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305 lines
9.1 KiB
Fortran
305 lines
9.1 KiB
Fortran
20 years ago
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PROGRAM ZF_SAMPLE
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USE TYPESP
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USE TYPEDESC
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USE F90TOOLS
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USE F90PSBLAS
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USE F90METHD
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USE MAT_DIST
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USE READ_MAT
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USE PARTGRAPH
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USE GETP
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IMPLICIT NONE
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! Input parameters
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CHARACTER*20 :: CMETHD, PREC, MTRX_FILE, RHS_FILE
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CHARACTER*80 :: CHARBUF
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DOUBLE PRECISION DDOT
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EXTERNAL DDOT
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INTERFACE
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! .....user passed subroutine.....
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SUBROUTINE PART_BLOCK(GLOBAL_INDX,N,NP,PV,NV)
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IMPLICIT NONE
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INTEGER, INTENT(IN) :: GLOBAL_INDX, N, NP
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INTEGER, INTENT(OUT) :: NV
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INTEGER, INTENT(OUT) :: PV(*)
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END SUBROUTINE PART_BLOCK
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END INTERFACE ! Local variables
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INTEGER, PARAMETER :: IZERO=0, IONE=1
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CHARACTER, PARAMETER :: ORDER='R'
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COMPLEX(KIND(1.D0)), POINTER,SAVE :: B_COL(:), X_COL(:), R_COL(:), &
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& B_COL_GLOB(:), X_COL_GLOB(:), R_COL_GLOB(:), B_GLOB(:,:), &
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&Z(:), Q(:),Z1(:)
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INTEGER :: IARGC
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Real(Kind(1.d0)), Parameter :: Dzero = 0.d0, One = 1.d0
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Real(Kind(1.d0)) :: MPI_WTIME, T1, T2, TPREC, R_AMAX, B_AMAX,bb(1,1),lambda,scale,resmx,resmxp
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integer :: nrhs, nrow, nx1, nx2, n_row
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External IARGC, MPI_WTIME
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integer bsze,overlap
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common/part/bsze,overlap
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! Sparse Matrices
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TYPE(Z_SPMAT) :: A, AUX_A, L, U
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!!$ TYPE(D_PRECN) :: APRC
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! Dense Matrices
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COMPLEX(KIND(1.D0)), POINTER :: AUX_B(:,:) , AUX1(:), AUX2(:), VDIAG(:),&
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& AUX_G(:,:), AUX_X(:,:)
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! Communications data structure
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TYPE(desc_type) :: DESC_A
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! BLACS parameters
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INTEGER :: NPROW, NPCOL, ICTXT, IAM, NP, MYPROW, MYPCOL
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logical :: amroot
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! Solver paramters
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INTEGER :: ITER, ITMAX, IERR, ITRACE, IRCODE, IPART,&
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& IPREC, METHD, ISTOPC, ML
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integer, pointer :: ierrv(:)
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REAL(KIND(1.D0)) :: ERR, EPS
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integer iparm(20)
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real(kind(1.d0)) rparm(20)
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! Other variables
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INTEGER :: I,INFO,J
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INTEGER :: INTERNAL, M,II,NNZERO
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! common area
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INTEGER M_PROBLEM, NPROC
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allocate(ierrv(6))
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! Initialize BLACS
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CALL BLACS_PINFO(IAM, NP)
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CALL BLACS_GET(IZERO, IZERO, ICTXT)
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! Rectangular Grid, Np x 1
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CALL BLACS_GRIDINIT(ICTXT, ORDER, NP, IONE)
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CALL BLACS_GRIDINFO(ICTXT, NPROW, NPCOL, MYPROW, MYPCOL)
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amroot = (myprow==0).and.(mypcol==0)
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!
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! Get parameters
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!
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CALL GET_PARMS(ICTXT,MTRX_FILE,RHS_FILE,CMETHD,PREC,&
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& IPART,ISTOPC,ITMAX,ITRACE,ML,IPREC,EPS)
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CALL BLACS_BARRIER(ICTXT,'A')
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T1 = MPI_WTIME()
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! Read the input matrix to be processed and (possibly) the RHS
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NRHS = 1
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IF (amroot) THEN
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NULLIFY(AUX_B)
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CALL ZREADMAT(MTRX_FILE, AUX_A, ICTXT)
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M_PROBLEM = AUX_A%M
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CALL IGEBS2D(ICTXT,'A',' ',1,1,M_PROBLEM,1)
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IF(RHS_FILE.NE.'NONE') THEN
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! Reading an RHS
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CALL ZREAD_RHS(RHS_FILE,AUX_B,ICTXT)
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END IF
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IF (ASSOCIATED(AUX_B).and.SIZE(AUX_B,1)==M_PROBLEM) THEN
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! If any RHS were present, broadcast the first one
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write(0,*) 'Ok, got an RHS ',aux_b(m_problem,1)
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B_COL_GLOB =>AUX_B(:,1)
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ELSE
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write(0,*) 'Inventing an RHS '
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ALLOCATE(AUX_B(M_PROBLEM,1), STAT=IRCODE)
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IF (IRCODE /= 0) THEN
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WRITE(0,*) 'Memory allocation failure in ZF_SAMPLE'
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CALL BLACS_ABORT(ICTXT,-1)
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STOP
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ENDIF
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write(0,*) 'Check on AUX_B ',size(aux_b,1),size(aux_b,2),m_problem
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B_COL_GLOB => AUX_B(:,1)
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DO I=1, M_PROBLEM
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B_COL_GLOB(I) = CMPLX(I*2.0/M_PROBLEM,0)
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ENDDO
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ENDIF
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CALL ZGEBS2D(ICTXT,'A',' ',M_PROBLEM,1,B_COL_GLOB,M_PROBLEM)
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ELSE
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CALL IGEBR2D(ICTXT,'A',' ',1,1,M_PROBLEM,1,0,0)
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WRITE(0,*) 'Receiving AUX_B'
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ALLOCATE(AUX_B(M_PROBLEM,1), STAT=IRCODE)
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IF (IRCODE /= 0) THEN
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WRITE(0,*) 'Memory allocation failure in ZF_SAMPLE'
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CALL BLACS_ABORT(ICTXT,-1)
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STOP
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ENDIF
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write(0,*) 'Check on AUX_B ',size(aux_b,1),size(aux_b,2),m_problem
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B_COL_GLOB =>AUX_B(:,1)
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CALL ZGEBR2D(ICTXT,'A',' ',M_PROBLEM,1,B_COL_GLOB,M_PROBLEM,0,0)
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END IF
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NPROC = NPROW
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! Switch over different partition types
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IF (IPART.EQ.0) THEN
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CALL BLACS_BARRIER(ICTXT,'A')
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WRITE(6,*) 'Partition type: BLOCK'
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CALL ZMATDIST(AUX_A, A, PART_BLOCK, ICTXT, &
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& DESC_A,B_COL_GLOB,B_COL)
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ELSE IF (IPART.EQ.2) THEN
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WRITE(6,*) amroot,' Partition type: GRAPH'
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IF (amroot) THEN
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CALL BUILD_GRPPART(AUX_A%M,AUX_A%FIDA,AUX_A%IA1,AUX_A%IA2,NP)
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ENDIF
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call blacs_barrier(ictxt,'All')
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CALL DISTR_GRPPART(0,0,ICTXT)
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CALL ZMATDIST(AUX_A, A, PART_GRAPH, ICTXT, &
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& DESC_A,B_COL_GLOB,B_COL)
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ELSE
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WRITE(6,*) 'Partition type: BLOCK'
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CALL ZMATDIST(AUX_A, A, PART_BLOCK, ICTXT, &
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& DESC_A,B_COL_GLOB,B_COL)
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END IF
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write(*,*) amroot,' Done matdist'
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CALL F90_PSDSALL(M_PROBLEM,X_COL,IERRV,DESC_A)
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X_COL(:) =0.0
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CALL F90_PSDSASB(X_COL,IERRV,DESC_A)
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CALL F90_PSDSALL(M_PROBLEM,R_COL,IERRV,DESC_A)
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R_COL(:) =0.0
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CALL F90_PSDSASB(R_COL,IERRV,DESC_A)
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T2 = MPI_WTIME() - T1
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CALL DGAMX2D(ICTXT, 'A', ' ', IONE, IONE, T2, IONE,&
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& T1, T1, -1, -1, -1)
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IF (amroot) THEN
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WRITE(6,*) 'Time to Read and Partition Matrix : ',T2
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END IF
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!
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! Prepare the preconditioning matrix. Note the availability
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! of optional parameters
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!
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IF (amroot) WRITE(6,*) 'Preconditioner : "',PREC(1:6),'" ',iprec
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T1 = MPI_WTIME()
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CALL PRECONDITIONER(IPREC,A,L,U,VDIAG,DESC_A,INFO)
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TPREC = MPI_WTIME()-T1
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CALL DGAMX2D(ICTXT,'A',' ',IONE, IONE,TPREC,IONE,T1,T1,-1,-1,-1)
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WRITE(0,*) 'Preconditioner Time : ',TPREC,' ',&
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&prec,iprec
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IF (INFO /= 0) THEN
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WRITE(0,*) 'Error in preconditioner :',INFO
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CALL BLACS_ABORT(ICTXT,-1)
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STOP
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END IF
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IPARM = 0
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RPARM = 0.D0
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write(0,*) amroot,'Starting method'
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CALL BLACS_BARRIER(ICTXT,'All')
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T1 = MPI_WTIME()
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IF (CMETHD.EQ.'BICGSTAB') Then
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CALL F90_BICGSTAB(A,IPREC,L,U,VDIAG,B_COL,X_COL,EPS,DESC_A,&
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& ITMAX,ITER,ERR,IERR,ITRACE)
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!!$ ELSE IF (CMETHD.EQ.'BICG') Then
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!!$ CALL F90_BICG(A,IPREC,L,U,VDIAG,B_COL,X_COL,EPS,DESC_A,&
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!!$ & ITMAX,ITER,ERR,IERR,ITRACE)
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!!$ ELSE IF (CMETHD.EQ.'CGS') Then
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!!$ CALL F90_CGS(A,IPREC,L,U,VDIAG,B_COL,X_COL,EPS,DESC_A,&
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!!$ & ITMAX,ITER,ERR,IERR,ITRACE)
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!!$ ELSE IF (CMETHD.EQ.'BICGSTABL') Then
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!!$ CALL F90_BICGSTABL(A,IPREC,L,U,VDIAG,B_COL,X_COL,EPS,DESC_A,&
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!!$ & ITMAX,ITER,ERR,IERR,ITRACE,ML)
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ENDIF
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CALL BLACS_BARRIER(ICTXT,'All')
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T2 = MPI_WTIME() - T1
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CALL DGAMX2D(ICTXT,'A',' ',IONE, IONE,T2,IONE,T1,T1,-1,-1,-1)
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call f90_psaxpby((1.d0,0.d0),b_col,(0.d0,0.d0),r_col,desc_A)
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call f90_psspmm((-1.d0,0.d0),a,x_col,(1.d0,0.d0),r_col,desc_a)
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call f90_amax(resmx,r_col,desc_a)
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where (b_col/= 0)
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r_col = r_col/b_col
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end where
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call f90_amax(resmxp,r_col,desc_a)
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!!$ ITER=IPARM(5)
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!!$ ERR = RPARM(2)
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if (amroot) then
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write(6,*) 'methd iprec istopc : ',iprec, istopc
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write(6,*) 'Number of iterations : ',iter
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write(6,*) 'Time to Solve Matrix : ',T2
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WRITE(6,*) 'Time per iteration : ',T2/(ITER)
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WRITE(6,*) 'Error on exit : ',ERR
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END IF
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allocate(x_col_glob(m_problem),r_col_glob(m_problem),stat=ierr)
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if (ierr.ne.0) then
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write(0,*) 'Allocation error: no data collection'
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else
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call f90_psdgatherm(x_col_glob,x_col,desc_a,iroot=0)
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call f90_psdgatherm(r_col_glob,r_col,desc_a,iroot=0)
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if (amroot) then
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write(0,*) 'Saving X on file'
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write(20,*) 'Matrix: ',mtrx_file
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write(20,*) 'Computed solution on ',NPROW,' processors.'
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write(20,*) 'Iterations to convergence: ',iter
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write(20,*) 'Error indicator (infinity norm) on exit:', &
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& ' ||r||/(||A||||x||+||b||) = ',err
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write(20,*) 'Max residual = ',resmx, resmxp
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do i=1,m_problem
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write(20,998) i,x_col_glob(i),r_col_glob(i),b_col_glob(i)
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enddo
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end if
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end if
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998 format(i8,4(2x,g20.14))
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993 format(i6,4(1x,e12.6))
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!!$ !
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!!$ ! Raleygh quotients for first eigenvalue
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!!$ !
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!!$ CALL F90_PSDSall(M_problem,Q,ierrv,DESC_A)
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!!$ CALL F90_PSDSall(M_problem,Z,ierrv,DESC_A)
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!!$ CALL F90_PSDSall(M_problem,Z1,ierrv,DESC_A)
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!!$ CALL F90_PSDSasb(Q,ierrv,DESC_A)
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!!$ CALL F90_PSDSasb(Z,ierrv,DESC_A)
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!!$ CALL F90_PSDSasb(Z1,ierrv,DESC_A)
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!!$ scale = f90_psnrm2(x_col,desc_a)
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!!$ scale = one/scale
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!!$ call f90_psaxpby(scale,x_col,dzero,q,desc_A)
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!!$ call f90_psspmm(one,a,q,dzero,z,desc_a)
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!!$ do i=1, itmax
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!!$ scale = f90_psnrm2(z,desc_a)
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!!$ scale = one/scale
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!!$ call f90_psaxpby(one,z,dzero,z1,desc_a)
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!!$ call f90_psaxpby(scale,z,dzero,q,desc_a)
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!!$ call f90_psspmm(one,a,q,dzero,z,desc_a)
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!!$ lambda = f90_psdot(q,z,desc_A)
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!!$ scale = f90_psnrm2(z,desc_A)
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!!$ if (amroot) write(0,*) 'Lambda: ',i,lambda, scale
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!!$ enddo
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!!$ call f90_psaxpby(-one,z,one,z1,desc_a)
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!!$ scale = f90_psnrm2(z1,desc_A)
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!!$ if (amroot) write(0,*) 'Final check: ',i,lambda, scale
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!!$ do i=1, desc_a%matrix_data(n_row_)
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!!$ scale=z(i)/q(i)
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!!$ write(0,*) 'Vector check: ',i,lambda, scale,abs(scale-lambda)
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!!$ enddo
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CALL F90_PSDSFREE(B_COL, DESC_A)
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CALL F90_PSDSFREE(X_COL, DESC_A)
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CALL F90_PSSPFREE(A, DESC_A)
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IF (IPREC.GE.2) THEN
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CALL F90_PSSPFREE(L, DESC_A)
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CALL F90_PSSPFREE(U, DESC_A)
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END IF
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CALL F90_PSDSCFREE(DESC_A,info)
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CALL BLACS_GRIDEXIT(ICTXT)
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CALL BLACS_EXIT(0)
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END PROGRAM ZF_SAMPLE
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