From owner-freebsd-bugs@FreeBSD.ORG Thu May 7 12:43:50 2015 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 18EFB5F7 for ; Thu, 7 May 2015 12:43:50 +0000 (UTC) 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 DE0A310A4 for ; Thu, 7 May 2015 12:43:49 +0000 (UTC) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.14.9/8.14.9) with ESMTP id t47Chn5L086651 for ; Thu, 7 May 2015 12:43:49 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 200026] em driver reports "Watchdog timeout -- resetting" on vmware ESXi Date: Thu, 07 May 2015 12:43:50 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: nick@foobar.org X-Bugzilla-Status: New X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 May 2015 12:43:50 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200026 Bug ID: 200026 Summary: em driver reports "Watchdog timeout -- resetting" on vmware ESXi Product: Base System Version: 10.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: nick@foobar.org the freebsd em driver periodically hangs when running in a VM on all versions of esxi after (but not including) build 799733 (ESXi 5.0 GA). The symptoms of the problem are that the freebsd vm drops traffic on the affected interface for a period of time. The kernel reports errors: Apr 22 19:12:08 xxxx kernel: em0: Watchdog timeout -- resetting Apr 25 07:38:18 xxxx kernel: em0: Watchdog timeout -- resetting Apr 27 23:29:35 xxxx kernel: em1: Watchdog timeout -- resetting Apr 29 18:03:29 xxxx kernel: em1: Watchdog timeout -- resetting May 5 05:28:38 xxxx kernel: em1: Watchdog timeout -- resetting FreeBSD 8/9 were particularly badly affected by this, to the point that the em driver was totally unusable on those versions when running as vm after esxi build 799733, i.e ~30% packet loss for pings. The intel em driver update in 10.0 helped quite a bit, and anecdotally the problem seems to be less bad on ESXi 6.0. Now the figure seems to be down at around 1-2% pktloss over extended periods of time. However it's still there on 10.1 with all recent versions of esxi, and prevents freebsd from being able to function properly as a router when using the em interface. The problem also affects freebsd derivatives (e.g. some versions of JunOS Firefly / vRR / vMX, etc). -- You are receiving this mail because: You are the assignee for the bug.