Re: [patch] delayed acks decrease performances in congestioned networks

Andrea Arcangeli (andrea@e-mind.com)
Wed, 18 Nov 1998 17:12:13 +0100 (CET)


On Tue, 17 Nov 1998, Andi Kleen wrote:

>- People will enable it which will lead to more congestion because of
>more packets.

Did you read my thought about the congestion issue? I think that we could
eventually end up wasting more bandwith with delayed-acks because if the
net drops an delayed-ack, the other end could have to retransmit _two_
packets _full_ of data.

>- A global sysctl is not fine grained enough, if you need it make it at
>least a per route attribute (like mss or window)

This is a good reason. I just thought about it.

>Because of the first reason I would prefer to not implement it.

Since I didn' t know if it would accepted I didn' t implemented as a per
route flag. For my needs a sysctl is good enough and doesn' t break any
kind of RFC or tcp-impl draft AFIK.

Andrea Arcangeli

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