SECONDR(3F) Last changed: 2-24-98
NAME
SECONDR - Returns elapsed wall-clock time in seconds
SYNOPSIS
All systems:
REAL (KIND=8) SECONDR
time=SECONDR( )
UNICOS systems:
CALL SECONDR(time)IMPLEMENTATION
UNICOS, UNICOS/mk, and IRIX systems
DESCRIPTION
On IRIX systems, this routine is in libffio.so which is linked by
default when compiling programs with the MIPSpro 7 Fortran 90 compiler
or when compiling programs with the -craylibs option to the MIPSpro
7.2 F77 compiler.
SECONDR can be called several times during the execution of a program
to determine the amount of elapsed wall-clock time.
time is the real-time clock values in floating-point seconds. If the
value of the real-time clock exceeds 48 bits, some accuracy may be
lost during the conversion to float. The argument must be of type
real with KIND=8.
On UNICOS/mk systems, the real-time clocks on processing elements are
not synchronized with each other. Therefore, a SECONDR() value should
not be compared to a previous SECONDR() taken on a different
processing element.
EXAMPLES
This example calculates the elapsed wall-clock time from the first
call to SECONDR until the second call to SECONDR.
BEFORE = SECONDR( )
CALL DOWORK ( )
AFTER = SECONDR( )
WALTIM = AFTER - BEFORE
SEE ALSORTC(3I), SECOND(3F), TIMEF(3F), TSECND(3F)
Application Programmer's Library Reference Manual, publication
SR-2165, for the printed version of this man page.
