Re: TCP rto estimation patch

From: Wesley Eddy
Date: Fri Apr 23 2004 - 15:49:11 EST

On Fri, Apr 23, 2004 at 01:35:27PM -0400, Horst von Brand wrote:
> Why RTT_ALPHA and RTTVAR_BETA, and not just RTT_BETA? Or even RTO_xxx?

Per the spec, alpha is used to compute rtt and beta likewise for rttvar.

> Is there any reason to change them, ever? What happens if you change them?
> Restrictions on values? All this should go with such a patch IMHO (at least
> pointers to relevant discussion).

The information isn't relevant since the patch didn't change them, and if
you were interested in changing the values then simple google search
would return a plethora of research on RTT estimation.

> Must go over it with a fine comb to make sure no unrelated 2 or 3 got
> replaced... out of my league, sorry.

There are stray constants all over the place, which is something that
even freshman computer science students are taught to avoid. This patch
represents a minor improvement to that situation.


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