From owner-freebsd-stable@FreeBSD.ORG Thu Nov 29 18:03:14 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E89F2BA9 for ; Thu, 29 Nov 2012 18:03:14 +0000 (UTC) (envelope-from bryanv@daemoninthecloset.org) Received: from torment.daemoninthecloset.org (ip-94-242-209-234.as5577.net [94.242.209.234]) by mx1.freebsd.org (Postfix) with ESMTP id 9623A8FC08 for ; Thu, 29 Nov 2012 18:03:14 +0000 (UTC) Received: from sage.daemoninthecloset.org (unknown [70.114.196.48]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "sage.daemoninthecloset.org", Issuer "daemoninthecloset.org" (verified OK)) by torment.daemoninthecloset.org (Postfix) with ESMTPS id A950E42C0864; Thu, 29 Nov 2012 19:05:53 +0100 (CET) X-Virus-Scanned: amavisd-new at daemoninthecloset.org Received: from sage.daemoninthecloset.org (sage.daemoninthecloset.org [127.0.1.1]) by sage.daemoninthecloset.org (Postfix) with ESMTP id 879EB73CED; Thu, 29 Nov 2012 12:01:57 -0600 (CST) Date: Thu, 29 Nov 2012 12:01:57 -0600 (CST) From: Bryan Venteicher To: "Constantine A. Murenin" Message-ID: <629913274.1988.1354212117368.JavaMail.root@daemoninthecloset.org> In-Reply-To: Subject: Re: virtio for 9.1-R MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.51.1.14] X-Mailer: Zimbra 7.2.0_GA_2669 (ZimbraWebClient - GC23 (Mac)/7.2.0_GA_2669) Cc: freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 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, 29 Nov 2012 18:03:15 -0000 Hi, > > What's the actual reallife performance benefits from virtio? > Twofold, > threefold, more, less? > A magnitude or more. I can push 6-7Gbs through vtnet vs. <400Mbs with the emulated e1000. The best advice of course is just to try it out in your environment. It may not matter depending on your needs. IIRC, I could get Linux VirtIO to do 8-9Gbs in the same setup. I hope to close that gap with my upcoming work. Bryan > Linux-KVM web-site, http://www.linux-kvm.org/page/Virtio, mentions > that they can push 1Gbps or so through the virtio network driver, but > the number seems meaningless, since no context is established of the > KVM performance prior to virtio. > > Another official-looking page, http://wiki.libvirt.org/page/Virtio, > fails to make any number-based sales pitch whatsoever, whereas > http://www.linux-kvm.org/page/Using_VirtIO_NIC likewise attempts to > show up some random meaningless numbers, still failing to establish > the context of what the performance is like without virtio. > > C. > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to > "freebsd-stable-unsubscribe@freebsd.org" >