Results using ULE

[Evan Dower]

I just switched to ULE (again) a couple days ago. I've been recompiling all 
of my ports due to the pthreads thing and I'm running Stanford's 
folding at home, so my system is pretty much never idle. I've noticed that 
sometimes when I haven't used my system interactively for a while (several 
hours), interactivity is slow to return when I start using it again. For 
maybe around a minute, I can move the mouse and then watch the pointer 
retrace my steps. Then interactivity will suddenly return, and mouse 
movement goes back to normal. I'm running with dual Athlon MP 1900+s:
FreeBSD lojak 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Fri Feb  6 10:46:15 PST 
2004    evantd at lojak.washington.edu:/usr/obj/usr/current/src/sys/CUSTOM  
i386
Thanks a lot and I hope somebody finds this helpful,
--
Evan Dower
Undergraduate, Computer Science
University of Washington
Public key: http://students.washington.edu/evantd/pgp-pub-key.txt
Key fingerprint = D321 FA24 4BDA F82D 53A9  5B27 7D15 5A4F 033F 887D




>From: Conrad Sabatier <conrads at cox.net>
>Reply-To: conrads at cox.net
>To: Kevin Oberman <oberman at es.net>
>CC: current at freebsd.org
>Subject: Re: Results using ULE
>Date: Mon, 09 Feb 2004 06:12:37 -0600 (CST)
>
>
>On 09-Feb-2004 Kevin Oberman wrote:
> > I have been using ULE on one system for about two weeks. The system is a
> > IBM T30 with 512 MB memory running current with ACPI. The video is an
> > ATi Radeon M7 with 1400x1050 display.
> >
> > Generally, ULE has run OK. It seems to do a bit better than BSD4 when
> > the system is heavily loaded. Right now I am encoding a CD and compiling
> > OpenOffice. The interactivity and responsiveness of the system is good.
> >
> > I have seen some areas, typically when the system is lightly loaded, 
>when
> > it works less well. All opinions are from non-quantified observation.
> >
> > 1. When logging off Gnome, the screen is progressively darkened after 
>the
> > logout window is opened. With BSD4, this darkening was smooth. With ULE,
> > it jumps in opacity. (Note that this is often on a totally idle system
> > except for logging off Gnome.)
> >
> > 2. I see occasional freezes in the system when it is mostly idle. Most
> > are very brief, but I had one yesterday that lasted for at least 30
> > seconds. No console errors were reported, but all windows owned by a
> > gnome-terminal process were frozen. (It is QUITE possible that this is
> > really a vte problem and is not related to ULE.)
> >
> > In general, I am pleased with the performance of the system since I
> > switched over to SCHED_ULE, but I still suspect something is not quite
> > right when a UP system is idle.
>
>One thing that really stands out is the peculiar behavior of top.  Several
>seconds may go by where all processes are showing zero CPU usage, then 
>suddenly
>one of them "comes alive" again.  It's weird.
>
>--
>Conrad Sabatier <conrads at cox.net> - "In Unix veritas"
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