Re: [patch] O(1) scheduler-H6/H7/I0 and nice +19

[Davide Libenzi]

On 15 Jan 2002, Robert Love wrote:

> On Tue, 2002-01-15 at 21:48, Ingo Molnar wrote:
>
> > there is a way: renicing. Either use nice +19 on the compilation job or
> > use nice -5 on the 'known good' tasks. Perhaps we should allow a nice
> > decrease of up to -5 from the default level - and things like KDE or Gnome
> > could renice interactive tasks, while things like compilation jobs would
> > run on the default priority.
>
> This isn't a bad idea, as long as we don't use it as a crutch or
> excuse.  That is, answer scheduling problems with "properly nice your
> tasks" -- the scheduler should be smart enough, to some degree.
>
> FWIW, Solaris actually implements a completely different scheduling
> policy, SCHED_INTERACT or something.  It is for windowed tasks in X --
> they get a large interactivity bonus.

Now ( with 2.5.3-pre1 ) intractivity is *very good* but SCHED_INTERACT
would help *a lot* to get things even more right.

- Davide