lkml.org 
[lkml]   [2003]   [Aug]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] O13int for interactivity
Date
On Tue, 5 Aug 2003 19:09, Mike Galbraith wrote:
> At 06:43 PM 8/5/2003 +1000, Con Kolivas wrote:
> >On Tue, 5 Aug 2003 18:27, Mike Galbraith wrote:
> > > At 06:20 PM 8/5/2003 +1000, Con Kolivas wrote:
> > > >Every experiment I've tried at putting tasks at the start of the queue
> > > >instead
> > > >of the end has resulted in some form of starvation so should not be
> > > > possible for any user task and I've abandoned it.
> > >
> > > (ditto:)
> >
> >Superuser access real time tasks may be worth reconsidering though...
>
> If they were guaranteed ultra-light, maybe, but userland is just not
> trustworthy.

Agreed

> Better imho would be something like Davide's SOFT_RR with an additional
> automatic priority adjust per cpu usage or something (cpu usage being a
> [very] little bit of a latency hint, and a great 'hurt me' hint). Best
> would be an API that allowed userland applications to describe their
> latency requirements explicitly, with the scheduler watching users of this
> API like a hawk, ever ready to sanction abusers. Anything I think about in
> this area gets uncomfortably close to hard rt though, and all of the wisdom
> I've heard on LKLM over the years wrt separation of problem spaces comes
> flooding back.

I'll pass. There's enough on my plate already. Soft_rr in some form is a
decent idea but best tackled separately.

Con

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

\
 
 \ /
  Last update: 2005-03-22 13:47    [W:0.101 / U:0.160 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site