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decard



Joined: 11 Sep 2003
Posts: 1092
Location: Poland
decard
Hi,
does anyone know some (easy) way of measuring how much clock cycles it takes to execute some piece of code?
thanks
Post 26 Jun 2004, 13:03
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roticv



Joined: 19 Jun 2003
Posts: 374
Location: Singapore
roticv
Post 26 Jun 2004, 14:06
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Ralph



Joined: 04 Oct 2003
Posts: 86
Ralph
rdtsc works well for that. It will return the current cycle count in EDX:EAX. Ideally you'll want to use cpuid to serialize the cpu so rdtsc does not execute out of order, and turn off interrupts so you don't get multitasking interference, unless you want that.
Post 26 Jun 2004, 19:41
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