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Date: Sat, 15 Sep 2007 23:49:56 -0700 (PDT)
From: Jeff Roberson <jroberson@chesapeake.net>
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To: Roman Bogorodskiy <novel@freebsd.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: SCHED_ULE on desktop system
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On Sun, 16 Sep 2007, Roman Bogorodskiy wrote:

> Hello,
>
> I'm curious if SCHED_ULE is designed to be used on a desktop system. I'm
> running -CURRENT at home and tried to use SCHED_ULE for some time. It
> works alright while the load is not very high. But once I start
> compiling something (running 'make buildworld' or 'portupgrade -a' for
> example), the machine comes almost unusable - X11's windows takes a lot
> of time to redraw, changing virtual desktop in window manager may take
> a several seconds. And it's nearly impossible to watch some movie with
> mplayer.

Roman,

This is contrary to the experiences of many others.  Can you send me your 
dmesg?  There may be something about your particular hardware that is 
triggering a bug.  ULE is definitely designed to be responsive on the 
desktop.

Thanks,
Jeff

>
> However, when I switch to SCHED_4BSD, system's reaction time gets lower
> and I even can watch a movie with mplayer when compiling something.
>
> Is SHCED_ULE designed to behave that way or I spotted some bug?
>
> PS I run UP system.
>
> Roman Bogorodskiy
>