HPL_ptimer man page

HPL_ptimer — Timer facility.


#include "hpl.h"
 void HPL_ptimer( const int I );


HPL_ptimer 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  by calling HPL_ptimer_disable(),  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 HPL_ptimer calls in them. HPL_ptimer_enable()  will enable the  timer  functionality.  One  can retrieve  the current value of a timer by calling
 t0 = HPL_ptimer_inquire( HPL_WALL_TIME | HPL_CPU_TIME, I )
 where  I  is the timer index in  [0..64).  To  inititialize the timer functionality, one must have called HPL_ptimer_boot() prior to any of the functions mentioned above.


I       (global input)          const int

On entry, I specifies the timer to stop/start.

See Also

HPL_ptimer_cputime (3), HPL_ptimer_walltime (3).


October 26, 2012 HPL 2.1 HPL Library Functions