Re: [PATCH v7 3/3] nl80211/mac80211: Report signal average

[Johannes Berg]

On Wed, 2010-11-17 at 17:28 +0900, Bruno Randolf wrote:

> > Or am I missing something here and we have a compiler that is actually
> > able to take care of this kind of optimizations by itself in the current
> > ewma library design? Or is the unsigned long division with the expected
> > weight values going to be fast enough to not justify caring about it
> > even on any of the embedded boards anyway?
> 
> I understand that this could be more efficient, but if it matters or not - 
> honestly, I don't know. Can a more knowledgeable person than me comment on 
> this?

Yes, it does matter -- think of an embedded MIPS board running at 500MHz
and trying to push 11n speeds.

johannes

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