From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from wizmail.org (wizmail.org [IPv6:2a00:1940:107::2:0:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 4A2013CB38 for ; Wed, 13 Jan 2021 04:23:48 -0500 (EST) DKIM-Signature: v=1; a=ed25519-sha256; q=dns/txt; c=relaxed/relaxed; d=wizmail.org; s=e202001; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:MIME-Version:Date:Message-ID:From:References:To:Subject:From: Sender:Reply-To:Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive:Autocrypt; bh=F8FzSdiTg64sT2OOv1ced0MwMqOnS5adOykXPrbCY3Q=; b=BhAnUjaKnfDRYr+pypxZMGYod7 KiT1TVDNyxQ8cksePMHIgW8ZrX2B221mMCA7esxKDp6iyFfwQMWaCudFyoDQ==; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=wizmail.org ; s=r202001; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:From:Sender:Reply-To: Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive:Autocrypt; bh=F8FzSdiTg64sT2OOv1ced0MwMqOnS5adOykXPrbCY3Q=; b=oOD/gfEMRhwd981j7WFfEPrmOZ yhA9pTGfmmQ/CKucyOO7/XlY17yfwtv5Y6yS4yiSV5TPId9E6j2wyfDRmI1d1q0O6aw2q09Ii8BqD Ufz9NQynDuNd1NHYHWnOTxY5fbyUa+khFBTgTzu0qhoImYpewgNwcLQHBGSazNLACtiMnjiNKrlCC y3yveyWWktvrdYnq42pMVRsAWRjroQuv0P2CCxRE2x6mBJKJ3yhk1R8EFRXaNcnWnbW2MSpYX9+MH w8IKZ+ghCNTZSs8s9pB4Q42WLY2XY08GIYyCxMWPpBgxhclIH64LIhZ6Vv6uufE8krNChNMeXnEcu 1TPhjVEA==; Authentication-Results: wizmail.org; iprev=fail smtp.remote-ip=46.33.133.68; auth=pass (PLAIN) smtp.auth=jgh@wizmail.org Received: from [46.33.133.68] (helo=lap.dom.ain) (from_AS 51561) by wizmail.org (Exim 4.94.110) (TLS1.3) tls TLS_AES_128_GCM_SHA256 with esmtpsa id 1kzcNT-001CM2-Qg for ecn-sane@lists.bufferbloat.net (return-path ); Wed, 13 Jan 2021 09:23:43 +0000 To: ecn-sane@lists.bufferbloat.net References: From: Jeremy Harris Message-ID: <8ab8f210-8950-ae3a-e8c3-ed5603478600@wizmail.org> Date: Wed, 13 Jan 2021 09:23:43 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Pcms-Received-Sender: [46.33.133.68] (helo=lap.dom.ain) with esmtpsa Subject: Re: [Ecn-sane] what does ecnseen really mean? X-BeenThere: ecn-sane@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of explicit congestion notification's impact on the Internet List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Jan 2021 09:23:48 -0000 On 13/01/2021 04:48, Dave Taht wrote: > from a random box with bbr on and tons of connections. > > ``` > % sysctl -a | fgrep ecn > net.ipv4.tcp_ecn = 2 > net.ipv4.tcp_ecn_fallback = 1 > > % ss -antie 'src x.y/16' | fgrep bbr | fgrep -c ecn > 524 ecn show string "ecn" if the explicit congestion notification option is set > > % ss -antie 'src x.y/16' | fgrep bbr | fgrep -c ecnseen > 484 ecnseen show string "ecnseen" if the saw ecn flag is found in received packets > > % ss -antie 'src x.y/16' | fgrep bbr | wc -l > 22037 > ``` > > > -- Cheers, Jeremy