From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) (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 4B3A03B29D for ; Wed, 9 Dec 2020 06:06:15 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1607511964; bh=zBG5Ynhpe7isWdKUOVZZzjdp47uD9fcl0xs8Ol2j9IE=; h=X-UI-Sender-Class:Subject:From:In-Reply-To:Date:Cc:References:To; b=gsX2hnRDjT0xbdcscJPWwxQpaCANIVpCJfLl81NI+OGpCI++3utLzyIod+gWU7psx O8oTebh03r89a26zwM5URU8m5qqRUj4roZA3p3yH2ri1POJHhw3MAbd913uDH9enw+ HDVnDeUDPi/P+89cRL5gv6cch+/jdoSwVyppa1Iw= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [192.168.250.102] ([134.76.241.253]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MybKp-1jvGfh3OdZ-00z0EE; Wed, 09 Dec 2020 12:06:04 +0100 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.17\)) From: Sebastian Moeller In-Reply-To: <877dprp7z3.fsf@toke.dk> Date: Wed, 9 Dec 2020 12:06:03 +0100 Cc: Kenneth Porter , Bufferbloat Mailing List Content-Transfer-Encoding: quoted-printable Message-Id: <472E7038-DC03-4A54-97BC-49999B78B343@gmx.de> References: <8E303BEF17675E3847CBD76C@[172.27.17.193]> <877dprp7z3.fsf@toke.dk> To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Mailer: Apple Mail (2.3445.104.17) X-Provags-ID: V03:K1:TUueA9cN0m3Q27fGmQ3KCmPp5Xyf7faRS7cp6zg/jgk/JZ6kkug m3jpDLpm/PjP6w7lUznpX2kV8vyhqOJ0FLWwCcHfNtriJ/2iDZ3h3bv69ua9sdD8cFP0SXg fW4iQOU0omHinj+8KlWIqz+bvL+1Uhkr/hDg25H5hS/3xDXyatIji7gh1Mp/5gKqy/kwK6x fW+mGUV6ir5tKW0duQqdA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:TH4hORhCzP4=:mcXz+h0HgHB5xqo8CJSqVh 8/+jmK3OYqN830cmtTj619jYCJC2biA2QXaSl7N99wPgwQQfQIQDEnZxh+jWfYiTvg53fUxUH I4AlGyYR656DJ2wRs+tgrPJd+zmBrDWosvWCR6znyQZEChn3qy1B0C42OH0s/fqD1MRvDaKEo ZemyB+MsYFcECXOVdRbAjzRhLZxiQL3VdG1zeIdU8cYpZZavIHbw+zeEc4TlJLB1x03wR6jdA BO9T3itfkfrHrF90g/wfFbjMPm2rwuZsetzm4sBQTrRl1RFqf19vXjqUg0mCuaqXZi9Vc3JHB WVaEKsKoSn/ntKOEsehyZKYHPwZogLv0zdB6oDb4XaAm1h+FrILkunL/cIbbQ0B0J83D4f42t U2H6pmR5kVDYY1Oupk96INfaPza4W4z3tEahShz5gJrnG7dyR6mAOqi3r2LcUH6BZ289JtgQZ GuXOasF5EBbAn8AH9p7pTvOqVsDp+BFFn+qLEfD+8qKDP1k/keUrdX60rLVjmdBOkLcCp2tJe 5N605i+G05wfXH6GoUA394eC3tpwkMCo2cDKTGMGTYcXezmJu94drM/jm7lGPP4s771BaIDg/ QU4XNgTtAvQTnZj4EQmmy3jFyZ/JNMDqlgmY454fLmOJgzpnv2dO2i60foE2J5HNx3dynG/v6 q+/aing0IA4moJZruHfKxbKXGqwrO2EkXYgs1Hkms0sgKQCZsE2Oukdn+gXPkvfv0sU/jMF+b 3QfI72gFVcNPPi31eHl5EFmgDzqJ/iiad7YXEpj9rPq2Heoijk7ibeoCB/eM2uy5C8uSYsr3r ns7GbBw/E314cNnD8F047HkOwx/CypLY1KVUgkB/+ttGALv2JRWNIB76y1K/wyN2bOPk/OVHj UaobqZQbNqvhdCDC/2mg== Subject: Re: [Bloat] Why you need at least 3Mbps upload to get good game performance with ~1500byte packets: Doing the math X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Dec 2020 11:06:15 -0000 Hi Toke, > On Dec 9, 2020, at 11:52, Toke H=C3=B8iland-J=C3=B8rgensen via Bloat = wrote: >=20 > Kenneth Porter writes: >=20 >> = >>=20 >> Upstream article: >>=20 >> = >=20 > Good points, but doesn't mention options to decrease the packet size > (lower MTU/MSS clamping)... :) But he is doing exactly that in the script he developed for = OpenWrt games on poor links: = https://github.com/dlakelan/routerperf/blob/master/SimpleHFSCgamerscript.s= h iptables -t mangle -F FORWARD # to flush the openwrt default MSS = clamping rule if [ $UPRATE -lt 3000 ]; then ipt64 -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -o = $LAN -j TCPMSS --set-mss 540 fi if [ $DOWNRATE -lt 3000 ]; then ## need to clamp MSS to 540 bytes in both directions to reduce ## the latency increase caused by 1 packet ahead of us in the ## queue since rates are too low to send 1500 byte packets at = acceptable delay ipt64 -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -o = $WAN -j TCPMSS --set-mss 540 fi We are actually trying to get something along that lines packaged as a = script for sqm-scripts, but that is delayed since I need to fix some = iptables stuff that seems to not work anymore first.... >=20 > -Toke > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat