Re: [RFC] renicing X

[Nick Piggin]

Felipe Alfaro Solana wrote:

> On Mon, 2003-08-25 at 18:00, Nick Piggin wrote:
>
> > My scheduler patch really benefits a lot from renicing X. I
> > think its because it nices more nicely. Any reasons why this
> > might be a bad idea?

Hi Felipe,
Sorry I can't mail you directly. Some spam filter doesn't like me.

> Well, not for me... Although renicing X with Con patches makes X feel
> horrible, with your patches is not as horrible. However, I feel X much
> smoother with X reniced at +0. Renicing X at -20, for example, may
> reduce mouse cursor jumpiness under load, but makes X feel a little
> jerky in general (window movement is not as smooth as with X niced at
> +0). This is, however, based on subjective testing, not actual numbers.

Hmm interesting. Might be a bug...

> But for interactivity, most of the time it's the subjective feeling of
> the user about the system what matters, not numbers.

Yep

> And now we're talking about sched-policy-7a: under heavy load, spawning
> new processes still takes twice the time it takes when the system is
> under no load. For example, spawning a new Konsole session (not a new
> Konsole process, but a new session tab inside Konsole) takes approx. 1
> second on my P3-700Mhz. However, with sched-policy-7a and under heavy
> load (the mad while true; do a=2; done loop), it takes more than 2
> seconds.

OK thanks. I'll try to work on this.

> In general, sched-policy-7a feels extremely smooth and responsive in
> general but, for me, Con patches offer the smoothest X experience I have
> ever felt until date. Anyways, I will keep testing your patches and I
> greatly encourage you to keep improving them. It's always good to have
> diversity :-)

Well thats good. Thanks very much.

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