Date: 2022-10-01T06:40:55+00:00

Actual source code: slepcimpl.h
slepc-3.18.0 2022-10-01
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.
      7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
      8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      9: */

     11: #if !defined(SLEPCIMPL_H)
     12: #define SLEPCIMPL_H

     14: #include <slepcsys.h>
     15: #include <petsc/private/petscimpl.h>

     17: /* SUBMANSEC = sys */

     19: SLEPC_INTERN PetscBool SlepcBeganPetsc;

     21: /*@C
     22:     SlepcHeaderCreate - Creates a SLEPc object

     24:     Input Parameters:
     25: +   classid - the classid associated with this object
     26: .   class_name - string name of class; should be static
     27: .   descr - string containing short description; should be static
     28: .   mansec - string indicating section in manual pages; should be static
     29: .   comm - the MPI Communicator
     30: .   destroy - the destroy routine for this object
     31: -   view - the view routine for this object

     33:     Output Parameter:
     34: .   h - the newly created object

     36:     Note:
     37:     This is equivalent to PetscHeaderCreate but makes sure that SlepcInitialize
     38:     has been called.

     40:     Level: developer
     41: @*/
     42: #define SlepcHeaderCreate(h,classid,class_name,descr,mansec,comm,destroy,view) \
     43:     ((!SlepcInitializeCalled && \
     44:     PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,1,PETSC_ERROR_INITIAL, \
     45:     "Must call SlepcInitialize instead of PetscInitialize to use SLEPc classes")) ||  \
     46:     PetscHeaderCreate(h,classid,class_name,descr,mansec,comm,destroy,view))

     48: /* context for monitors of type XXXMonitorConverged */
     49: struct _n_SlepcConvMon {
     50:   void     *ctx;
     51:   PetscInt oldnconv;  /* previous value of nconv */
     52: };

     54: /*
     55:   SlepcPrintEigenvalueASCII - Print an eigenvalue on an ASCII viewer.
     56: */
     57: static inline PetscErrorCode SlepcPrintEigenvalueASCII(PetscViewer viewer,PetscScalar eigr,PetscScalar eigi)
     58: {
     59:   PetscReal      re,im;

     61: #if defined(PETSC_USE_COMPLEX)
     62:   re = PetscRealPart(eigr);
     63:   im = PetscImaginaryPart(eigr);
     64: #else
     65:   re = eigr;
     66:   im = eigi;
     67: #endif
     68:   /* print zero instead of tiny value */
     69:   if (PetscAbs(im) && PetscAbs(re)/PetscAbs(im)<PETSC_SMALL) re = 0.0;
     70:   if (PetscAbs(re) && PetscAbs(im)/PetscAbs(re)<PETSC_SMALL) im = 0.0;
     71:   /* print as real if imaginary part is zero */
     72:   if (im!=0.0) PetscViewerASCIIPrintf(viewer,"%.5f%+.5fi",(double)re,(double)im);
     73:   else PetscViewerASCIIPrintf(viewer,"%.5f",(double)re);
     74:   return 0;
     75: }

     77: /*
     78:   SlepcViewEigenvector - Outputs an eigenvector xr,xi to a viewer.
     79:   In complex scalars only xr is written.
     80:   The name of xr,xi is set before writing, based on the label, the index, and the name of obj.
     81: */
     82: static inline PetscErrorCode SlepcViewEigenvector(PetscViewer viewer,Vec xr,Vec xi,const char *label,PetscInt index,PetscObject obj)
     83: {
     84:   size_t         count;
     85:   char           vname[30];
     86:   const char     *pname;

     88:   PetscObjectGetName(obj,&pname);
     89:   PetscSNPrintfCount(vname,sizeof(vname),"%s%s",&count,label,PetscDefined(USE_COMPLEX)?"":"r");
     90:   count--;
     91:   PetscSNPrintf(vname+count,sizeof(vname)-count,"%" PetscInt_FMT "_%s",index,pname);
     92:   PetscObjectSetName((PetscObject)xr,vname);
     93:   VecView(xr,viewer);
     94: #if !defined(PETSC_USE_COMPLEX)
     95:   vname[count-1] = 'i';
     96:   PetscObjectSetName((PetscObject)xi,vname);
     97:   VecView(xi,viewer);
     98: #endif
     99:   return 0;
    100: }

    102: /* Macros for strings with different value in real and complex */
    103: #if defined(PETSC_USE_COMPLEX)
    104: #define SLEPC_STRING_HERMITIAN "hermitian"
    105: #else
    106: #define SLEPC_STRING_HERMITIAN "symmetric"
    107: #endif

    109: /* Private functions that are shared by several classes */
    110: SLEPC_EXTERN PetscErrorCode SlepcBasisReference_Private(PetscInt,Vec*,PetscInt*,Vec**);
    111: SLEPC_EXTERN PetscErrorCode SlepcBasisDestroy_Private(PetscInt*,Vec**);
    112: SLEPC_EXTERN PetscErrorCode SlepcMonitorMakeKey_Internal(const char[],PetscViewerType,PetscViewerFormat,char[]);
    113: SLEPC_EXTERN PetscErrorCode PetscViewerAndFormatCreate_Internal(PetscViewer,PetscViewerFormat,void*,PetscViewerAndFormat**);

    115: SLEPC_INTERN PetscErrorCode SlepcCitationsInitialize(void);
    116: SLEPC_INTERN PetscErrorCode SlepcInitialize_DynamicLibraries(void);
    117: SLEPC_INTERN PetscErrorCode SlepcInitialize_Packages(void);

    119: /* Definitions needed to work with CUDA kernels */
    120: #if defined(PETSC_HAVE_CUDA)
    121: #include <petscdevice_cuda.h>

    123: #define X_AXIS 0
    124: #define Y_AXIS 1

    126: #define SLEPC_TILE_SIZE_X  32
    127: #define SLEPC_BLOCK_SIZE_X 128
    128: #define SLEPC_TILE_SIZE_Y  32
    129: #define SLEPC_BLOCK_SIZE_Y 128

    131: static inline PetscErrorCode SlepcKernelSetGrid1D(PetscInt rows,dim3 *dimGrid,dim3 *dimBlock,PetscInt *dimGrid_xcount)
    132: {
    133:   int                   card;
    134:   struct cudaDeviceProp devprop;

    136:   cudaGetDevice(&card);
    137:   cudaGetDeviceProperties(&devprop,card);
    138:   *dimGrid_xcount = 1;

    140:   /* X axis */
    141:   dimGrid->x  = 1;
    142:   dimBlock->x = SLEPC_BLOCK_SIZE_X;
    143:   if (rows>SLEPC_BLOCK_SIZE_X) dimGrid->x = (rows+SLEPC_BLOCK_SIZE_X-1)/SLEPC_BLOCK_SIZE_X;
    144:   else dimBlock->x = rows;
    145:   if (dimGrid->x>(unsigned)devprop.maxGridSize[X_AXIS]) {
    146:     *dimGrid_xcount = (dimGrid->x+(devprop.maxGridSize[X_AXIS]-1))/devprop.maxGridSize[X_AXIS];
    147:     dimGrid->x = devprop.maxGridSize[X_AXIS];
    148:   }
    149:   return 0;
    150: }

    152: static inline PetscErrorCode SlepcKernelSetGrid2DTiles(PetscInt rows,PetscInt cols,dim3 *dimGrid,dim3 *dimBlock,PetscInt *dimGrid_xcount,PetscInt *dimGrid_ycount)
    153: {
    154:   int                   card;
    155:   struct cudaDeviceProp devprop;

    157:   cudaGetDevice(&card);
    158:   cudaGetDeviceProperties(&devprop,card);
    159:   *dimGrid_xcount = *dimGrid_ycount = 1;

    161:   /* X axis */
    162:   dimGrid->x  = 1;
    163:   dimBlock->x = SLEPC_BLOCK_SIZE_X;
    164:   if (rows>SLEPC_BLOCK_SIZE_X*SLEPC_TILE_SIZE_X) dimGrid->x = (rows+SLEPC_BLOCK_SIZE_X*SLEPC_TILE_SIZE_X-1)/(SLEPC_BLOCK_SIZE_X*SLEPC_TILE_SIZE_X);
    165:   else dimBlock->x = (rows+SLEPC_TILE_SIZE_X-1)/SLEPC_TILE_SIZE_X;
    166:   if (dimGrid->x>(unsigned)devprop.maxGridSize[X_AXIS]) {
    167:     *dimGrid_xcount = (dimGrid->x+(devprop.maxGridSize[X_AXIS]-1))/devprop.maxGridSize[X_AXIS];
    168:     dimGrid->x = devprop.maxGridSize[X_AXIS];
    169:   }

    171:   /* Y axis */
    172:   dimGrid->y  = 1;
    173:   dimBlock->y = SLEPC_BLOCK_SIZE_Y;
    174:   if (cols>SLEPC_BLOCK_SIZE_Y*SLEPC_TILE_SIZE_Y) dimGrid->y = (cols+SLEPC_BLOCK_SIZE_Y*SLEPC_TILE_SIZE_Y-1)/(SLEPC_BLOCK_SIZE_Y*SLEPC_TILE_SIZE_Y);
    175:   else dimBlock->y = (cols+SLEPC_TILE_SIZE_Y-1)/SLEPC_TILE_SIZE_Y;
    176:   if (dimGrid->y>(unsigned)devprop.maxGridSize[Y_AXIS]) {
    177:     *dimGrid_ycount = (dimGrid->y+(devprop.maxGridSize[Y_AXIS]-1))/devprop.maxGridSize[Y_AXIS];
    178:     dimGrid->y = devprop.maxGridSize[Y_AXIS];
    179:   }
    180:   return 0;
    181: }
    182: #undef X_AXIS
    183: #undef Y_AXIS
    184: #endif

    186: #endif