Re: Help understanding slow down

Andrew Morton
2004-05-25T09:30:20Z

Ingo Molnar <mingo@elte.hu> wrote:
>
> with the patch below we will print a big fat warning. (I did not want to
> deny idle=poll altogether - future HT implementations might work fine
> with polling idle.)

idle=poll is handy when profiling the kernel with oprofile clock-unhalted
events. Because if you use the normal halt-based idle loop no profile
"ticks" are accounted to idle time at all and the results are really hard
to understand.