From owner-freebsd-net@freebsd.org Thu Jul 7 08:19:40 2016 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DBBDEB7657E for ; Thu, 7 Jul 2016 08:19:40 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id BD3AE1F69 for ; Thu, 7 Jul 2016 08:19:40 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u678JeLS086270 for ; Thu, 7 Jul 2016 08:19:40 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-net@FreeBSD.org Subject: [Bug 210488] ue0 axge AX88179 Ierrs errors under havy network load Date: Thu, 07 Jul 2016 08:19:41 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.3-RELEASE X-Bugzilla-Keywords: patch X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: yongari@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-net@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jul 2016 08:19:41 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D210488 --- Comment #8 from Pyun YongHyeon --- (In reply to mtatarin76 from comment #7) Probably you can put flow control options to '/etc/start_if.ue0' file as a workaround(Not tested though). Enabling flow-control by default in driver would be a POLA violation so I wanted to mitigate the issue when flow-control is not active. However, it seems there is no good way to mitigate the issue without increasing H/W RX FIFO size. The hardware have a fixed sized buffer so we may have to rely on other way like flow-control to mitigate that. The issue shall frequently happen when the controller operates at high-speed(USB 2.0) and established link is 1000baseT(i.e. the network bottleneck is USB 2.0 bus). I contacted the vendor to get more information on the issue so let's see how it goes. If the vendor confirms my theory, documenting it in axge(4) would be best one. I guess you may see better result when you plug the controller to USB 3.0 port. Due to lack of H/W, I wasn't able to test that. Thanks for testing! --=20 You are receiving this mail because: You are the assignee for the bug.=