measuring clock cycles...

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decard

Joined: 11 Sep 2003
Posts: 1092
Location: Poland

decard 26 Jun 2004, 13:03

Hi,
does anyone know some (easy) way of measuring how much clock cycles it takes to execute some piece of code?
thanks

26 Jun 2004, 13:03

roticv

Joined: 19 Jun 2003
Posts: 374
Location: Singapore

roticv 26 Jun 2004, 14:06

Take a look at http://board.flatassembler.net/topic.php?t=496

26 Jun 2004, 14:06

Ralph

Joined: 04 Oct 2003
Posts: 86

Ralph 26 Jun 2004, 19:41

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.

26 Jun 2004, 19:41

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