From owner-freebsd-stable@freebsd.org Thu Oct 3 10:49:20 2019 Return-Path: Delivered-To: freebsd-stable@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D0A9E130F80 for ; Thu, 3 Oct 2019 10:49:20 +0000 (UTC) (envelope-from petefrench@ingresso.co.uk) Received: from constantine.ingresso.co.uk (constantine.ingresso.co.uk [31.24.6.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 46kVB7689Bz3wqF for ; Thu, 3 Oct 2019 10:49:19 +0000 (UTC) (envelope-from petefrench@ingresso.co.uk) Received: from [2a02:b90:3002:411::6] (helo=dilbert.ingresso.co.uk) by constantine.ingresso.co.uk with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92.2 (FreeBSD)) (envelope-from ) id 1iFyfW-000Kow-Uq; Thu, 03 Oct 2019 10:49:10 +0000 Received: from petefrench by dilbert.ingresso.co.uk with local (Exim 4.92.3 (FreeBSD)) (envelope-from ) id 1iFyfW-0000uH-Q8; Thu, 03 Oct 2019 11:49:10 +0100 To: eugen@grosbein.net, freebsd-stable@freebsd.org, petefrench@ingresso.co.uk Subject: Re: Running iperf3 as a server drops all connections to a machine In-Reply-To: <59a037a5-03df-e143-41e9-0cfe648a3f22@grosbein.net> Message-Id: From: Pete French Date: Thu, 03 Oct 2019 11:49:10 +0100 X-Rspamd-Queue-Id: 46kVB7689Bz3wqF X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=pass (policy=none) header.from=ingresso.co.uk; spf=pass (mx1.freebsd.org: domain of petefrench@ingresso.co.uk designates 31.24.6.74 as permitted sender) smtp.mailfrom=petefrench@ingresso.co.uk X-Spamd-Result: default: False [-5.87 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; R_SPF_ALLOW(-0.20)[+ip4:31.24.6.74]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DMARC_POLICY_ALLOW(-0.50)[ingresso.co.uk,none]; IP_SCORE(-3.07)[ip: (-9.68), ipnet: 31.24.0.0/21(-4.84), asn: 16082(-0.75), country: GB(-0.08)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:16082, ipnet:31.24.0.0/21, country:GB]; RCVD_TLS_LAST(0.00)[] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Oct 2019 10:49:20 -0000 > > Any opinions or things people would ike me to check ? > > netstat -p tcp -ss > tcpdump -i $interface -npvs0 icmp or 'tcp[tcpflags] & (tcp-rst) !=3D 0' I havent had a chnace to look at this for a couple of days, but I thought I would give it mor testing now (doing the above). Updated to the latest -STABLE as I always do before checking things, and the problem has now gone away. Theres nothing I can see in the commits over the last few days which touches this - the only thign I can see is the changes to ixgbe, and mine is igb so it cant be that. The test I did at the time showed the network rate slowing to zero, but staying up if I didnt use cubic - the disconnect only happened using cubic, if thats a useful data point. I will try and find time to go back to the older ernel and see if it still does it. If not then I guess I can say it was a hardware fault, which seems to have fixed itself, but it didnt feel like it at the time. So, thats the update - will follow up to this thread if I can get it to happen again, and will make the suggested tests. (I assume you mean to run that inside 'screen' on the server side, yes?) thanks, -pete.