netdev - Re: TCP fast retransmit

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Message-ID: <C0707EB4-E233-491E-8B05-7D0DACDE1C72@mpi-bpc.mpg.de>
Date:	Fri, 16 Dec 2011 16:53:45 +0100
From:	"Esztermann, Ansgar" <Ansgar.Esztermann@...-bpc.mpg.de>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: TCP fast retransmit

On Dec 15, 2011, at 9:24 , Eric Dumazet wrote:

> Really, my feeling is this trace is taken on receiver, and maybe LRO/GRO
> is buggy ?

Oh dear. I'm sorry, my mistake: in the beginning of a backup session, the server transmits to the client, so this is indeed taken on the receiver. I should have waited until the client begins to push data to the server, as that is where we've noticed the original problem of frequent RTOs.

I'll get a new trace extending all the way to the interesting part of the session...

Sorry for the confusion,

A.

-- 
Ansgar Esztermann
DV-Systemadministration
Max-Planck-Institut für biophysikalische Chemie, Abteilung 105

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