Re: RT patch acceptance

Ingo Molnar
2005-05-25T06:10:34Z

* Nick Piggin <nickpiggin@yahoo.com.au> wrote:

> Lee Revell wrote:
>
> > The IDE IRQ handler can in fact run for several ms, which people
> > sure can detect.
>
> Are you serious? Even at 10ms, the monitor refresh rate would have to
> be over 100Hz for anyone to "notice" anything, right?... [...]

you are assuming direct observation. Sure, a human (normally) doesnt
notice smaller than say 10-20 msec of lag. But, a human very much
notices indirect effects of latencies, such as the nasty 'click' a
soundcard produces if it overruns.

> What sort of numbers are you talking when you say several?

a couple of msecs easily even on fast boxes. Well over 10 msecs on
slower boxes.

Ingo