Re: RT patch acceptance

[Ingo Molnar]

* Nick Piggin <nickpiggin@xxxxxxxxxxxx> 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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/