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SUBROUTINE PCSDPSUBTST( WKNOWN, UPLO, N, THRESH, ABSTOL, A, COPYA,
$ Z, IA, JA, DESCA, WIN, WNEW, IPREPAD,
$ IPOSTPAD, WORK, LWORK, RWORK, LRWORK,
$ LWORK1, IWORK, LIWORK, RESULT, TSTNRM,
$ QTQNRM, NOUT )
*
* -- ScaLAPACK testing routine (version 1.7) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* February 28, 2000
*
* .. Scalar Arguments ..
LOGICAL WKNOWN
CHARACTER UPLO
INTEGER IA, IPOSTPAD, IPREPAD, JA, LIWORK, LRWORK,
$ LWORK, LWORK1, N, NOUT, RESULT
REAL ABSTOL, QTQNRM, THRESH, TSTNRM
* ..
* .. Array Arguments ..
INTEGER DESCA( * ), IWORK( * )
REAL RWORK( * ), WIN( * ), WNEW( * )
COMPLEX A( * ), COPYA( * ), WORK( * ), Z( * )
* ..
*
* Purpose
* =======
*
* PCSDPSUBTST calls PCHEEVD and then tests the output of
* PCHEEVD
* If JOBZ = 'V' then the following two tests are performed:
* |AQ -QL| / (abstol + eps * norm(A) ) < N*THRESH
* |QT * Q - I| / eps * norm(A) < N*THRESH
* If WKNOWN then
* we check to make sure that the eigenvalues match expectations
* i.e. |WIN - WNEW(1+IPREPAD)| / (eps * |WIN|) < THRESH
* where WIN is the array of eigenvalues as computed by
* PCHEEVD when eigenvectors are requested
*
* Arguments
* =========
*
* NP = the number of rows local to a given process.
* NQ = the number of columns local to a given process.
*
* WKNOWN (global input) INTEGER
* .FALSE.: WIN does not contain the eigenvalues
* .TRUE.: WIN does contain the eigenvalues
*
* UPLO (global input) CHARACTER*1
* Specifies whether the upper or lower triangular part of the
* Hermitian matrix A is stored:
* = 'U': Upper triangular
* = 'L': Lower triangular
*
* N (global input) INTEGER
* Size of the matrix to be tested. (global size)
*
* THRESH (global input) REAL
* A test will count as "failed" if the "error", computed as
* described below, exceeds THRESH. Note that the error
* is scaled to be O(1), so THRESH should be a reasonably
* small multiple of 1, e.g., 10 or 100. In particular,
* it should not depend on the precision (single vs. double)
* or the size of the matrix. It must be at least zero.
*
* ABSTOL (global input) REAL
* The absolute tolerance for the eigenvalues. An
* eigenvalue is considered to be located if it has
* been determined to lie in an interval whose width
* is "abstol" or less. If "abstol" is less than or equal
* to zero, then ulp*|T| will be used, where |T| is
* the 1-norm of the matrix. If eigenvectors are
* desired later by inverse iteration ("PCSTEIN"),
* "abstol" MUST NOT be bigger than ulp*|T|.
*
* A (local workspace) COMPLEX array
* global dimension (N, N), local dimension (DESCA(DLEN_), NQ)
* A is distributed in a block cyclic manner over both rows
* and columns.
* See PCHEEVD for a description of block cyclic layout.
* The test matrix, which is then modified by PCHEEVD
* A has already been padded front and back, use A(1+IPREPAD)
*
* COPYA (local input) COMPLEX array, dimension(N*N)
* COPYA holds a copy of the original matrix A
* identical in both form and content to A
*
* Z (local workspace) COMPLEX array, dim (N*N)
* Z is distributed in the same manner as A
* Z contains the eigenvector matrix
* Z is used as workspace by the test routines
* PCSEPCHK and PCSEPQTQ.
* Z has already been padded front and back, use Z(1+IPREPAD)
*
* IA (global input) INTEGER
* On entry, IA specifies the global row index of the submatrix
* of the global matrix A, COPYA and Z to operate on.
*
* JA (global input) INTEGER
* On entry, IA specifies the global column index of the submat
* of the global matrix A, COPYA and Z to operate on.
*
* DESCA (global/local input) INTEGER array of dimension 8
* The array descriptor for the matrix A, COPYA and Z.
*
* WIN (global input) REAL array, dimension (N)
* If .not. WKNOWN, WIN is ignored on input
* Otherwise, WIN() is taken as the standard by which the
* eigenvalues are to be compared against.
*
* WNEW (global workspace) REAL array, dimension (N)
* The eigenvalues as copmuted by this call to PCHEEVD
* If JOBZ <> 'V' or RANGE <> 'A' these eigenvalues are
* compared against those in WIN().
* WNEW has already been padded front and back,
* use WNEW(1+IPREPAD)
*
* WORK (local workspace) COMPLEX array, dimension (LWORK)
* WORK has already been padded front and back,
* use WORK(1+IPREPAD)
*
* LWORK (local input) INTEGER
* The actual length of the array WORK after padding.
*
* RWORK (local workspace) REAL array, dimension (LRWORK)
* RWORK has already been padded front and back,
* use RWORK(1+IPREPAD)
*
* LRWORK (local input) INTEGER
* The actual length of the array RWORK after padding.
*
* LWORK1 (local input) INTEGER
* The amount of real workspace to pass to PCHEEVD
*
* IWORK (local workspace) INTEGER array, dimension (LIWORK)
* IWORK has already been padded front and back,
* use IWORK(1+IPREPAD)
*
* LIWORK (local input) INTEGER
* The length of the array IWORK after padding.
*
* RESULT (global output) INTEGER
* The result of this call to PCHEEVD
* RESULT = -3 => This process did not participate
* RESULT = 0 => All tests passed
* RESULT = 1 => ONe or more tests failed
*
* TSTNRM (global output) REAL
* |AQ- QL| / (ABSTOL+EPS*|A|)*N
*
* QTQNRM (global output) REAL
* |QTQ -I| / N*EPS
*
* .. Parameters ..
*
INTEGER BLOCK_CYCLIC_2D, DLEN_, DTYPE_, CTXT_, M_, N_,
$ MB_, NB_, RSRC_, CSRC_, LLD_
PARAMETER ( BLOCK_CYCLIC_2D = 1, DLEN_ = 9, DTYPE_ = 1,
$ CTXT_ = 2, M_ = 3, N_ = 4, MB_ = 5, NB_ = 6,
$ RSRC_ = 7, CSRC_ = 8, LLD_ = 9 )
REAL PADVAL, FIVE, NEGONE
PARAMETER ( PADVAL = 13.5285E+0, FIVE = 5.0E+0,
$ NEGONE = -1.0E+0 )
COMPLEX CPADVAL
PARAMETER ( CPADVAL = ( 13.989E+0, 1.93E+0 ) )
INTEGER IPADVAL
PARAMETER ( IPADVAL = 927 )
COMPLEX CZERO, CONE, CNEGONE
PARAMETER ( CZERO = 0.0E+0, CONE = 1.0E+0,
$ CNEGONE = -1.0E+0 )
* ..
* .. Local Scalars ..
INTEGER I, IAM, INFO, ISIZEHEEVD, ISIZEHEEVX,
$ ISIZESUBTST, ISIZETST, MYCOL, MYROW, NP, NPCOL,
$ NPROW, NQ, RES, RSIZECHK, RSIZEHEEVD,
$ RSIZEHEEVX, RSIZEQTQ, RSIZESUBTST, RSIZETST,
$ SIZEHEEVD, SIZEHEEVX, SIZEMQRLEFT,
$ SIZEMQRRIGHT, SIZEQRF, SIZESUBTST, SIZETMS,
$ SIZETST
REAL EPS, EPSNORMA, ERROR, MAXERROR, MINERROR, NORM,
$ NORMWIN, SAFMIN, ULP
* ..
* .. Local Arrays ..
INTEGER ITMP( 2 )
* ..
* .. External Functions ..
*
INTEGER NUMROC
REAL PCLANGE, PCLANHE, PSLAMCH
EXTERNAL NUMROC, PCLANGE, PCLANHE, PSLAMCH
* ..
* .. External Subroutines ..
EXTERNAL BLACS_GRIDINFO, CLACPY, IGAMN2D, IGAMX2D,
$ PCCHEKPAD, PCFILLPAD, PCGEMM, PCHEEVD, PCLASET,
$ PCLASIZESEP, PCSEPCHK, PICHEKPAD, PIFILLPAD,
$ PSCHEKPAD, PSFILLPAD, SLBOOT, SLTIMER
* ..
* .. Intrinsic Functions ..
INTRINSIC ABS, MAX, MIN, REAL
* ..
* .. Executable Statements ..
* This is just to keep ftnchek happy
IF( BLOCK_CYCLIC_2D*CSRC_*CTXT_*DLEN_*DTYPE_*LLD_*MB_*M_*NB_*N_*
$ RSRC_.LT.0 )RETURN
*
CALL PCLASIZESEP( DESCA, IPREPAD, IPOSTPAD, SIZEMQRLEFT,
$ SIZEMQRRIGHT, SIZEQRF, SIZETMS, RSIZEQTQ,
$ RSIZECHK, SIZEHEEVX, RSIZEHEEVX, ISIZEHEEVX,
$ SIZEHEEVD, RSIZEHEEVD, ISIZEHEEVD, SIZESUBTST,
$ RSIZESUBTST, ISIZESUBTST, SIZETST, RSIZETST,
$ ISIZETST )
*
TSTNRM = NEGONE
QTQNRM = NEGONE
EPS = PSLAMCH( DESCA( CTXT_ ), 'Eps' )
SAFMIN = PSLAMCH( DESCA( CTXT_ ), 'Safe min' )
*
NORMWIN = SAFMIN / EPS
IF( N.GE.1 )
$ NORMWIN = MAX( ABS( WIN( 1+IPREPAD ) ),
$ ABS( WIN( N+IPREPAD ) ), NORMWIN )
*
DO 10 I = 1, LWORK1, 1
RWORK( I+IPREPAD ) = 14.3E+0
10 CONTINUE
DO 20 I = 1, LIWORK, 1
IWORK( I ) = 14
20 CONTINUE
DO 30 I = 1, LWORK, 1
WORK( I+IPREPAD ) = ( 15.63E+0, 1.1E+0 )
30 CONTINUE
*
DO 40 I = 1, N
WNEW( I+IPREPAD ) = 3.14159E+0
40 CONTINUE
*
CALL BLACS_GRIDINFO( DESCA( CTXT_ ), NPROW, NPCOL, MYROW, MYCOL )
*
IAM = 1
IF( MYROW.EQ.0 .AND. MYCOL.EQ.0 )
$ IAM = 0
*
* If this process is not involved in this test, bail out now
*
RESULT = -3
IF( MYROW.GE.NPROW .OR. MYROW.LT.0 )
$ GO TO 60
RESULT = 0
*
NP = NUMROC( N, DESCA( MB_ ), MYROW, 0, NPROW )
NQ = NUMROC( N, DESCA( NB_ ), MYCOL, 0, NPCOL )
*
CALL CLACPY( 'A', NP, NQ, COPYA, DESCA( LLD_ ), A( 1+IPREPAD ),
$ DESCA( LLD_ ) )
*
CALL PCFILLPAD( DESCA( CTXT_ ), NP, NQ, A, DESCA( LLD_ ), IPREPAD,
$ IPOSTPAD, CPADVAL )
*
CALL PCFILLPAD( DESCA( CTXT_ ), NP, NQ, Z, DESCA( LLD_ ), IPREPAD,
$ IPOSTPAD, CPADVAL+1.0E+0 )
*
CALL PSFILLPAD( DESCA( CTXT_ ), N, 1, WNEW, N, IPREPAD, IPOSTPAD,
$ PADVAL+2.0E+0 )
*
CALL PSFILLPAD( DESCA( CTXT_ ), LWORK1, 1, RWORK, LWORK1, IPREPAD,
$ IPOSTPAD, PADVAL+4.0E+0 )
*
CALL PIFILLPAD( DESCA( CTXT_ ), LIWORK, 1, IWORK, LIWORK, IPREPAD,
$ IPOSTPAD, IPADVAL )
*
CALL PCFILLPAD( DESCA( CTXT_ ), LWORK, 1, WORK, LWORK, IPREPAD,
$ IPOSTPAD, CPADVAL+4.1E+0 )
*
CALL SLBOOT
CALL SLTIMER( 1 )
CALL SLTIMER( 6 )
*
CALL PCHEEVD( 'V', UPLO, N, A( 1+IPREPAD ), IA, JA, DESCA,
$ WNEW( 1+IPREPAD ), Z( 1+IPREPAD ), IA, JA, DESCA,
$ WORK( 1+IPREPAD ), SIZEHEEVD, RWORK( 1+IPREPAD ),
$ LWORK1, IWORK( 1+IPREPAD ), LIWORK, INFO )
CALL SLTIMER( 6 )
CALL SLTIMER( 1 )
*
IF( THRESH.LE.0 ) THEN
RESULT = 0
ELSE
CALL PCCHEKPAD( DESCA( CTXT_ ), 'PCHEEVD-A', NP, NQ, A,
$ DESCA( LLD_ ), IPREPAD, IPOSTPAD, CPADVAL )
*
CALL PCCHEKPAD( DESCA( CTXT_ ), 'PCHEEVD-Z', NP, NQ, Z,
$ DESCA( LLD_ ), IPREPAD, IPOSTPAD,
$ CPADVAL+1.0E+0 )
*
CALL PSCHEKPAD( DESCA( CTXT_ ), 'PCHEEVD-WNEW', N, 1, WNEW, N,
$ IPREPAD, IPOSTPAD, PADVAL+2.0E+0 )
*
CALL PSCHEKPAD( DESCA( CTXT_ ), 'PCHEEVD-rWORK', LWORK1, 1,
$ RWORK, LWORK1, IPREPAD, IPOSTPAD,
$ PADVAL+4.0E+0 )
*
CALL PCCHEKPAD( DESCA( CTXT_ ), 'PCHEEVD-WORK', LWORK, 1, WORK,
$ LWORK, IPREPAD, IPOSTPAD, CPADVAL+4.1E+0 )
*
CALL PICHEKPAD( DESCA( CTXT_ ), 'PCHEEVD-IWORK', LIWORK, 1,
$ IWORK, LIWORK, IPREPAD, IPOSTPAD, IPADVAL )
*
* Check INFO
*
* Make sure that all processes return the same value of INFO
*
ITMP( 1 ) = INFO
ITMP( 2 ) = INFO
*
CALL IGAMN2D( DESCA( CTXT_ ), 'a', ' ', 1, 1, ITMP, 1, 1, 1,
$ -1, -1, 0 )
CALL IGAMX2D( DESCA( CTXT_ ), 'a', ' ', 1, 1, ITMP( 2 ), 1, 1,
$ 1, -1, -1, 0 )
*
*
IF( ITMP( 1 ).NE.ITMP( 2 ) ) THEN
IF( IAM.EQ.0 )
$ WRITE( NOUT, FMT = * )
$ 'Different processes return different INFO'
RESULT = 1
ELSE IF( INFO.NE.0 ) THEN
IF( IAM.EQ.0 )
$ WRITE( NOUT, FMT = 9996 )INFO
RESULT = 1
END IF
*
* Compute eps * norm(A)
*
IF( N.EQ.0 ) THEN
EPSNORMA = EPS
ELSE
EPSNORMA = PCLANHE( 'I', UPLO, N, COPYA, IA, JA, DESCA,
$ RWORK )*EPS
END IF
*
* Note that a couple key variables get redefined in PCSEPCHK
* as described by this table:
*
* PCSEPTST name PCSEPCHK name
* ------------- -------------
* COPYA A
* Z Q
* A C
*
* Perform the |AQ - QE| test
*
CALL PSFILLPAD( DESCA( CTXT_ ), RSIZECHK, 1, RWORK, RSIZECHK,
$ IPREPAD, IPOSTPAD, 4.3E+0 )
*
CALL PCSEPCHK( N, N, COPYA, IA, JA, DESCA,
$ MAX( ABSTOL+EPSNORMA, SAFMIN ), THRESH,
$ Z( 1+IPREPAD ), IA, JA, DESCA, A( 1+IPREPAD ),
$ IA, JA, DESCA, WNEW( 1+IPREPAD ),
$ RWORK( 1+IPREPAD ), RSIZECHK, TSTNRM, RES )
*
CALL PSCHEKPAD( DESCA( CTXT_ ), 'PCSDPCHK-rWORK', RSIZECHK, 1,
$ RWORK, RSIZECHK, IPREPAD, IPOSTPAD, 4.3E+0 )
*
IF( RES.NE.0 ) THEN
RESULT = 1
WRITE( NOUT, FMT = 9995 )
END IF
*
* Perform the |QTQ - I| test
*
CALL PSFILLPAD( DESCA( CTXT_ ), RSIZEQTQ, 1, RWORK, RSIZEQTQ,
$ IPREPAD, IPOSTPAD, 4.3E+0 )
*
*
RES = 0
ULP = PSLAMCH( DESCA( CTXT_ ), 'P' )
CALL PCLASET( 'A', N, N, CZERO, CONE, A( 1+IPREPAD ), IA, JA,
$ DESCA )
CALL PCGEMM( 'Conjugate transpose', 'N', N, N, N, CNEGONE,
$ Z( 1+IPREPAD ), IA, JA, DESCA, Z( 1+IPREPAD ), IA,
$ JA, DESCA, CONE, A( 1+IPREPAD ), IA, JA, DESCA )
NORM = PCLANGE( '1', N, N, A( 1+IPREPAD ), IA, JA, DESCA,
$ WORK( 1+IPREPAD ) )
QTQNRM = NORM / ( REAL( MAX( N, 1 ) )*ULP )
IF( QTQNRM.GT.THRESH ) THEN
RES = 1
END IF
CALL PSCHEKPAD( DESCA( CTXT_ ), 'PCSEPQTQ-rWORK', RSIZEQTQ, 1,
$ RWORK, RSIZEQTQ, IPREPAD, IPOSTPAD, 4.3E+0 )
*
IF( RES.NE.0 ) THEN
RESULT = 1
WRITE( NOUT, FMT = 9994 )
END IF
*
IF( INFO.NE.0 ) THEN
IF( IAM.EQ.0 )
$ WRITE( NOUT, FMT = 9998 )INFO
RESULT = 1
END IF
*
IF( INFO.NE.0 ) THEN
IF( IAM.EQ.0 )
$ WRITE( NOUT, FMT = 9998 )INFO
RESULT = 1
END IF
END IF
*
* Check to make sure that we have the right eigenvalues
*
IF( WKNOWN .AND. N.GT.0 ) THEN
*
* Find the largest difference between the computed
* and expected eigenvalues
*
MINERROR = NORMWIN
MAXERROR = 0.0
*
DO 50 I = 1, N
ERROR = ABS( WIN( I+IPREPAD )-WNEW( I+IPREPAD ) )
MAXERROR = MAX( MAXERROR, ERROR )
50 CONTINUE
MINERROR = MIN( MAXERROR, MINERROR )
*
IF( MINERROR.GT.NORMWIN*FIVE*THRESH*EPS ) THEN
IF( IAM.EQ.0 )
$ WRITE( NOUT, FMT = 9997 )MINERROR, NORMWIN
RESULT = 1
END IF
END IF
*
*
* All processes should report the same result
*
CALL IGAMX2D( DESCA( CTXT_ ), 'a', ' ', 1, 1, RESULT, 1, 1, 1, -1,
$ -1, 0 )
*
60 CONTINUE
*
RETURN
*
9999 FORMAT( 'PCHEEVD returned INFO=', I7 )
9998 FORMAT( 'PCSEPQTQ returned INFO=', I7 )
9997 FORMAT( 'PCSDPSUBTST minerror =', D11.2, ' normwin=', D11.2 )
9996 FORMAT( 'PCHEEVD returned INFO=', I7,
$ ' despite adequate workspace' )
9995 FORMAT( 'PCHEEVD failed the |AQ -QE| test' )
9994 FORMAT( 'PCHEEVD failed the |QTQ -I| test' )
*
* End of PCSDPSUBTST
*
END
|
