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Date: Thu, 19 Apr 2007 18:27:41 -0700 (PDT) From: Linus Torvalds <torvalds@...ux-foundation.org> To: Ed Tomlinson <edt@....ca> cc: Mark Lord <lkml@....ca>, Con Kolivas <kernel@...ivas.org>, Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...ux-foundation.org>, Nick Piggin <npiggin@...e.de>, Matt Mackall <mpm@...enic.com>, William Lee Irwin III <wli@...omorphy.com>, Peter Williams <pwil3058@...pond.net.au>, Mike Galbraith <efault@....de>, ck list <ck@....kolivas.org>, Bill Huey <billh@...ppy.monkey.org>, linux-kernel@...r.kernel.org, Arjan van de Ven <arjan@...radead.org>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: Renice X for cpu schedulers On Thu, 19 Apr 2007, Ed Tomlinson wrote: > > > > SD just doesn't do nearly as good as the stock scheduler, or CFS, here. > > > > I'm quite likely one of the few single-CPU/non-HT testers of this stuff. > > If it should ever get more widely used I think we'd hear a lot more complaints. > > amd64 UP here. SD with several makes running works just fine. The thing is, it probably depends *heavily* on just how much work the X server ends up doing. Fast video hardware? The X server doesn't need to busy-wait much. Not a lot of eye-candy? The X server is likely fast enough even with a slower card that it still gets sufficient CPU time and isn't getting dinged by any balancing. DRI vs non-DRI? Which window manager (maybe some of the user-visible lags come from there..) etc etc. Anyway, I'd ask people to look a bit at the current *regressions* instead of spending all their time on something that won't even be merged before 2.6.21 is released, and we thus have some mroe pressing issues. Please? Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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