Status of SCHED_ULE?

[Munish Chopra]

On 2003-09-30 02:07 +0300, Aggelos Economopoulos wrote:
> On Tuesday 30 September 2003 01:12, Jeff Roberson wrote:
> > On Tue, 30 Sep 2003, Aggelos Economopoulos wrote:
> > > On Monday 29 September 2003 08:05, Jeff Roberson wrote:
> > > > On Sun, 28 Sep 2003, Arjan van Leeuwen wrote:
> > >
> > > [...]
> > >
> > > > > It happens when compiling stuff, when loading complicated pages in
> > > > > Mozilla Firebird, and when logging out of GNOME 2.4 (the 'background
> > > > > fade' animation brings my Athlon XP 2000+ to its knees when I use
> > > > > SCHED_ULE).
> > > > >
> > > > > Arjan
> > > >
> > > > Gnome seems to be a common theme.  Are you also using libkse?  There
> > > > could be some interaction there.
> > >

I'm having the same experience, no gnome involved.

> > > I'm experiencing similar stuff with kde + libthr (kernel built with
> > > sources from 18/9).
> > >
> > > Aggelos
> >
> > Are you running seti, rc4, etc?  Any programs that sit in the background
> > and consume 100% of the cpu?
> 
> No. But interactive performance deteriorates instantly when compiling or 
> linking two or more programs (of course I expect it to deteriorate, but the 
> gui is _much_ more jerky with SCHED_ULE than with SCHED_4BSD). Let me know if 
> I can help with any more info.
> 

I second that. I'm not running anything heavy, background or
not. Windowmaker, a few desktops, a bunch of aterms -- that's more or
less all. The most easily noticeable pessimization is probably Firebird
(or Mozilla if you prefer). Compile anything, and try opening or closing
a few tabs, or navigating. It's rather painful.

This is on a Thunderbird 1200 sporting 512MB RAM. It's not exactly fast
by today's standards, but operation is much smoother under SCHED_4BSD.

-- 
Munish Chopra