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Message-ID: <4CB86804.7090600@oracle.com> Date: Fri, 15 Oct 2010 07:41:08 -0700 From: Randy Dunlap <randy.dunlap@...cle.com> To: Ben Pfaff <blp@...stanford.edu> CC: Bruno Randolf <br1@...fach.org>, linux-kernel@...r.kernel.org, akpm <akpm@...ux-foundation.org> Subject: Re: [PATCH] Add generic exponentially weighted moving average function On 10/14/10 20:40, Ben Pfaff wrote: > Randy Dunlap <randy.dunlap@...cle.com> writes: > >> On Wed, 06 Oct 2010 18:32:25 +0900 Bruno Randolf wrote: >> >>> This adds a generic exponentially weighted moving average function. This >>> implementation makes use of a structure which keeps a scaled up internal >>> representation to reduce rounding errors. >>> >>> The idea for this implementation comes from the rt2x00 driver (rt2x00link.c) >>> and i would like to use it in several places in the mac80211 and ath5k code. >> >> I guess I don't understand "exponentially weighted" or why that would >> be desirable. Please try to explain (briefly). > > I wrote up a fairly non-brief explanation of exponentially > weighted moving averages a few years ago: > http://www.stanford.edu/class/cs140/projects/pintos/pintos_7.html#SEC134 Thanks, nice writeup. -- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** -- 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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