From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <5.2.0.9.2.20030610125606.00cd04a0@pop.gmx.net> Date: Tue, 10 Jun 2003 13:31:32 +0200 From: Mike Galbraith Subject: Re: 2.5.70-mm6 In-Reply-To: <20030610092048.GB26348@holomorphy.com> References: <46580000.1055180345@flay> <51250000.1055184690@flay> <20030609200411.GA26348@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-linux-mm@kvack.org Return-Path: To: William Lee Irwin III Cc: Maciej Soltysiak , "Martin J. Bligh" , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: At 02:20 AM 6/10/2003 -0700, William Lee Irwin III wrote: >At some point in the past, I wrote: > >> How about one or the other of these two? (not both at once, though, > >> they appear to clash). > >On Tue, Jun 10, 2003 at 10:54:55AM +0200, Maciej Soltysiak wrote: > > Success, no audio skipps with galbraith.patch and mm6. (victim of fast hw methinks. dog slow old isa card will probably work fine) >Mike, any chance you can turn your series of patches into one that >applies atop mingo's intra-timeslice priority preemption patch? If >not, I suppose someone else could. I've never seen it. Is this the test-starve fix I heard mentioned on lkml once? >There also appears to be some kind of issue with using monotonic_clock() >with timer_pit as well as some locking overhead concerns. Something >should probably be done about those things before trying to merge the >fine-grained time accounting patch. Ingo had me measure impact with lat_ctx, and it wasn't very encouraging (and my box is UP). I'm not sure that I wasn't seeing some cache effects though, because the numbers jumped around quite a bit. Per Ingo, the sequence lock change will greatly improve scalability. Doing anything extra in that path is going to cost some pain though, so I'm trying to figure out a way to do something ~similar. (ala perfect is the enemy of good mantra). wrt pit, yeah, that diff won't work if you don't have a tsc. If something like it were used, it'd have to have ifdefs to continue using jiffies. (the other option being only presentable on April 1:) -Mike -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org