Actual source code: pipefgmresimpl.h

      1: #pragma once

      3: #define KSPGMRES_NO_MACROS
      4: #include <../src/ksp/ksp/impls/gmres/gmresimpl.h>

      6: typedef struct {
      7:   KSPGMRESHEADER

      9:   /* new storage for explicit storage of preconditioned basis vectors */
     10:   Vec  *prevecs;           /* holds the preconditioned basis vectors for fgmres. We will allocate these at the same time as vecs
     11:                               above (and in the same size "chunks". */
     12:   Vec **prevecs_user_work; /* same purpose as user_work above, but this one is for our preconditioned vectors */

     14:   /* new storage for explicit storage of pipelining quantities */
     15:   Vec  *zvecs;
     16:   Vec **zvecs_user_work;

     18:   /* A shift parameter */
     19:   PetscScalar shift;

     21:   /* Work space to allow all reductions in a single call */
     22:   Vec *redux;

     24: } KSP_PIPEFGMRES;

     26: #define HH(a, b) (pipefgmres->hh_origin + (b) * (pipefgmres->max_k + 2) + (a))
     27: /* HH will be size (max_k+2)*(max_k+1)  -  think of HH as being stored columnwise for access purposes. */
     28: #define HES(a, b) (pipefgmres->hes_origin + (b) * (pipefgmres->max_k + 1) + (a))
     29: /* HES will be size (max_k + 1) * (max_k + 1) -  again, think of HES as being stored columnwise */
     30: #define CC(a) (pipefgmres->cc_origin + (a)) /* CC will be length (max_k+1) - cosines */
     31: #define SS(a) (pipefgmres->ss_origin + (a)) /* SS will be length (max_k+1) - sines */
     32: #define RS(a) (pipefgmres->rs_origin + (a)) /* RS will be length (max_k+2) - rt side */

     34: /* vector names */
     35: #define VEC_OFFSET     4
     36: #define VEC_TEMP       pipefgmres->vecs[0] /* work space */
     37: #define VEC_TEMP_MATOP pipefgmres->vecs[1] /* work space */
     38: #define VEC_Q          pipefgmres->vecs[2] /* work space - Q pipelining var */
     39: #define VEC_W          pipefgmres->vecs[3] /* work space - W pipelining var */

     41: #define VEC_VV(i) pipefgmres->vecs[VEC_OFFSET + i] /* use to access othog basis vectors. Note the offset, since we use the first few as workspace */

     43: #define PREVEC(i) pipefgmres->prevecs[i] /* use to access preconditioned basis */
     44: #define ZVEC(i)   pipefgmres->zvecs[i]

     46: #define PIPEFGMRES_DELTA_DIRECTIONS 10
     47: #define PIPEFGMRES_DEFAULT_MAXK     30