Re: [PATCH] linux-2.5.67_lost-tick-fix_A2

[john stultz]

On Wed, 2003-04-16 at 16:03, george anzinger wrote:
> john stultz wrote: 
> > Some of the divs and mods being added here might concern folks, but by
> > not calling timer->get_offset() in detect_lost_tick() we eliminate much
> > of the same math. I did some simple cycle counting and the new code
> > comes out on average equivalent or faster. 
> 
> I think that if you look at the generated code you may find that there 
> are NO div in the asm code.  The C folks know about scaling to avoid 
> div especially when the divisor is a constant :)

Indeed you are correct. An objdump of both the timer_tsc.o and
timer_cyclone.o code reveals that the only divs occur in init code. I
like your argument better then mine :)

thanks
-john