Messages in this thread | | | From | Con Kolivas <> | Subject | Re: 2.5.74-mm1 and Con Kolivas' CPU scheduler work | Date | Fri, 4 Jul 2003 12:29:06 +1000 |
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On Fri, 4 Jul 2003 12:09, Tom Sightler wrote: > On Thu, 2003-07-03 at 19:49, Con Kolivas wrote: > > On Fri, 4 Jul 2003 02:36, ismail (cartman) donmez wrote: > > > Hi, > > > > > > With Con Kolivas' cpu patch I got many slow downs. When I try to run > > > CodeWeaver's CrossOver office box gets unresponsive at least for a one > > > minute. While starting KDE ( when splash screen is running ) mouse gets > > > too sluggish. > > > > While your wm starting if your mouse is sluggish it is probably not a big > > problem, and it is part of something I'm already working on. The > > codeweavers problem is impressive though; I don't have codeweavers and > > have not seen anything like it. To get a full picture it would be helpful > > if you could run top as root say reniced to -13 just so it doesn't miss > > anything, and then start codeweavers, watch top and tell me what is > > spinning away hogging the cpu. > > My guess is that he's seeing the same issue that I reported a few weeks > ago with Crossover plugin. That report generated a fairly long thread > and a lot of patches and testing, but little actual progress. Basically > wine seems to have multiple threads and a client/server architecture and > seems constantly spin on a pipe passing info back and forth to each > other. It seems one thread gets all the attention and starves the > others although the others are critical for the main process to actually > make progress. > > I've been wanting to do some testing with your patches so I'll give them > a spin tonight and see how this acts.
Ah yes I believe I know this issue. The problem is the parent spinning madly waiting for the child and it is the parent that starves the child. While this is not a fix, if you can reproduce the problem can you try changing CHILD_PENALTY in kernel/sched.c from 50 to 100 and see if that makes the problem go away? I mentioned this hidden in a thread a while ago, and am trying to get a reasonable fix.
Con
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