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Date: Wed, 29 Aug 2007 16:15:28 -0700 (PDT) From: David Miller <davem@...emloft.net> To: rick.jones2@...com Cc: ian.mcdonald@...di.co.nz, netdev@...r.kernel.org, ilpo.jarvinen@...sinki.fi Subject: Re: [PATCH] make _minimum_ TCP retransmission timeout configurable From: Rick Jones <rick.jones2@...com> Date: Wed, 29 Aug 2007 16:06:27 -0700 > I belive the biggest component comes from link-layer retransmissions. > There can also be some short outtages thanks to signal blocking, > tunnels, people with big hats and whatnot that the link-layer > retransmissions are trying to address. The three seconds seems to be a > value that gives the certainty that 99 times out of 10 the segment was > indeed lost. > > The trace I've been sent shows clean RTTs ranging from ~200 milliseconds > to ~7000 milliseconds. Thanks for the info. It's pretty easy to generate examples where we might have some sockets talking over interfaces on such a network and others which are not. Therefore, if we do this, a per-route metric is probably the best bet. Ilpo, I'm also very interested to see what you think of all of this :-) - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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