Hello Kernel Brothers!! How are you??? So, I would like test the performance of my notebook, developing one or two utilities, and have a better mensurement about the speed. But it can help all of us. 1st: I would like mensure the speed making a counter (exacly bogomips? may be). Loop+counter during 1 tickrate. 2nd: The most interesting: How many memory cells in ram can we access during 1tickrate? How could we develop this?! Both utils may run in long mode (64bits). Well, in real mode too; so, we can compare the speed in the two modes! Some one knows how to develop a very small program/routine about that?! For the 2nd situation, a simple idea wrote in codesnipet form (consider the intention, not the sintax! there are bugs! I know. Intel syntax.) dw the_counter_cell 0 lea bx, the_counter_cell xor bx,bx label: inc [bx] # Could not be so simple like this, because the address can be cached. Right? loop label # breaked by an interruption. Just to express the intention. How could we create a small code for the 2nd situation, tring to force the processor to not use the cache? Regards. Peace out. -- Atenciosamente, Gustavo da Silva gustavodasilva@gmail.com