Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262872AbTGMMgl (ORCPT ); Sun, 13 Jul 2003 08:36:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264448AbTGMMgl (ORCPT ); Sun, 13 Jul 2003 08:36:41 -0400 Received: from c17870.thoms1.vic.optusnet.com.au ([210.49.248.224]:36035 "EHLO mail.kolivas.org") by vger.kernel.org with ESMTP id S262872AbTGMMgj (ORCPT ); Sun, 13 Jul 2003 08:36:39 -0400 From: Con Kolivas To: Guillaume Chazarain Subject: Re: [RFC][PATCH] SCHED_ISO for interactivity Date: Sun, 13 Jul 2003 22:53:12 +1000 User-Agent: KMail/1.5.2 References: In-Reply-To: Cc: linux kernel mailing list MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200307132253.12883.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1744 Lines: 43 On Sun, 13 Jul 2003 20:41, Guillaume Chazarain wrote: > Hi Con, > > I am currently testing SCHED_ISO, but I have noticed a regression: > I do a make -j5 in linux-2.5.75/ everything is OK since gcc prio is 25. > X and fvwm prio are 15, but when I move a window it's very jerky. Interesting. I don't know how much smaller the timeslice can be before different hardware will be affected. Can you report what cpu and video card you're using? Unfortunately I don't have a range of hardware to test it on and I chose the aggressive 1/5th timeslice size. Can you try with ISO_PENALTY set to 2 instead? > And btw, as I am interested in scheduler improvements, do you have a > testcase where the stock scheduler does the bad thing? Preferably without > KDE nor Mozilla (I don't have them installed, and I'll have access to a > decent connection in september). Transparency and antialiased fonts are good triggers. Launcing Xterm with transparency has been known to cause skips. Also the obvious make -j 4 kernel compiles, and while true ; do a=2 ; done as a fast onset full cpu hog > BTW2, you all seem to test interactivity with xmms. Just for those like me > that didn't noticed, I have just found that it skips much less with alsa's > OSS emulation than with alsa-xmms. Anything that increases the signal to noise ratio at helping us pick up skips/problems is useful, but this can help those that _don't_ want skips so thanks. > Thanks, Thank you very much for testing and reporting. Con - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/