From owner-freebsd-amd64@FreeBSD.ORG Sun Jan 23 07:50:10 2011 Return-Path: Delivered-To: freebsd-amd64@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BA6FE106564A for ; Sun, 23 Jan 2011 07:50:10 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 7E12A8FC15 for ; Sun, 23 Jan 2011 07:50:10 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p0N7oAw9084679 for ; Sun, 23 Jan 2011 07:50:10 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p0N7oA4U084678; Sun, 23 Jan 2011 07:50:10 GMT (envelope-from gnats) Resent-Date: Sun, 23 Jan 2011 07:50:10 GMT Resent-Message-Id: <201101230750.p0N7oA4U084678@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-amd64@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Alex Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D6422106564A for ; Sun, 23 Jan 2011 07:41:53 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (unknown [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id C5E528FC0C for ; Sun, 23 Jan 2011 07:41:53 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p0N7fr8h020137 for ; Sun, 23 Jan 2011 07:41:53 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id p0N7frAn020136; Sun, 23 Jan 2011 07:41:53 GMT (envelope-from nobody) Message-Id: <201101230741.p0N7frAn020136@red.freebsd.org> Date: Sun, 23 Jan 2011 07:41:53 GMT From: Alex To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 X-Mailman-Approved-At: Sun, 23 Jan 2011 12:08:36 +0000 Cc: Subject: amd64/154236: High Collision count on "re" network interface X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 23 Jan 2011 07:50:10 -0000 >Number: 154236 >Category: amd64 >Synopsis: High Collision count on "re" network interface >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Jan 23 07:50:10 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Alex >Release: 8.2 RC2 >Organization: >Environment: FreeBSD srv.mydomain.net 8.2-RC2 FreeBSD 8.2-RC2 #1: Sun Jan 23 12:49:35 EST 2011 alex@nospam.nospam.nospam:/usr/obj/usr/src/sys/custom-server amd64 >Description: I can report this issue is also present in 8.1/amd64 (and also occurs with the stock GENERIC kernels in both releases) I am running FreeBSD on my VPS. The host is using XEN HVM. There is an unusually high collision rate being reported on the network interface: Name Mtu Network Address Ipkts Ierrs Idrop Opkts Oerrs Coll re0 1500 00:16:3e:f0:8b:6c 136929 0 0 104042 0 104036 So, out of 104042 packets transmitted, collisions were detected on 104036 of them. I thought that perhaps this may just be a XEN related issue until I ran into this article on the web: http://blather.michaelwlucas.com/?p=268&cpage=1 This seems to be the same issue, but when running FreeBSD under KVM. Same network interface (re). Is this likely to be an issue with the "re" driver under virtualized environments? >How-To-Repeat: Run FreeBSD 8.1/amd64 in a XEN HVM environment >Fix: >Release-Note: >Audit-Trail: >Unformatted: