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From: Con Kolivas <kernel@kolivas.org>
To: Charlie Baylis <cb-lkml@fish.zetnet.co.uk>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] O12.2int for interactivity
Date: Tue, 5 Aug 2003 12:10:42 +1000	[thread overview]
Message-ID: <200308051210.42779.kernel@kolivas.org> (raw)
In-Reply-To: <20030804195058.GA8267@cray.fish.zetnet.co.uk>

On Tue, 5 Aug 2003 05:50, Charlie Baylis wrote:
> > I tried them aggressively; irman2 and thud don't hurt here. The idle
> > detection limits both of them from gaining too much sleep_avg while
> > waiting around and they dont get better dynamic priority than 17.
>
> Sounds like you've taken the teeth out of the thud program :) The original
> aim was to demonstrate what happens when a maximally interactive task
> suddenly becomes a CPU hog - similar to a web browser starting to render
> and causing intense X activity in the process. Stopping thud getting
> maximum priority is addressing the symptom, not the cause. (That's not to
> say the idle detection is a bad idea - but it's not the complete answer)

It was a side effect that it helped this particular issue. The idle detection 
was based around helping real world scenarios and it just happened to help.

> the idea is to do a little bit of work so that the idle detection doesn't
> kick in and thud can reach the max interactive bonus. (I haven't tried your
> patch yet to see if this change achieves this)

Good call; I was quite aware this is the most effective way to create a fork 
bomb with my patch, but it's effect while being noticably worse than the 
original thud is still not disastrous. Yes I do appreciate variations on the 
theme can be made worse again; I'm doing some testing and experimenting there 
to see how best to tackle it.

Con


  reply	other threads:[~2003-08-05  2:05 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-04 19:50 [PATCH] O12.2int for interactivity Charlie Baylis
2003-08-05  2:10 ` Con Kolivas [this message]
2003-08-05 22:49 ` Timothy Miller
2003-08-06  0:12   ` charlie.baylis
2003-08-06  1:23   ` Con Kolivas
2003-08-06 22:24     ` Timothy Miller
2003-08-11  8:14   ` Rob Landley
2003-08-11 23:49     ` Timothy Miller
2003-08-12  0:17       ` William Lee Irwin III
2003-08-12 15:04         ` Timothy Miller
2003-08-12 23:32           ` William Lee Irwin III
2003-08-13 15:46             ` Timothy Miller
2003-08-14  6:09               ` William Lee Irwin III
2003-08-14  6:59                 ` Con Kolivas
2003-08-14  7:01                   ` William Lee Irwin III
2003-08-14  7:46                     ` Con Kolivas
2003-08-14 20:03                       ` Timothy Miller
2003-08-15 16:40                         ` Con Kolivas
2003-08-14 20:00                     ` Timothy Miller
2003-08-15 16:38                       ` Con Kolivas
2003-08-15 18:12                         ` Timothy Miller
2003-08-17  2:19                           ` William Lee Irwin III
2003-08-17 18:00                           ` Mike Fedyk
2003-08-14 19:57                   ` Timothy Miller
2003-08-15 16:35                     ` Con Kolivas
2003-08-15 18:17                       ` Timothy Miller
2003-08-16  2:29                         ` Con Kolivas
2003-08-14 19:54                 ` Timothy Miller
  -- strict thread matches above, loose matches on Subject: below --
2003-08-03 21:19 Voluspa
2003-08-04  2:34 ` Con Kolivas
2003-08-03 10:14 Con Kolivas
2003-08-03 11:25 ` Ingo Molnar
2003-08-03 11:36   ` Con Kolivas
2003-08-04  3:06   ` Con Kolivas
2003-08-03 11:37 ` Felipe Alfaro Solana

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