

    ierr = PetscInitialize(&argc,&args,(char*)0,help);
    if (ierr) return ierr;
    ierr = PCCreate(PETSC_COMM_WORLD,&pc);
    CHKERRQ(ierr);
    ierr = PCSetType(pc,PCNONE);
    CHKERRQ(ierr);

    /* Vector and matrix must be set before calling PCSetUp */
    ierr = MatCreateSeqAIJ(PETSC_COMM_SELF,n,n,3,NULL,&mat);
    CHKERRQ(ierr);
    ierr = MatAssemblyBegin(mat,MAT_FINAL_ASSEMBLY);
    CHKERRQ(ierr);
    ierr = MatAssemblyEnd(mat,MAT_FINAL_ASSEMBLY);
    CHKERRQ(ierr);
    ierr = PCSetOperators(pc,mat,mat);
    CHKERRQ(ierr);
    ierr = PCSetUp(pc);
    CHKERRQ(ierr);
    ierr = MatDestroy(&mat);
    CHKERRQ(ierr);
    ierr = PCDestroy(&pc);
    CHKERRQ(ierr);
    ierr = PetscFinalize();
    return ierr;
}
开发者ID:petsc，项目名称:petsc，代码行数:32，代码来源:ex1.c


示例11: SolvePressure

PetscErrorCode SolvePressure(UserContext *uc)
{
  PetscErrorCode ierr;
  
  PetscFunctionBegin;
  PetscLogEventBegin(EVENT_SolvePressure,0,0,0,0);

  ierr = KSPCreate(PETSC_COMM_WORLD, &uc->ksp); CHKERRQ(ierr);
  ierr = KSPSetType(uc->ksp,KSPCG); CHKERRQ(ierr);
  ierr = KSPSetOperators(uc->ksp,uc->A,uc->A,SAME_NONZERO_PATTERN); CHKERRQ(ierr);
  ierr = KSPSetFromOptions(uc->ksp); CHKERRQ(ierr);
  ierr = KSPSetTolerances(uc->ksp, 0.000001, PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT); CHKERRQ(ierr);
  
  ierr = KSPSetType( uc->ksp, KSPPREONLY); CHKERRQ(ierr);
  PC pc;
  ierr = KSPGetPC(uc->ksp, &pc); CHKERRQ(ierr);
  ierr = PCSetType(pc, PCLU); CHKERRQ(ierr);
  
  ierr = KSPSolve(uc->ksp,uc->b,uc->p);CHKERRQ(ierr);
  
  KSPConvergedReason reason;
  KSPGetConvergedReason(uc->ksp,&reason);
  PetscPrintf(PETSC_COMM_WORLD,"Pressure KSPConvergedReason: %D\n", reason);
  // if( reason < 0 )    SETERRQ(PETSC_ERR_CONV_FAILED, "Exiting: Failed to converge\n");
  
  PetscLogEventEnd(EVENT_SolvePressure,0,0,0,0);
  PetscFunctionReturn(0);
}
开发者ID:adrielb，项目名称:DCell，代码行数:28，代码来源:PressurePoisson.c


示例12: MatAssemblyBegin

void PETSc::Solve_LSQR(void)
{
        
  //start_clock("Before Assemble matrix and vector");
	ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
  	ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
  	
  	ierr = VecAssemblyBegin(x);
  	ierr = VecAssemblyEnd(x);
  	
  	ierr = VecAssemblyBegin(b);
  	ierr = VecAssemblyEnd(b);
	//stop_clock("After Assembly matrix and vector");


        KSPSetOperators(ksp,A,A,DIFFERENT_NONZERO_PATTERN);
	KSPSetType(ksp,KSPLSQR);

	KSPGetPC(ksp, &pc);
	PCSetType(pc, PCNONE);

        KSPSetFromOptions(ksp);
        KSPSetUp(ksp);

	//start_clock("Before KSPSolve");
        KSPSolve(ksp,b,x);
	//	stop_clock("After KSPSolve");

}
开发者ID:tonyguo1，项目名称:LSGFD，代码行数:29，代码来源:solver_petsc.cpp


示例13: createOuterPC

void createOuterPC(OuterContext* ctx) {
  PCCreate(((ctx->data)->commAll), &(ctx->outerPC));
  PCSetType(ctx->outerPC, PCSHELL);
  PCShellSetName(ctx->outerPC, "RSD");
  PCShellSetContext(ctx->outerPC, ctx);
  PCShellSetApply(ctx->outerPC, &outerPCapply);
}
开发者ID:hsundar，项目名称:schur，代码行数:7，代码来源:schurSetup.C


示例14: KSPCreate

/*!
  \brief KSP and PC type

 KSPRICHARDSON "richardson"
 KSPCHEBYCHEV  "chebychev"
 KSPCG         "cg"
 KSPCGNE       "cgne"
 KSPNASH       "nash"
 KSPSTCG       "stcg"
 KSPGLTR       "gltr"
 KSPGMRES      "gmres"
 KSPFGMRES     "fgmres" 
 KSPLGMRES     "lgmres"
 KSPDGMRES     "dgmres"
 KSPTCQMR      "tcqmr"
 KSPBCGS       "bcgs"
 KSPIBCGS        "ibcgs"
 KSPBCGSL        "bcgsl"
 KSPCGS        "cgs"
 KSPTFQMR      "tfqmr"
 KSPCR         "cr"
 KSPLSQR       "lsqr"
 KSPPREONLY    "preonly"
 KSPQCG        "qcg"
 KSPBICG       "bicg"
 KSPMINRES     "minres"
 KSPSYMMLQ     "symmlq"
 KSPLCD        "lcd"
 KSPPYTHON     "python"
 KSPBROYDEN    "broyden"
 KSPGCR        "gcr"
 KSPNGMRES     "ngmres"
 KSPSPECEST    "specest"

 PCNONE            "none"
 PCJACOBI          "jacobi"
 PCSOR             "sor"
 PCLU              "lu"
 PCSHELL           "shell"
 PCBJACOBI         "bjacobi"
 PCMG              "mg"
 PCEISENSTAT       "eisenstat"
 PCILU             "ilu"
 PCICC             "icc"
 PCASM             "asm"
 PCGASM            "gasm"
 PCKSP             "ksp"
 PCCOMPOSITE       "composite"
 PCREDUNDANT       "redundant"
 PCSPAI            "spai"
 PCNN              "nn"
 PCCHOLESKY        "cholesky"
 PCPBJACOBI        "pbjacobi"
 PCMAT             "mat"
 PCHYPRE           "hypre"
 PCPARMS           "parms"
 PCFIELDSPLIT      "fieldsplit"
 PCTFS             "tfs"
 PCML              "ml"
 PCPROMETHEUS      "prometheus"
 PCGALERKIN        "galerkin"
 PCEXOTIC          "exotic"
 PCHMPI            "hmpi"
 PCSUPPORTGRAPH    "supportgraph"
 PCASA             "asa"
 PCCP              "cp"
 PCBFBT            "bfbt"
 PCLSC             "lsc"
 PCPYTHON          "python"
 PCPFMG            "pfmg"
 PCSYSPFMG         "syspfmg"
 PCREDISTRIBUTE    "redistribute"
 PCSACUSP          "sacusp"
 PCSACUSPPOLY      "sacusppoly"
 PCBICGSTABCUSP    "bicgstabcusp"
 PCSVD             "svd"
 PCAINVCUSP        "ainvcusp"
 PCGAMG            "gamg"

*/
void PETScLinearSolver::Config(const PetscReal tol, const PetscInt maxits, const KSPType lsol,
                               const PCType prec_type, const std::string &prefix)
{
   ltolerance = tol;
   sol_type = lsol;
   pc_type = prec_type; 

   KSPCreate(PETSC_COMM_WORLD,&lsolver);

#if (PETSC_VERSION_MAJOR == 3) && (PETSC_VERSION_MINOR > 4)
   KSPSetOperators(lsolver, A, A);
#else
   KSPSetOperators(lsolver, A, A, DIFFERENT_NONZERO_PATTERN);
#endif

   KSPSetType(lsolver,lsol);

   KSPGetPC(lsolver, &prec);
   PCSetType(prec, prec_type); //  PCJACOBI); //PCNONE);
   KSPSetTolerances(lsolver,ltolerance, PETSC_DEFAULT, PETSC_DEFAULT, maxits);
//.........这里部分代码省略.........
开发者ID:drjod，项目名称:ogs_kb1，代码行数:101，代码来源:PETScLinearSolver.cpp


示例15: TSMonitorSPEigCtxDestroy

/*@C
   TSMonitorSPEigCtxCreate - Creates a context for use with TS to monitor the eigenvalues of the linearized operator

   Collective on TS

   Input Parameters:
+  host - the X display to open, or null for the local machine
.  label - the title to put in the title bar
.  x, y - the screen coordinates of the upper left coordinate of the window
.  m, n - the screen width and height in pixels
-  howoften - if positive then determines the frequency of the plotting, if -1 then only at the final time

   Output Parameter:
.  ctx - the context

   Options Database Key:
.  -ts_monitor_sp_eig - plot egienvalues of linearized right hand side

   Notes:
   Use TSMonitorSPEigCtxDestroy() to destroy.

   Currently only works if the Jacobian is provided explicitly.

   Currently only works for ODEs u_t - F(t,u) = 0; that is with no mass matrix.

   Level: intermediate

.keywords: TS, monitor, line graph, residual, seealso

.seealso: TSMonitorSPEigTimeStep(), TSMonitorSet(), TSMonitorLGSolution(), TSMonitorLGError()

@*/
PetscErrorCode  TSMonitorSPEigCtxCreate(MPI_Comm comm,const char host[],const char label[],int x,int y,int m,int n,PetscInt howoften,TSMonitorSPEigCtx *ctx)
{
  PetscDraw      win;
  PetscErrorCode ierr;
  PC             pc;

  PetscFunctionBegin;
  ierr = PetscNew(ctx);CHKERRQ(ierr);
  ierr = PetscRandomCreate(comm,&(*ctx)->rand);CHKERRQ(ierr);
  ierr = PetscRandomSetFromOptions((*ctx)->rand);CHKERRQ(ierr);
  ierr = PetscDrawCreate(comm,host,label,x,y,m,n,&win);CHKERRQ(ierr);
  ierr = PetscDrawSetFromOptions(win);CHKERRQ(ierr);
  ierr = PetscDrawSPCreate(win,1,&(*ctx)->drawsp);CHKERRQ(ierr);
  ierr = KSPCreate(comm,&(*ctx)->ksp);CHKERRQ(ierr);
  ierr = KSPSetOptionsPrefix((*ctx)->ksp,"ts_monitor_sp_eig_");CHKERRQ(ierr); /* this is wrong, used use also prefix from the TS */
  ierr = KSPSetType((*ctx)->ksp,KSPGMRES);CHKERRQ(ierr);
  ierr = KSPGMRESSetRestart((*ctx)->ksp,200);CHKERRQ(ierr);
  ierr = KSPSetTolerances((*ctx)->ksp,1.e-10,PETSC_DEFAULT,PETSC_DEFAULT,200);CHKERRQ(ierr);
  ierr = KSPSetComputeSingularValues((*ctx)->ksp,PETSC_TRUE);CHKERRQ(ierr);
  ierr = KSPSetFromOptions((*ctx)->ksp);CHKERRQ(ierr);
  ierr = KSPGetPC((*ctx)->ksp,&pc);CHKERRQ(ierr);
  ierr = PCSetType(pc,PCNONE);CHKERRQ(ierr);

  (*ctx)->howoften          = howoften;
  (*ctx)->computeexplicitly = PETSC_FALSE;

  ierr = PetscOptionsGetBool(NULL,"-ts_monitor_sp_eig_explicitly",&(*ctx)->computeexplicitly,NULL);CHKERRQ(ierr);

  (*ctx)->comm = comm;
  (*ctx)->xmin = -2.1;
  (*ctx)->xmax = 1.1;
  (*ctx)->ymin = -1.1;
  (*ctx)->ymax = 1.1;
  PetscFunctionReturn(0);
}
开发者ID:00liujj，项目名称:petsc，代码行数:67，代码来源:tseig.c


示例16: PCASMGetSubKSP

  void PetscPreconditioner::set_petsc_subpreconditioner_type(const PCType type, PC& pc)  {

    int ierr;
    KSP* subksps;
    int nlocal;

    ierr = PCASMGetSubKSP(pc, &nlocal, PETSC_NULL, &subksps);
    CHKERRABORT(MPI_COMM_WORLD, ierr);

    PetscReal epsilon = 1.e-16;

    for(int i = 0; i < nlocal; i++) {
      PC subpc;

      ierr = KSPGetPC(subksps[i], &subpc);
      CHKERRABORT(MPI_COMM_WORLD, ierr);

      ierr = KSPSetTolerances(subksps[i], PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT, 1);
      CHKERRABORT(MPI_COMM_WORLD, ierr);

      ierr = KSPSetFromOptions(subksps[i]);
      CHKERRABORT(MPI_COMM_WORLD, ierr);

      ierr = PCSetType(subpc, type);
      CHKERRABORT(MPI_COMM_WORLD, ierr);

      ierr = PCFactorSetZeroPivot(subpc, epsilon);
      CHKERRABORT(MPI_COMM_WORLD, ierr);

      ierr = PCFactorSetShiftType(subpc, MAT_SHIFT_NONZERO);
      CHKERRABORT(MPI_COMM_WORLD, ierr);
    }
  }
开发者ID:gcapodag，项目名称:MyFEMuS，代码行数:33，代码来源:PetscPreconditioner.cpp


示例17: DMCoarsen_AKKT_GAMG11

PetscErrorCode DMCoarsen_AKKT_GAMG11(DM dm, Mat P0f0c, Mat *P1f1c_out) {
  PetscErrorCode ierr;
  DM_AKKT* kkt = (DM_AKKT*)(dm->data);
  Mat Aff   = kkt->Aff;   /* fine-level KKT matrix */ 
  Mat A1f0f;              /* fine-level dual (constraint) Jacobian */
  Mat A1f0c;              /* = A1f0f*P0f0c coarsen only primal indices */
  Mat B1f1f;              /* = A1f0c'*A1f0c */
  PC  gamg11;/* Use PCGAMG internally to get access to some of its methods to operate on B1f1f = A1f0c*A1f0c', where A1f0c = A1f0f*P0f0c. */
  PC_GAMG* pc_gamg11;
  Mat G1f1f; /* = Graph(B1f1f) */
  Mat P1f1c; /* = Prolongator(G1f1f); */
  PetscCoarsenData *coarsening;
  PetscFunctionBegin;

  /* 
   What is faster: 
     - A0c1f = P0f0c'*A0f1f followed by B1f1f = A0c1f'*A0c1f, or
     - A1f0c = A1f0f*P0f0c  followed by B1f1f = A1f0c*A1f0c'?
   My bet is on the latter: 
     - fewer transpositions inside MatMatMult and row indices are always local.
   */

  ierr = MatGetSubMatrix(Aff, kkt->isf[1], kkt->isf[0], MAT_INITIAL_MATRIX, &A1f0f);      CHKERRQ(ierr);
  if(kkt->transposeP) {
    ierr = MatMatTransposeMult(A1f0f,P0f0c,MAT_INITIAL_MATRIX, PETSC_DEFAULT, &A1f0c);    CHKERRQ(ierr); 
  }
  ierr = MatMatMult(A1f0f,P0f0c,MAT_INITIAL_MATRIX, PETSC_DEFAULT, &A1f0c);               CHKERRQ(ierr); 
  ierr = MatMatTransposeMult(A1f0c, A1f0c, MAT_INITIAL_MATRIX, PETSC_DEFAULT, &B1f1f);    CHKERRQ(ierr); 
  
  /* We create PCGAMG here since it is only needed for coarsening and we don't want to have to carry the attendant data structures, if we don't need them. */
  ierr = PCCreate(((PetscObject)dm)->comm, &gamg11); CHKERRQ(ierr);
  /* This must be an aggregating GAMG. */
  ierr = PCSetType(gamg11, PCGAMG);                  CHKERRQ(ierr);
  ierr = PCGAMGSetSquareGraph(gamg11, PETSC_FALSE);  CHKERRQ(ierr);
  /* 
   Observe that we want to "square" A1f0c before passing it (B1f1f) to GAMG.
   This is not because we are not sure how GAMG will deal with a (potentially) non-square matrix,
   but rather because if we asked GAMG to square it, it would also smooth the resulting prolongator.
   At least PC_GAMG_AGG would, and we need an unsmoothed prolongator. 
   */
  ierr = PCSetOperators(gamg11, B1f1f, B1f1f, DIFFERENT_NONZERO_PATTERN);            CHKERRQ(ierr);
  /* FIX: Currently there is no way to tell GAMG to coarsen onto a give comm, but it shouldn't be hard to hack that stuff in. */
  pc_gamg11 = (PC_GAMG*)(gamg11->data);
  ierr = pc_gamg11->graph(gamg11, B1f1f, &G1f1f);                                   CHKERRQ(ierr);
  ierr = pc_gamg11->coarsen(gamg11, &G1f1f, &coarsening);                           CHKERRQ(ierr);
  ierr = pc_gamg11->prolongator(gamg11, B1f1f, G1f1f, coarsening, &P1f1c);          CHKERRQ(ierr);

  ierr = MatDestroy(&A1f0f); CHKERRQ(ierr);
  ierr = MatDestroy(&A1f0c); CHKERRQ(ierr);
  ierr = MatDestroy(&B1f1f); CHKERRQ(ierr);
  ierr = MatDestroy(&G1f1f); CHKERRQ(ierr);
  ierr = PCDestroy(&gamg11); CHKERRQ(ierr);
  
  *P1f1c_out = P1f1c;

  PetscFunctionReturn(0);
}
开发者ID:Kun-Qu，项目名称:petsc，代码行数:57，代码来源:dmakkt.c


示例18: RunTest

PetscErrorCode RunTest(void)
{
  PetscInt       N    = 100;
  PetscBool      draw = PETSC_FALSE;
  PetscReal      rnorm;
  Mat            A;
  Vec            b,x,r;
  KSP            ksp;
  PC             pc;
  PetscErrorCode ierr;

  PetscFunctionBegin;

  ierr = PetscOptionsGetInt(0,"-N",&N,NULL);CHKERRQ(ierr);
  ierr = PetscOptionsGetBool(0,"-draw",&draw,NULL);CHKERRQ(ierr);

  ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr);
  ierr = MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N);CHKERRQ(ierr);
  ierr = MatSetType(A,MATPYTHON);CHKERRQ(ierr);
  ierr = MatPythonSetType(A,"example1.py:Laplace1D");CHKERRQ(ierr);
  ierr = MatSetUp(A);CHKERRQ(ierr);

  ierr = MatGetVecs(A,&x,&b);CHKERRQ(ierr);
  ierr = VecSet(b,1);CHKERRQ(ierr);

  ierr = KSPCreate(PETSC_COMM_WORLD,&ksp);CHKERRQ(ierr);
  ierr = KSPSetType(ksp,KSPPYTHON);CHKERRQ(ierr);
  ierr = KSPPythonSetType(ksp,"example1.py:ConjGrad");CHKERRQ(ierr);

  ierr = KSPGetPC(ksp,&pc);CHKERRQ(ierr);
  ierr = PCSetType(pc,PCPYTHON);CHKERRQ(ierr);
  ierr = PCPythonSetType(pc,"example1.py:Jacobi");CHKERRQ(ierr);

  ierr = KSPSetOperators(ksp,A,A);CHKERRQ(ierr);
  ierr = KSPSetFromOptions(ksp);CHKERRQ(ierr);
  ierr = KSPSolve(ksp,b,x);CHKERRQ(ierr);

  ierr = VecDuplicate(b,&r);CHKERRQ(ierr);
  ierr = MatMult(A,x,r);CHKERRQ(ierr);
  ierr = VecAYPX(r,-1,b);CHKERRQ(ierr);
  ierr = VecNorm(r,NORM_2,&rnorm);CHKERRQ(ierr);
  ierr = PetscPrintf(PETSC_COMM_WORLD,"error norm = %g\n",rnorm);CHKERRQ(ierr);

  if (draw) {
    ierr = VecView(x,PETSC_VIEWER_DRAW_WORLD);CHKERRQ(ierr);
    ierr = PetscSleep(2);CHKERRQ(ierr);
  }

  ierr = VecDestroy(&x);CHKERRQ(ierr);
  ierr = VecDestroy(&b);CHKERRQ(ierr);
  ierr = VecDestroy(&r);CHKERRQ(ierr);
  ierr = MatDestroy(&A);CHKERRQ(ierr);
  ierr = KSPDestroy(&ksp);CHKERRQ(ierr);

  PetscFunctionReturn(0);
}
开发者ID:00liujj，项目名称:petsc，代码行数:56，代码来源:ex1.c


示例19: main

int main(int argc,char **args)
{
  Mat            mat;
  Vec            b,u;
  PC             pc;
  PetscErrorCode ierr;
  PetscInt       n = 5,i,col[3];
  PetscScalar    value[3];

  PetscInitialize(&argc,&args,(char *)0,help);

  /* Create vectors */
  ierr = VecCreateSeq(PETSC_COMM_SELF,n,&b);CHKERRQ(ierr);
  ierr = VecCreateSeq(PETSC_COMM_SELF,n,&u);CHKERRQ(ierr);

  /* Create and assemble matrix */
  ierr = MatCreateSeqDense(PETSC_COMM_SELF,n,n,PETSC_NULL,&mat);CHKERRQ(ierr);
  value[0] = -1.0; value[1] = 2.0; value[2] = -1.0;
  for (i=1; i<n-1; i++) {
    col[0] = i-1; col[1] = i; col[2] = i+1;
    ierr = MatSetValues(mat,1,&i,3,col,value,INSERT_VALUES);CHKERRQ(ierr);
  }
  i = n - 1; col[0] = n - 2; col[1] = n - 1;
  ierr = MatSetValues(mat,1,&i,2,col,value,INSERT_VALUES);CHKERRQ(ierr);
  i = 0; col[0] = 0; col[1] = 1; value[0] = 2.0; value[1] = -1.0;
  ierr = MatSetValues(mat,1,&i,2,col,value,INSERT_VALUES);CHKERRQ(ierr);
  ierr = MatAssemblyBegin(mat,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatAssemblyEnd(mat,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);

  /* Create PC context and set up data structures */
  ierr = PCCreate(PETSC_COMM_WORLD,&pc);CHKERRQ(ierr);
  ierr = PCSetType(pc,PCSOR);CHKERRQ(ierr);
  ierr = PCSetFromOptions(pc);CHKERRQ(ierr);
  ierr = PCSetOperators(pc,mat,mat,DIFFERENT_NONZERO_PATTERN);CHKERRQ(ierr);
  ierr = PCSetUp(pc);CHKERRQ(ierr);

  value[0] = 1.0;
  for (i=0; i<n; i++) {
    ierr = VecSet(u,0.0);CHKERRQ(ierr);
    ierr = VecSetValues(u,1,&i,value,INSERT_VALUES);CHKERRQ(ierr);
    ierr = VecAssemblyBegin(u);CHKERRQ(ierr);
    ierr = VecAssemblyEnd(u);CHKERRQ(ierr);
    ierr = PCApply(pc,u,b);CHKERRQ(ierr);
    ierr = VecView(b,PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr);
  }

  /* Free data structures */
  ierr = MatDestroy(&mat);CHKERRQ(ierr);
  ierr = PCDestroy(&pc);CHKERRQ(ierr);
  ierr = VecDestroy(&u);CHKERRQ(ierr);
  ierr = VecDestroy(&b);CHKERRQ(ierr); 
  ierr = PetscFinalize();
  return 0;
}
开发者ID:Kun-Qu，项目名称:petsc，代码行数:54，代码来源:ex4.c


示例20: Solver_get_velocity_solver

/* This function returns the suitable solver for the velocity linear system */
KSP Solver_get_velocity_solver(Mat lhs, Parameters *params) {

    KSP solver;
    PC pc;
    double rtol;
    int ierr;

    rtol = params->resmax;

    ierr = KSPCreate(PETSC_COMM_WORLD, &solver); PETScErrAct(ierr);
    ierr = KSPSetOperators(solver, lhs, lhs, SAME_NONZERO_PATTERN); PETScErrAct(ierr);

    //ierr = KSPSetType(solver, KSPGMRES); PETScErrAct(ierr);
    ierr = KSPSetType(solver, KSPIBCGS); PETScErrAct(ierr);

    ierr = KSPSetTolerances(solver, rtol, PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT); PETScErrAct(ierr);

    ierr = KSPGetPC(solver, &pc); PETScErrAct(ierr);
    ierr = PCSetType(pc, PCNONE); PETScErrAct(ierr);
    //ierr = PCSetType(pc, PCJACOBI); PETScErrAct(ierr);
    //ierr = PCSetType(pc, PCNONE); PETScErrAct(ierr);

    //ierr = PCSetType(pc, PCASM); PETScErrAct(ierr);

    //ierr = PCSetType(pc, PCBJACOBI); PETScErrAct(ierr);

    //ierr = PCSetType(pc, PCBJACOBI); PETScErrAct(ierr);
    //ierr = PCSetType(pc, PCLU); PETScErrAct(ierr);

    //ierr = PCSetType(pc, PCEISENSTAT); PETScErrAct(ierr);
    //ierr = PCSetType(pc, PCSOR); PETScErrAct(ierr);
    //ierr = PCSetType(pc, PCJACOBI); PETScErrAct(ierr);
    //ierr = PCSetType(pc, PCNONE); PETScErrAct(ierr);

    /*
 ierr = KSPGetPC(solver, &pc); PETScErrAct(ierr);
 ierr = PCSetType(pc, PCILU); PETScErrAct(ierr);
 ierr = PCFactorSetLevels(pc, 3); PETScErrAct(ierr);

 //ierr = PCFactorSetUseDropTolerance(pc, 1e-3, .1, 50); PETScErrAct(ierr);
 //ierr = PCFactorSetFill(pc, 30.7648); PETScErrAct(ierr);

 ierr = PCFactorSetReuseOrdering(pc, PETSC_TRUE); PETScErrAct(ierr);
 ierr = PCFactorSetReuseFill(pc, PETSC_TRUE); PETScErrAct(ierr);
 ierr = PCFactorSetAllowDiagonalFill(pc); PETScErrAct(ierr);

 //ierr = PCFactorSetUseInPlace(pc); PETScErrAct(ierr);
*/
    ierr = KSPSetInitialGuessNonzero(solver, PETSC_TRUE); PETScErrAct(ierr);
    ierr = KSPSetFromOptions(solver); PETScErrAct(ierr);


    return solver;
}
开发者ID:haowu80s，项目名称:turbins，代码行数:55，代码来源:Solver.c



注：本文中的PCSetType函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

鲜花
握手
雷人
路过
鸡蛋
该文章已有0人参与评论

请发表评论

全部评论

专题导读
More+
上一篇：
C++ PC_ExpectAnyToken函数代码示例发布时间：2022-05-30
下一篇：
C++ PCPU_SET函数代码示例发布时间：2022-05-30
热门推荐
More+
热门话题
More+
阅读排行榜

扫描微信二维码

查看手机版网站

随时了解更新最新资讯

139-2527-9053

在线客服（服务时间 9:00～18:00）

在线QQ客服
地址：深圳市南山区西丽大学城创智工业园
电邮：jeky_zhao#qq.com
移动电话：139-2527-9053

Powered by 互联科技 X3.4© 2001-2213 极客世界.|Sitemap