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<TITLE>HPL_ptimer HPL 2.0 Library Functions September 10, 2008</TITLE> |
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<BODY BGCOLOR="WHITE" TEXT = "#000000" LINK = "#0000ff" VLINK = "#000099" |
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ALINK = "#ffff00"> |
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<H1>Name</H1> |
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<B>HPL_ptimer</B> Timer facility. |
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<H1>Synopsis</H1> |
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<CODE>#include "hpl.h"</CODE><BR><BR> |
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<CODE>void</CODE> |
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<CODE>HPL_ptimer(</CODE> |
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<CODE>const int</CODE> |
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<CODE>I</CODE> |
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<CODE>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_ptimer</B> |
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provides a "stopwatch" functionality cpu/wall timer in |
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seconds. Up to 64 separate timers can be functioning at once. The |
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first call starts the timer, and the second stops it. This routine |
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can be disenabled by calling HPL_ptimer_disable(), so that calls to |
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the timer are ignored. This feature can be used to make sure certain |
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sections of code do not affect timings, even if they call routines |
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which have HPL_ptimer calls in them. HPL_ptimer_enable() will enable |
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the timer functionality. One can retrieve the current value of a |
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timer by calling |
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t0 = HPL_ptimer_inquire( HPL_WALL_TIME | HPL_CPU_TIME, I ) |
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where I is the timer index in [0..64). To inititialize the timer |
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functionality, one must have called HPL_ptimer_boot() prior to any of |
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the functions mentioned above. |
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<H1>Arguments</H1> |
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<PRE>
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I (global input) const int |
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On entry, I specifies the timer to stop/start. |
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</PRE>
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<H1>See Also</H1> |
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<A HREF="HPL_ptimer_cputime.html">HPL_ptimer_cputime</A>, |
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<A HREF="HPL_ptimer_walltime.html">HPL_ptimer_walltime</A>. |
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