Re: cvs commit: src/sys/kern sched_ule.c (fwd)

On Tue, 17 Jun 2003 02:45:18 -0400 (EDT), Jeff Roberson 
<jroberson_at_chesapeake.net> wrote:

> My last few commits, including this one, went a long way towards 
> improving
> ULE's interactive responsiveness under heavy load.  I was just able to do
> a make -j32 of my kernel while browsing the web with mozilla and 
> commiting
> this change.  Mozilla, my shell, cvs, etc. were all as responsive as they
> are on an unloaded system.

Don't you think, the mplayer, xine and sound stuff might be better apps to 
test? Like, play the video and sound to see if they won't skip the frames 
or lag behind.

Cheers,
Mezz

> This is on a 2ghz laptop so your mileage may not be exactly the same.
> This is a significant improvement over the old state of things.  If the
> interactive perf was chasing you away before, ULE should be much better
> now.
>
> Cheers,
> Jeff
>
>
> ---------- Forwarded message ----------
> Date: Mon, 16 Jun 2003 23:39:51 -0700 (PDT)
> From: Jeff Roberson <jeff_at_FreeBSD.org>
> To: src-committers_at_FreeBSD.org, cvs-src_at_FreeBSD.org, cvs-all_at_FreeBSD.org
> Subject: cvs commit: src/sys/kern sched_ule.c
>
> jeff        2003/06/16 23:39:51 PDT
>
> FreeBSD src repository
>
> Modified files:
> sys/kern             sched_ule.c
> Log:
> - Add a new function "sched_interact_update()" that scales back the sleep
> and run time.
> - Scale the sleep and run time back via sched_interact_update() in more
> places.  This is to keep the statistic more accurate.
> - Charge a parent one tick for forking a child.
> - Add only the run time and not the sleep time to the parents kg when a
> thread exits.  This allows us to give a penalty for having an expensive
> thread exit but does not give a bonus for having an interactive thread
> exit.
> - Change the SLP_RUN_THROTTLE to limit us to 4/5th and not 1/2.
> - Change the SLP_RUN_MAX to two seconds.  This keeps bursty interactive
> applications like mozilla and openoffice in the interactive range even
> through expensive tasks.
> - Recalculate the slice after every sleep.  This ensures that once a task
> has been marked interactive it only has a slice of 1 at the risk of
> giving tasks that sleep for a very brief period a longer time slice.
>
> Revision  Changes    Path
> 1.42      +20 -23    src/sys/kern/sched_ule.c


-- 
bsdforums.org 's moderator, mezz.