From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 1 Sep 2001 14:13:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 1 Sep 2001 14:12:47 -0400 Received: from minus.inr.ac.ru ([193.233.7.97]:39428 "HELO ms2.inr.ac.ru") by vger.kernel.org with SMTP id ; Sat, 1 Sep 2001 14:12:42 -0400 From: kuznet@ms2.inr.ac.ru Message-Id: <200109011812.WAA19822@ms2.inr.ac.ru> Subject: Re: Excessive TCP retransmits over lossless, high latency link To: ak@muc.de (Andi Kleen) Date: Sat, 1 Sep 2001 22:12:46 +0400 (MSK DST) Cc: lk@tantalophile.demon.co.uk, davem@redhat.com, ak@muc.de, linux-kernel@vger.kernel.org In-Reply-To: <20010901194141.44617@colin.muc.de> from "Andi Kleen" at Sep 1, 1 07:41:41 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello! > packet loss and never has a chance to find out about the longer RTT, because > that only works with new ACKs. Karn algo calculates right rtt after log(rtt/3sec) retransmits. It is not so big number. In this case, it is 1 in fact. The only effect of irtt setting is avoiding one retransmission. Alexey