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Date: Wed, 2 May 2007 10:13:56 +0200 From: Ingo Molnar <mingo@...e.hu> To: Gene Heskett <gene.heskett@...il.com> Cc: Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org, Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org>, Con Kolivas <kernel@...ivas.org>, Nick Piggin <npiggin@...e.de>, Arjan van de Ven <arjan@...radead.org>, Peter Williams <pwil3058@...pond.net.au>, Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr, Willy Tarreau <w@....eu>, Mark Lord <lkml@....ca>, Zach Carter <linux@...hcarter.com>, buddabrod <buddabrod@...il.com>, Balbir Singh <balbir@...ibm.com> Subject: Re: [patch] CFS scheduler, -v8 * Gene Heskett <gene.heskett@...il.com> wrote: > > I noticed a (harmless) bounds warning triggered by the reduction in > > size of array->bitmap. Patchlet below. > > I just checked my logs, and it appears my workload didn't trigger this > one Mike. [...] yeah: this is a build-time warning and it needs a newer/smarter gcc to notice that provably redundant piece of code. It's a harmless thing - but nevertheless Mike's fix is a nice little micro-optimization as well: it always bothered me a bit that at 140 priority levels we were _just_ past the 128 bits boundary by 12 bits. Now on 64-bit boxes it's just two 64-bit words to cover all 100 priority levels of RT tasks. > [...] And so far, v8 is working great here. And that great is in my > best "Tony the Tiger" voice, stolen shamelessly from the breakfast > cereal tv commercial of 30+ years ago. :) heh :-) > Ingo asked for a 0-100 rating, where 0 is mainline as I recall it, and > 100 is the best of the breed. I'll give this one a 100 till something > better shows up. nice - and you arent even using any OpenGL games ;) The 0-100 rating is really useful to me so that i can see the impact of regressions (if any) and it's also one single number representing the subjective impression - that way it's easier to keep tab of things. btw., do you still renice kmail slightly, or does it now work out of box with default nice 0? Ingo - 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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