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| 2 | 1 | equemene | <HEAD>
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| 3 | 1 | equemene | <TITLE>HPL_ptimer HPL 2.0 Library Functions September 10, 2008</TITLE> |
| 4 | 1 | equemene | </HEAD>
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| 9 | 1 | equemene | <H1>Name</H1> |
| 10 | 1 | equemene | <B>HPL_ptimer</B> Timer facility. |
| 11 | 1 | equemene | |
| 12 | 1 | equemene | <H1>Synopsis</H1> |
| 13 | 1 | equemene | <CODE>#include "hpl.h"</CODE><BR><BR> |
| 14 | 1 | equemene | <CODE>void</CODE> |
| 15 | 1 | equemene | <CODE>HPL_ptimer(</CODE> |
| 16 | 1 | equemene | <CODE>const int</CODE> |
| 17 | 1 | equemene | <CODE>I</CODE> |
| 18 | 1 | equemene | <CODE>);</CODE> |
| 19 | 1 | equemene | |
| 20 | 1 | equemene | <H1>Description</H1> |
| 21 | 1 | equemene | <B>HPL_ptimer</B> |
| 22 | 1 | equemene | provides a "stopwatch" functionality cpu/wall timer in |
| 23 | 1 | equemene | seconds. Up to 64 separate timers can be functioning at once. The |
| 24 | 1 | equemene | first call starts the timer, and the second stops it. This routine |
| 25 | 1 | equemene | can be disenabled by calling HPL_ptimer_disable(), so that calls to |
| 26 | 1 | equemene | the timer are ignored. This feature can be used to make sure certain |
| 27 | 1 | equemene | sections of code do not affect timings, even if they call routines |
| 28 | 1 | equemene | which have HPL_ptimer calls in them. HPL_ptimer_enable() will enable |
| 29 | 1 | equemene | the timer functionality. One can retrieve the current value of a |
| 30 | 1 | equemene | timer by calling |
| 31 | 1 | equemene | |
| 32 | 1 | equemene | t0 = HPL_ptimer_inquire( HPL_WALL_TIME | HPL_CPU_TIME, I ) |
| 33 | 1 | equemene | |
| 34 | 1 | equemene | where I is the timer index in [0..64). To inititialize the timer |
| 35 | 1 | equemene | functionality, one must have called HPL_ptimer_boot() prior to any of |
| 36 | 1 | equemene | the functions mentioned above. |
| 37 | 1 | equemene | |
| 38 | 1 | equemene | <H1>Arguments</H1> |
| 39 | 1 | equemene | <PRE>
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| 40 | 1 | equemene | I (global input) const int |
| 41 | 1 | equemene | On entry, I specifies the timer to stop/start. |
| 42 | 1 | equemene | </PRE>
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| 43 | 1 | equemene | |
| 44 | 1 | equemene | <H1>See Also</H1> |
| 45 | 1 | equemene | <A HREF="HPL_ptimer_cputime.html">HPL_ptimer_cputime</A>, |
| 46 | 1 | equemene | <A HREF="HPL_ptimer_walltime.html">HPL_ptimer_walltime</A>. |
| 47 | 1 | equemene | |
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