From owner-freebsd-xen@freebsd.org Tue Jul 14 12:36:50 2015 Return-Path: Delivered-To: freebsd-xen@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 13DA29992BD for ; Tue, 14 Jul 2015 12:36:50 +0000 (UTC) (envelope-from syd.meyer@gmail.com) Received: from mail-wi0-x232.google.com (mail-wi0-x232.google.com [IPv6:2a00:1450:400c:c05::232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A35948D1 for ; Tue, 14 Jul 2015 12:36:49 +0000 (UTC) (envelope-from syd.meyer@gmail.com) Received: by wibud3 with SMTP id ud3so54484270wib.1 for ; Tue, 14 Jul 2015 05:36:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:subject:message-id:date :to:mime-version; bh=pW6MMDZbhBaCajNWIBicF+SzYV21ev62/EMA1TNU49g=; b=UO3JKBZ8Y/gBfpbgBwPm6qHYFQbv/U8L/8cx6POzgzuUx8kEAVfTs1auzwqw+DlEeK VnbJ0jH9EOnpwJzmLXzMAxKAyerFKMTtqLK8aPym4x/uisPkbBAQUv9Z9xiNsFpjX7g3 mQzqzckn33U77/WB+hFnUer2YKSheMJ0y+m7uw5AuY5qvCWAaHCGnXLqF2P87HF64gbS npCezTa535Uw78Io3n8yWzJ+aq/u7Zp/hBbPgPgF42fbpDHoWd1h+3B6v3xwNXR4z/6b 8PzXu0AXAVGuVn8YZ7hEAKFFPEgQIItV2HQesmxKd0X7iRxtqnCD1SYOw2xhX+H3v994 OrcQ== X-Received: by 10.194.205.225 with SMTP id lj1mr75756148wjc.138.1436877408207; Tue, 14 Jul 2015 05:36:48 -0700 (PDT) Received: from macbookpro.bob.sydneymeyer.net (64.167-243-81.adsl-dyn.isp.belgacom.be. [81.243.167.64]) by smtp.gmail.com with ESMTPSA id jy6sm1847550wjc.4.2015.07.14.05.36.46 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 14 Jul 2015 05:36:47 -0700 (PDT) From: Sydney Meyer Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Subject: Networking under Xen Message-Id: <4E7B7075-4E0D-4EA7-9F5D-6D252CFBD487@gmail.com> Date: Tue, 14 Jul 2015 14:36:48 +0200 To: freebsd-xen@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2102\)) X-Mailer: Apple Mail (2.2102) X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Jul 2015 12:36:50 -0000 Hello everybody, i have noticed some odd behaviour with networking under Xen with FreeBSD = 10 as a DomU. - IPv6 (TCP) bandwith drops from ~10 Gbit/s IPv4 to around 3 Gbit/s = IPv6. (measured with iperf) - Dropped/Stalled Connections with TCP Segmentation Offload and pf = enabled. - IPSEC-enabled Kernel TCP Performance drops from ~10 Gbit/s to ~200 = Mbit/s (iperf). I have observed this behaviour under Freebsd 10, 10.1 and 10 Stable. The Hypervisor is running Xen 4.4 with a Linux 3.16 Dom0. Any Suggestions?=