From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cassarossa.samfundet.no (cassarossa.samfundet.no [IPv6:2001:67c:29f4::29]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 509D63B25E for ; Fri, 21 Oct 2016 06:42:20 -0400 (EDT) Received: from pannekake.samfundet.no ([2001:67c:29f4::50] ident=unknown) by cassarossa.samfundet.no with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1bxXHF-0002EL-Np; Fri, 21 Oct 2016 12:42:18 +0200 Received: from sesse by pannekake.samfundet.no with local (Exim 4.84_2) (envelope-from ) id 1bxXHF-0009F0-LQ; Fri, 21 Oct 2016 12:42:17 +0200 Date: Fri, 21 Oct 2016 12:42:17 +0200 From: "Steinar H. Gunderson" To: Eric Dumazet Cc: bloat Message-ID: <20161021104217.GA35316@sesse.net> References: <20161021084726.GA1913@sesse.net> <1477045681.7065.43.camel@edumazet-glaptop3.roam.corp.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1477045681.7065.43.camel@edumazet-glaptop3.roam.corp.google.com> X-Operating-System: Linux 4.9.0-rc1 on a x86_64 User-Agent: Mutt/1.5.23 (2014-03-12) Subject: Re: [Bloat] "BBR" TCP patches submitted to linux kernel 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: Fri, 21 Oct 2016 10:42:20 -0000 On Fri, Oct 21, 2016 at 03:28:01AM -0700, Eric Dumazet wrote: > Could you provide /proc/sys/net/ipv4/tcp_rmem > and /proc/sys/net/ipv4/tcp_wmem values on your server ? I see I have old sysctl.conf settings here, from tuning way back in the 2.6 era: net/core/rmem_max = 8738140 net/core/wmem_max = 8738140 net/ipv4/tcp_rmem = 4096 873814 8738140 net/ipv4/tcp_wmem = 4096 873814 8738140 Perhaps it's time to kill them, but I don't know what the defaults are :-) > What is the rtt between your two hosts ? 35.7–36.0 ms. /* Steinar */ -- Homepage: https://www.sesse.net/