Author: James Robertson
Date: 10:22:27 08/09/00
Go up one level in this thread
On August 08, 2000 at 23:33:49, Larry Griffiths wrote:
>I use the Read time stamp counter in my program sometimes, it looks like this...
>
>
>#ifdef INCLUDE_TIMERS
>#define StartTimer(start)\
> {\
> asm\
> {\
> db 0fh,31h;\
> mov dword ptr start+4,EDX;\
> mov dword ptr start,EAX;\
> }\
> }
>#define StopTimer(stop)\
> {\
> asm\
> {\
> db 0fh,31h;\
> mov dword ptr stop+4,EDX;\
> mov dword ptr stop,EAX;\
> }\
> }
>#endif
>
>unsigned __int64 rdtscstart;
>unsigned __int64 rdtscstop;
>unsigned __int64 rdtscelapsed=0;
>
>StartTimer(rdtscstart);
>... code goes here...
>StopTimer(rdtscstop);
>
>rdtscelapsed=rdtscstop-rdtscstart;
>
>// the 550,000,000 is the clock speed of my processor.
>
>double dresult=(double)rdtscelapsed/(double)550000000;
>char result[64];
>sprintf(result,"%f",dresult);
>
>Larry.
Thanks. I'll try this out.... :)
James
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