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SUBROUTINE SLBOOT()
*
* -- ScaLAPACK tools routine (version 1.7) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* May 1, 1997
*
* Purpose
* =======
*
* SLBOOT (re)sets all timers to 0, and enables SLtimer.
*
* =====================================================================
*
* .. Parameters ..
INTEGER NTIMER
PARAMETER ( NTIMER = 64 )
DOUBLE PRECISION STARTFLAG, ZERO
PARAMETER ( STARTFLAG = -5.0D+0, ZERO = 0.0D+0 )
* ..
* .. Local Scalars ..
INTEGER I
* ..
* .. Common Blocks ..
LOGICAL DISABLED
DOUBLE PRECISION CPUSEC( NTIMER ), CPUSTART( NTIMER ),
$ WALLSEC( NTIMER ), WALLSTART( NTIMER )
COMMON /SLTIMER00/ CPUSEC, WALLSEC, CPUSTART, WALLSTART, DISABLED
* ..
* .. Executable Statements ..
*
DISABLED = .FALSE.
DO 10 I = 1, NTIMER
CPUSEC( I ) = ZERO
WALLSEC( I ) = ZERO
CPUSTART( I ) = STARTFLAG
WALLSTART( I ) = STARTFLAG
10 CONTINUE
*
RETURN
*
* End of SLBOOT
*
END
*
SUBROUTINE SLTIMER( I )
*
* -- ScaLAPACK tools routine (version 1.7) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* May 1, 1997
*
* .. Scalar Arguments ..
INTEGER I
* ..
*
* Purpose
* =======
*
* SLtimer provides a "stopwatch" functionality cpu/wall timer
* (in seconds). Up to 64 separate timers can be functioning at once.
* The first call starts the timer, and the second stops it. This
* routine can be disenabled, so that calls to the timer are ignored.
* This feature can be used to make sure certain sections of code do
* not affect timings, even if they call routines which have SLtimer
* calls in them.
*
* Arguments
* =========
*
* I (global input) INTEGER
* The timer to stop/start.
*
* =====================================================================
*
* .. Parameters ..
INTEGER NTIMER
PARAMETER ( NTIMER = 64 )
DOUBLE PRECISION STARTFLAG
PARAMETER ( STARTFLAG = -5.0D+0 )
* ..
* .. External Functions ..
DOUBLE PRECISION DCPUTIME00, DWALLTIME00
EXTERNAL DCPUTIME00, DWALLTIME00
* ..
* .. Common Blocks ..
LOGICAL DISABLED
DOUBLE PRECISION CPUSEC( NTIMER ), CPUSTART( NTIMER ),
$ WALLSEC( NTIMER ), WALLSTART( NTIMER )
COMMON /SLTIMER00/ CPUSEC, WALLSEC, CPUSTART, WALLSTART, DISABLED
* ..
* .. Executable Statements ..
*
* If timing disabled, return
*
IF( DISABLED )
$ RETURN
*
IF( WALLSTART( I ).EQ.STARTFLAG ) THEN
*
* If timer has not been started, start it
*
WALLSTART( I ) = DWALLTIME00()
CPUSTART( I ) = DCPUTIME00()
*
ELSE
*
* Stop timer and add interval to count
*
CPUSEC( I ) = CPUSEC( I ) + DCPUTIME00() - CPUSTART( I )
WALLSEC( I ) = WALLSEC( I ) + DWALLTIME00() - WALLSTART( I )
WALLSTART( I ) = STARTFLAG
*
END IF
*
RETURN
*
* End of SLTIMER
*
END
*
SUBROUTINE SLENABLE()
*
* -- ScaLAPACK tools routine (version 1.7) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* May 1, 1997
*
* Purpose
* =======
*
* SLENABLE sets it so calls to SLtimer are not ignored.
*
* =====================================================================
*
* .. Parameters ..
INTEGER NTIMER
PARAMETER ( NTIMER = 64 )
* ..
* .. Common Blocks ..
LOGICAL DISABLED
DOUBLE PRECISION CPUSEC( NTIMER ), CPUSTART( NTIMER ),
$ WALLSEC( NTIMER ), WALLSTART( NTIMER )
COMMON /SLTIMER00/ CPUSEC, WALLSEC, CPUSTART, WALLSTART, DISABLED
* ..
* .. Executable Statements ..
*
DISABLED = .FALSE.
*
RETURN
*
END
*
SUBROUTINE SLDISABLE()
*
* -- ScaLAPACK tools routine (version 1.7) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* May 1, 1997
*
* Purpose
* =======
*
* SLDISABLE sets it so calls to SLTIMER are ignored.
*
* =====================================================================
*
* .. Parameters ..
INTEGER NTIMER
PARAMETER ( NTIMER = 64 )
* ..
* .. Common Blocks ..
LOGICAL DISABLED
DOUBLE PRECISION CPUSEC( NTIMER ), CPUSTART( NTIMER ),
$ WALLSEC( NTIMER ), WALLSTART( NTIMER )
COMMON /SLTIMER00/ CPUSEC, WALLSEC, CPUSTART, WALLSTART, DISABLED
* ..
* .. Executable Statements ..
*
DISABLED = .TRUE.
*
RETURN
*
* End of SLDISABLE
*
END
*
DOUBLE PRECISION FUNCTION SLINQUIRE( TIMETYPE, I )
*
* -- ScaLAPACK tools routine (version 1.7) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* May 1, 1997
*
* .. Scalar Arguments ..
CHARACTER*1 TIMETYPE
INTEGER I
* ..
*
* Purpose
* =======
*
* SLINQUIRE returns wall or cpu time that has accumulated in timer I.
*
* Arguments
* =========
*
* TIMETYPE (global input) CHARACTER
* Controls what time will be returned:
* = 'W': wall clock time is returned,
* = 'C': CPU time is returned (default).
*
* I (global input) INTEGER
* The timer to return.
*
* =====================================================================
*
* .. Parameters ..
INTEGER NTIMER
PARAMETER ( NTIMER = 64 )
DOUBLE PRECISION ERRFLAG
PARAMETER ( ERRFLAG = -1.0D+0 )
* ..
* .. Local Scalars ..
DOUBLE PRECISION TIME
* ..
* .. External Functions ..
LOGICAL LSAME
DOUBLE PRECISION DCPUTIME00, DWALLTIME00
EXTERNAL DCPUTIME00, DWALLTIME00, LSAME
* ..
* .. Common Blocks ..
LOGICAL DISABLED
DOUBLE PRECISION CPUSEC( NTIMER ), CPUSTART( NTIMER ),
$ WALLSEC( NTIMER ), WALLSTART( NTIMER )
COMMON /SLTIMER00/ CPUSEC, WALLSEC, CPUSTART, WALLSTART, DISABLED
* ..
* .. Executable Statements ..
*
IF( LSAME( TIMETYPE, 'W' ) ) THEN
*
* If walltime not available on this machine, return -1 flag
*
IF( DWALLTIME00().EQ.ERRFLAG ) THEN
TIME = ERRFLAG
ELSE
TIME = WALLSEC( I )
END IF
ELSE
IF( DCPUTIME00().EQ.ERRFLAG ) THEN
TIME = ERRFLAG
ELSE
TIME = CPUSEC( I )
END IF
END IF
*
SLINQUIRE = TIME
*
RETURN
*
* End of SLINQUIRE
*
END
*
SUBROUTINE SLCOMBINE( ICTXT, SCOPE, OP, TIMETYPE, N, IBEG,
$ TIMES )
*
* -- ScaLAPACK tools routine (version 1.7) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* May 1, 1997
*
* .. Scalar Arguments ..
CHARACTER OP, SCOPE, TIMETYPE
INTEGER IBEG, ICTXT, N
* ..
* .. Array Arguments ..
DOUBLE PRECISION TIMES( N )
* ..
*
* Purpose
* =======
*
* SLCOMBINE takes the timing information stored on a scope of processes
* and combines them into the user's TIMES array.
*
* Arguments
* =========
*
* ICTXT (local input) INTEGER
* The BLACS context handle.
*
* SCOPE (global input) CHARACTER
* Controls what processes in grid participate in combine.
* Options are 'Rowwise', 'Columnwise', or 'All'.
*
* OP (global input) CHARACTER
* Controls what combine should be done:
* = '>': get maximal time on any process (default),
* = '<': get minimal time on any process,
* = '+': get sum of times across processes.
*
* TIMETYPE (global input) CHARACTER
* Controls what time will be returned in TIMES:
* = 'W': wall clock time,
* = 'C': CPU time (default).
*
* N (global input) INTEGER
* The number of timers to combine.
*
* IBEG (global input) INTEGER
* The first timer to be combined.
*
* TIMES (global output) DOUBLE PRECISION array, dimension (N)
* The requested timing information is returned in this array.
*
* =====================================================================
*
* .. Parameters ..
INTEGER NTIMER
PARAMETER ( NTIMER = 64 )
DOUBLE PRECISION ERRFLAG
PARAMETER ( ERRFLAG = -1.0D+0 )
* ..
* .. Local Scalars ..
LOGICAL TMPDIS
INTEGER I
* ..
* .. External Subroutines ..
EXTERNAL DGAMX2D, DGAMN2D, DGSUM2D
* ..
* .. External Functions ..
LOGICAL LSAME
DOUBLE PRECISION DCPUTIME00, DWALLTIME00
EXTERNAL DCPUTIME00, DWALLTIME00, LSAME
* ..
* .. Common Blocks ..
LOGICAL DISABLED
DOUBLE PRECISION CPUSEC( NTIMER ), CPUSTART( NTIMER ),
$ WALLSEC( NTIMER ), WALLSTART( NTIMER )
COMMON /SLTIMER00/ CPUSEC, WALLSEC, CPUSTART, WALLSTART, DISABLED
* ..
* .. Executable Statements ..
*
* Disable timer for combine operation
*
TMPDIS = DISABLED
DISABLED = .TRUE.
*
* Copy timer information into user's times array
*
IF( LSAME( TIMETYPE, 'W' ) ) THEN
*
* If walltime not available on this machine, fill in times
* with -1 flag, and return
*
IF( DWALLTIME00().EQ.ERRFLAG ) THEN
DO 10 I = 1, N
TIMES( I ) = ERRFLAG
10 CONTINUE
RETURN
ELSE
DO 20 I = 1, N
TIMES( I ) = WALLSEC( IBEG + I - 1 )
20 CONTINUE
END IF
ELSE
IF( DCPUTIME00().EQ.ERRFLAG ) THEN
DO 30 I = 1, N
TIMES( I ) = ERRFLAG
30 CONTINUE
RETURN
ELSE
DO 40 I = 1, N
TIMES( I ) = CPUSEC( IBEG + I - 1 )
40 CONTINUE
END IF
ENDIF
*
* Combine all nodes' information, restore disabled, and return
*
IF( OP.EQ.'>' ) THEN
CALL DGAMX2D( ICTXT, SCOPE, ' ', N, 1, TIMES, N, -1, -1,
$ -1, -1, 0 )
ELSE IF( OP.EQ.'<' ) THEN
CALL DGAMN2D( ICTXT, SCOPE, ' ', N, 1, TIMES, N, -1, -1,
$ -1, -1, 0 )
ELSE IF( OP.EQ.'+' ) THEN
CALL DGSUM2D( ICTXT, SCOPE, ' ', N, 1, TIMES, N, -1, 0 )
ELSE
CALL DGAMX2D( ICTXT, SCOPE, ' ', N, 1, TIMES, N, -1, -1,
$ -1, -1, 0 )
END IF
*
DISABLED = TMPDIS
*
RETURN
*
* End of SLCOMBINE
*
END
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